baber/WOPTO huggingface dataset:
Patent KR-20170118739-A (KR)
Title: 미다공 플라스틱 필름의 제조 방법
Inventor: ICHINOMIYA TAKASHI
IPC: H01M50/443
Filed: 2016-01-22
Abstract: 습식 롤러 연신법에 있어서도 미끄러짐을 방지함으로써 높은 생산성을 바탕으로 우수한 물성 및 기계적 성질을 갖는 미다공 플라스틱 필름의 제조 방법을 제공한다. 본 발명의 미다공 플라스틱 필름의 제조 방법은 희석제와 폴리올레핀 수지를 압출기로 혼련하고, 이 희석제가 혼련된 폴리머를 구금으로부터 시트상으로 토출하고, 이 구금으로부터 토출된 시트를 드럼 상에서 냉각하여 고화한 후, 이 고화된 시트를 다시 가열하여 복수의 롤러에 의해 시트의 반송방향으로 연신하고, 이 시트의 반송방향으로 연신한 시트를 냉각한 후에 시트 양단을 클립으로 파지하여 텐터에 도입하고, 그 후 희석제를 세정함으로써 1축 또는 2축 연신 미다공 플라스틱 필름을 얻는 제조 방법에 있어서, 상기 복수의 롤러 중 적어도 2개 이상 모터에 의해 구동되고, 상기 모터에 의해 구동되는 롤러 중 적어도 2개의 롤러(A) 및 롤러(B)의 표면을 상기 시트의 상기 드럼과 접촉한 면과는 반대측의 면과 접촉시키고 상기 롤러(A) 및 롤러(B)의 회전 속도를 실질적으로 이들 2개의 롤러 사이에서 시트를 연신할 수 있도록 제어한다
Patent KR-20170137050-A (KR)
Title: 2개의 기판을 결합하기 위한 기판 홀더 및 방법.
Inventor: WAGENLEITNER THOMAS
IPC: H01L21/18
Filed: 2015-04-10
Abstract: 기판(11, 11')을 고정하기 위한 고정 표면(4o)을 갖는 기판 홀더(1, 1', 1", 1"', 1 IV )가 제안된다.
Patent KR-20170117489-A (KR)
Title: 트라이사이클릭 화합물 및 의약에서 이의 용도
Inventor: WANG XIAOJUN
IPC: A61K31/4353
Filed: 2016-02-05
Abstract: 본 발명은 FXR에 결합하고 FXR의 조절제로서 작용할 수 있는 신규한 트라이사이클릭 화합물, 또는 이의 입체이성질체, 기하이성질체, 호변이성질체, N-옥사이드, 수화물, 용매화물, 대사산물, 약학적으로 허용되는 염 또는 전구약물, 및 FXR에 의해 매개된 질병 및/또는 질환의 치료를 위한 화합물의 용도에 관한 것이다.  본 발명은 또한 본원에 개시된 화합물을 함유하는 약학 조성물 및 상기 화합물 또는 약학 조성물을 투여하는 단계를 포함하는, FXR에 의해 매개된 질병 및/또는 질환의 치료 방법을 제공한다.
Patent KR-20170137059-A (KR)
Title: 진공 절연 패널 및 제조 방법
Inventor: MACK DANIEL
IPC: B32B15/04
Filed: 2016-04-05
Abstract: 진공 절연 패널(VIP) 제조 방법은, (a) 상면, 하면 및 측면을 갖는 다공성 절연 코어를 제공하는 단계; (b) 적어도 4 미크론의 두께를 갖는 적어도 하나의 금속 포일을 제공하는 단계(금속 포일은 코어의 실질적으로 전체 상면 또는 전체 하면을 가로질러 연장되어 있어 코어의 상면과 하면 사이에 열적 브리지를 형성하지 않음); (c) 내면과 외면을 갖는 싸개를 제공하는 단계(싸개는 (ⅰ) 금속 포일이 싸개와 코어 사이에 있는 상태에서 코어와 금속 포일을 둘러싸고 또한 (ⅱ) 싸개 내부에 가해진 진공을 유지하도록 배치됨); (d) 싸개에 진공을 가하는 단계; 및 (e) 진공이 가해진 후에 싸개의 내면에 금속 포일을 부착하는 단계를 포함한다.  본 발명은 또한 이렇게 해서 형성된 VIP에 관한 것이다.
