WO2013100545A1 - 유기발광다이오드 패널의 휘도 보상 장치 - Google Patents
유기발광다이오드 패널의 휘도 보상 장치 Download PDFInfo
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- WO2013100545A1 WO2013100545A1 PCT/KR2012/011441 KR2012011441W WO2013100545A1 WO 2013100545 A1 WO2013100545 A1 WO 2013100545A1 KR 2012011441 W KR2012011441 W KR 2012011441W WO 2013100545 A1 WO2013100545 A1 WO 2013100545A1
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
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- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
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- G09G3/3275—Details of drivers for data electrodes
- G09G3/3283—Details of drivers for data electrodes in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
Definitions
- the present invention relates to a technique for compensating for the luminance change of an organic light emitting diode (OLED) panel, and in particular, a luminance deviation using a reference pixel provided at an adjacent position of a driving chip installed at an outer portion of the organic light emitting diode panel.
- the present invention relates to a luminance compensating device for an organic light emitting diode panel capable of compensating for and compensating for luminance of pixel elements arranged in a display area.
- OLED panels are attracting attention as next-generation display panels because they are electrically excited by fluorescent or phosphorescent organic materials to emit light and have excellent clarity and contrast ratio and can be manufactured in ultra-thin films.
- an OLED panel has a plurality of scan lines, a plurality of data lines, a drive line for transmitting a driving voltage, and a plurality of display pixels.
- the driving method of OLED panel is largely divided into analog driving method and digital driving method.
- display data is represented by controlling the light emission voltage or the light emission current supplied to the OLED.
- digital driving method display data is represented by adjusting the emission voltage or the emission current supplied to the OLED.
- the constant voltage driving method a constant driving voltage is supplied to the driving node of the pixel
- the constant current driving method the constant driving current is supplied to the driving node of the pixel.
- the luminance of light emitted from the OLED corresponds to display data.
- the constant current driving method a constant driving current is supplied to the OLED so that the light emitting current is almost constant, and the luminance variation of the OLED is small, but a luminance non-uniformity problem occurs due to the positional deviation of the constant current source supplying the constant driving current.
- the luminance non-uniformity problem as described above does not occur, but the luminance change of the OLED is relatively large because the light emitting current is not constant even when a constant driving voltage is supplied. For example, if the temperature is changed, the light emission current is changed even though the light emission voltage is constant, thereby changing the brightness of the OLED.
- the luminance in the OLED panel has a deviation from the target luminance due to variations in the manufacturing process of the OLED panel or changes in the economy. Such a luminance deviation acts as a factor of lowering the display quality of the OLED panel.
- luminance is indirectly detected based on the driving current of the OLED, the threshold voltage, and the like, and the luminance deviation is calculated and compensated.
- indirectly detecting luminance has a problem that the detection process is complicated and the accuracy is lowered.
- the problem to be solved by the present invention is to enable the driving chip installed in the outer portion of the OLED panel to compensate for the luminance by obtaining the luminance deviation for the pixel elements arranged in the display area by using the reference pixel installed in the adjacent position.
- a luminance compensating apparatus for an organic light emitting diode panel, the reference being provided on an organic light emitting diode panel to correspond to pixel elements arranged in the display area.
- a driving chip which controls the driving of the pixel elements arranged in the display area according to the luminance deviation value so that the light compensated for the luminance deviation is irradiated.
- the driving chip may include an optical sensor installed at an opposite position of the reference pixel element unit and configured to detect light incident from the reference pixel element unit and output a luminance detection signal according thereto; A comparator for comparing the luminance detection value input from the optical sensor with a reference luminance value and outputting a luminance deviation value according thereto, and a luminance deviation compensation control for controlling driving of the pixel elements according to the luminance deviation value output from the comparator And a luminance control unit for outputting a signal.
- a reference pixel having the same configuration as a pixel element arranged in a display area on an organic light emitting diode panel is provided at a position adjacent to a driving chip installed at an outer portion of an OLED panel, and the driving chip is mounted on the display area using the reference pixel.
- FIG. 1 is a plan view of a luminance compensation device of an organic light emitting diode panel according to the present invention.
- FIG. 2 is a block diagram of a luminance compensating device of an organic light emitting diode panel according to the present invention.
- FIG. 3 is a sectional view taken along the line A-A in FIG.
- FIG. 1 is a plan view of a luminance compensation device of an organic light emitting diode panel according to the present invention.
- the luminance compensating apparatus of the organic light emitting diode panel includes a display area 11, a gate driver 12, and a driving chip 13 on the organic light emitting diode panel 10.
- the display area 11 includes respective pixel elements P1.1-Pn.m at the intersections of the gate lines GL1 -GLn and the data lines DL1 -DLm arranged to cross each other.
- the pixel elements P1.1-Pn.m arranged as described above are driven when the gate signals supplied through the gate lines GL1 -GLn are enabled, so that the pixel elements P1.1-Pn.m are driven by the pixel signals supplied through the data lines DL1 -DLm. Generates light that corresponds to size
- the output terminals of the gate driver 12 are connected to the gate lines GL1-GLn.
