baber/WOPTO huggingface dataset:
Patent KR-20040059734-A (KR)
Title: Method for fabricating capacitor of semiconductor device
Inventor: PARK SANG HYEOK
IPC: H01L27/108
Filed: 2002-12-28
Abstract: PURPOSE: A method for manufacturing a capacitor of a semiconductor device is provided to prevent collapse of patterns by forming a photoresist layer in a cylindrical storage node. CONSTITUTION: An ILD(InterLayer Dielectric)(31) is formed on a substrate having a cell transistor. A nitride layer(32) as a stopper, an isolating layer, a hard mask layer are sequentially stacked on the ILD. By selectively patterning the stacked structure, capacitor holes are formed to expose a storage node plug of the cell transistor. An amorphous polysilicon layer is formed on the capacitor holes. A photoresist layer(36) is coated to entirely fill the capacitor holes. By etch-back of the amorphous polysilicon layer, a storage node(35a) is formed. The photoresist layer is then removed.
Patent KR-20040062149-A (KR)
Inventor: LEE JAE GYUN
IPC: G02F1/133
Filed: 2002-12-31
Abstract: PURPOSE: An LCD(liquid crystal display) is provided to reduce power consumption of an in-plane switching mode LCD. CONSTITUTION: An LCD includes gate lines(G11,G12,G13,G14,G1n) and data lines(D11,D12,D13,D1m) arranged in an intersecting manner on a substrate to define pixels, the first and second electrodes formed in the pixels to apply an in-plane electric field to a liquid crystal layer, and a switching element(TFT1) that supplies image information to the first electrode or blocks the supply of image information. The LCD further includes the first common voltage lines that provide the first common voltage to the second electrodes of pixels corresponding to odd-numbered gate lines, and the second common voltage lines that provide the second common voltage to the second electrodes of pixel corresponding to even-numbered gate lines. The LCD also has a liquid crystal capacitor(Clc) and a storage capacitor(Cst). The liquid crystal capacitor is formed between the switching element and the first or second common voltage lines. The storage capacitor is formed between the switching element and the first and second common voltage lines. The storage capacitor is alternately connected to the first and second common voltage lines in adjacent pixels.
Patent KR-20020025179-A (KR)
IPC: C07D209/42
Filed: 2000-07-07
Abstract: 본 발명은 화학식 I의 화합물: 
     [화학식 I] 
     
       
     
     (상기 식에서, R 1 및 R 3 는 청구항 1의 의미를 가진다) 
     에 관한 것이다.  상기 화합물은 강력한 5-HT 2A -길항제이고, 정신병, 정신분열증, 우울증, 신경학적 장애, 기억장애, 파킨슨병, 근위축성 외측 경화, 알츠하이머병, 헌팅톤병, 섭식장애, 예를 들어, 신경성 대식 및 식욕부진, 및 생리전 증후군 및/또는 결정적인 영향을 미치는 강박장애(망상-강박장애, OCD)를 치료하는 데 적합하다.
Patent KR-20020021666-A (KR)
IPC: A21C11/16
Filed: 2000-07-06
Abstract: 압출기용 다이판 (42) 은 한 측면에서는 유체구동원동기 (52) 에 연결되고, 다른 측면에서는 압출기 (40) 에 직접 연결된다.    적당한 유체입구 (56) 및 유체출구 (60) 통로가 원동기 (52) 에 유체를 공급하고 배출하기 위해 다이판내에 형성된다.    커터조립체는 원동기 (52) 를 수용하기 위해 하우징 (47) 을 함유하며 원동기로부터의 출력축 (64) 에 회전하도록 연결되어 있어,  사용시 하우징 (47) 에 장착된 블레이드 (48) 가 압출물의 경로로 회전하며 압출물을 절단하게 된다.
Patent KR-20020038686-A (KR)
IPC: H04L1/00
Filed: 2001-05-09
Abstract: 적정한 레플리카를 생성하여 사용자간의 간섭을 작게 할 수 있는 간섭 제거기.  FEC 복호 후의 신호를 하드 판정하여 얻어진 신호의 오류를 검출하여, 오류가 검출된 경우, 오류가 있는 신호에 대해서는 가중 계수의 값을 작게 하여 레플리카를 생성하거나, 또는, FEC 복호 전의 임시 판정값(하드 판정값 또는 소프트 판정값)을 이용하여 레플리카를 생성한다.  또한, 이전 스테이지에서의 오류 검출 결과가 OK일 경우에는, 이전 스테이지에서의 하드 판정값을 이용하여 레플리카를 생성한다.
Patent KR-20020040754-A (KR)
Filed: 2000-08-04
Abstract: 하기식 (Ⅰ)에 의한 헤테로 사이클릭 방향족 아미드(HAA)가 제공된다. 이 발명은 그 수화물, 염 및 복합체를 포함한다. 
     이들 화합물은 살균제로서 유용하다. 
       [식1]    단, X 1 -X 4 ,M,Z 및 A는 정의되어 있다.
Patent KR-20020025218-A (KR)
Title: Method and apparatus for dynamic control of talk groups in a wireless network
IPC: H04L12/56
Filed: 2000-08-02
Abstract: A transceiver device (50) acting as a master (2) among a plurality of communication devices (1 and 12) potentially acting as slaves to the master (2). The transceiver device (50) includes a transmitter (68), a receiver (54) coupled to the transmitter (68), and a processor (58) coupled to the transmitter (68) and the receiver (54). The processor (58) is programmed to poll the slaves at a first interval and then receive a communication request while polling from a first slave of the plurality of communication devices to communicate with at least a second slave of the plurality of communication devices. The master (2) then designates communication parameters for communication between the first slave and at least the second slave and then polls at a re-polling interval the first slave and at least the second slave to confirm the termination of communication between the first slave and at least the second slave.
Patent KR-20020059436-A (KR)
Title: Estimation of cardiac ejection fraction and end diastolic volume
IPC: A61B5/0275
Filed: 2000-12-01
Abstract: The invention estimates a cardiac performance value such as cardiac output (CO) and cardiac ejection fraction (EF) by sensing a downstream indicator concentration signal y(t) that corresponds to an indicator (preferably heat) signal x(t) injected upstream in a patient's blood channel. The signal x(t) is preferably generated as a series of alternating transitions between a high state and a low state, such as a PRBS signal. The signal y(t) is then divided into at least one sub-signal that is synchronous with x(t). A decay parameter τ that minimizes a cost function that includes a time-domain channel relaxation model is then calculated. The cardiac performance value is then calculated based on this value for τ. For each transition of the injected indicator signal, a corresponding segment of the indicator concentration signal is preferably isolated, and a segment relaxation parameter is then calculated. The decay parameter τ is then estimated as a predetermined function of the segment relaxation parameters. In embodiments of the invention in which x(t) is periodic, the invention also generates estimates of τ by finding the minimum of a cost function between a model of the channel and an average of several cycles of y(t), each corresponding to one period of x(t).
Patent KR-20030062232-A (KR)
Title: Improving des hardware throughput for short operations
IPC: H04L9/12
Filed: 2001-04-30
Abstract: A system for executing a symmetric key cryptographic method includes a processor selecting data paths, a key, an initialization vector, a memory storing batched operation parameters, a bus connected to the processor and the memory, a cryptographic processor connected to the bus and controlled by the processor for performing a plurality of operations according to the operations parameter, wherein data for each operation is received individually and separately from the batched operation parameters, wherein an output for each operation is transmitted separately, and a pair of first-in-first-out (FIFO) state machines controlled by the processor and selectably connected to one of the cryptographic processor and the bus, bypassing the cryptographic processor.
Patent KR-20020091264-A (KR)
Title: 철광석 환원 방법 및 설비
IPC: C22B1/216
Filed: 2001-05-17
Abstract: 본 발명은 그레이트 상에 철광석 원료를 침착시키고 공급원료가 적어도 세가지 다른 영역을 지나가도록 그레이트를 이동시키는 단계; 유입 가스라 불리는 가스들을 하나 이상의 영역에 유입시키고, 고온 가스 탄소질 환원제를 포함하며 유입 가스들이 그레이트 상에 위치된 광석을 통과하도록 힘을 가하는 단계; 및 상기 힘이 가해진 경로를 야기하는 가스, 소위 배출 가스를 포획하는 단계로 구성된 해면철을 제조하기 위한 철 환원 방법에 관한 것이다. 유입 가스의 진행은 광석을 850~1300℃의 온도까지 끌어올리고; 60~100% 범위의 철광석 금속화 비율이 수득될 때 까지 상기 공급원료를 상기 온도로 유지한다. 그레이트 상에 침착된 공급원료는 5~40mm로 측정된 철광석, 또는 5~20mm 범위의 직경을 갖는 철광석 펠렛, 또는 2~10mm 크기의 철광석 그래뉼, 및 150~600mm의 침착된 층의 두께로 구성된다. 그레이트 상에 침착된 공급원료를 통과하는 유입 가스의 플럭스는 하향하고 500~200 물 컬럼의 압력 하에서 그레이트 아래에서 생성시켜 수득된다. 적어도 하나의 진행 영역의 공급원료를 통해 유입 가스의 힘이 가해진 유동은 그레이트 아래에서 포획된 배출 가스의 적어도 일부로 구성되고, 상기 배출 가스는 적어도 스크러빙, 탈황, 건조, 먼지 제거, 재가열 및 카보네이트 제거 등의 처리를 거치는 그레이트 아래에서 포획된다.