Patent KR-20180014682-A (KR)
Title: 터치 검출 회로, 지문 모듈 및 그 제어 방법
Inventor: DU CANHONG
IPC: H03K17/96
Filed: 2016-06-13
Abstract: 본 발명은 디스플레이 기술분야에 관한 것으로서, 터치 검출 회로, 지문 모듈 및 그 제어 방법을 공개하였다. 본 발명에서, 지문 모듈은 구체적으로 지문 센서, 금속 장식 부재, 터치 검출 회로 및 프로세싱 유닛을 포함하되, 사용자가 금속 장식 부재를 손가락으로 터치할 경우, 상기 터치 검출 회로는 제1 트리거 신호를 생성하고, 프로세싱 유닛은 터치 검출 회로와 지문 센서에 연결되며, 여기서, 터치 검출 회로에 의해 생성되는 제1 트리거 신호 및/또는 지문 센서에 의해 생성되는 지문 감응 신호를 수신할 경우, 프로세싱 유닛은 손가락 터치 신호를 생성한다. 본 발명은 지문 모듈의 제어 방법을 더 제공한다. 본 발명에서, 금속 장식 링과 지문 센서를 이용하여 공동으로 검출하고, 지문 모듈의 전체적인 검출 범위를 확대하여, 손가락의 검출 사각 지대를 감소시키고, 지문 모듈이 터치 검출 기능을 실현할 경우의 검출 정확도를 향상시킨다.
Patent KR-20170122276-A (KR)
Title: 티올 화합물을 함유하는 신규 광학재료용 조성물
Inventor: TAKEMURA KOUHEI
IPC: C07C321/10
Filed: 2017-03-01
Abstract: 본 발명에 따르면, 식(1)로 표시되는 폴리티올(A) 및 식(2)로 표시되는 티올 화합물(B)을 함유하는 폴리티올 조성물을 제공할 수 있다. 
   
(식(1) 중, p, q는, 각각 독립적으로 1~3의 정수를 나타낸다.) 
   
(식(2) 중, p, q는, 각각 독립적으로 1~3의 정수를 나타낸다.)
Patent KR-20170122284-A (KR)
Title: 란탄 카보네이트 하이드록사이드, 란탄 옥시카보네이트 및 이들의 제조 및 사용 방법
Inventor: DIXIT MILIND
IPC: A61K9/00
Filed: 2011-05-12
Abstract: 본 발명은 개선된 성질들을 갖는 란탄 카보네이트 하이드록사이드 또는 란탄 옥시카보네이트를 제조하는 방법이다.  이러한 방법은 수용성 란탄 및 수용성 비-알칼리 금속 카보네이트 또는 바이카보네이트의 사용을 포함한다.  얻어진 물질은 개별적으로 포스페이트 결합제로서 또는 고인산혈증을 지닌 환자들을 치료하기 위해 사용될 수 있다.
Patent KR-20170125985-A (KR)
Title: 구리-아연 합금 및 그 용도
Inventor: GAAG NORBERT
IPC: C22C9/04
Filed: 2016-03-08
Abstract: 본 발명은 59.0 내지 65.0%의 Cu, 2.5 내지 4.0%의 Mn, 1.2 내지 2.5%의 Al, 0.5 내지 2.0%의 Si, 0.2 내지 1.0%의 Fe, 0 내지 1.0%의 Pb, 0 내지 1.5%의 Ni, 0 내지 0.2%의 Sn, 나머지 Zn 및 불가피한 불순물을 포함하는 구리-아연 합금에 관한 것이다.
Patent KR-20170124612-A (KR)
Title: 가시광 통신(vlc) 신호들의 코히어런트 디코딩
Inventor: JOVICIC ALEKSANDAR
IPC: H04N5/353
Filed: 2016-04-04
Abstract: 심벌들의 시간 시퀀스를 포함하는 광 변조 신호를 방사하는 광원의 이미지들을 캡처함으로써 가시광 통신(VLC) 신호를 디코딩하여, 디코딩된 심벌들을 결정하고 그리고 후보 코드워드들의 리스트로부터 적어도 하나의 코드워드를 추가로 결정하기 위한 방법을 비롯한 방법들, 시스템들, 디바이스들, 장치, 컴퓨터/프로세서 판독 가능 매체 및 다른 구현들이 개시된다.
Patent KR-20170134577-A (KR)
Title: 방현성 코팅용 경화성 조성물
Inventor: HARAGUCHI MASAYUKI
IPC: C08J7/046
Filed: 2016-04-07
Abstract: [과제] 방현성이 우수하고, 또한 높은 내찰상성을 발현하는 하드코트층의 형성재료를 제공하는 것이다. 
