baber/WOPTO huggingface dataset:
Patent KR-20000077056-A (KR)
Title: 엑시머 레이저장치
IPC: H01S3/036
Filed: 2000-04-20
Abstract: 본 발명의 목적은 케이싱내에 채워진 레이저 가스의 압력이 변하는 경우에도 팬의 회전속도를 일정하게 유지시키고, 주(主) 방전전극 사이의 레이저 가스흐름을 균일하게 할 수 있는 엑시머 레이저장치를 제공하는 것이다. 
     엑시머 레이저장치는 레이저 가스로 채워진 케이싱; 상기 케이싱내에 배치되어 전기적 방전을 발생시켜 고속의 반복률로 상기 레이저 가스를 방전펌프시키는 한 쌍의 주 방전전극; 상기 주 방전전극 사이에 고속의 레이저 가스흐름을 발생시키는 팬; 베어링; 상기 팬을 작동시키는 모터; 상기 팬의 회전속도를 검출하는 회전속도 검출장치; 및 상기 회전속도 검출장치에 의해 검출된 상기 팬의 회전속도에 기초하여 상기 모터에 공급되는 전압과 주파수중 하나 이상을 제어하여, 상기 팬의 회전속도를 일정수준으로 제어하는 제어장치를 포함하여 이루어지며, 상기 팬은 상기 베어링에 의해 회전 가능하게 지지되는 회전 가능한 샤프트를 구비한다.
Patent KR-20010104452-A (KR)
Inventor: YOON CHANG JUN
Filed: 2000-04-28
Abstract: 본 발명은 소자의 크기를 줄이기 위한 반도체 소자의 제조 방법으로서, 활성영역 및 필드영역이 정의된 반도체 기판의 활성영역에 소정깊이를 갖는 트랜치를 형성하는 단계; 상기 트랜치 양측의 반도체 기판 표면내에 트랜치보다 깊게 절연막을 형성하는 단계; 상기 트랜치를 포함한 전면에 게이트 산화막, 전도막을 차례로 형성하는 단계; 상기 전도막 및 게이트산화막을 선택적으로 제거하여 상기 트랜치 및 반도체 기판상에 게이트 라인을 형성하는 단계를 포함하여 형성함을 특징으로 한다.
Patent KR-20010105752-A (KR)
Title: Apparatus for fixing portable goods
Inventor: HAHM YUNG HYUK
IPC: A41D27/00
Filed: 2000-05-17
Abstract: The invention concerns pharmaceutical compositions for oral administration containing 0.5 % to 20 % of N-piperidino-5- (4- chlorophenyl)-1-(2,4-dichlorophenyl)-4-methylpyrazole-3-carboxamide in microcrystalline form and pharmaceutical vehicles. The compositions are formulated by wet granulation.
Patent KR-20000054213-A (KR)
Inventor: LEE DAE SEONG
Filed: 2000-05-26
Abstract: PURPOSE: A method for operating internet fashion malls with image process is provided to supply buyers with virtual images of buyers wearing buying goods, and buy goods by supplying decorating information to buyers. CONSTITUTION: A method for operating internet fashion malls with image process comprises the steps of: connecting a server of fashion shopping malls with databases for information on members, fashion goods and decoration; inputting identifications and passwords in the shopping malls; searching registered goods; selecting specific goods in the searched goods; being supplied buyers with virtual images mixed picture images of buyers and goods images from databases for information on members and fashion goods; and buying the specific goods.
Patent KR-20010049488-A (KR)
Inventor: TERAMOTO KAZUHIRO
IPC: G01R31/28
Filed: 2000-06-05
Abstract: PURPOSE: To obtain a semiconductor device capable of changing the internal power potential in a semiconductor device with an internal power circuit and performing an effective accelerated tests. CONSTITUTION: An A-group of a plurality of P-channel transistors 1 and a B-group of a plurality of P-channel transistors 2 are connected between a power potential VCC and a ground, and an output signal SUBUP is obtained from a node C via two inverters 3. The connection ends of the B group of transistors 2 are each connected to a ground via N-channel transistors 4-6. First signals Φ1 and Φ2 are inputted to the gates of the transistors 4 and 5, and their output of an NOR logic circuit 7 is inputted to the gate of the transistor 6. By this constitution, as it is possible to regulate the current ability of the B group of P-channel transistors 2 to control a substrate potential and to change the substrate potential in a higher direction or in a lower direction than at the time of normal operation through the use of test mode, it is possible to accelerate tests by changing the substrate potential at the time of hold tests in a selecting process and to shorten the time for selection.
