baber/WOPTO huggingface dataset:
Patent KR-20020054128-A (KR)
Title: Shift fork assembly of vehicle
Inventor: HONG HAN GI
IPC: F16H63/32
Filed: 2000-12-27
Abstract: PURPOSE: A shift fork assembly for a car is provided to improve a sense of gear shift by always contacting at a right angle between a shift fork and a synchronizer sleeve, to reduce shift operation force, and to remove a sense of locking. CONSTITUTION: A shift fork assembly for a car includes a shift rail(2), a shift fork(4), and a fastening pin(6). The shift rail is connected with a shift lever by a cable, reciprocates in a straight line according to operation of the shift lever, and is mounted at a side of a transmission. The shift fork is fixed at a side of the shift rail, moves in a straight line like the shift rail, and performs a synchronization action by moving a sleeve of a synchronizer. The fastening pin is mounted between the shift fork and the shift rail. The fastening pin has a section in the form of a polygon to prevent inclination of the shift fork when the shift rail moves in the straight line.
Patent KR-20020053677-A (KR)
Title: Transmitting/receiving apparatus and method for packet data service in a mobile telecommunication system
Inventor: CHO YEONG GWON
IPC: H04B1/707
Filed: 2000-12-27
Abstract: PURPOSE: A transmit-receive apparatus and method for packet data service in a mobile system is provided to present a forward link transmitter and a reverse link transmitter for an efficient packet data service in a mobile system capable of supporting voice service and data service and to offer a method to transmit signals using them. CONSTITUTION: In case that a call is being transmitted to a specific user's mobile station, a base station sets a time index(m) to '0'(202). Every time that an index corresponding to a transfer rate requested from the mobile station is received, the base station adds '1' to the time index(m)(203). Then the base station checks whether the time index(m) is more than a preset value(N)(204). In case that the time index(m) is larger than or equal to the preset value(N), the base station digitalizes and calculates a variation history for the transfer rates requested from the mobile station(205). Then the base station checks whether a new physical layer packet is to be transmitted(206). In case that the transmission of a new physical layer packet is needed, the base station compares the digitalized and calculated value(α) with a preset threshold(θ)(207). If the value(α) is smaller than the preset threshold(θ), the base station checks whether enough information data to configure a double format physical layer packet remain in a buffer(208). If sufficient information data exists in the buffer, the base station configures a relevant double format physical layer packet and starts data transmission(209).
Patent KR-20020054894-A (KR)
Title: Method for fabricating CMOS device
Inventor: RYU JEONG HO
IPC: H01L29/78
Filed: 2000-12-28
Abstract: PURPOSE: A method for manufacturing a CMOS(Complementary Metal Oxide Semiconductor) device is provided to enhance the characteristic of each PMOS and NMOS device including to the CMOS device with a small number of processes. CONSTITUTION: An n-well(205) to form the PMOS is formed on a part of a p-type semiconductor substrate(200). An N-type first impurity area of the first concentration is formed on both sides of a gate pattern by the ion implantation. The n-type second impurity area of the second concentration is formed on the first impurity area by the ion implantation. After removing the first photoresist pattern, the substrate is heat-treated. A p-type third impurity area(250) of the third concentration is formed on the second area by the ion implantation. The p-type fourth impurity area(260) of the fourth concentration is formed on the third impurity area by the ion implantation. After removing the second photoresist pattern(PR2), the substrate is heat-treated. The second source/drain area and the second electrode are formed by driving in the injected impurities.
Patent KR-20010025493-A (KR)
Title: Garbage auto breaker
Inventor: UM WAN YOUNG
IPC: B09B5/00
Filed: 2000-12-29
Abstract: PURPOSE: An automatic weight reducing machine for food waste is provided to reduce the weight of food waste by 45-95% with low noise and vibration through pulverizing, dehydrating, drying and discharging steps and prevent drainage pipes from being clogged and water from being polluted by collecting food sludgy. CONSTITUTION: An automatic weight reducing machine for food waste includes an automatic hopper type supplying unit(1-14) for inserting food waste, a water supplying unit, a pulverizing unit(23-25,31,37) connected to a discharge hole nozzle flange at a lower part of the hopper unit and pulverizing the supplied food waste, a dehydrating unit(57-61) connected to a discharge hole nozzle flange(30) at a lower part of the pulverizing unit and discharging sewage via a water discharge hole, a cleaning unit(65,71) fixed outside an upper part of the water discharge hole of the dehydration unit and connected to a water supply pipe for cleaning the inside of the hopper unit, a drying unit, an exhausting unit, an automatic dehydration control unit for controlling a dehydration state with an automatic control plate, a discharging unit, a purifying unit for collecting food sludgy contained in the sewage, a frame unit, a safety unit, and a control unit.