[해결수단] (a)활성에너지선 경화성 다관능모노머 100질량부, (b)폴리(옥시퍼플루오로알킬렌)기를 포함하는 분자쇄의 양말단에, 폴리(옥시알킬렌)기를 개재하거나 또는 폴리(옥시알킬렌)기 및 1개의 우레탄결합을 이 순으로 개재하여 활성에너지선 중합성기를 갖는 퍼플루오로폴리에테르 0.1~10질량부, (c)1~10μm의 평균입경을 갖는 유기미립자 8~30질량부, (d)활성에너지선에 의해 라디칼을 발생하는 중합개시제 1~20질량부, 및 (e)유기용매를 포함하는 경화성 조성물, 및 이 조성물로부터 형성되는 하드코트층을 구비하는 하드코트필름.
Patent KR-20180018584-A (KR)
Title: 연장된 지지 보드
Inventor: HUSE PER KJARTAN
IPC: E04F11/02
Filed: 2016-06-15
Abstract: 워크웨이(1)와 연결된 연장된 지지 보드(6)로서, 상기 연장된 지지 보드(6)는 핸드레일(8), 무릎 레일(10) 등으로 이루어져 있고, 그리고 상기 연장된 지지 보드(6)는 조명 기구(20)의 부착을 위해 길이 방향으로 연장되는 조명-기구 레일(14)을 구비한다.
Patent KR-20190082605-A (KR)
Title: Semiconductor package
Inventor: KIM JOON SUNG
IPC: H01L23/538
Filed: 2018-01-02
Abstract: An embodiment according to the present disclosure provides a semiconductor package. The semiconductor package includes: a support member having first and second surfaces disposed on opposite sides to each other, cavities penetrating through the first and second surfaces, and at least a primer layer disposed on the second surface; a connection member disposed on the second surface of the support member and having a rewiring layer; a semiconductor chip having an active surface on which a connection pad is disposed and an inactive surface on the opposite side to the active surface, wherein the connection pad is electrically connected to the rewiring layer; and an encapsulant covering the first surface of the support member and the inactive surface of the semiconductor chip. It is possible to prevent defects due to a reinforcement material.
Patent KR-20190087204-A (KR)
Title: Fret sensor for detecting l-leucine and detecting method of l-leucine using the same
Inventor: LEE HYUNSOO
IPC: G01N33/58
Filed: 2018-01-16
Abstract: The present invention relates to a FRET sensor for detecting L-leucine, an L-leucine detection method using the FRET sensor for detecting L-leucine, and a composition for detecting L-leucine comprising the FRET sensor for detecting L-leucine. The present invention provides the FRET sensor for detecting L-leucine, comprising an L-leucine-binding protein into which a fluorescent donor is introduced; and a fluorescent receptor protein.
Patent KR-20190087759-A (KR)
Title: Copyright and DRM Royalty Fee Settlement Method for Contents Media Service and Recording Medium for Performing the Method
Inventor: YOUNG MO KIM
IPC: G06Q50/18
Filed: 2018-01-17
Abstract: The present invention relates to a method for integrally settling a copyright fee for content media service and a digital rights management (DRM) copyright fee, which can integrally distribute a copyright fee for content media service and a DRM copyright fee and a recording medium for performing the method. The present invention comprises: a step of registering DRM technology from a DRM service provider in a DRM market module; a step of selling the registered DRM to a content provider through the DRM market module; a step of uploading DRM-applied content from the content provider in a cloud media service module; a step of selling content to a content purchaser through the cloud media service module; and a step of paying the content provider excluding the commission among the sales revenue obtained from the content purchaser in the cloud media services module.
Patent KR-20180091715-A (KR)
Title: Pharmaceutical composition for preventing or treating of bone disease containing activity inhibitor of peroxiredoxin 1
Inventor: YIM MI JUNG
IPC: G01N33/68
Filed: 2018-01-26
Abstract: The present invention relates to a pharmaceutical composition for preventing or treating a bone disease containing an activity inhibitor of peroxiredoxin 1. Specifically, the peroxiredoxin 1 protein of the present invention induces differentiation of progenitor osteoclasts, increases osteoclasts induced by lipopolysaccharide-induced antibody to peroxiredoxin-1 protein and inhibits bone loss in a bone loss animal model. Therefore, the activity inhibitor of the peroxiredoxin 1 protein can be usefully used for a preventive or therapeutic agent for bone diseases.
