baber/WOPTO huggingface dataset:
Patent KR-20020073882-A (KR)
Inventor: CHA JIN MYEONG
IPC: A61C17/02
Filed: 2001-03-16
Abstract: PURPOSE: A clean water supply system of unit chair for dental surgery is provided, which can filter various foreign matter and ionize water to a desired acidity to sterilize bacteria to supply for dental use and purify the used wastewater. CONSTITUTION: The clean water supply system of unit chair for dental surgery comprises a power supply part(100) for supplying power required for a water purification part(200); a water purification part(200) for purifying and ionizing the influent water, the water purification part comprising a pre-filter(210) to filter impurities of more than 5 μm in diameter, an A/C filter(220) and an ACF filter(230) to remove various chemicals, an electrolytic cell(240) to ionize supplied water, an electrolyte tank(270) to supply electrolyte to the electrolytic cell(240), a water tank(260) to store ionized acidic water, a pressure sensor(280) to detect water pressure of the water tank(260), a warmer(290) to heat acidic water supplied to a unit chair(300) to a certain temperature; a unit chair(300); and a mixing tank(400) for mixing wastewater used for dental surgery.
Patent KR-20010095047-A (KR)
Inventor: KUMAMOTO SHINICHI
IPC: C08F10/00
Filed: 2001-03-28
Abstract: PURPOSE: Provided are a process for producing catalyst for ethylene polymerization, capable of producing an ethylene polymer with a low content of low molecular weight component, and a process for producing such an ethylene polymer. CONSTITUTION: The process for producing the catalyst comprises the step of contacting with one another (i) a solid catalyst component containing at least one components titanium, magnesium, and halogen atoms, (ii) an organoaluminum compound, and (iii) a heterocyclic compound. The process for producing the ethylene polymer comprises the step of polymerizing an ethylene, or an ethylene and at least one kind of an addition polymerizable comonomer other than ethylene, in the presence of the obtained catalyst.
Patent KR-20020076570-A (KR)
Title: Washing machine
Inventor: JANG HUN
IPC: D06F23/00
Filed: 2001-03-29
Abstract: PURPOSE: A washing machine is provided to increase the friction force between a spiral element and clothing for smoothing the flow and overthrow of the clothing in the washing and rinsing modes, thereby effectively preventing the tangling and twisting of the clothing. CONSTITUTION: A washing machine includes a pulsator rotatably coupled at a lower part of a washing/dehydrating tub, a spiral element(33) rotatably coupled in the center of a top surface of the pulsator via a one-way bearing, a wing(34) spirally formed on an outer peripheral surface of the spiral element, and concave and convex parts(34a,34b) formed on both sides of the wing for preventing the sliding of clothing.
Patent KR-20010098499-A (KR)
Title: 랙피니언형 요동액츄에이터
IPC: F16H19/00
Filed: 2001-04-11
Abstract: 랙과 피니언이 각각 톱니부의 양측에 평면으로 이루어진 스토퍼를 갖고 있고, 상기 랙의 왕복 양 스트로크단에서, 상기 피니언의 스토퍼가 랙의 스토퍼에 접촉함으로써 백래시가 흡수된다.
Patent KR-20020079281-A (KR)
Inventor: BAE BONG UK
IPC: B65F5/00
Filed: 2001-04-14
Abstract: PURPOSE: A waste discharge system is provided to promote a clean exterior environment, to prevent the leakage of odors from sewage, dregs and chemicals, and to maintain a pleasant interior environment. CONSTITUTION: A waste discharge system comprises a zigzag-shaped discharge duct, doors(2), a sliding hole(4), and a waste gutter(3). The wastes from respective houses and offices are put into the open doors. The wastes are discharged while the speed is reduced due to the zigzag shape. The wastes are stacked on the waste gutter by sliding. The waste discharge system is installed outside a building. Thus, the pollution around the building is avoided.
Patent KR-20020080960-A (KR)
Title: a system conveyer of drive magnetism
Inventor: KIM MYEONG YEOL
IPC: B65G13/00
Filed: 2001-04-18
Abstract: PURPOSE: A magnetic conveyor system is provided to reduce vibration and noise by rotating a roller by the magnetism generated from many drive magnets, to prevent the generation of dust by avoiding friction, and to prevent defects in a semiconductor chip and the industrial disease of the workers in a production line. CONSTITUTION: A magnetic conveyor system comprises two synthetic resin rollers(12) for easily transferring articles(11), bearings(13) fitted to both ends of a roller shaft(10), a rotating magnet(14) for rotating the roller shaft, and a drive magnet(17) for rotating the rotating magnet. The drive magnet and the rotating magnet are installed in the bevel gear shape. The roller are rotated by rotating a drive shaft(16) installed in one side of the rotating magnets.
