baber/WOPTO huggingface dataset:
Patent KR-20000014709-A (KR)
Title: Wide area reservation method of pager using voice mail system
Inventor: PARK LE SOO
IPC: H04W84/02
Filed: 1998-08-24
Abstract: PURPOSE: A method is provided for reserving a wide area of paging system, particularly for reserving a plurality of wide area and wide area time beforehand using VMS(Voice Mail System) without setting up the wide area of pager user when travelling other wide area. CONSTITUTION: A method is provided which comprises; selecting a wide area and wide area service time by a pager user and reserving those area and time in a VMS when the user gets access to the VMS; requesting wide area registration by transmitting signal which comprises wide area registration information to the paging system when it comes to the due service time set by pager user; registering the wide area requested for registration to the corresponding area of database which comprises pager user's information; doing a service in the registered wide area when there is a call from the registered pager user.
Patent KR-20000014744-A (KR)
Title: Manufacturing method of healthy food using solid cultured material of mushroom koji
Inventor: LEE JAE SUNG
IPC: A23L1/30
Filed: 1998-08-21
Abstract: PURPOSE: A manufacturing method of healthy food using solid culture of mushroom koji is provided to expect the effect of various kinds of physical active substances included in mushroom koji or the immunoproliferation and to easily take it as a diet or in a general family by easily providing the products. CONSTITUTION: The manufacturing method of auxiliary health food comprises the steps of: sieving the powder with a mesh sieve by powdering brown rice, polished rice, glutinous rice, milled barley, coix and sapwood of the solid cultures which is cultivated by mushroom koji with a mixer; cooking hot cereal at a low heat by mixing the brown rice powder, sapwood, whole milk powder and cornstarch with hot water at the ratio of 25, 5, 5, 10 and 250g; deaerating by heating the hot cereal at a temperature of 80-90°C for 5 minutes after filling a pack, a bottle or a can with it; and cooling the hot cereal after packing it by completely sealing in a sterile chamber with nitrogen gas.
Patent KR-19990071382-A (KR)
Title: 물체를 최소한 서로 다른 두 위치 사이로 이송하는 장치
IPC: B65G47/90
Filed: 1998-08-26
Abstract: 본 발명은 그리퍼 구성부를 물체에 근접시켜서 그립 구성부가 물체를 잡도록 하는 그리퍼를 사용하여 물체를 최소한 서로 다른 두 위치 사이로 이송하는 장치에 있어서, 그리퍼를 근접시킬 때 물체의 변형 또는 파괴를 방지하는 것을 목적으로 한 이송장치에 관한 것으로, 이 경우 강한 힘으로 잡아도 입자의 발생을 최소화 하여야 한다. 이송장치물체를 잡는 시점에서 계속되는 근접 경로를 조사하고 그리핑 과정의 시작을 결정하도록 근접 시의 이들의 간격과 물체를 파악하기 위하여 그리퍼에 센서를 설치한다. 
     본 발명의 장치는 물체의 이송, 특히 집적회로 제조공정에서 웨이퍼의 이송 컨테이너와 같은 물체를 이송하는 역할을 한다.
Patent KR-20000019946-A (KR)
Title: Semiconductor device and manufacturing method thereof
Inventor: LEE GI YOUNG
IPC: H01L23/62
Filed: 1998-09-16
Abstract: PURPOSE: A semiconductor device and manufacturing method thereof are provided to prevent the trap phenomenon of prescribed plasma charge within a gate insulation film to prevent the degradation of it and enhance the operation performance because the positive and negative components of the plasma charge generated in forming wiring lines. CONSTITUTION: A semiconductor device comprises a semiconductor substrate(100) having first and second conductive wells(102,104), gate wiring lines(110), source/drain areas(114), a first junction diode(118) of second conductive type, a second junction diode(120) of first conductive type, a first layer insulation film(122), plural conductive plugs(124), first metal lines(126a), and a second layer insulation film(128).