Patent KR-20010022033-A (KR)
Title: 가축의 유선염 치료방법
IPC: A61P31/04
Filed: 1998-07-29
Abstract: 치료가 필요한 가축의 유선염을 치료하는 방법은 다음 화학식(I)의 리파마이신 유도체나 이들의 생리학적 수용가능한 염, 또한 생리학적 수용가능한 담체를 포함하는 약제학적 조성물을 동물에 투여하는 것이다: 
     
       
     
     여기서, R은 1 내지 7개의 탄소를 가진 알킬기이다. 
     또한 본 발명은 상기한 리파마이신 유도체를 포함하는 가축 유선염 치료제 혹은 이러한 유도체를 상기 치료제 제조에 사용하는 방법을 제공한다.
Patent KR-20010023587-A (KR)
Title: 틸트 및 고우 하중 포트 인터페이스 정렬 시스템
IPC: H01L21/677
Filed: 1998-09-03
Abstract: 하중 포트 인터페이스 어셈블리의 부분으로서 포함된 틸트 및 고우 어셈블리는 볼츠 인터페이스에 하중 포트 인터페이스 어셈블리의 빠르고 쉬운 부착 및 조절을 하기 위하여 개시되어 잇다. 본 발명에 의한 하중 포트 어셈블리가 볼츠 인터페이스에 인접하여 위치될 때, 상기 어셈블리는 상기 볼츠 인터페이스로부터 이탈아혀 기울어지는데, 이는, 상기 하중 포트 인터페이스 어셈블리내의 소켓이 약간 상향으로 올라서서 상기 볼 조인트에 안착되기 위한 것이다. 이후, 상기 하중 포트 인터페이스 어셈블리의 상부 부분들이 기울어질 수 있는데, 이는 상기 어셈블리가 상기 볼츠 인터페이스에 대략 평행하여 인접하기 위한 것이다. 일단 상기 하중 포트 인터페이스 어셈블리가 상기 볼츠 인터페이스의 볼 조인트상에 안착되면, 상기 하중 포트 인터페이스 어셈블리의 수직 및 측면 위치들은 상기 볼츠 인터페이스에 대해서 원하는데로 조절될 수 있다. 추가로, 상기 하중 포트 인터페이스 어셈블리의 수직 및 측면 위치들이 조절된 후, 상기 하중 포트 인터페이스 어셈블리의 방위 및 롤각은 상기 볼츠 인터페이스에 대해서 조절될 수 있다.
Patent KR-20010023622-A (KR)
Title: 반도체 장치 및 그 제조 방법
IPC: H01L23/485
Filed: 1998-06-12
Abstract: 집적 회로를 형성한 반도체 소자와, 상기 반도체 소자의 집적 회로 형성면측에 형성된 복수의 전극 패드와, 상기 전극 패드에 도체층을 통해 전기적으로 접속된 외부 접속용 범프 전극과, 상기 집적 회로 형성면 및 상기 전극 패드와, 상기 범프 전극 및 상기 도체층사이에 형성되고, 이들에 접착된 응력 완화층을 지니고, 상기 응력 완화층의 표면으로부터 3분의 1이상 절제되어, 상기 응력 완화층은 복수의 영역으로 분할되어 있는 반도체 장치 및 그 제조 방법.  본 발명에 따르면, 신뢰성에 우수하고, 고밀도 실장이 가능한 반도체 장치를 저비용으로 제공할 수 있다.
Patent KR-20010031254-A (KR)
Title: 가스의 플라즈마 처리 장치
IPC: F01N3/08
Filed: 1998-10-09
Abstract: 본 발명은 플라즈마로 가스 매체를 처리하기 위한 장치(1)에 관한 것으로, 운모 함유 유리 재료로 제조된 하나 이상의 절연 지지구조(7, 8)에 의해 나머지 하나에 대해 적소에서 유지되는 하나 이상의 전극(6, 14)을 포함하고 있다.