Patent KR-20030017532-A (KR)
IPC: G06F11/14
Filed: 2001-06-06
Abstract: 컴퓨터 시스템은 시스템내에서 장애가 발생되는 경우 데이터를 손실하게 된다. 이러한 데이터의 손실을 방지하기 위해, 백업 시스템이 이용될 수 있다. 통상적인 백업 시스템은 기억 장치 상의 데이터 또는 기억 장치 상에서 변경된 데이터를 복사한다. 데이터를 백업하는 처리는 비교적 많은 양의 데이터의 저장을 포함할 수 있기 때문에 하루에 한번 등과 같이 통상적으로 드물게 수행된다. 컴퓨터의 데이터가 하루에 한번만 백업되는 경우, 컴퓨터 시스템에 장애가 발생되는 경우 많은 시간의 데이터가 손실될 수 있다. 본 발명의 실시예는 더욱 빈번하게 백업함으로써 이러한 유형의 데이터 손실을 방지하는데 이용될 수 있다. 더욱 빈번하게 백업하기 위해, 한번에 더욱 적은 양의 데이터가 백업된다. 데이터의 대규모의 백업을 빈번하게 수행하는 대신에, 본 발명의 실시예는 컴퓨터 시스템에 의해 수행되는 기억 장치 기록의 타이밍된 로그를 형성한다. 로그는 동작에 관한 실행 화상을 컴퓨터 기억 시스템에 제공한다. 예컨대, 네트워크 연결을 통해 원격 사이트에서 그것을 저장하는 등의 로그를 유지함으로써, 컴퓨터 상태는 로그 엔트리를 이용하여 임의의 원하는 시간에 컴퓨터 시스템내의 데이터 상태를 재생성함으로써 임의의 원하는 입도로 재생성될 수 있다.
Patent KR-20030034112-A (KR)
Title: Neuroprotective 7-beta-hydroxysteroids
IPC: A61P25/28
Filed: 2001-06-29
Abstract: 3-Hydroxy-7β-hydroxy steroids and 3-oxo-7β-hydroxy steroids and pharmaceutically acceptable estors thereof are useful for protection against neuronal damage.
Patent KR-20040062302-A (KR)
Inventor: LEE MIN
IPC: H04N5/225
Filed: 2003-01-02
Abstract: PURPOSE: A CCD camera using infrared rays is provided to reduce the number of cameras required for monitoring a main monitoring area by expanding a night image pickup range. CONSTITUTION: A glass plate(2) has a lens hole(1) in the center. A glass plate case(3) supports the glass plate. A C/CS lens mount(4) is placed at the inside opposite to the lens hole. A plurality of IR-LED(Infrared Rays-Light Emitting Diode)s(5) are arranged at a circumferential part of the C/CS lens mount for emitting infrared rays through the glass plate. A CCD(Charge Coupled Device) camera part(6) picks up an external image through a C/CS lens. A control board(7) controls the CCD camera part and the IR-LEDs. An optical sensor(8) detects the external intensity of illumination so that the control board recognizes the result of the detection. A DC(Direct Current) adapter(9) supplies a direct current voltage to each part. A fan driving unit(10) receives the voltage for driving a cooling fan(11).
Patent KR-20040063582-A (KR)
Inventor: KIM JEONG TAK
IPC: B62D6/00
Filed: 2003-01-08
Abstract: PURPOSE: An auxiliary steering force control method of an electronic power steering system is provided to obtain the optimum steering feeling by determining driving conditions of a vehicle by an ECU with a variable ratio of vehicle speed or a variation of steering torque to control the auxiliary steering force. CONSTITUTION: An auxiliary steering force control method of an electronic power steering system comprises steps of inputting vehicle speed and steering torque signals among sensor detection signals detected and output from a sensor part by an ECU(Electronic Control Unit)(S1); finding a variable ratio of vehicle speed and a variation of steering torque from the vehicle speed and steering torque signals input from the first step and determining driving conditions of a vehicle from the variable ratio of vehicle speed and the variation of steering torque(S2); and properly controlling auxiliary steering force by outputting a motor control signal and a drive signal to motor control and drive parts according to the driving conditions of the vehicle determined from the second step(S3).