Patent KR-20010111332-A (KR)
Title: 아스콘 품질 개선을 위한 편석 분쇄기 및 -6㎜ 석분야적시 분진 불리 적재 방지
Inventor: KOO I HOE
Filed: 2000-06-09
Abstract: 본 발명은 건설현장에서 아스팔트(Asphalt) 도로 포장을 하기 위하여 아스콘(Ascon)을 생산하기 위한 표층의 경우 19mm 조골재 내에는 편석 풍암류(푸석돌) 흙덩이, 장석 및 장편석 그리고 규격외로 불규칙 1%∼5% 튀어나와 다음의 큰규격으로 통과하여 조골재 미달로 인한 배합비 설계의 조골재 미달 현상을 초대하는 등의 비정상의 골재를 깨끗이 하기 위하여 중량이 무거운 롤라(Roller)가 잘못 생산된 자갈 위에서 회전하면서 제거하여 물로 씻어내어 조골재의 품질을 향상시키며, 둘째는 -6 mm가 석산에서 생산되여 콘베어(Conveyor)에서 떨어져 저장할 때 6mm∼4mm 굵은 입자는 컨베이어 압쪽(C) 지점 위치에 저장되고 중간입자는 중앙부분(B) 지점에 저장되며 분진류는 컨베이어 내부쪽(A) 지점에 밀집되여 석분은 항상 위에서 지적한 상태로 분리되어 저장되므로 페이로다(Pay Loader)가 -6mm 석분을 공급할 때에는 수시로 입자의 변화를 발생하여 때로는 분진류만 공급할 때가 발생하면 아스콘의 품질은 사용불가한 상태로 변하는 결과를 발생하지 않도록 하기 위하여 컨베이어 낙하지점에 슛드(Shut)를 설치하여 낙하는 석분을 받아 분산하면서 약간의 물을 분사하여 석분이 분리하여 저장하는 것을 없도록 하여 언제나 석분 입자가 고르게 저장하여 아스콘의 품질을 항상 균일한 상태로 향상하기 위한 것이다
Patent KR-20010111777-A (KR)
Inventor: YOON YE SEOK
Filed: 2000-06-13
Abstract: 본 발명은 인터넷을 통한 의류 전자 상거래 방법에 있어서, 사용자가 상기 의류 전자 상거래 서비스를 제공하는 메인 서버에 접속 및 로그인하고 메인 서버에서 사용자를 승인하는 단계; 사용자가 원하는 의류 품목, 디자인 및 색상을 포함하는 의류 데이터를 선택하도록 하는 단계; 상기 사용자가 선택한 의류 데이터를 데이터베이스에 저장하는 단계; 사용자의 신체 사이즈에 대한 데이터를 취득하기 위하여, 사용자측의 컴퓨터에 연결된 디지털 카메라를 사용하여 사용자의 신체를 촬영하도록 하여 메인 서버로 화상 데이터를 전송하는 단계; 상기 화상 데이터에 의거하여 사용자의 신체 사이즈 데이터를 취득하는 단계; 상기 사용자의 화상 데이터를 데이터베이스에 저장하는 단계; 상기 신체 사이즈 데이터에 의거하여 제작할 의류에 대한 패턴을 생성하는 단계; 상기 생성된 패턴에 따라 제작될 의류를 가상으로 완성시켜 상기 사용자의 화상 데이터에 착용시킨 상태를 사용자에게 전송 및 디스플레이하여 승인하도록 하는 단계; 및 사용자의 승인이 이루어지면, 상기 생성된 패턴에 의거하여 의류를 제작할 것을 지시하는 단계를 구비하는 것을 특징으로 하는 인터넷을 통한 의류 전자 상거래 방법에 관한 것이다.
