baber/WOPTO huggingface dataset:
Patent KR-20020056187-A (KR)
Title: Method for management state machine of mobile management module for UMTS packet service
Inventor: LEE DONG GEUN
IPC: H04L12/24
Filed: 2000-12-29
Abstract: PURPOSE: A state machine management method of a movement managing module for UMTS(Universal Mobile Telecommunication System) is provided to apply only the state machine without an outside flag to the message transmission operations for the operations of the movement managing module itself or CM entities as upper modules of the movement managing module. CONSTITUTION: A location registration start state(20) includes a location registration start-approach layer connection state(21). The location registration start-approach layer connection state(21) is a state that the approach layer connection is not yet established after transmitting a location registration request message. A location registration start-approach layer connection waiting state is a state that a response message is not yet transmitted from a central network though the approach layer connection is established. A service request start state(70) includes a service request start-approach layer connection state(71). The service request start-approach layer connection state(71) is a state that an approach layer connection is not yet established after transmitting a service request message. A service request start-approach layer connection waiting state(72) is a state that a response message is not yet transmitted from a central network though the approach layer connection is established. A registration state-normal service state(40) is a registration state-normal service-packet connection state(41). The state(41) is a state that a response message is received from the central network. A registration state-normal service-packet non-connection state(42) is a state that the connection is canceled after the passage of the constant time.
Patent KR-20010016626-A (KR)
Title: Electric Generator of Wheel emitting Light and Circuit thereof
Inventor: CHUNG KEUN CHOON
IPC: F21L14/04
Filed: 2000-12-29
Abstract: PURPOSE: A generator of a light emitting wheel and a circuit of the generator are provided to prevent the damage of a permanent magnet during the assembling process and the rotation of the wheel by simplifying the structure of a permanent magnet assembly of the generator. CONSTITUTION: The light emitting wheel is engaged with a support shaft extended from a kick board and a frame of a roller skate, and emits the light according to the rotation of the wheel. A plurality of guide bushings(120) are separated to an inner diameter shaft and an outer diameter shaft, and the right side and the left side constitutes groups respectively. The inner diameter shaft is inserted into the outer peripheral surface of a support shaft. A permanent magnet(130) is engaged with the outer diameter shaft. The inner and outer diameter shafts of the guide bushing is formed with a plurality of locking taps protruded horizontally with respect to the support shaft. A coil assembly(150) is installed so as to surround the outer peripheral surface of the magnet assembly. The coil assembly(150) comprises a bobbin, a device mounting section, right and left side covering section, and a plurality of armature cores(175). A plurality of light emitting devices receive different AC voltage from a plurality of coils, and emits the light.
Patent KR-20020058719-A (KR)
Title: An apparatus for pulling out scraps
Inventor: KWON O BO
IPC: B21D45/00
Filed: 2000-12-30
Abstract: PURPOSE: An apparatus for pulling out scraps is provided to easily pull out the cut scraps after cutting scraps generated when pressing a panel product at one side of a forming press using a scrap cutter. CONSTITUTION: The apparatus for pulling out scraps comprises a hinge bracket(15) which is mounted on a base plate(1) at one side of a lower die(3) of a forming press for forming a panel product(11), and on the upper part of which a hinge hole(17) is formed; and a pulling out plate(19) one side of which is locked to the hinge hole(17) at the upper part of the hinge bracket(15) by a hinge, and in which a weight part(23) is installed at the outer side end to a lower die(3) of the forming press so that the inner side end is ascended by dead load of the pulling out plate(19), wherein the weight part(23) of the pulling out plate(19) is installed on the lower surface of the outer side end of the pulling out plate(19).
Patent KR-20020056974-A (KR)
Title: Integrated Information System for Construction Management using Internet
Inventor: LEE MIN NAM
IPC: G06Q99/00
Filed: 2000-12-30
Abstract: PURPOSE: A construction management integrated information system using the Internet is provided to support all of the construction companies and their departments like development, human resource, finance, electricity and equipment in one integrated system. CONSTITUTION: The system is a kind of an ERP system and uses of DBs and communication networks. The system makes DBs like management team information DB, management information DB and field information DB with general operations like general affairs, finance, materials, business and development, and planning management operation like officers, planning, technology and computer works. The DBs consist of Oracle DBMS server, which has construction work management system and field management system, Windows based field systems and many clients connected by the Internet. The management department is connected to the main server with LAN and the field systems are connected to the server with the Internet. The main technology is the mixture of 2-tier and 3-tier systems to be suitable to the concept of client/server and entrepreneur information system to help decision-making. The system consists of many sub-systems like human resource management system, finance information system, business information system, sales management system, technology information system and so on.
