WO2013061729A1 - 液晶素子及び液晶素子用セル - Google Patents
液晶素子及び液晶素子用セル Download PDFInfo
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- WO2013061729A1 WO2013061729A1 PCT/JP2012/075367 JP2012075367W WO2013061729A1 WO 2013061729 A1 WO2013061729 A1 WO 2013061729A1 JP 2012075367 W JP2012075367 W JP 2012075367W WO 2013061729 A1 WO2013061729 A1 WO 2013061729A1
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- liquid crystal
- layer
- oxide
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- dielectric layer
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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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
-
- 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
-
- 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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
- G02F1/294—Variable focal length devices
Definitions
- the present invention relates to a liquid crystal element and a cell for a liquid crystal element.
- liquid crystal elements such as liquid crystal lenses having a variable refractive index have been proposed.
- a liquid crystal element to lower the driving voltage.
- a transparent insulating layer is disposed between the electrode and the liquid crystal layer, and a high resistance layer is disposed on the surface of the transparent insulating layer facing the liquid crystal layer.
- Liquid crystal lenses have been proposed.
- the driving voltage of the liquid crystal lens can be lowered by providing a high resistance layer.
- the main object of the present invention is to provide a liquid crystal element having a low driving voltage and a high response speed.
- the liquid crystal element according to the present invention includes a liquid crystal layer, first and second electrodes, a high resistance layer, and an inorganic dielectric layer.
- the first and second electrodes apply a voltage to the liquid crystal layer.
- the high resistance layer is disposed between one of the first and second electrodes and the liquid crystal layer.
- the inorganic dielectric layer is disposed between the high resistance layer and the liquid crystal layer.
- the “high resistance layer” means an electric resistance value of 1 ⁇ 10 4 ⁇ / ⁇ to 1 ⁇ 10 14 ⁇ / ⁇ in surface resistance, which is higher than those of the first and second electrodes, and is an inorganic dielectric.
- the liquid crystal element according to the present invention further includes at least one intermediate plate that is disposed in the liquid crystal layer and divides the liquid crystal layer in the thickness direction.
- the inorganic dielectric layer is preferably composed of at least one of an inorganic oxide dielectric layer and an inorganic fluoride dielectric layer.
- the inorganic oxide dielectric layer preferably contains at least one of silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, niobium oxide and zirconium oxide.
- the inorganic fluoride dielectric layer preferably contains magnesium fluoride.
- the high resistance layer is made of zinc oxide, aluminum zinc oxide, indium tin oxide, antimony tin oxide, gallium zinc oxide, silicon zinc oxide, tin zinc oxide, boron zinc oxide and germanium zinc oxide. It is preferable to include at least one kind.
- the cell for a liquid crystal element according to the present invention is a cell that becomes a liquid crystal element by injecting liquid crystal.
- the cell for a liquid crystal element according to the present invention includes a space for forming a liquid crystal layer, first and second electrodes, a high resistance layer, and an inorganic dielectric layer.
- the high resistance layer is disposed between one of the first and second electrodes and the space.
- the inorganic dielectric layer is disposed between the high resistance layer and the space.
- FIG. 1 is a schematic cross-sectional view of the liquid crystal lens according to the first embodiment.
- FIG. 2 is a schematic plan view of the first electrode in the first embodiment.
- FIG. 3 is a schematic cross-sectional view of the liquid crystal lens according to the second embodiment.
- FIG. 4 is a wavefront aberration immediately after the manufacture of the liquid crystal element manufactured in the example.
- FIG. 5 shows wavefront aberrations after 180 days from the manufacture of the liquid crystal element manufactured in the example.
- FIG. 6 is a wavefront aberration immediately after manufacturing the liquid crystal element manufactured in the comparative example.
- FIG. 7 shows wavefront aberrations after 180 days from the manufacture of the liquid crystal element manufactured in the comparative example.
- FIG. 1 is a schematic cross-sectional view of a liquid crystal element 1 according to the first embodiment.
- the liquid crystal element 1 is a liquid crystal lens.
- the liquid crystal element 1 includes a liquid crystal layer 11 containing liquid crystal molecules.
- the liquid crystal layer 11 is sandwiched between the first and second electrodes 21 and 22.
