baber/WOPTO huggingface dataset:
Patent KR-20000009240-A (KR)
Title: Device for adjusting laser scanning unit
Inventor: UHM JAE YONG
IPC: B41J2/435
Filed: 1998-07-22
Abstract: PURPOSE: A device for adjusting a laser scanning unit is provided to adjust the interval between a skew and a focusing of the laser scanning unit and the laser scanning unit. CONSTITUTION: A device for adjusting a laser scanning unit comprises:a base(37) formed on a rectangular shaped plate being fixed in a frame(30); a first guide member(38) being installed near from the base toward "X" direction while containing a first face(38b); and a second guide member(36) combined to the first guide member by using a hinge bolt(34) for having the same hinge point with the first guide member. Herein, the second guide member is installed near from the base toward "Y" direction and is installed movably to the frame while containing a second face(36b) being formed on the plate crossing to a plate including the first face.
Patent KR-20000009452-A (KR)
Title: Apparatus and method for displaying possibility of telephone call in radio portable telephone
Inventor: CHO SEONG MIN
IPC: H04B17/00
Filed: 1998-07-24
Abstract: PURPOSE: An apparatus and a method for displaying possibility of telephone call are disclosed which enable the user of radio portable telephone to determine precisely the possibility of telephone call. CONSTITUTION: A controller(100) scans whether information concerning radio wave level of receiving signal is provided from a receiving signal radio level measurement unit(110). If so, the controller displays radio wave level indication bar corresponding to the received signal radio wave level. Further, the controller scans whether information relating to interference level of receiving signal is supplied from a receiving signal interference measurement unit(114). If so, the controller displays interference level indication bar corresponding to the received signal interference level. Since the possibility of telephone call in radio portable telephone is displayed as receiving signal radio wave level and receiving signal interference level at a time, the user of radio portable telephone can precisely determine the possibility of call.
Patent KR-20000009464-A (KR)
Title: Preparation method of (s)-3-carboxy-4-bromobutyric acid
Inventor: YU HO SEONG
IPC: C07C69/02
Filed: 1998-07-24
Abstract: PURPOSE: A process for preparing (S)-3-carboxy-4-bromobutyric acid by reacting (S)-3-hydroxybutyrolacton having optical activity with a bromination reagent and carboxylic acid is provided which gives high yield rate and optical purity. CONSTITUTION: (S)-3-Hydroxybutyrolacton is reacted with a bromination reagent and ROOH(R = 1-4C alkyl group) at 0-100°Cto give (S)-3-carboxy-4-bromobutyric acid(I). In (I), R is 1-4C alkyl group. For an example, 10g (S)-hydroxybutyrolacton(85%) and 40 ml bromic acid/acetic acid are poured into a 500ml flask having a thermometer, a reflux condenser and an agitator and stirred at 40-80°Cfor 3 hr. The reactant is cooled to room temperature, added with 200 ml methane chloride, washed with sodium acetate, and dried. An organic layer is rremoved, added with anhydrous magnesium sulfate to remove moisture, filtrated, and concentrated to give 17.2g (S)-3-acetoxy-4-bromobutyric acid(yield:92%). The compound is useful for an intermediate for manufacturing antibiotic and antihypertensive.
Patent KR-20000009817-A (KR)
Title: Energy obtaining method of large yield using buoyancy
Inventor: LEE SANG HA
IPC: F03B17/02
Filed: 1998-07-29
Abstract: PURPOSE: An energy obtaining method of large yield is provided to obtain the energy of large yield by using the buoyancy even though reducing the introduced energy to half. CONSTITUTION: The energy obtaining method of large yield is composed of the steps of:locking a valve(6) and filling a water tub(1) with water from outside; compressing a large tube(3) by giving the buoyancy to a plastic container(2); turning a propeller(4) by contracting the large tube(3) with its inside filled with air; moving water staying in the water tub(1) to another water tub(1') by opening the valve(6); descending the plastic container(2) and the large tube(3), that is, expanding the plastic container(2) and the large tube(3); and turning the propeller(4) again to generate power.