Patent KR-20010024787-A (KR)
Title: 유전성 유체로 함침된 절연 시스템을 갖는 전기 장치를제조하는 방법
IPC: H01G4/30
Filed: 1998-12-15
Abstract: 유전성 유체로 함침된 고체상의 전기 절연부를 포함한 다공질, 섬유상 및/또는 적층된 전기 절연 유전체 시스템 및 적어도 하나의 도체를 갖는 전기 장치의 제조 방법 및 상기 방법으로 제조된 전기 장치에서 이용하기 위한 다공질, 섬유상 및/또는 적층된 형체.     상기 방법은,  서로 결합된 고체상의 전기 절연 재료의 다공질, 섬유상 및/또는 적층된 구조 및 도체를 제공하는 단계,  상기 다공질, 섬유상 및/또는 적층된 형체를 겔화 첨가물로 전처리하여,  상기 장치가 동작하도록 설계된 조건에서 상기 유체에 높은 점탄성을 주는 상기 겔화 첨가물을 상기 형체가 포함하는 단계,  상기 겔화 첨가물을 포함한 전처리된 형체를 상기 유전성 유체로 함침하는 단계를 포함하고,  함침시 상기 겔화 첨가물이 상기 유전성 유체와 접촉하게 되고,  상기 겔화 첨가물은 적어도 부분이나마 상기 유체에 의해 용해되어,  상기 함침 이후에는 상기 유전성 유체가 겔 상태로 된다.
Patent KR-20010033609-A (KR)
IPC: C07D491/048
Filed: 1998-12-22
Abstract: This invention creates compounds represented by the following formula (1) which, alone or as a plurality of them simultaneously, act upon serotonin receptors, and thereby provides pharmaceutical compositions that contain these compounds and are useful for the treatment or prevention of diseases which are considered to be induced by the abnormality of central and peripheral serotonin controlling functions. <CHEM>   In the formula, R<1> is a hydrogen atom, a lower alkyl group or an aralkyl group; R<2> is a hydrogen atom or a specified substituent; n is an integer of 2 to 6; and  alpha  is the following formula (a), (b), (c), (d) or (e). <CHEM>   In formulae (a) and (b), R<3> is a hydrogen atom or a specified substituent; X is NR<10>, NCONR<11>R<12>, S, SO, SO2 or O; R<10> is a hydrogen atom or a specified substituent; R<11> and R<12> is independently a hydrogen atom or a lower alkyl; Y is a methylene group or a carbonyl group. In formula (c), R<4> is a hydrogen atom or a specified substituent; R<5> is a hydrogen atom or a specified substituent; k is 0 or an integer of 1 to 3; m is 0 or an integer of 1 to 3; each of A and B is a group which forms a specified ring via a double bond; k + m is an integer of 1 to 3. In formulae (d) and (e), R<4> is as defined above; G is CH2, S, O or C=O; D is CH or N; p is an integer of 1 to 3; each of E and J is a group which forms a benzene ring or a pyridine ring via a double bond; R<6> and R<7> is independently a hydrogen atom or a lower alkyl or the like specified substituent.
Patent KR-20010042540-A (KR)
Title: 씨디엠에이 이동통신시스템에서 이동단말기의 위치를결정하는 방법과 시스템
IPC: H04W64/00
Filed: 1999-04-06
Abstract: CDMA 셀룰러 시스템에서 이동국(120)의위치를 결정하는 방법과 시스템이 기술되는 바, 이동국(120)이 전송하게 되는 각 심볼(S 1 )은 먼저 쇼트코드로 확산되고, 최종신호는 롱코드로 더 확산된다. 확산코드(C 1 )는 N-칩 섹션으로 분할된다. 따라서, 전송된 심볼들을 알 수 없더라도, 최종신호의 N-칩 섹션들은(미지의 위상차 내에까지) 알 수있다. 그런 다음, 이동국(120)은 최종 확산신호를 전송한다. 수신하는 기지국에서, 수신된 확산신호는 공지 코드들로 상관(및 역확산)되어, 최초 데이터가 재현된다. 이와 같이, 수신신호의 타이밍은 상기 미지 위상차의 시간간격의 정확성으로 결정할 수 있다.