- a voltage is applied to the liquid crystal layer 11 by the first and second electrodes 21 and 22, whereby the refractive index of the liquid crystal element 1 changes.
- the liquid crystal element 1 includes a first substrate 31 and a second substrate 32 arranged to face each other with a space therebetween.
- a partition wall member 34 is disposed between the first substrate 31 and the second substrate 32.
- the liquid crystal layer 11 is provided in a space defined by the partition member 34 and the first and second substrates 31 and 32.
- At least one intermediate plate 33 is disposed between the first substrate 31 and the second substrate 32. Specifically, in the present embodiment, one intermediate plate 33 is provided.
- the intermediate plate 33 divides the liquid crystal layer 11 into a first liquid crystal layer 11a and a second liquid crystal layer 11b along the thickness direction z.
- the first substrate 31, the second substrate 32, the intermediate plate 33, and the partition member 34 can be made of glass, for example.
- the intermediate plate 33 may be provided with a communication port that allows the first liquid crystal layer 11a and the second liquid crystal layer 11b to communicate with each other. By doing so, pressure variation between the first liquid crystal layer 11a and the second liquid crystal layer 11b can be reduced.
- An injection port for injecting liquid crystal may be provided in at least one of the first and second substrates 31 and 32, or may be provided in the partition wall member 34.
- the thickness of the first substrate 31 and the second substrate 32 can be, for example, about 0.1 mm to 1.0 mm.
- the thickness of the intermediate plate 33 can be set to about 5 ⁇ m to 80 ⁇ m, for example.
- the thickness of the partition member 34 can be appropriately set according to the thickness of the liquid crystal layers 11a and 11b determined by the optical power to be obtained, the response speed required for the liquid crystal layers 11a and 11b, and the like.
- the thickness of the partition member 34 can be set to, for example, about 10 ⁇ m to 80 ⁇ m.
- the first electrode 21 is disposed on the surface 31 a of the first substrate 31 on the liquid crystal layer 11 side.
- the second electrode 22 is disposed so as to face the first electrode 21 with the liquid crystal layer 11 interposed therebetween.
- the first and second electrodes 21 and 22 can be made of a transparent conductive oxide such as indium tin oxide (ITO), for example.
- the first electrode 21 includes a first electrode portion 21a having a circular opening 21a1 and a circular second electrode portion 21b disposed inside the opening 21a1 of the first electrode portion 21a.
- the second electrode 22 is provided in a planar shape so as to face the first and second electrode portions 21a and 21b.
- the voltage V 1 is applied between the first electrode portion 21 a of the first electrode 21 and the second electrode 22.
- a voltage V ⁇ b> 2 is applied between the second electrode portion 21 b of the first electrode 21 and the second electrode 22.
- the second electrode 22 is a ground electrode having a potential of 0V. Therefore, in the present embodiment, of the first and second electrodes 21 and 22, the electrode having the larger absolute value of the potential generated when a voltage is applied is the first electrode 21.
- An insulating layer that insulates the high resistance layer 41 from the first electrode 21 is preferably provided between the high resistance layer 41 and the first electrode 21.
- the insulating layer can be made of, for example, silicon oxide or silicon nitride.
- the high resistance layer 41 is made of zinc oxide, aluminum zinc oxide, indium tin oxide, antimony tin oxide, gallium zinc oxide, silicon zinc oxide, tin zinc oxide, boron zinc oxide, and germanium zinc oxide. It is preferable to include at least one of them.
- the high resistance layer 41 may be comprised by the single high resistance layer, and may be comprised by the laminated body of several high resistance layers.
- the high resistance layer 41 is configured by a laminate of a plurality of high resistance layers, the plurality of high resistance layers may be made of the same material or different materials. It may be.
- the thickness of the high resistance layer 41 is preferably 10 nm to 300 nm, for example.
- An inorganic dielectric layer 42 is disposed between the high resistance layer 41 and the liquid crystal layer 11.
- the inorganic dielectric layer 42 covers substantially the entire high resistance layer 41.
- an alignment film is disposed between the inorganic dielectric layer 42 and the liquid crystal layer 11a.
- the inorganic dielectric layer 42 is covered with this alignment film.
