WO2016076498A1 - Antenne cadre de type bobine pour dispositif mobile - Google Patents

Antenne cadre de type bobine pour dispositif mobile Download PDF

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Publication number
WO2016076498A1
WO2016076498A1 PCT/KR2015/005730 KR2015005730W WO2016076498A1 WO 2016076498 A1 WO2016076498 A1 WO 2016076498A1 KR 2015005730 W KR2015005730 W KR 2015005730W WO 2016076498 A1 WO2016076498 A1 WO 2016076498A1
Authority
WO
WIPO (PCT)
Prior art keywords
coil
antenna
magnetic field
loop antenna
mobile device
Prior art date
Application number
PCT/KR2015/005730
Other languages
English (en)
Korean (ko)
Inventor
이승재
Original Assignee
주식회사 에이치시티엠
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from KR1020150038435A external-priority patent/KR101673240B1/ko
Application filed by 주식회사 에이치시티엠 filed Critical 주식회사 에이치시티엠
Priority to US15/526,350 priority Critical patent/US20170352951A1/en
Priority to CN201580061880.6A priority patent/CN107112635A/zh
Publication of WO2016076498A1 publication Critical patent/WO2016076498A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Definitions

  • the present invention relates to a mobile device having a coil loop antenna, and more particularly, to minimize radio wave interference according to material characteristics of a case by installing an antenna on the outer side of a reserver or a speaker in which a permanent magnet of the mobile device is installed.
  • the present invention relates to a coil type loop antenna for a mobile device, which can improve antenna transmission / reception efficiency by using a magnetic field of a permanent magnet, and can miniaturize a product by reducing a required volume according to antenna installation.
  • a mobile device is a device capable of exchanging signals such as voice, video, and data with a desired counterpart while moving mobile communication to a terminal for a user to use.
  • These mobile devices add additional functions such as e-books, MP3s, cameras, recorders, scanners, multimedia players, game consoles, etc., in addition to actual communication, and have recently been improved as smartphones by adding tablet computer functions.
  • the device is on the market.
  • the mobile device is equipped with the NFC function that can be applied for contactless credit card, electronic payment, identity verification, etc.
  • NFC should be equipped with an antenna because it uses the radio signal of the frequency band specified by a specific standard.
  • the antenna uses a loop antenna pattern.
  • NFC Near Field Communication
  • RFID contactless RFID
  • NFC reads the information recorded in the memory of the tag attached to each product, article, etc. in read mode, so you can check the history, contents, etc. of the product or article, or operate it in P2P mode.
  • P2P mode By communicating, it is necessary to configure the electronic circuits and the antennas of the transmitting side and the receiving side to enable recognition operations while exchanging signals with each other at radio frequencies in a specific frequency band.
  • an internal antenna connected to the main board of the mobile device is installed inside the mobile device.
  • the antenna installed inside the mobile device is installed in the rear case spaced apart from the internal electronic components to minimize signal interference with the electronic components installed therein.
  • the loop antenna of the prior art in which the antenna is installed in the rear case, has to be secured in consideration of the required volume of the antenna at the time of manufacture of the case. It was hard to let.
  • the loop antenna of the prior art has a structure in which the antenna is located inside the case, and there is a problem in that the production cost is increased by installing various components used for the antenna.
  • the present invention has been invented to improve the above problems, the problem to be solved by the present invention, the coil around the outside of the speaker of the mobile device by installing a loop antenna to transmit and receive efficiency using the permanent magnet of the speaker It is possible to provide a coiled loop antenna for a mobile device, which can improve the performance and reduce the required volume according to the antenna installation.
  • the coil-type loop antenna for a mobile device is installed in a mobile device and disposed in the form of a coil wound on the outer surface of the housing of the permanent magnet structure including a permanent magnet therein. Includes an antenna coil.
  • the permanent magnet structure may be a speaker.
  • the permanent magnet structure may be a receiver.
  • the outer surface of the housing may be wound around the outer circumferential surface of the antenna coil surrounding the outer circumference of the permanent magnet structure.
  • the outer surface of the housing is the upper surface
  • the antenna coil may be wound on the upper surface of the permanent magnet structure.
  • the outer surface of the housing is a lower surface
  • the antenna coil may be wound on the lower surface of the permanent magnet structure.
  • the outer surface of the housing may be an outer circumferential surface, and the antenna coil may be wound around a portion of the housing, and a magnetic field derivative may be provided on the remaining portion of the outer circumferential surface.
  • the outer surface of the housing is provided with the antenna coil to be wound to surround the outer periphery of the permanent magnet structure to the outer peripheral surface, a portion of the outer surface of the housing between the outer peripheral surface of the housing and the antenna coil
  • the enveloping magnetic field conductor may be arranged.
  • the magnetic field conductor may be made of metal.
  • the magnetic field conductor may be provided as a ferrite.
  • the magnetic field inductor may be provided with magnetic rubber.
  • the antenna is provided outside the speaker of the mobile device, and the antenna volume is required as the antenna is constructed using the magnetic field of the permanent magnet of the speaker. It can reduce the size of the product.
