CN112051686A - Wavelength conversion element - Google Patents
Wavelength conversion element Download PDFInfo
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- CN112051686A CN112051686A CN201910485856.5A CN201910485856A CN112051686A CN 112051686 A CN112051686 A CN 112051686A CN 201910485856 A CN201910485856 A CN 201910485856A CN 112051686 A CN112051686 A CN 112051686A
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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 discloses a wavelength conversion element, which comprises a wavelength conversion layer, a transparent upper gas and water barrier layer and a transparent lower gas and water barrier layer. The wavelength conversion layer comprises a first transparent polymer substrate and a plurality of quantum dots. The transparent upper gas-barrier water-resistant layer comprises a second transparent polymer substrate, a first inorganic material gas-barrier water-resistant film and a first transparent organic material protective film. The transparent upper gas and water barrier layer is jointed on the upper surface of the first transparent polymer substrate by a first transparent organic material protective film. The transparent lower gas-barrier water-resistant layer comprises a second transparent polymer substrate, a second inorganic material gas-barrier water-resistant film and a second transparent organic material protective film. The transparent lower gas and water barrier layer is jointed on the lower surface of the first transparent polymer substrate by a second transparent organic material protective film.
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 is less likely to lose gas and water blocking effects and is thinner.
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 transparent gas and water blocking layers need to be bonded to the upper and lower surfaces of the wavelength conversion layer including quantum dots to block the wavelength conversion layer from contacting air and water vapor. The wavelength conversion layer is formed by coating an ultraviolet-curable methyl methacrylate or a thermosetting epoxy resin between upper and lower transparent gas and water barrier layers and curing the coating to form a transparent polymer base material. The quantum dots are uniformly distributed in the transparent polymer substrate.
A typical transparent gas/water barrier layer is formed by coating an organic or inorganic material such as alumina on one surface of a transparent polymer substrate (e.g., a polyethylene terephthalate (PET) substrate) by Chemical Vapor Deposition (CVD) or Physical Vapor Deposition (PVD). The thickness of the gas and water barrier film made of inorganic material such as alumina is about 1 μm. Most of the prior art transparent gas and water barriers are coated with an adhesion promotion primer film with a thickness of about 1 μm on an inorganic gas and water barrier film such as alumina, so as to facilitate the subsequent bonding with the wavelength conversion layer. In the manufacturing process of the wavelength conversion element including the quantum dots, the transparent gas and water barrier layer is pulled by the roller. If the thickness of the transparent polymer substrate of the transparent gas/water barrier layer is thin (for example, about ten or more micrometers), the gas/water barrier film made of an inorganic material such as alumina is likely to be damaged during the manufacturing process of the wavelength conversion device including the quantum dots, and the gas/water barrier effect of the transparent gas/water barrier layer is likely to be deteriorated. Therefore, the conventional transparent gas and water 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 damage of the gas and water barrier film made of inorganic materials such as alumina. The thickness of the transparent gas-barrier water-resistant layer in the prior art is about 50-100 μm.
However, the use of the upper and lower transparent gas and water barrier layers having a relatively large thickness results in a thickness of the ultraviolet-curable methyl methacrylate or the thermosetting epoxy resin applied between the upper and lower transparent gas and water barrier layers being increased to about 100 μm. That is, the wavelength conversion device including quantum dots in the prior art has a very thick thickness of about 200 to 300 μm, which results in a large amount of material consumption and high cost in manufacturing, and the light attenuation of light passing through the thick wavelength conversion device 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 present invention includes quantum dots, and its own gas and water blocking effect is not easily lost during the manufacturing process, and its own thickness is also greatly reduced.
