CN108597977A - A kind of cross-linking type fluorescent display screen and the preparation method and application thereof - Google Patents

A kind of cross-linking type fluorescent display screen and the preparation method and application thereof Download PDF

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Publication number
CN108597977A
CN108597977A CN201810478833.7A CN201810478833A CN108597977A CN 108597977 A CN108597977 A CN 108597977A CN 201810478833 A CN201810478833 A CN 201810478833A CN 108597977 A CN108597977 A CN 108597977A
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layer
material layer
display screen
cross
linking type
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CN201810478833.7A
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CN108597977B (en
Inventor
莫越奇
舒伟
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00Cathode ray tubes; Electron beam tubes
    • H01J31/08Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123Flat display tubes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J3/00Details of electron-optical or ion-optical arrangements or of ion traps common to two or more basic types of discharge tubes or lamps
    • H01J3/14Arrangements for focusing or reflecting ray or beam
    • H01J3/20Magnetic lenses

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  • Overhead Projectors And Projection Screens (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The invention belongs to the preparing technical fields of display screen, and in particular to a kind of cross-linking type fluorescent display screen and the preparation method and application thereof.The display screen includes the substrate being sequentially overlapped, red fluorescence material layer, the first separation layer, green fluorescent material layer, the second separation layer, blue fluorescent material layer and protective layer; the setting of separation layer makes fluorescent material not interfere with each other; when the material of separation layer contains extinction group or extinction dyestuff, the high energy laser of front is noiseless to rear layer.The display screen is super flat transparent material, and the fluorescent material of use has anisotropy, can avoid diffusing reflection and specular reflection problems, especially be cross-linking type fluorescent material, thermal stability is more preferable, and when using laser as light source, high resolution is up to 10k.The display screen preparation method is simple, and of low cost, technically reliable, service life is long, light, foldable, expansion, not afraid of water, does not have to electric drive, economical, durable, therefore can be applied in many fields.