Patent KR-20010007362-A (KR)
Inventor: HATASAKA HIDEYUKI
IPC: C04B26/02
Filed: 2000-06-14
Abstract: PURPOSE: A fire-insistent sound and electromagnetic radiation absorbing ceiling board is provided to improve the characteristics of a fire-insistent and electromagnetic radiation barrier by bonding a metallic foil to a ceiling board. CONSTITUTION: A fire-insistent sound and electromagnetic radiation absorbing ceiling board has a thickness of 1 mm to 30 mm. The fire-insistent sound and electromagnetic radiation absorbing ceiling board comprises a layer which is composed of a rock wool of 67-92 % by weight, a beaten pulp of 0.5-8 % by weight, a cohesive material of 2-13 % by weight, which is produced from a resin, an agglutination material of 0.15-1 % by weight, which is composed of an organic macromolecule resin and an inorganic salt, and a carbon fiber of 0.5-10 % by weight. The carbon fiber gives the characteristic of an electromagnetic radiation absorbing to the fire-insistent sound and electromagnetic radiation absorbing ceiling board.
Patent KR-20010113080-A (KR)
Inventor: SONG KIL BONG
IPC: F16K5/06
Filed: 2000-06-16
Abstract: 본 발명은 파이프를 통과하는 유체의 흐름을 개방 또는 차단시키는 밸브에 관한 것으로서, 특히, 밸브의 개폐동작을 외부의 신호에 의해 자동으로 개방/차단하면서, 이 상태를 자동으로 감지되도록 하는 자동 밸브에 관한 것이다. 
     본 발명은 소정 직경의 파이프에 밀폐수단으로 접속되는 밸브케이스가; 그 내부에 통공이 형성되어 상기 밸브케이스에 직립되게 설치되는 제1격벽 및 제2격벽과, 상기 제1격벽 및 제2격벽 사이에 장착되어 전원의 극성에 따라 열림자석과 닫힘자석의 자극을 바꾸는 제어부와, 상기 제어부의 열림자석과 닫힘자석에 의하여 상기 제1격벽과 제2격벽의 통공들을 각각 막아주는 변들을 상호 교체되게 여닫는 기구부와, 상기 제1격벽과 제2격벽사이에 장착되어 상기 각 변들의 개폐에 의하여 밸브통공이 형성된 회전체가 스윙되어 상기 제1격벽과 제2격벽간의 주통공이 연통 또는 차단되도록 하는 주밸브로 이루어지도록 구성하였다. 
     따라서, 본 발명은 밸브의 개폐를 쉽게 제어할 수 있고, 밸브의 동작 상태를 손쉽게 전기적으로 전환할 수 있고, 설비가 간단하고 가스 및 액체의 이송에 모두 적용 가능하며, 폭발성 가스 배관에 사용하여도 발화등을 원천적으로 차단하는 편리하며 경제적인 이점이 있다.
Patent KR-20010049572-A (KR)
Inventor: EDWARD CHARLES KOSTANSEQ
IPC: A01N25/04
Filed: 2000-06-19
Abstract: PURPOSE: A process for producing pesticide dispersions is provided, thereby the process can be effectively applied to the water-insoluble pesticide. CONSTITUTION: The process for producing pesticide dispersions comprises the steps of: mixing the dissolved solid-containing stream and solvent-containing stream; and mixing the mixed streams in a chamber under high shear condition, after forming particles having below 5 micrometer of particle size by emulsifying dissolved solid, cooling them below their melting point to solidify them before leaving the particles from the reactor, in which the melting point of the solid is 40 to 120 deg.C; the temperature of the dissolved solid-containing stream is above 5 deg.C; the solid has 1 wt.% or less of solubility to solvent at 25 deg.C; and one or both streams have surfactant or dispersing agent or all of them.
Patent KR-20010113375-A (KR)
Inventor: KANG JAE MUN
IPC: F25D11/00
Filed: 2000-06-19
Abstract: 본 발명은 냉장고의 보관식품표시장치에 관한 것으로, 더욱 상세하게는 터치스크린을 이용하여 냉장고의 보관식품을 간편하게 표시할 수 있는 냉장고의 보관식품표시장치 및 그 제어방법에 관한 것이다.  본 발명에 따른 냉장고의 보관식품 표시방법은, 냉장고에 보관되는 식품에 대한 정보를 터치 스크린을 이용하여 간단하게 기록하는 것이 가능하게 된다.  따라서 사용자는 보관식품의 기록에 따른 기능의 활용을 위해 소비하는 시간을 최소화할 수 있으며, 특히 보관식품 기록 및 표시를 위한 기능의 활용도를 높일 수 있는 효과를 가져온다.
Patent KR-20000058625-A (KR)
Inventor: JUNG HYEONG DONG
IPC: B21D51/38
Filed: 2000-06-20
Abstract: PURPOSE: A method of producing taps for drink cans is provided to decrease cost of production by printing with an iron plate to prevent a tap from corroding and to supply various colors of taps according to taste of consumers. CONSTITUTION: A work line consists of a spiral coil feed unit(10), a washing/drying unit(20) for an iron plate, a printing unit(30) for coating paint on the surface of the iron plate, a first drying unit(40) and a coiling unit(50) for making a cylindrical coating coil(C2). A printing process is performed in the work line. A second work line is composed of a coating coil feed unit, a press unit for molding a tap, a coating unit for re-coating the coating coil(C2), a second drying unit and a hopper unit for collecting the tap. A tap molding process is performed in the second work line independent of the printing process.
Patent KR-20020001005-A (KR)
Title: a mouse for computer
Inventor: HAM YEONG U
IPC: G06F3/0354
Filed: 2000-06-23
Abstract: PURPOSE: A mouse for a computer is provided to maintain the security of a document being written and increase the convenience of usage of the mouse by making the mouse to be separated into its body and a cable by means of a connector and have functions of a calculator and an alarm clock. CONSTITUTION: A ball(11) is mounted inside of a case(10) of a mouse(1). A part of the ball(11) is projected on a lower part of the case(10). When the ball(11) rotates, a sensor provided within the case(10) detects the rotation of the ball(11) so as to move a cursor on a monitor. A connector(20) has a cable(30) easily separated from and coupled to the mouse(1) by means of an electric outlet(21) formed on the front of the case(10) and a plug(22) formed on the cable(30). A plurality of terminal holes(21a) are formed on the electric outlet(21) of the case(10). A plurality of terminal pins(22a) are formed on the plug(22) of the cable(30). An upper part of the case(10) is comprised of a liquid crystal display(40) and a panel(41) for operating buttons provided thereon. A cover(50) for protecting the panel(41) is coupled to the upper part of the case(10) by a hinge(50a).
Patent KR-20020004055-A (KR)
Title: Method For Manufacturing Polyaniline Including Partially Bonded Disulfide Function And Cathode Including The Same
Inventor: CHO JI HUN
IPC: C08G73/02
Filed: 2000-06-30
Abstract: PURPOSE: Provided are a process for producing polyaniline to which disulfides are bonded partially for improving the mix of molecular units among conductive polymers and an anode containing the polyaniline for producing an energy storage apparatus excellent in cycle performance. CONSTITUTION: The process for producing the polyaniline to which disulfides are bonded partially comprises the steps of: dissolving dithioaniline or amino thiophenol and aniline in the weight ratio of 1:10-5:1 in at least one solvent selected from the group consisting of water, acetonitrile, and acetone; adding an acid and an oxidizing agent to the solution at a temperature of -10 to 60deg.C, wherein the acid is at least one selected from the group consisting of HCl, H2SO4, and HClO4 and the oxidizing agent is at least one selected from the group consisting of ammonium sulfate, potassium sulfate, and hydrogen peroxide; filtering, cleansing, and separating the resultant. And the anode contains the polyaniline to which disulfides are bonded partially, a sulfur compound, and carbon.
Patent KR-20000059103-A (KR)
Inventor: YUH SAHNG IHL
IPC: G06F17/00
Filed: 2000-07-14
Abstract: PURPOSE: A system and a method for automatically solving the time difference of a real-time internet live coverage are provided so that a user can receive a real-time internet live coverage service in desired time by storing encoded data in a database server temporarily after inserting index codes comprising local standard time to real-time internet live coverage data. CONSTITUTION: A database server(200) extracts user service request site information requested from a user s service request screen display window(202). The database server(200) is connected with the extracted site through a connection port(220) which can connect using the TCP/IP protocol through the internet network(204) and receives data transmitted the connected broadcasting site(206). The database server(200) encodes index codes, comprising local standard time, to the received data(208) and stores the data of an encoded site in a data storage(210).