Patent KR-20000024818-A (KR)
Title: Method for reproducing audio signal of optical disk player
Inventor: SEO WON HO
IPC: G11B7/00
Filed: 1998-10-02
Abstract: PURPOSE: A method for reproducing the audio signal of optical disk player is provided to manage the audio data of a lot of time as a slight buffer RAM with the efficient management of buffer by increasing the speed of detection and buffering. CONSTITUTION: A reproduction speed setting step(S1) sets the speed according to the outer and inner circumference of a disk. A search target judging step(S2) judges the completion of searching for the target sector. A buffering operation step(S3) stores information searched in the target sector. A first buffering step(S4) judges whether the amount of buffered data is more than the preset amount. An audio reproduction operation step(S5) is converted into the mode to reproduce the audio data. An audio reproduction synchronous judging step(S6) judges a generation of the interrupt of buffer synchronous frequency. An audio reproduction and buffer reduction step(S7) reproduces the buffer data and reduce the quantity. A second buffering judging step(S8) judges whether the amount of buffered data is less than the preset amount. A buffer full input judging step(S9) judges whether the amount of buffer is full. A second buffering operation step(S10) proceeds buffering operation as much as reduced. An inner circumference direction track jumping step(S11) proceeds the searching operation of audio and returns to the second buffering judging step.
Patent KR-19990037123-A (KR)
Title: 진동형 압축기
IPC: H02K1/12
Filed: 1998-10-15
Abstract: 단단히 밀폐된 케이싱(1)은 냉각제를 저장하기 위한 내측공간(1a)을 가진다. 블록(6)은 이 케이싱내에 수용된다. 모터(3)는 고정자(3a)와 무버(3b)를 포함한다. 피스톤(5)은 모터의 무버(3b)에 연결된다. 가동요소(12)는 모터의 무버(3b)와 피스톤(5)을 포함한다. 정지요소(13)는 모터의 고정자(3a)와 블록(6)을 포함한다. 탄성요소(8)는 가동요소(12)에 연결된 부분(8b)과 정지요소(13)에 연결된 다른 부분(8c)을 가진다. 실린더(4)는 블록(6)에 대해 축방향으로 변위가능하다. 변위장치(6)는 실린더(4)를 축방향으로 변위시킨다.
Patent KR-20000027680-A (KR)
Title: Method for manufacturing semiconductor devices
Inventor: LEE HAE JEONG
IPC: H01L21/28
Filed: 1998-10-29
Abstract: PURPOSE: A fabrication method of semiconductor is provided to simplify manufacturing process and increase a width of contact hole by using a spacer having different etching selectivity compared to an interlayer dielectric without additional etching process. CONSTITUTION: On a silicon substrate(30) having a cell and a peripheral regions(A,B), a gate oxide(32), a gate electrode(33), a SiON layer(34) and a protecting oxide(35) are sequentially formed. A nitride layer(36) is deposited on the resultant structure, and a nitride spacer(36A) is formed at both sides of the gate structure of the peripheral region(B). An interlayer dielectric(37) having contact holes formed on the cell and peripheral regions(A,B), respectively is formed on the resultant structure, wherein the interlayer dielectric(37) is made of BPSG having a high etching selectivity compared to the nitride spacer(36A). By using the BPSG(37), the nitride layer(36) exposed at bottom of the contact hole of the cell region is selectively removed.
Patent KR-20000031561-A (KR)
Title: Process for preparing label
Inventor: KIM KYU HWAN
IPC: C09J7/02
Filed: 1998-11-07
Abstract: PURPOSE: A label having a cubic effect and various color is prepared which prevents a separation of rubber layer and material by firmly bonding rubber layer and thermal adhesives. CONSTITUTION: A constant thickness of silicon rubber layer(13) is coated on the thermal resistance film(10) such as polyester. Small particle(14a) is arranged on the rubber layer(13) and the rubber layer(13) is cured. A thermal adhesive(14) is coated on the rubber layer, and adhered to a material(15), pressurized by a thermal press(16). The rubber layer(13) having a bead(12) on the material(15) is formed by peeling the film(10) and an aqueous adhesive layer(11) to give the label.