  • the coil loop antenna for a mobile device of the present invention by implementing a loop antenna for transmitting and receiving the signal when the NFC using a magnetic field of the permanent magnet installed in the speaker by minimizing the radio wave interference of the metal case, the antenna Receiving efficiency is improved to improve performance.
  • the influence of the interference can be minimized by using the magnetic field of the permanent magnet of the speaker, thereby maintaining the transmission and reception performance of the NFC signal.
  • the coil loop antenna for a mobile device serves as an antenna by a magnetic field generated by winding an antenna coil in a coil form wound around a speaker, and utilizes a space where a speaker is installed. Therefore, the required volume of the antenna can be simplified, which saves the space of the mobile device, thereby miniaturizing the product.
  • FIG. 1 is a use state diagram showing a state in which a coil type loop antenna for a mobile device according to a first embodiment of the present invention is installed.
  • FIG. 2 is a perspective view illustrating a main part of the coil type loop antenna for a mobile device of FIG. 1.
  • FIG. 3 is an operation front view illustrating an operating state of the coiled loop antenna for a mobile device of FIG. 1.
  • FIG. 4 is an operation perspective view illustrating an operating state of the coiled loop antenna for a mobile device of FIG. 1.
  • FIG. 5 is a cross-sectional view illustrating an operating state of a coiled loop antenna for a mobile device of FIG. 1.
  • FIG. 6 is a cross-sectional view illustrating a coil-type loop antenna for a mobile device according to a second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view illustrating a coil-type loop antenna for a mobile device according to a third embodiment of the present invention.
  • FIG. 8 is a cross-sectional view illustrating a coil-type loop antenna for a mobile device according to a fourth embodiment of the present invention.
  • FIG. 9 is a cross-sectional view illustrating a coil-type loop antenna for a mobile device according to a fifth embodiment of the present invention.
  • loop antenna 110 antenna coil
  • coil connection 120 magnetic field conductor
  • FIG. 1 is a use state diagram showing a state in which a coil type loop antenna for a mobile device according to an embodiment of the present invention is installed
  • FIG. 2 is a perspective view showing a main part in which the coil type loop antenna for a mobile device is installed in FIG. 1
  • FIG. 3 is an operation front view showing an operating state of the coiled loop antenna for a mobile device of Figure 1
  • Figure 4 is an operating perspective view showing an operating state of the coiled loop antenna for a mobile device of Figure 1
  • Figure 5 is a mobile of FIG. It is sectional drawing which shows the operation state of the coiled loop antenna for equipment.
  • a coil type loop antenna 100 for a mobile device includes a speaker 20 having a permanent magnet 22 among components installed in the mobile device 1. It is installed in the periphery of) to transmit and receive signals while mutually resonating with the NFC signal.
  • the speaker 20 is presented for one example of a permanent magnet structure in which the permanent magnet 22 is installed in the mobile device 1, which is for convenience of description.
  • Coil-type loop antenna 100 for a mobile device can be applied to all parts in which the permanent magnet 22 is installed in the mobile device (1).
  • the coil type loop antenna 100 for a mobile device may include a configuration in which the permanent magnet 22 is installed in a reserver installed therein.
  • the coiled loop antenna 100 for a mobile device may be installed and used in a receiver.
  • the speaker 20 installed in the mobile device 1 is provided with a housing 21 at a portion at which a voice is output on one side of the case 10.
  • a permanent magnet 22 wrapped around the speaker coil 23 is installed to resonate the diaphragm 24 when the voice output.
  • the other side of the housing 21 is provided with a gasket 25 to protect the inside while passing the voice so that the voice generated by the resonance of the diaphragm 24 is transmitted to the outside.
  • the speaker 20 When the speaker 20 applies a signal suitable for the voice to the speaker coil 23 within the magnetic field generated by the permanent magnet 22, the speaker 20 vibrates the diaphragm 24 and outputs the voice, and the output voice is a gasket ( It is emitted outside through 25) and the user can recognize the voice.
  • the permanent magnet 22 provided in the speaker 20 forms a magnetic field region in order for the signals with the speaker coil 23 to mutually resonate in order to vibrate the diaphragm 24. Accordingly, when the coiled loop antenna 100 is installed around the housing 21, when the coiled loop antenna 100 generates a magnetic field in the magnetic field formed by the permanent magnet 22, the magnetic fields cause mutual synergy. Transceiver efficiency can be improved.
  • the coil loop antenna 100 is installed in the magnetic field of the permanent magnet 22, and the strength of the magnetic field generated when a signal of a specific frequency band resonates with the NFC signal is amplified so that the coil loop antenna 100 is amplified. Transmit / receive efficiency may be improved.
  • the coil loop antenna 100 is installed on the outer surface of the speaker 20 in which the permanent magnet 22 is installed in the form of a coil, and the magnetic field in the antenna coil 110 within the magnetic field generated by the permanent magnet 22. As is generated, it is possible to minimize the signal interference of the metal case 10 by maximizing the transmission and reception efficiency of the NFC signal.
  • Such a coil type loop antenna 100 for a mobile device includes an antenna coil 110 disposed in the form of a coil wound a plurality of times around the outer circumference of the housing 21.
