baber/WOPTO huggingface dataset:
Patent KR-20030055856-A (KR)
Title: Fabricated Method Of Liquid Crystal Display Apparatus Integrated Film Type Touch Panel
Inventor: BANG YONG IK
IPC: G06F3/033
Filed: 2001-12-27
Abstract: PURPOSE: A film type touch panel integrated LCD(Liquid Crystal Display Device) is provided to simplify a process of the LCD and to improve the display quality by sticking a touch panel integrated polarized plate on an LCD panel. CONSTITUTION: LCD panels containing many liquid crystal cells are formed in each crossed portion of gate lines and data lines. The liquid crystal panels are washed. Polarized plate integrated touch panels are stuck to recognize corresponding information by directing an image from the liquid crystal panels through a stylus pen or a finger. PCBs(Printed Circuit Substrates) to feed driving signals are electrically connected with the liquid crystal panels. Backlight devices to project uniform light are assembled with the liquid crystal panels. The touch panels, the liquid crystal panels and the backlight devices are assembled by confirming each other.
Patent KR-20030057929-A (KR)
Title: Public network and private network combination security system and method thereof
Inventor: BAE HUI CHAN
IPC: H04L12/22
Filed: 2001-12-29
Abstract: PURPOSE: An internal/external network integrated security system and method thereof are provided to control every traffic generated on a network and actively cope with a security violation event by adding a network detecting function and performing an independent log policy. CONSTITUTION: A firewall system(100) improves a performance of a security system by recording only a violated matter among functions such as a packet filter, a NAT(Network Address Translation) and a VPN(Virtual Private Network) as log information. An NIDS(Network Intrusion Detection System)(200) actively copes with a violated matter by detecting a traffic generated on an internal network. The NIDS collects and analyzes packets, then records only a violated matter as log information. A network log managing system(300) records log information on a traffic used in an internal network and a traffic from the internal network to an external network or from the external network to the internal network, and improves a performance and safety of a security system by collecting packets through an interface. A Log1 is a database storing violation log information in the firewall system(100). Log2 is a database storing detection(violation) log information received from the NIDS(200). Log3 is a database storing log information of a normally passed traffic in the firewall system(100) and every network traffic generated in the internal network. Interface1 is exclusively used for the external network. Interface2 is exclusively used for the internal network and communication. Interface3 is exclusively used for the NIDS. Interface4 is exclusively used for a network log.
Patent KR-20030058798-A (KR)
Title: internet genealogy chating system
Inventor: LEE SANG LOG
IPC: G06F17/00
Filed: 2001-12-31
Abstract: PURPOSE: A system for a pedigree Internet relay chat is provided to have a conversation with members by joining to a pedigree Internet relay chat, storing/managing multimedia data, forming a member group, and managing a relative. CONSTITUTION: A pedigree of a user is searched through the Internet. The user prepares, stores, and deletes data related to oneself. The user stores and deletes multimedia data related to the pedigree, opens an Internet relay chat, and chats with family members. The user creates a group based on a relative and chat with the family members. The user stores, modifies, and deletes related multimedia information in the pedigree on the Internet.
Patent KR-20010079830-A (KR)
Title: Therapeutic compositions (ⅱ)
IPC: A61P9/10
Filed: 1999-09-15
Abstract: Method of producing a physiologically acceptable ketosis such as to treat a patient in need of therapy for one or more of Amylotrophic lateral sclerosis, Free Radical disease, Heart failure and Duchenne's muscular dystrophy by oral administration to the patient of a cyclic oligomer of formula (I) where n is an integer of 1 or more or a complex thereof with one or more cations or a salt thereof, wherein the physiologically acceptable ketosis is characterized by blood levels of (R)-3-hydroxybutyrate of from 0.5 to 20 mM.
Patent KR-20010073191-A (KR)
Inventor: SCOTT ROBERT ANTHONY
IPC: A61K9/50
Filed: 1999-08-11
Abstract: The invention concerns compositions from modified starches, such as starch ethers or oxidized starch, more particularly hydroxpropylated starch (HPS) or hydroxylethylated starch (HES) for the use in pharmaceutical, veterinary, food, cosmetic or other products like films for wrapping food, aspics or jellies, preferably for predosed formulations like soft or hard capsules. The hard capsules obtained by the present invention with a conventional dipping molding process are similar to hard gelatine capsules (HGC).