Patent KR-19990036599-A (KR)
Title: 습윤성이 개량된 변성 에틸렌계 수지
IPC: C08F255/02
Filed: 1998-08-14
Abstract: 본 발명에서는 에틸렌계 수지 (a)를, 말단이 탄화수소기인 폴리알킬렌옥시드 사슬을 갖는 α,β-불포화 카르본산 에스테르 (b)와, 방향족 비닐 화합물 (c) 및/또는 지방족 알코올의 α,β-불포화 카르본산 에스테르 (d)에 의해 변성시켜 얻어진 변성 에틸렌계 수지를 제공한다.  또한, (A) 에틸렌계 수지(a)를, 적어도 폴리알킬렌옥시드 사슬을 갖는 α,β-불포화 카르본산 에스테르 (b)를 사용하는 변성을 시킴으로써 얻어진 변성 에틸렌계 수지 80 내지 99.9 중량% 및 (B) 계면 활성제 0.1 내지 20중량%를 함유하여서 된 에틸렌계 수지 조성물을 제공한다.
Patent KR-20000014175-A (KR)
Title: Integrated mail service method using short message service and system therefor
Inventor: KO MIN SEOK
IPC: H04L12/28
Filed: 1998-08-18
Abstract: PURPOSE: An integrated mail service method using short message service and a system therefor are provided to make it possible to transfer mails without regard to existence or non-existence of a network connected to communication parties. CONSTITUTION: The inventive integrated mail service method includes the steps of: giving a communication party in wire or a communication party in wireless communication network a pseudo-identification used in wireless communication network; converting the pseudo identification and an ID of each party when an SMS message is transmitted and received between the party in wire through the wire communication terminal; and converting the SMS into data of E-mail type used in wire network or an e-mail into data of SMS type.
Patent KR-20000014303-A (KR)
Title: Telephony device bus control system of switching system
Inventor: LEE SEUNG WANG
IPC: G06F13/12
Filed: 1998-08-19
Abstract: PURPOSE: A telephony device bus control system of switching system is provided to simply the structure of the system and enhance the performance because the switching system and the control system are formed into one control module. CONSTITUTION: The telephony device bus control system of switching system comprises: a VME bus; a VME slave card(204) connected to said telephony device and a TD bus, transmitting the control command data about said telephony device connected to said VME bus to be input through said VME bus toward said telephony device, and storing the result data controlling said telephony device; and a controller(202) connected to said VME slave card through said VME bus, transmitting said control command data to said VME slave card, and performing the TD-bus related operation according to said result data stored in said VME slave card.
Patent KR-20000014875-A (KR)
Title: Control system of manufacturing facility of semiconductor device through communication network
Inventor: PARK DONG JIN
IPC: H04L12/28
Filed: 1998-08-25
Abstract: PURPOSE: A control system of manufacturing facility is provided which enables identification of data relating to process facility or measurement facility and control of operation thereof. CONSTITUTION: When process-related data which are inputted from a process facility(20) through a first communication network(24) and measurement-related data which are inputted from a measurement facility(22) through the first network are sent to a SECS(Semiconductor Equipment Communication Standard) host computer(28), a client computer(32) connects to the first network, and requests and receives each data. The client computer refers to the received data and determines whether normal operation is performed or not. If so, present operation state is maintained. If not, the client computer sends control signal relating to program change or operation control through a second communication network(26) which shares a LAN host computer(30), and controls the process facility or the measurement facility to perform normal operation. Thereby, data and control signal are transmitted through different networks, manufacturing facility management being effectively carried out.
Patent KR-19980087602-A (KR)
Title: 지하수 굴착공 막음 장치 및 방법
IPC: E21B33/06
Filed: 1998-09-01
Abstract: 본 발명은 지하수의 굴착공을 폐공시키거나 임시로 막아 두는 지하수 굴착공 막음 장치 및 방법에 관한 것으로서, 특히 팽창되어 굴착공을 막을 수 있도록 팽창성 있는 직물 또는 합성고무체로 이루어지고 팽창되기 위한 제 1유체가 담겨져 있는 팽창차폐 튜브와, 팽창차폐 튜브 내부에 설치되고 팽창차폐 튜브가 팽창되도록 제 1유체와 혼합되는 제 2유체가 담겨져 있는 유리병과, 제 1유체와 제 2유체가 혼합될 수 있도록 유리병을 타격에 의하여 깨뜨리는 파열봉과, 파열봉이 유리병을 깨뜨릴 수 있도록 탄성력을 제공하는 스프링과, 파열봉이 유리병을 깨뜨리기 전에 스프링이 수축된 상태에서 멈추어 있을 수 있도록 파열봉에 형성된 홈에 삽입되는 걸림 핀과, 코일과 철심으로 이루어져 파열봉이 유리병을 타격할 수 있도록 걸림 핀을 파열봉의 홈으로부터 빼내는 전자석과, 전자석에 전원을 공급시키는 전원장치를 포함하여 구성되어; 
     일반 지하수 굴착공 외에도 건설현장에서 시공되는 지하수 굴착공에 사용될 수 있고 지하수 굴착공이 일부 함몰된 경우에도 용이하게 삽입 및 설치가 가능하며 그 설치된 상태를 확인할 수 있으므로 그 신뢰도가 증대되는 효과를 제공하는 지하수 굴착공 막음 장치 및 방법(Underground well corking apparatus and the same method)에 관한 것이다.