- output terminals of the source driver in the driving chip 13 are respectively connected to the data lines DL1 -DLm.
- FIG. 2 is a block diagram of a luminance compensating device of an organic light emitting diode panel according to the present invention.
- the driving chip 13 includes an optical sensor 14, an analog-to-digital converter (ADC) 21, a reference luminance value storage unit 22, and a comparator 23. ), A brightness control unit 24, a source driver 25, and a direct current direct current conversion unit 26.
- ADC analog-to-digital converter
- the optical sensor 14 is installed in the driving chip 13, and is disposed at an opposite position of the reference pixel element portion provided on the organic light emitting diode panel 10 at the outside of the display area 11.
- FIG. 3 is a sectional view taken along the line A-A in FIG.
- a reference pixel element 31 is formed at an outer portion of the display area 11 on the organic light emitting diode panel 10, and an upper surface of the reference pixel element 31 is formed on the organic light emitting diode. It is formed to be exposed on the upper surface of the panel 10.
- the driving chip 13 is mounted on the organic light emitting diode panel 10 at an outer portion of the display area 11, and the optical sensor 14 is connected to the reference pixel element part in the driving chip 13. It is formed at a position corresponding to the upper surface of 31).
- an optical path layer 33 is formed between the upper surface of the reference pixel element unit 31 and the lower surface of the optical sensor 14.
- an outer portion of the driving chip 13 is provided.
- the light blocking film 32 surrounding the portion except the bottom surface is formed.
- the optical path 33 is surrounded by the connection layer 34 of the organic light emitting diode panel 10 and the driving chip 13.
- the reference pixel element unit 31 is a degree of deviation of luminance of the pixel elements P1.1-Pn.m arranged in the display area 11 of the organic light emitting diode panel 10 from a target luminance (luminance deviation). Is formed to detect).
- the transistor and the capacitor, including the OLED which is a component of the reference pixel element unit 31 are preferably the same as or very similar to the components of the pixel elements P1.1-Pn.m.
- the reference pixel element unit 31 may be a single pixel corresponding to one of red (R), green (G), and red (B), and may be applied to all of red (R), green (G), and red (B). It may be a corresponding pixel.
- the reference pixel element part 31 is driven by the driving chip 13.
- the driving chip 13 drives the reference pixel element unit 31.
- the reference pixel element unit 31 may be driven according to pre-programmed driving data and control signals.
- the driving may correspond to one pixel element among the pixel elements P1.1-Pn.m.
- an average value of driving data of a plurality of pixel elements arranged at an arbitrary position among the pixel elements P1.1-Pn.m may be obtained and driven with the average data.
- Light generated from the reference pixel element unit 31 is irradiated to the optical sensor 14 through the optical path layer 33.
- the light blocking layer 32 surrounds the reference pixel element unit 31 and the light path layer 33, the light sensor generated by the reference pixel element unit 31 does not leak to the outside. 14 is irradiated, and external light cannot be irradiated to the optical sensor 14.
- the optical sensor 14 senses light incident from the reference pixel element unit 31 and outputs a luminance detection signal accordingly.
- the analog-to-digital converter 21 converts the analog luminance detection signal input from the optical sensor 14 into a digital signal and outputs it to one input terminal of the comparator 23.
- the comparator 23 compares the luminance detection value input from the analog-digital converter 21 with a reference luminance value previously stored in the reference luminance value storage unit 22 and outputs the luminance deviation value accordingly.
- the luminance controller 24 checks the luminance deviation value input from the comparator 23 and ignores the luminance deviation value if it is equal to or less than a reference value. However, when the luminance controller 24 determines that the luminance deviation value input from the comparator 23 is equal to or greater than the reference value, the luminance controller 24 outputs a luminance deviation compensation control signal to perform a control function to compensate for the luminance.
- the luminance controller 24 controls the driving of the source driver 25 with the first luminance deviation compensation control signal according to the luminance deviation to supply the data voltage to the display area 11 through a data line.
- the level of is changed so that the luminance of light emitted from the pixel elements P1.1-Pn.m is maintained at a normal level.
- the luminance controller 24 controls the driving of the gate driver 12 with the second luminance deviation compensation control signal according to the luminance deviation to supply the gate signal to the display area 11 through a gate line.
- the driving time of the pixel elements P1.1-Pn.m is adjusted by adjusting the driving time of the pixel elements, whereby the luminance of the light emitted from the pixel elements P1.1-Pn.m is maintained at a normal level. To do that.