Patent KR-20190098776-A (KR)
Inventor: JEONG SEONG WEON
IPC: B29C64/393
Filed: 2018-01-29
Abstract: The present invention relates to a three-dimensional printing device, which prevents a physical property error and a deformation error, and comprises: an acquiring unit for acquiring a first code when a first code for controlling a three-dimensional printer is provided to print a first object; a grasping unit for grasping the physical property error in which the property of the first object due to heat accumulation in an actual printing process of the first object is non-uniform by using the first code before the actual printing process of the first object; and a correcting unit for correcting the first code causing the physical property error.
Patent KR-20190093366-A (KR)
Title: Memory system and operating method thereof
Inventor: CHUN DONG YEOB
IPC: G06F1/32
Filed: 2018-02-01
Abstract: A memory system adjusting operation frequencies of resources to consume the amount of power within a power budget comprises: a plurality of resources; and a frequency adjusting unit configured to adjust operation frequencies of the resources in one or more adjustment timings. The adjustment timings include one or more timings for distinguishing partial operation sections of one or more resources.
Patent KR-20190096170-A (KR)
Title: Heat exchanger for refrigerator
Inventor: CHOI JIWON
IPC: F28F9/02
Filed: 2018-02-08
Abstract: According to the present invention, a heat exchanger of a refrigerator comprises: a first heat exchange unit in which a flow path through which a refrigerant flows is formed, and which includes a plurality of vertically stacked flat tubes and a fin connecting the flat tubes to each other; and a second heat exchange unit in which the flow path through which the refrigerant flows is formed, which includes a plurality of vertically stacked flat tubes and a fin connecting the flat tubes to each other, and which is arranged behind the first heat exchange unit. Fin density of the second heat exchange unit is lower than fin density of the first heat exchange unit, and the first heat exchange unit overlaps with the second heat exchange unit. The flat tubes of the first heat exchange unit are disposed in parallel with left and right directions, and the flat tubes of the second heat exchange unit further include a bending portion bent at a predetermined curvature.
Patent KR-20190100537-A (KR)
Inventor: PARK SANG HYUN
IPC: G06F16/00
Filed: 2018-02-09
Abstract: The present invention discloses a key value-based data access device, in particular, a data access device in which data input / output performance is improved by fully utilizing the parallelism of a flash memory-based storage device. The key value-based data access device of the present invention comprises: a server for receiving a key list including at least one key value based on a user′s input, and outputting data accessed according to the key list; a storage unit including a storage area divided into a plurality of nonvolatile memory cells for storing the data; and a control unit for requesting and receiving location information of the data stored in the memory cells in parallel, generating a stored data list from the received location information, and accessing the data stored in the memory cells by comparing the generated stored data list with the key list.
Patent KR-20190097391-A (KR)
Title: Apparatus and method for generating audio signal in which noise is attenuated based on phase change in accordance with a frequency change of audio signal
Inventor: BAEK SOON HO
IPC: G10L25/30
Filed: 2018-02-12
Abstract: Disclosed is an electronic apparatus. In addition, various embodiments identified through a specification of the present invention are possible. The electronic apparatus comprises: a plurality of input devices receiving a plurality of input signals including a voice signal and a noise signal; and a processor electrically connected to the input devices. The processor may be set to determine a signal to ratio (SNR) value for the input signals by a frequency band, determine a first parameter indicating phase shift for a frequency of the input signals in a first frequency band having the SNR value equal to or greater than a designated threshold value, determine a second parameter indicating phase shift for a frequency of the input signals in a second frequency band having the SNR value less than the threshold value based on the first parameter, and perform beam forming for the input signals based on the first and second parameters.
Patent KR-20190098476-A (KR)
Inventor: BANG YEUN HO
IPC: F21V29/87
Filed: 2018-02-14
Abstract: Provided is a lighting apparatus for vehicle. According to an exemplary embodiment of the present invention, the lighting apparatus for vehicle comprises: a light source unit including at least one LED mounted on one surface of a circuit board; a metal plate dissipating heat generated from the light source unit and dissipating the heat to the outside; and a supporter supporting the metal plate to maintain a shape of the metal plate. One surface of the circuit board is directly attached to one surface of the metal plate through an adhesive layer as a medium.
