baber/WOPTO huggingface dataset:
Patent KR-20030047750-A (KR)
Title: silicon semiconductor wafer, and process for producing a multiplicity of semiconductor wafres
Inventor: WENSKI GUIDO
IPC: B24B37/04
Filed: 2002-12-04
Abstract: PURPOSE: A silicon semiconductor wafer is provided to fabricate a plurality of silicon semiconductor wafers between lower and upper polishing plates at low cost by performing a simultaneous double side polishing process using polishing cloth. CONSTITUTION: The silicon semiconductor wafer has a diameter greater than or equal to 200 millimeter, a polished front surface, a polished back surface and a maximum local flatness value SFQRm-1 less than or equal to 0.13 micrometer, based on a surface grid of segments with a size of 26 millimeterx8 millimeter on the front surface, wherein the maximum local height deviation P/V(10x10)m-1 of the front surface from an ideal plane is less than or equal to 70 nanometer, based on sliding sub-regions with dimensions of 10 millimeterx10 millimeter. A multiplicity of silicon semiconductor wafers are produced by simultaneous double-side polishing between one lower polishing plate and one upper polishing plate in each case. The lower and upper polishing plates which rotate are parallel to one another. The polishing cloth is adhesively bonded to the lower and upper polishing plates while a polishing agent, which contains abrasives or colloids, is being supplied, with at least 2 micrometer of silicon being removed. A predetermined proportion of the semiconductor wafers is at least partially polished using a lower polishing pressure, and a further proportion of the semiconductor wafers is polished using a higher polishing pressure.
Patent KR-20040050798-A (KR)
Title: Method for fabricating photoresist pattern
Inventor: KO CHA WON
IPC: H01L21/027
Filed: 2002-12-09
Abstract: PURPOSE: A method for manufacturing a photoresist pattern is provided to be capable of carrying out a curing process at a low temperature for a short time. CONSTITUTION: A polyimide layer is coated on a wafer(1). The polyimide layer contains a predetermined agent. A soft baking process is carried out on the resultant structure at the temperature of 90 °C for 90 seconds. A photoresist pattern(3a) is formed by sequentially carrying out an exposing and developing process. A curing process is carried out on the resultant structure at the temperature of 150-250 °C for 5 minutes. The polyimide layer contains the predetermined agent of 0.1-5 wt%. The polyimide layer has a thickness of 2-15 μm.
Patent KR-20040050516-A (KR)
Title: Method for forming metal wiring using dual damascene process
Inventor: CHOI IL SANG
IPC: H01L21/28
Filed: 2002-12-10
Abstract: PURPOSE: A method for forming a metal line using a dual damascene process is provided to simplify the process by sequentially depositing a via oxide layer, a nitride layer for an etch stop layer, an oxide layer for an upper metal line in a chamber by in-situ. CONSTITUTION: An interlayer dielectric(2) with a lower metal line(3) is formed on a semiconductor substrate(1). The first oxide layer(5), a nitride layer(6), and the second oxide layer(7) are sequentially formed on the resultant structure by in-situ. A via hole is formed for exposing the lower metal line by selectively etching the resultant structure. A trench is formed by selectively etching the second oxide layer using the nitride layer as an etch stop layer. An upper metal line(8) is formed by filling the via hole and trench using a metal layer.
Patent KR-20040051296-A (KR)
Title: Method for fabrication of semiconductor device using tungsten process
Inventor: KIM YU CHANG
IPC: H01L21/28
Filed: 2002-12-12
Abstract: PURPOSE: A method for manufacturing a semiconductor device using a tungsten process is provided to prevent the negative slope of a tungsten pattern due to an oxide layer by using chlorine based gas. CONSTITUTION: An interlayer dielectric(34) made of an oxide layer is formed on a semiconductor substrate(31). A tungsten layer is formed on the interlayer dielectric. A hard mask(38) made of a nitride layer is formed on the tungsten layer. A tungsten pattern(37a) is formed by selectively etching the tungsten layer using the hard mask as an etching mask. At this time, the etching gas for the tungsten etching process contains chlorine gas. The etching gas further contains fluorine gas and inert gas. The flow rate of the chlorine gas is 20-30 sccm.
