WO2012118188A2 - 調光素子及びそれを含む製品 - Google Patents
調光素子及びそれを含む製品 Download PDFInfo
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- WO2012118188A2 WO2012118188A2 PCT/JP2012/055415 JP2012055415W WO2012118188A2 WO 2012118188 A2 WO2012118188 A2 WO 2012118188A2 JP 2012055415 W JP2012055415 W JP 2012055415W WO 2012118188 A2 WO2012118188 A2 WO 2012118188A2
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- light control
- electrode
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- transparent electrode
- light
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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
- G02F1/15—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 an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
-
- 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
- G02F1/15—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 an electrochromic effect
- G02F1/153—Constructional details
- G02F1/155—Electrodes
- G02F2001/1552—Inner electrode, e.g. the electrochromic layer being sandwiched between the inner electrode and the support substrate
Definitions
- the present invention relates to a light control element and a product including the same, and more specifically, an element that includes an electrochromic material and performs light control by changing light physical properties of the electrochromic material, and a product using the same, such as a display
- the present invention relates to a display device suitable for a display device, a light control filter for adjusting the amount of light incident from the outside, an antiglare mirror, and the like.
- Display devices for displaying information such as televisions, personal computer monitors and mobile phone displays are indispensable devices in the information-oriented society in recent years.
- dimming filters and anti-glare mirrors that adjust the amount of light incident from the outside have the same effects as curtains and the like because they can adjust light from outside in spaces such as indoors, cars, and aircraft. It is very useful in life.
- the display methods of the display device can generally be roughly divided into three types: a reflection type, a transmission type, and a light emission type.
- a person who manufactures a display device selects a preferable display method in consideration of the environment where the display device is placed in the manufacture of the display device.
- Patent Document 1 discloses an electrochromic mirror in which a mirror layer is formed on one of a pair of substrates.
- the present invention has an object to provide a light control device having a high-quality mirror surface that can be used in a transmissive type and enables a high contrast ratio, and a product including the same.
- a display device is formed between a pair of substrates, a pair of electrodes formed on opposite surfaces of the pair of substrates, one of which is a transparent electrode having nano-order unevenness, and the pair of electrodes.
- One of the characteristics is that it is sandwiched and has an electrolyte, an electrochromic material containing silver, and an electrolyte layer containing a mediator.
- a dimming element having a high-quality mirror surface that can be used in a transmissive type and enables a high contrast ratio, and a product including the same.
- FIG. 1 is a diagram showing a schematic cross section of a display device (hereinafter referred to as “the present display device”) 1 according to the present embodiment which is an example of a light control element of the present invention.
- the display device 1 is sandwiched between a pair of substrates 2 and 3, a pair of electrodes 21 and 31 formed on opposing surfaces of the pair of substrates, and a pair of electrodes 21 and 31.
- the pair of substrates 2 and 3 are used for sandwiching and holding the electrolyte layer 4, and at least one of the substrates 2 and 3 may be transparent.
- Type display device can be realized.
- the material of the substrate is not limited as long as it has a certain degree of hardness and chemical stability and can stably hold the material layer, but glass, plastic, metal, semiconductor, etc. In the case of using as a transparent substrate, glass or plastic can be used.
- electrodes 21 and 31 are formed on each of the pair of substrates 2 and 3 on the opposite surface side (inside). This electrode is used to apply a voltage to the material layer sandwiched between the pair of substrates 2 and 3.
- the electrode material is not limited as long as it has suitable conductivity.
- the electrode material is transparent including at least one of ITO, IZO, SnO 2 , ZnO, and the like. An electrode is preferred.
- one of the electrodes 21 and 31 is a transparent conductive particle-modified electrode with relatively large irregularities, and the other is a smooth electrode.
- the particle-modified electrode refers to an electrode in which particles are fixed on the electrode surface and relatively large unevenness and nano-order unevenness are formed.
- the size of the unevenness of the particle-modified electrode is not limited, but the height difference of the unevenness in the measured region (difference between the maximum height and the minimum height) is preferably in the range of 50 nm to 500 nm. Preferably it is the range of 100 nm or more and 500 nm or less.
- a smooth electrode is an electrode that is not as uneven as described above, and that has an unevenness and is nano-order or less, and is not limited, but the height difference is preferably 20 nm or less. Preferably it is 10 nm or less, More preferably, it is 5 nm or less.
