CN113655655A - Wavelength conversion element - Google Patents
Wavelength conversion element Download PDFInfo
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- CN113655655A CN113655655A CN202110514672.4A CN202110514672A CN113655655A CN 113655655 A CN113655655 A CN 113655655A CN 202110514672 A CN202110514672 A CN 202110514672A CN 113655655 A CN113655655 A CN 113655655A
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
Abstract
The invention provides a wavelength conversion element, which comprises an upper water-blocking gas-barrier layer, a lower water-blocking gas-barrier layer and a wavelength conversion layer which is connected between the upper water-blocking gas-barrier layer and the lower water-blocking gas-barrier layer. The upper water-blocking and gas-blocking layer comprises a transparent first polymer base material, a transparent inorganic water-blocking and gas-blocking film, a transparent polymer water-blocking and gas-blocking film, a transparent second polymer base material and a transparent polymer laminating film. The inorganic material water-blocking and air-blocking film and the polymer water-blocking and air-blocking film are coated between the first polymer base material and the second polymer base material. The polymer laminated film is coated on the lower surface of the first polymer substrate. The upper water-blocking gas-barrier layer is attached to the wavelength conversion layer by a polymer attaching film. The water vapor penetration rate of the upper water-blocking and air-blocking layer is 0.01-0.5 g/m2Day. Structure of lower water-resistant and air-resistant layer and structure of upper water-resistant and air-resistant layerThe structure is the same.
Description
Technical Field
The present invention relates to a wavelength conversion device including quantum dots, and more particularly, to a wavelength conversion device including quantum dots, which employs a low-cost inorganic material water/gas barrier film, has a water/gas barrier effect that is not prone to failure.
Background
As is well known, a liquid crystal display system displays an image through a liquid crystal panel. However, since the liquid crystal panel itself does not emit light and the light emitting function must be achieved by a so-called backlight device, the backlight device is an important component of the liquid crystal display device. A wavelength conversion element having a wavelength conversion function is an important element of the backlight device.
At present, the wavelength conversion element with wavelength conversion function of the existing backlight device adopts quantum dots to improve the display quality. Quantum dots are semiconductors in the form of nanocrystals, which can provide alternative displays. The electronic properties of quantum dots are generally determined by the size and shape of the nanocrystals. Quantum dots of the same material, but of different sizes, may emit different colors of light when excited. More specifically, the wavelength at which the quantum dots emit light varies with the size and shape of the quantum dots. In one example, larger quantum dots may emit longer wavelength light (e.g., red light), while smaller quantum dots may emit shorter wavelength light (e.g., blue or violet light). For example, a quantum formed by cadmium selenide (CdSe) can be gradually modulated from a dot emitting in the red region of the visible spectrum from a quantum dot with a diameter of 5nm to a quantum dot with a diameter of 1.5nm emitting in the violet region. By varying the size of the quantum dots, the entire visible wavelength from about 460nm (blue) to about 650nm (red) can be emitted. The quantum dot technology is applied to the liquid crystal display system, can greatly improve the color gamut and the color vividness of the liquid crystal display system, and reduces energy consumption.
In the prior art of wavelength conversion devices including quantum dots, upper and lower water and gas barrier layers are required to be bonded to upper and lower surfaces of a wavelength conversion layer including quantum dots in order to prevent the wavelength conversion layer from contacting air or water vapor. The wavelength conversion layer is formed by coating ultraviolet-curable methyl methacrylate or thermosetting epoxy resin between the upper and lower water-and gas-barrier layers and curing to form a transparent polymer substrate. The quantum dots are uniformly distributed in the transparent polymer substrate. However, the water-blocking gas barrier layer used for the wavelength conversion element including the quantum dots has several problems to be overcome.