According to a preferred embodiment of the present invention, the wavelength conversion device comprises a wavelength conversion layer, a transparent upper gas and water barrier layer and a transparent lower gas and water barrier layer. The wavelength conversion layer comprises a first transparent polymer substrate and a plurality of quantum dots. The plurality of quantum dots are uniformly distributed in the first transparent polymer substrate. The first transparent polymer substrate has a first upper surface and a first lower surface. The transparent upper gas-barrier water-resistant layer comprises a second transparent polymer substrate, a first inorganic material gas-barrier water-resistant film and a first transparent organic material protective film. The second transparent polymer substrate has a second upper surface and a second lower surface. The first inorganic material gas-barrier water-blocking film is coated on the second lower surface of the second transparent polymer substrate. The first inorganic material gas and water blocking film has a first thickness in a range of 0.5 μm to 1.5 μm. The first transparent organic material protective film is coated on the second transparent polymer substrate. The first transparent organic material protective film has a second thickness ranging from 0.5 μm to 3 μm. The transparent upper gas and water barrier layer is jointed on the first upper surface of the first transparent polymer substrate by a first transparent organic material protective film. The transparent lower gas-barrier water-resistant layer comprises a third transparent polymer substrate, a second inorganic material gas-barrier water-resistant film and a second transparent organic material protective film. The third transparent polymer substrate has a third upper surface and a third lower surface. The second inorganic material gas-barrier water-blocking film is coated on the third upper surface of the third transparent polymer substrate. The second inorganic material gas and water barrier film has a third thickness in the range of 0.5 μm to 1.5 μm. The second transparent organic material protective film is coated on the third transparent high molecular base material. The second transparent organic material protective film has a fourth thickness ranging from 0.5 μm to 3 μm. The transparent lower gas and water barrier layer is jointed on the lower surface of the first transparent polymer substrate by a second transparent organic material protective film.
In one embodiment, the first transparent organic material protective film and the second transparent organic material protective film may be respectively formed of a flexible transparent polymer material such as polysulfide epoxy resin, polyethyleneimine, methyl methacrylate, polystyrene, and the like.
In one embodiment, the first transparent organic material protective film may be a first organic material gas-barrier water-blocking film, such that the transparent upper gas-barrier water-blocking layer has a first water vapor transmission rate ranging from 0.1 to 0.05g/m2Day. The second transparent organic material protective film can be a second organic material gas-barrier water-blocking film, so that the transparent lower gas-barrier water-blocking layer has a second water vapor permeability range of 0.1-0.05 g/m2Day.
In one embodiment, the first inorganic material gas and water blocking film and the second inorganic material gas and water blocking film may be made of SiCxOy、AlOzDiamond-like carbon, etcInorganic material, wherein 1<x<2，0<y＜1，1<z<2。
In one embodiment, the transparent upper gas and water barrier layer further comprises a first diffusion film. The first diffusion film is coated on the second upper surface of the second transparent polymer substrate. The first diffusion film has a first haze ranging from 50% to 90%. The transparent lower gas and water barrier layer further comprises a second diffusion film. The second diffusion film is coated on the third lower surface of the third transparent polymer substrate. The second diffusion film has a second haze ranging from 0 to 50%.
In one embodiment, the second transparent polymer substrate and the third transparent 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), polysaccharide (polysaccharide), polysulfone (polysulfone), polypyrrole (polypyrrole), polyimidazole (polyimidazole), polythiophene (polythiophene), polyether (polyether), epoxy resin (epoxy), silica gel (silica gel), silicone (silicone), polyphosphate (polyphosphate), agarose (agarose), or other transparent polymer materials.
In one embodiment, the second transparent polymer substrate has a fifth thickness in the range of 12 μm to 25 μm. The third transparent polymer substrate has a sixth thickness ranging from 12 μm to 25 μm.
In one embodiment, the first transparent polymer substrate may be formed of a transparent polymer material such as uv-curable methyl methacrylate or thermosetting epoxy resin.
In one embodiment, the wavelength conversion layer has a seventh thickness in a range of 20 μm to 50 μm.
In one embodiment, the transparent upper gas and water barrier layer further comprises a first adhesion promoting primer film. The first adhesion promotion primer film is coated between the first inorganic material gas and water blocking film and the first transparent organic material protective film. The transparent lower gas and water barrier layer further comprises a second adhesion promoting primer film. The second adhesion promotion primer film is coated between the second inorganic material gas and water blocking film and the second transparent organic material protective film.
Different from the prior art, the wavelength conversion element has the advantages that the gas and water resistance effect 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;
fig. 2 is a cross-sectional view of a variation of the wavelength converting element according to the preferred embodiment of the present invention.
Description of the reference numerals
1: wavelength conversion element
2: wavelength conversion layer
20: a first transparent polymer substrate
202: a first upper surface
204: a first lower surface
22: quantum dots
3: transparent upper gas and water barrier
30: second transparent polymer substrate
302: second upper surface
304: second lower surface
32: first inorganic material gas-barrier water-blocking film
34: a first transparent organic material protective film
36: a first diffusion film
38: first adhesion promoting primer film
4: transparent lower gas and water barrier
40: third transparent polymer base material
402: third upper surface
404: third lower surface
42: second inorganic material gas-barrier water-blocking film
44: second transparent organic material protective film
46: second diffusion film
48: second adhesion promoting primer film
Detailed Description
Referring to fig. 1 and 2, fig. 1 is a cross-sectional view schematically showing the structure of a wavelength conversion device 1 according to a preferred embodiment of the present invention. Fig. 2 is a structure schematically showing a variation of the wavelength converting element 1 according to the preferred embodiment of the present invention in a cross-sectional view.