Patent KR-20180098141-A (KR)
Inventor: SUZUKI MASUMI
IPC: B60R13/08
Filed: 2018-02-14
Abstract: An objective of the present invention is to reduce or interrupt delivery of sounds and vibration and improve sound shielding efficiency by an air layer in a space formed inside a hole plug that closes an opening of a panel, such as a vehicle body. The hole plug (200) includes an annular first flange part (220) that is in contact with the circumferential periphery (for example, an upper circumferential periphery) of one side of an opening (211) formed in a panel (210), a first cover part (230) that closes the opening (211) together with the first flange part (220), and a closing part (240) that includes a specific space (250) between the first flange part (220) and the first cover part (230) to close the opening (211) as the first cover part (230) is caught by the circumferential periphery (for example, a lower circumferential periphery) of an opposite side of the opening (211).
Patent KR-20190099703-A (KR)
Inventor: BANGS SEUNG HYUN
IPC: B05B1/30
Filed: 2018-02-19
Abstract: The present invention relates to a shower head consisting of a second head cover; a head body inserted into the second head cover; a first head cover coupling the head body with the second head cover; a coupling unit coupled to the rear surface of the second head cover; and a water supply control unit coupled to the coupling unit. According to the present invention, the shower head can be adjusted in a desired direction.
Patent KR-20190102940-A (KR)
Title: Expension device of panels
Inventor: ISHIDA JOZO
IPC: E04B1/41
Filed: 2018-03-05
Abstract: The present invention includes: a first composition member (2) formed so that at least portions of a plurality of panels (4, 5, 6) can be overlapped; and a second composition member (3) formed so that at least portions of a plurality of panels (7, 8, 9) can be overlapped. The first composition member (2) and the second composition member (3) are connected to an expandable and contractible link member (15). The first composition member (2) and the second composition member (3) are expanded and contracted by expansion and contraction of the link member (15). The first composition member (2) and the second composition member (3) can be relatively rotated around rotating axes (11, 12).
Patent KR-20190110729-A (KR)
Title: Directional guide plate that can be opened and closed and removable
Inventor: LEE BOM YI
IPC: G09F13/04
Filed: 2018-03-21
Abstract: The present invention relates to a directional guide plate for providing various information. The directional guide plate comprises: advertising panels (10) being in a transparent state and capable of being exposed to the outside; body portions (20a, 20b) connected between the advertising panels (10) to protect side surfaces; opening and closing doors (30) fixedly seated on the inner surfaces of the advertising panels (10) and on the receiving portions (23) formed between the body portions (20a, 20b), respectively, to be opened and closed; and rotating means (40) mounted on the body portions (20a, 20b) and the advertising panels (10) to open and close the opening and closing doors (30) from the body portions (20a, 20b). Accordingly, the present invention can prevent separation of reinforcing bars opened and closed through the rotating means, thereby increasing a fixing force and being capable of opening and closing within a wide angle, a structure of being coupled through hook portions enables opening and closing and attachment and detachment, thereby facilitating maintenance and convenience, is designed to be able to contract the advertising panels while strongly connecting the advertising panels, and can have O-ring (rubber, silicone, etc.) insertion grooves to seal opening and closing portions and the space, thereby preventing dust and water leaks.
Patent KR-20190112582-A (KR)
Inventor: HAN JIN SU
IPC: H01M2/10
Filed: 2018-03-26
Abstract: Disclosed is a uniform surface pressure battery cell cartridge. According to an embodiment of the present invention, the uniform surface pressure battery cell cartridge, as a cartridge in which a plurality of battery cells are stacked to form a battery module, is a frame structure for mounting the battery cell inside and has a mounting unit of a shape of corresponding to an outer circumferential surface of an electrode assembly storage unit of the battery cell and a pad covering the mounting unit provided therein. A frame has a male and female coupling structure for uniform surface pressure.
Patent KR-20190115185-A (KR)
Title: An apparatus and method for removing bioelectrochemical nitrogen using a single chamber microbial fuel cell
Inventor: YU JAE CHEUL
IPC: H01M8/22
Filed: 2018-04-02
Abstract: The present invention relates to an apparatus and method for bioelectrochemical removal of nitrogen using a single chamber-type microbial fuel cell. More specifically, the apparatus for bioelectrochemical removal of nitrogen using a single chamber-type microbial fuel cell includes a single reaction tank in which the single chamber-type microbial fuel cell is installed, wherein the ratio (A/V ratio) of area of the single chamber-type microbial fuel cell to volume of the single reaction tank is 200 to 300 (m^2/m^3). Unlike a conventional microbial fuel cell, the apparatus and method of the present invention have effects of not requiring aeration for nitrification, and being capable of securing efficiency of stably removing nitrogen in wastewater without a need to supply an additional carbon source for denitrification. Further, according to the present invention, the apparatus and method have an excellent effect of enabling reproducibility to be secured when being applied to an actual wastewater treatment plant since the apparatus and method have high treatment efficiency and design conditions of the apparatus are clear.