Patent KR-20010022678-A (KR)
IPC: A61M5/315
Filed: 1998-08-06
Abstract: A delivery device including a) a housing, b) a container for a fluid arranged in the housing, the container having an opening, c) a delivery conduit connected in fluid communication with the opening, the conduit having a front end in flow respect distal from the container and a rear end in flow respect proximal to the container, the front end and the rear end defining an axis therebetween and a forward direction and a reward direction, and d) a pump arranged to deliver fluid at least in a direction from the container through the conduit, the device comprising, a sensor able to change state in at least one respect in response to a predetermined proximity of an object to the sensor in a sensing direction, a converter, separate from or integral with the sensor, converting at least one of the sensor states into an electromagnetic signal, and a processor, receiving the electromagnetic signal and delivering a control signal to an operational component of the device.
Patent KR-20010023963-A (KR)
Title: 세탁된 직물에 외관 및 보존성 잇점을 제공하는셀룰로스계 중합체를 갖는 세탁 세제 조성물
IPC: C08B11/193
Filed: 1998-09-15
Abstract: 본 발명은 다음의 물질들을 함유하는 세정액에서 세탁된 직물 및 옷감에 직물 외관 및 보존성 잇점을 부여할 수 있는, 직물 처리제로서 특정한 셀룰로스계 중합체 또는 올리고머 물질을 이용하는 조성물 및 방법에 관한 것이다.  구체적으로, 상기 셀룰로스계 중합체 또는 올리고머는 화학식 Ⅰ의 화합물이다. 
     화학식 Ⅰ 
     
       
     
     상기식에서, 
     R은 각각 R 2 , R C 및 (a)로 이루어진 그룹으로부터 선택되고, 
     R 2 는 각각 독립적으로 H 및 C 1 -C 4 알킬로 이루어진 그룹으로부터 선택되고, 
     R C 는 각각 (b)이고, 
     Z는 각각 독립적으로 M, R 2 , R C 및 R H 로 이루어진 그룹으로부터 선택되고, 
     R H 는 각각 독립적으로 C 5 -C 20 알킬, C 5 -C 7 사이클로알킬, C 7 -C 20 알킬아릴, C 7 -C 20 아릴알킬, 치환된 알킬, 하이드록시알킬, C 1 -C 20 알콕시-2-하이드록시알킬, C 7 -C 20 알킬아릴옥시-2-하이드록시알킬, (R 4 ) 2 N-알킬, (R 4 ) 2 N-2-하이드록시알킬, (R 4 ) 3 N-알킬, (R 4 ) 3 N-2-하이드록시알킬, C 6 -C 12 아릴옥시-2-하이드록시알킬, 
       (c), (d) 및 (e)로 이루어진 그룹으로부터 선택된다. 
     상기 셀룰로스계 중합체 또는 올리고머에서 그룹 R H 에 대한 치환도는 약 0.001 내지 0.1이고, 상기 셀룰로스계 중합체 또는 올리고머에서 Z가 H 또는 M인 그룹 R C 에 대한 치환도는 약 0.2 내지 2.0이다.
Patent KR-20010015823-A (KR)
Title: 반잠수형 굴착장치의 밸러스팅
IPC: B63B35/44
Filed: 1998-11-13
Abstract: 굴착장치와 같은 반잠수 구조물은 사용장소로 이동될 수 있는 통과 상태와, 사용장소에서, 예를 들어 굴착과 같은 작업에도 매우 안정스럽게 사용될 수 있는 반잠수 상태를 갖는다.  이러한 구조물은 머드와 같은 소모성 고체나 액체 재료와, 굴착관과 같은 제거가능 설비를 이송하는데 사용된다.  상기 소모성 설비와 제거가능 설비는 사용시 구조물로부터 제거되므로써, 구조물의 전체 질량을 감소시킨다.  상기 구조물은 소모성 재료를 위한 제 1 격벽 세트(66, 68, 70, 71, 84, 86, 88)를 내장하고 있는 판툰 수단(4, 8)과, 소모성 재료의 제거를 보상하기 위해 밸러스트를 제 1 격벽 세트에 유도하는 밸러스트 제어수단을 포함한다.  상기 구조물은 밸러스트 탱크를 포함하지만, 배치는 다음과 되도록 이루어져야 한다.  즉, 제 1 격벽 세트가 비어있고 구조물에 소모성 재료나 제거가능 설비가 이송되지 않는 경우, 밸러스트 탱크를 밸러스트로 충진하는 것은 구조물을 상기 반잠수 상태를 달성하기에 충분할 정도로 잠기게 하지 않으며, 상기 상태는 제 1 격벽 수단이 적어도 부분적으로 충진된 경우 달성될 수 있도록 이루어져야 한다.  따라서, 구조물은 소모성 재료나 밸러스트를 수용할 수 있게 하는 "이중 목적"을 포함하므로써 구조물의 유효 갑판부하를 감소시킨다.
Patent KR-20010032265-A (KR)
Title: 연속 송풍 방사섬유 수집방법 및 장치
IPC: D01D5/08
Filed: 1998-09-09
Abstract: 본 발명은 연속하는 섬유의 송풍 방사방법 및 방사장치를 제공한다. 본 발명의 신규한 방법은 섬유의 느슨해짐을 방지하기 위해 장력부여 장치를 이용한다. 본 발명은 또한 송풍 방사방법에 의해 제조되는 연속하는 섬유를 이용하는 신규한 섬유제품을 제공한다.
Patent KR-20010040764-A (KR)
Title: 중합체 입자
IPC: B29B9/12
Filed: 1999-01-27
Abstract: 본 발명은 체적 대 표면적의 비율이 0.5 mm 미만이고, 길이가 1.5 mm 내지 3 mm인 중합체 입자에 관한 것이다.  본 발명은 또한 본 중합체 입자의 제조 방법 및 성형 물질을 제조하기 위한 그의 용도에 관한 것이다.
Patent KR-20010040940-A (KR)
IPC: C07D491/052
Filed: 1999-02-15
Abstract: Compounds having Formula Iare useful for partially or fully antagonizing, repressing, agonizing, or modulating the glucocorticoid receptor in a mammal and treating immune, autoimmune and inflammatory diseases in a mammal. Also disclosed are pharmaceutical compositions comprising compounds of Formula I and methods of inhibiting immune or autoimmune diseases in a mammal.
Patent KR-20010024977-A (KR)
Title: 모놀리식 집적 트렌치 ｍｏｓｆｅｔ 및 쇼트키 다이오드
IPC: H01L27/06
Filed: 2000-02-10
Abstract: 쇼트키 다이오드와 고성능 트렌치형 게이트 MOSFET을 함께 모놀리식 집적한 구조 및 방법을 제공한다. MOS 인핸스드 쇼트키 다이오드 구조(210)는 MOSFET 스위치의 성능 특성을 강화시키기 위해 트렌치 MOSFET 셀 어레이(206, 212) 전체에 배치된다. 이 쇼트키 구조의 낮은 장벽 높이를 이용하여 순방향 전압 강하가 감소된다. 세부적인 실시예에서, 쇼트키의 드리프트 영역에서 공핍이 인접한 MOS 구조에 의해 좌우되고 제어되는 것과 같이, 트렌치의 폭은 쇼트키 다이오드의 역방향 전압 능력을 증가시키도록 조절된다.
Patent KR-20010025000-A (KR)
IPC: F16K31/64
Filed: 1999-07-24
Abstract: The invention relates to a valve for hot-water systems. In addition to a first plug (24) for characterising the flow in a throttle-type manner, the inventive valve has a second plug (25) which consists of two parts and comprises the following: a) a closing body (30) which is drive-connected to a valve cone (26), said closing body projecting into the housing valve seat (20) and being provided with a leakage bore (32) and b) a seat ring (34) which is able to rest on the housing valve seat (20) or on the closing body (30) and on the valve cone (26).
Patent KR-20010071357-A (KR)
Title: 특히 자동차에서 실행할 수 있는 폐쇄 기능을 위한 폐쇄장치
IPC: E05B17/00
Filed: 1999-05-20
Abstract: 본 발명은 폐쇄 실린더(70)가 프리 부싱(20)과 폴로우어(15)가 제공된 실린더 코어(10)를 포함하고 있는 폐쇄 장치(71)에 관한 것이다.  상기 프리 부싱(20)은 하우징(30)에 회전될 수 있게 설치되어 있다.  정상적인 경우에는, 상기 부싱은 오버로드 인터록(60)의 스프링 하중을 받는 잠금-조정-부재(61')에 의해 회전가능하게 고정되어 있다.  상기 폐쇄 기능은 동작 부재(50)에 의해 이루어지고, 상기 동작 부재는 상기 동작 부재(50) 안에 배열된 회전가능하게 고정되어 이동가능한 슬라이더(40)와 함께 동작한다.  구조적으로 낮은 축방향 높이를 가지는 공간 절약형 장치(71)를 제공하기 위해, 상기 잠금-조정-부재(61')는 반경방향으로 자유로운 위치에 있으며 판 형상의 스프링(37)으로부터 직접 하중을 받는다.  그런 경우, 상기 슬라이더(40)에 무관하게, 상기 폴로우어(15)도 배열되어 있는 실린더의 한 영역(12)으로 상기 잠금-조정-부재(61')가 이동할 수 있게된다.  축방향 연결부(80)는 상기 오버로드 인터록(60)으로부터 상기 슬라이더(40)로의 스프링 하중(33)의 전달을 가능하게 한다.
Patent KR-20010052709-A (KR)
Title: 와니스 조성물 및 액정 표시 소자
IPC: C08L77/00
Filed: 2000-04-07
Abstract: 본 발명은 액정 배향막으로 한 경우에 요구되는 잔류 전하, 전압 유지율 및 스티킹 등의 전기적 특성, 프리틸트각, 도포성, 및 배향성 등이라고 하는 여러가지 특성의 향상을 종합적으로 또한 균형있게 달성가능한 와니스 조성물을 제공하는 것에 있고, 당해 와니스 조성물은 화학식 1의 폴리아미드산, 화학식 2의 폴리아미드 또는 화학식 2의 폴리아미드와 화학식 3의 가용성 폴리이미드로 이루어지는 중합체 성분과 용제로 이루어지는 와니스 조성물이고, 당해 중합체 성분은 화학식 2로 나타내는 폴리아미드를 1 내지 60 중량% 함유하고, 당해 와니스 조성물은 중합체 성분을 0.1 내지 40중량% 함유하는 것이다. 
     화학식 1 
     
       
     
     화학식 2 
     
       
     
     화학식 3
Patent KR-20020061339-A (KR)
Inventor: KIM YEONG JU
IPC: H01H85/22
Filed: 2001-01-16
Abstract: PURPOSE: A current limiting fuse holder apparatus is provided to allow fuse replacement work to be performed in a convenient and safe manner, by eliminating the necessity of using an additional device for fuse replacement. CONSTITUTION: A current limiting fuse holder apparatus comprises an upper clip(11) fixed to a first electric insulator so as to support a conductive portion of a fuse; a support fixed to a second electric insulator(2) arranged at the opposite side of the first electric insulator; a lower clip(12) coupled to be rotatable to the support through a shaft pin, and which supports the other conductive portion of the fuse; a conductive plate interposed between the support and the lower clip, and which electrifies the lower clip; and a separation ring(19) fixed to the fuse body.
Patent KR-20010078038-A (KR)
Title: Antenna
Inventor: YUN KWANG HO
IPC: H04R1/10
Filed: 2001-01-20
Abstract: PURPOSE: An earphone combined with an antenna is provided to handle a distance between a transmitter and a receiver by inserting or drawing an earphone line and an antenna line to an inside or an outside of a case. CONSTITUTION: An inlet and outlet portion A(11) and an inlet and outlet portion B(12) are formed at both sides of a case(1). A radio wave reception plate(14) is at an outer side of the case(1). A wiring reel(2) is formed around a fixing axis(13) of the case(1). A coil spring(3) is connected between the wiring reel(2) and the fixing axis(13). A folding portion(40) is fixed to an outer circumference of the wiring reel(2). The first wire(4) passes through the inlet and outlet portions A and B(11,12). A receiver(51) is formed at one side end of the first wire(4). A transceiver plug(52) is formed at the other side end of the first wire(4). A transmitter(61) is formed at the first wire(4) between the receiver(51) and the case(1). An antenna portion(7) is connected with the third wire(71). An antenna plug(72) is formed at one side of the antenna portion(7). A wire distribution portion(8) distributes the first, the second, and the third wires(4,62,71) to the transceiver plug(52) and the antenna plug(72).