- an alignment film is disposed between the second electrode 22 and the liquid crystal layer 11b so as to cover the second electrode 22.
- An alignment film is also disposed on both surfaces of the intermediate plate 33. These alignment films align the liquid crystal molecules in the liquid crystal layer 11.
- the alignment film can be composed of, for example, a rubbed polyimide film.
- the inorganic dielectric layer 42 is preferably composed of at least one of an inorganic oxide dielectric layer and an inorganic fluoride dielectric layer.
- the inorganic oxide dielectric layer preferably contains at least one of silicon oxide, aluminum oxide, titanium oxide, tantalum oxide, niobium oxide and zirconium oxide.
- the inorganic fluoride dielectric layer preferably contains magnesium fluoride.
- the inorganic dielectric layer 42 may be composed of a single dielectric layer or a laminate of a plurality of dielectric layers.
- the plurality of dielectric layers may be made of the same material or different materials. It may be.
- the thickness of the inorganic dielectric layer 42 is preferably about 1 nm to 2 ⁇ m, and more preferably about 100 nm to 1.5 ⁇ m.
- the high resistance layer 41 is disposed between the first electrode 21 and the liquid crystal layer 11. For this reason, a low drive voltage is realizable.
- the inorganic dielectric layer 42 is disposed between the high resistance layer 41 and the liquid crystal layer 11, and the high resistance layer 41 and the liquid crystal layer 11 are isolated. For this reason, high-speed response can be realized.
- the refractive index of the liquid crystal element is changed when the applied voltage between the first and second electrodes is changed by a predetermined voltage. The time required for the change was about 4 to 5 seconds. On the other hand, in the liquid crystal element 1, it was about 0.1 seconds to 0.5 seconds. From this result, it can be seen that by providing the inorganic dielectric layer 42, for example, the response speed can be increased to several tens of times.
- the high resistance layer 41 is provided between the first electrode 21 and the liquid crystal layer 11, and the inorganic dielectric layer 42 is provided between the high resistance layer 41 and the liquid crystal layer 11.
- the liquid crystal element 1 having a low drive voltage and a fast response speed can be realized.
- the electric field distribution changes, and the alignment of the liquid crystal molecules in the liquid crystal layer 11 changes accordingly.
- the dielectric constant of the liquid crystal layer 11 changes.
- the inorganic dielectric layer 42 is not provided, the high-resistance layer, which is a conductor, and the liquid crystal layer are in contact with each other, so that the change in electric field distribution is slow. As a result, the orientation of the liquid crystal molecules in the liquid crystal layer gradually changes.
- the inorganic dielectric layer in the liquid crystal layer, the change in the orientation of the liquid crystal molecules accompanying the change in the electric field distribution gradually occurs, so that the voltage between the first electrode and the second electrode is increased. It is considered that the response speed of the liquid crystal element becomes slow when the value is changed.
- the high resistance layer 41 and the liquid crystal layer 11 are isolated by the inorganic dielectric layer 42.
- the liquid crystal layer 11 is in contact with an inorganic dielectric layer 42 that is not a conductor. For this reason, even if the orientation of the liquid crystal molecules in the liquid crystal layer 11 changes and the dielectric constant of the liquid crystal layer 11 changes, it is considered that the change in the electric field distribution is fast. As a result, the orientation of the liquid crystal molecules in the liquid crystal layer changes immediately.
- the inorganic dielectric layer is provided, in the liquid crystal layer, the change in the orientation of the liquid crystal molecules accompanying the change in the electric field distribution occurs immediately, so that the voltage between the first electrode and the second electrode is increased. It is considered that the response speed of the liquid crystal element is increased when the value is changed.
- the inorganic dielectric layer 42 by disposing the inorganic dielectric layer 42 so as to cover the high resistance layer 41, it is possible to suppress a change in electric resistance of the high resistance layer 41 with time. Accordingly, it is possible to suppress changes over time in characteristics such as the driving voltage of the liquid crystal element 1.
- FIG. 4 shows the wavefront aberration immediately after the manufacture of the liquid crystal element manufactured in the example.
- FIG. 5 shows wavefront aberrations after 180 days from the manufacture of the liquid crystal element manufactured in the example.