  • the antenna coil 110 is wound and installed around the outer circumference of the housing 21 in which the permanent magnet 22 is installed, and when the power is applied, the antenna coil 110 transmits and receives signals during the NFC in the magnetic field of the permanent magnet 22. As the magnetic field is generated, the strength of the generated magnetic field is amplified, thereby minimizing the influence on the external interference and improving the transmission and reception efficiency of the NFC signal.
  • the antenna coil 110 can adjust the frequency according to the number of turns wound around the outer circumference of the housing 21 of the speaker 20. Accordingly, when a specific frequency band desired by the user is determined, the number of turns of the antenna coil 110 is determined in consideration of the size of the magnetic field formed by the diameter of the housing 21 and the strength of the household generated in the permanent magnet 22. Can be determined and installed.
  • the magnetic field generated from the antenna coil 110 serves as a loop antenna for transmitting and receiving signals during the NFC. Accordingly, it is desirable to adjust the number of turns according to a specific frequency band that may be mutually resonant with the NFC signal.
  • the coiled loop antenna 100 is installed by winding the antenna coil 110 around the outer circumference of the housing 21 in which the permanent magnet 22 is installed therein, and is easy to install and has a simple structure.
  • the coil loop antenna 100 can extend the application range as it can adjust the frequency band that is mutually resonant according to the number of turns of the antenna coil (110).
  • both ends of the antenna coil 110 may be provided with a coil connector 111 connected to a control circuit (not shown) installed inside the case 10 of the mobile device 1.
  • the coil connector 111 may be installed to electrically connect the antenna coil 110 and the control circuit to apply power at the time of transmitting and receiving the NFC signal, and to transmit the signal transmitted and received by mutual resonance.
  • FIG. 6 is a cross-sectional view illustrating a coil-type loop antenna for a mobile device according to a second embodiment of the present invention.
  • the coil-type loop antenna 100 for a mobile device is defined as an upper portion in a direction in which the gasket 25 of the housing 21 is installed, and an upper portion of the gasket 25.
  • Antenna coil 110 is disposed in the form of a coil wound on the surface a plurality of times.
  • the antenna coil 110 may be formed according to the magnetic field shape of the permanent magnet 22 to amplify the magnetic field generated in the permanent magnet 22 on the upper surface of the housing 21 in which the permanent magnet 22 is installed. It is installed to be wound in a set size. As such, the antenna coil 110 is wound around the upper surface of the housing 21 and installed when electric power is applied, thereby generating a magnetic field for transmitting and receiving signals in the field of the permanent magnet 22.
  • the intensity of the signal may be amplified to improve the transmission and reception efficiency of the NFC signal while minimizing the influence on external interference.
  • both ends of the antenna coil 110 may be provided with a coil connector 111 connected to the control circuit installed in the case 10 of the mobile device (1).
  • the coil connector 111 may be installed to electrically connect the antenna coil 110 and the control circuit to apply power at the time of transmitting and receiving the NFC signal, and to transmit the signal transmitted and received by mutual resonance.
  • FIG. 7 is a cross-sectional view illustrating a coil-type loop antenna for a mobile device according to a third embodiment of the present invention.
  • the coil type loop antenna 100 for a mobile device defines a direction opposite to a direction in which a gasket of the housing 21 is installed as a lower direction, and the housing 21.
  • the antenna coil 110 is disposed in the form of a coil wound a plurality of times on the lower surface of the.
  • the antenna coil 110 considers the magnetic field shape of the permanent magnet 22 to amplify the magnetic field generated in the permanent magnet 22 on the lower surface of the housing 21 in which the permanent magnet 22 is installed therein. It is installed to be wound to a predetermined size. As such, the antenna coil 110 is wound around the lower surface of the housing 21, and when electric power is applied, a magnetic field generated by generating a magnetic field for transmitting and receiving signals in the magnetic field of the permanent magnet 22. The intensity of the signal may be amplified to improve the transmission and reception efficiency of the NFC signal while minimizing the influence on external interference.
  • both ends of the antenna coil 110 may be provided with a coil connector 111 connected to the control circuit installed in the case 10 of the mobile device (1).
  • the coil connector 111 may be installed to electrically connect the antenna coil 110 and the control circuit to apply power at the time of transmitting and receiving the NFC signal, and to transmit the signal transmitted and received by mutual resonance.
  • FIG. 8 is a cross-sectional view illustrating a coil-type loop antenna for a mobile device according to a fourth embodiment of the present invention.
  • the coil type loop antenna 100 for a mobile device includes an antenna coil 110 and a magnetic field conductor 120 surrounding a portion of an outer circumference of the housing 21. do.
  • the antenna coil 110 is provided in the form of a coil wound a plurality of times to surround a portion of the housing 21 from the center to the upper circumference.
