CN114895385A - Optical protection film for reducing edge diffuse reflection - Google Patents
Optical protection film for reducing edge diffuse reflection Download PDFInfo
- Publication number
- CN114895385A CN114895385A CN202210748277.7A CN202210748277A CN114895385A CN 114895385 A CN114895385 A CN 114895385A CN 202210748277 A CN202210748277 A CN 202210748277A CN 114895385 A CN114895385 A CN 114895385A
- Authority
- CN
- China
- Prior art keywords
- protective film
- layer
- optical protective
- thickness
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 28
- 230000001681 protective effect Effects 0.000 claims abstract description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 19
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 10
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 8
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims abstract description 8
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims abstract description 8
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 8
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 8
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910021389 graphene Inorganic materials 0.000 claims description 11
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 239000006004 Quartz sand Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000010408 film Substances 0.000 description 34
- 239000012788 optical film Substances 0.000 description 7
- 238000001914 filtration Methods 0.000 description 3
- 238000002310 reflectometry Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920006284 nylon film Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/111—Anti-reflection coatings using layers comprising organic materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
Abstract
The invention provides an optical protective film for reducing edge diffuse reflection, which comprises a base layer film, wherein a magnesium fluoride layer, a titanium dioxide layer, a silicon dioxide layer, a zirconium dioxide layer and an aluminum oxide layer are sequentially arranged on the base layer film from inside to outside; the invention adopts an antireflection film which is optimized by multilayer materials, effectively reduces the reflection of the surface of a base layer film and reduces the light attenuation.
Description
Technical Field
The invention belongs to the technical field of film processing, and particularly relates to an optical protective film for reducing edge diffuse reflection.
Background
The film is a thin and soft transparent sheet made of plastic, adhesive, rubber or other materials, and is widely used in various industries such as electronics, machinery, printing, etc., and includes various materials such as optical films, composite films, superconducting films, polyester films, nylon films, plastic films, etc.
The optical film is one of films, the optical film is a kind of optical film which is arranged on the surface of metal or other soft and easily-corroded materials or films, the firmness and the stability of the optical film are improved, the optical film used in the market has higher reflectivity, the light transmittance of the optical film is poor, and when the film with better light transmittance is needed, the market requirement cannot be met.
Disclosure of Invention
1. Objects of the invention
In view of the above technical problems, the present invention provides an optical protective film for reducing edge diffuse reflection, so as to solve the technical problems mentioned in the background art.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows: an optical protective film for reducing edge diffuse reflection comprises a base layer film, wherein a magnesium fluoride layer, a titanium dioxide layer, a silicon dioxide layer, a zirconium dioxide layer and an aluminum oxide layer are sequentially arranged on the base layer film from inside to outside, a permeability-increasing liquid is sprayed on the surface of the aluminum oxide layer, so that the permeability-increasing liquid extends into the base layer film, and after the optical protective film is dried in the air, a graphene layer is arranged on the outer side of the aluminum oxide layer;
the edge of the graphene layer is provided with the filter strip, the filter strip is sprayed with quartz sand, so that the infrared light passing rate of the filter strip is 50% -70%, and the two sides of the filter strip are kept smooth.
Preferably, the thickness of the base layer film is 10 to 20 μm.
Preferably, the thickness of the magnesium fluoride layer is 15 to 20 μm.
Preferably, the thickness of the titanium dioxide layer is 7 to 12 μm.
Preferably, the thickness of the silicon dioxide layer is 5 to 11 μm.
Preferably, the thickness of the zirconium dioxide layer is 6 to 13 μm.
Preferably, the thickness of the aluminum oxide layer is 20 to 35 μm.
Preferably, the thickness of the graphene layer is 50-80 μm.
Preferably, the anti-reflection liquid is prepared by mixing tetraethoxysilane, methyltriethoxysilane and polyvinyl alcohol.
Preferably, the material of the filter strip is a resin film, and the thickness of both surfaces of the filter strip is 1-2 μm.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention adopts the antireflection film which is optimized by multilayer materials, effectively reduces the reflection of light on the surface of the base layer film and reduces the light attenuation.