First, a general water and gas barrier layer is formed by coating an inorganic material water and gas barrier film such as alumina on one surface of a transparent polymer substrate (for example, a polyethylene terephthalate (PET) substrate). Among various film coating methods, the water and gas barrier layer formed by coating the inorganic material water and gas barrier film by a vacuum sputtering method (sputtering) has water and gas barrier performance meeting the high requirements of the wavelength conversion element containing quantum dots on the water and gas barrier performance. However, the cost of coating the inorganic water-and gas-barrier film by vacuum sputtering is high. The water and gas barrier layer formed by coating the inorganic material water and gas barrier film by Chemical Vapor Deposition (CVD) or Physical Vapor Deposition (PVD) has a low cost, but the water and gas barrier performance is lower than the high requirement of the wavelength conversion device including the quantum dots on the water and gas barrier performance. At present, the water and gas blocking layer of the prior art is mostly coated with an inorganic material water and gas blocking film by using a chemical vapor deposition method or a physical vapor deposition method, and the water and gas blocking efficiency of the whole water and gas blocking layer is improved by using other material layers of the water and gas blocking layer. However, there is still room for great improvement in the overall water and gas barrier performance of such lower cost water and gas barrier layers.
Secondly, during the manufacturing process of the wavelength conversion device including the quantum dots, the water-blocking gas barrier layer is pulled by the roller. If the thickness of the transparent polymer substrate of the water/gas barrier layer is thin (e.g., about ten microns), the water/gas barrier film made of inorganic materials such as aluminum oxide may be damaged during the manufacturing process of the wavelength conversion device including the quantum dots, and the water/gas barrier performance of the water/gas barrier layer may be ineffective. Therefore, the conventional water and gas barrier layer is mostly made of a thick transparent polymer substrate, which can withstand pulling during the manufacturing process of the wavelength conversion device containing quantum dots, so as to prevent the water and gas barrier film made of inorganic materials such as alumina from being damaged. However, there is still room for improvement in the water and gas barrier layers of the prior art in terms of being able to withstand the forces of pulling and to protect the inorganic water and gas barrier film from damage.
Secondly, the use of the upper and lower water and gas barrier layers having a relatively large thickness results in a relatively large thickness of the ultraviolet-curable methyl methacrylate or thermosetting epoxy resin applied between the upper and lower water and gas barrier layers. That is, the wavelength conversion element including quantum dots in the prior art has a very thick thickness, which results in a large amount of material and high cost in manufacturing, and the light attenuation of light passing through the thick wavelength conversion element is also high.
Disclosure of Invention
Therefore, one objective of the present invention is to provide a wavelength conversion device. The wavelength conversion element according to the invention comprises quantum dots, and the water and gas blocking efficiency of the whole water and gas blocking layer is improved by using other material layers of the water and gas blocking layer so as to reach the requirement standard of the current commercial wavelength conversion element comprising the quantum dots on the water and gas blocking efficiency. Moreover, the wavelength conversion element has the advantages that the water-blocking and gas-blocking effects are not easy to lose effectiveness in the manufacturing process, and the thickness of the wavelength conversion element is greatly reduced.
In addition, another technical problem to be solved by the present invention is to provide a wavelength conversion device including quantum dots, which uses a low-cost inorganic material water/gas blocking film, and the overall water/gas blocking performance of the water/gas blocking film meets the current requirement standard of a commercial wavelength conversion device including quantum dots for water/gas blocking performance.
According to a preferred embodiment of the present invention, the wavelength conversion device includes a wavelength conversion layer, an upper water/gas-blocking layer and a lower water/gas-blocking layer. The wavelength conversion layer comprises a transparent first polymer substrate and a plurality of quantum dots. The plurality of quantum dots are uniformly distributed in the first polymer base material. The first polymer substrate has a first upper surface and a first lower surface. The upper water-blocking and air-blocking layer comprises a transparent second polymer base material, a transparent first inorganic material water-blocking and air-blocking film, a transparent first polymer water-blocking and air-blocking film, a transparent third polymer base material and a transparent first polymer laminating film. The second polymer substrate has a second upper surface and a second lower surface. The first inorganic material water-blocking and gas-blocking film is coated on the second upper surface of the second polymer substrate. The first polymer water-and gas-blocking film is coated on the first inorganic material water-and gas-blocking film. The third polymer substrate is bonded to the first polymer water-and gas-blocking film. The first polymer laminated film is coated on the second lower surface of the second polymer substrate. The upper water-blocking and gas-barrier layer is adhered to the second layer by a first polymer adhesive filmA polymer substrate on the first upper surface. The first water vapor penetration rate of the upper water-blocking and gas-blocking layer is 0.01-0.5 g/m2Day. The lower water and gas blocking layer comprises a transparent fourth polymer base material, a transparent second inorganic material water and gas blocking film, a transparent second polymer water and gas blocking film, a transparent fifth polymer base material and a transparent second polymer laminating film. The fourth polymer substrate has a third upper surface and a third lower surface. The second inorganic water-blocking and air-blocking film is coated on the third lower surface of the fourth polymer substrate. The second polymer water-and gas-blocking film is coated on the second inorganic water-and gas-blocking film. The fifth polymer base material is jointed on the second polymer water-resistant and gas-resistant film. The second polymer laminated film is coated on the third upper surface of the fourth polymer substrate. The lower water-blocking gas-barrier layer is attached to the first lower surface of the first polymer substrate by a second polymer attaching film. The second water vapor penetration rate of the lower water-blocking and gas-blocking layer is 0.01-0.5 g/m2Day.
