WO2019029937A1 - Lichtemittierendes bauteil, lampe sowie verwendung einer lampe und eines lichtemittierenden bauteils - Google Patents
Lichtemittierendes bauteil, lampe sowie verwendung einer lampe und eines lichtemittierenden bauteils Download PDFInfo
- Publication number
- WO2019029937A1 WO2019029937A1 PCT/EP2018/068819 EP2018068819W WO2019029937A1 WO 2019029937 A1 WO2019029937 A1 WO 2019029937A1 EP 2018068819 W EP2018068819 W EP 2018068819W WO 2019029937 A1 WO2019029937 A1 WO 2019029937A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- light source
- emitting component
- mel
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D25/00—Control of light, e.g. intensity, colour or phase
- G05D25/02—Control of light, e.g. intensity, colour or phase characterised by the use of electric means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/40—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors specially adapted for specific vehicle types
- B60Q3/41—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors specially adapted for specific vehicle types for mass transit vehicles, e.g. buses
- B60Q3/43—General lighting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/70—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose
- B60Q3/74—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose for overall compartment lighting; for overall compartment lighting in combination with specific lighting, e.g. room lamps with reading lamps
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
Definitions
- One object to be solved is to specify a light-emitting component which is particularly well-suited for so-called “human-centric lighting", in which the human being in the
- the focus of lighting design is.
- Another object to be solved is to provide a lamp with such a component and the use of such a lamp or such a component
- this includes
- light-emitting component at least four light sources, which are adapted to pairwise light different
- the light sources emit electromagnetic radiation, in particular visible light.
- the dominant wavelength sets one
- the line connecting a point for a particular color and the point for the color of the light source can be extrapolated to meet the outline of the space in two points.
- the point of intersection closer to said color represents the dominant one
- Wavelength of color as the wavelength of pure spectral color at this intersection.
- the dominant wavelengths of the different light sources are in pairs
- At least 15 nm light sources At least 15 nm light sources.
- the light sources may be, for example
- Light emitting diodes organic light emitting diodes and / or laser diodes, act.
- the light sources may also be light-emitting diode chips which are free of a converter or which comprise a converter which converts at least part of the primary radiation generated in a semiconductor body of the light-emitting diode chip into secondary radiation
- the light-emitting component comprises a
- the drive device for operating the light sources.
- the drive device may be, for example, at least one switch with which the operation of the light sources can be controlled.
- the drive device may be a microcontroller or an integrated circuit. The drive device is set up to operate the light sources independently
- the light sources can through the
- Control device for example, to different
- the at least two light sources are operated so that a mixed light of the light of these light sources is emitted from the light-emitting component. This can be achieved for example by the fact that the at least two light sources are operated simultaneously or that the at least two light sources in faster
- the drive device for example, at least one
- Pulse width modulation circuit include or be connected to such.
- the mixed light may be, in particular, white light.
- the drive device is adapted to the m v, mel, D65 _Who t of the mixed light set.
- the m v, mel, D65 value is the melanopic one
- the factor can be used to calculate the corresponding melanopic daylight-equivalent luminous flux for a light source with a photo-optical luminous flux.
- the drive device it is possible to set the m v , mel, D65 _ value of the mixed light. This may mean, for example, that by means of the drive device of
- Control device can be selected from more than two, for example, ten predetermined values. Moreover, it is possible that the control device is adapted to the m v, mel, D65 _Who t of the mixed light ⁇ quasi continuously by controlling the light sources to
- a component is indicated with
- At least four light sources adapted to emit pairs of light of different wavelength ranges
- the drive device is adapted to, the
- the drive device is adapted to set the m v , mel, D65 - value of the mixed light.
- v m, mel With a light emitting device described herein, it is possible to v m, mel, set ⁇ D65 value of the mixed light.
- the at least four light sources comprise a first light source, which is adapted to electromagnetic Emitting radiation having a dominant-dominant wavelength of at least 420 nm and at most 450 nm.
- the first light source emits electromagnetic radiation having a dominant-dominant wavelength of 445 nm.
- the first light source generates light in the deep blue region of the spectrum.
- the light-emitting component is based on the knowledge that a maximum of melanopic
- the first light source is particularly suitable to produce mixed light which a small v m, mel, having D65 ⁇ value and, therefore, has a stimulating effect due to the reduced Melanopsin composition.