Patent KR-20000021013-A (KR)
Title: Connecting structure for coma coil of deflection york
Inventor: YANG TAE JONG
IPC: H01J29/76
Filed: 1998-09-25
Abstract: PURPOSE: A connection terminal of a deflection york is equipped with many bolt having a coma coil. And a cap within nut is possessed on the edge of each bolt to increase the bonding. CONSTITUTION: A circuit plate(140) equipped with several connection terminals(141) is perpendicularly fixed to the sides of neck part(121). The connection terminals equipped with many bolts(141a). And a coma coil(130) is inserted in a grooved slot(121a) of neck. The inserted coma coil is drawn out along the surface of neck and rounds the bolts(141a). A cap(150) within nut(151), which is rounded by the coma coil, is possessed on the edge of each bolt. So the coma coil is fastened to connection terminals without a solder and a cutting.
Patent KR-20000021858-A (KR)
Title: Method for encoding outline and apparatus
Inventor: KIM JIN HEON
IPC: G06T9/00
Filed: 1998-09-30
Abstract: PURPOSE: A method for encoding an outline and apparatus are provided to reduce an amount of a transmission data as effectively approximating using a poly approximation an outline of an object presented by an image signal using an improved peak detection method. CONSTITUTION: A method for encoding an outline and apparatus include eight procedures. A first procedure is to detect a starting peak in outline comprising a large number of outline pixels. A second procedure is to select a pair of the peak adjacent between the detected peaks comprising the starting peak. A third procedure is to generate a line segment connecting the pair of the peak using the large number of pixels. A fourth procedure is to expend each pixel on the line segment and generate a band segment using a critical value established in advance. A fifth procedure is to detect an outline segment corresponding to the line segment from the outline. A sixth procedure is to match the outline segment to the band segment. A seventh procedure is to expend the band segment and decide a new peak locating between pairs of peak on the outline. An eighth-procedure is to repeat the second procedure through the seventh procedure until a peak information which designates a position of all peaks on the outline is provided as all peaks on the outline is detected.
Patent KR-20000024714-A (KR)
Title: Method for forming cylinder type lower electrode of capacitor
Inventor: KIM SEUNG WOOK
IPC: H01L29/40
Filed: 1998-10-01
Abstract: PURPOSE: A method for forming cylinder type lower electrode of capacitor is provided to restrain the crack of a nitration film formed to a lower portion of a FSG film by forming a cylinder type lower electrode of a capacitor using the FSG film. CONSTITUTION: A nitration film(32) is formed on a semiconductor substrate(30) in which a forming of a bitline(31) is completed for preventing an oxidation of the bitline(31). An FSG film(33) with 5000 to 20000 angstrom thickness is formed using a high density chemical vapor deposition and is formed in 200 to 600 deg.C. The FSG film(33) and the nitration film(32) are selectively etched and the semiconductor substrate(30) connected to a lower electrode is exposed, and then a poly silicon film(34) is formed. The poly silicon film(34) is etched and then a cylinder type lower electrode(34A) is formed to a cell region(A). The FSG film(33) is performed by a wet etching and then the lower electrode(34A) is exposed.
Patent KR-20000027078-A (KR)
Title: Automatic printing system and automatic editing method
Inventor: BAEK SEUNG JUN
IPC: H04N5/262
Filed: 1998-10-26
Abstract: PURPOSE: An automatic printing system and automatic editing method are to replace a data for a predetermined part among a plurality of face data of a specific person with data of a part corresponding to a face data of a user photographed by camera, and print the data through a recording medium. CONSTITUTION: A digital still camera(100) photographs a specific point in the face part of person fixed at a predetermined position as a base point, and outputs a processed image signal. An automatic editor(200) outputs a photograph start control signal to the digital still camera, outputs a control signal to transmit a photographed face data, and controls a face data inputted from the digital still camera. A printer(300) prints the face data processed in an automatic printer through a recording medium according to the control signal of the automatic editor. The automatic editor comprises a system memory(210), a database unit(220), a signal processing unit(230), a controlling unit(240), a synthesizing unit(250), and a correcting unit(260). The system memory comprises a booting program so that it is driven after initializing an automatic printing system according to an automatic printing managing program when a power supply is applied to the system.