Patent KR-20020083020-A (KR)
Title: device for removing static electricity of dust-envelope for cyclone type dust collector
Inventor: YOON JU HAN
IPC: A47L9/16
Filed: 2001-04-25
Abstract: PURPOSE: An apparatus for removing a static electricity of a dust collecting barrel is provided to enhance an antistatic property of the dust collecting barrel while having an advantage of a transparency and a low cost feature of the dust collecting barrel by providing an electrical conductivity at a cyclone body. CONSTITUTION: A static electricity removing apparatus comprises a dust collecting barrel(30), an inner and outer coating member(51,52), and an electrical discharge inducing device. The dust collecting barrel has an electrical conductivity, and is transparent for discriminating an amount of the collected waste. The inner and outer coating member(51,52) composed of transparent materials to be charged in an opposite polarity each other is coated at the inside and the outside of the barrel. The electrical discharge inducing device removes a static electricity by generating an electrical discharge between the inner coating member and the outer coating member.
Patent KR-20010104628-A (KR)
Title: 호출 제어 유지 방법, 시스템 및 장치
IPC: H04M3/00
Filed: 2001-04-25
Abstract: 본 발명의 장치, 방법 및 시스템의 실시예는 게이트웨이 이동 스위칭 센터(MSC)에서 ATM 링크 같은 패킷 네트워크 혹은 링크를 이용하여 로밍 이동 장치에 관한 호출 제어를 유지하게 한다.  바람직한 시스템의 실시예는 게이트웨이 MSC, 서빙 MSC 및 로밍 이동 장치와의 무선 링크를 갖는 기지국을 포함한다.  게이트웨이 MSC는 음성용 프로토콜 처리기(PHV)를 포함한다.  임의의 주어진 로밍 이동 장치에 관한 입력 호출 혹은 로밍 이동 장치로부터의 출력 호출에 대해, 게이트웨이 MSC는 데이터 링크 연결 식별자(DLCI)로 지칭되는 특정한 어드레스(혹은 채널)를 PHV에 지정하는데, 이는 기지국과 서빙 MSC를 통해 로밍 이동 장치로부터 수신되어질 음성 패킷에 대한 어드레스로 사용하기 위함이며, 기지국은 또한 기지국 패킷 어드레스를 게이트웨이 MSC에 제공하는데, 이는 게이트웨이 MSC로부터 수신(서빙 MSC를 통해)되어질 로밍 이동 장치에 관한 음성 데이터 패킷에 대한 어드레스로 사용하기 위함으로, 완전한 2중 패킷 링크를 생성한다.  패킷 링크는 게이트웨이 MSC를 통해 라우팅되는 모든 로밍 이동 장치로의 통신과 로밍 이동 장치로부터의 통신을 위해 기지국, 서빙 MSC 및 게이트웨이 MSC 사이에서 음성 경로로서 역할한다.  그런 식으로, 게이트웨이 MSC는 호출 대기 및 3방향 호출 같은 개선된 호출 특성을 구현하기 위해 로밍 이동 장치에 관한 모든 호출 제어를 유지한다.  바람직한 실시예에 있어서, DLCI는 ANSI-41 호환 메시지에 대한 새로운 파라미터로서 포함된다.  또한, 새로운 ANSI-41 호환 메시지가 이용되는데, 게이트웨이 오리지네이션 요청은 기지국 패킷 어드레스를 보유하고 게이트웨이 발신지 요청 복귀 결과는 새로운 DLCI 파라미터를 보유한다.
Patent KR-20020085325-A (KR)
Title: wheelchair for steps
Inventor: KIM JEE HYOUNG
IPC: A61G5/06
Filed: 2001-05-08
Abstract: PURPOSE: A wheel chair usable on stairs is provided to enable a user to easily go up and down the stairs by oneself and to reduce the generation of noise and a whole weight thereof. CONSTITUTION: The wheel chair is constructed to be able to smoothly go up and down the stairs by using a plurality of circular motion rods(1) which extends over two or three stairs in parallel to a slope of the stairs. The rods are connected with vertical bars(2) extending downward from each rod and horizontal bars(3) connecting the vertical bars.