- the luminance controller 24 controls the driving of the DC-DC converter 26 with the third luminance deviation compensation control signal according to the luminance deviation to supply a level of the voltage supplied to the display area 11. This change is made so that the luminance of the light irradiated from the pixel elements P1.1-Pn.m is maintained at a normal level.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Description
Claims (10)
- 유기발광다이오드 패널 상에서 디스플레이 영역의 외곽부에 설치되어 상기 디스플레이 영역에 배열된 화소 소자와 대응되게 동작하는 기준화소 소자부;상기 디스플레이 영역의 외곽부 중에서 상기 기준화소 소자부를 포함하는 영역에 장착되어, 상기 기준화소 소자부로부터 입사되는 광의 휘도값을 기준휘도값과 비교하여 그에 따른 휘도편차값을 구한 후 상기 휘도편차값에 따라 상기 디스플레이 영역에 배열된 화소 소자들의 구동을 제어하여 휘도편차가 보상된 광이 조사되도록 하는 구동칩을 포함하되,상기 구동칩은,기준 화소 소자부의 대향되는 위치에 설치되어 상기 기준 화소 소자부로부터 입사되는 광을 검출하여 그에 따른 휘도검출신호를 출력하는 광센서;상기 광센서로부터 입력되는 휘도검출값을 기준휘도값과 비교하여 그에 따른 휘도편차값을 출력하는 비교기 및상기 비교기에서 출력되는 휘도편차값에 따라 상기 화소 소자들의 구동을 제어하기 위한 휘도편차 보상제어신호를 출력하는 휘도 제어부를 구비하는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 기준화소 소자부는적색(R), 녹색(G) 및 적색(B) 중 하나에 대응되는 단일 화소 소자를 구비하는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 기준화소 소자부는적색(R), 녹색(G) 및 적색(B) 모두에 대응되는 화소 소자를 구비하는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 기준화소 소자부는미리 프로그래밍된 구동데이터 및 제어신호에 따라 구동되는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 기준화소 소자부는상기 디스플레이 영역에 배열된 상기 화소 소자들 중에서 임의의 위치에 배열된 복수 개의 화소 소자의 구동 데이터의 평균치로 구동되는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 구동칩의 외곽부 중 바닥면을 제외한 부분을 둘러싸는 광차단막을 더 구비되는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 기준화소 소자부와 광센서의 사이에 광통로 층이 더 구비되는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 휘도 제어부에서 출력되는 휘도편차 보상제어신호에 따라 데이터라인을 통해 상기 디스플레이 영역에 공급되는 데이터 전압의 레벨을 변경하여 상기 화소 소자들로부터 조사되는 광의 휘도가 정상 수준을 유지하도록 하는 소스 드라이버를 더 구비하는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 휘도 제어부에서 출력되는 휘도편차 보상제어신호에 따라 게이트라인을 통해 상기 디스플레이 영역에 공급되는 게이트 신호의 구동시간을 조절하여 상기 화소 소자들로부터 조사되는 광의 휘도가 정상 수준을 유지하도록 하는 게이트 드라이버를 더 구비하는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
- 제1항에 있어서, 상기 휘도 제어부에서 출력되는 휘도편차 보상제어신호에 따라 상기 디스플레이 영역에 공급되는 직류전압의 레벨을 변경하여 상기 화소 소자들로부터 조사되는 광의 휘도가 정상 수준을 유지하도록 하는 직류 직류 변환부를 더 구비하는 것을 특징으로 하는 유기발광다이오드 패널의 휘도 보상 장치.
Priority Applications (3)
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|---|---|---|---|
| US14/369,214 US9552776B2 (en) | 2011-12-30 | 2012-12-26 | Luminance compensation apparatus for organic light emitting diode panel |
| JP2014549985A JP2015505075A (ja) | 2011-12-30 | 2012-12-26 | 有機発光ダイオードパネルの輝度補償装置 |
| CN201280065503.6A CN104025177B (zh) | 2011-12-30 | 2012-12-26 | 有机发光二极管面板的亮度补偿装置 |
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| Application Number | Priority Date | Filing Date | Title |
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| KR10-2011-0147206 | 2011-12-30 | ||
| KR1020110147206A KR101334100B1 (ko) | 2011-12-30 | 2011-12-30 | 유기발광다이오드 패널의 휘도 보상 장치 |
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|---|---|
| US (1) | US9552776B2 (ko) |
| JP (1) | JP2015505075A (ko) |
| KR (1) | KR101334100B1 (ko) |
| CN (1) | CN104025177B (ko) |
| WO (1) | WO2013100545A1 (ko) |
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| KR102542500B1 (ko) * | 2016-07-07 | 2023-06-15 | 삼성디스플레이 주식회사 | 유기전계발광 표시장치 및 그의 구동방법 |
| US10522084B2 (en) * | 2017-05-04 | 2019-12-31 | Apple Inc. | Adaptive pixel voltage compensation for display panels |
| CN107068049B (zh) * | 2017-06-07 | 2020-05-29 | 京东方科技集团股份有限公司 | 图像显示驱动装置、显示装置和电学补偿方法 |
| CN107591425B (zh) * | 2017-08-23 | 2020-02-14 | 深圳市华星光电半导体显示技术有限公司 | Amoled显示面板以及显示装置 |
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Also Published As
| Publication number | Publication date |
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| JP2015505075A (ja) | 2015-02-16 |
| KR20130078328A (ko) | 2013-07-10 |
| CN104025177B (zh) | 2016-09-07 |
| CN104025177A (zh) | 2014-09-03 |
| US9552776B2 (en) | 2017-01-24 |
| KR101334100B1 (ko) | 2013-11-29 |
| US20150042694A1 (en) | 2015-02-12 |
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