Patent KR-20010085897-A (KR)
IPC: C07D263/42
Filed: 1999-09-21
Abstract: 본 발명은 하기 화학식(1)의 화합물에 관한다. 
     [화학식 1] 
     
       
     
     [식중, Y는 O, S 또는 CH 2 이고; R 1 은 임의치환된 아릴 또는 복소방향족 링인데 임의 치환체는 할로겐, C 1 -C 4 -알킬, C 1 -C 4 -알콕시 또는 C 1 -C 4 -할로알콕시에서 선택되고; R 2 및 R 3 는 독립적으로 수소 또는 할로겐에서 선택되며; R 4 및 R 5 는 독립적으로 할로겐에서 선택됨. 
     이 화합물은 제초제로 유용하다.
Patent KR-20010093129-A (KR)
Title: Milling Process for the Production of Finely Milled Medicinal Substances
IPC: B02C23/06
Filed: 1999-12-01
Abstract: The invention is an improved method of generating fine medicament powders suitable for inhalation. A fluid energy mill is used with conventional milling fluids such as air or nitrogen. The milling fluid is treated to have a controlled relative humidity of between 30% and 70%. This produces a fine medicament powder with a median particle size below 10 micrometer but with little or no amorphous content generated during milling. Scale formation in the mill chamber is also greatly reduced.
Patent KR-20010080728-A (KR)
IPC: C08G77/32
Filed: 1999-09-30
Abstract: 본 발명은 60℃이상의 글라스전이온도(Tg) 및 많아야 1wt%의 OH함량을 가진 오가노폴리실록산에 관한 것이다.
Patent KR-20010101203-A (KR)
IPC: C07D295/04
Filed: 1999-12-14
Abstract: 본 발명은 선택성 MEK 저해제, 바람직하게는 화학식 (Ⅰ) 및 (Ⅱ)의 화합물을 투여하는 것을 포함하는, 포유동물에서의 장기, 세포, 수족, 및 조직의 이식 조직 거부를 예방 또는 유지하기 위한 방법을 제공한다.
Patent KR-20010101446-A (KR)
Title: Use of antibodies for anticancer vaccination
IPC: C07K16/28
Filed: 2000-01-12
Abstract: Use of an antibody targeted to a human cellular membrane antigen, to manufacture a medicament to prophylactically and/or therapeutically vaccinate against cancer, is new.
Patent KR-20010089802-A (KR)
Title: Aqueous peroxide emulsions
IPC: C08L23/26
Filed: 2000-01-06
Abstract: The invention relates to aqueous peroxide emulsions, optionally containing anti-freeze and/or further additives, which contain a specific emulsifier system comprising a copolymer of an  alpha , beta -unsaturated dicarboxylic acid and a C8-24  alpha -olefin, the acid groups of which are esterified with an ethoxylated alcohol having a degree of ethoxylation of 1-45, as well as an ethoxylated fatty alcohol with an HLB-value greater than 16.
Patent KR-20010101722-A (KR)
Title: 터빈 배기 케이스의 수리
IPC: F02C7/00
Filed: 1999-12-03
Abstract: 수평 장착 영역을 검사하고, 케이스 벽에서 발견된 결함을 용접 수리하고 및 수평 장착 영역내 케이스 벽의 내측위로 재강화 브레이스를 설치하므로써 두 개의 장착 플랜지(2, 3)를 구비한 JT9P 터빈 배기 케이스(1)의 수평 장착 영역을 수리하기 위한 방법을 제공하는 것으로, 상기 재강화 브레이스는 두 번째 장착 플랜지 아래 영역에 겹친다.
Patent KR-20010108182-A (KR)
IPC: B29C45/14
Filed: 2000-12-04
Abstract: 케이스를 구비한 칩형 발광장치(10)는 칩(12)를 포함하며, 칩은 기판(14)의 표면에 형성된 전극(16a)에 다이 접착된다. 또한 발광장치는 케이스를 포함하며, 케이스의 측면(22a, 22b) 각각의 하부 거의 중앙에는 홀들(24a ,24b)이 설치되며, 측면 각각의 상부에는 계단부들(26a, 26b)이 설치된다. 칩을 밀봉하기 위한 투명수지는 홀로부터 주입되며 케이스(20)에 채워진다. 이 때, 투명수지는 케이스 안에서 바닥으로부터 상부로 흘러 공기가 계단부를 포함하는 공기 통기구로부터 배출된다.
Patent KR-20010102413-A (KR)
IPC: H05B33/14
Filed: 2000-12-26
Abstract: 본 발명은 발광 매질 층이 청색 발광 물질, 및 플루오란텐 골격, 펜타센 골격 및 페릴렌 골격중 적어도 하나를 갖는 발광 화합물을 포함하는 것을 특징으로 하는, 사이에 발광 매질 층이 있는 한 쌍의 전극을 갖는 백색계 유기 전자발광 소자에 관한 것이다.  전자발광 소자는 백색 광을 발산하고, 높은 발광 효율을 나타내고, 긴 수명을 가져서 실제로 사용하기에 만족스러운 성능을 갖고 있다.
Patent KR-20020057802-A (KR)
Title: 반사형 ｌｃｄ 용 샘플 및 홀드 컬럼 버퍼
IPC: H04N5/66
Filed: 2001-03-19
Abstract: 본 발명은 잡음 및 전력 소모를 줄이기 위해 펄스로 된 전압 소스 대신, 펄스로 된 전류 소스를 사용하는 반사형(reflective) LCD(RLCD)에서 이미지를 생성하는 시스템에 관한 것이다. 전류는 전류 출력을 구비한 복수의 RAM-구동된 적분 DACs(IDAC)에 의해 공급된다. 각 IDAC는 복수의 연산 트랜스컨덕턴스 증폭기(OTA: operational transconductance amplifiers) 중의 하나와 연계하여 복수의 RLCD 컬럼(columns)을 하나 이상 구동한다. RLCD의 고유의 컬럼 커패시턴스에 의한 인가된 전류의 시간-적분은 컬럼 커패시턴스에 제어된 전압 램프(ramp)를 생성한다. 각 RAM 내의 룩-업-테이블(Look-Up-Table)은 전류값의 시간-미분과 대응하는 8 비트의 디지털 값을 복수 지닌다.
Patent KR-20020022684-A (KR)
Filed: 2001-04-11
Abstract: 재료블록의 작업편을 가공하기 위한 공구를 가이드 하는 방법은, 작업부로부터 일정 거리로 떨어져 있는 공구 축상의 또 다른 지점이 예정된 제 2 가이드로를 따라 가이드되어 공구 이동의 5 개의 동적 좌표가 충분히 결정되는 동안 공구의 재료제거 작업부가 제 1 가이드로를 따라 이동되도록 가이드 된다.
Patent KR-20020019047-A (KR)
IPC: H01L29/08
Filed: 2001-03-19
Abstract: 본 발명은 개선된 전압 항복 성능을 유지하면서 특히 소오스 폴로워 모드에서 개선된 전류조절 능력을 갖는 SOILDMOS 장치에 관한 것으로, 이러한 전류조절 능력의 개선은 제 1 실시예에 있어서, 소오스 영역과 드레인 영역사이에 오프셋 영역을 도입함으로써 실현되며, 이 오프셋 영역은 선형 도핑 프로파일의 실시와 박형 드리프트 영역을 생성하는 SOI층의 박형화 사이의 오프셋을 이룬다. 제 2 실시예에 있어서, 상기 오프셋 영역위에 산화물 층을 제조함으로써 SOI 장치의 전류조절 능력에서의 추가적인 개선을 이룰 수 있는데, 상기 산화물 층의 두께는 상기 박형 드리프트 영역위에 제조된 산화물 층 두께 약 절반까지 변화한다.
Patent KR-20020023952-A (KR)
IPC: A61K8/44
Filed: 2001-06-26
Abstract: 특정한 소수변성 폴리에테르 우레탄과 양이온성 계면 활성제를 함유하는 것을 특징으로 하는 모발 처리제 조성물이다. 
     본 발명의 모발 처리제 조성물은，점도의 온도 안정성이 높고，우수한 유동특성을 가지며，건조후에，모발을 매끄럽고 마무리가 용이하게 하고，우수한 사용감을 가진다． 
     특정한 소수변성 폴리에테르우레탄과 음이온성 계면 활성제 및/ 또는  양쪽성 계면 활성제를 함유하는 것을 특징으로 하는 세정제 조성물이다． 
     본 발명의 세정제 조성물은，우수한 점성을 가지고，기포성 및 거품 지속성에 우수하고，씻어낸 후에도 산뜻하고 미끈거림이 없다．
Patent KR-20030062528-A (KR)
Title: Method for fabricating laser diode spacer
Inventor: YOO JUN SANG
IPC: H01S5/02
Filed: 2002-01-17
Abstract: PURPOSE: A method for manufacturing a laser diode bar is provided to reduce the number of processes and to improve the productivity thereof. CONSTITUTION: A method for manufacturing a laser diode bar includes the steps of: lapping the both sides of the silicone wafer so as to have a predetermined thickness and not performing a polishing to the portion of the surface which is lapped; sawing from the polished surface of the wafer by a predetermined blade; and contacting the polishing surface of the sawed bar to the edge of the light emitting surface when the laser bar(1) is erected so as to perform a mirror coating. In the method, the silicon bar(12) is used during the mirror coating of the laser bar(1) of the semiconductor laser diode.
Patent KR-20030063046-A (KR)
Title: LB84068-Containing composition for prevention and treatment of inflammatory diseases and formulation containing thereof
Inventor: JANG HYE GYEONG
IPC: A61K31/42
Filed: 2002-01-22
Abstract: PURPOSE: A composition containing LB84068 as caspase inhibitors as an effective ingredient is provided. The LB84068 is excellent in anti-inflammatory effect and can be effectively used as prophylactic and therapeutic agents for various diseases caused by inflammation, namely glomerulonephritis, rheumatoid arthritis, chronic colitis(IBD) and systemic inflammatory response syndrome. CONSTITUTION: A composition for the prevention and treatment of inflammatory disease comprises LB84068 of the formula(1), a pharmaceutically acceptable salt, a pharmacologically active material selected from the group consisting of a hydrate, a solvate or an isomer, or two or more mixtures thereof and a pharmaceutically acceptable carrier. The LB84068 has a daily dosage between about 0.3 and 100 mg/day/kg body weight. A formulation containing the composition is selected from the group consisting of tablets, soft or hard gelatin capsules, liquids, suspensions, injectable formulations, ointments, creams, gelling agents or lotions.
Patent KR-20020063508-A (KR)
Title: Thermal printer with sacrificial member
Inventor: KNOTT BARRY R
IPC: B41J2/325
Filed: 2002-01-28
Abstract: PURPOSE: A thermal printer with a sacrificial member is provided to lengthen the life span of a print head by suppressing the abrasion and exposure of the print head. CONSTITUTION: A thermal printer includes a thermally conductive protection belt(24) disposed between a thermal printed head(32) and a web(10). The belt is held generally under tension and prevents the web from directly engaging the thermal print head. The belt is formed in one of many different forms, including a fixed strip or belt, an unpigmented ribbon, a rotatable, continuous belt(26) slowly recirculating during printing to equalize wear across the surface, or a Moebius loop to equalize wear across both sides of the belt. By providing a protection belt between the print head and web, wear and exposure of the print head is reduced. Thereby, the life span of the print head is extended.
Patent KR-20030069301-A (KR)
Title: Exhaust apparatus and air supplying apparatus for semiconductor manufacturing equipment having improved pipe connecting structure
Inventor: HA CHEOL YUN
IPC: H01L21/02
Filed: 2002-02-19
Abstract: PURPOSE: An exhausting and air-supplying apparatus for semiconductor fabricating equipment having an improved pipe connection structure is provided to effectively prevent gas or air from leaking by making a connection pipe connected by a fixing unit. CONSTITUTION: A predetermined process is performed in a plurality of semiconductor process chambers(11). The first connection port(12) is installed in one side of the semiconductor process chamber. The gas exhausted from the semiconductor process chamber is exhausted through a duct(13) in which the second connection port(14) for supplying air to the semiconductor process chamber is installed. The connection pipe(20) is connected between the first and second connection ports. The fixing unit(30) fixes the connection pipe.
