WO2013088630A1 - 可変焦点レンズの制御装置、可変焦点レンズの制御方法、および電子メガネ - Google Patents
可変焦点レンズの制御装置、可変焦点レンズの制御方法、および電子メガネ Download PDFInfo
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- WO2013088630A1 WO2013088630A1 PCT/JP2012/007079 JP2012007079W WO2013088630A1 WO 2013088630 A1 WO2013088630 A1 WO 2013088630A1 JP 2012007079 W JP2012007079 W JP 2012007079W WO 2013088630 A1 WO2013088630 A1 WO 2013088630A1
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/08—Auxiliary lenses; Arrangements for varying focal length
- G02C7/081—Ophthalmic lenses with variable focal length
- G02C7/083—Electrooptic lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/12—Fluid-filled or evacuated lenses
- G02B3/14—Fluid-filled or evacuated lenses of variable focal length
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C1/00—Assemblies of lenses with bridges or browbars
-
- 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
- G02F1/01—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
-
- 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
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/20—Diffractive and Fresnel lenses or lens portions
-
- 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 control of a variable focus lens. More specifically, the present invention relates to control of a lens whose refractive index can be changed using a liquid crystal material or the like.
- the semi-finished blank for a variable focus liquid crystal lens is composed of a lower base material whose surface is convexly curved and an upper base material having a concavely curved back surface joined to face the upper surface.
- a variable focus portion made of a liquid crystal material is disposed between the upper and lower substrates. By applying a voltage to the liquid crystal material, the refractive index of the variable focus portion is made variable.
- Such a semi-finished blank is used as a lens for perspective glasses, for example, after a predetermined processing (Patent Document 1).
- the present disclosure provides a control device for a variable focus lens that shortens the period of white turbidity that occurs when the applied voltage of the variable focus lens is switched and suppresses a reduction in the commercial value of the variable focus lens.
- the variable focus lens control device includes a first substrate, a second substrate facing the first substrate, and a variable focus unit disposed between the first substrate and the second substrate. Control the lens. When switching to a state in which no voltage is applied, the control device applies a voltage for a predetermined time after applying no voltage to the variable focal point, and then applies no voltage.
- variable focus portion may be, for example, a cholesteric liquid crystal material that has been subjected to horizontal alignment.
- a Fresnel lens may be formed on the first substrate so as to correspond to the variable focus portion.
- the voltage may be applied to the variable focus portion for a predetermined time.
- the voltage may be applied to the variable focus portion for a predetermined time before the transmittance of the variable focus portion becomes the lowest.
- the voltage to the variable focus section may be a rectangular wave, for example. Further, after the voltage to the variable focus section is not applied, the voltage to be applied to the variable focus section for a predetermined time may be, for example, one period or half period of the rectangular wave.
- the amplitude of the voltage applied to the variable focus section may be substantially the same as the amplitude of the drive voltage of the control device for the variable focus lens.
- variable focus lens control device of the present disclosure it is possible to suppress a decrease in the commercial value of the variable focus lens. That is, it is possible to shorten the cloudiness time that occurs when switching the applied voltage of the variable focus lens.
- FIG. 1 is a perspective view of electronic glasses according to an embodiment.
- FIG. 5 is a schematic cross-sectional exploded view of the semi-finished blank of FIG. 4.
- the flowchart which showed the partial control of the electronic glasses which concern on embodiment.
- control unit 4 for controlling the variable focus lens 2 an example of a variable focus lens
- FIG. 1 is a schematic configuration diagram in which a variable focus lens 2 obtained from a semi-finished blank 6 for variable focus lens (hereinafter referred to as a semi-blank) through a predetermined process such as surfacing and edging is configured as electronic glasses 8. is there.
- the electronic glasses 8 include a glasses frame 10 (an example of a frame), a variable focus lens 2, a control unit 4, a sensor unit 12, and the like.
- variable focus portion 14 having a liquid crystal material (for example, cholesteric) is formed in a region shifted downward from the center of the variable focus lens 2.
