baber/WOPTO huggingface dataset:
Patent KR-20120034442-A (KR)
Title: Steel girder bridge
Inventor: HAN MAN YOP
IPC: E01D21/00
Filed: 2010-10-01
Abstract: PURPOSE: A prestressing steel girder bridge is provided to facilitate maintenance and work for mounting steel wires without using special fixing device and reduce a number of bolts used for connecting steel girders. CONSTITUTION: A prestressing steel girder bridge includes a steel girder assembly and steel wires. The steel girder assemblies are consecutively connected to form the steel girder assembly. Multiple stiffeners(14) are formed in the side of the steel girder. The steel wires are arranged in both sides of the steel girder assembly in longitudinal direction. The steel wire is passed through a steel wire hole(14a) forming in the stiffener to connect the stiffeners under tension.
Patent KR-20110040683-A (KR)
Title: Plasma resistant processing apparatus
Inventor: NOGUCHI TSUYOSHI
IPC: H01L21/205
Filed: 2010-10-04
Abstract: PURPOSE: A plasma resistant processing apparatus is provided to form a protection layer including an elastomer on a partial surface or the entire surface exposed to plasma, thereby preventing deterioration and damage due to plasma wherein the elastomer includes fluoride. CONSTITUTION: A protection layer(13) installed in an edge part is formed by coating a composition for forming a coating film. The composition for forming a coating film includes an elastomer with fluoride and an organic solvent. The elastomer with fluoride includes a filler. A protection layer(14) installed in a micro space is formed by filling a caulking composition. The micro space is formed by O-ring.
Patent KR-20120038203-A (KR)
Title: Image processing apparatus and method having function of image correction based on luminous intensity around
Inventor: LEE SUNG YONG
IPC: H04N5/58
Filed: 2010-10-13
Abstract: PURPOSE: An image processing device with an image compensation function based on the record of ambient illuminance information and an image processing method thereof are provided to compensate a brightness coefficient according to the ambient illuminance, thereby obtaining a high quality image. CONSTITUTION: An illuminance sensor(104) detects the illuminance. An image signal processing unit(102) processes an input image signal acquired by an image sensor unit(101). A codec unit(103) encodes image signal information acquired by the image signal processing unit. The codec unit acquires a brightness coefficient. The codec unit controls the brightness coefficient based on the detected ambient illuminance detected by the illuminance sensor.
Patent KR-20120038693-A (KR)
Title: Glass for display eching installation used un-loading device
Inventor: LEE DAE CHUN
IPC: G02F1/13
Filed: 2010-10-14
Abstract: PURPOSE: An apparatus for unloading a glass etching device for a display is provided to be applied to an existing etching device, thereby lowering manufacturing costs. CONSTITUTION: A suction plate(10) corresponds to a glass. The suction plate includes a plurality of vacuum holes(11). A vacuum plate(20) is coupled with a lower part of the suction plate. The vacuum plate has a vacuum part connected with the vacuum hole. A vacuum pump(30) is connected onto the vacuum plate by a pipe(31). The vacuum pump keeps a vacuum condition in the vacuum part.
Patent KR-20120040386-A (KR)
Title: 2d-3d image conversion method and stereoscopic image display using the same
Inventor: AN CHEUNG HWAN
IPC: H04N13/00
Filed: 2010-10-19
Abstract: PURPOSE: A 2D to 3D image converting method and a stereoscopic image displaying device thereof are provided to express the perspective effect in detail when converting 2D content to 3D content. CONSTITUTION: A stereoscopic image display device generates a first depth map which sets a depth value of each object(S1). The device acquires the location and angle information of detailed objects(S2). The device sets layers in the object(S3). The device generates a second depth map by giving a depth value for each of the detailed objects(S4). The device generates the final depth map by combining the first depth map with a second depth map(S5).
Patent KR-20120041960-A (KR)
Title: Printed circuit board and method for fabricating the same
Inventor: BAE TAE KYUN
IPC: H05K3/40
Filed: 2010-10-22
Abstract: PURPOSE: A printed circuit board and a manufacturing method thereof are provided to improve the intensity of a printed circuit board by arranging an insulation layer and a film layer including reinforcement material between circuit layers connected to a post via. CONSTITUTION: A first circuit layer(15) is formed on the upper side of a first insulation layer(10). A second insulation layer(30) including a reinforcement material is formed on the first insulation layer. A film layer(40) is formed on the second insulation layer. A post via(20) is formed on the first circuit layer via the second insulation layer and the film layer. A second circuit layer is formed on the upper side of the film layer via the post via.