The antireflection liquid is prepared by mixing tetraethoxysilane, methyltriethoxysilane and polyvinyl alcohol, and organic-inorganic hybridization of tetraethoxysilane, methyltriethoxysilane and polyvinyl alcohol enables the antireflection liquid to be poured into a film, micropores can be generated in a material system, and the antireflection liquid can be effectively reduced in surface refractive index and arrangement of a light filtering strip by coating the antireflection liquid on the surface of the film and performing sand blasting treatment on the surface of the light filtering strip, so that the surface reflectivity of the light filtering strip is low, and the probability of edge reflection is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an optical protective film according to the present invention;
fig. 2 is a schematic diagram of a graphene layer structure according to the present invention.
Reference numerals
1-a base layer film; 2-a magnesium fluoride layer; 3-a titanium dioxide layer; 4-a silicon dioxide layer; 5-a zirconium dioxide layer; 6-an aluminum oxide layer; 7-a graphene layer; 8-light filter strip.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", "coaxial", "bottom", "one end", "top", "other end", "one side", "front", "both ends", "both sides", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "provided," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
Referring to fig. 1-2, the embodiment provides an optical protective film for reducing edge diffuse reflection, which includes a base film 1, where the base film 1 may be a PET film, the base film 1 is sequentially provided with a magnesium fluoride layer 2, a titanium dioxide layer 3, a silicon dioxide layer 4, a zirconium dioxide layer 5, and an aluminum oxide layer 6 from inside to outside, a permeability-increasing liquid is sprayed on the surface of the aluminum oxide layer 6, so that the permeability-increasing liquid extends into the base film 1, the permeability-increasing liquid is formed by mixing ethyl orthosilicate, methyltriethoxysilane, and polyvinyl alcohol, the specific mixing ratio of ethyl orthosilicate, methyltriethoxysilane, and polyvinyl alcohol is 1 (1.2-1.5): (0.7-0.9), and after air drying, a graphene layer 7 is provided on the outer side of the aluminum oxide layer 6;
wherein the antireflection films made of the optimized multilayer materials are bonded together through hot pressing.
The edge of the graphene layer 7 is provided with a filter strip 8, the filter strip 8 is sprayed with quartz sand, so that the infrared light transmittance of the filter strip is 50% -70%, two sides of the filter strip 8 are kept smooth, the filter strip 8 is made of a resin film, and the thickness of the two sides of the filter strip 8 is 1-2 μm.
The thickness of the base layer film 1 is 10-20 microns, the thickness of the magnesium fluoride layer 2 is 15-20 microns, the thickness of the titanium dioxide layer 3 is 7-12 microns, the thickness of the silicon dioxide layer 4 is 5-11 microns, the thickness of the zirconium dioxide layer 5 is 6-13 microns, the thickness of the aluminum oxide layer 6 is 20-35 microns, and the thickness of the graphene layer 7 is 50-80 microns.
Tests show that the reflectivity of the optical protective film prepared by the invention is between 1.2% and 3.1%, so that the antireflection film is formed by optimizing multiple layers of materials, the reflection of light on the surface of a base layer film is effectively reduced, and the light attenuation is reduced.
The above-mentioned embodiments only express a certain implementation mode of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An optical protective film for reducing edge diffuse reflection is characterized by comprising a base layer film, wherein a magnesium fluoride layer, a titanium dioxide layer, a silicon dioxide layer, a zirconium dioxide layer and an aluminum oxide layer are sequentially arranged on the base layer film from inside to outside, a permeability-increasing liquid is sprayed on the surface of the aluminum oxide layer, so that the permeability-increasing liquid extends into the base layer film, and a graphene layer is arranged on the outer side of the aluminum oxide layer after the air drying;
the edge of the graphene layer is provided with the filter strip, the filter strip is sprayed with quartz sand, so that the infrared light passing rate of the filter strip is 50% -70%, and the two sides of the filter strip are kept smooth.
2. An optical protective film according to claim 1, wherein the optical protective film is characterized in that: the thickness of the base layer film is 10-20 μm.
3. An optical protective film according to claim 1, wherein the optical protective film is characterized in that: the thickness of the magnesium fluoride layer is 15-20 mu m.
4. An optical protective film according to claim 1, wherein the optical protective film is characterized in that: the thickness of the titanium dioxide layer is 7-12 μm.