- the material for the smooth electrode the same material as that for the particle-modified electrode can be used.
- the surface roughness of the particle-modified electrode is preferably such that the surface roughness (Ra) by stylus measurement is in the range of 100 nm to 400 nm, more preferably 50 nm.
- the range is not less than 400 nm.
- the surface roughness is preferably less than this, specifically, the surface roughness (Ra) by stylus measurement is 20 nm, more preferably 10 nm or less, more preferably 5 nm or less. It is preferable that By setting it as this range, the mirror state described in detail later can be realized.
- the electrode according to the present embodiment may be formed on the substrate in a shape that matches a pattern such as a character to be displayed, or an electrode pattern divided into a plurality of the same regions is formed side by side on a plurality of substrates. It may be what you did. When divided into a plurality of areas, each area is regarded as a pixel, and there is an advantage that display can be controlled for each pixel and display of complicated shapes can be handled.
- the distance between the electrodes is not limited as long as an electric field in which silver in the electrochromic material, which will be described in detail later, is sufficiently precipitated and disappears, can be applied, but can be 1 ⁇ m or more and 10 mm or less. Desirably, the thickness is in the range of 1 ⁇ m to 1 mm.
- the electrodes according to the present embodiment are connected to a power source via conductive wires, respectively, and the application of voltage to the material layer and the cancellation of the application can be controlled by turning on and off the power source.
- the electrolyte layer 4 according to the present embodiment includes an electrolyte as a supporting salt, and also includes an electrochromic material and a mediator including silver ions.
- the electrolyte layer 4 according to this embodiment contains a solvent for holding these materials.
- the electrolyte in the electrolyte layer of the present embodiment is for promoting redox and the like of the electrochromic material and is preferably a supporting salt.
- the electrolyte preferably contains bromine ions, and examples thereof include LiBr, KBr, NaBr, and tetrabutylammonium bromide (TBABr).
- the concentration of the electrolyte is not limited, but it is preferably about 5 times that of the electrochromic material in terms of molar concentration, specifically 3 times or more and 6 times or less.
- the solvent is not limited as long as it can stably hold the electrochromic material, the electrochemiluminescent material and the electrolyte, but may be a polar solvent such as water, Common things, such as a nonpolar organic solvent, can also be used.
- the solvent is not limited, but DMSO can be used, for example.
- the electrochromic material is a material that causes a redox reaction by applying a DC voltage, and is preferably a salt containing silver ions.
- This electrochromic material can deposit or disappear silver fine particles by an oxidation-reduction reaction, cause a color change based on this, and display.
- the electrochromic material containing silver include, but are not limited to, AgNO 3 , AgClO 4 , and AgBr.
- the concentration of the electrochromic material is not particularly limited as long as it has the above functions, and can be appropriately adjusted depending on the material, but is preferably 5 M or less, more preferably 1 mM to 1 M, and further Desirably, it is 5 mM to 100 mM.
- the mediator refers to a material that can be oxidized and reduced with energy electrochemically lower than that of silver.
- the oxidant of the mediator can support the decoloring reaction by oxidation by giving and receiving electrons from silver at any time.
- the mediator is not limited as long as it has the above function, but is preferably a copper (II) ion salt, and examples thereof include CuCl 2 , CuSO 4 , and CuBr 2 .
- the concentration of the mediator is not limited as long as it exhibits the above functions, and can be appropriately adjusted depending on the material, but is preferably 5 mM or more and 20 mM or less, and more preferably 15 mM or less. Excessive coloring can be prevented by setting it as 20 mM or less.
- the concentration ratio of silver ions to copper (II) ions is not limited, but when the silver ions are set to 10, the copper (II) ions are preferably in the range of 1 to 3.
- a thickener in addition to the above-described constituent requirements, for example, a thickener can be added.
- the memory property of the electrochromic element can be improved by adding a thickener.
- a thickener it is not necessarily limited, For example, polyvinyl alcohol can be illustrated.
- the concentration of the thickener is not particularly limited, but for example, it is preferably included in the range of 5% by weight to 20% by weight with respect to the total weight of the electrolyte layer.
- This display device can realize, for example, a reflection state or a black state when a voltage is applied, and a transmission state when the voltage is released.