Patent KR-20120042482-A (KR)
Title: A garment hanger for container
Inventor: HWANG SE IN
IPC: A47G25/08
Filed: 2010-10-25
Abstract: PURPOSE: A garment hanger for a container is provided to move a body bar to a use position for delivering clothes and move the body bar back to a starting position when the delivery is completed. CONSTITUTION: A garment hanger for a container(100) is a rod shaped member and comprises a body bar(10) and a fix device(30). One end of the body bar is pivotally combined in one part of the container wall(5). The body bar can move between a starting position and use position. The fix device fixes one side of the body bar to other side wall of the container. The body bar is inserted into groove portion(7) which is formed in one part of the container wall at the starting point. The garment hanger for the container includes holders(40) and stays at the starting position.
Patent KR-20120044734-A (KR)
Title: Display apparatus
Inventor: LEE MOUNG YOUB
IPC: G02F1/1333
Filed: 2010-10-28
Abstract: PURPOSE: A display device is provided to simply fix a back cover to a sub bracket. CONSTITUTION: A spring portion(8510) moves in an arrow direction by compression of a spring(8512). If an end of a back cover(130) is inserted into a groove(2310) of a sub bracket(2300), the spring is restored. Therefore, the spring portion is inserted into a depressed portion(8500). The back cover is fixed to the groove of the sub bracket.
Patent KR-20120047675-A (KR)
Title: Method for forming semiconductor device
Inventor: CHUN SUNG GIL
IPC: H01L21/28
Filed: 2010-11-04
Abstract: PURPOSE: A method for forming a semiconductor device is provided to reduce refresh change by reducing the overlap change between a junction area and a buried gate. CONSTITUTION: A gate electrode layer(106) is formed on a bottom of a trench. The trench is formed in an active area(104) and an element isolation film(102). The active area, on which the trench is not formed, is etched and a recess is formed. A conductive layer pattern(112) is formed by filling the conductive layer in the recess. A contact plug, connected with an upper portion of the conductive layer pattern, is formed.
Patent KR-20120053580-A (KR)
Title: Image forming apparatus
Inventor: SHIN DONG HYUP
IPC: G03G15/00
Filed: 2010-11-18
Abstract: PURPOSE: An image printing apparatus is provided to prevent printing failure generated by remaining papers. CONSTITUTION: A paper supply cassette accepts papers. A pickup member(300) picks up the paper from the paper supply cassette. A paper separation member(400) pressurizes the pickup member when the paper supply cassette is installed on a main body. A paper separation member includes a plurality of links(410,420).
Patent KR-20120056343-A (KR)
Title: Track driving system for tidal flats
Inventor: HONG SUP
IPC: B62D55/08
Filed: 2010-11-25
Abstract: PURPOSE: A driving apparatus for ocean mudflats is provided to be easily driven on the mudflats and reduce replacement costs for damaged grousers and prevent the separation of caterpillar tracks from wheels because of jamming due to mud. CONSTITUTION: A driving apparatus for ocean mudflats comprises a main body unit(10), a driving unit(20), a manipulation unit(120), a boarding unit, a cover unit, and caterpillars(70). Both sides of the main body unit are coupled with a plurality of wheels(50) and driving wheels(40). The driving unit and the manipulation unit are installed on the top of the main body unit. The caterpillars are installed to cover the wheels and the driving wheels and are rotated by the driving wheels.
Patent KR-20120057363-A (KR)
Title: Ladder apparatus for working on a tunnel type structure
Inventor: YOUN SEOK OH
IPC: E21D11/40
Filed: 2010-11-26
Abstract: PURPOSE: A ladder assembly for working on a tunnel-type structure is provided to enable the safe and simple installation of a precast tunnel-type structure. CONSTITUTION: A ladder assembly for working on a tunnel-type structure comprises a frame assembly(100) and movement units. The frame assembly is movably arranged along the outer wall surface of first, second, and third precast structures(10,20,30). The frame assembly comprises stairs(101), railings(102), and work baskets(140). The movement units are arranged between the frame assembly and the precast structures and movably support the frame assembly to the external walls of the precast structures.