5. An optical protective film according to claim 1, wherein the optical protective film is characterized in that: the thickness of the silicon dioxide layer is 5-11 μm.
6. An optical protective film according to claim 1, wherein the optical protective film is characterized in that: the thickness of the zirconium dioxide layer is 6-13 μm.
7. An optical protective film according to claim 5, wherein: the thickness of the aluminum oxide layer is 20-35 μm.
8. An optical protective film according to claim 1, wherein the optical protective film is characterized in that: the thickness of the graphene layer is 50-80 μm.
9. An optical protective film according to claim 1, wherein the optical protective film is characterized in that: the liquid increasing agent is prepared by mixing ethyl orthosilicate, methyl triethoxysilane and polyvinyl alcohol.
10. An optical protective film according to claim 1, wherein the optical protective film is characterized in that: the material of the filter strip is a resin film, and the thickness of the two surfaces of the filter strip is 1-2 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210748277.7A CN114895385B (en) | 2022-06-29 | 2022-06-29 | Optical protection film for reducing diffuse reflection at edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210748277.7A CN114895385B (en) | 2022-06-29 | 2022-06-29 | Optical protection film for reducing diffuse reflection at edge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114895385A true CN114895385A (en) | 2022-08-12 |
| CN114895385B CN114895385B (en) | 2023-10-31 |
Family
ID=82729566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210748277.7A Active CN114895385B (en) | 2022-06-29 | 2022-06-29 | Optical protection film for reducing diffuse reflection at edge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114895385B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011093133A (en) * | 2009-10-28 | 2011-05-12 | Toppan Printing Co Ltd | Low moisture vapor transmissive hard coat film, polarizing plate, and transmission type liquid crystal display |
| CN103013189A (en) * | 2012-10-12 | 2013-04-03 | 舟山市普陀夏和材料技术有限公司 | Glass anti-reflection coating liquid and application method of glass anti-reflection coating liquid in anti-reflection glass preparation |
| CN103725049A (en) * | 2013-12-03 | 2014-04-16 | 彩虹集团公司 | Preparation method for modified nano silicon dioxide coating liquid |
| CN108383396A (en) * | 2018-02-27 | 2018-08-10 | 张家港外星人新材料科技有限公司 | The double-deck film glass with anti-reflection film and antistatic automatically cleaning film and its preparation method |
| CN208738307U (en) * | 2018-05-31 | 2019-04-12 | 云谷（固安）科技有限公司 | OLED device and display device |
| CN109991690A (en) * | 2019-02-28 | 2019-07-09 | 王周连 | A kind of optical interference coating and the eyeglass comprising it |
| CN111060995A (en) * | 2020-01-13 | 2020-04-24 | 苏州众为光电有限公司 | Antireflection film and optical lens |
| KR20200053329A (en) * | 2018-11-08 | 2020-05-18 | 연세대학교 산학협력단 | A multi-layer film and a method for manufacturing the same |
| CN111362587A (en) * | 2020-04-28 | 2020-07-03 | 东莞南玻太阳能玻璃有限公司 | High-hardness moisture-proof anti-reflection solar glass and preparation method thereof |
| CN113025087A (en) * | 2021-03-04 | 2021-06-25 | 东莞南玻太阳能玻璃有限公司 | Silica sol-doped anti-dazzle anti-reflection coating solution, preparation method and application |
| CN113185134A (en) * | 2021-05-27 | 2021-07-30 | 吴江南玻玻璃有限公司 | Antireflection coating liquid and preparation method and application thereof |
| CN113861475A (en) * | 2021-09-28 | 2021-12-31 | 中国科学技术大学 | Polyester film for optical display and preparation method thereof |
| CN114253426A (en) * | 2021-12-31 | 2022-03-29 | 中航华东光电有限公司 | Method for solving edge reflection of infrared touch pad |
-
2022
- 2022-06-29 CN CN202210748277.7A patent/CN114895385B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011093133A (en) * | 2009-10-28 | 2011-05-12 | Toppan Printing Co Ltd | Low moisture vapor transmissive hard coat film, polarizing plate, and transmission type liquid crystal display |