Patent KR-20030055119-A (KR)
IPC: B02C17/18
Filed: 2002-12-21
Abstract: 본 발명은 교반기 밀(mill)에 관한 것으로, 이러한 교반기 밀은 분쇄용기(1)와 회전가능하게 구동될 수 있고 상기 용기에 내장된 교반기(12)를 포함한다. 게다가 분쇄물 공급 펌프(26)가 장착된 분쇄물 공급 파이프(24)와 분쇄물 배출펌프(39)가 장착된 분쇄물 배출 파이프(27)가 제공되며, 최소한 상기 펌프들(26,39) 중 어느 하나는 조절 가능하다.
Patent KR-20040059532-A (KR)
Title: CMOS image sensor with protecting heavy metal ions for reducing dark current
Inventor: LEE JU IL
IPC: H01L27/14
Filed: 2002-12-27
Abstract: PURPOSE: A CMOS image sensor is provided to improve dark current by blocking heavy metal ions from a metal line using a nitride layer. CONSTITUTION: A substrate(201) is provided with a desired structure including a light receiving device. An interlayer dielectric(210) is formed on the resultant structure. A metal line(212) is formed on the interlayer dielectric. A nitride layer(211) is formed between the metal line and the interlayer dielectric, thereby blocking the flow of heavy metal ions from the metal line.
Patent KR-20040059417-A (KR)
Title: Charcoal forming products by using the adhesive gluing agent and the charcoal, and its manufacturing method
Inventor: CHOE HYEON HO
IPC: B68G1/00
Filed: 2002-12-28
Abstract: PURPOSE: A charcoal molding using an adhesive and charcoal powders and a preparation method thereof are provided to prevent the breakage of charcoal in use and not to generate the charcoal powders. CONSTITUTION: The preparation method of the charcoal molding comprises the steps of: mixing 130 to 150 g of vinyl acetate resin, 130 to 150 g of vegetable starch, 130 to 150 g of a liquid concentrate extracted from aquatic plants and 550 to 650 g of water and stirring to obtain the adhesive; mixing 70 to 90 g of an adhesive, 15 to 25 g of a vegetable pulp, 900 to 1100 g of the charcoal powders and 180 to 220 g of a water to obtain a mixture; putting the mixture into a molding frame of a press molding machine and then pressing.
Patent KR-20040061611-A (KR)
Inventor: LEE CHANG JUN
IPC: H01L21/027
Filed: 2002-12-31
Abstract: PURPOSE: A mask having alignment key for length and breadth direction exposure is provided to decrease the number of exposure processes performed on a substrate by additionally installing an align key for aligning a mask and the substrate in a direction vertical to the align key formed in a conventional mask. CONSTITUTION: A mask body(210) is prepared. At least one pattern region(220) is formed in the mask body. The first mask pattern key(270) is formed between a pair of confronting circumferential sides of each pattern region and the mask body. The second mask pattern key(280) is formed between a pair of different confronting circumferential sides and the mask body.
Patent KR-20020033725-A (KR)
IPC: A61P9/00
Filed: 2000-07-06
Abstract: The present invention is directed to compositions that inhibit the nonenzymatic glycation of albumin,, as well as methods of using compounds that inhibit albumin glycation for the treatment of glycation-related pathologies.