- the conceptual diagram of the state of the element which concerns on this embodiment is shown in FIG. 2A shows a mirror display state, and FIG. 2B shows a black display state.
- the display device when a voltage is applied between the electrodes, silver ions in the electrochromic are reduced and precipitated as silver in one electrode, while silver is dissolved again as silver ions when the voltage is released.
- silver when silver is formed in a smooth electrode shape, it becomes a mirror state, and when it is formed on the particle-modified electrode, light is irregularly reflected and becomes a black state.
- the substrate on which the smooth electrode is formed is on the front side, and the substrate on which the uneven particle modification electrode is formed is on the back side.
- the intensity of the voltage at the time of applying the DC voltage can be appropriately adjusted according to the distance between the pair of substrates and the distance between the pair of electrodes, and is not limited. It is preferably in the range of ⁇ 10 3 V / m or more and 1.0 ⁇ 10 5 V / m or less, more preferably in the range of 1.0 ⁇ 10 4 V / m or less.
- a transmissive type can be used, and a display device having a high-quality mirror state that enables a high contrast ratio is obtained.
- the present embodiment has a mediator, enables a redox material with energy lower than that of silver, and has extremely excellent repeated durability.
- it is possible to use a transmissive type and it is possible to provide a light control element having a high-quality mirror state that enables a high contrast ratio and a product including the same.
- a glass substrate was used as a pair of substrates, an ITO electrode was used as a pair of electrodes, AgNO 3 was used as an electrochromic material, DMSO was used as a solvent, TBABr was used as a supporting electrolyte (counter electrode reaction material), and CuCl 2 was used as a mediator.
- one electrode is an electrode substrate (ITO electrode) on which smooth ITO is formed, and the other is spin-coated (500 rpm ⁇ 5) with an ITO particle dispersion having a particle size of about 100 nm to 300 nm on the ITO electrode.
- FIG. 3 shows surface profiles of the ITO electrode and the ITO particle modified electrode. This surface profile is performed over a wide range of 3 mm width.
- the height difference of the unevenness was determined, and it was confirmed that there was a difference between the maximum height and the minimum height of about 400 nm in the uneven conductive electrode modified with unevenness.
- the smooth electrode has almost no unevenness and has only a difference between the maximum height and the minimum height of about 20 nm or less.
- the particle modified electrode was 189 nm
- the smooth electrode was 1 nm
- the particle modified electrode was nano-order. While unevenness was formed, the smooth electrode had unevenness below this, and it was confirmed that the roughness was very different.
- FIG. 6 shows the time of decoloring
- FIG. 7 shows the time of reflective display
- FIG. 8 shows the time of black display.
- FIG. 9 shows the transmittance and reflectance at 700 nm when ⁇ 2.5 V is applied for 10 seconds, 0.5 V is applied for 20 seconds, 2.5 V is applied for 10 seconds, and ⁇ 0.5 V is applied for 20 seconds.
- the reflectance increases while the transmittance decreases and it can be confirmed that it is in a reflecting state.
- the transmittance increases while the reflectance decreases and the transmittance decreases. It can be confirmed that it is in a state, the transmittance decreases at 2.5V, while the reflectance decreases, and it can be confirmed that the state is black.
- the transmittance increases and the reflectance decreases. It was confirmed that it was in a transmissive state. Moreover, it was confirmed that this state could be maintained even when the voltage cycle was repeated 1000 times. The result is shown in FIG.
- FIG. 11 shows the transmittance at 700 nm when -2.5 V is repeated for 10 seconds and -0.5 V is repeated for 15 seconds about 4000 times
- Fig. 12 is an enlarged view of the range between about 10 times. is there.
- an element similar to that of the present example was prepared, but an element not containing CuCl 2 was created and evaluated in the same manner (see FIG. 12). As a result, it was confirmed that the inclusion of CuCl 2 has extremely excellent repeated durability.
- this embodiment can realize a light control element including an electrochromic material having a highly reflective specular display mode and a device including the same.
- the present invention has industrial applicability as a display device.