In one embodiment, the first polymer water/gas barrier film and the second polymer water/gas barrier film may be formed of acrylic resin (acrylic resin), polyepoxy resin (polyepoxy resin), polyamine resin (polyamine resin), or a combination thereof.
In one embodiment, the first polymer lamination film and the second polymer lamination film can be respectively formed by soft transparent polymer materials such as polysulfide epoxy resin, polyethyleneimine, methyl methacrylate, polystyrene and the like.
In one embodiment, the first inorganic water-blocking gas-barrier film and the second inorganic water-blocking gas-barrier film may be made of SiCxOy、AlOz、Si3N4And diamond-like carbon, wherein 1<x<2，0<y＜1，1<z<2. The first inorganic material water and gas blocking film and the second inorganic material water and gas blocking film may be formed through chemical vapor deposition or physical vapor deposition, respectively. The third moisture permeability of the first inorganic material water-blocking and gas-blocking film is equal to or more than 0.5g/m2Day. First, theThe fourth moisture permeability of the two inorganic material water-blocking and gas-blocking films is equal to or more than 0.5g/m2Day.
In one embodiment, the first thickness of the second polymer substrate ranges from 12 μm to 25 μm. The second thickness of the first inorganic material water and gas barrier film is in the range of 0.5 μm to 1.5 μm. The third thickness of the first polymer water-blocking and gas-blocking film is 1 μm to 5 μm. The fourth thickness of the third polymer base material ranges from 25 μm to 100 μm. The fifth thickness range of the first polymer laminated film is 0.5 μm to 3 μm. The sixth thickness of the fourth polymer base material ranges from 12 μm to 25 μm. The seventh thickness range of the water-blocking gas-barrier film of the second inorganic material is 0.5 μm to 1.5 μm. The eighth thickness range of the second polymeric water-blocking gas-barrier film is 1 μm to 5 μm. The ninth thickness of the fifth polymer base material ranges from 25 μm to 100 μm. The tenth thickness range of the second polymer laminated film is 0.5 μm to 3 μm.
In one embodiment, the eleventh thickness of the wavelength conversion layer ranges from 20 μm to 50 μm.
In one embodiment, the first polymer laminated film and the second polymer laminated film may be formed of polysulfide epoxy resin, polyethyleneimine, methyl methacrylate, polystyrene, or the like.
In one embodiment, the upper water-blocking gas barrier layer further comprises a first diffusion film. The first diffusion film is coated on the third polymer substrate. The first diffusion film has a first haze ranging from 0% to 50%. The lower water-blocking gas barrier layer further comprises a second diffusion film. The second diffusion film is coated on the fifth polymer substrate. The second diffusion film has a second haze ranging from 0 to 50%.
In one embodiment, the second polymer substrate, the third polymer substrate, the fourth polymer substrate and the fifth polymer substrate may be made of polyethylene terephthalate (PET), polyacrylate (polyacrylate), polystyrene (polystyrene), polyimide (polyimide), polyacrylamide (polyacrylamide), polyethylene (polyethylene), polyvinyl (polyvinyl), poly-diacetylene (poly-diacetylene), polyphenylene-vinylene (polyphenylene-vinylene), polypeptide (polypeptide), and polysaccharide (polysaccharide), polysulfone (polysulfonene), polypyrrole (polypyrole), polyimidazole (polyimidazole), polythiophene (polythiophene), polyether (polyether), epoxy resin (epoxy), silica gel (silica gel), siloxane (siloxane), polyphosphate (polyphosphate), hydrogel (hydrogel), agarose (agarose), cellulose (cellulose) and other soft transparent polymer materials.