Patent KR-20000032711-A (KR)
Title: Method of controlling gas boiler to rapidly boil hot water of certain temperature
Inventor: PARK JAE KYEONG
IPC: F24H1/00
Filed: 1998-11-17
Abstract: PURPOSE: A method of controlling a gas boiler is provided to boil water rapidly and to feed the hot water continuously. CONSTITUTION: A gas boiler is controlled by the steps of: starting to ran a gas boiler in a heating/hot-water mode and detecting if hot water will be used through the combustion time of gas and the temperature of heating water; turning on a flow valve and driving an exhaust fan to perform a pre-purge process if the combustion time is more than a certain degree or the temperature of heating water is higher than a certain temperature range; driving a gas valve and an ignition plug step by step to ignite gas; and performing the pre-purge process again if the gas is not ignited, or performing a hot-water mode by continuing to ignite the gas. The hot water is boiled rapidly and fed continuously by controlling the hot-water mode of the boiler without chattering time through the method.
Patent KR-19990045392-A (KR)
Title: 열에 안정한 산화철 황색 안료
IPC: C09D7/48
Filed: 1998-11-18
Abstract: 5 미만의 실킹 인덱스를 갖고, 폴리에틸렌 중에서 220 ℃가 넘는 온도에서 5 분 이상의 내열성을 갖는 순색 산화철 황색 안료는 금속철을 원소들의 주기율표의 주족 3 및 4족으로부터 선택된 화합물의 존재하에 산 매질 중에서 니트로벤젠과 함께 산화시킴으로써 얻어진다.
Patent KR-19990045493-A (KR)
Title: 휴대 전화 시스템용 레이크 수신기, 이동 장치 및 기지국과 이들의 사용방법
IPC: H04L7/00
Filed: 1998-11-19
Abstract: 동기 획득을 수행하기 위하여 수신 신호를 추출하는 데시메이팅 수단(2)과; 얻어진 동기 클럭으로부터 수신 신호를 추출하는 데시메이팅 수단(1)과; PN 코드를 이용하여 데시메이팅 수단(2)에 의해 추출된 수신 신호를 디스프레드하며, 그 결과 데이터를 타임 트랙킹 수단(9)에 공급하는 디스프레딩 수단(4)과; 데시메이팅 수단(1)에 의해 추출된 수신 신호를 디스프레드하는 디스프레딩 수단(3); 및 디스프레딩 수단에 PN 코드 및 광대역 PN 코드를 스위칭하여 출력하는 선택 수단(5, 6)을 포함하여 구성되는 레이크 수신기가 제공된다. 파일럿 캐리어 트랙킹 수단 및 데이터 패스 복조 수단에 공급되는 데이터는 이들 수단에 공통인 디스프레딩 수단(3)을 이용함으로써 디스프레드된다. 디스프레딩 수단의 수가 두 개로 감소될 수 있다.
Patent KR-19990071431-A (KR)
Title: 접동부품의 제조방법 및 그 제조방법에 의해 제조된 분사밸브의선회류 발생체
IPC: B22F3/22
Filed: 1998-12-01
Abstract: 본 발명은 SUS 440C 상당 원료의 금속사출성형에 의해 성형품의 고치수정밀도화, 고경도화 및 저공공율화를 실현할 수 있는 접동부품의 제조방법 및 그 제조방법에 의해 제조된 분사밸브의 선회류 발생체를 얻는다. SUS 440C 상당 재료의 원료분과이 원료의 산소 함유량에 맞는량의 그래파이트 카본 및 바인더를 혼합해서 된 성형용 콤파운드를 사용해서 사출성형한다.(사출성형 공정 100). 계속해서 얻어진 성형체를 중성 분위기중에서 가열하고 성형체중의 바인더의 거의 전량을 제거한다(탈지공정101). 계속해서 탈지된 성형체를 실온으로부터 1000℃까지 0.1333Pa 이하의 진공중에서 가열해서 C+0→CO의 반응에 의해 성형체의 함유 산소량을 0.02% 이하로 한후 133.3 ~ 3999Pa의 알곤분위기 중에서 1250℃까지 승온해서 2시간 보존해서 성형체를 소성한다(소성공정 103).