Patent KR-20020034172-A (KR)
IPC: B32B7/12
Filed: 1999-11-30
Abstract: 본 발명은 2개 이상의 층(12,14) 및 불투명하거나, 착색되거나, 또는 반사성이 있는 이들 층(12,14) 사이의 광중합성 접착제 조성물(16)을 포함하는 구조물을 적층시키는 방법을 제공한다. 상기 층들(12,14) 중 하나 또는 양자 모두는 400 nm 이상 1200 nm 이하 범위의 파장 내에 있는 화학 방사선에 대하여 투과성이 있다. 상기 광중합성 접착제 조성물(26)은 방사선 투과성 층의 확인된 스펙트럼 영역에 있는 방사선을 흡수한다. 경화(28)는 확인된 스펙트럼 영역에 있는 방사선을 방사선 투과성 층을 통해 상기 광중합성 조성물 내로 조사하여 적층 구조물을 생성시킴으로써 수행한다. 집적 회로 기판 상에 있는 언더필된 플립 칩 어셈블리(10)는 상기 설명한 방법으로 제조할 수 있다. 광중합성 접착제 조성물(26)은 정렬된 칩(12) 및 회로 기판(14)의 한쪽 표면 또는 양쪽 표면에 직접 도포할 수 있거나, 또는 집적 회로판 기판(14) 상에 정렬된 칩(12)은, 최종적으로 경화(28)되는 광중합성 접착제 조성물(26)에 의해 모세관 작용으로 언더필할 수 있다. 또한, 데이터 저장 디스크는 본 발명의 방법에 의해 제조할 수 있다.
Patent KR-20020064354-A (KR)
IPC: B23B51/00
Filed: 2000-12-13
Abstract: 툴 팁과 툴 몸체의 조립체는 가공물과 접촉하는 제1끝단부 및 제2끝단부를 구비한 툴 팁을 포함하며, 상기 제2끝단부는 후퇴부 및 돌출부로 된 패터닝된 표면을 가지며, 적어도 하나의 관통구멍이 툴 팁을 통하여 상기 제2끝단부로부터 연장되어 있다. 툴 몸체는 툴 팁의 패터닝된 표면과 결합하기 위하여 툴 팁의 패터닝된 표면에 대응하는 패터닝된 표면을 갖는 제1끝단부, 및 상기 툴 팁의 적어도 하나의 관통구멍과 정렬시키기에 적합한 적어도 하나의 나사구멍을 갖는다. 나사가공된 끝단부 및 고정용 끝단부를 갖는 적어도 하나의 패스너가 제공되며, 상기 패스너는 상기 고정용 끝단부가 상기 적어도 하나의 관통구멍내의 표면과 맞닿도록 적어도 하나의 관통구멍을 통하여 연장되며, 상기 나사가공된 끝단부는 상기 나사구멍내의 나사와 결합된다. 적어도 하나의 패스너, 툴 팁의 패터닝된 표면 및 툴 몸체의 패터닝된 표면에 의하여 툴 팁 및 툴 몸체 사이에서 토크가 전달된다.
Patent KR-20020070496-A (KR)
IPC: G06Q30/00
Filed: 2001-11-16
Abstract: 시청자의 시간 윈도우된 시청 이력(time-windowed viewing history)에 기초하여 텔레비젼 프로그램 추천들을 생성하기 위한 방법 및 장치가 개시되어 있다. 시청 선호도들에서 변화들은 자동적으로 식별된다. 시청 이력 프로파일은  시청 이력 윈도우들의 시리즈로 유지된다. 각 개인의 윈도우의 길이 및 완전한 시청 이력 자체(즉, 보다 작은 시청 윈도우들의 수)의 전체 길이는 고정되거나 변화될 수 있다. 또한, 중요한 정보의 손실없이 시청자 프로파일로부터 삭제될 수 있는 중요하지 않거나 비재생인 특징들은 식별된다. 특징에 대한 대응하는 주파수 카운트가 미리 규정된 시간의 기간동안 최소 문턱값을 초과하는데 실패할 때, 특징은 시청자 프로파일로부터 삭제될 수 있다. 개시된 텔레비젼 프로그래밍 추천기(television programming recommender)는 생성된 텔레비젼 프로그램 추천들이 시청 선호도들에서의 변화들에 적응시킨다. 특징의 조건 확률(알려진 분류, 예를 들면 시청한 프로그램들의 분류에서 프로그램들이 특징을 가질 가능성)은 시간의 함수로 계산된다. 시청 선호도들에서 사이클의 또는 주기의 변화들에 대해, 개시된 텔레비젼 프로그래밍 추천기는 하나 또는 그 이상의 유사한 보다 이른 사이클들 또는 주기들을 더욱 정확히 반영하도록 속성의 조건 확률을 조정한다. 시청 선호도들에서 경향들 또는 영속적 변화들에 대해, 텔레비젼 프로그래밍 추천기는 경향(현재 시청 선호도들)을 가장 잘 반영할 것 같거나 또는 식별된 경향으로부터 값을 가장 잘 추정할 것 같은 시청 이력의 가장 최근 윈도우(들)를 이용하여 텔레비젼 프로그램 추천들을 생성한다.