In one embodiment, the first polymer substrate may be formed of a transparent polymer material such as uv-curable methyl methacrylate or thermosetting epoxy resin.
Different from the prior art, the wavelength conversion element adopts the low-cost inorganic material water and gas blocking film, the water and gas blocking efficiency of the wavelength conversion element is not easy to lose effectiveness in the manufacturing process, and the thickness of the wavelength conversion element can be greatly reduced.
The advantages and spirit of the present invention can be further understood by the following detailed description of the invention and the accompanying drawings.
Drawings
Fig. 1 is a cross-sectional view of a wavelength converting element according to a preferred embodiment of the present invention.
Description of the reference numerals
1 wavelength conversion element
Wavelength conversion layer
20 first polymer base material
202 first upper surface
204 first lower surface
22 quantum dots
3, upper water-blocking and gas-barrier layer
30 second polymer base material
302 second upper surface
304 second lower surface
32 first inorganic material water-and gas-barrier film
34 first Polymer Water-and gas-Barrier film
36: a third polymer base material
38 first Polymer laminating film
39 first diffusion film
4, lower water-resistant gas barrier layer
40 fourth Polymer base Material
402 third upper surface
404 third lower surface
42 second inorganic material Water-blocking gas-Barrier film
44 second polymer water-resistant and gas-barrier film
46 the fifth Polymer base Material
48 second polymer laminated film
49 second diffusion film
Detailed Description
Referring to fig. 1, fig. 1 schematically shows a structure of a wavelength conversion element 1 according to a preferred embodiment of the present invention in a cross-sectional view.
As shown in fig. 1, the wavelength conversion device 1 according to the preferred embodiment of the present invention includes a wavelength conversion layer 2, an upper water and gas barrier layer 3, and a lower water and gas barrier layer 4.
The wavelength conversion layer 2 includes a transparent first polymer substrate 20 and a plurality of quantum dots 22. The quantum dots 22 are uniformly distributed in the first polymer matrix 20. The first polymer substrate 20 has a first upper surface 202 and a first lower surface 204.
In one embodiment, the plurality of quantum dots 22 may be formed from group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV compounds, or mixtures thereof.
In one embodiment, the group II-VI compounds forming the plurality of quantum dots 22 employed in the present invention can be formed from CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdHgSeS, CdHgSTe, HgZnSeS, HgZnSeTe, or other group II-VI compounds.
In one embodiment, the III-V compound forming the plurality of quantum dots 22 employed in the present invention may be formed of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, GaNP, GaNAs, GaNSb, GaGaGaAs, GaGaSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAS, GaInPSb, GaInNP, InNAs, InNSb, InAlPAs, InAlPSb, or a III-V compound.
In one embodiment, the group IV-VI compounds forming the plurality of quantum dots 22 employed in the present invention may be formed from SnS, SnSe, SnTe, PbS, PbSe, PbTe, SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, SnPbSSe, SnPbSeTe, or other group IV-VI compounds.
In one embodiment, the group IV compound forming the plurality of quantum dots 22 employed in the present invention may be formed of Si, Ge, SiC, SiGe, or other group IV compounds.
The upper water/gas barrier layer 3 includes a transparent second polymer substrate 30, a transparent first inorganic material water/gas barrier film 32, a transparent first polymer water/gas barrier film 34, a transparent third polymer substrate 36, and a transparent first polymer laminating film 38. The second polymer substrate 30 has a second upper surface 302 and a second lower surface 304. The first inorganic material water and gas barrier film 32 is coated on the second upper surface 302 of the second polymer substrate 30.
The first polymeric water and gas barrier film 34 is coated on the first inorganic material water and gas barrier film 32. The third polymer substrate 36 is bonded to the first polymer water/gas barrier film 34. The first polymer lamination film 38 is coated on the second lower surface 304 of the second polymer substrate 30. The upper water-blocking gas barrier layer 3 is bonded to the first upper surface 202 of the first polymer substrate 20 by the first polymer adhesive film 38. Particularly, the first water vapor penetration rate of the upper water-blocking and gas-blocking layer 3 is 0.01-0.5 g/m2Day. It is emphasized that the first inorganic material water and gas barrier film 32 and the first polymeric water and gas barrier film 34 are coated between the second polymeric substrate 30 and the third polymeric substrate 36, thereby forming the wavelength conversion device 1 according to the present inventionThe upper water/gas barrier layer 3 can withstand pulling during the manufacturing process, so as to prevent the first inorganic material water/gas barrier film 32 from being damaged. The upper water-and gas-barrier layer 3 according to the present invention is not liable to lose its water-and gas-barrier effectiveness by itself.