| CN103013189A (en) * | 2012-10-12 | 2013-04-03 | 舟山市普陀夏和材料技术有限公司 | Glass anti-reflection coating liquid and application method of glass anti-reflection coating liquid in anti-reflection glass preparation |
| CN103725049A (en) * | 2013-12-03 | 2014-04-16 | 彩虹集团公司 | Preparation method for modified nano silicon dioxide coating liquid |
| CN108383396A (en) * | 2018-02-27 | 2018-08-10 | 张家港外星人新材料科技有限公司 | The double-deck film glass with anti-reflection film and antistatic automatically cleaning film and its preparation method |
| CN208738307U (en) * | 2018-05-31 | 2019-04-12 | 云谷（固安）科技有限公司 | OLED device and display device |
| KR20200053329A (en) * | 2018-11-08 | 2020-05-18 | 연세대학교 산학협력단 | A multi-layer film and a method for manufacturing the same |
| CN109991690A (en) * | 2019-02-28 | 2019-07-09 | 王周连 | A kind of optical interference coating and the eyeglass comprising it |
| CN111060995A (en) * | 2020-01-13 | 2020-04-24 | 苏州众为光电有限公司 | Antireflection film and optical lens |
| CN111362587A (en) * | 2020-04-28 | 2020-07-03 | 东莞南玻太阳能玻璃有限公司 | High-hardness moisture-proof anti-reflection solar glass and preparation method thereof |
| CN113025087A (en) * | 2021-03-04 | 2021-06-25 | 东莞南玻太阳能玻璃有限公司 | Silica sol-doped anti-dazzle anti-reflection coating solution, preparation method and application |
| CN113185134A (en) * | 2021-05-27 | 2021-07-30 | 吴江南玻玻璃有限公司 | Antireflection coating liquid and preparation method and application thereof |
| CN113861475A (en) * | 2021-09-28 | 2021-12-31 | 中国科学技术大学 | Polyester film for optical display and preparation method thereof |
| CN114253426A (en) * | 2021-12-31 | 2022-03-29 | 中航华东光电有限公司 | Method for solving edge reflection of infrared touch pad |
Non-Patent Citations (1)
| Title |
|---|
| 朱盛镭编著: "改变汽车的100个黑科技", 机械工业出版社, pages: 129 - 130 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114895385B (en) | 2023-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6584681B2 (en) | Laminated structure | |
| CN101243337B (en) | Protective film for polarizing plate and polarizing plate | |
| JP5935802B2 (en) | Method for producing antiglare film | |
| CN109791222A (en) | Transparent substrate and its manufacturing method with anti-glare and anti-reflective | |
| TW201012642A (en) | Method for producing plastic film-inserted laminated glass and plastic film-inserted laminated glass | |
| CN1272641C (en) | Optical film | |
| CN103730193A (en) | Transparent conductive film and use thereof | |
| JP5598308B2 (en) | Method for producing antireflection film | |
| JP2015043046A (en) | Optical reflection film and optical reflector using the same | |
| EP3904078A1 (en) | Anti-reflective film and production method for same | |
| CN114895385A (en) | Optical protection film for reducing edge diffuse reflection | |
| JP2017090750A (en) | Board with printed layer and display unit using the same | |
| JP6905876B2 (en) | Laminated glass | |
| CN207799124U (en) | A kind of optical imaging element | |
| WO2015194462A1 (en) | Transparent film, printed article, printing device, and printing unit | |
| JP6288666B2 (en) | Hard coat transfer medium | |
| KR102395734B1 (en) | Flexible Cover Window | |
| WO2021187505A1 (en) | Optical laminate, polarizing plate using same, surface plate, and image display device | |
| CN114591673A (en) | Double-sided antistatic LR film, assembly and display device | |
| JP2014177365A (en) | Wind shield for vehicle | |
| WO2021020222A1 (en) | Surface protection panel, multilayer member and image display device each using same, and method for producing surface protection panel | |
| JP2012056041A (en) | Method of cutting adhesive optical filter for display, and method of manufacturing adhesive optical filter for display using this cutting method | |
| JP6683249B2 (en) | Optical reflective film | |
| JP2000052492A (en) | Anti-reflective laminate, optically functional laminate, and display device | |
| JP2007103426A (en) | Long optical filter, single optical filter and method of manufacturing same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |