baber/WOPTO huggingface dataset:
Patent KR-20020058747-A (KR)
Title: Method for detecting error of oxygen sensor for a vehicle
Inventor: JUNG GEUM CHEOL
IPC: F02D45/00
Filed: 2000-12-30
Abstract: PURPOSE: A method for judging the deterioration of an oxygen sensor is provided to judge whether the oxygen sensor is deteriorated and to inform a user of the vehicle condition. CONSTITUTION: A vehicle includes a sensing unit comprising an oxygen sensor and an electronic control unit. The electronic control unit determines whether the condition of a learning region is satisfied with receiving the signal detected from the sensing unit. When the condition of the study region is satisfied, the electronic control unit starts learning, measures the period of the detected signal received from the oxygen sensor, and determines whether the predetermined learning time elapses. When the learning time elapses, the electronic control unit compares the measured period with a first critical value and determines whether the oxygen sensor is deteriorated.
Patent KR-20020058831-A (KR)
Title: Glass Cutting Apparatus of the Liquid Crystal display
Inventor: KIM SU JONG
IPC: G02F1/13
Filed: 2000-12-30
Abstract: PURPOSE: A substrate cutting apparatus for a liquid crystal display is provided to accurately cut a glass using a difference in laser absorption rates of the glass and a film deposited on the glass. CONSTITUTION: A substrate cutting apparatus for a liquid crystal display includes a laser oscillator(32), a beam focusing unit(34), and a deposited film(30). The oscillator generates laser beams. The beam focusing unit focuses the laser beam generated by the oscillator on a substrate(1). The deposited film has a laser beam absorption rate lower than the laser beam absorption rate of the substrate. The film is deposited on both sides of a scribe line(22) of the substrate.
Patent KR-20010086291-A (KR)
Inventor: FURUYA KENTARO
IPC: F02B61/04
Filed: 2000-12-30
Abstract: PURPOSE: To make two knock pins, regulating the connection position of a crankcase and a case cover, contributing also to reinforcing of the rigidity of the case cover. CONSTITUTION: In this engine, comprising an engine block 12 having a first beating 22 in one sidewall also a crankcase 10 provided with an opening part 14 for assembly of a crankshaft 5 in the other sidewall and a case cover 15 having a second bearing 23 to be connected to the crankcase 10 by a plurality of bolts 40 so as to close the opening part 14, two knock pins, 36, 37 are fitted to the crankcase 10 and the case cover 15 over both connection surfaces 30, 31 of the crankcase 10 and the case cover 15 in the side of a cylinder bore 13 of the engine block 12 from the second bearing 23.
Patent KR-20010021711-A (KR)
Title: 질산염을 사용하지 않는 청색 유리 조성물의 제조 방법
IPC: C03B5/173
Filed: 1998-06-22
Abstract: 본 발명은 유리의 가시광선 투과율은 높게 유지하면서 자외선 흡수성은 개선시키는, 질산염을 사용하지 않는 청색 유리 조성물의 제조 방법에 관한 것이다.  이 방법은 망간 화합물 및 코발트 화합물, 산화 철 및 임의로는 산화 티타늄으로 본질적으로 이루어진 착색제를 용융 유리 형성시 소다 석회 실리카 기재 유리 조성물에 첨가하는 단계로서 이 때 배치에 질산나트륨을 첨가하지 않고 청색 유리를 형성하는 포함하며, 이 때 재료는 두께 4.0 mm에서 주파장이 477 내지 494이고 여기 순도가 6 내지 40%인 상기 청색 유리 조성물을 형성하는데 충분한 양으로 첨가된다.  이 청색 유리 조성물은 그의 총 중량을 기준으로 SiO 2 68 내지 75%, Na 2 O 10 내지 18%, CaO 5 내지 15%, MgO 0 내지 10%, Al 2 O 3 0 내지 5%, 및 K 2 O 0 내지 5%(이 때 CaO + MgO이 6 내지 15%이고 Na 2 O + K 2 O가 10 내지 20%임)로 이루어진 유리 조성물 기재 및 Fe 2 O 3 으로서 산화 철 총 0.4 내지 2.0%, MnO 2 로서 산화 망간 0.15 내지 2.00%, CoO로서 산화 코발트 0.005 내지 0.025% 및 TiO 2 로서 산화 티타늄 0 내지 1.00%를 본질적으로 함유하는 착색제를 포함한다.  상기 유리는 자동차 또는 건축용으로 유용하다.  상기 방법은 용융 작업시 무연탄과 같은 환원제를 사용하는 것이 바람직하다.
Patent KR-20010032746-A (KR)
Title: 성형위치에서 압축지를 절단하는 다이
IPC: B31B50/28
Filed: 1998-12-01
Abstract: 본 발명은 적층 시트편(11)을 절단하여 블랭크를 제조하고, 상기 블랭크를 성형하여 용기를 제조하는 다이 시스템(10)에 관한 것으로, 상기 다이 시스템은 제 1 및 제 2 정합 다이 반부(56, 96)와 커팅 펀치(68)를 포함한다. 상기 제 1 및 제 2 정합 다이 반부(56, 96)는 상기 블랭크로부터 용기를 제조하기 위해 함께 이동되도록 구성되어 있다. 상기 커팅 펀치(68)는 상기 제 1 다이 반부(56) 둘레에서 연장되며, 그와함께 이동될 수 있다. 상기 커팅 펀치(68)는 상기 적층 시트편(11)을 절단하여 블랭크를 제조하도록 구성된다. 상기 다이 반부들(56, 96)의 이동은 커팅 펀치(68)가 상기 적층 시트편(11)으로부터 블랭크를 절단해내게 하고, 상기 다이 반부들(56, 96)의 추가적인 이동은 상기 제 1 및 제 2 다이 반부들(56, 96)이 상기 블랭크로부터 용기를 제조하도록 한다.
Patent KR-20010033866-A (KR)
Title: 편심 기어
IPC: H02K7/116
Filed: 1999-07-02
Abstract: 본 발명은 편심기(8)와 편심 휠(10)을 포함하는 회전 구동 유니트(3)를 가지는 편심 기어에 관한 것이며, 상기 편심 휠은 상기 편심기 상에 회전 가능하게 장착되며 부분 맞물림에 의해 캐리어(15)의 톱니(14)와 함께 동작하는 톱니(11)를 갖는다.  상기 편심 휠(10)은 고정 하우징 부재(6) 내의 리셉터클(106, 108)에서 직접 또는 간접적으로 안내되는 가이드 부재(18, 19)를 갖는다.  본 발명에 따르면, 상기 하우징 부재(6)는 단일 부재이며 상기 리셉터클(106과 108)은 상기 하우징 내부에 진동 가능하게 배치되어 있다.
Patent KR-20010041315-A (KR)
Title: 6,9-이치환 2-[트랜스-(4-아미노시클로헥실)아미노]퓨린
IPC: A61P35/00
Filed: 1999-02-18
Abstract: 본 발명은 화학식 Ⅰ의 화합물, 그의 제약학적으로 허용가능한 염, 광학 이성질체 또는 수화물에 관한 것이다. 
     ＜화학식 Ⅰ＞ 
     
       
     
     식중, R은 R2, R2NH- 또는 H 2 N-R3-이고; R2는 C 1 -C 8 알킬 및 화학식 Ⅱ로 이루어진 군으로부터 선택되고; 
     ＜화학식 Ⅱ＞ 
     
       
     
     상기 식에서, Z는 페닐, 헤테로고리 및 시클로알킬로 이루어진 군으로부터 선택되고, 각각의 R4는 독립적으로 수소 또는 C 1 -C 4 알킬이고, n은 정수 1 내지 8이며; C 1 -C 4 알킬 및 Z 각각은 동일하거나 상이할 수 있으며, Hal, OH 및 C 1 -C 4 알킬로 이루어진 군으로부터 선택되는 1 내지 3 개의 치환체로 임의로 치환되고; R3는 C 1 -C 8 알킬렌이며, R1은 시클로펜틸 및 이소프로필로 이루어진 군으로부터 선택된다.  또한, 본 발명은 세포 주기 진행의 억제 방법을 제공한다.  더욱 구제적으로, 본 발명은 싸이클린 의존성 키나아제, 특히 cdk-2를 억제하는 방법을 제공한다.  또한 본 발명은 신경 세포에서 아팝토시스를 억제하고 신생물의 발달을 억제하는 방법을 제공한다.  추가로, 본 발명은 불활성 담체와 혼합된 분석 가능한 양의 화학식 Ⅰ의 화합물을 포함하는 조성물을 제공한다.  또한, 본 발명은 제약학적으로 허용되는 1종 이상의 담체 또는 부형제와 혼합된 유효 억제량의 화학식 Ⅰ의 화합물을 포함하는 제약 조성물을 제공한다.
Patent KR-20010074500-A (KR)
IPC: A61N1/02
Filed: 1999-05-21
Abstract: Augmentation of electrical conduction and contractility by biphasic stimulation of muscle tissue. A first stimulation phase has a first phase polarity, amplitude, and duration. The first stimulation phase, which acts as a conditioning mechanism, is administered at no more than a maximum subthreshold amplitude. A second stimulation phase has a second polarity, amplitude, and duration. The two phases are applied sequentially. Contrary to current thought, anodal stimulation is applied as the first stimulation phase, followed by cathodal stimulation as the second stimulation phase. In this fashion, pulse conduction through muscle is improved, together with an increase in contractility. Furthermore, this mode of biphasic stimulation reduces the electrical energy required to elicit contraction. In addition, the conditioning first stimulation phase decreases the stimulation threshold by reducing the amount of electrical current required for the second stimulation phase to elicit contraction. The muscle tissue encompassed by the present invention includes skeletal (striated) muscle, cardiac muscle, and smooth muscle.
Patent KR-20010078127-A (KR)
Inventor: HAMAMURA TOMOYUKI
IPC: G06K9/00
Filed: 2001-01-29
Abstract: PURPOSE: A word recognition method is provided to store a word recognition program, and perform word recognition precisely even in the case where the number of characters in a word is not constant. CONSTITUTION: First, image acquisition processing for acquiring an image of a mail is performed by means of the scanner(ST1). Region detection processing for detecting a region in which an address is described is performed by using the image acquired by the image acquisition processing(ST2). There is performed delimiting processing for using vertical projection or horizontal projection, thereby identifying a character pattern in a rectangular region for each character of a word that corresponds to a city name, from a description region of the address detected by the region detection processing(ST3). Character recognition processing for acquiring a character recognition candidate is performed based on a degree of analogy obtained by comparing a character pattern of each character of the word identified by this delimiting processing with a character pattern stored in the character dictionary(ST4). By using the recognition result of each character of the word obtained by this character recognition processing; each of characters of the city names stored in the word dictionary 10; and the probability table 11, the posteriori probability is calculated by each city name contained in the word dictionary, and there is performed word recognition processing in which a word with its highest posteriori probability is recognized(ST5). Each of the above processing functions is controlled by means of the CPU.
Patent KR-20020064594-A (KR)
Title: Pre-alignment for manufacturing semiconductor package
Inventor: HAN CHANG SEOK
IPC: H01L23/00
Filed: 2001-02-02
Abstract: PURPOSE: A pre-alignment for semiconductor package fabrication is provided to easily separate a semiconductor chip from a surface of the pre-alignment in pick-up by improving the structure of the pre-alignment so as to reduce a contact surface with the rear surface of the semiconductor chip fixed with a double sides tape. CONSTITUTION: A pre-alignment(10a) has a panel-type shape including a vacuum hole(12) in the center portion and the pre-alignment(10a) is connected with a driving part supplying a circulation force so as to control the circulation. A number of screw grooves(14) respectively having different diameters are formed on the pre-alignment(10a). At this point, the defined upper portion including the vacuum hole(12) is flatly formed in order to easily adsorb a semiconductor chip.
Patent KR-20020065660-A (KR)
Title: A Image Displaying Device
Inventor: KIM YEONG BEOM
IPC: H04N3/23
Filed: 2001-02-07
Abstract: PURPOSE: An image display device is provided to mount a distortion control device on horizontal/vertical axes of a color cathode ray tube between a deflection yoke and a fluorescent surface, and to apply another current to the distortion control device to form magnetic field, thereby controlling up/down distortion on a screen. CONSTITUTION: An image display device comprises as follows. A panel forms a fluorescent surface. A shadow mask is arranged inside the panel at regular intervals. An electronic gun is mounted on a network of the panel. A deflection yoke deflects electronic beams emitted from the electronic gun, to be located in a predetermined position of the fluorescent surface by the electronic beams. A distortion control device(12) winds coils(8) on a member in a straight line. The distortion control device is mounted on upper/lower horizontal axes of the fluorescent surface of a color cathode ray tube between the deflection yoke and the fluorescent surface. Another current is applied to the coils of the distortion control device, and a magnetic field is formed, to control upper/lower distortions on a screen.
Patent KR-20020071348-A (KR)
Title: Method for manufacturing flat fluorescent lamp
Inventor: LEE YUN JEONG
IPC: H01J9/22
Filed: 2001-03-06
Abstract: PURPOSE: A method of manufacturing a flat fluorescent lamp is provided to form a fluorescent layer having enough thickness and adjust easily thickness in a fluorescent deposition process. CONSTITUTION: A method of manufacturing a flat fluorescent lamp comprises a step of providing a transparent front substrate(11), providing a transparent rear substrate(12) which is opposite to the front substrate and has a plurality of discharge electrodes(14) at its top surface, and a dielectric layer(15) covering the discharge electrode, providing a plurality of spacers formed between the front substrate and the rear substrate for maintaining space between the front substrate and the rear substrate, and forming a fluorescent layer(13) by spraying a fluorescent slurry at least one surface of the front and the rear substrates.
Patent KR-20020072015-A (KR)
Title: Method for advertising by network game using cyber
Inventor: HAN JUNG HEE
Filed: 2001-03-08
Abstract: PURPOSE: An advertisement method during a network game is provided to advertise a product or a song of a singer by making a gamer listen to the CF(Commercial Film) advertisement sound or the song while playing the network game through the Internet. CONSTITUTION: The various kinds of advertisement sound corresponding to a plurality of game tools previously stored in an advertisement sound database. The gamer selects one from some game sorts by connecting to a game web page(109). The gamer selects a genre of the desired music(110). After selecting the genre, the gamer selects and secures some game tools using while playing the game(113). After the start of the game, if the gamer selects one from the secured game tools, the advertisement sound corresponding to the game tool is transmitted to the gamer.
Patent KR-20020074625-A (KR)
Title: A upright-riding bicycle
Inventor: CHOI YONG SIK
IPC: B62K15/00
Filed: 2001-03-21
Abstract: PURPOSE: An upright bicycle is provided to make carrying along easy by reducing size and making the bicycle foldable and to drive the bicycle with strong power by forming the bicycle in the upright state. CONSTITUTION: A bicycle body(100) has a rear wheel(110). A handle shaft(200) is foldable and extendable. A drive sprocket, a driven sprocket and a drive chain drive the rear wheel of the bicycle body. A first sprocket and a second sprocket drive the drive sprocket. A first chain(720) and a second chain drive the first and second sprockets. A first drive pedal(610) and a second drive pedal move the first and second chains. A connecting pulley, a third sprocket, a fourth sprocket and a connecting belt move the first drive pedal and the second drive pedal in opposite directions, respectively.
Patent KR-20020076948-A (KR)
Title: Regenerable antimicrobial animal fiber materials
Inventor: WU FONG CHI
IPC: D06M13/322
Filed: 2001-03-31
Abstract: PURPOSE: A reusable antimicrobial animal textile product with which heterocyclic N-halamine is covalently bonded is provided, thereby reviving the antimicrobial activity of the animal textile product by washing it with a chlorine containing solution. CONSTITUTION: A reusable antimicrobial animal textile product with which heterocyclic N-halamine is covalently bonded is provided, wherein the animal textile product has the antimicrobial activity on pathogenic microorganisms; the animal textile is selected from the group consisting of leather, wool clothes, duck hair and goose hair; and the heterocyclic N-halamine is a chlorinated product of a material selected from monomethylol - 5,5 - dimethylhydantoin (MDMH) and 1,3 - dimethylol - 5,5 - dimethylhydantoin (DMDMH).
Patent KR-20010095229-A (KR)
Title: Time- and Event-controlled Activation System for Charging and Discharging Piezoelectric Elements
Inventor: HOCK ALEXANDER
IPC: H01L41/04
Filed: 2001-04-02
Abstract: PURPOSE: A time- and event-controlled activation system for charging and discharging piezoelectric elements is provided to achieves arbitrarily low average currents during the charging and discharging of piezoelectric elements or piezoactuators. CONSTITUTION: One of the terminals of piezoelectric element(1) is permanently connected to ground, i.e., is connected to a first pole of a voltage source; the other terminal of piezoelectric element is connected to the second pole of the voltage source via a coil(2) and a parallel circuit made up of a charge switch(3) and a diode(4), and to the first pole of the voltage source via coil(2) and a parallel circuit made up of a discharge switch(5) and a diode(6).
Patent KR-20020078527-A (KR)
Title: The preparation of calcium compounds with high purity and function using shell resources
Inventor: CHO SEONG HO
IPC: C01F11/18
Filed: 2001-04-03
Abstract: PURPOSE: Provided is a preparation method of unsintered calcium compound and high purity calcined lime(CaO) by using shells. Also, high functional CaCO3 powder is prepared by coating CaCO3 with organic acid and fatty acid. CONSTITUTION: The preparation method is as follows: (i) separating the flesh from shells by treating with hot water(90-100deg.C) for 1-2hrs.; (ii) washing and crushing shells for unsintered calcium compound; (iii) grinding crushed shells to be the size less than 10micrometer, and treating with hot water(90-100deg.C) for 10-12hrs and ozone(10-20g/Nm¬3) to separate organics(protein) from inorganics (CaCO3); (iv) washing inorganic CaCO3 and drying for pure CaCO3; (v) coating CaCO3 with organic acid(ester) by adding 1-2wt.% of ester to CaCO3 and stirring at a rate of 1000rpm or more at 60-70deg.C; (vi) sintering CaCO3 from step(iv) at 950- 1000deg.C for high purity CaO(>=99.9%); (vii) hydrating CaO from step(vi) by contacting with steam over 1hr for high purity Ca(OH)2; (viii) reacting Ca(OH)2 from step(vii) with CO2 gas at 500-550deg.C or with HCl and Na2CO3 for high purity CaCO3(>=99.99%); (ix) coating CaCO3 from step(viii) with fatty acid(stearic acid) by adding 1-2wt.% of stearic acid to CaCO3 and stirring at a rate of 1000rpm or more at 60-70deg.C.
Patent KR-20020078109-A (KR)
Title: Drain system for oil pan of vehicle
Inventor: HAN BYEONG YEONG
IPC: F01M11/00
Filed: 2001-04-04
Abstract: PURPOSE: An apparatus for discharging impurities of an oil pan for a vehicle is provided to discharge only impurities contained in oil so that extending the change cycle of oil and reducing waste oil. CONSTITUTION: An apparatus for discharging impurities of an oil pan(4) comprises a drain body(10) which is fixed to a fixing hole(2) formed at the bottom of the oil pan, forms an impurities inlet(8) at a portion which is inserted into the oil pan, and whose lower side is open, a drain valve(12) which is detachably mounted to the opened lower side of the drain body and discharges impurities flowed into the impurities inlet, and an opening unit(16) which is installed in the drain body and shuts off the drain of the oil to the outside by tightly shutting off the impurities inlet when the drain valve is detached.
Patent KR-20020078264-A (KR)
Title: Red organic luminous materials and organic electroluminescent device using the same
Inventor: HAN YUN SU
IPC: C09K11/06
Filed: 2001-04-06
Abstract: PURPOSE: Provided are red light-emitting materials and the electroluminescent devices using the same. The red light luminescent materials have π-conjugate bonds of phenothiazine and anthracene groups, which is represented by the formula I, formula II and formula III. In the electric field, the materials exhibit the excellent hole transfer property and electron transfer property, providing the high brightness and high efficiency. CONSTITUTION: The light-emitting materials is produced by π-conjugate bonding phenothiazine and anthracene compounds represented by the formula I, formula II and formula III, wherein R is hydrogen or aliphatic hydrocarbons of C1-20. And the device is layered with an anode, a hole-injecting layer, a luminescent layer, an electron-injecting layer and a cathode, on the base plate in sequence.
Patent KR-20020079215-A (KR)
Title: Adhesive paste composition excellent in color and clearness and the method of printing using the same
Inventor: GOE CHANG MOO
IPC: D06P5/13
Filed: 2001-04-13
Abstract: PURPOSE: A method for printing natural fiber using a printing paste composition obtained by adding an additive such as acrylic resin, bentonite or the like to conventional paste is provided which remarkably reduces the amount of a dye to be used and improves color sharpness and color development during printing natural fiber. CONSTITUTION: A color paste having a viscosity of 9,500 to 10,500cps is prepared by using a paste composition comprising 70 to 90 parts by weight of guar gum or sodium alginate and 30 to 10 parts by weight of at least one selected from the group consisting of carboxymethyl cellulose, acrylic resin, bentonite and silica as an additive sodium, printed into an object to be dyed and then post-treated such as drying, steaming, desizing and soaping after printing.
Patent KR-20010069534-A (KR)
Inventor: PARK CHANG DUK
IPC: F24H3/06
Filed: 2001-04-13
Abstract: PURPOSE: A high pressure hot wind blower boiler is provided to heat as a how wind of a high temperature by maximally absorbing the combustive heat of a burner and to reduce fuel costs by efficiently using the combustive heat. CONSTITUTION: A perspective window(3) and a burner are installed in a combustion chamber(2) of a boiler body. The combustion chamber is connected to an exhaust gas collecting chamber(6) through many heat exchanger pipes(7). Then, combustive heat is delivered through the heat exchanger pipes. An air compressor is installed in an input port(9) of the boiler body to inject air and to absorb the heat from the combustion chamber. After that, the heat from the heat exchanger pipes and the exhaust gas collecting chamber are sequentially absorbed and collected in a first heat collecting chamber and discharged through an exhaust duct(12). While absorbing heat, compressed air is spirally circulated through a dual heat exchange pipe(8) and heated up gradually. Thus, heating efficiency is instantaneously enhanced.
Patent KR-20010069611-A (KR)
Title: PAPR Reduction Method by Delay Circiuts in Multi-carrier Communication System
Inventor: RYU HEUNG GYOON
IPC: H04W52/30
Filed: 2001-04-20
Abstract: PURPOSE: A method for reducing peak to average power ratio(PAPR) using a delay circuit is provided to reduce a complex circuit technique and an additional calculation and to reduce the PAPR without changing information transfer efficiency. CONSTITUTION: An input signal is converted into a quadriphase-shift keying(QPSK) signal through a signal mapping unit(1) and the converted signal is spread by a pseudo noise sequence(2). Before the spread signals are transferred to an inverse fast fourier transform(IFFT) unit(4), the spread signals are delayed by corresponding delay circuits(12) so as to have constellation variation, according to sub carrier waves. The delay circuits(12) change a phase while not changing a signal amplitude.
Patent KR-20020085198-A (KR)
Title: Nuclear fuel cladding tube of zirconium alloys having excellent corrosion resistance and mechanical properties and process for manufacturing thereof
Inventor: BAEK JONG HYEOK
IPC: G21C3/07
Filed: 2001-05-07
Abstract: PURPOSE: A zirconium alloy nuclear fuel coating tube having excellent corrosion resistance and a mechanical characteristic and a fabricating method thereof are provided to improve corrosion resistance and the mechanical characteristic by forming a zirconium alloy including components such as Nb, Sn, Fe, Cu, and Cr. CONSTITUTION: A zirconium alloy is formed with Nb of 0.05 to 0.4 weight percent, Sn of 0.3 to 0.7 weight percent, Fe of 0.1 to 0.4 weight percent, Cu of 0.01 to 0.2 weight percent, Si of 80 to 120 ppm, O of 600 to 1400 ppm, and Zr. The amount of Nb+Sn is 0.35 to 1.0 weight percent. In a fabricating process of the zirconium alloy, an ingot is formed by melting the mixture. The ingot is forged in a beta region. A beta-quenching process is performed under temperature of 1015 to 1075 degrees centigrade. A hot-extrusion process is performed under the temperature of 600 to 650 degrees centigrade. A pilgering process is repeatedly performed and an intermediate vacuum annealing process is performed under the temperature of 550 to 640 degrees centigrade. A final annealing process is performed under the temperature of 460 to 540 degrees centigrade.
Patent KR-20020086046-A (KR)
Title: reflective liquid crystal display device and manufacturing method thereof
Inventor: YOON SEONG HOE
IPC: G02F1/1335
Filed: 2001-05-11
Abstract: PURPOSE: A reflective liquid crystal display device and a method for fabricating the same are provided to control the path of incident light of cholesteric liquid crystal color filters and reflected light by forming a plurality of protrusions on top surface of the color filters, thereby improving the viewing angle and making the light luminance uniform around the viewing angle. CONSTITUTION: A reflective liquid crystal display device includes a first substrate, a light absorbing layer on the first substrate, cholesteric liquid crystal color filters(140) positioned on the light absorbing layer and having a plurality of protrusions on top surfaces, an overcoat layer(150) formed on the cholesteric liquid crystal color filters, first electrodes on the overcoat layer, a second substrate positioned on the first substrate with a predetermined distance, second electrodes formed below the second substrate, a quarter wave plate disposed on the second substrate, a polarization plate disposed on the quarter wave plate, and a liquid crystal layer injected between the first and second electrodes.