Description

A kind of cross-linking type fluorescent display screen and the preparation method and application thereof
Technical field
The invention belongs to the preparing technical fields of display screen, and in particular to a kind of cross-linking type fluorescent display screen and its preparation side Method and application.
Background technology
With the rise of VR technologies, the head of ultrahigh resolution is aobvious by as one of the wearable device of the following mainstream, and projection is aobvious Show technology due to relative maturity, product is reliable, therefore as the first choice of VR display technologies.Projection Display is by flat image information Light source is controlled, using optical system and projector space image magnification and the method or apparatus of display on the projection screen.However The resolution ratio of Projection Display is low at present, limits its application in high-resolution VR equipment.
The low reason of Projection Display resolution ratio is the visual angle very little of mirror-reflection, it is impossible to be used in display, it is therefore necessary to use Diffusing reflection screen.Laser more can be equably reflected into the eye of spectators by the rough surface of diffusing reflection screen.But screen is thick Rugosity must be over the wavelength of light, and coarse surface easy tos produce interference, that is, so-called laser speckle for laser Phenomenon, therefore Projection Display determines its low resolution in principle.The resolution requirement of VR glasses reaches 4K or more, at present only There are OLED micro displays that can just accomplish.But OLED technology threshold and investment amount it is all very high, yield is very low, especially with the service life compared with It is short, it holds at high price, bigger is challenged for OLED micro displays.
Invention content
The shortcomings that overcome the prior art and deficiency, the primary purpose of the present invention is that providing a kind of cross-linking type fluorescence display Screen.
It is a further object of the present invention to provide the preparation methods of above-mentioned cross-linking type fluorescent display screen.
Another object of the present invention is to provide the application of above-mentioned cross-linking type fluorescent display screen.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of cross-linking type fluorescent display screen, including the substrate, red fluorescence material layer, the first separation layer, green that is sequentially overlapped Color fluorescent material layer, the second separation layer, blue fluorescent material layer and protective layer;
The material of the blue fluorescent material layer, green fluorescent material layer and red fluorescence material layer is cross-linking type fluorescence Material.
During use, laser enters from protective layer side.
Different from common organic or high molecular fluorescent material, cross-linking type fluorescent material has better thermal stability.Specifically , common organic and high molecular fluorescent material display screen can go out in the case of the fixed point irradiation for a long time of 980nm infrared lasers The case where existing slight shift diffusion.Since these are organic and high molecular fluorescent material has no significantly 980nm infrared lasers The reason of being absorbed caused by electron excitation, therefore causing such case should be fuel factor, i.e., organic and macromolecule is increased in temperature When sub-chain motion aggravate, cause to migrate and spread, and then local luminous intensity is caused to slightly decrease.And cross-linking type fluorescent material can To solve the problems, such as this, stable appearance, long-lived display screen are obtained.
Preferably, the material of the blue fluorescent material layer, green fluorescent material layer and red fluorescence material layer is side The main chain conjugated structure of the crosslinking group of chain belt.
It is furthermore preferred that the material of the blue fluorescent material layer, green fluorescent material layer and red fluorescence material layer Backbone structure is:Polyfluorene class homopolymer or copolymer, polysilico fluorene class homopolymer or copolymer, polycarbazole class homopolymer or copolymerization Object, polyphenyl class homopolymer or copolymer, polythiophene class homopolymer or copolymer, small molecule fluorescent material, complex triplet state material Material, thermal activities type delayed fluorescence TADF materials or gathering induced luminescence material.
It is furthermore preferred that the crosslinked group be Fluoromar (Ohio Med.), styrene, benzocyclobutane, acrylic acid, siloxanes, Cinnamic acid, oxetanes or anthracene, molecular structure are as follows:
Dotted line indicates the position of functional group's link.
It is further preferred that the material of the red fluorescence material layer has following any structural formula:
The structural formula of the material of the green fluorescent material layer is as follows:
The structural formula of the material of the blue fluorescent material layer is as follows:
Wherein, R1And R2For the alkyl of C1~C20, Fluoromar (Ohio Med.), styrene, benzocyclobutane, acrylic acid, siloxanes, Cinnamic acid, oxetanes or anthracene;
But R1And R2It is asynchronously alkyl.
Preferably, the blue fluorescent material layer, green fluorescent material layer, red fluorescence material layer, the first separation layer Thickness with the second separation layer is 10nm~1mm.
Preferably, the blue fluorescent material layer, green fluorescent material layer, red fluorescence material layer, the first separation layer It is less than the 5% of respective thickness with the flatness of the second separation layer.
Preferably, the protective layer is transparent high molecular material.
It is furthermore preferred that the material of the protective layer is polymer and its blend containing siloxanes.
It is further preferred that the material of the protective layer is polysiloxanes.
The protective layer plays hydrophobic dust-proof effect.
Preferably, the material of first separation layer and the second separation layer is polar macromolecule material or polarity high score Sub- material and extinction dyestuff, or the material containing extinction group.