Patent KR-20020097166-A (KR)
IPC: G01C19/5684
Filed: 2001-01-08
Abstract: An angular rate sensor device (10) such as a micro-machined vibrating structure gyroscope, comprises a resonator (16), drive means (18), sensing means (20) and associated electronic control means. The resonator (16), drive means (18), sensing means (20) and control means are fabricated from a layer of crystalline silicon (12) having a [100] principal crystal plane. In order to make the resonator (16) operate in this type of material without degrading its performance, the resonator (16) is arranged to be operated by the drive and sensing means (18, 20) under the control of the electronic control means with a vibration mode pair having modal parameters, such as Young's Modulus, matched to provide a consistent resonator response. In particular, the resonator (16) is arranged to be operated with a Sin 3theta/Cos 3theta (vibration mode pair providing degenerate carrier and response parameters.
Patent KR-20020079919-A (KR)
IPC: H01L29/739
Filed: 2001-02-15
Abstract: 제 1 전도율 유형의 기판 상에서 형성된 적어도 3개의 개별적인 트렌치 DMOS 트랜지스터 셀을 포함하는 트렌치 DMOS 트랜지스터 구조가 제공된다. 복수의 개별적인 DMOS 트랜지스터 셀은 주변 트랜지스터 셀 및 내부 트랜지스터 셀로 분리가능하다. 개별적인 트랜지스터 셀 각각은 기판 상에 위치한 바디 영역을 포함하는데, 상기 바디 영역은 제 2 전도율 유형을 갖는다. 적어도 하나의 트렌치는 바디 영역 및 기판을 통해 확장한다. 절연층은 트렌치의 경계를 정한다. 전도성 전극은 트렌치에 위치하는데, 상기 트렌치는 절연층 위에 놓여있다. 주변 트랜지스터 셀이 아닌 내부 트랜지스터 셀 각각은 트렌치에 인접한 바디 영역에서 제 1 전도율 유형의 소스 영역을 추가로 포함한다.
Patent KR-20030011784-A (KR)
Title: Skincare agents
IPC: C09K23/52
Filed: 2001-02-03
Abstract: Production of microcapsules with an average diameter of 0.1-5 mm comprises: (a) forming an oil-in-water emulsion from an oil and an aqueous formulation of active ingredients in the presence of an emulsifier; (b) mixing the emulsion with an aqueous solution of an anionic polymer; (c) contacting the mixture with an aqueous chitosan solution and (d) separating the microcapsules from the aqueous phase.