Patent KR-20030070220-A (KR)
Title: Organic electro luminescent display
Inventor: KWON O GYEONG
IPC: H05B33/22
Filed: 2002-02-21
Abstract: PURPOSE: An organic electro-luminescence device is provided to shield the light transmitted to a switching transistor by forming a light shield portion on an optical path between an organic electro-luminescence layer and the switching transistor. CONSTITUTION: An organic electro-luminescence device includes a cathode electrode(2), an anode electrode(4), an organic electro-luminescence layer(6), a transistor, a transparent substrate(18), and a light shield portion(14). The cathode electrode(2) is formed with a metallic material. The anode electrode(4) is formed with a transparent conductive material. The organic electro-luminescence layer(6) is arranged between the cathode electrode and the anode electrode. The transistor is electrically connected to the anode electrode in order to supply the current to the organic electro-luminescence layer(6). An organic electro-luminescence cell and the transistor are located on the transparent substrate(18). The light shield portion(14) is located on an optical path in order to shield the input of the light to the transistor.
Patent KR-20020090109-A (KR)
Inventor: KUSHIDA HIROYUKI
IPC: H02J7/00
Filed: 2002-03-19
Abstract: PURPOSE: An electric vacuum cleaner is provided to reduce the size and weight of the electric vacuum cleaner and minimize a loss in electric power. CONSTITUTION: An electric vacuum cleaner(1) boosts a voltage supplied to a motor-driven blower(6) through the use of a boost converter circuit(19) with a DC power supply(10) as a drive source to thereby increase the output of the motor-driven blower so as to enhance dust suction power. As operation modes of such an electric vacuum cleaner, an operation mode for boosting power inputted to the motor-driven blower with the boost converter circuit to thereby increase dust suction power, and an operation mode for deactivating the boost converter circuit, are provided. Consequently, the boost converter circuit is used to enable the boosting of the power inputted to the motor-driven blower only when really required, and a loss in power produced due to the mounting of the boost converter circuit can be reduced. Thus, the service hour per charge for a battery can be set to a level equivalent to an electric vacuum cleaner equipped with no boost converter circuit.
Patent KR-20020080246-A (KR)
Title: Automatic pump
Inventor: SONG TAE YONG
IPC: F04D15/02
Filed: 2002-03-26
Abstract: PURPOSE: An automatic pump is provided to be installed without limit of direction. CONSTITUTION: A pump(100) includes a pump case(110) having a fluid passage formed therein and an inlet pipe(111) and an outlet pipe(113) fluidically connected with the fluid passage, respectively; an impeller(120) installed in the pump case and forcibly taking in and discharging fluid; a motor(130) installed on one side of the pump case to rotate the impeller; a valve part(150) having a valve case(151) having one side fluidically connected with the outlet pipe and the other side fluidically connected with a place to which fluid moves, a valve installed in the valve case to move down by self-weight and up by difference of hydraulic pressure so as to open and close an inside of the valve case and a magnet installed on an upper surface of the valve; a switch part(160) installed on an upper surface of the valve case and turned on/off as the magnet comes near and separates therefrom by vertical movement of the valve; a control part(140) installed on one side of the pump case and receiving signal from the switch part to control the motor; and a device attaching and detaching the valve case to the outlet pipe and controlling installation position of the valve case so that the valve case keeps vertical state.
Patent KR-20030077757-A (KR)
Title: Position precision control apparatus for laser welding by use of robot and method thereof
Inventor: MIN HONG GI
IPC: B23K37/02
Filed: 2002-03-27
Abstract: PURPOSE: An apparatus and a method for controlling positions of a laser welding head are provided to control the position of the laser welding head based on the reference distance between a welding head and a welding object. CONSTITUTION: A laser welding device is operated by means of a positioned controller(25). A welding head conveyer(21) is connected to a tip of a robot joint section(12). A welding head(13) is attached to an upper end of the welding head conveyer(21) so as to allow laser beam generated from a laser generator(15) to be radiated into a welding object through the welding head(13). A distance detecting device(23) is installed at an end of the welding head(13). A position detecting device(22) and a vibration detecting device(27) are installed at an end of the welding head conveyer(21) so as to detect the distance between the welding head(13) and the welding object. A driving section(24) is operated according to an algorithm stored in the position control section.