Patent KR-20010105174-A (KR)
Title: 화상 데이터 생성 방법 및 그것을 이용한 초음파진단장치
IPC: G01H9/00
Filed: 2001-05-11
Abstract: 송신부에서 피검체로 빔을 송신하고 다수의 센서를 가지는 2차원 센서 어레이를 이용해 피검체에서 반사된 빔을 검출하여 3차원 화상 데이터를 생성하는 방법은, (a) 송신 후에 일정 기간동안 다수의 센서에 의해 얻어진 검출신호를 연속적으로 저장하는 단계; (b) 송신 수단으로부터 하나 이상의 측정 포인트에 걸친 어느 하나 이상의 센서까지의 거리와 피검체를 통과하는 빔의 송신속도 사이의 관계에서 얻어진 시간 포인트에서, 어느 하나 이상의 센서로부터의 검출신호 출력에 기초하여, 피검체에 포함된 하나 이상의 측정 포인트에 대한 화상 데이터를 얻는 단계; 및 (c) 시간 포인트를 변화시키면서 단계 (b)를 반복하여 화상 데이터를 얻는 단계를 포함한다.
Patent KR-20020088018-A (KR)
Title: System for Carrying Coffin in Crematory
Inventor: PARK CHEOL HONG
IPC: A61G21/00
Filed: 2001-05-16
Abstract: PURPOSE: A coffin carrying system is provided to achieve improved safety and convenience and reduce costs by eliminating the necessity of lifting up heavy coffin during overall coffin carrying procedure. CONSTITUTION: A coffin carrying system(1) comprises a carrying truck(100) including a lower truck and an upper truck loaded with a coffin and disposed onto the lower truck in such a manner that the upper truck is movable in a horizontal direction, wherein the carrying truck receives the coffin from a funeral car(2) and carries the received coffin; a relay truck(200) including an accommodation unit for accommodating the upper truck loaded with the coffin, and a lift for lifting the coffin from the upper truck and loading the coffin, wherein the relay truck receives the upper truck loaded with the coffin from the carrying truck and carries the upper truck; and an in-incinerator truck(300) accommodated in the accommodation unit of the relay truck, loaded with the coffin, and injected into an incinerator(7) such that the coffin is incinerated.
Patent KR-20010107633-A (KR)
Title: 전해 도금 장치 및 전해 도금 방법
IPC: H01L21/288
Filed: 2001-05-22
Abstract: 전해 도금 장치는, 양극과, 이것과 실질적으로 면 대 면으로 또한 평행하게 대향하여 설치된 의사 음극 사이에 전해질을 채워 전류를 공급함으로써, 피처리 기판에의 도금 정지 기간에 있어서의 블랙 필름의 변질을 억제한다.  특히, 양극에의 전류 인가를 피처리 기판에의 도금을 재개하기 직전에 행함으로써, 피처리 기판에의 도금 성막 특성을 최대한으로 안정화할 수 있어, 전력의 소비, 양극의 용해를 억제할 수 있다.  본 장치는 블랙 필름의 형성이 현저한 구리 도금에 있어서 특히 효과적이다.
Patent KR-20010110650-A (KR)
Title: 기판처리장치 및 기판처리방법
IPC: H01L21/00
Filed: 2001-05-31
Abstract: 기판(G)에 대하여 소정의 처리를 행하기 위한 처리장치(100)는, 복수의 공정으로 구성되는 일련(一連)의 제 1의 처리를 행하기 위한 복수의 처리유니트를 갖추는 제 1 처리유니트군(2a)과, 복수의 공정으로 구성되는 일련의 제 2 처리를 행하기 위한 복수의 처리유니트를 갖추는 제 2 처리유니트군(2b)과, 제 1 및 제 2 처리유니트군(2a, 2b)의 각 처리유니트에 대한 기판의 반송을 행하는 공통의 반송수단(42, 44, 46, 48, 50)을 구비한다.