Patent KR-20000032086-A (KR)
Title: Structure of preventing ventilation of oil for closed rotary compressor
Inventor: KIM BONG HYEON
IPC: F04C2/00
Filed: 1998-11-12
Abstract: PURPOSE: A preventing structure of oil venting of a closed rotary compressor is provided to minimize the venting of oil by preventing the foaming of oil due to the flow of refrigerant gas vented from a compressor. CONSTITUTION: A rotational force of a rotor(3) composing an electromotor and rotating by the fed current is delivered to a compressor via a rotary shaft(4). The compressor is delivered with the rotational force of the electromotor, sucks the refrigerant gas and vents after compressing. The vented refrigerant gas flows to the upper part of a closed vessel(1) via the space between a stator(2) and the rotor and one between the stator and the closed vessel of the electromotor. Herein, a rotational flow of the refrigerant gas vented into the closed vessel by the centrifugal force by the rotation of the rotor is generated. If the oil filled in the bottom of the closed vessel is absorbed upward by the rotational flow, the oil is cur off by an oil separation plate(20) installed on the upper part of the compressor. So the mixing of the oil with the refrigerant gas is prevented. An oil recovery path(21) formed on the oil separation plate is formed in the opposite direction of the rotation of the rotor. Thereby the absorption by the centrifugal force according to the rotation of the rotor is cut off, and the oil foaming is prevented.
Patent KR-20000033216-A (KR)
Title: High sensitive differential eddy-current probe suitable for miniaturization
Inventor: KANG SHIN HYUK
IPC: G01R1/00
Filed: 1998-11-20
Abstract: PURPOSE: A high sensitive differential eddy-current probe suitable for miniaturization is provided to easily screen and enhance resolution. CONSTITUTION: A high sensitive differential eddy-current probe comprises the parts of: a drive coil(2) supplying static current from the outside to generate differential eddy current in a sample; a sense coil(#1(1a), #2(1b)) measuring the volume of the differential eddy current generated in the sample; a first sense coil(#1(1a)) around an upper ferrite(3a); a second coil(#2(1b)) around a sub-ferrite(3b); and a drive coil(2) around a spacer(4) made of a nonmagnetic nonconductor.
Patent KR-20000033248-A (KR)
Title: Method for producing decoration board using patterned wood
Inventor: KIM SANG SEOL
IPC: D21H27/30
Filed: 1998-11-20
Abstract: PURPOSE: A production method of decoration board using a patterned wood is provided to offer a decorative paper having the waterproofing, the heat resistance, the corrosion resistance, the scratch resistance, the chemical resistance, and the shock resistance. CONSTITUTION: A melamine resin is impregnated by dipping a transparent paper and a beige paper. The impregnated melamine resin is dried and they are layered to locate the transparent paper on a patterned paper and the beige paper on a rear face of patterned paper and then a rear paper on the rear face of beige paper. The layered decorative paper is molded in one body by using a steam press. The patterned paper is wood formed in a thin plate and a drying method of drying process is a natural drying method or a drying method of warm wind. A temperature of steam press is at 120-150°C and a pressure is 50-100kg/cm¬2.
Patent KR-20000034175-A (KR)
Title: Output signal correction device
Inventor: KIM BYONG IL
IPC: G09G5/00
Filed: 1998-11-27
Abstract: PURPOSE: An output signal correction device is provided for reducing a signal error part outputted from a circuit block, which is installed the output signal correction device to be electrically connected to an inputting part and an outputting part of the circuit block formed on the output circuit plate. CONSTITUTION: An output signal correction device has an input stage of the circuit block for inputting a signal electrically connected to an inputting part and an output tion part of a circuit block. A signal synchronous coincidence part coincides synchronization of output signal from outputting circuit block. A storage part of the input signal temporarily stores the input signal transmitted from the input stage of circuit block for the time to output the input signal from a starting point of the input to the circuit block, which is electrically connected to the inputting part of the circuit block and the signal synchronous coincidence. An error correction part corrects the error generating part of the output signal for matching with the input signal when generating the output signal error after comparing the output signal from the signal synchronous coincidence and the level of the transmitted input signal.