The lower water/gas barrier layer 4 includes a transparent fourth polymer substrate 40, a transparent second inorganic water/gas barrier film 42, a transparent second polymer water/gas barrier film 44, a transparent fifth polymer substrate 46, and a transparent second polymer laminating film 48. The fourth polymer substrate 40 has a third upper surface 402 and a third lower surface 404. A second inorganic water-blocking gas barrier film 42 is coated on the third lower surface 404 of the fourth polymeric substrate 40.
A second polymeric water and gas barrier film 44 is coated over the second inorganic material water and gas barrier film 42. The fifth polymeric substrate 46 is bonded to the second polymeric water and gas barrier film 44. The second polymer laminated film 48 is coated on the third upper surface 402 of the fourth polymer substrate 40. The lower water-blocking gas barrier layer 4 is bonded to the first lower surface 204 of the first polymer substrate 20 by the second polymer adhesive film 48. Particularly, the second water vapor permeability of the lower water-blocking gas barrier layer 4 is 0.01-0.5 g/m2Day g/m2Day. It is emphasized that the second inorganic material water and gas barrier film 42 and the second polymer water and gas barrier film 44 are covered between the fourth polymer substrate 40 and the fifth polymer substrate 46, so that the lower water and gas barrier layer 4 can bear pulling during the manufacturing process of the wavelength conversion device 1 according to the present invention, thereby preventing the second inorganic material water and gas barrier film 42 from being damaged. The water and gas barrier efficacy of the lower water and gas barrier layer 4 according to the present invention is not liable to fail by itself.
In one embodiment, the first inorganic material water/gas barrier film 32 and the second inorganic material water/gas barrier film 42 may be formed of acrylic resin (acrylic resin), polyepoxy resin (polyepoxy resin), polyamine resin (polyamine resin), or a combination thereof.
In one embodiment, the first polymer film 38 and the second polymer film 48 can be formed of a transparent polymer material with adhesive properties such as polysulfide epoxy resin, polyethyleneimine, methyl methacrylate, and polystyrene.
In one embodiment, in particular, the first inorganic material water/gas barrier film 32 and the second inorganic material water/gas barrier film 42 may each be made of SiCxOy、AlOz、Si3N4And diamond-like carbon, wherein 1<x<2，0<y＜1，1<z<2. The first inorganic material water and gas barrier film 32 and the second inorganic material water and gas barrier film 42 may be formed by cvd or pvd to cover the second upper surface 302 of the second polymer substrate 30 and the third lower surface 404 of the fourth polymer substrate 40, respectively. Diamond-like carbon films are hydrocarbon vapor deposited films. Thus, the upper water/gas barrier layer 3 and the lower water/gas barrier layer 4 according to the present invention are inexpensive to manufacture in the first inorganic material water/gas barrier film 32 and the second inorganic material water/gas barrier film 42. However, the overall water and gas barrier performance of the upper water and gas barrier layer 3 and the lower water and gas barrier layer 4 according to the present invention includes high requirements for water and gas barrier performance of the wavelength conversion element of quantum dots. The third moisture permeability of the first inorganic material water and gas barrier film 32 is 0.5g/m or more2Day. The fourth moisture vapor transmission rate of the second inorganic material water-and gas-blocking film 42 is 0.5g/m or more2Day.
In one embodiment, the first thickness of the second polymer substrate 30 is in a range from 12 μm to 25 μm. The second thickness of the first inorganic material water and gas barrier film 32 ranges from 0.5 μm to 1.5 μm. The third thickness of the first polymeric water-and gas-barrier film 34 is in the range of 1 μm to 5 μm. The fourth thickness of the third polymer base material 36 ranges from 25 μm to 100 μm. The fifth thickness range of the first polymer adhesive film 38 is 0.5 μm to 3 μm. The sixth thickness of the fourth polymer base material 40 ranges from 12 μm to 25 μm. The seventh thickness of the second inorganic material water-blocking gas barrier film 42 ranges from 0.5 μm to 1.5 μm. The eighth thickness range of the second polymeric water-and gas-barrier film 44 is 1 μm to 5 μm. The ninth thickness of the fifth polymer base material 46 ranges from 25 μm to 100 μm. The tenth thickness range of the second polymer adhesive film 48 is 0.5 μm to 3 μm. Thus, the wavelength conversion element 1 according to the present invention can be significantly thinned, which brings unexpected effects, and the manufacturing cost is reduced, and the light attenuation of light passing through the wavelength conversion element 1 according to the present invention is also low.