Patent KR-20000040301-A (KR)
Title: Method for making transition of state of menu using submenu
Inventor: KIM YONG WAN
IPC: H04B1/38
Filed: 1998-12-17
Abstract: PURPOSE: A method for making a transition of the state of a menu using a submenu is provided to enable a transition to a detailed function of the submenu under the state that the menu is displayed, and show more information to a user, by deleting the submenu after executing the function of the submenu. CONSTITUTION: If an initial menu selection screen is shown(201), a controller checks that one of the menus on the initial menu selection screen is selected(203). If a menu has been selected, the controller displays the information corresponding to the selected menu(205). After the display of the information, the controller checks whether a submenu selection key is pressed(207). If a submenu selection key has been pressed, the controller displays a plurality of submenus corresponding to the displayed menu(209). These submenus are displayed on a lower part of a displayer while the menu is still displayed. The controller checks whether one of the submenus is selected(211). If any submenu has been selected, the controller performs the selected submenu and deletes it and then displays executed information of the selected submenu(213).
Patent KR-20000041057-A (KR)
Title: Method for detecting badness of printed circuit board
Inventor: NAM CHANG HYUN
IPC: G01R31/28
Filed: 1998-12-21
Abstract: PURPOSE: A badness detecting method of a printed circuit board is provided to test a laser equipment, becoming a badness cause, and a badness position by forming a mark at a dummy region of each sheet of a substrate. CONSTITUTION: In a badness detecting method of a printed circuit board, a plurality of sheets(22) are processed on a line of a panel(21). Each of the sheets(22) of the plurality has two piece regions(24a,24b) at which an actual electric device is mounted. A marking(26) for detecting a badness is formed at a dummy region(28) of the respective sheets(22) expect for the piece regions(24a,24b). The marking(26) displayed at each sheet(22) indicates a number of a laser equipment and a number of a corresponding sheet number.
Patent KR-19990063276-A (KR)
Title: 물체의 검사에 사용하기 위한 와류 프로브 및 물체의 검사 방법
IPC: G01N27/90
Filed: 1998-12-21
Abstract: 물체의 검사에 사용하기 위한 와류 프로브는 유효 코일 축을 갖는 코일을 구비한 드라이버를 포함하며, 상기 드라이버 코일의 유효 코일 축에 실질적으로 수직으로 배향된 코일 축을 갖는 리시버를 더 포함한다.  상기 리시버는 길이와 폭을 갖되, 그 길이는 스캐닝 경로에 평행한 방향의 치수이고, 폭은 길이의 치수보다 실질적으로 큰 치수 크기를 갖는다.  물체의 검사 방법은 그러한 와류 프로브를 사용한다.  물체의 검사에 사용하기 위한 와류 프로브는 유효 코일 축을 갖는 코일을 구비한  드라이버를 포함하며, 상기 드라이버는 길이와 폭을 가지되, 그 길이는 스캐닝 경로에 실질적으로 평행한 방향의 치수이다.  또한, 상기 와류 프로브는 드라이버 코일의 유효 코일 축에 실질적으로 수직으로 배향된 코일 축을 갖는 코일을 구비한 리시버를 포함한다.  리시버와 연부중 적어도 하나 사이의 거리는 드라이버의 폭의 0.125배 미만이다.  물체의 검사 방법은 그러한 와류 프로브를 사용한다.
Patent KR-19990063381-A (KR)
Title: 반도체 기억장치
IPC: G11C7/02
Filed: 1998-12-23
Abstract: 반도체 기억장치는 동일한 싸이클에서 판독 및 기록 동작이 실행되는 동안 판독 데이터에 대한 기록 데이터의 크로스토크를 제어한다. 상기 장치는 복수의 워드선(WL)과, 복수의 비트선(LBL)과, 상기 워드선과 비트선에 접속된 메모리셀(CELL)과, 센스앰프(SA)에 접속된 판독용 전역 비트선(RGBL) 및 기록앰프(WA)에 접속된 기록용 전역 비트선(WGBL)을 포함한다. 선택회로(YSWn)는 판독용 및 기록용 전역 비트선과 지역 비트선을 선택적으로 접속한다. 제1 및 제2 기록용 전역 비트선이 제1 및 제2 판독용 전역 비트선 사이에 배치되기 때문에, 제1 기록용 전역 비트선과 제1 판독용 전역 비트선 사이의 거리 또는 제2 기록용 전역 비트선과 제2 판독용 전역 비트선 사이의 거리는, 제1 및 제2 기록용 전역 비트선 사이의 거리보다 더 크다. 또한, 기록용 및 판독용 전역 비트선은 반도체 기억장치의 기판에서 상이한 배선층에 형성된다.