Patent KR-19990078507-A (KR)
Title: 건강보조용 인체자극물과 그 제조방법
Filed: 1998-12-10
Abstract: 본 발명은 자성(磁性), 바이오 및 황토, 키토산, 또는 생약재등의 약성물질을 이용하여 형성된 결정체로 하여금 인체를 자극함으로서 유익한 약성에 의해 성인병의 예방과 치료 및 건강보조용으로 이용하게 되는 건강보조용 인체자극물과 그 제조방법에 관한 것이다. 민간요법으로 내려오는 물질들을 몸에 지니는 각종 건강보조물들이 알려져 산업화되고 있슴과 같이 의학계에서도 그 효능이 있다고 판단함에 따라 많은 사용으로 인한 효과의 인정을 받고 있는 실정이다. 
     상기 자석분과 동분말 또는 세라믹과 접착수단의 PVC를 일정비율로 혼합하여 내의등에 돗트형상으로 부착하여 돗트에서 발산되는 자력 또는 바이오에 의한 치료효과를 얻도록 하고 있으나, 분말 고형체는 부착작업이 어렵고 쉽게 파열되는 문제점과 특히 소망하는 발산량을 높일수 없는 단점, 성질이 쉽게 소실되는 폐단등의 문제점을 가지고 있다. 본 발명은 효능을 높이기 위한 자력구성을 양면다극, 양면단극을 임으로 조절가능하고 이방성, 등방식으로 나누워질수 있으며 산화철을 소망의 크기로 성형구성함과 이에 약성을 가지는 황토, 세라믹, 포죠란, 키토산, 생약등을 필요에 따라 선택 PVC와 혼합시킴으로서 약리효과와 접착수단을 이루고 이러한 접착수단에 의한 몰드로 성형된 인체자극물을 직물지등에 접착할수 있도록 한 특징을 가진 인체자극물을 제공함을 목적으로 한 것이다.
Patent KR-20000042563-A (KR)
Title: Apparatus for deciding 3 levels of equalizer of optical disc player
Inventor: JEONG MYEONG HWAN
IPC: G11B20/00
Filed: 1998-12-26
Abstract: PURPOSE: An apparatus for deciding 3 levels of an equalizer of an optical disc player is provided to reduce processing time and size of hardware by deciding three levels through the particular number of bits of a bit column inputted from an equalizer of an optical disc player. CONSTITUTION: An inputted 8-bit data uses a value in a range of 32-64 as data and the upper 3 bits have 101 and 110. The value is outputted as 0 through the operation of an exclusive OR gate(210). The 8-bit data has the value of -32 to 29 as data and its upper 3 bits have 111 and 000 to output 1 through the exclusive OR gate. In addition, the upper 3 bits have 110 if the 8-bit data selects a range of -64 to -33 as data. Thus, 0 is outputted by the exclusive OR gate and three levels are decided by the process.
Patent KR-20000044079-A (KR)
Title: Method for controlling camera of video conference system
Inventor: LEE CHANG GWON
IPC: H04N5/225
Filed: 1998-12-30
Abstract: PURPOSE: A method for controlling a camera of a video conference system is provided to control a direction of a camera toward the parties concerned of a conference. CONSTITUTION: A method for controlling a camera of a video conference system comprises the steps of: measuring audio signals input from each microphone and setting up a location of a camera according to the measured locations of the microphones; rotating the location of the camera toward a location of the microphone generating the audio signal and performing a zooming-in function the camera if the audio signal generated from one microphone; fixing the location of the camera at a center point and performing a zooming-out function of the camera if the audio signals are generated from two more microphones; and performing a video communication by controlling the rotation operation and the zooming function of the camera if the audio signals are generated from another microphone.
Patent KR-20000045070-A (KR)
Title: Ink jet printer head by using piezo effect and manufacturing method thereof
Inventor: KIM SUNG JIN
IPC: B41J2/045
Filed: 1998-12-30
Abstract: PURPOSE: A method for manufacturing an ink jet printer head by using piezo effect is provided to simplify the procedure by forming a pressure chamber and a nozzle simultaneously by etching and reduce the thickness of the nozzle. CONSTITUTION: A method for manufacturing an ink jet printer head by using piezo effect includes the steps of forming a mask pattern for forming a nozzle at one side on a bulk silicon substrate, doping B on the bulk silicon substrate formed with the mask pattern, forming SiO2 layer on the other side of the bulk silicon substrate, forming a predetermined pattern on the SiO2 layer for forming an ink injecting channel and etching the bulk silicon substrate corresponding to a partitioning wall part by using the SiO2 layer as a mask, removing the SiO2 pattern mask, forming SiO2 layer on the etching part and the other side of the bulk silicon from which the SiO2 pattern mask is removed, removing the SiO2 layer from a portion to be formed with a pressure chamber and a common ink channel by patterning the SiO2 layer, forming the pressure chamber, common ink channel and the nozzle simultaneously by etching the bulk silicon substrate by using the patterned SiO2 layer as a mask, forming an SiO2 film on inner walls of the pressure chamber and the common ink channel by coating SiO2 for preventing chemical reaction between the ink and Si, attaching a Si vibration plate on a surface facing to the nozzle plate, and forming a piezo structure on the Si vibration plate.
Patent KR-20000046468-A (KR)
Title: Portable information processing device with mp3 audio function
Inventor: HWANG GYO JONG
IPC: G06F9/00
Filed: 1998-12-31
Abstract: PURPOSE: A portable information processing device with a MP3 audio function is provided to add a playback function of MP3 data with a private information processing functions. CONSTITUTION: A portable information processing device with a MP3 audio function includes an operating system, a ROM that stores all sorts of programs, data input/output devices, a LCD controller and a LCD panel used in displaying image data, an input terminal which is used in inputting encoded MP-3 data, a MP3 decoder which is used in decoding digital music signals by decoding music information included in MP3 data, a D/A converter that changes the digital music signals output from the MP3 decode, into analogue music signals, an output terminal that outputs analogue music signals output in the D/A converter to the outside.
Patent KR-19990063979-A (KR)
Title: 엔진 관리장치용 진단장치
IPC: F02D41/22
Filed: 1996-10-03
Abstract: 엔진 관리장치 이외의 장치에도 사용되기 위한 진단장치(10)가 진단장치에 의해 평가되는 부품 또는 부속장치의 작동 상태를 표시하는 진단 장애 코드(DTC)를 발생하기 위하여 제공되어 있다.  진단 장치는 부품 또는 부속장치와 관련된 DTC 그룹 또는 각각의 DTC를 위한 진단기능 모듈(DF 모듈; 20, 20', 20'')을 포함하고 있다.  DF 모듈은 특정한 DF 모듈의 DTC와 관련된 부품 또는 부속장치의 작동 상태를 평가하도록 평가 루틴을 실행하기 위한 수단(22)을 포함하고 있으며, 진단장치는 어느 DF 모듈(20, 20', 20'')이 특정 시간에 평가 루틴을 실행시킬 수 있는가를 결정하기 위한 진단기능 스케줄러(DF 스케줄러, 30)를 포함하고 있다.  DF 모듈 각각은 평가되는 부품 또는 부속장치의 작동 상태에 따라서 평가 루틴이 실행되는 각각의 시간에 발생되는 순위값을 생성하기 위한 수단(22)과, 다수의 평가 루틴에 걸쳐 얻어진 순위값의 통계적 결과를 처리하여 저장하기 위한 수단(23)과, 무결함 평가신호 또는 결함 평가신호의 형태로 평가신호를 생성하도록 통계적 결과를 평가하기 위한 수단(22)과, 그리고 신호에 변화가 일어날 때 DF 스케줄러(30)로 평가신호를 전송하기 위한 수단(24)을 포함하고 있다.
Patent KR-19990067287-A (KR)
Title: 2차 전지전극기체용 심체, 심체 제조방법, 2차 전지전극기체,전극기체 제조방법, 및 이들을 사용한전극과 전지
IPC: C25D5/12
Filed: 1996-11-01
Abstract: 본 발명은 2 차 전지전극용 기판이 원통형의 전지내에 감겨서 고정될 때에 소결 다공성 금속이 그라운드 금속 플레이트에서 박리되지 않도록 그라운드 금속 플레이트에 대한 소결 다공성 금속의 밀착성이 양호한 2 차 전지전극용 기판을 제공하는 데 있다. 
     이를 위하여,  그라운드 플레이트보다 융점이 낮은 금속층이 그라운드 플레이트의 적어도 일측상에 형성되고,  금속층상에 금속층보다 높은 융점을 갖는 분말금속층을 형성하여 금속층의 융점 이상과 그라운드 플레이트와 분말금속 의 융점 이하의 온도에서 분말금속을 소결하여 다공성층이 형성된다.    또,  그라운드 플레이트의 적어도 일측이 붕소화되고,  붕소화층상에 붕소로 공정합금된 분말금속층을 형성하고,  공정합금의 융점 이상과 그라운드 플레이트와 분말공정합금의 융점 이상의 온도에서 분말공정합금을 소결하여 다공성층이 형성된다.
Patent KR-19990067685-A (KR)
IPC: C07D491/04
Filed: 1996-11-04
Abstract: Cyclic and heterocyclic N-substituted alpha-iminohydroxamic and -carboxylic acidsCompounds of the formula Iare suitable for preparing pharmaceuticals for the treatment of disorders in the course of which is involved an increased activity of matrix-degrading metalloproteinases.
Patent KR-19990071633-A (KR)
Title: 밸브및밸브의제조방법
IPC: F02M61/10
Filed: 1997-08-26
Abstract: 밸브로드의 행정의 조절이 홀 몸체의 변형에 의해 수행되는 연소기관용 연료주입밸브는 이미 알려져 있다. 그때에는 홀 몸체 및 밸브시이트 몸체에 있는 용접 시임(seam)이 손상될 수 있다. 
     새로운 밸브에 있어서는 밸브로드(5)의 행정의 조절이 소성변형에 의해 시이트 지지체(1)의 외주에 있어 협착부(30)의 형태로 행해진다. 
     본 발명에 의한 밸브 및 밸브의 제조방법은 혼합물 농축 외부 점화형 연소기관용 연료주입장치의 연료주입밸브에 특히 적합하다.
Patent KR-19990071700-A (KR)
IPC: B28B1/00
Filed: 1996-11-18
Abstract: A process is provided that permits the rapid quenching of molten ceramics by passing a flow of the molten ceramic into a turbulent fluid flow such that the flow is broken up into particles which then solidify as they pass into and through a cyclone and are finally separated from the fluid flow and collected as dry particulate ceramic materials.