Patent KR-20040063588-A (KR)
Inventor: ISHIGAKI MAKOTO
IPC: B01D25/12
Filed: 2003-01-08
Abstract: PURPOSE: To simultaneously clean a plurality of fabric filters of filter plates, shorten cleaning time of the fabric filters and separate cake, and shorten discharge time of the cake by vibrating the plurality of the fabric filters at the same time. CONSTITUTION: The press filter comprises a plural filter plates(4) arranged in a row on rails(3) supported to front frame(1) and rear frame(2) in such a way that the filter plates are opened and closed; and fabric filters suspended to filter board of the plural filter plates, wherein the fabric filters are loosely installed at the filter plates by supporting support rods to guide shafts set up on the filter plates through springs, installing a liquid supply plate communicated with a filtrate supply way of the filter plates at the fabric filters and installing a heavy weight on the edge of a lower part of the fabric filters and suspending the edge of an upper part of the fabric filters to the support rods.
Patent KR-20040067188-A (KR)
Inventor: LEE YEONG IL
IPC: H05K13/04
Filed: 2003-01-22
Abstract: PURPOSE: An apparatus for forming a lead line of an electronic component is provided to prevent damage of a lead line and exchange easily a bending tip by shifting plural bending tips to opposite directions to bend the lead line. CONSTITUTION: An apparatus for forming a lead line of an electronic component includes a fixing block, a slide block, a bending block, and an elastic member. The slide block(20) includes a push rod(21) located on an upper side of the fixing block(10). The push rod has a tapering side(21a). The slide block is shifted to the fixing block by a driving device. The bending block includes a rolling friction device(34), a hinge shaft(31), and a bending tip(33). The elastic member(40) is fixed to the fixing block. In addition, the elastic member is used for supporting the bending block.
Patent KR-20030074132-A (KR)
Title: 전기 커넥터
IPC: H01R12/79
Filed: 2003-01-29
Abstract: 본 발명은 절연 하우징, 복수의 도전성 단자 및 커버 본체를 포함하는 전기 커넥터를 제공한다.  커버 본체는 사용자에 의해 절연 하우징에 대한 제1 위치, 제2 위치 및 제3 위치 사이에서 이동되어서, 커버 본체가 제1 위치로부터 제2 위치로 이동될 때, 전자 카드의 전기 접촉부와 도전성 단자의 접촉 부분이 서로에 대해 가압된다.  커버 본체가 제2 위치로부터 제3 위치로 이동될 때, 전기 카드는 커버 본체와 함께 동시에 이동하여서, 전자 카드의 전기 접촉부와 도전성 단자의 접촉 부분이 먼지 또는 오염물을 닦아내도록 단거리 상대 이동을 통해 서로 마찰 접촉한다.  이는 이들의 전기 접속의 신뢰도를 증가시킨다.
Patent KR-20040070417-A (KR)
Inventor: EUN GIL GWAN
IPC: B29C63/26
Filed: 2003-02-03
Abstract: PURPOSE: A method and device for impregnating a tube liner is provided to reduce working time and prevent the pressed tube liner from being wrinkled by controlling the amount of resin regardless of the length and width of the tube liner. CONSTITUTION: A device for impregnating a tube liner is composed of a loading unit, a pressing unit(50) disposed above the loading unit, a feed unit(30) disposed between the top of the loading unit and the pressing unit, and a recovery unit(60). The loading unit includes a loading plate(42) on which the tube liner is put, a driving motor(44), and a chain belt. The pressing unit includes a rotary roller(54) for pressing the tube liner, and a rack gear(56). The feed unit includes a pinion gear(34) engaged with the rack gear, a plurality of support plates(32), and a plurality of bearings. The recovery unit includes a wheel for drawing and winding the pressed tube liner to prevent the tube liner from being wrinkled.