It is furthermore preferred that the polarity macromolecule material be polyvinylpyrrolidone, acrylic copolymer, epoxy resin, Polyurethane, melmac or polyimides.
It is furthermore preferred that the material absorbable wavelength of second separation layer is less than the light of 450nm, the described first isolation The material absorbable wavelength of layer is less than the light of 550nm.
It is further preferred that the extinction dyestuff is azo dyes, xanthenes class dyestuff or anthraquinone dyes.
It is further preferred that the material containing extinction group is the polyimides for including big conjugation group.
Preferably, the material of the substrate is glass, polyester or polyimide flex base material.
The displaying principle of above-mentioned cross-linking type fluorescent display screen is as follows:
1. the acquisition of blue light.Projector projects 405nm purple lights, light pass through the protective layer of all-transparent to enter blue fluorescent body, In the case where 405nm is purple light excited, blue fluorescent material layer is excited, and sends out 430-450nm blue-fluorescences.Blue-fluorescence is counter to wear protection Layer enters human eye, forms blue pixel point.
2. the acquisition of green material light.Projector projects 450nm blue lights, light pass through the protective layer of all-transparent, glimmering into blue Optical material layer, because blue fluorescent material layer is not absorbed in 450nm, laser will continue without absorbing to pass through the second separation layer, Into green fluorescent material layer.Under the excitation of 450nm blue lights, green fluorescent material layer is excited, and it is glimmering to send out 500-550nm greens Light.Green fluorescence successively it is counter wear before the second separation layer, blue fluorescent material layer and protective layer, do not absorbed, into people Eye forms green pixel point.
3. the acquisition of feux rouges.Projecting apparatus sends out 532nm green lights, and light sequentially enters the protective layer of all-transparent, blue-fluorescence material The bed of material, the second separation layer, green fluorescent material layer, the first separation layer, are not absorbed, and red fluorescence material layer is finally entered. Under the excitation of 532nm green lights, red fluorescence material layer is excited, and sends out 590-650nm red fluorescences.Red fluorescence is counter successively to be worn The first separation layer, green fluorescent material layer, the second separation layer, blue fluorescent material layer and protective layer before, do not absorb, into Enter human eye, forms red pixel point.
The present invention further provides the preparation methods of above-mentioned cross-linking type fluorescent display screen, include the following steps:It will be red glimmering Optical material layer, the first separation layer, green fluorescent material layer, the second separation layer, blue fluorescent material layer and protective layer material adopt It is formed a film on substrate successively with the mode of spin coating, pulling film forming, roller coating or vacuum evaporation glimmering to get the cross-linking type Light display screen.
Preferably, the cross-linking type in the red fluorescence material layer, green fluorescent material layer and blue fluorescent material layer is glimmering The crosslinking condition of luminescent material is:
When crosslinked group is Fluoromar (Ohio Med.), styrene, benzocyclobutane or acrylic acid:Heating temperature 120~240 DEG C, the time be 0.1~for 24 hours;
When crosslinked group is siloxanes:1~240h is placed in environment of the humidity more than 10%;
When crosslinked group is cinnamic acid, oxetanes or anthracene:With power be 1~1000W, wavelength is 254~400nm Ultra violet lamp 1min~for 24 hours.
The present invention further provides the applications of above-mentioned cross-linking type fluorescent display screen, and the cross-linking type fluorescent display screen is used as The projection screen of laser projection.
Compared with prior art, the present invention having the following advantages and advantages:
1. display screen prepared by the present invention is super flat transparent material, the diffusing reflection that can fully avoid rough surface from bringing is asked Topic.Further, since the cross-linking type fluorescent material used has anisotropy, be not in interference problem, therefore gained is super flat Display screen avoids common mirror-reflection phenomenon of the super screen under reflex mechanism, screen use in the process without granular sensation, point Resolution is determined by the laser facula emitted, therefore resolution ratio can reach 10k or more, is far above the resolution ratio of OLED.In addition, adopting Common organic and high molecular fluorescent material is different from cross-linking type fluorescent material with better thermal stability to be conducive to Obtain stable appearance, long-lived display screen.
2. the present invention obtains full-color, high-resolution fluorescence display using multilayered structure, the display screen of preparation uses three kinds of face The cross-linking type fluorescent material of color is prepared, which is isolated layer isolation, does not interfere with each other.When the material of separation layer When material containing extinction dyestuff or separation layer itself contains extinction group, the high energy laser and each glimmering of projecting apparatus transmission The high-energy fluorescence that optical material layer is sent out does not generate interference to subsequent green fluorescent layer and red fluorescence layer, to inhibit colour purity The phenomenon that degree declines.
3. the cross-linking type fluorescent display screen preparation method in the present invention is simple, of low cost, technically reliable, service life It is long.It can be not only used for high-resolution VR and shows, the high-resolution that can be used for small-medium size is shown.It, can since it is light It folds, expansion, it is not afraid of water, do not have to electric drive, it is economical, it is durable, therefore can be applied in many fields.Especially as operation The host machine part of the further development of speed and cloud computing, follow-on mobile phone, IPAD and laptop computer can be smaller and smaller, and Screen is a main trend using laser projection, and display screen proposed by the present invention can just solve the problems, such as that its resolution ratio is low.