Patent KR-19990082421-A (KR)
Title: 음성 인터넷 전송 시스템
IPC: H04M7/12
Filed: 1997-02-05
Abstract: 대화의 어느 한 쪽에서 컴퓨터의 이용 없이, 그리고 대화가 있는 사람들 사이에서 거리에 관계없이 긴 거리 전화 요금 일으킴 없이, 사람이 인터넷(16) (Internet)을 통하여 대화를 가지게 하는 음성 인터넷 전송 시스템(voice Internet transmission system).  선호되는 실시예에서, 인터넷(16)(Internet)에 연결될 수 있는, 그리고 장치 사이에서 디지털화되고 압축되고 암호화된 대화를 포함하는 인터넷(Internet) 용(用)으로 된 데이터를 전송하는 듀플렉스 모드나 심플렉스 모드 등으로 연결될 수 있는 두 개의 비(非)-인터넷 가능 장치(non-Internet capable device)를 장치는 포함한다.  다시 말하면, 사람은 보통의 전화(30)를 이용하고, 사람사이에서 거리에 관계없이 긴 거리 전화 요금을 일으킴 없이, 또 다른 사람과 대화한다.  특별한 전화는 요구되지 않고, 특별한 소프트웨어를 작동하는 컴퓨터도 아니다.  상기를 가능하게 하는 장치는 인터넷 접근 노드(Internet accsess node) 또는 음성-엔진(32, 34) 등으로 이루어진 시스템이다.  상기 지역 인터넷 음성-엔진(32, 34)은 디지털화되고 압축되고 암호화된 듀플렉스 또는 심플렉스 인터넷 음성/사운드 통신 장치 서비스를 공급한다.
Patent KR-20000065025-A (KR)
IPC: A61K31/565
Filed: 1997-04-28
Abstract: A pharmaceutical composition comprising: a hydrophobic drug, a digestible oil selected from triglycerides or propylene glycol esters of medium chain length (C8-C12) and/or long chain length (C13-C22) fatty acids; and propylene glycol monolaurate, a lipophilic surfactant which comprises a glyceride of a C5 to C10 fatty acid and a hydrophilic surfactant which is a polyoxyethylene hydrogenated castor oil, wherein the digestible oil is present in an amount on the range from 3.0 to 12.0 % by weight of the composition and the weight ratio of hydrophilic surfactant to lipophilic surfactant is in the range 1:1.5 to 1:2.5. Suitable hydrophobic drugs includes sex hormones such as progesterone, oestradiol and testosterone.
Patent KR-20000051571-A (KR)
Inventor: YOO KI WON
IPC: G02B6/38
Filed: 1999-01-23
Abstract: PURPOSE: An optical switch is provided to produce the desired signals at the output ports, and minimize an optical loss of the optical fiber. CONSTITUTION: An optical switch comprises many optical fibers(51,52,53,54), two fiber-optic polarizers(61,71), two Faraday optical fibers(63,73), four polarization fibers(62,64,72,74), and a polarized light separating coupler(80). The input signal from each input ports is polarized by each fiber-optic polarizer, and the polarized signal is passed through each polarization fiber. Each Faraday optical fiber changes the polarization angle of signal by using direction of the magnetic field. Each polarization maintaining fiber produces signal rotated by predetermined angle. The polarized light separating coupler receives the signals generated from the polarization fibers, and each signal is simultaneously directed to a desired output port based on the polarization angle. An optical switch comprised of optical fibers provides easy alignment of the optical path, and reduces the optical loss.
Patent KR-20000055309-A (KR)
Inventor: YU BYUNG UK
IPC: H04B1/38
Filed: 1999-02-05
Abstract: PURPOSE: A method for controlling cellular phones with a hands-free speaker is provided to selectively output received signals to a receiver or the speaker, and switch an operating mode of cellular phones to a normal or hands-free calling modes with a key input, by building the hands-free speaker in the cellular phones. CONSTITUTION: A method for controlling cellular phones with a hands-free speaker comprises the steps of: detecting a switching state of a mode switching key which switches an operating mode of cellular phones, when power is supplied; detecting a present calling mode after switching the mode switching key; displaying that the operating mode is a hands-free mode, after switching a signal output path of codecs, decoding signals received via an antenna, into a speaker, if the mode is a normal operating mode; displaying that the operating mode is a normal calling mode, after switching the signal output path into a receiver, if the mode is a hands-free mode; and amplifying received voice signals which is output to the speaker under the hands-free mode.