Patent KR-20030079021-A (KR)
Title: Lift to install a part
Inventor: LEE SANG DONG
IPC: B66F5/02
Filed: 2002-04-01
Abstract: PURPOSE: A lifting device for mounting parts is provided to improve work efficiency by easily lifting and mounting heavy parts. CONSTITUTION: A base plate(100) has a plurality of wheels(110) and is movable. A first-step lifting shaft(200) is vertically installed at the base plate. A first lifting handle(230) is installed at the base plate, and is engaged with the first-step lifting shaft to lift the first-step lifting shaft up and down. A second-step lifting shaft(300) is vertically installed at the top of the first-step lifting shaft. A second lifting handle(310) is installed at the top of the first-step lifting shaft, and is engaged with the second-step lifting shaft to lift the second-step lifting shaft up and down. A placing unit(400), on which parts are placed, is installed at the top of the second-step lifting shaft.
Patent KR-20030083093-A (KR)
Title: A spoiler of bus
Inventor: KIM TAE HUN
IPC: B62D37/02
Filed: 2002-04-19
Abstract: PURPOSE: A spoiler of a bus is provided to easily mount and to prevent foreign materials from being attached on a rear glass by guiding some of air guided along a roof panel to the rear glass. CONSTITUTION: A spoiler of a bus is composed of an outer spoiler(100) and an inner spoiler(200). The outer spoiler includes contact pieces(110) extended at right and left sides, wherein through-holes(111) are arranged to fix toward left and right sides of a roof panel(20), and a plurality of forming units(120) formed in the center, fixed to the roof panel and arranged with through-holes, and other surfaces of the outer spoiler except the forming units are separated from the roof panel at a predetermined interval. The inner spoiler has forming units(210) formed with through-holes at a position corresponding to the forming unit of the outer spoiler and combines with the outer spoiler to have a predetermined space unit.
Patent KR-20020042783-A (KR)
Inventor: RIM KWANG SOO
IPC: F25B43/00
Filed: 2002-05-08
Abstract: PURPOSE: A freezing device using vacuum refrigerant separator is provided to reduce damage to ozone layer due to refrigerant by using water or water mixture as refrigerant. CONSTITUTION: Water or water mixture is used as refrigerant. Refrigerant fluid circulates in an indoor heat absorber(1-1) to absorb heat at low temperature. Refrigerant fluid with temperature increased by heat absorption is separated by a vacuum refrigerant separator into low temperature refrigerant fluid and high temperature refrigerant steam. The low temperature refrigerant fluid circulates in the indoor heat absorber to absorb heat at low temperature. The refrigerant steam circulates in a refrigerant steam heat exchange tank and an outdoor heat radiator to radiate heat at high temperature.
Patent KR-20020041392-A (KR)
Title: Dual-pedal control system
Inventor: HAN JONG GYU
IPC: B60K23/02
Filed: 2002-05-16
Abstract: PURPOSE: A dual-pedal control system is provided to obtain prevention of a sudden acceleration, a quick stop and a chattering, and a cruise function by adding a cruise member for maintaining constant speed, and a sensor member for detecting a neutral position. CONSTITUTION: A dual-pedal control system(100) is connected to a transmission so as to control direction and velocity of rotation of the transmission. The control system comprises a first pedal(110), a second pedal(115) installed adjacent to the first pedal, a control rod(120) connected with the transmission, a transfer member(130) for reversely moving the control rod, a damper(160) connected with the transfer member, and a neutral recovering member(170). The transfer member connects the first and second pedals and the control rod with each other so that the control rod is reversely moved when the first and second pedals are moved in same direction. The neutral recovering member maintains the transfer member in a constant state.
Patent KR-20030089790-A (KR)
Title: The circuit of converting the pollution of a dust collector into electric signal.
Inventor: SEOK HYUN TACK
IPC: F24F3/16
Filed: 2002-05-18
Abstract: PURPOSE: A circuit for converting pollution level of a dust collector into electric signal is provided to get signal changed depending on pollution level of the dust collector by connecting the dust collector with a current transformer and smoothing circuits. CONSTITUTION: A current transformer(5) is installed on a line connecting a high voltage generator(1) and an anion generator(2). A circuit comprises a bridge diode(6), a variable resistor(7), and a condenser(8), and is connected to a rear end of the current transformer. Current flows in the line connected between the high voltage generator and the anion generator to generate anion. The current transformer is installed to measure current without influencing the current. Signal generated by the current transformer is converted into positive signal by the bridge diode. The signal converted by the bridge diode is converted into measurable voltage by the variable resistor and the condenser. The measurable voltage is transmitted to an electric signal processor(9) with a simple A/D converter and a signal processing unit to allow a user to easily recognize pollution level.