Description of the drawings
Fig. 1 is the structural schematic diagram of heretofore described cross-linking type fluorescent display screen.
Fig. 2 is the displaying principle schematic diagram of heretofore described cross-linking type fluorescent display screen.
Specific implementation mode
With reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited In this.For not specifically specified technological parameter, routine techniques progress can refer to.
Embodiment 1
The present embodiment provides a kind of cross-linking type fluorescent display screens and preparation method thereof.
A kind of cross-linking type fluorescent display screen:
As shown in Figure 1, the cross-linking type fluorescent display screen in the present embodiment is by substrate (1), red fluorescence material layer (2), One separation layer (3), green fluorescent material layer (4), the second separation layer (5), blue fluorescent material layer (6) and protective layer (7) are successively It is formed by stacking.
The substrate is made of glass;
The structural formula of the material of the red fluorescence material layer is as follows:
The structural formula of the material of the green fluorescent material layer is as follows:
The structural formula of the material of the blue fluorescent material layer is as follows:
The material of first separation layer and the second separation layer is polyvinylpyrrolidone, and structural formula is as follows:
The material of the protective layer is polysiloxanes.
The preparation method of above-mentioned cross-linking type fluorescent display screen:
Red fluorescence material is dissolved in toluene, the red fluorescence toluene solution of a concentration of 2wt.% is made, with 1800rpm Rotating speed spin coating 30 seconds on the glass substrate, heating in vacuum 12 hours, obtain red fluorescence material in 120 DEG C of vacuum drying chambers Layer.The Sudan II of polyvinylpyrrolidone and 1% is dissolved in butyl glycol ether, the separation layer of a concentration of 10wt.% is made Solution, with the rotating speed of 2800rpm on red fluorescence material layer spin coating 30 seconds, obtain the first separation layer (3).By green fluorescence material Material is dissolved in toluene, the green fluorescence toluene solution of a concentration of 3wt.% is made, with the rotating speed of 2100rpm in the first separation layer (3) spin coating 30 seconds on, heating in vacuum 12 hours in 120 DEG C of vacuum drying chambers, obtain green fluorescent material layer.By polyethylene pyrrole Pyrrolidone and 1% azo solvent yellow 2 dyestuff are dissolved in butyl glycol ether, and the separation layer that a concentration of 10wt.% is made is molten Liquid, with the rotating speed of 2800rpm on green fluorescent material layer spin coating 30 seconds, obtain the second separation layer (5).By blue fluorescent material It is dissolved in toluene, the blue-fluorescence toluene solution of a concentration of 1wt.% is made, with the rotating speed of 2300rpm in the second separation layer (5) Upper spin coating 30 seconds, heating in vacuum 12 hours in 120 DEG C of vacuum drying chambers, obtains blue fluorescent material layer.By a concentration of 10% Polysiloxane emulsion with the rotating speed of 2800rpm spin coating 30 seconds on blue fluorescent material layer, obtain protective layer.
Because cross-linking type fluorescent material is dissolved only in the nonpolar solvents such as toluene, chloroform, and cannot be dissolved in butyl glycol ether, institute Will not mix between each layer, what is obtained is complete multilayered structure.
Embodiment 2
The present embodiment provides a kind of cross-linking type fluorescent display screens and preparation method thereof.
The structure of cross-linking type fluorescent display screen in the present embodiment and preparation method thereof is same as Example 1, difference lies in Fluorescent material especially its crosslinked group is different and crosslinking process is different.
The structural formula of the material of the red fluorescence material layer is as follows:
The structural formula of the material of the green fluorescent material layer is as follows:
The structural formula of the material of the blue fluorescent material layer is as follows:
The preparation method of above-mentioned cross-linking type fluorescent display screen:
Red fluorescence material is dissolved in toluene, the red fluorescence toluene solution of a concentration of 2wt.% is made, with 1800rpm Rotating speed spin coating 30 seconds on the glass substrate obtained red glimmering under a nitrogen atmosphere with 100 watts of 365nm ultra violet lamps 5 minutes Optical material layer.The Sudan II of polyvinylpyrrolidone and 1% is dissolved in butyl glycol ether, is made a concentration of 10wt.%'s Separation layer solution, with the rotating speed of 2800rpm on red fluorescence material layer spin coating 30 seconds, obtain the first separation layer (3).It will be green Fluorescent material is dissolved in toluene, and the green fluorescence toluene solution of a concentration of 3wt.% is made, with the rotating speed of 2100rpm first every Spin coating 30 seconds on absciss layer (3) obtains green fluorescent material layer under a nitrogen atmosphere with 100 watts of 365nm ultra violet lamps 5 minutes. The azo solvent yellow 2 dyestuff of polyvinylpyrrolidone and 1% is dissolved in butyl glycol ether, a concentration of 10wt.% is made Separation layer solution, with the rotating speed of 2800rpm on green fluorescent material layer spin coating 30 seconds, obtain the second separation layer (5).It will be blue Color fluorescent material is dissolved in toluene, the blue-fluorescence toluene solution of a concentration of 1wt.% is made, with the rotating speed of 2300rpm second Spin coating 30 seconds on separation layer (5) obtains blue fluorescent material under a nitrogen atmosphere with 100 watts of 365nm ultra violet lamps 5 minutes Layer.By the polysiloxane emulsion of a concentration of 10wt.% with the rotating speed of 2800rpm spin coating 30 seconds on blue fluorescent material layer, obtain To protective layer.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications, Equivalent substitute mode is should be, is included within the scope of the present invention.