In one embodiment, the eleventh thickness range of the wavelength conversion layer 2 is 20 μm to 50 μm.
In one embodiment, the first polymer laminated film 38 and the second polymer laminated film 48 can be formed of polysulfide epoxy resin, polyethyleneimine, methyl methacrylate, polystyrene, or the like.
In one embodiment, the upper water-blocking gas barrier layer 3 further comprises a first diffusion film 39. The first diffusion film 39 is coated on the third polymer substrate 36. The first diffusion film 39 has a first haze ranging from 0 to 50%. The lower water-blocking gas barrier layer 4 further comprises a second diffusion film 49. The second diffusion film 49 covers the fifth polymer base material 46. The second diffusion film 49 has a second haze ranging from 0 to 50%. The first diffusion film 39 and the second diffusion film 49 may include a plurality of scattering particles. The plurality of scattering particles may comprise a plurality of titanium dioxide particles, a plurality of barium sulfate particles, or a plurality of calcium sulfate particles, or the like. The first diffusion film 39 and the second diffusion film 49 have a thickness of about 1 to 5 μm.
In one embodiment, the second polymer substrate 30, the third polymer substrate 36, the fourth polymer substrate 40 and the fifth polymer substrate 46 may be made of polyethylene terephthalate (PET), polyacrylate (polyacrylate), polystyrene (polystyrene), polyimide (polyimide), polyacrylamide (polyacrylamide), polyethylene (polyethylene), polyvinyl (polyvinyl), poly-diacetylene (poly-diacetylene), polyphenylene-vinylene (polyphenylene-vinylene), polypeptide (polypeptide), and polysaccharide (polysaccharide), polysulfone (polysulfonene), polypyrrole (polypyrole), polyimidazole (polyimidazole), polythiophene (polythiophene), polyether (polyether), epoxy resin (epoxy), silica gel (silica gel), siloxane (siloxane), polyphosphate (polyphosphate), hydrogel (hydrogel), agarose (agarose), cellulose (cellulose) and other soft transparent polymer materials.
In one embodiment, the first polymer substrate 20 may be formed of a transparent polymer material such as uv-curable methyl methacrylate or thermosetting epoxy resin.
It is believed that the present invention will be understood by the detailed description of the preferred embodiment, which is different from the prior art. The wavelength conversion element according to the invention utilizes other material layers of the water and gas blocking layer to improve the overall water and gas blocking performance of the water and gas blocking layer so as to meet the requirement standard of the current commercial wavelength conversion element containing quantum dots on the water and gas blocking performance. Further, the wavelength conversion element according to the present invention employs a low-cost inorganic material water/gas barrier film, the water/gas barrier effect of which is not easily deteriorated during the manufacturing process, and the thickness of which can be made large.
The foregoing detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the scope of the invention to the particular embodiments disclosed. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The invention is, therefore, claimed in the broadest interpretation consistent with the above description so as to encompass all possible variations and equivalent arrangements.