- FIG. 6 is a wavefront aberration immediately after manufacturing the liquid crystal element manufactured in the comparative example.
- FIG. 7 shows wavefront aberrations after 180 days from the manufacture of the liquid crystal element manufactured in the comparative example.
- a zinc oxide film containing Al is provided as the high resistance layer 41, and a silicon oxide layer (thickness 125 nm) is provided as the inorganic dielectric layer 42.
- the inorganic dielectric layer was not provided.
- the thickness of each of the liquid crystal layers 11a and 11b is reduced while the entire thickness of the liquid crystal layer 11 is increased. can do. Therefore, further high-speed response can be realized.
- the liquid crystal layer may be divided into, for example, three or more liquid crystal layers.
- the liquid crystal layer may be divided into, for example, four liquid crystal layers.
- the present invention is not limited to this configuration.
- a stacked body of a plurality of high resistance layers may be provided.
- a laminate of a plurality of inorganic dielectric layers may be provided.
- the laminated body of the some inorganic dielectric material layer may comprise the reflection suppression layer which suppresses interface reflection.
- a laminate of a plurality of inorganic dielectric layers is provided so as to be in contact with a low refractive index layer having a relatively low refractive index, and a high refractive index layer having a relatively high refractive index. And may be included.
- the liquid crystal element may have a single liquid crystal layer 11 without the intermediate plate.
- the liquid crystal element of the present invention may be a liquid crystal element other than a liquid crystal lens.
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- Nonlinear Science (AREA)
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- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
Description
本発明に係る液晶素子用セルは、液晶を注入することにより液晶素子となるセルである。本発明に係る液晶素子用セルは、液晶層を形成するための空間部と、第1及び第2の電極と、高抵抗層と、無機誘電体層とを備える。高抵抗層は、第1及び第2の電極のうち、いずれか一方の電極と空間部との間に配されている。無機誘電体層は、高抵抗層と空間部との間に配されている。
なお、液晶を注入するための注入口は、第1及び第2の基板31,32の少なくとも一方に設けられていてもよいし、隔壁部材34に設けられていてもよい。
11…液晶層
11a…第1の液晶層
11b…第2の液晶層
21…第1の電極
21a…第1の電極部
21a1…開口部
21b…第2の電極部
22…第2の電極
31…第1の基板
31a…第1の基板の表面
32…第2の基板
32a…第2の基板の表面
33…中間板
34…隔壁部材
41…高抵抗層
42…無機誘電体層
Claims (8)
- 液晶層と、
前記液晶層に電圧を印加する第1及び第2の電極と、
前記第1及び第2の電極のうち、いずれか一方の電極と前記液晶層との間に配された高抵抗層と、
前記高抵抗層と前記液晶層との間に配された無機誘電体層と、
を備える、液晶素子。 - 前記液晶層内に配されており、前記液晶層を厚み方向に分割する少なくともひとつの中間板をさらに備える、請求項1に記載の液晶素子。
- 前記無機誘電体層は、無機酸化物誘電体層及び無機フッ化物誘電体層の少なくとも一方により構成されている、請求項1または2に記載の液晶素子。
- 前記無機酸化物誘電体層は、酸化ケイ素、酸化アルミニウム、酸化チタン、酸化タンタル、酸化ニオブ及び酸化ジルコニウムの少なくとも一種を含む、請求項3に記載の液晶素子。
- 前記無機フッ化物誘電体層は、フッ化マグネシウムを含む、請求項3または4に記載の液晶素子。
- 前記高抵抗層は、酸化亜鉛、アルミニウム亜鉛酸化物、インジウムスズ酸化物、アンチモンスズ酸化物、ガリウム亜鉛酸化物、シリコン亜鉛酸化物、スズ亜鉛酸化物、ホウ素亜鉛酸化物及びゲルマニウム亜鉛酸化物のうちの少なくとも一種を含む、請求項1~5のいずれか一項に記載の液晶素子。
- 前記第1及び第2の電極のうち、いずれか一方の電極は、開口部を有する第1の電極部と、前記第1の電極部内に配された第2の電極部とを有する、請求項1~6のいずれか一項に記載の液晶素子。
- 液晶を注入することにより液晶素子となる液晶素子用セルであって、
液晶層を形成するための空間部と、