Claims (10)

1. a kind of cross-linking type fluorescent display screen, it is characterised in that:Including be sequentially overlapped substrate, red fluorescence material layer, first Separation layer, green fluorescent material layer, the second separation layer, blue fluorescent material layer and protective layer;
The material of the blue fluorescent material layer, green fluorescent material layer and red fluorescence material layer is cross-linking type phosphor Material.
2. cross-linking type fluorescent display screen according to claim 1, it is characterised in that:It is the blue fluorescent material layer, green The material of color fluorescent material layer and red fluorescence material layer is the main chain conjugated structure that side chain carries crosslinked group.
3. cross-linking type fluorescent display screen according to claim 2, it is characterised in that:
The backbone structure of the material of the blue fluorescent material layer, green fluorescent material layer and red fluorescence material layer is:It is poly- Fluorenes class homopolymer or copolymer, polysilico fluorene class homopolymer or copolymer, polycarbazole class homopolymer or copolymer, polyphenyl class homopolymer Or copolymer, polythiophene class homopolymer or copolymer, small molecule fluorescent material, complex triplet state material, the delay of thermal activities type Fluorescence TADF materials or gathering induced luminescence material;
The crosslinked group is Fluoromar (Ohio Med.), styrene, benzocyclobutane, acrylic acid, siloxanes, cinnamic acid, oxa- ring Butane or anthracene;
The protective layer is transparent high molecular material;
The material of the separation layer is polar macromolecule material or polar macromolecule material and extinction dyestuff, or contains extinction The material of group.
4. cross-linking type fluorescent display screen according to claim 3, it is characterised in that:
The material of the red fluorescence material layer has following any structural formula:
The structural formula of the material of the green fluorescent material layer is as follows:
The structural formula of the material of the blue fluorescent material layer is as follows:
Wherein, R1And R2For the alkyl of C1~C20, Fluoromar (Ohio Med.), styrene, benzocyclobutane, acrylic acid, siloxanes, Chinese cassia tree Acid, oxetanes or anthracene;
But R1And R2It is asynchronously alkyl.
5. cross-linking type fluorescent display screen according to claim 3 or 4, it is characterised in that:The material of second separation layer Material can absorb the light that wavelength is less than 450nm, and the material absorbable wavelength of first separation layer is less than the light of 550nm.
6. cross-linking type fluorescent display screen according to claim 6, it is characterised in that:
The extinction dyestuff is azo dyes, xanthenes class dyestuff or anthraquinone dyes;
The material containing extinction group is the polyimides for including big conjugation group.
7. according to Claims 1 to 4 any one of them cross-linking type fluorescent display screen, it is characterised in that:
The material of the protective layer is polymer and its blend containing siloxanes;
The polarity macromolecule material is polyvinylpyrrolidone, acrylic copolymer, epoxy resin, polyurethane, melamine Polyimide resin or polyimides.
8. according to Claims 1 to 4 any one of them cross-linking type fluorescent display screen, it is characterised in that:
Blue fluorescent material layer, green fluorescent material layer, red fluorescence material layer, the first separation layer and second separation layer Thickness be 10nm~1mm;
Blue fluorescent material layer, green fluorescent material layer, red fluorescence material layer, the first separation layer and second separation layer Flatness be less than respective thickness 5%.
9. the preparation method of claim 1~7 any one of them cross-linking type fluorescent display screen, which is characterized in that including following Step:By red fluorescence material layer, the first separation layer, green fluorescent material layer, the second separation layer, blue fluorescent material layer and guarantor The material of sheath is formed a film on substrate successively by the way of spin coating, pulling film forming, roller coating or vacuum evaporation to get institute The cross-linking type fluorescent display screen stated.
10. the application of claim 1~7 any one of them cross-linking type fluorescent display screen, it is characterised in that:By the cross-linking type Fluorescent display screen is used as the projection screen of laser projection.
CN201810478833.7A 2018-05-18 2018-05-18 Cross-linked fluorescent display screen and preparation method and application thereof Expired - Fee Related CN108597977B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115772341A (en) * 2021-09-06 2023-03-10 牛津大学(苏州)科技有限公司 Coating liquid for forming organic light-emitting layer or photosensitive layer, and method for producing same
WO2024046330A1 (en) * 2022-08-31 2024-03-07 Arovia Hong Kong Limited Silicone projection screen

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Publication number Priority date Publication date Assignee Title
CN102023464A (en) * 2009-09-09 2011-04-20 孙润文 Projection display device and manufacturing method thereof
JP2012220668A (en) * 2011-04-07 2012-11-12 Nec Corp Transmission type screen and rear projection type display device
CN106933018A (en) * 2015-12-28 2017-07-07 中强光电股份有限公司 Projection system and screen thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102023464A (en) * 2009-09-09 2011-04-20 孙润文 Projection display device and manufacturing method thereof
JP2012220668A (en) * 2011-04-07 2012-11-12 Nec Corp Transmission type screen and rear projection type display device
CN106933018A (en) * 2015-12-28 2017-07-07 中强光电股份有限公司 Projection system and screen thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115772341A (en) * 2021-09-06 2023-03-10 牛津大学(苏州)科技有限公司 Coating liquid for forming organic light-emitting layer or photosensitive layer, and method for producing same
WO2024046330A1 (en) * 2022-08-31 2024-03-07 Arovia Hong Kong Limited Silicone projection screen

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