- the first light source may in particular be a light-emitting diode or a light-emitting diode chip that is free of a converter. That is, the light of the first
- Light source for example, directly in one
- Semiconductor body generated without any further conversion takes place by a semiconductor body downstream converter.
- the light-emitting component comprises a second light source as one of the at least four light sources, which is configured to emit electromagnetic radiation with a dominant wavelength that is greater than that dominant wavelength of the electromagnetic radiation of the first light source.
- the second one is configured to emit electromagnetic radiation with a dominant wavelength that is greater than that dominant wavelength of the electromagnetic radiation of the first light source.
- Light source is a dominant dominant wavelength of
- the second light source emits light during operation
- the second light source may be a light-emitting diode or a light-emitting diode chip which is free of a converter. That is, the light of the second
- Light source for example, directly in one
- Semiconductor body generated without any further conversion takes place by a semiconductor body downstream converter.
- the light-emitting component comprises a third light source which is set up to emit electromagnetic radiation in the spectral range of green light.
- the third light source is a light source which comprises at least one light-emitting diode chip.
- the light-emitting diode chip comprises a semiconductor body to which a converter is arranged downstream.
- a large part of the electromagnetic radiation generated by the LED chip during operation which may be, for example, UV radiation and / or blue light, is converted by the converter to the green light of the third light source.
- the converter for example, a Phosphor with the designation (phosphor code) GI2 for
- the at least four light sources comprise a fourth light source which is adapted to emit electromagnetic radiation in the spectral range of yellow light and / or the at least four light sources comprise a fourth light source which is adapted to emit electromagnetic radiation in the Spectral range of amber light (also amber) to emit.
- the light-emitting component it is also possible in particular for the light-emitting component to be two fourths
- the fourth light source may also comprise a converter which is used to generate the corresponding colored light
- the drive device is adapted to the m v, mel, D65 ⁇ value of the mixed light in a predetermined range to vary, the color temperature of the mixed light at different m v , mel, D65 ⁇ values from the predetermined
- Range by a maximum of 20% around a mean value
- the change is the
- a light-emitting component described here is based inter alia on the knowledge that the
- the m v , mel, D65 _Wer t of the generated light can be particularly well influenced. It is possible, the change in color temperature due to the use of the first and second light sources of different light power for different m v, mel, D65 ⁇ values by operation of third and fourth light source
- the light-emitting device is operated to generate mixed light having a larger m v, mel, D65 ⁇ value, the first light source with a lower power in comparison with the second light source than For a smaller m v , mel, D65 _Wer t ⁇ It is particularly possible that the first light source is not operated and the second light source is operated to generate the mixed light with the larger m v , mel, D65 _Wer t and for generating mixing light with a small m v, mel, D65 value of the second light source is not operated and the first light source is operated.
- a second light source is used which emits blue light, in particular in a wavelength range of at least 455 nm and at most 480 nm.
- the light-emitting device is operated to generate mixed light having a larger m v, mel, D65 ⁇ value, the third light source having a lower power compared to the second light source than for a smaller m v, mel, D65 _Who t ⁇ That's it
- the third light source is not operated and the second light source is operated and for generating mixed light with a small m v, mel, D65 _ value the second light source is not operated and the third light source is operated.
- the setting is for example of two extreme m v , mel, D65 _ Values, a smallest m v, mel, D65 ⁇ value and a maximum m v, mel, D65 ⁇ value possible in a particularly simple manner by the third or the second light source is operated.
- the change in the color temperature of the mixed light can then by readjustment of the first and / or the fourth
- a second light source is used which emits blue-green light, in particular in a wavelength range of at least 480 nm and at most 505 nm.
- the luminous flux of the mixed light is at least 500 Im, in particular at least 750 Im or at least 1000 Im.
- mixed light with a luminous flux of at least 500 Im can be produced by the light-emitting component. It has been found that light with such a high luminous flux is particularly good for melanopic
- the lamp comprises at least one light-emitting component described here, so that all for the light-emitting component
- the lamp is in particular adapted to emit light with a luminous flux of at least 500 Im, in particular at least 750 Im or at least 1000 Im.
- the light may be composed of the mixed light of two or more of the light-emitting components of the lamp, so that the individual components are not set up need to produce mixed light with a luminous flux of at least 500 Im.
- the described lamp or a component described here can be used in particular for general lighting or for illuminating the interior of a means of transport.
- the means of transport may be, for example, a
- Motor vehicle a bus, a railroad car, a
- Airplane a boat, a submarine, a helicopter or something similar.