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims (11)
- 一対の基板と、
前記一対の基板の対向する面に形成され、一方がナノオーダーの凹凸のある透明電極である一対の電極と、
前記一対の電極の間に挟持され、電解質、銀を含むエレクトロクロミック材料及びメディエータを含む電解質層と、を有する調光素子。 - 前記凹凸のある透明電極は、透明導電性粒子修飾電極である請求項1記載の調光素子。
- 前記凹凸のある透明電極に対向する他の一方の電極は、平滑な透明電極である請求項1記載の調光素子。
- 前記凹凸のある透明電極は、最大高さと最小高さの差が100nm以上500nm以下の範囲にある請求項1記載の調光素子。
- 前記凹凸のある透明電極は、触針式による表面粗さが、50nm以上400nm以下の範囲にある請求項1記載の調光素子。
- 前記メディエータは、銅(II)イオンを含む、請求項1記載の調光素子。
- 前記メディエータの銅(II)イオンのモル濃度は、前記エレクトロクロミック材料の銀イオンのモル濃度を10とした場合、1以上3以下の範囲である請求項6記載の調光素子。
- 前記電解質は、前記電解質層に含まれる前記エレクトロクロミック材料のモル濃度の3倍以上6倍以下の範囲である請求項1記載の調光素子。
- 前記電解質は、増粘剤を含む請求項1記載の調光素子。
- 前記凹凸のある透明電極は、ITO、IZO、SnO2及びZnOの少なくともいずれかを含む請求項1記載の調光素子。
- 請求項1に記載の調光素子を、少なくとも一部に含む製品。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/001,955 US9188826B2 (en) | 2011-03-02 | 2012-03-02 | Light-adjusting element and product containing the same |
| KR1020137023412A KR101533752B1 (ko) | 2011-03-02 | 2012-03-02 | 조광소자 및 이를 포함하는 제품 |
| JP2013502419A JP5751560B2 (ja) | 2011-03-02 | 2012-03-02 | 調光素子及びそれを含む製品 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-045762 | 2011-03-02 | ||
| JP2011045762 | 2011-03-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2012118188A2 true WO2012118188A2 (ja) | 2012-09-07 |
| WO2012118188A3 WO2012118188A3 (ja) | 2012-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2012/055415 Ceased WO2012118188A2 (ja) | 2011-03-02 | 2012-03-02 | 調光素子及びそれを含む製品 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9188826B2 (ja) |
| JP (3) | JP5751560B2 (ja) |
| KR (1) | KR101533752B1 (ja) |
| WO (1) | WO2012118188A2 (ja) |
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|---|---|---|---|---|
| JP2012194412A (ja) * | 2011-03-17 | 2012-10-11 | Ricoh Co Ltd | エレクトロクロミック表示素子 |
| JP2014109688A (ja) * | 2012-12-03 | 2014-06-12 | Tokyo Kogei Univ | 表示装置の製造方法 |
| WO2014174823A1 (ja) * | 2013-04-22 | 2014-10-30 | スタンレー電気株式会社 | エレクトロデポジション素子及びミラーデバイス |
| JP2015210298A (ja) * | 2014-04-24 | 2015-11-24 | スタンレー電気株式会社 | 両面液晶表示装置及びバックライトユニット |
| JP2016157064A (ja) * | 2015-02-26 | 2016-09-01 | スタンレー電気株式会社 | 光学装置 |
| WO2017130636A1 (ja) * | 2016-01-31 | 2017-08-03 | 国立大学法人千葉大学 | エレクトロクロミック表示素子 |
| US9971224B2 (en) | 2015-11-24 | 2018-05-15 | Stanley Electric Co., Ltd. | Electro-optical device |
| JP2018105920A (ja) * | 2016-12-22 | 2018-07-05 | スタンレー電気株式会社 | 電気光学装置 |
| EP3392705A1 (en) | 2017-04-17 | 2018-10-24 | Stanley Electric Co., Ltd. | Electro-optical apparatus and display apparatus comprising such an electro-optical apparatus |
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| JP2018180457A (ja) * | 2017-04-20 | 2018-11-15 | スタンレー電気株式会社 | 電気光学装置、投影スクリーン |
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| JP5751560B2 (ja) * | 2011-03-02 | 2015-07-22 | 国立大学法人 千葉大学 | 調光素子及びそれを含む製品 |
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2012
- 2012-03-02 JP JP2013502419A patent/JP5751560B2/ja active Active
- 2012-03-02 WO PCT/JP2012/055415 patent/WO2012118188A2/ja not_active Ceased