Patent KR-20190116769-A (KR)
Title: A support bar for a glass loading cassette, a fixture for supporting the support bar, and a glass loading cassette
Inventor: LEE JONG CHUL
IPC: G02F1/13
Filed: 2018-04-05
Abstract: The present invention is possible to improve space utilization when stacking glass on a support bar installed on a cassette and achieves weigh lightening of a fixture and a glass loading cassette. According to the present invention, a support bar for a glass loading cassette forms an upper portion surface of a support bar to be linear, forms a lower portion surface to be a linear part which is a 1/5 point from a back end portion of the support bar to a front end portion thereof, and forms the others to be in a shape of being thinner toward the front end portion. A fixture is possible to contribute to weight lightening and is formed such that water is not introduced into the support bar during cleaning and drying processes. The present invention includes a cassette formed by assembling the support bar to which the fixture is coupled in quantity.
Patent KR-20190049381-A (KR)
Inventor: LEE BYEONG KYU
IPC: C08K3/22
Filed: 2018-04-11
Abstract: The present invention relates to oil-water separating materials and a method for producing the same. The oil-water separating materials include a composite in which a zinc oxide particle layer where two or more zinc oxide particles aggregate randomly in a radial manner to form a micro-nanostructure on the basis of an arbitrary point on the surface of a melamine resin matrix having a porous, foamed structure; and a silane coating layer are sequentially formed. Thus, the oil-water separating materials are not only excellent in durability, but also have an advantage that the average BET specific surface area is large and oil-water separation efficiency is excellent by being lipophilic, superhydrophobic, and super-water repellent. Therefore, the materials can be effectively used as oil-absorption-type, oil-water separating materials used for large-scale oil-water separation such as oil removal from the ocean.
Patent KR-20180095474-A (KR)
Title: Infrared cut off film, film type infrared cut off filter using the same and the manufacturing method theeby
Inventor: LEE TAE GEUN
IPC: C08L101/00
Filed: 2018-04-17
Abstract: The present invention relates to an infrared cut off film and a manufacturing method thereof. The infrared cut off film includes a transparent substrate; a first light absorbing layer formed on one surface of the transparent substrate; a first adhesion layer formed between the transparent substrate and the first light absorbing layer; a second light absorbing layer formed on the other surface of the transparent substrate; a second adhesion layer formed between the first light absorbing layer and the second light absorbing layer; a third light absorbing layer formed on the first light absorbing layer and having heat resistance higher than that of the second light absorbing layer; and a third adhesion layer formed between the first light absorbing layer and the third light absorbing layer. It is possible to prevent image distortion.
Patent KR-20190125648-A (KR)
Inventor: YANG TAE KYU
IPC: G06Q50/20
Filed: 2018-04-30
Abstract: An embodiment of the present invention may include: a generator terminal which, as a terminal used by a generator who generates an online language exchange room, transmits a generation request for a language exchange room where conversation takes place with a set language to a language exchange room mediating server, and displays the language exchange room that is a conversation screen with a buyer who joined the generated language exchange room; a buyer terminal which, as a terminal used by a buyer who wants to join a language exchange room to learn language, transmits a language type selected by the buyer to the language exchange room server, receives a language exchange room list matching with the selected language from the language exchange room mediating server to display, displays a screen showing the buyer joined the language exchange room selected by the buyer from the language exchange room list to allow the generator and the buyer to have chat conversation, and proceeds payment of usage fee according to language exchange room retention time after ending the chat conversation from the language exchange room; and the language exchange room mediating server which generates a language exchange room requested from the generator terminal to allow the generator to join the room, generates and transmits a language exchange room list including language type of the generated language exchange room and generator information to the buyer terminal, receives language from the buyer terminal to display an exchange room list matching with the selected language, allows the buyer to join the language exchange room selected by the buyer from the exchange room list, and proceeds payment of usage fee from the buyer according to language exchange room retention time of the buyer. According to the present invention, a buyer may have different conversations including discussion type, learning type or more with a language selected by the buyer such that language learning effect can be maximized.