As shown in fig. 1, the wavelength conversion element 1 according to the preferred embodiment of the present invention includes a wavelength conversion layer 2, a transparent upper gas and water barrier layer 3, and a transparent lower gas and water barrier layer 4.
The wavelength conversion layer 2 includes a first transparent polymer substrate 20 and a plurality of quantum dots 22. The quantum dots 22 are uniformly distributed in the first transparent polymer substrate 20. The first transparent 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 from 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 III-V compounds.
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 a particular embodiment, the group IV compound forming the plurality of quantum dots 22 employed in the present invention may be formed from Si, Ge, SiC, SiGe, or other group IV compounds.
The transparent upper gas-barrier water-resistant layer 3 comprises a second transparent polymer substrate 30, a first inorganic material gas-barrier water-resistant film 32 and a first transparent organic material protective film 34. The second transparent polymer substrate 30 has a second upper surface 302 and a second lower surface 304. The first inorganic material gas and water barrier film 32 is coated on the second lower surface 304 of the second transparent polymer substrate 30. The first inorganic material gas and water blocking film 32 has a first thickness in the range of 0.5 μm to 1.5 μm. A first protective film 34 of transparent organic material is coated over the first gas and water barrier film 32 of inorganic material. The first transparent organic material protective film 34 has a second thickness ranging from 0.5 μm to 3 μm. The transparent upper gas barrier and water barrier layer 3 is bonded to the first upper surface 202 of the first transparent polymer substrate 20 with a first transparent organic material protective film 34.
The transparent lower gas/water barrier layer 4 includes a third transparent polymer substrate 40, a second inorganic gas/water barrier film 42, and a second transparent organic protective film 44. The third transparent polymer substrate 40 has a third upper surface 402 and a third lower surface 404. The second inorganic material gas-barrier water-blocking film 42 is coated on the third upper surface 402 of the third transparent polymer substrate 40. The second inorganic material gas and water barrier film 42 has a third thickness in the range of 0.5 μm to 1.5 μm. A second protective film 44 of transparent organic material is coated over the second gas and water barrier film 42 of inorganic material. The second transparent organic material protective film 44 has a fourth thickness ranging from 0.5 μm to 3 μm. The transparent lower gas/water barrier layer 4 is bonded to the first lower surface 204 of the first transparent polymer substrate 20 with the second transparent organic material protective film 44. The first inorganic material gas and water blocking film 32 is protected by the first transparent organic material protective film 34, and the second inorganic material gas and water blocking film 42 is protected by the second transparent organic material protective film 44, so that the first inorganic material gas and water blocking film 32 and the second inorganic material gas and water blocking film 42 are not damaged during the manufacturing process of the wavelength conversion element 1 according to the present invention, and the gas and water blocking effect of the wavelength conversion element 1 itself according to the present invention is not easily lost.
In one embodiment, the first inorganic material gas and water barrier film 32 and the second inorganic material gas and water barrier film 42 may each be made of SiCxOy、AlOzAnd diamond-like carbon, wherein 1<x<2，0<y＜1，1<z<2. The first inorganic material gas/water blocking film 32 and the second inorganic material gas/water blocking film 42 may be formed by chemical vapor deposition or physical vapor deposition to cover the second lower surface 304 of the second transparent polymer substrate 30 and the third upper surface 402 of the third transparent polymer substrate 40, respectively. Diamond-like carbon films are hydrocarbon vapor deposited films.
In one embodiment, the second transparent polymer substrate 30 and the third transparent polymer substrate 40 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), polysaccharide (polysaccharide), polysulfone (polysulfone), polypyrrole (polypyrrole), polyimidazole (polyimidazolate), polythiophene (polythiophene), polyether (polyether), epoxy resin (epoxy), silica gel (silica gel), silicone (silicone), polyphosphate (polyphosphate), agarose (agarose), or a polymer hydrogel, or a polymer material such as agarose (hydrogel).