Patent KR-20020094762-A (KR)
Title: Telecommunication Management Network System Using CORBA Interface And Interface Implimentation Method In That System
Inventor: LEE JONG RIM
IPC: H04L12/24
Filed: 2001-06-13
Abstract: PURPOSE: A network management system using a CORBA(Common Object Request Broker Architecture) interface and an interface embodying method thereof are provided to simultaneously mount agents about a plurality of switch systems on one agent workstation by distributing a CORBA interface structure between a TMN(Telecommunication Management Network) agent and a switch system into a message conversion function dependent on the switch system and an interface with an independent agent. CONSTITUTION: A CORBA interface is embodied as managed objects for converting a CMIP(Common Management Information Protocol) message of an agent into a system interface command of a switch system(50) or converting the system interface command of the switch system(50) into the CMIP message of the agent. The agent and the switch system(50) are composed by one to many. The CORBA interface has a CORBA function client(41) for being mounted on the agent side, performing an interface function with an agent independent on the switch system(50), and generating a configuration file necessary for the initialization of the agent. The CORBA interface has a CORBA server(42) for being mounted on an HMI(Human Machine Interface) workstation, performing a CASS(Connector for TMN Agent and ATM Switching System) function dependent on the switch system(50) for converting the request of a CMIP manager into a command capable of being performed in the switch system(50) or performing its inverse conversion.
Patent KR-20020095310-A (KR)
Title: Multimedia monitor having a plate speaker
Inventor: JUN CHANG UK
IPC: G06F1/16
Filed: 2001-06-14
Abstract: PURPOSE: A multimedia monitor is provided to attach a flat speaker, also having a function of a screen filter, at a fixture bracket installed at a front face so that it can widen a space near the monitor and reduce an assembly cost. CONSTITUTION: The apparatus comprises fixture pieces(16), assembly holes, a fixture bracket, a screen filter(26), assembly holes, elastic assembly wires(28), a plurality of assembly sponges(36), and a flat speaker(34). The fixture pieces(16) are formed on either end on a top of the monitor. The assembly holes, traversing the fixture pieces, are perforated (16). The screen filter, assembled on the fixture bracket, has the same rectangular shape with the screen of the monitor and filters harmful electronic waves radiated from the screen. The assembly holes are formed on either end on a top of the fixture bracket, and the elastic assembly wires(28) are inserted into the assembly holes for fixing the bracket at the monitor. The sponges(36) are equidistantly attached on the bracket for laying the flat speaker(34) and the screen filter(26) on the bracket.
Patent KR-20020052921-A (KR)
Title: Optical recording medium formed with wobbled header area, apparatus and method for recording data thereon
Inventor: JUN JIN HUN
IPC: G11B7/128
Filed: 2001-06-14
Abstract: PURPOSE: An optical recording medium having a wobble header area and a device and a method for recording data thereof are provided to make geometry of the header area more uniform, so as to prevent the reduction of reflective lightness upon recording, and to lower recording power for the header area when recording user data on the optical recording medium, so as to prevent the deterioration of the header area. CONSTITUTION: A single wobble signal having a single frequency is recorded in a groove track and a land track. An over-writable phase change layer is formed on the groove track and land track, thereby displaying a mark through the phase change when user data are recorded. A track is formed in a header area consecutively to the groove track and land track of an adjacent user data area, and a wobble header signal including header information is recorded in the track. For classification, the groove track and land track arranged in the user data area are called a wobble track, and the track formed in the header area is called a wobble header track. As the wobble header signal recorded in the wobble header track includes various header information, the wobble header signal is a signal having a higher frequency in comparison with a wobble signal recorded in the wobble track.
Patent KR-20010090612-A (KR)
Inventor: KIM SUN GU
IPC: H04B7/26
Filed: 2001-06-25
Abstract: PURPOSE: An integrated CDMA(Code Division Multiple Access) hard handoff device is provided to actively cope with a time delay that is problematic in a base station with a repeater by setting the time delay in 0.8138 micrometer unit in a baseband pilot signal source. CONSTITUTION: A controller(180) controls a system. A pilot generator(100) receives synchronizing signals, QPSK(Quadrature Phase Shift Keying) modulates and outputs. An IF(Intermediate Frequency) generator(200) receives an RF(Radio Frequency) signal and outputs an IF signal. The first switching part(110) receives the synchronizing signals and RF signal output from a base station and switch a downconverted IF signal. The first amplifying part(112) receives and amplifies the signals switched in the first switching part(110). The second attenuator(114) variably attenuates 70MHz of IF signal within 30 dB range under the control of the controller(180). The first band pass filter(116) receives the attenuated signal and passes only a certain band of signal. The second amplifying part(118) receives and amplifies the signal from the first band pass filter(116). A divider(119) receives and divides the signal output from the second amplifying part(118). An RF signal generator(120) outputs a time division periodic RF signal and a time division non-periodic RF signal by controller(180). A combiner(150) receives the time division periodic RF signal and the time division non-periodic RF signal from the RF signal generator(120) and combines them.