- the lamp is suitable for example for use in a work environment in which the lamp with a high m v, mel, D65 ⁇ value can be used if special concentration
- the lamp v with the lowest possible m, mel it is possible to use the lamp v with the lowest possible m, mel to operate D65 _ value.
- the m v, mel, D65 _Wer t of the light generated by the lamp over the flight time can be gradually brought to the m v , mel, D65 _Wer t of daylight at the destination.
- the course of daylight can be recaptured. This can do that Improve well-being, improve sleep at night and improve daytime performance.
- FIGS. 1A and 1B show exemplary embodiments of light-emitting components described here in schematic representations.
- Figures 2A and 2B show exemplary embodiments of lamps described here in a schematic representation.
- FIG. 1A shows a schematic plan view of a
- the light emitting device 100 The light emitting device 100.
- Component 100 comprises four light sources 1 with a first light source 11, a second light source 12, a third light source 13 and a fourth light source 14.
- the first light source 11 generates during operation
- electromagnetic radiation having a dominant dominant wavelength of at most 450 nm, for example 445 nm.
- the second light source 12 generates during operation
- the second light source generates
- electromagnetic radiation having a dominant wavelength of at least 480 nm and at most 505 nm or
- electromagnetic radiation having a dominant wavelength of at least 455 nm and at most 470 nm.
- the third light source 13 generates green light during operation.
- the fourth light source 14 generates yellow and / or amber light during operation.
- the light-emitting device 100 of the embodiment of FIG. 1A further comprises a driving device 2 adapted to operate the light sources 1 independently
- the mixed light is generated by additive light mixing.
- Emit wavelength ranges a particularly large dynamics is possible, that is, it can be generated in particular white mixed light from a large color temperature range. It has been shown that the excitation of melanopsin production can be varied by using two different light sources, each generating blue light, the first light source and the second light source.
- the drive device 2 is set up to operate the light sources 1 independently of one another, such that the light from at least two of the light sources mixes into a mixed light whose
- mv, mel, D65 ⁇ value is adjustable by means of the drive device.
- the drive device 2 can be located inside the light-emitting component, for example, on a support or in a housing. It is beyond that
- the drive device 2 is arranged away from the light sources.
- the light sources 1 can each be light-emitting diodes.
- the third light source 13 comprises a semiconductor body to which a first converter 13a is arranged downstream.
- Semiconductor body generated electromagnetic radiation is converted by the converter 13a, for example, in green light.
- the fourth light source 14 comprises a semiconductor body with a second converter 14a, whereby from the fourth
- Light source 14 yellow or amber light
- the drive device 2 may for example be integrated in a housing 3 of the light-emitting component.
- the drive device is then an integrated circuit or a circuit
- FIG. 2A shows in a schematic representation a lamp described here with two of the light-emitting components 100 described here.
- the lamp can
- Interior lighting in a means of transport such as a motor vehicle, use find. This is shown schematically in FIG. 2B.
- the graph of FIG. 3A shows the spectrum of light sources 1 for an embodiment of the present invention
- the curve ⁇ ] _ ] _ shows the light generated by the first light source having a dominant wavelength P] _i.
- the dominant wavelength P] _i is, for example, in the short-wave blue range at approximately 445 nm.
- the curve ⁇ ] _2 with a dominant wavelength P] _2 shows that of the second light source, in which the dominant one
- Wavelength P] _2 for example, at 465 nm.
- the light-emitting component comprises a third
- Light sources 11, 12 the generation of mixed light with a different m v , mel, D65 ⁇ value. This in turn allows different levels of melanopsin stimulation without
- the fourth light source characterized by the curve ⁇ ] _4
- the fourth light source is a light source that
- Figure 3C describes a light-emitting device in which emitted the second light source, indicated by the curve ⁇ ] _2, blue-green light (also verde) having a dominant wavelength P] _2 of 505 nm , It can be seen that the long-wave green light of the curve ⁇ ] _3 outside the
- Stimulation curve S me ] _ ( ⁇ ) is.
- the short-wave blue-green light of the curve ⁇ ] _2 is close to the maximum of
- FIG. 3D describes a light-emitting component in which the fourth light source, characterized by the curve [ lambda ] _4, emits amber light.
- Curve 4A shows the spectrum of a mixed light
- the curve Mix shown in FIG. 4A represents white mixed light with a color temperature of 4000 K and a color rendering index of 82 at a m v , mel, D65 value of 0.54. This is achieved in that the first light source 11 is operated and the second light source 12 is not operated.