In one embodiment, the first transparent organic material protective film 34 and the second transparent organic material protective film 44 may be respectively formed of a flexible transparent polymer material such as polysulfide epoxy resin, polyethyleneimine, methyl methacrylate, polystyrene, and the like.
In one embodiment, the protective film 34 of the denser first transparent organic material may be formed as a first organic material gas and water barrier film. In one example, if the first transparent organic material protective film 34 of the transparent upper gas/water barrier layer 3 has no gas/water barrier effect, the water vapor transmission rate of the transparent upper gas/water barrier layer 3 is about 0.3g/m2Day. If the first transparent organic material protective film 34 of the transparent upper gas/water barrier layer 3 can be used as the first organic material gas/water barrier film, the water vapor transmission rate of the transparent upper gas/water barrier layer 3 is reduced to 0.1-0.05 g/m2Day. Likewise, the protective film 44 of a second, denser transparent organic material may be formed as a gas and water barrier film of a second organic material. If the second transparent organic material protective film 44 of the transparent upper gas/water barrier layer 3 has no gas/water barrier effect, the water vapor transmission rate of the transparent lower gas/water barrier layer 4 is about 0.3g/m2Day. If the second transparent organic material protective film 44 of the transparent lower gas/water barrier layer 4 can be used as a second organic material gas/water barrier film, the water vapor transmission rate of the transparent lower gas/water barrier layer 4 is reduced to 0.1-0.05 g/m2Day.
In one embodiment, as shown in fig. 2, the transparent upper gas and water barrier layer 3 further comprises a first diffusion film 36. The first diffusion film 36 is coated on the second upper surface 302 of the second transparent polymer substrate 30. The first diffusion film 36 has a first haze ranging from 50% to 90%. The transparent lower gas and water barrier layer 4 further comprises a second diffusion film 46. The second diffusion film 46 is coated on the third bottom surface 404 of the third transparent polymer substrate 40. The second diffusion film 46 has a second haze ranging from 0 to 50%. The first diffusion film 36 and the second diffusion film 46 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 36 and the second diffusion film 46 have a thickness of about 1 to 5 μm. The components in fig. 2 having the same reference numerals as those in fig. 1 have the same or similar structures and functions, and are not repeated herein.
In one embodiment, the second transparent polymer substrate 30 has a fifth thickness ranging from 12 μm to 25 μm, such that the thickness of the transparent upper gas/water barrier layer 3 ranges from 13 μm to 29.5 μm. The third transparent polymer substrate 40 has a sixth thickness ranging from 12 μm to 25 μm so that the thickness of the transparent lower gas and water barrier layer 4 ranges from 13 μm to 29.5 μm.
In one embodiment, the first transparent polymer substrate 20 is formed by coating ultraviolet curable methyl methacrylate or thermosetting epoxy resin between the transparent upper gas/water barrier layer 3 and the transparent lower gas/water barrier layer 4, and curing to form the first transparent polymer substrate 20. Since the upper gas and water barrier layer 3 and the transparent lower gas and water barrier layer 4 are thin enough, the wavelength conversion layer 2 can be thinned to a thickness ranging from 20 μm to 50 μm. It should be emphasized that the conventional wavelength conversion device has a very thick thickness (about 200 to 300 μm) due to its structure factor and cannot be thinned. Compared with the wavelength conversion element in the prior art, the wavelength conversion element 1 can be greatly thinned due to the different structure, and the thickness of the wavelength conversion element 1 can be reduced to 46 μm to 109 μm. Since the wavelength conversion element 1 according to the present invention is itself significantly thinned, with the consequent unexpected efficacy, less material is consumed in manufacturing, the 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, as also shown in fig. 2, the transparent upper gas and water barrier layer 3 further comprises a first adhesion promoting primer film 38. The first adhesion promoting primer film 38 is coated between the first inorganic material gas/water blocking film 32 and the first transparent organic material protective film 34. The transparent lower gas and water barrier layer 4 further comprises a second adhesion promoting primer film 48. A second adhesion promoting primer film 48 is coated between the second inorganic material gas and water blocking film 42 and the second transparent organic material protective film 44.
In one embodiment, the first adhesion promoting primer film 38 and the second adhesion promoting primer film 48 may be formed of a polymer material such as aminosilane (aminosilane) or polyethyleneimine (polyethyleneimine) that can improve the surface adhesion of the first inorganic material gas/water barrier film 32 and the second inorganic material gas/water barrier film 42. The thickness of the first adhesion promoting primer film 38 and the second adhesion promoting primer film 48 is about 0.5 to 1.5 μm.