- the variable focus portion 14 can electrically change the refractive index of the variable focus lens 2.
- FIG. 2A shows an electrical block diagram of the electronic glasses 8.
- the eyeglass frame 10 is provided with a power supply unit 16, a sensor unit 12, a control unit 4 (an example of a control device), and a circuit unit 18 (an example of a drive unit).
- the power supply unit 16 incorporates a charging battery and a booster circuit (both not shown), and supplies voltage to the sensor unit 12, the control unit 4, and the circuit unit 18.
- the sensor unit 12 can be composed of an angular velocity sensor, an inclination sensor, or the like. The movement of the head of the user wearing the electronic glasses 8 is detected by such a sensor, and a signal is output to the control unit 4.
- the sensor unit 12 can also output a signal to the control unit 4 by sensing a user operation (including user operation) such as a user's hand touch.
- control unit 4 changes the refractive index of the variable focus unit 14 by controlling the voltage applied to the variable focus unit 14 in response to the signal from the sensor unit 12.
- the control unit 4 is configured by a processor or a memory that executes each process according to a program, for example.
- the circuit unit 18 (an example of a driving unit) incorporates a circuit that generates a lens driving waveform (not shown), and applies a voltage to the variable focal point unit 14 in response to a command signal from the control unit 4. Drive.
- control unit 4 functions as a control device.
- the control unit 4 includes an input unit 41 that inputs an ON signal or an OFF signal from the sensor unit 12, a determination unit 42 that determines a switching signal from the sensor unit 12, and a determination unit 42.
- An output unit 43 that outputs a command signal that is a determination result output from the circuit unit 18 to the circuit unit 18.
- the control device may include the control unit 4 and the circuit unit 18.
- FIG. 3B is a front view of the lower substrate 20 (an example of a first substrate)
- FIG. 3A is a front view of an upper substrate 22 (an example of a second substrate) bonded to face the lower substrate 20.
- a Fresnel lens 24 is formed in a partial region near the center of the lower substrate 20.
- a semi-blank 6 as shown in FIG. 4 is formed by forming a predetermined film between the lower substrate 20 and the upper substrate 22 and bonding them.
- FIG. 5 is a schematic cross-sectional exploded view of the semi-blank 6 shown in FIG. 4 in the thickness direction (direction parallel to the paper surface) passing through the variable focal portion 14.
- the first transparent conductive film 26 the first alignment film 28, and the liquid crystal material are sequentially formed from the lower substrate 20 side toward the upper substrate 22.
- a second alignment film 32, and a second transparent conductive film 34 are formed.
- a sealing agent 36 is applied instead of the liquid crystal material 30 in a region not facing the Fresnel lens 24.
- the liquid crystal material 30 is applied only to the region where the Fresnel lens 24 is formed, and the sealant 36 is applied to the other region.
- the alignment film may be formed only in the region where the Fresnel lens 24 is formed.
- a necessary insulating layer for example, a silicon dioxide film
- the transparent conductive film and the alignment film is omitted for the sake of explanation.
- the electronic glasses 8 having the above configuration are used as, for example, perspective glasses whose refractive index can be changed in two steps, if the user is facing down, the user faces upward so that the near vision is good.
- the refractive index of the variable focal point portion 14 is made smaller than that when it is (myopia refractive index).
- the sensor unit detects this, and the control unit 4 increases the refractive index of the variable focus unit 14 so that the far field of view is good (refractive index for far vision).
- FIG. 6 shows the operation of the control unit 4 in a flowchart, and the operation of the control unit 4 will be described based on this flowchart.
- the sensor unit 12 When the electronic glasses 8 are turned on, a voltage is supplied to the sensor unit 12 (S1). In this state, the drive voltage to the variable focus section 14 is off, and the variable focus section 14 is set to the far-sighted refractive index as an initial state.
- the sensor unit 12 senses the movement of the head of the user wearing the electronic glasses 8, specifically the change in the vertical angle of the electronic glasses 8, the sensor unit 12 outputs an on signal or an off signal (a predetermined switching signal).