Patent KR-20010053115-A (KR)
Title: 퀴놀린 유도체
Inventor: BJORK ANDERS
IPC: C07D491/056
Filed: 1999-07-14
Abstract: 본 발명은 일반식(I)의 신규한 화합물과 및 이의 토토머에 관한 것이다: 
     
       
     
     상기 식에서, 
     R은 메틸, 에틸, n-프로필, 아이소-프로필, n-부틸, 및 알릴로 이루어지는 군으로부터 선택되며; 
     R'는 메틸, 메톡시, 플루오로, 클로로, 브로모, 트리플루오로메틸, 및 OCH x F y 로 이루어지는 군으로부터 선택되고―여기서 x = 0 - 2이고, y = 1 - 3이며, 이때 x+y = 3임―; 
     R"는 수소, 플루오로로, 및 클로로로 이루어지는 군으로부터 선택되며―여기서 R'이 플루오로 또는 클로로로부터 선택되는 경우에 한하여 R"도 플루오로 또는 클로로로부터 선택됨―; 
     R 4 는 수소, 약리학적으로 허용 가능한 무기 양이온, 및 유기 양이온으로 이루어지는 군으로부터 선택되고; 
     R 5 는 에틸, n-프로필, 아이소-프로필, 메톡시, 에톡시, 클로로, 브로모, 트리플루오로메틸, OCH x F y , 및 OCH 2 CH x F y 로 이루어지는 군으로부터 선택되며―여기서 x = 0 - 2이고, y = 1 - 3이며, 이때 x+y = 3임―; 
     R 6 은 수소이거나, 또는 
     R 5 및 R 6 은 함께 메틸렌다이옥시임. 
     본 발명은 또한 일반식(I)의 화합물과 함께 약리학적으로 허용 가능한 담체를 함유하는 약제 조성물 및 일반식(I)의 화합물을 제조하는 방법뿐 아니라, 일반식(I)을 가지는 화합물을 포유류에 투여하여 자가면역증 및 염증성 질환을 가지는 포유류를 치료하는 방법에 관한 것이다.
Patent KR-20020061061-A (KR)
Title: Method for forming a line of semiconductor device
Inventor: KIM SANG GWON
IPC: H01L21/28
Filed: 2001-01-12
Abstract: PURPOSE: A method for manufacturing the wiring of a semiconductor device is provided to increase the contact area of a lower wiring and a vertical plug by extending the surface area of the wiring on the lower part on which there is protruded center part. CONSTITUTION: A conductive film and a reflection barrier film are successively deposited on a silicon substrate(10). After forming a photoresist pattern for the lower wiring on the reflection barrier film, the reflection barrier film and the conductive film exposed by the photoresist pattern are etched to a fixed depth. After removing the photoresist pattern, a spacer is formed to a sidewall of the etched reflection barrier film(14') and conductive film. The lower wiring(12a) on which corner is etched is formed by etching the conductive film aligned to the spacer. An interlayer insulation film(20) is formed on the surface, and a contact hole exposing the surface of the lower wiring and removing the spacer is formed on the interlayer insulation film. The interlayer insulation film having the contact hole is buried by a conductive material and the plug(24) connecting to the lower wiring vertically is formed by flattening the surface.
Patent KR-20010082022-A (KR)
Title: Method and system for remotely configuring a device driver
Inventor: BARRY ATKINS
IPC: G06F13/10
Filed: 2001-01-30
Abstract: PURPOSE: A system for remotely constitution device driver is provided to give a help by a help administrator at a remote place, so that a user can correctly configure a device driver in a user system and using a necessary method. CONSTITUTION: A help administrator(105) obtains options that the user(108a) desires to be set in the selected device driver(107) from the user(108a) and then sets the options that the user desires to the device driver(107), by using its administrator system(102). The device driver(107), having the set options, is packaged into an executable file(202). The executable file(202) is provided, so that the user(108a) can execute it on the user system(106a). The provided executable file(202) automatically configures the device driver(107) with the options set in the user system(106a) which are executed by the user(108a).
Patent KR-20010082753-A (KR)
Title: Cell death inhibitory protein
Inventor: MORISHIMA NOBUHIRO
IPC: C07K14/47
Filed: 2001-02-19
Abstract: PURPOSE: To obtain a protein for inhibiting the activation of caspase-12 and to provide its use. CONSTITUTION: This protein comprises a recombinant protein of the following (a) or (b). (a) A protein comprising a specific amino acid sequence. (b) A protein which comprises an amino acid sequence obtained by deleting, substituting or adding one or several numbers of amino acids to the above specific amino acid sequence and inhibits the activation of caspase-12.