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 has the gas and water blocking effect, is not easy to lose effectiveness in the manufacturing process, and can be greatly reduced in thickness.
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, to be understood in the appended claims as broadly as possible and as an equivalent arrangement to cover all possible variations.
Claims (10)
1. A wavelength converting element comprising:
the wavelength conversion layer comprises a first transparent polymer base material and a plurality of quantum dots, wherein the quantum dots are uniformly distributed in the first transparent polymer base material, and the first transparent polymer base material is provided with a first upper surface and a first lower surface;
a transparent upper gas and water barrier comprising:
a second transparent polymer substrate having a second upper surface and a second lower surface;
a first inorganic material gas and water blocking film coated on the second lower surface of the second transparent polymer substrate, the first inorganic material gas and water blocking film having a first thickness ranging from 0.5 μm to 1.5 μm; and
a first transparent organic material protective film coated on the first inorganic material gas/water blocking film, the first transparent organic material protective film having a second thickness ranging from 0.5 μm to 3 μm, wherein the transparent upper gas/water blocking layer is bonded on the first upper surface of the first transparent polymer substrate with the first transparent organic material protective film; and
a clear lower gas and water barrier comprising:
a third transparent polymer substrate having a third upper surface and a third lower surface;
a second inorganic material gas and water barrier film coated on the third upper surface of the third transparent polymer substrate, the second inorganic material gas and water barrier film having a third thickness ranging from 0.5 μm to 1.5 μm; and
a second transparent organic material protective film coated on the second inorganic material gas and water blocking film, the second transparent organic material protective film having a fourth thickness ranging from 0.5 μm to 3 μm, wherein the transparent lower gas and water blocking layer is bonded to the first lower surface of the first transparent polymer substrate with the second transparent organic material protective film.
2. The wavelength converting element according to claim 1, wherein the first transparent organic material protective film and the second transparent organic material protective film are each formed of one selected from the group consisting of polythioepoxy, polyethyleneimine, methyl methacrylate, and polystyrene.
3. The wavelength converting element according to claim 2, wherein the first transparent organic material protective film is a first organic material gas/water blocking film such that the transparent upper gas/water blocking layer has a first water vapor transmittance in a range of 0.1 to 0.05g/m 2-day, and the second transparent organic material protective film is a second organic material gas/water blocking film such that the transparent lower gas/water blocking layer has a second water vapor transmittance in a range of 0.1 to 0.05g/m 2-day.
4. The wavelength converting element of claim 2, wherein the first inorganic material gas and water blocking film and the second inorganic material gas and water blocking film are each formed of one selected from the group consisting of SiCxOy, AlOz, and diamond-like carbon, 1< x <2, 0< y < 1, 1< z < 2.
5. The wavelength converting element according to claim 4, wherein the transparent upper gas barrier and water barrier layer further comprises a first diffusion film coated on the second upper surface of the second transparent polymer substrate, the first diffusion film having a first haze ranging from 50 to 90%, the transparent lower gas barrier and water barrier layer further comprises a second diffusion film coated on the third lower surface of the third transparent polymer substrate, the second diffusion film having a second haze ranging from 0 to 50%.
6. The wavelength conversion element according to claim 5, wherein the second transparent polymer substrate and the third transparent 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, silica gel, siloxane, polyphosphate, hydrogel, agarose, and cellulose.
7. The wavelength converting element according to claim 6, wherein the second transparent polymeric substrate has a fifth thickness ranging from 12 μ ι η to 25 μ ι η and the third transparent polymeric substrate has a sixth thickness ranging from 12 μ ι η to 25 μ ι η.
8. The wavelength conversion element according to claim 7, wherein the first transparent polymer substrate is formed of ultraviolet-curable methyl methacrylate or thermosetting epoxy resin.
9. The wavelength converting element according to claim 8, wherein the wavelength converting layer has a seventh thickness ranging from 20 μ ι η to 50 μ ι η.
10. The wavelength converting element according to claim 9, wherein the transparent upper gas-and water-blocking layer further comprises a first adhesion promoting primer film coated between the first inorganic material gas-and water-blocking film and the first transparent organic material protective film, and the transparent lower gas-and water-blocking layer further comprises a second adhesion promoting primer film coated between the second inorganic material gas-and water-blocking film and the second transparent organic material protective film.
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Application publication date: 20201208 |