Patent KR-20030011330-A (KR)
IPC: H04L27/00
Filed: 2001-03-13
Abstract: 본 발명은 송신하기 전에 심볼을 변조하는 송신기에서 이용된 변조 방식을 모르는 상태에서 심볼을 변조하는 통신 시스템의 수신기에서 변조 심볼을 복조하는 방법에 관한 것이다.  본 발명은 변조 심볼을, 계층적 변조 콘스텔레이션의 군(family) 중 한 콘스텔레이션의 심볼로서 해석하는 단계와, 순방향 오류 수정(FEC) 기술을 이용하여 복조된 심볼을 디코딩하는 단계와, 가정한 변조 콘스텔레이션에 따라 심볼을 복조하는 단계로 구성된다.  마지막으로, 정확성 여부에 대해 디코딩된 심볼을 검사한다.  수신기는 복조된 심볼의 정확성을 검사하는 수단뿐만 아니라, 대응하는 해석 유닛, 복조기, FEC 디코더로 구성된다.
Patent KR-20040064922-A (KR)
Inventor: YANG MYEONG U
IPC: H01H13/02
Filed: 2003-01-11
Abstract: PURPOSE: A key switch is provided to reduce part numbers and an assembly process and improve an operating sensibility by reducing the distance between key pads. CONSTITUTION: A key switch comprises a substrate(42), a plurality of tact switches(41), a plurality of key pads(40), and a plate frame(44). The tact switches are mounted on the substrate by a key input unit. The key pads are installed at an operating panel in such a manner that the pads push the tact switches when moving in the down direction and are made of a rubber material. The key pads are integrally connected to each other. The plate frame is mounted between the substrate and the key pads for supporting a connecting unit between the key pads.
Patent KR-20040065904-A (KR)
Inventor: KIM MYEONG GI
IPC: B62D25/08
Filed: 2003-01-16
Abstract: PURPOSE: A lower frame-integrated structure of a carrier for a vehicle is provided to reduce the production cost by reducing the number of components needed for combining side frames and a lower frame and to prevent lowering of durability by combining the side frames and the lower frame by a simple combining method. CONSTITUTION: A lower frame-integrated structure of a carrier for a vehicle comprises a first mounting part(59) having a first mounting hole(59a) for mounting a cooling module; a second mounting part(62) having a second mounting hole(62a) of a shape corresponding to the first mounting hole; and a lower frame(60) supporting the lower side of the carrier and having a rib(64) to reinforce the rigidity. The first mounting part is formed to the bent lower end of a side frame(56) of the carrier. The second mounting part is over-molded while covering the first mounting part. The lower frame is formed in one body with the second mounting part.
Patent KR-20040072260-A (KR)
Inventor: KIM TAE YUN
IPC: G11C11/406
Filed: 2003-02-10
Abstract: PURPOSE: A self refresh apparatus and its method are provided to prevent an error of refresh rate by controlling an operation of a self refresh request signal selectively according to the type of PASR. CONSTITUTION: A command decoder(20) generates a corresponding command signal by decoding a command applied from the external. A refresh counter(30) outputs a refresh request signal by performing a counting appropriate for a refresh period, when a self refresh signal is enabled from the command decoder. A partial array self refresh decoder(40) decodes a preset address with an extended mode register set code according to a mode register set signal from the command decoder, and outputs a plurality of control signals to perform a partial array self refresh operation by assembling a corresponding address if the self refresh signal is enabled from the command decoder. A refresh control part(50) outputs a refresh operation signal to enable banks during the refresh operation and an internal operation signal to count an internal address. A row address strobe generation part(60,70,80,90) enables a bank selectively by outputting a row active signal. An internal address counter(100) generates an internal address when the internal operation signal is enabled. And a row address pre decoder(110) outputs an external address as a row address of a selected bank during a normal operation, and outputs the internal address as the row address during a refresh operation.
Patent KR-20040073143-A (KR)
Inventor: LEE HAN U
IPC: B29C51/04
Filed: 2003-02-13
Abstract: PURPOSE: A device for manufacturing a polyurethane rubber band is provided to improve the tensile strength and heat-resistance of the rubber band by stretching polyurethane film sheet at a high temperature. CONSTITUTION: A device for manufacturing a polyurethane rubber band is composed of a stretching/separating unit(A) for stretching and separating polyurethane film sheet, a coating/drying unit(B) for coating and drying the polyurethane film sheet, a band forming unit(C) for cutting the polyurethane film sheet into rubber bands, and a distributing/packing unit(D) for distributing and packing the rubber bands.