Patent KR-20010078174-A (KR)
Title: Semiconductor device and method of manufacturing the same
Inventor: MIYAZAKI TAKASHI
IPC: H01L21/56
Filed: 2001-01-31
Abstract: PURPOSE: To obtain a semiconductor device and its manufacturing method which can relieve distortion stress applied to a metal bump and improve mounting reliability while underfill resin between a semiconductor chip and a mounting substrate is made unnecessary, evade damage to a peripheral device or the like containing the mounting substrate in the case or recovery processing, and realize low cost. CONSTITUTION: In this semiconductor device, an electrode pad 18 formed in the semiconductor chip 21 is connected with each corresponding electrode of the mounting substrate via the metal bump 26. The semiconductor device is provided with a passivation film 19 having an aperture part exposing the electrode pad 18 formed in the chip 21, a salient electrode part 20 whose one end is connected with the electrode pad 18 through the aperture part, a post electrode 16A connecting the other end of the electrode part 20 with the metal bump 26, and an insulating resin layer 13 which has elasticity and covers the post electrode part 16A excepting its end surface, the salient electrode part 20 and the passivation film 19.
Patent KR-20010078194-A (KR)
Title: Memory module with short access time
Inventor: DIETRICH STEFAN
IPC: H01L27/10
Filed: 2001-01-31
Abstract: PURPOSE: A memory module having short access time is provided to suppress an access time for bits of desired quantity to the minimum in synchronous access by improving a memory module based on conventional technology. CONSTITUTION: A switch(10) is arranged so that the further a local data line(4) is relatively apart from an output amplifier(6), the shorter the maximum transmission time of a bit in the local data line(4) is for the other local data line(4) simultaneously required for synchronous memory access. Thus, the access time for the bits determined quantity can be minimized by the memory module on performing the synchronous memory access, thereby enabling shorten access time for the memory module.
Patent KR-20020064444-A (KR)
Title: Disk cartridge for high-density data recording
Inventor: PARK GEON SUN
IPC: G11B23/03
Filed: 2001-02-01
Abstract: PURPOSE: A disk cartridge for recording hyper-density information is provided to protect a disk surface, to prevent entrance of polluted matters, to reduce a thickness of a cartridge, and to simplify a structure of the disk cartridge. CONSTITUTION: A disk cartridge for recording hyper-density information includes a recorder, a case(20), a fixing ring(22), and a shutter(23). The recorder stores information. The recorder is inserted into the recorder. The fixing ring is adhered inside the case and supports the recorder, which is inserted into the case. The shutter is formed on the case. The case, in which the recorder is inserted, is opened partly or wholly at a lower end surface. The fixing ring has an end(22a) fixed to a side of the case and the other end(22b) being capable of freely moving.
Patent KR-20020066782-A (KR)
Title: Method of manufacturing a sulfur electrode and electrolyte of atmospheric temperature lithium/sulfur battery having ultra high capacity
Inventor: AHN HYO JUN
IPC: H01M4/60
Filed: 2001-02-13
Abstract: PURPOSE: Provided are methods for producing a sulfur electrode of ultrahigh capacity, shelf stable lithium sulfur battery and electrolyte, having increased mechanical strength by comprising a ceramic powder and a metal powder. CONSTITUTION: The anode of ultrahigh capacity, shelf stable sulfur battery is produced by the steps of (i) providing an electrode material consisting of 10-60 wt% of sulfur, 10-30 wt% of carbon, 10-55 wt% of PEO(polyethylene oxide), 3-10 wt% of Li-salt; and (ii) mixing the electrode material using high energy ball mill. The electrolyte of ultrahigh capacity, shelf stable sulfur battery is produced by the steps of (i) providing any one of polymer selected from polyvinylidene fluoride(PVdF), PAN(polyacrylonitride) and PMMA(polymethyl-methacrylate); (ii) providing any one of plasticizer selected from EC(ethylene carbonate), PC(propylene carbonate), TG(tetra(ethylene glycol)dimethyl ether), NMP(1-methyl-2-pyrrolidinone) and DEC(diethyl carbonate); (iii) providing a lithium salt for increasing ion conductivity; and (iv) adding a metal oxide to the mixture in order to impart mechanical strength to the mixture.