Patent KR-20020068805-A (KR)
Title: A apparatus and method for laminating a film on a paper containor
Inventor: JANG SE JONG
IPC: B29C65/02
Filed: 2001-02-22
Abstract: PURPOSE: An apparatus and a method for laminating a film on a paper vessel are provided to laminate the film on an inner surface of the paper vessel by preliminarily laminating the film on the inner surface of the paper vessel. CONSTITUTION: A laminating apparatus includes a film supplying reel(100), a film winding reel, a paper vessel supplying device, a film conveying device, a heater(400), a receiver cup(410), a laminating press(200), a stamping press(600) and a paper vessel stacking device(700). The film consists of a substrate film and an adhesive layer. The substrate film includes a polyester film or polypropylene film. A film(21) is provided in the film supplying reel(100) in order to continuously perform the laminating work. The film(21) is released from the film supplying reel(100) when a laminating process is carried out by the laminating press(200).
Patent KR-20020027149-A (KR)
Title: Heat-dissipating substrate and semiconductor module
Inventor: IGARASHI YUSUKE
IPC: H01L21/56
Filed: 2001-02-23
Abstract: PURPOSE: Radiation substrate and semiconductor module are provided to radiate excellently the heat from the semiconductor device. CONSTITUTION: A radiation substrate includes a first surface(11) and a second surface(13), both opposed to each other, and containing Al as a major component, wherein a first metal film(14) containing Cu, Ag, Sn, Ni, or Au as major material is formed as an uppermost layer on the first surface. The first metal film consists of a plating film. A metal body provided on a back surface of a semiconductor device is adhered by brazing solder, conductive paste, or adhering material having excellent thermal conductivity.
Patent KR-20010085669-A (KR)
Title: Display device and manufacturing mehtod for the same
Inventor: FUJINO MASAHIRO
IPC: G09F9/30
Filed: 2001-02-27
Abstract: PURPOSE: To prevent unnecessary reflection and coloring by a multilayered film present between a substrate and pixels. CONSTITUTION: The display device has pixels arranged in a matrix on a transparent substrate 1. Each pixel has an opening region where an electro-optic device to emit light through the substrate 1 is formed and a non-opening region where a thin film transistor TFT to drive the electro-optic device is formed. The non-opening region has a first film structure including the thin film transistor TFT. The opening region has a second film structure extended from the first film structure and present between the electro-optic device and the substrate 1. The second film structure is varied from the first film structure so as to control the light passing through the opening region.
Patent KR-20020072383-A (KR)
Title: Portable apparatus for tracking spurious
Inventor: KIM GWI YEONG
IPC: H04B17/00
Filed: 2001-03-09
Abstract: PURPOSE: A portable spurious wave tracking apparatus is provided to be easily carried and moved by being fabricated as a light weight. CONSTITUTION: An RBPF(Receive Band Pass Filter)(200) limits a band of a signal received from an antenna(100). An LNA(Low Noise Amplifier)(300) amplifies the signal through the RBPF(200). A power unit(400) connects to one side of the LNA(300) for supplying a power. The power unit(400) uses a disused portable battery.
Patent KR-20010094966-A (KR)
Title: System, method, and program product for controlling commutation of disk drive motor
Inventor: HEEREN SCOTT EDWIN
IPC: H02P6/14
Filed: 2001-03-10
Abstract: PURPOSE: A system, method, and program product for controlling communication of disk drive motor are provided to consistently and reliably accelerate a motor from a stopped position to the speed at which self-commutation is able to be used. CONSTITUTION: A disk drive includes a motor(102), a spindle(104) driven by the motor, one or more rotatable storage media coupled to the spindle, a motor driver circuit coupled to the motor, and a disk drive controller coupled to the motor driver and other disk drive components. The various components of the disk drive are controlled during operation by signals generated by the disk drive system controller. The disk drive controller provides commutation timing signals to the motor driver that, in turn, drives the motor. During the first part of motor start-up, the disk drive controller selects external commutation of the motor. Commutation values approximating the first portion of the ideal commutation curve are pre-defined and stored as a look-up table into a memory system. Commutation values approximating the second portion are derived from a linear equation having a slope based on an acceleration characteristic of the motor. If the motor fails to reach the critical BEMF speed, the slope is repeatedly decreased, as necessary, and commutation values are re-calculated for this second portion of the commutation curve until the motor is started. Commutation values generated during both portions of the initial start sequence are used to externally control commutation of the motor. After the motor reaches the critical BEMF speed at which the back-electromotive force is high enough for self-commutation to work properly, internal commutation or self-commutation of the motor is used to commutate the motor.