Patent KR-20030000999-A (KR)
Title: A continuous oxidation process for the regio-selective oxidation of primary alcohol groups in chitin and chitosan
Inventor: CHANG PAHN SHICK
IPC: C08B37/08
Filed: 2001-06-28
Abstract: PURPOSE: A method for oxidizing chitin or chitosan is provided, to oxidize only the primary alcohol groups within chitin or chitosan selectively to improve the water-solubility of chitin and chitosan with maintaining the polymer structure of chitin and chitosan. CONSTITUTION: The method comprises the steps of reacting chitin or chitosan with TEMPO (2,2,6,6-tetramethyl-1-piperidine oxoammonium), sodium bromide and sodium hypochlorite at a temperature of 0-50 deg.C and at a pressure of 1 atm to oxidize only the primary alcohol groups within chitin or chitosan into the carboxyl groups; adding chitin or chitosan and sodium hypochlorite by the equal mol ratio and to carry out the second oxidation; and repeating the previous oxidation process for 20-25 times continuously. Preferably the oxidation process is carried out at pH 9-12.
Patent KR-20030003375-A (KR)
Inventor: KIM HYEONG GI
IPC: H01L21/8239
Filed: 2001-06-30
Abstract: PURPOSE: A magnetic ram cell and a method for manufacturing the same are provided to prevent a shot channel effect, improve current driving, and be capable of perform a low voltage driving. CONSTITUTION: The magnetic ram cell comprises a SOI substrate including a silicon substrate(11), a buried oxide layer(13) and a silicon layer(17), a gate electrode formed on the silicon layer, and a source/drain region(35a,35b) having smaller junction capacitance than that of a conventional semiconductor substrate.
Patent KR-20010083816-A (KR)
Inventor: PARK DAE SEO
Filed: 2001-06-30
Abstract: PURPOSE: An accounting method being managed on the Internet for selling long-term stored goods rapidly is provided to apply a normal fixed selling price for a predetermined period and to apply different prices in accordance with the stored time after the predetermined period by managing stored goods information according to commodities in real time. CONSTITUTION: Selling prices according to commodities are set differently by applying a selling price of the oldest commodity to a selling prime cost based on a long term stored goods classification standard and by applying selling prices of the other commodities to a price adding the selling prime cost to a storing cost compared to the oldest commodity through a periodical stored goods analysis. A computing software is provided for calculating the selling prices according to the stored goods. Thus, a selling promotion is expected.
Patent KR-20030004601-A (KR)
Title: Apparatus for connecting a distributing chute
Inventor: KIM CHA JIN
IPC: C21B7/20
Filed: 2001-07-05
Abstract: PURPOSE: A coupling device of distribution chute is provided to easily perform replacement operation of the distribution chute by accurately grasping position where a newly replaced distribution chute is coupled to a drive unit. CONSTITUTION: In a device for coupling a distribution chute which is installed inside a blast furnace to charge raw materials to a drive unit part, the coupling device of the distribution chute comprises a guide arm(10) which is mounted on the side direction of a jig(80) transferred with the distribution chute(50) being rested on the jig(80); and a guide stopper(20) which is arranged on a manhole flange(30) formed on the outer side of the blast furnace(1) and formed in a shape for receiving the guide arm(10), wherein the guide arm(10) is received in the guide stopper(20) so that the distribution chute(50) is coupled to the drive unit part at a position where the jig(80) can not be proceeded any more.