Patent KR-20010015439-A (KR)
Title: High-frequency transceiver circuit for a cellular phone
Inventor: OFUNE ICHIJI
IPC: H04B1/38
Filed: 2000-07-26
Abstract: PURPOSE: To provide a high frequency transmission reception circuit for a small- sized lightweight mobile phone by decreasing the number of components and large-sized components to the utmost. CONSTITUTION: This high-frequency transmission reception circuit is provided with a two-port band-shift type antenna multicoupler 1, that shifts a high frequency signal between a 1st frequency band and a 2nd frequency band and also shifts a high frequency signal between a 3rd frequency band and a 4th frequency band, a 1st circulator 2 connected to one port P1 of the antenna multicoupler 1, a 2nd circulator 3 connected to the other port P2 of the antenna multicoupler 1, 1st transmission signal systems 4, 8, 12 that are connected to the 1st circulator and transmit a high frequency signal with the 1st frequency band, 1st reception signal systems 5, 9, 13 that receives the high-frequency signal with the 2nd frequency band, 2nd reception signal systems 6, 10, 14 that are connected to the 2nd circulator 3 and receive the high-frequency signal with the 3rd frequency band and 2nd transmission signal systems 7, 11, 15 that transmit the high frequency signal with the 4th frequency band.
Patent KR-20020010371-A (KR)
Title: Reference voltage variable circuit for optical interface apparatus
Inventor: KIM TAE HYEONG
IPC: G05F1/565
Filed: 2000-07-29
Abstract: PURPOSE: A reference voltage variable circuit of an optical interface device is provided to remove noise generated from a final output terminal, and to remove noise generated from an output terminal using a comparator with hysteresis characteristic. CONSTITUTION: An optical diode converts light from a LED into current. A reference current generator(11) generates a reference current. A comparator(12) compares a voltage according to the reference current generated from the reference current generator(11) with an input voltage, and outputs the comparison voltage. A reference voltage generator(13) varies the level of the reference voltage using the comparison voltage and a feedback output voltage from a final output terminal(OUT) to output it to a non-reversed terminal(+) of the comparator.
Patent KR-20000063697-A (KR)
Inventor: SEO JAE BOK
IPC: G06Q50/10
Filed: 2000-07-31
Abstract: PURPOSE: A cyber workman contest is provided to creat a workman of marked indivisuality in the 21th century on the internet. CONSTITUTION: A cyber workman contest constructs a cyber workman hall, collects cyber workman workman images by allowing the users to register the images based on the users' experience, opens the collected cyber workman images, allows the users to take a vote for selecting best image, selects the best cyber workman image, publicizies the selected image, and produces a moving picture or a workman on the selected cyber workman image.
Patent KR-20000063934-A (KR)
Inventor: KIM CHI HUN
IPC: G06Q50/10
Filed: 2000-08-11
Abstract: PURPOSE: A method for real time evaluation of an athlete is provided to evaluate an athlete's contribution level that corresponds the real time determinations of people, who are in the actual spot or are related to the spot, in addition to the objective evaluation based on the athlete's statistics of performance. CONSTITUTION: A main server requests for input of connector's ID information(300) and determines validity of the ID information(310). If yes, the data of sports categories stored in a first or a second device is provided(320). If no, the initial page is displayed for membership registration(325). The main server provides detailed information of the sports category selected by the connector(330). The main server conducts live broadcast of the selected athlete's sports game by receiving from the location relay broadcast device in the actual spot and transmitting it through the broadcast relay and the internet(340). The server confirms whether the connector is willing to participate the evaluation of the athlete (350). If yes, the main server provides the athlete's current points and evaluation status(360), but if no, it checks whether the connector wishes to participate in other sports categories(365) and returns the connector to the step 320 or provides a different service(370). The server receives stock trade information of each athlete(380), records the received information in the DB(390), and confirms the user's purchase and sales status(400). If a transaction has been made, the transaction information is recorded(410) but if not, the user is returned to the step 380. The stock trade is conducted until the game is completed and the main server confirms the game completion(420) and if the game has completed, the stock trade is concluded(430) and the user decides whether to evaluate other athletes(440). If the user does not wish to participate in other evaluations, the user's intent to receive other services is determined(450). If yes, other services are provided(460) and then the entire process is concluded. If no, the process is immediately concluded.
Patent KR-20010030083-A (KR)
Title: Rotary Electrodynamic Machine
Inventor: HATSUTORI KENICHI
IPC: H02K15/04
Filed: 2000-08-12
Abstract: PURPOSE: To get a turbine-required rotating machine of gas cooling type which has high cooling performance and is low-cost and high in reliability. CONSTITUTION: In a turbine generator comprising a rotor 1 the winding slot and the sub slot of a rotor 1, rotor winding where conductors and insulating material are stacked alternately, a wedge, and a radial ventilation passage connecting the subslot with a front wedge, a projection 22 is provided at the inner face of the above radial ventilation passage, and besides the height of the projection 22 is varied in the position in the axial direction of the rotary shaft. According to this, a gas cooling type of rotating machine for a turbine which is low-cost and highly reliable and small-sized can be obtained.