  • the antenna coil 110 generates a magnetic field as the magnetic field of the permanent magnet 22 installed in the housing 21 is induced to the magnetic field conductor 120 due to the application of electric power to the outer circumference of the housing 21. It is possible to improve the transmission and reception efficiency of the signal.
  • both ends of the antenna coil 110 may be provided with a coil connector 111 connected to the control circuit installed in the case 10 of the mobile device (1).
  • the coil connector 111 may be installed to electrically connect the antenna coil 110 and the control circuit to apply power at the time of transmitting and receiving the NFC signal, and to transmit the signal transmitted and received by mutual resonance.
  • the magnetic field conductor 120 is provided on the outer circumferential surface of the housing 21 to surround the remaining portions away from the antenna coil 110 from each other in the center to be installed to induce a magnetic field generated in the antenna coil 110. .
  • the magnetic field conductor 120 is provided on a portion of the antenna coil 110 in which the antenna coil 110 is not installed in the downward direction of the center from the outer circumference of the housing 21 so as not to overlap each other in order to induce the magnetic field of the antenna coil 110.
  • the magnetic field conductor 120 may be made of a material that improves the generation efficiency of the magnetic field generated by the current applied to the antenna coil 110 to improve the generation efficiency of the magnetic field.
  • the magnetic field conductor 120 is made of a material that can induce a magnetic field when the coil coil antenna coil 110 is applied with power.
  • the magnetic field conductor 120 is made of metal, a magnetic material ferrite ( ferrite) and magnetic rubber, which is an absorbent material absorbing shock while having magnetic force, may be selected and configured.
  • the antenna coil 110 and the magnetic field conductor 120 is installed from the center to the top of the antenna coil 110 so as not to overlap each other around the outer periphery of the housing 21, the magnetic field conductor 120 from the center to the lower direction Is installed.
  • the antenna coil 110 and the magnetic field conductor 120 are installed on the outer circumference of the housing 21 so as not to overlap each other in a predetermined area to set the direction in which the magnetic field is induced while inducing a magnetic field generated in the antenna coil 110. Can be.
  • FIG. 9 is a cross-sectional view illustrating a coil-type loop antenna for a mobile device according to a fifth embodiment of the present invention.
  • the coil type loop antenna 100 for a mobile device includes a magnetic field conductor 120 installed around an outer circumference of the housing 21, and an antenna coil 110. .
  • the antenna coil 110 is provided in the form of a coil wound around the outside of the housing a plurality of times.
  • the antenna coil 110 generates a magnetic field by inducing a magnetic field into the magnetic field conductor 120 within the magnetic field of the permanent magnet 22 installed inside the housing 21 due to the application of electric power to the outer circumference of the housing 21. Accordingly, the efficiency of transmitting and receiving an NFC signal can be improved.
  • both ends of the antenna coil 110 may be provided with a coil connector 111 connected to the control circuit installed in the case 10 of the mobile device (1).
  • the coil connector 111 may be installed to electrically connect the antenna coil 110 and the control circuit to apply power at the time of transmitting and receiving the NFC signal, and to transmit the signal transmitted and received by mutual resonance.
  • the magnetic field conductor 120 is disposed between the outer circumference of the housing 21 and the antenna coil 110, and is installed to surround a portion of the outer circumference of the housing 21.
  • the magnetic field conductor 120 may be installed of a material that improves the generation efficiency of the magnetic field generated by the current applied to the antenna coil 110, thereby improving the magnetic field generation efficiency.
  • the magnetic field conductor 120 is made of a material that can induce a magnetic field when the coil coil antenna coil 110 is applied with power.
  • the magnetic field conductor 120 is made of metal, a magnetic material ferrite ( ferrite) and magnetic rubber, which is an absorbent material absorbing shock while having magnetic force, may be selected and configured.
  • the antenna coil 110 and the magnetic field conductor 120 is provided so as to surround the magnetic field conductor 120 in the outer circumference of the housing 21 so as to overlap each other on the outer circumference of the housing 21, the magnetic field conductor 120 of the The outer circumference of the antenna coil 110 is installed to be wound multiple times.
  • the magnetic field conductor 120 and the antenna coil 110 are sequentially installed on the outer circumference of the housing 21 so as to sequentially overlap each other, thereby inducing a magnetic field generated by the antenna coil 110 to improve generation efficiency.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Support Of Aerials (AREA)
  • Near-Field Transmission Systems (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention concerne une antenne cadre de type bobine pour un dispositif mobile. Une antenne cadre de type bobine pour un dispositif mobile selon un mode de réalisation de la présente invention est installée dans un dispositif mobile et comprend une bobine d'antenne qui est arrangée sous la forme d'une bobine enroulée autour de la surface extérieure d'un boîtier d'une structure à aimant permanent à l'intérieur de laquelle se trouve un aimant permanent.
PCT/KR2015/005730 2014-11-13 2015-06-08 Antenne cadre de type bobine pour dispositif mobile WO2016076498A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/526,350 US20170352951A1 (en) 2014-11-13 2015-06-08 Coil-type loop antenna for mobile device
CN201580061880.6A CN107112635A (zh) 2014-11-13 2015-06-08 移动设备用线圈型环形天线