- 2012-03-02 US US14/001,955 patent/US9188826B2/en active Active
- 2012-03-02 KR KR1020137023412A patent/KR101533752B1/ko active Active
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2015
- 2015-05-10 JP JP2015096125A patent/JP6004384B2/ja active Active
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2016
- 2016-08-26 JP JP2016165588A patent/JP6341577B2/ja active Active
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| JP2014109688A (ja) * | 2012-12-03 | 2014-06-12 | Tokyo Kogei Univ | 表示装置の製造方法 |
| WO2014174823A1 (ja) * | 2013-04-22 | 2014-10-30 | スタンレー電気株式会社 | エレクトロデポジション素子及びミラーデバイス |
| JP2014215307A (ja) * | 2013-04-22 | 2014-11-17 | スタンレー電気株式会社 | エレクトロデポジション素子及びミラーデバイス |
| US10168595B2 (en) | 2013-04-22 | 2019-01-01 | Stanley Electric Co., Ltd. | Electrodeposition element and mirror device |
| JP2015210298A (ja) * | 2014-04-24 | 2015-11-24 | スタンレー電気株式会社 | 両面液晶表示装置及びバックライトユニット |
| US10838281B2 (en) | 2014-08-07 | 2020-11-17 | Panasonic Intellectual Property Management Co., Ltd. | Display device |
| US10527875B2 (en) | 2014-10-22 | 2020-01-07 | Panasonic Intellectual Property Management Co., Ltd. | Optical device, optical device controller, and method for manufacturing optical device |
| JP2016157064A (ja) * | 2015-02-26 | 2016-09-01 | スタンレー電気株式会社 | 光学装置 |
| US10345675B2 (en) | 2015-05-21 | 2019-07-09 | Panasonic Intellectual Property Management Co., Ltd. | Optical device |
| US9971224B2 (en) | 2015-11-24 | 2018-05-15 | Stanley Electric Co., Ltd. | Electro-optical device |
| WO2017130636A1 (ja) * | 2016-01-31 | 2017-08-03 | 国立大学法人千葉大学 | エレクトロクロミック表示素子 |
| US10996534B2 (en) | 2016-07-25 | 2021-05-04 | Stanley Electric Co., Ltd. | Electro-chemical device |
| JP2018105920A (ja) * | 2016-12-22 | 2018-07-05 | スタンレー電気株式会社 | 電気光学装置 |
| JP2018180351A (ja) * | 2017-04-17 | 2018-11-15 | スタンレー電気株式会社 | 電気光学装置、表示装置 |
| US10409131B2 (en) | 2017-04-17 | 2019-09-10 | Stanley Electric Co., Ltd. | Electro-optical apparatus, display apparatus |
| EP3392705A1 (en) | 2017-04-17 | 2018-10-24 | Stanley Electric Co., Ltd. | Electro-optical apparatus and display apparatus comprising such an electro-optical apparatus |
| JP7078352B2 (ja) | 2017-04-17 | 2022-05-31 | スタンレー電気株式会社 | 電気光学装置、表示装置 |
| JP2018180457A (ja) * | 2017-04-20 | 2018-11-15 | スタンレー電気株式会社 | 電気光学装置、投影スクリーン |
| JP2018180456A (ja) * | 2017-04-20 | 2018-11-15 | スタンレー電気株式会社 | 液晶表示装置 |
| WO2021220583A1 (ja) * | 2020-04-30 | 2021-11-04 | 株式会社村上開明堂 | 可変ndフィルタ |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2016194734A (ja) | 2016-11-17 |
| JP6004384B2 (ja) | 2016-10-05 |
| JP2015148825A (ja) | 2015-08-20 |
| US20140218781A1 (en) | 2014-08-07 |
| JPWO2012118188A1 (ja) | 2014-07-07 |
| KR20130122673A (ko) | 2013-11-07 |
| JP5751560B2 (ja) | 2015-07-22 |
| JP6341577B2 (ja) | 2018-06-13 |
| WO2012118188A3 (ja) | 2012-11-15 |
| KR101533752B1 (ko) | 2015-07-03 |
| US9188826B2 (en) | 2015-11-17 |
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