Patent KR-20030005538-A (KR)
Title: Method for manufacturing a cake using olive oil or sunflower oil
Inventor: KIM BOK SUN
IPC: A23G3/00
Filed: 2001-07-09
Abstract: PURPOSE: Provided is a method for manufacturing Yak-gwa(fried honey cakes) using olive oil or natural edible sunflower oil. The manufactured Yak-gwa has savory and crispy tastes and is abundant in nutrients. CONSTITUTION: The composition of Yak-gwa is characterized by comprising 30.50-36.50 wt.% of wheat flour, 28-33 wt.% of sugar syrup, 5-15 wt.% of olive oil or natural edible sunflower oil, 13-18wt.% of refined sugars, 0.35-0.50 wt.% of refined salts, 0.02-0.04wt.% of sodium bicarbonate(baking soda), 0.30-0.50 wt.% of cinnamon, 0.01-0.03 wt.% of vanillin and 6.50-8.50 wt% of glutinous rice.
Patent KR-20030008472-A (KR)
Title: a power transmission system of washer
Inventor: HUH CHI WAN
IPC: D06F37/30
Filed: 2001-07-18
Abstract: PURPOSE: A power transmission system of a washing machine is provided to prevent a belt from deviating from a pulsator pulley by protrusion ribs formed on the upper and lower parts of the pulsator pulley, even when a motor rotates at a high speed in the situation that the position of a washing tub is changed. CONSTITUTION: A power transmission system of a washing machine includes a pulsator pulley(58a) mounted to a rotation shaft of a pulsator mounted on a bottom surface of a washing tub for forming a water stream to increase the washing efficiency, a motor pulley mounted to a rotation shaft of a motor which supplies driving force to the pulsator, a belt(62) suspended to the motor pulley and the pulsator pulley for transmitting the rotation force of the motor to the pulsator after speed reduction, and belt deviation preventing parts(70a) formed on the pulsator pulley for preventing the deviation of the belt from the pulsator pulley when the position of the pulsator pulley is changed.
Patent KR-20030013859-A (KR)
Inventor: KIM DONG HWAN
IPC: E01F9/06
Filed: 2001-08-09
Abstract: PURPOSE: A road stud is provided to reduce the time required for construction and to recycle easily with eco-friendliness. CONSTITUTION: The road stud comprises: an indicator(10) exposed to the road surface to indicate a traffic lane; an anchor(20) extended from the lower part of the indicator(10) and interposed in an inner anchor insertion hole of the road surface; and an elastic member(30) provided with a coupling part coupled to a stepped part of the anchor(20) and an elastic hanger part placed closely to the side of the anchor(20).
Patent KR-20010099173-A (KR)
Title: 편광필름 부착기
Inventor: NAM SEONG GUK
IPC: G02F1/1335
Filed: 2001-09-08
Abstract: 본 발명은 편광필름 부착기에 관한 것으로, 종래의 소형패널에 편광필름을 부착시키고자 할 때에는 수작업으로 작업을 진행해야 하므로 작업 시간이 많이 소요되고, 작업능률이 저하되어 생산성이 떨어지게 되며, 작업불량이 다발하여 제작단가의 상승을 초래하게 되는 등의 많은 문제점이 있었던 바, 본 발명은 편광필름 부착기를 사용하여 휴대폰 등의 소형 디스플레이창에 사용되는 LCD 및 유가EL용 소형패널에 편광필름을 자동으로 부착시킴으로서, 작업시간의 단축과 아울러 작업능률의 향상에 의한 생산성을 크게 증대시킬 수 있으며, 작업불량의 발생을 대폭 줄여 제작단가를 절감시킬 수 있게 된다.
Patent KR-20030027204-A (KR)
Title: Apparatus for thin film transistor liquid crystal display
Inventor: LEE GYEONG HA
IPC: G02F1/1343
Filed: 2001-09-14
Abstract: PURPOSE: A thin film transistor liquid crystal device is provided to reduce effect of DC components by removing ununiformity of an electric field at the most external part of a screen and securing symmetry of the electric field, thereby improving the image quality. CONSTITUTION: A thin film transistor liquid crystal device includes a red pixel part(R) which is the most external pixel part is formed of a pixel electrode(400a), a data line(200a) arranged on one side of the pixel electrode, gate lines(100) crossing the data line at right angles, a common line(300) overlapped with the pixel electrode. A dummy pixel part is formed on the other side of the red pixel part. The dummy pixel part includes a dummy pixel electrode(500) and a dummy line formed on one side of the dummy pixel electrode. The red pixel part forms a symmetrical electric field by the gate lines, the data line, and the dummy line.