- An example is output to the control unit 4 (S2).
- the control unit 4 For example, when the user turns down to read a book, the sensor unit 12 that senses a predetermined angle of the head outputs an ON signal to the control unit 4.
- the circuit unit 18 turns on the drive voltage to the variable focus unit 14 (S3). At this time, the variable focus section 14 is set to a myopia refractive index suitable for reading a book.
- the sensor unit 12 senses the angle and outputs an off signal to the control unit 4 (S4), and also outputs to the variable focus unit 14 via the circuit unit 18.
- the drive voltage is turned off (S5).
- a timer (not shown) connected to the control unit 4 is set to zero in order to measure the time during which the variable focus unit 14 is off.
- the refractive index of the variable focus section 14 is set to the refractive index for hyperopia.
- the control unit 4 determines whether or not the OFF state of the variable focus unit 14 exceeds a predetermined time, for example, 100 ms, by timer measurement (S6). When it is determined that the OFF state of the variable focus unit 14 has exceeded the predetermined time, the control unit 4 outputs a signal for applying a fresh voltage to the variable focus unit 14 for a short time to the circuit unit 18 (S7). After the fresh voltage is applied for a predetermined time, the voltage is not applied to the variable focal point portion 14 and is turned off.
- a predetermined time for example, 100 ms
- FIG. 7 shows the effect of Example 1 according to this embodiment.
- the transmittance of the variable focal point portion 14 is taken on the vertical axis, and the time transition is shown on the horizontal axis.
- the fresh voltage used here one cycle of a pulse having the same cycle (for example, 50 Hz) and voltage value (for example, 10 V) as the voltage for driving the variable focus section 14 was used.
- the fresh voltage was applied 100 ms after the drive voltage was turned off when the liquid crystal material 30 was in the focal conic state.
- the transmittance is 95% or more, the user does not feel the cloudy state that occurs when the drive voltage to the variable focus section 14 is turned off.
- FIG. 8 shows a case where the application content of the fresh voltage is changed, and the fresh voltage used in FIG. 7 is a half cycle (for example, about 25 Hz). Even in this case, it takes only about 730 ms from turning off the drive voltage to achieve the transmittance of the variable focus portion 14 to 95%. In the embodiments of FIGS. 7 and 8, the transmittance is rapidly reduced immediately after application of the fresh voltage, but since it is in a very short period, it cannot be recognized by humans.
- FIG. 9 shows an example in which a fresh voltage is not applied as a comparative example with respect to Examples 1 and 2.
- the liquid crystal material shifts to the focal conic state from when the drive voltage to the variable focus portion 14 is turned off, and the transmittance of the variable focus portion 14 rapidly decreases. After that, it gradually recovers, and the transmittance reaches 95% after about 1840 ms has elapsed since the drive voltage was turned off.
- FIG. 10 shows HCT (Haze Clearing Time) when the voltage value of the fresh voltage is changed.
- HCT Haze Clearing Time
- the fresh voltage one cycle of a pulse having the same cycle (for example, 50 Hz) as that of the drive voltage to the variable focus unit 14 was used.
- the amplitude is preferably the same or approximate to the drive voltage of the variable focus section 14.
- HTC is preferably between about 20 ms and 600 ms, and more preferably between about 50 ms and 300 ms.
- FIG. 11 shows the relationship between the application timing of the fresh voltage, that is, the time T from when the drive voltage to the variable focus section 14 is turned off until the fresh voltage is applied, and HCT.
- the transition to the planar state is quickly performed by applying the fresh voltage for a predetermined period. Therefore, the generation period of the cloudiness phenomenon can be shortened. Thus, the user does not sense flickering of the lens 2 of the electronic glasses 8.
- the sensor unit 12 uses an angular velocity sensor or a tilt sensor.
- the refractive index of the variable focal point unit 14 may be switched manually by the user.