Patent KR-20040073884-A (KR)
Inventor: KIM HYEONG ROK
IPC: H04B7/26
Filed: 2003-02-15
Abstract: PURPOSE: A method for selecting a status PDU of a mobile communication system is provided to select an optimum status PDU to increase stability of an RLC protocol that operates in an acknowledge mode, thereby enhancing a rate of user data. CONSTITUTION: A system calculates a receiving error of a packet data PDU(S100). The system writes a bitmap SUFI(Super Field) status PDU by using the calculated error(S110). The system converts the bitmap SUFI status PDU into an RLIST SUFI status PDU(S120). The system compares a window size of the RLIST SUFI status PDU with a window size of the bitmap SUFI status PDU, and decides whether the RLIST SUFI status PDU is bigger(S130). If so, the system stops converting the bitmap SUFI status PDU into the RLIST SUFI status PDU(S150). The system transmits the bitmap SUFI status PDU, and completes the procedure(S160).
Patent KR-20040062857-A (KR)
Inventor: PARK HYOUNG JIN
IPC: B65D50/14
Filed: 2003-02-20
Abstract: PURPOSE: A bottle cork is provided to identify whether the bottle is opened by naked eye. CONSTITUTION: The bottle cork comprises: a lower body(20) having a lower hole(22) to pass liquid in the bottle at the bottom side and to be inserted into the neck of the bottle; a middle plate(30) having the same area of the lower body(20) and inserted into the upper side of the lower body(20), the middle plate(30) having a hole; and an upper body(40) for covering the middle plate(30) and to be jointed to the lower body(20), the upper body(40) having an upper hole at the upper side; a cork(50) for covering the upper body(40) to prevent the liquid from being leaked, the cork(50) having an insertion bar(52); a middle plate penetrating member(60) set to the insertion bar of the cork(50) and to pass the middle plate(30) by force selectively.
Patent KR-20030022241-A (KR)
Title: Tap holder
Inventor: CHOI HEE SUNG
IPC: B23Q3/00
Filed: 2003-02-20
Abstract: PURPOSE: A tap holder is provided to improve productivity and make efficient work of tap in a lathe, a milling machine or a drilling machine. CONSTITUTION: A tap holder is installed in a machine tool such as a lathe, a milling machine, a drilling machine, etc. The tap holder is installed by assembling a cap with a sleeve. The assembled key and sleeve is moved linearly by a key. Therefore, the tap is operated easily. A spring is installed to remove stress to the tap in reverse rotation.
Patent KR-20030077968-A (KR)
Title: 액상 화장료
IPC: A61K8/30
Filed: 2003-03-13
Abstract: 본 발명은 수용성 L-아스코르브산 유도체 존재하에서도 사용감이 우수한 액상 화장료를 제공한다. 
     본 발명은 이하의 성분 (a) 내지 (c), 
     (a) 특정 폴리옥시프로필렌디글리세릴, 
     (b) 수용성 L-아스코르브산 유도체 0.5 내지 5 중량％, 
     (c) 수산기를 3개 이상 갖는 다가 알코올을 필수 성분으로 함유하는 것을 특징으로 하는 액상 화장료에 관한 것이다.  또한 성분 (d) 에탄올을 함유하고, 성분 (a)와 성분 (b)의 함유 질량비가 1:1O 내지 1O:1인 액상 화장료에 관한 것이다.
Patent KR-20030078802-A (KR)
IPC: C12Q1/527
Filed: 2003-03-29
Abstract: 본 발명은 일군의 유전자 발현을 분석하여 결장직장암이 있는 것으로 추정되는 환자의 결장직장암의 존재 유무 또는 가능한 증상을 검사하는 방법에 관한 것이다.  마이크로어레이 등의 각종 매체에 제공된 유전자 발현 프로필은 물론 이 프로필을 포함하는 키트도 포함한다.