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20140158206 2014-11-13
KR10-2014-0158206 2014-11-13
KR10-2015-0038435 2015-03-19
KR1020150038435A KR101673240B1 (ko) 2014-11-13 2015-03-19 모바일 기기용 영구자석 구조물

Publications (1)

Publication Number Publication Date
WO2016076498A1 true WO2016076498A1 (fr) 2016-05-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2015/005730 WO2016076498A1 (fr) 2014-11-13 2015-06-08 Antenne cadre de type bobine pour dispositif mobile

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WO (1) WO2016076498A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11757490B2 (en) 2018-08-02 2023-09-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V Data transmission from a user terminal to another apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100714617B1 (ko) * 2006-05-08 2007-05-07 삼성전기주식회사 박형 스피커를 갖는 내장 안테나 모듈
KR20090067503A (ko) * 2007-12-21 2009-06-25 에스텍 주식회사 안테나 일체형 스피커
JP2009152714A (ja) * 2007-12-19 2009-07-09 Sony Corp Ｒｆｉｄ用アンテナおよびアンテナコイルの製造方法
US20130149963A1 (en) * 2011-11-14 2013-06-13 Daisaku Kitagawa Communication device performing medium detection by near field communication, external device, and external medium communication system
KR20140011755A (ko) * 2012-07-19 2014-01-29 차승일 무선충전 시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100714617B1 (ko) * 2006-05-08 2007-05-07 삼성전기주식회사 박형 스피커를 갖는 내장 안테나 모듈
JP2009152714A (ja) * 2007-12-19 2009-07-09 Sony Corp Ｒｆｉｄ用アンテナおよびアンテナコイルの製造方法
KR20090067503A (ko) * 2007-12-21 2009-06-25 에스텍 주식회사 안테나 일체형 스피커
US20130149963A1 (en) * 2011-11-14 2013-06-13 Daisaku Kitagawa Communication device performing medium detection by near field communication, external device, and external medium communication system
KR20140011755A (ko) * 2012-07-19 2014-01-29 차승일 무선충전 시스템

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11757490B2 (en) 2018-08-02 2023-09-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V Data transmission from a user terminal to another apparatus

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