Patent KR-20020013252-A (KR)
Title: Changing visual advertisement of tunnel wall
Inventor: HAM CHUN SIK
IPC: G09F19/18
Filed: 2000-08-14
Abstract: PURPOSE: Provided is image movable advertisement on the wall of a tunnel which displays advertisement contents as image on the wall of the tunnel in passing the tunnel so that it helps to relives passengers of tedium in the tunnel. CONSTITUTION: The image movable advertisement on the wall of the tunnel comprises the parts of: a projector(10) which is placed at each partition from front edge to rear edge in a subway(40) with including a CD or a film for advertisement contents; and a sensor(20) which detects the moment when the front edge of the subway enters a tunnel(30a), changes the signal into a movable signal to permit into the projector and runs the projector for showing the produced advertisement image recorded at CD or film.
Patent KR-20020019177-A (KR)
Title: Water blocking resin composition and a process for preparing a water blocking swellable yarn using the composition
Inventor: LEE JAE CHUL
IPC: C08L31/04
Filed: 2000-09-05
Abstract: PURPOSE: A swelling resin composition and a method for preparing a swelling yarn by using the composition are provided, wherein the swelling yarn is installed between the optical fibers or copper lines of an optical fiber cable or a copper cable to absorb water or moisture. CONSTITUTION: The swelling resin composition is obtained by adding a resin selected from the group consisting of a water-soluble heat reversible resin and an acetic acid vinyl resin, to a volatile solvent to prepare a binder; and adding a super absorbent resin to the binder to dissolve it. Preferably the volatile solvent is methanol, the water-soluble heat reversible resin is poly(ethylene oxide), and the super absorbent resin is a copolymer of poly(acrylic acid) and poly(acryl amide). The preparation method of a swelling yarn comprises the steps of dipping a yarn into the resin composition; passing the mixture through a nozzle to allow the resin composition to be adhered to the yarn; and drying the yarn.
Patent KR-20010050558-A (KR)
Inventor: MATSUMOTO NAOKI
IPC: H01L33/00
Filed: 2000-09-21
Abstract: PURPOSE: To provide a method for manufacturing GaN single-crystal with low dislocation which is 106 cm-2 or less. CONSTITUTION: In the crystal growing method of single-crystal gallium nitride, the growth surface of gaseous phase growth is provided with not a plane state but a three-dimensional facet structure, and crystal growth is realized while the facet structure is not embedded but maintained as it is so that dislocation can be reduced.
Patent KR-20010050642-A (KR)
Inventor: YAMAZAKI YASUSHI
IPC: H01L21/336
Filed: 2000-09-26
Abstract: PURPOSE: An electro-optic apparatus including a semiconductor device formed on a semiconductor layer placed on an insulating layer is provided which secures aperture rate and restricts substrate floating effect of SOI. CONSTITUTION: An electro-optic apparatus includes a plurality of scan lines, a plurality of data lines intersecting the scan lines, a pixel transistor connected to each scan line and each data line, a pixel electrode connected to the pixel transistor and a periphery circuit including a driving transistor for operating the pixel transistor, which are formed on a substrate constructed of a support substrate, the first insulating layer formed on the support substrate, and a semiconductor layer formed on the first insulating layer. Defect density of at least one of an area including the contact region of the channel region(3) and source region(4) of the pixel transistor and an area including the contact region of the channel region and drain region(5) is higher than that of the channel region.
Patent KR-20020026736-A (KR)
Title: Relay Protection Method used Triac
Inventor: KANG DAE HO
IPC: H05B6/66
Filed: 2000-10-02
Abstract: PURPOSE: A method for protecting a relay by using a triac is provided to prevent the burning of a contact terminal of the relay by reducing a spark generated at the contact terminal. CONSTITUTION: A control unit supplies a signal(S1) to a gate terminal of the triac during a predetermined time, so that the triac is turned-on during the predetermined time. A relay coil terminal signal(S2) is turned-off at the beginning of the predetermined time. In response to the relay coil terminal signal(S2), the power being supplied to a coil terminal is cut-off and the contact terminal of the relay is turned-off. A relay contact terminal signal(S3) represents the time required that the contact terminal is turned from on-state to off-state and the status of the contact. After a predefined time, the signal(S1) being supplied to the gate terminal of the triac is cut-off.