Patent KR-20000041985-A (KR)
Title: Audio equalizer of television
Inventor: KIM YEON SU
IPC: H04N5/60
Filed: 1998-12-24
Abstract: PURPOSE: An audio equalizer of a television is provided to obtain an optimum audio state by automatically emphasizing an acoustic band in a stereo broadcast signal and emphasizing a sound band in the case of a bilingual broadcast signal. CONSTITUTION: A stereo equalizing controller(80) outputs an equalizing control signal for an audio equalizing processing in order for a sound to be stronger than a voice if an audio mode is judged as a stereo mode. A bilingual equalizing controller(90) outputs the equalizing control signal for the audio equalizing processing in order for the voice to be stronger than the sound if the audio mode is judged as a bilingual mode. An equalizer(100) adjusts by an audio band a multi-voice signal applied from a circuit(70) and equalizes the adjusted multi-voice signal.
Patent KR-20000042321-A (KR)
Title: Structure of limiting knob rotation in air conditioner
Inventor: SEONG WAN YONG
IPC: F24F13/00
Filed: 1998-12-24
Abstract: PURPOSE: A structure of preventing the rotation of a control knob is provided to prevent the control knob from being suddenly converted between a cooling mode and a blowing mode. CONSTITUTION: A control knob(200) includes a straight cap(210) protruded toward the front direction of a front panel(400) and a flange(220) extended from the rear end of the cap toward a radius direction. A nave unit(230) with a hole(235) is formed in the rear center of the flange for being matched with an operating rod(325) of a rotary switch(320) controlling various operating modes of the air conditioner. And a rib(250) is formed in a certain location on the inner circumference of the flange for preventing the direct conversion between a 'low cool' mode and a 'low fan' mode. Moreover, first and second protrusions(410,420) are formed on the front panel while containing a certain space. Herein, the protrusions are located between the 'low fan' mode and the 'low cool' mode. Thus, when the control knob is located at a first location converting the rotary switch into the 'low fan' mode or located at a second location converting the rotary switch into the 'low cool' mode, the protrusions contact with the rib. Therefore, the control knob is not rotated any more.
Patent KR-20000042352-A (KR)
Title: Window type air conditioner having structure of preventing dew
Inventor: LEE WANG GU
IPC: F24F1/02
Filed: 1998-12-24
Abstract: PURPOSE: A window typed air conditioner is provided to prevent dew from being formed by venting cooled air to the upper surface or to the lower surface of a housing. CONSTITUTION: In operating of a window typed air conditioner(500), a motor is driven for rotating a blow fan(430). Therefore, outdoor air is flowed into a housing(400) through an absorbing grill(412). Then, the absorbed air is cooled by heat exchange for being guided to a vent duct(414) of cooled air through a circular hole(445) and a cooled air vent hole(450). Herein, the vent duct of cooled air is combined to an inserting groove(455) formed around the cooled air vent hole not to discharge cooled air to outside. Therefore, the generation of dew on the upper surface of the housing is prevented while improving cooling efficiency.
Patent KR-20000043323-A (KR)
Title: Axial type optical pickup actuator having magnetic circuit
Inventor: LEE GEUN JONG
IPC: G11B7/08
Filed: 1998-12-28
Abstract: PURPOSE: An optical pickup actuator having a magnetic circuit is provided improve a driving sensitivity by reinforcing a magnetic field passed a coil. CONSTITUTION: A magnetic closed circuit is formed to enter a magnetic flux from an N polar of a first magnet(134) into an S polar of a third magnet and the magnetic flux from an N polar of the third magnet(140) into an S polar of the first magnet via a coil(120). A fine driving force of focusing direction is generated from the coil. A magnetic closed circuit is formed to enter the magnetic flux from the N polar of the third magnet into an S polar of a fourth magnet(142) and the magnetic flux from an N polar of the fourth magnet into an S polar of a second magnet(136) via the coil. The fine driving force of tracking direction is generated from the coil. An optical pickup actuator is formed the magnetic circuit to circulate the magnetism in a lens holder(110). Thereby, the driving sensitivity of the lens holder is improved by reinforcing the magnetic flux passed the coil.