- the DTC value of the PWM circuit with which the light sources 1 are operated has the following values for the light sources 1:
- the third light source 13 generates green light and the fourth light source 14 generates yellow light.
- Figure 4B shows the Figure 4A corresponding spectra for white mixed light with a color temperature of 4000 K and a color rendering index of 89 at a m v, mel, D65 _Who t of 0.68.
- the first light source 11 is not operated and the second light source 12 is operated.
- the DTC value of the PWM circuit with which light sources 1 are operated has the following values for the light sources:
- FIG. 5A shows a spectrum of the mixed light for white light at a color temperature of 2700 K and a
- Color rendering index of 81 according to the spectrum of Figure 3A as a curve "mix".
- a m v , mel, D65 _Wer t of 0.35 set.
- the DTC value of the PWM circuit with which the light sources 1 are operated has the following values for the light sources 1:
- Color temperature of 6400 K and a color rendering index of 72 is a m v , mel, D65 _Wer t of 0.99 set.
- the DTC value of the PWM circuit with which the light sources 1 are operated has the following values for the light sources 1:
- the m v, mel in the case that the color temperature is not kept constant, it is possible with a herein described light emitting component, the m v, mel to vary D65 ⁇ value over a very large area, wherein in the present example, a dynamic factor of the cool white light to the warm white light of 2.8 is possible.
- Curve 6A shows the spectrum of a mixed light
- the curve Mix shown in FIG. 6A represents white mixed light with a color temperature of 2700 K. and a color rendering index of 81 at an m v , mel, D65 value of 0.35.
- the DTC value of the PWM circuit with which the light sources 1 are operated has the following values for the light sources 1:
- the third light source 13 generates green light and the fourth light source 14 generates yellow light.
- Figure 6B shows the, Figure 6A corresponding spectra for white mixed light with a color temperature of 6400 K and a color rendering index of 72 at a m v, mel ⁇ D65 value of 1.17.
- the third light source 13 is not operated and the second light source 12 is operated.
- the DTC value of the PWM circuit with which the light sources 1 are operated has the following values for the light sources 1:
- the second light source is a blue-green light source.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Led Device Packages (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020217030997A KR102432827B1 (ko) | 2017-08-11 | 2018-07-11 | 발광 부품, 램프 및 램프와 발광 부품의 용도 |
| JP2020507613A JP7026774B2 (ja) | 2017-08-11 | 2018-07-11 | 発光部品、ランプならびにランプおよび発光部品の使用 |
| US16/636,589 US11334098B2 (en) | 2017-08-11 | 2018-07-11 | Light-emitting component, lamp and use of a lamp and a light-emitting component |
| KR1020207004604A KR102308757B1 (ko) | 2017-08-11 | 2018-07-11 | 발광 부품, 램프 및 램프와 발광 부품의 용도 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017118339.6 | 2017-08-11 | ||
| DE102017118339.6A DE102017118339A1 (de) | 2017-08-11 | 2017-08-11 | Lichtemittierendes Bauteil, Lampe sowie Verwendung einer Lampe und eines lichtemittierenden Bauteils |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019029937A1 true WO2019029937A1 (de) | 2019-02-14 |
Family
ID=62916653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2018/068819 Ceased WO2019029937A1 (de) | 2017-08-11 | 2018-07-11 | Lichtemittierendes bauteil, lampe sowie verwendung einer lampe und eines lichtemittierenden bauteils |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11334098B2 (de) |
| JP (1) | JP7026774B2 (de) |
| KR (2) | KR102308757B1 (de) |
| DE (1) | DE102017118339A1 (de) |
| WO (1) | WO2019029937A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7448829B2 (ja) | 2021-10-21 | 2024-03-13 | 日亜化学工業株式会社 | 照明装置 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20110279015A1 (en) * | 2010-05-13 | 2011-11-17 | Cree, Inc. | Lighting device and method of making |