Patent KR-20040072076-A (KR)
Inventor: SHIN DONG MYEONG
IPC: G03G21/00
Filed: 2003-02-08
Abstract: PURPOSE: A printing method capable of adaptively saving a toner is provided to automatically check contents of a printed matter, and to adaptively set and release a toner saving mode, thereby preventing picture quality from deteriorating. CONSTITUTION: A system counts the frequency of transition on a unit page of a video pulse having a determined level by corresponding to video data, and accumulates counted results(10). The system divides the accumulated results by the number of entire dots of the unit page, and determines divided results as a period value(12). The system decides whether a toner saving mode is set(14). If so, the system decides whether the period value is smaller than a predetermined reference value(16). If so, the system prints a paper in the toner saving mode(18). If the divided results are not smaller than the reference value or the toner saving mode is not set, the system prints the paper in a general mode(20).
Patent KR-20040074756-A (KR)
Inventor: JANG HAK SUN
IPC: H04B7/155
Filed: 2003-02-18
Abstract: PURPOSE: A digital satellite broadcast repeater having an identification code is provided to allow a receiver for receiving data from a satellite broadcast repeater to discriminate the repeater by making the satellite broadcast repeater add a channel to transmit its identification code when re-transmitting the data. CONSTITUTION: A demultiplexer(400) demultiplexes source data obtained by demodulating data received from a satellite, separates it into N number of I and Q channels, and transmits them to a CDM(Code Division Multiplex) modulator(410). A channel generator(450) generates (N+1)th I and Q channels and transmits them to the CDM modulator(410). A controller(460) transmits a PN code select data to be used for allocation to every I and Q channel, to the CDM modulator(410). The CDM modulator(410) receives the N number of I and Q channels from the demultiplexer(400) and the (N+1)th I and Q channels from the channel generator(450). The first filter(420) and the second filter(430) receive the m number of I and Q channels from the CDM modulator(410), converts them into the k number of I and Q channels, performs QPSK(Quadrature Phase Shift Keying) on them, and then, outputs them. A digital up-converter(440) converts data outputted from the first and second filters into output frequencies, and re-transmits them by using a transmission antenna.
Patent KR-20040076481-A (KR)
Inventor: KIM SI HAN
IPC: G06F1/16
Filed: 2003-02-25
Abstract: PURPOSE: A portable display device is provided to fold/unfold a panel housing installing the displays, and protect a flexible circuit connecting line by hiding the circuit connecting line. CONSTITUTION: The device is equipped with two panel housings(20,40) installing two displays(2,4). When the device is unfolded, one screen is formed by contacting one side of each display with each other. The panel housings are connected by a connecting tool(6) to fold/unfold the panel housings. The connecting tool comprises a cap shaft and an inserting shaft. The circuit connecting line(83) passes the circuit connecting holes(81,82,81a,81b) formed to each panel housing.
Patent KR-20040078226-A (KR)
Inventor: LEE JONG GUK
IPC: H04W88/02
Filed: 2003-03-03
Abstract: PURPOSE: A simple apparatus for displaying a remote situation by a CDMA(Code Division Multiple Access) communication method is provided to conveniently display traffic situations at a distance. CONSTITUTION: A central control unit(20) monitors data related to the traffic situation of a field at a distant place and transmits the data to the field. A field operation control unit(10) receives the data from the central control unit(20), and operates a state display plate to appropriately change state display contents. The field operation control unit(10) comprises as follows. A wireless mobile communication unit(16) wirelessly receives data transmitted from the central control unit(20) at a distance. A controller(11) serial transmits the received data and gives a control command to a state display part. A motor(17) is driven at several angles by the control command from the controller(11). A power source supplies a current to the motor(17) and the controller(11). The state display plate is connected with a shaft of the motor(17), having sides displaying state guide sentences.
Patent KR-20040078358-A (KR)
Inventor: JANG CHAE GYU
IPC: H01L23/544
Filed: 2003-03-04
Abstract: PURPOSE: A test vehicle BGA package is provided to form correctly a test vehicle for high-density and high-speed device by mounting a sealing post or a sealing cap. CONSTITUTION: A PCB(20) includes a bond finger. An adhesive(27) is coated on an edge part of the PCB. A sealing post(24) is adhered on the edge part of the PCB by the adhesive. A test semiconductor chip(30) having a plurality of bonding pads is adhered on the PCB. A plurality of metal wires(28) are used for connecting the bonding pads of the semiconductor chip to the bond fingers of the PCB. A sealing cap(25) is adhered on the sealing post in order to seal up the semiconductor chip. A plurality of solder balls(32) are formed on a bottom of the PCB.