Patent KR-20040087758-A (KR)
Inventor: SHIN JAE BEOM
Filed: 2003-04-08
Abstract: PURPOSE: A method for a realty trading business through a realty information sharing system is provided to share information with employees of the same business by sharing the realty information of each region with nationwide realtors registered as a member, and allowing unspecified and many persons to view the registered information freely. CONSTITUTION: If the member inputs the realty information through the online, the realty information is stored in a database server by classifying the realty information into each region/trading sort/realty sort(S33). The summary information of the registered information is transmitted as a mail by extracting a mail address from entire member information stored in the database(S40). If a download request signal is received from the member, an information file is transmitted(S42). The member stores the downloaded information file and publishes the information to general customers through an external display device.
Patent KR-20040087480-A (KR)
Inventor: KIM MIN WOOK
IPC: G06F17/00
Filed: 2003-04-08
Abstract: PURPOSE: A digital content supplying and clearing method is provided to prevent the supply of illegal digital content files, and to make a user normally pay usage of digital content. CONSTITUTION: The method comprises several steps. A user accesses a main system(S10). The user subscribes for the main system as a member, and downloads a illegal copying prevention program(S20). The user selects one between a sale and a purchase of the digital content(S30). In a case of the sale of the digital content, the user gives a file name to the digital content to be sold, and stores the file at a user system(S40). In a case of the purchase of the digital content, the user selects a file name of the digital content among the file names offered by other user systems via the main system(S50). If the user selects the file name, the main system filters the file name, compares the file with pre-stored files, and checks whether the supply of the digital content is legal(S60). Then, the user downloads the file at the user system(S70). At this time, the illegal copying prevention program inserts a watermark into the downloaded file(S80). The user pays the digital content(S90). The payment is distributed to the content provider and the copy right owner(S100).
Patent KR-20040089884-A (KR)
Inventor: HAM CHANG SIK
IPC: H04B7/26
Filed: 2003-04-15
Abstract: PURPOSE: An apparatus for sensing a preamble signal of a mobile terminal is provided to enhance reliability of communication between a base station and a mobile terminal by compensating a different phase between the base station and the mobile terminal. CONSTITUTION: A hard decision unit(200), including the first hard decision unit(200-1) and the second hard decision unit(200-2), takes symbols of received I phase signal and Q phase signal. A register(201) stores filter coefficient values i and q and a reference preamble value. A preamble sensing unit(202) includes the first to fourth matched filters(202-1-202-4) for filtering outputs of the first and second decision units(200-1,200-2), the first adder(202-5) for adding outputs of the first and fourth matched filters(202-1,202-4), the second adder(202-6) for adding outputs of the second and third matched filters(202-2,202-3), the third adder(202-7) for adding outputs of the first and second adders(202-5,202-6), and a comparator(202-8) for comparing an output of the third adder(202-7) and the reference preamble value.
Patent KR-20040089980-A (KR)
Title: Light fixture cover capable of discriminating turn-on and turn-off state
Inventor: LEE CHOI HUN
IPC: F21V1/00
Filed: 2003-04-15
Abstract: PURPOSE: A light fixture cover is provided to easily discriminate turn-on and turn-off state of a light fixture by permitting the pattern on an outer case to appear when the light fixture is turned off and the pattern on an inner case to appear when the light fixture is turned on. CONSTITUTION: A light fixture cover comprises a semi-transparent inner plate with a pattern, and a semi-transparent outer plate with no pattern. The cut portions of the inner plate and the outer plate are fit to a groove(6-1) formed at a coupling member(6) in such a manner that the space formed between the inner plate and the outer plate is maintained. Alternatively, the outer plate has a pattern different from the pattern of the inner plate.