- variable focus portion 14 is set to the refractive index for hyperopia as an initial state in the electronic glasses 8, but is not limited thereto.
- the variable focus section 14 may be set to a refractive index for myopia.
- the control unit 4 determines a decrease in transmittance according to the signal from the predetermined sensor, and generates a command signal according to the determination result, that is, a command signal for turning on or off the voltage to the variable focus unit 14 as a circuit. To the unit 18.
- the present invention is useful in electronic glasses capable of changing the refractive index.
- Variable focus lens 4 Control unit 6 Semi-finished blank (semi blank) for variable focus lens 8 Electronic Glasses 10 Glasses Frame 12 Sensor Unit 14 Variable Focus Unit 16 Power Supply Unit 18 Circuit Unit 20 Lower Substrate (First Substrate) 22 Upper substrate (second substrate) 24 Fresnel lens 26 First transparent conductive film 28 First alignment film 30 Liquid crystal material 32 Second alignment film 34 Second transparent conductive film 36 Sealant
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Abstract
Description
また、上記可変焦点部への電圧を無印加とした後、上記可変焦点部へ所定時間印加させる電圧は、例えば、矩形波の1周期分または半周期分であるようにしてもよい。
上記実施の形態では、センサ部12は角速度センサや傾斜センサを用いたが、これに代えて、又はこれに加えてユーザの手動によって可変焦点部14の屈折率を切り替えできるようにしてもよい。
4 制御部
6 可変焦点レンズ用セミフィニッシュトブランク(セミブランク)
8 電子メガネ
10 メガネフレーム
12 センサ部
14 可変焦点部
16 電源部
18 回路部
20 下基板(第1基板)
22 上基板(第2基板)
24 フレネルレンズ
26 第1透明導電膜
28 第1配向膜
30 液晶材料
32 第2配向膜
34 第2透明導電膜
36 シール剤
Claims (15)
- 第1基板と、前記第1基板に対向する第2基板と、前記第1基板と前記第2基板との間に配置される可変焦点部とを有する可変焦点レンズを制御するための制御装置であって、
所定の切替信号が入力されると前記可変焦点部への電圧を無印加とした後、前記可変焦点部へ所定時間電圧を印加し、その後、前記可変焦点部への電圧を無印加にする、
制御装置。 - 前記可変焦点部は液晶材料からなり、
前記可変焦点部への電圧を無印加とした後、前記液晶材料の少なくとも一部がフォーカルコニック状態の間に前記可変焦点部へ所定時間電圧を印加する、
請求項1に記載の制御装置。 - 前記液晶材料は、コレステリック液晶材料である、
請求項2に記載の制御装置。 - 前記液晶材料は、これを挟む前記第1基板および前記第2基板に形成される配向膜により水平配向が施されている、
請求項3に記載の制御装置。 - 前記可変焦点部への電圧を無印加とした後、前記可変焦点部の透過率が最も低くなるときよりも前に、前記可変焦点部へ所定時間電圧を印加する、
請求項1から4のいずれか1項に記載の制御装置。 - 前記可変焦点部への電圧を無印加とした後、20msから600ms経過した後に、前記可変焦点部へ所定時間電圧を印加する、
請求項1から5のいずれか1項に記載の制御装置。 - 前記可変焦点部への電圧を無印加とした後、50ms~300ms経過した後に、前記可変焦点部へ所定時間電圧を印加する、
請求項6に記載の制御装置。 - 前記可変焦点部への電圧は矩形波である、
請求項1から7のいずれか1項に記載の制御装置。 - 前記可変焦点部への電圧を無印加とした後、前記可変焦点部へ印加する電圧は、前記矩形波の1周期分である、
請求項8に記載の制御装置。 - 前記可変焦点部への電圧を無印加とした後、前記可変焦点部へ印加する電圧は、前記矩形波の半周期分である、
請求項8に記載の制御装置。 - 前記可変焦点部へ印加する電圧の振幅は、前記可変焦点部を駆動するための電圧の振幅とほぼ同じである、