Patent KR-20020073609-A (KR)
Title: Optical pickup
Inventor: OH SANG GEOL
IPC: G11B7/095
Filed: 2001-03-15
Abstract: PURPOSE: An optical pickup device is provided to maintain the verticality of the optical pickup with respect to a disc surface by obtaining tilt information from auxiliary beams generated in the radial direction of the disc. CONSTITUTION: An optical pickup device includes a diffraction grid(402) for projecting incident light beams in the radial direction of a disc(406) by dividing into main beams and auxiliary beams, a light receiving part(403) for receiving the main beams and the auxiliary beams reflected against the disc, and a tilt correcting part for detecting the main beams and the auxiliary beams to detect coma information for obtaining tilt information of the disc for correcting the tilt with reference to the obtained tilt information.
Patent KR-20020073782-A (KR)
Title: A apparatus for identifing telephone number
Inventor: CHOI YEON SEOK
IPC: H04Q3/72
Filed: 2001-03-16
Abstract: PURPOSE: An apparatus for confirming a telephone number is provided to confirm identity a caller using caller identification data when a signal is terminated in a telephone and confirm the caller in a remote place by embedding a caller identification data detector. CONSTITUTION: A caller identification data detector(50) detects caller identification data transmitted from an office installation switch. The first memory unit(15) stores caller information. A display unit(20) is performed so that a user recognizes calling. An Internet connection device(40) connects to the Internet or a wired and wireless communication network. If the user requests information through the Internet connection device(40), a web server module(18) transmits information stored in the first memory unit(15) to the user and judges whether information is static information or dynamic information. If information is static information, a web application module(19) transmits static information to the user. If information is dynamic information, the web application module(19) edits dynamic information as static information and transmits edited static information to the user.
Patent KR-20010093059-A (KR)
Title: Valve driving apparatus
Inventor: HASHIMOTO KATSUO
IPC: F16K11/056
Filed: 2001-03-21
Abstract: PURPOSE: To provide a valve drive eliminating a failure such as liquid leakage caused by damage of an opening, even if a valve element vibrates by receiving vibration of the liquid in a valve element opening state, which often causes the damage of the opening part (part for installing the valve element). CONSTITUTION: This valve drive opens/closes a valve port 7av by closely sticking the spherical valve element 3a to the opening part (valve port 7av) of a valve joint 7a as a fluid channel or by forming a prescribed clearance therebetween. This drive is incorporated with such a structure that, when the valve sphere 3a is in an opening state, the valve sphere 3a goes out of a transfer face 7c formed in the valve port 7av and having a same curvature as the surface curvature of the valve sphere 3a, is positioned in a slope face 7d as a valve element holding part formed in a part continuing from the transfer face 7c to the opening part side, and presses and holds the opened-state valve sphere 3a in the position by a pressing force of a plate part 11 in a plate spring 10.
Patent KR-20010093719-A (KR)
Title: Thin film semiconductor device and the driving method
Inventor: IKEDA HIROYUKI
IPC: G09F9/30
Filed: 2001-03-27
Abstract: PURPOSE: To electrically control the threshold voltage of a thin-film transistor to absorb its variation. CONSTITUTION: The thin-film semiconductor device comprises a thin-film transistor TFT integrated on a substrate 1 and a wiring connecting the TFTs. Each TFT has a specified threshold voltage, and comprises a channel Ch which turns on/off according to a gate voltage applied through the wiring. At least a part of the TFTs comprises a semiconductor thin-film 4 constituting the channel Ch, and first and second gate electrodes 2F and 2R provided on the front and rear surfaces of the semiconductor thin-film 4 through insulating films 3 and 7. The first and second gate electrodes 2F and 2R independently accept first and second gate voltages, respectively, through the wiring provided separately. The first gate electrode 2F on/off-controls the channel Ch according to the first gate voltage, and the second gate electrode 2R actively controls the threshold voltage according to the second gate voltage for appropriate on/off operation of the TFT.