第1及び第2の電極と、
前記第1及び第2の電極のうち、いずれか一方の電極と前記空間部との間に配された高抵抗層と、
前記高抵抗層と前記空間部との間に配された無機誘電体層と、
を備える、液晶素子用セル。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/345,427 US9529243B2 (en) | 2011-10-25 | 2012-10-01 | Liquid crystal element and cell for liquid crystal element |
JP2012544974A JP6167519B2 (ja) | 2011-10-25 | 2012-10-01 | 液晶素子及び液晶素子用セル |
KR1020147007210A KR20140091668A (ko) | 2011-10-25 | 2012-10-01 | 액정 소자 및 액정 소자용 셀 |
CN201280052680.0A CN103890646B (zh) | 2011-10-25 | 2012-10-01 | 液晶元件和液晶元件用晶胞 |
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JP2011-234151 | 2011-10-25 | ||
JP2011234151 | 2011-10-25 |
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WO2013061729A1 true WO2013061729A1 (ja) | 2013-05-02 |
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PCT/JP2012/075367 WO2013061729A1 (ja) | 2011-10-25 | 2012-10-01 | 液晶素子及び液晶素子用セル |
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US (1) | US9529243B2 (ja) |
JP (1) | JP6167519B2 (ja) |
KR (1) | KR20140091668A (ja) |
CN (1) | CN103890646B (ja) |
TW (1) | TW201319675A (ja) |
WO (1) | WO2013061729A1 (ja) |
Cited By (2)
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WO2014203596A1 (ja) * | 2013-06-18 | 2014-12-24 | 日本電気硝子株式会社 | 液晶レンズ |
CN104977771A (zh) * | 2014-04-11 | 2015-10-14 | 点晶科技股份有限公司 | 液晶透镜结构 |
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WO2016117604A1 (ja) * | 2015-01-23 | 2016-07-28 | 国立大学法人大阪大学 | 液晶素子、偏向素子、液晶モジュール、及び電子機器 |
JP6508476B2 (ja) * | 2015-10-30 | 2019-05-08 | 日本電気硝子株式会社 | 液晶レンズ |
CN105842888A (zh) * | 2016-05-31 | 2016-08-10 | 成都微晶景泰科技有限公司 | 用于快速对焦的光学元件及成像装置 |
JP7356899B2 (ja) * | 2019-12-26 | 2023-10-05 | Tianma Japan株式会社 | 液晶光偏向素子及び液晶光偏向素子の製造方法 |
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- 2012-10-01 KR KR1020147007210A patent/KR20140091668A/ko not_active Application Discontinuation
- 2012-10-01 JP JP2012544974A patent/JP6167519B2/ja not_active Expired - Fee Related
- 2012-10-01 WO PCT/JP2012/075367 patent/WO2013061729A1/ja active Application Filing
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JP2009037227A (ja) * | 2007-07-06 | 2009-02-19 | Semiconductor Energy Lab Co Ltd | 偏光子および偏光子を有する表示装置 |
JP2011017742A (ja) * | 2009-07-07 | 2011-01-27 | Akita Prefecture | 低電圧駆動液晶レンズ |
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WO2014203596A1 (ja) * | 2013-06-18 | 2014-12-24 | 日本電気硝子株式会社 | 液晶レンズ |
JP2015001697A (ja) * | 2013-06-18 | 2015-01-05 | 日本電気硝子株式会社 | 液晶レンズ |
CN104977771A (zh) * | 2014-04-11 | 2015-10-14 | 点晶科技股份有限公司 | 液晶透镜结构 |
US9897804B2 (en) | 2014-04-11 | 2018-02-20 | Silicon Touch Technology Inc. | Liquid crystal lens |
Also Published As
Publication number | Publication date |
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CN103890646A (zh) | 2014-06-25 |
JP6167519B2 (ja) | 2017-07-26 |
US9529243B2 (en) | 2016-12-27 |
US20140340624A1 (en) | 2014-11-20 |
CN103890646B (zh) | 2017-05-03 |
JPWO2013061729A1 (ja) | 2015-04-02 |
TW201319675A (zh) | 2013-05-16 |
KR20140091668A (ko) | 2014-07-22 |
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