| WO2012167107A1 (en) * | 2011-06-01 | 2012-12-06 | B/E Aerospace, Inc. | Vehicle led reading light grouping system and method |
| US20130002157A1 (en) * | 2011-03-03 | 2013-01-03 | Van De Ven Antony P | Semiconductor Light Emitting Devices Having Selectable and/or Adjustable Color Points and Related Methods |
| US20140184088A1 (en) * | 2012-12-28 | 2014-07-03 | Industrial Technology Research Institute | Light source apparatus |
| WO2017131715A1 (en) * | 2016-01-28 | 2017-08-03 | Ecosense Lighting Inc. | Methods for generating melatonin-response-tuned white light with high color rendering |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6513949B1 (en) * | 1999-12-02 | 2003-02-04 | Koninklijke Philips Electronics N.V. | LED/phosphor-LED hybrid lighting systems |
| JP3940596B2 (ja) | 2001-05-24 | 2007-07-04 | 松下電器産業株式会社 | 照明光源 |
| WO2009133676A1 (ja) | 2008-04-28 | 2009-11-05 | パナソニック株式会社 | 蛍光ランプ |
| JP2010162214A (ja) | 2009-01-16 | 2010-07-29 | Kagoshima Univ | 光照射装置 |
| DE102010055265A1 (de) | 2010-12-20 | 2012-06-21 | Osram Opto Semiconductors Gmbh | Optoelektronisches Halbleiterbauteil |
| DE102013111662A1 (de) * | 2013-10-23 | 2015-04-23 | Vossloh-Schwabe Optoelectronic Gmbh & Co. Kg | Beleuchtungsvorrichtung und Verfahren zu deren Betrieb |
| DE102015209603A1 (de) * | 2014-11-26 | 2016-06-02 | Volkswagen Aktiengesellschaft | Vorrichtung zur Durchführung einer Lichttherapie in einem Fahrzeug |
| US9493112B2 (en) * | 2014-12-08 | 2016-11-15 | The Boeing Company | Ambient lighting system to mitigate the impact of travel across time zones |
| RU2700375C2 (ru) * | 2015-03-19 | 2019-09-16 | Филипс Лайтинг Холдинг Б.В. | Биологическая цветная лампа |
| DE102017130864A1 (de) * | 2017-12-21 | 2019-06-27 | Ledvance Gmbh | Beleuchtungsvorrichtung, Steuereinheit für eine Beleuchtungsvorrichtung und Verfahren zum Betreiben einer Beleuchtungsvorrichtung |
-
2017
- 2017-08-11 DE DE102017118339.6A patent/DE102017118339A1/de active Pending
-
2018
- 2018-07-11 WO PCT/EP2018/068819 patent/WO2019029937A1/de not_active Ceased
- 2018-07-11 JP JP2020507613A patent/JP7026774B2/ja active Active
- 2018-07-11 KR KR1020207004604A patent/KR102308757B1/ko active Active
- 2018-07-11 US US16/636,589 patent/US11334098B2/en active Active
- 2018-07-11 KR KR1020217030997A patent/KR102432827B1/ko active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110279015A1 (en) * | 2010-05-13 | 2011-11-17 | Cree, Inc. | Lighting device and method of making |
| US20130002157A1 (en) * | 2011-03-03 | 2013-01-03 | Van De Ven Antony P | Semiconductor Light Emitting Devices Having Selectable and/or Adjustable Color Points and Related Methods |
| WO2012167107A1 (en) * | 2011-06-01 | 2012-12-06 | B/E Aerospace, Inc. | Vehicle led reading light grouping system and method |
| US20140184088A1 (en) * | 2012-12-28 | 2014-07-03 | Industrial Technology Research Institute | Light source apparatus |
| WO2017131715A1 (en) * | 2016-01-28 | 2017-08-03 | Ecosense Lighting Inc. | Methods for generating melatonin-response-tuned white light with high color rendering |
Non-Patent Citations (1)
| Title |
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| DIETERLANG|OSRAMGMBH: "Daylight-RelatedMetrics as prerequisite for assessment of light quality and for lighting design HumanCentricLighting", 13 October 2016 (2016-10-13), pages 1 - 25, XP055514702, Retrieved from the Internet <URL:http://lightingforpeople.eu/2016/wp-content/uploads/2016/10/Day-light-related-metrics-for-human-centric-lighting.pdf> [retrieved on 20181012] * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7026774B2 (ja) | 2022-02-28 |
| US11334098B2 (en) | 2022-05-17 |
| KR20210119587A (ko) | 2021-10-05 |
| US20200290508A1 (en) | 2020-09-17 |
| KR102432827B1 (ko) | 2022-08-12 |
| JP2020529723A (ja) | 2020-10-08 |
| DE102017118339A1 (de) | 2019-02-14 |
| KR20200029562A (ko) | 2020-03-18 |
| KR102308757B1 (ko) | 2021-10-01 |
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