Patent KR-20010082725-A (KR)
Title: Coloring coating agent and colored bulb
Inventor: KONISHI HIDEKI
IPC: C09D7/12
Filed: 2001-02-17
Abstract: PURPOSE: To provide a colored coating agent that is excellent in adhesion of the coating film and can provide a yellow emission of excellent visibility for a long period of time. CONSTITUTION: In the colored coating agent at least including a binder, a pigment and a dispersant, the binder is a sol prepared by partial reaction of an organosilicon compound; the pigment is a mixed pigment of a red iron oxide pigment and a yellow organic pigment at a weight ratio of 1/10 to 2/1 where the particles of the red iron oxide is spherical with a particle size of 0.1-0.3 μm; the yellow organic pigment has particle sizes of > 0.3 μm and the binder and the mixed pigment are formulated at a weight ratio of the binder (on the solid basis) to the mixed pigment of 2/1 to 2/5.
Patent KR-20020068562-A (KR)
Title: organic electroluminescence display and manufacturing method thereof
Inventor: CHOI SANG EON
IPC: H01L51/52
Filed: 2001-02-21
Abstract: PURPOSE: An organic ELD panel is provided to lengthen life span of the product by eliminating moisture inside and preventing deterioration of the lighting elements. CONSTITUTION: An organic ELD panel comprises a lighting substrate(12), a protection layer(13), a sealing material(14), a rear substrate(15), and a liquid crystal. A lighting layer(11) is formed at top of the lighting substrate(12). An insulation material is deposited on the lighting layer(11) for protection. The sealing material(14) is formed at the top edge portion of the lighting substrate(12). The rear substrate(15) is encapsulated on the lighting substrate in order to form the space portion by being spaced from the lighting substrate through sealing of the sealing material. The liquid crystal is filled into the space formed between the lighting substrate and the rear substrate, dehumidifies moisture inside of the space, and absorbs and cools the heat emitted on lighting of the lighting layer.
Patent KR-20020069695-A (KR)
Title: Method for preventing a flake of dome shield
Inventor: JANG DAE GEUN
IPC: H01L21/3065
Filed: 2001-02-27
Abstract: PURPOSE: A method for preventing flakes of a dome shield is provided to prevent a wafer from being contaminated by particles like etch byproducts, by coating an aluminum layer on the dome shield. CONSTITUTION: The surface of the dome shield(12) is coated with an aluminum layer to prevent the etch byproducts(14) fixed to the surface of the dome shield from being desorbed from the surface of the dome shield. A dummy wafer coated with aluminum is introduced to the inside of a plasma etch chamber and is dry-etched by using radio frequency so that the surface of the dome shield is coated with the aluminum separated from the surface of the dummy wafer.
Patent KR-20020071646-A (KR)
Title: Novel Bacillus sp. WRD-2 isolated from soil and fibrinolytic agent composition comprising extracellular protease produced by the WRD-2 isolated from soil as an effective component
Inventor: CHO YEONG SU
IPC: C12N1/20
Filed: 2001-03-07
Abstract: PURPOSE: Provided are a novel bacillus sp. WRD-2 isolated from soil and a fibrinolytic agent composition comprising extracellular protease produced thereby as an active ingredient. The novel bacillus sp. WRD-2 produces protease having over 90% of enzyme activity at low temperature of 20-40 deg.C thus has excellent fibrinolytic activity. CONSTITUTION: The novel bacillus sp. WRD-2(KCTC 0869BP) is isolated from a soil sample by screening 30 strains producing a clear zone of protease having a size of 2cm or more and screening a strain having the most excellent enzyme activity. The fibrinolytic agent composition contains extracellular protease produced by the bacillus sp. WRD-2(KCTC 0869BP) as an active ingredient and shows excellent fibrinolytic activity.
Patent KR-20020071657-A (KR)
Title: Circuit for Controlling Brightness of Monitor
Inventor: KIM JU MAN
IPC: H04N5/57
Filed: 2001-03-07
Abstract: PURPOSE: A circuit of controlling brightness of a monitor is provided to compensate a variation in control grid voltage according to a change in the horizontal synchronous signal of the monitor and a temperature variation in external environments to stabilize back raster brightness of the monitor. CONSTITUTION: A circuit of controlling brightness of a monitor includes a fly back transformer, a microcomputer(300), and a control grid voltage compensation unit(100). The fly back transformer generates a voltage according to a horizontal synchronous signal frequency to apply the voltage to a control grid. The microcomputer outputs a PWM signal according to the horizontal synchronous signal frequency. The control grid voltage compensation unit generates a compensation voltage according to the PWM signal to cancel a variation in the output voltage of the fly back transformer and compensates a variation in the compensation voltage according to a change in surrounding temperature.