Patent KR-20030078806-A (KR)
Inventor: JUNG DAE GYUN
IPC: C07K14/08
Filed: 2003-03-31
Abstract: PURPOSE: A vaccine composition for the treatment and prevention of infectious pancreatic necrosis viruses(IPNV) is provided, thereby effectively treating and preventing the IPNV infection causing fish death. CONSTITUTION: An infectious pancreatic necrosis viruses(IPNV) VP2 structure protein has the amino acid sequence represented by SEQ ID NO: 24. An eukaryote expression vector contains the total or a portion of a gene encoding the infectious pancreatic necrosis viruses(IPNV) VP2 or VP3 structure protein. An eukaryote expression vector contains the total or a portion of the infectious pancreatic necrosis viruses(IPNV) VP2 gene and VP3 gene. A vaccine composition for the treatment and prevention of infectious pancreatic necrosis viruses(IPNV) comprises the expression vectors containing the gene of infectious pancreatic necrosis viruses(IPNV) VP2 gene or VP3 gene or both genes.
Patent KR-20030081052-A (KR)
Title: 반도체 장치 제조 방법
IPC: H01L21/027
Filed: 2003-04-07
Abstract: 저유전율 MSQ를 포함하는 막이 층간 절연막으로 사용되고, 마스크로서 레지스트를 사용하는 것에 의해 MSQ에 개구가 마련되며, 레지스트는 MSQ가 노출된 상태에서 애싱된다. 이 경우에 있어서의 애싱 조건은 저온(-20℃ 내지 60℃) 및 저압(5 내지 200mTorr)으로 설정되고, RF 공급은 바이어스 전력과 전원 전력의 순으로 수행된다. 이렇게 하여, MSQ의 저유전율 특성을 결정짓는 CH 3 기가 막 내에 잔존할 수 있게 된다.
Patent KR-20040088645-A (KR)
Inventor: KIM IN SU
IPC: F02M25/07
Filed: 2003-04-10
Abstract: PURPOSE: A liner EGR(Exhaust Gas Recirculation) valve assembly for a vehicle is provided to secure the durability and quality safety of the EGR valve and smooth recirculation of the exhaust gas, to improve performance of an exhaust gas recirculation device, and to prevent environmental pollution by a discharge device for discharging naturally residual matters of liquefied exhaust gas flowing into a secondary pole piece. CONSTITUTION: A liner EGR valve assembly for a vehicle is composed of a solenoid(32) having a connector formed at the upper end to supply power required for operation and a mounting base combined with the lower side of the solenoid and formed with intake and exhaust ports. The solenoid comprises a bobbin for winding a solenoid coil and embedding in a housing(34); primary and secondary pole pieces combined with an inside of the bobbin to function as a guide for preventing leakage of a magnetic field and securing smooth operation of an armature; the armature embedded in the primary and secondary pole pieces and lifted up and down by magnetization generated by the supply of power to the solenoid coil; a valve pintle connected to the lower end of the armature and formed with a valve for opening and closing an intake port arranged at the mounting base; a dust seal interposed between the mounting base and the valve pintle to cut off foreign materials from flowing into the solenoid valve; and a plurality of discharge slots(45,46) arranged radially at a projected annular sill(42) protruded integrally with the lower inner diameter of the secondary pole piece and connected adjacently to the dust seal on the mounting base.
Patent KR-20040089300-A (KR)
Inventor: CHOI GYEONG HO
IPC: H04B10/29
Filed: 2003-04-11
Abstract: PURPOSE: A recovering device while switching an optical switch of a digital optical repeater for mobile communication and a method thereof are provided to connect an optical path of an upper node for an optical signal to a lower node and a main branch optical module, respectively, when switching an optical switch. CONSTITUTION: The first optical switch(90) has two input ports(IN1,IN2) and two output ports(OUT1,OUT2), and wherein the first input port(IN1) is connected to the second directional optical element(80) and the second input port(IN2) is connected to a sub branch optical module(50), then the first output port(OUT1) is connected to a lower node(70) and the second output port(OUT2) is connected to the second optical switch(110). A WDM filter(100) filters optical signals transmitted from the second directional optical element(80), and transmits an optical signal only corresponding to a 1570nm optical wavelength to the second optical switch(110). The second optical switch(110) has two input ports(IN1,IN2) and one output port(OUT1), and wherein the first input port(IN1) is connected to the second output port(OUT2) and the second input port(IN2) is connected to the WDM filter(100), then the output port(OUT1) is connected to a main branch optical module(40).