請求項1から10のいずれか1項に記載の制御装置。 - 第1基板と、前記第1基板に対向する第2基板と、前記第1基板と前記第2基板との間に配置される可変焦点部とを有する可変焦点レンズを制御するための制御方法であって、
所定の切替信号が入力されると前記可変焦点部への電圧を無印加とし、
前記可変焦点部へ所定時間電圧を印加し、そして、
前記可変焦点部への電圧を無印加にする、
制御方法。 - 第1基板と、前記第1基板に対向する第2基板と、前記第1基板と前記第2基板との間に配置される可変焦点部と、を有する可変焦点レンズと、
前記可変焦点レンズを取り付けるメガネフレームと、
前記メガネフレームに設けられ、ユーザの動作及び前記メガネフレームの角度の変化のうち少なくとも1つを検知して切替信号を出力するセンサ部と、
前記センサ部からの切替信号が前記可変焦点部への電圧をオフにするものである場合、前記可変焦点部への電圧を無印加とした後、前記可変焦点部へ所定時間電圧を印加させ、その後、無印加にする制御装置と、
を備える、電子メガネ。 - 前記第1基板には前記可変焦点部と対応するようにフレネルレンズが形成されている、
請求項13に記載の電子メガネ。 - 第1基板と、前記第1基板に対向する第2基板と、前記第1基板と前記第2基板との間に配置される可変焦点部とを有する可変焦点レンズを制御するための制御装置であって、
所定の信号が入力される入力部と、
前記入力部より前記所定の信号を受信し、前記所定の信号に応じて前記可変焦点部への電圧をオンにするかオフにするかを判定する判定部と、
前記判定部より受信した判定結果に応じて、前記可変焦点部への電圧をオン又はオフにする指令信号を出力する出力部と、
前記出力部から前記指令信号を受信する駆動部であって、前記指令信号が前記可変焦点部への電圧をオフにする信号である場合は、前記可変焦点部への電圧を無印加とした後、前記可変焦点部へ所定時間電圧を印加し、その後、前記可変焦点部への電圧を無印加にする、駆動部と、
を備える、制御装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US14/118,403 US9541774B2 (en) | 2011-12-16 | 2012-11-05 | Control device for variable focus lenses, control method for variable focus lenses, and electronic glasses |
CN201280024236.8A CN103547960B (zh) | 2011-12-16 | 2012-11-05 | 变焦透镜的控制装置及电子眼镜 |
KR1020137033087A KR102116003B1 (ko) | 2011-12-16 | 2012-11-05 | 가변 초점 렌즈의 제어 장치, 가변 초점 렌즈의 제어 방법, 및 전자 안경 |
JP2013549076A JP6008873B2 (ja) | 2011-12-16 | 2012-11-05 | 可変焦点レンズの制御装置、可変焦点レンズの制御方法、および電子メガネ |
EP12857658.4A EP2793072B1 (en) | 2011-12-16 | 2012-11-05 | Control device for variable focus lenses, control method for variable focus lenses, and electronic glasses |
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JP2011-275839 | 2011-12-16 | ||
JP2011275839 | 2011-12-16 |
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EP (1) | EP2793072B1 (ja) |
JP (1) | JP6008873B2 (ja) |
KR (1) | KR102116003B1 (ja) |
CN (1) | CN103547960B (ja) |
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Cited By (10)
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KR20140103034A (ko) | 2014-08-25 |
US9541774B2 (en) | 2017-01-10 |
US20140092327A1 (en) | 2014-04-03 |
EP2793072A4 (en) | 2015-06-03 |
JP6008873B2 (ja) | 2016-10-19 |
EP2793072A1 (en) | 2014-10-22 |
JPWO2013088630A1 (ja) | 2015-04-27 |
CN103547960A (zh) | 2014-01-29 |
CN103547960B (zh) | 2018-03-16 |
KR102116003B1 (ko) | 2020-05-27 |
EP2793072B1 (en) | 2019-10-09 |
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