Claims (9)
1. A wavelength converting element comprising:
the wavelength conversion layer comprises a transparent first polymer base material and a plurality of quantum dots, wherein the quantum dots are uniformly distributed in the first polymer base material, and the first polymer base material is provided with a first upper surface and a first lower surface;
an upper water-blocking gas barrier layer comprising:
a transparent second polymer substrate having a second upper surface and a second lower surface;
a transparent first inorganic water and gas blocking film coated on the second upper surface of the second polymer substrate;
a transparent first polymer water and gas barrier film coated on the first inorganic material water and gas barrier film;
a transparent third polymer substrate bonded to the first polymer water-and gas-barrier film; and
a transparent first polymer laminated film coated on the second lower surface of the second polymer substrate, wherein the upper water-and gas-barrier layer is laminated on the first upper surface of the first polymer substrate by the first polymer laminated film, and the first water-and gas-barrier layer has a first water-and-gas penetration rate of 0.01-0.5 g/m2Day; and
a lower water-blocking gas barrier layer comprising:
a transparent fourth polymer substrate having a third upper surface and a third lower surface;
a second transparent inorganic water-and gas-barrier film coated on the third lower surface of the fourth polymer substrate;
a second transparent polymer water and gas barrier film coated on the second inorganic water and gas barrier film;
a fifth transparent polymeric substrate bonded to the second polymeric water-and gas-barrier film; and
a transparent second polymer laminated film coated on the third upper surface of the fourth polymer substrate, wherein the lower water and gas barrier layer is laminated on the first lower surface of the first polymer substrate by the second polymer laminated film, and the second water and gas permeability of the lower water and gas barrier layer is 0.01-0.5 g/m2Day.
2. The wavelength converting element according to claim 1, wherein the first polymeric water-blocking gas-barrier film and the second polymeric water-blocking gas-barrier film are each formed of one selected from the group consisting of acrylic resins, polyepoxy resins, polyamine resins, and combinations thereof.
3. According to claim2, wherein the first inorganic material water and gas blocking film and the second inorganic material water and gas blocking film are respectively made of a material selected from the group consisting of SiCxOy、AlOz、Si3N4And diamond-like carbon, 1<x<2，0<y＜1，1<z<2, the first inorganic material water and gas blocking film and the second inorganic material water and gas blocking film are respectively formed by a chemical vapor deposition method or a physical vapor deposition method, and the third water and gas penetration rate of the first inorganic material water and gas blocking film is equal to or more than 0.5g/m2A fourth water vapor transmission rate of the water and gas barrier film of the second inorganic material of equal to or greater than 0.5g/m2Day.
4. The wavelength converting element of claim 3, wherein the first thickness of the second polymeric substrate is in a range of 12 μm to 25 μm, the second thickness of the first inorganic material water and gas barrier film is in a range of 0.5 μm to 1.5 μm, the third thickness of the first polymeric water and gas barrier film is in a range of 1 μm to 5 μm, the fourth thickness of the third polymeric substrate is in a range of 25 μm to 100 μm, the fifth thickness of the first polymeric conformable film is in a range of 0.5 μm to 3 μm, the sixth thickness of the fourth polymeric substrate is in a range of 12 μm to 25 μm, the seventh thickness of the second inorganic material water and gas barrier film is in a range of 0.5 μm to 1.5 μm, the eighth thickness of the second polymeric water and gas barrier film is in a range of 1 μm to 5 μm, the ninth thickness of the fifth polymeric substrate is in a range of 25 μm to 100 μm, the tenth thickness range of the second polymer laminated film is 0.5 to 3 μm.
5. The wavelength converting element according to claim 4, wherein an eleventh thickness of the wavelength converting layer ranges from 20 μm to 50 μm.
6. The wavelength conversion element according to claim 3, wherein the first polymer laminated film and the second polymer laminated film are each formed of one selected from the group consisting of a polythioepoxy resin, a polyethyleneimine, a methyl methacrylate, and polystyrene.
7. The wavelength converting element according to claim 3, wherein the upper water-blocking gas barrier layer further comprises a first diffusion film coated on the third polymeric substrate, the first diffusion film having a first haze ranging from 50 to 90%, and the lower water-blocking gas barrier layer further comprises a second diffusion film coated on the fifth polymeric substrate, the second diffusion film having a second haze ranging from 0 to 50%.
8. The wavelength conversion element according to claim 3, wherein the second polymer substrate, the third polymer substrate, the fourth polymer substrate, and the fifth polymer substrate are each formed of one selected from the group consisting of polyethylene terephthalate, polyacrylate, polystyrene, polyimide, polyacrylamide, polyethylene, polyvinyl, poly-diacetylene, polyphenylene vinylene, polypeptide, polysaccharide, polysulfone, polypyrrole, polyimidazole, polythiophene, polyether, epoxy resin, silica gel, siloxane, polyphosphate, hydrogel, agarose, and cellulose.
9. The wavelength conversion element according to claim 3, wherein the first polymer base material is formed of ultraviolet-curable methyl methacrylate or a thermosetting epoxy resin.
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| TW202142402A (en) | 2021-11-16 |
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