Patent KR-20120057892-A (KR)
Title: Apparatus for supplying hot rolling materials of link forging and method thereof
Inventor: SUNG BYUNG MOON
IPC: B21K27/02
Filed: 2010-11-29
Abstract: PURPOSE: An apparatus and a method for supplying hot rolled materials for link forging are provided to improve forging quality and prevent fails of a forging facility by maintaining a hot rolled cut material in a fixed position. CONSTITUTION: An apparatus for supplying hot rolled materials for link forging comprises a stopper(10) and first and second transfer units(20,30). A hot rolled cut material(1) is heated with high frequency waves and transferred through a chute(2). The stopper stops the hot rolled cut material at a fixed position of the transfer units. The first transfer unit pushes the hot rolled cut material stopped by the stopper. The second transfer unit transfers the hot rolled cut material transferred by the first transfer unit to a product transfer device(40).
Patent KR-20120071446-A (KR)
Inventor: JIN CHEOL
IPC: G11B7/09
Filed: 2010-12-23
Abstract: 본 발명에 따른 트래킹 액츄에이터 감도 보상 장치 및 방법은, 예를 들어, 라벨 인쇄 기능이 구비된 광디스크 드라이브에서, 광픽업의 포커스 위치 변화에 따른 트래킹 액츄에이터의 감도 보상을 위한 2 차 방정식의 함수 값을 미리 산출하여 저장함과 아울러, 라이트 스크라이브 디스크(LSD)의 라벨 면에, 인쇄 동작을 수행하면서, 광픽업의 포커스 위치와, 상기 저장된 2 차 방정식의 함수 값에 근거하여, 트래킹 액츄에이터의 감도를 계속 보상함으로써, 광픽업의 포커스 위치 변화로 인해 트래킹 액츄에이터의 감도가 변하더라도, 이를 적절히 보상하여, 라이트 스크라이브 디스크의 라벨 면의 내주 영역은 물론 외주 영역에서도, 균일한 트랙 간격으로 정확하게 이미지를 인쇄할 수 있게 된다.
Patent KR-20120072151-A (KR)
Title: Method of calculating reliability of input image based log-likelihood score
Inventor: KIM JIN YOUNG
IPC: G10L17/00
Filed: 2010-12-23
Abstract: PURPOSE: A method for calculating reliability based on a log-likelihood score is provided to obtain the best reliability value without predicting a too big or small value which is reflected to a voice and an image. CONSTITUTION: Each voice score and each image score are normalized in the range of 0 to 1(S1200). The difference between a first voice score and a second voice score is calculated by voice reliability(S1300). The first voice score is the maximum value among the normalized voice scores. The difference between a first image score and a second image score is calculated by image reliability. The maximum value of the second voice score is limited by a critical voice score. The maximum value of the second image score is limited by a critical image score.
Patent KR-20120072894-A (KR)
Title: Sex pheromone composition for attraction synanthedon bicingulata and manufacturing thereof
Inventor: YANG CHANG YEOL
IPC: A01N35/02
Filed: 2010-12-24
Abstract: PURPOSE: A method for manufacturing a sex pheromone composition for attracting Synanthedon bicingulata is provided to reduce damage of peach trees due to Synanthedon bicingulata. CONSTITUTION: A sex pheromone composition for attracting Synanthedon bicingulata contains (E,Z)-3,13-octadecadienyl acetate and (Z,Z)-3,13-octadecadienyl aetate as an active ingredient. The ratio of (E,Z)-3,13-octadecadienyl acetate and (Z,Z)-3,13-octadecadienyl acetate is 30:70-50:50. The compound is isolated from Synanthedon bicingulata male sex pheromone extract. A method for preparing the composition comprises a step of isolating the compounds from the extract. A mating disruptor composition for preventing Synanthedon bicingulata contains one of the compounds or a mixture thereof as an active ingredient.
Patent KR-20120077754-A (KR)
Title: Method for compensating data, compensating apparatus for performing the method and display device having the compensating apparatus
Inventor: KIM YUN JAE
IPC: G09G3/36
Filed: 2010-12-31
Abstract: PURPOSE: A method for compensating data, compensating apparatus for performing the method and display device having the compensating apparatus are provided to increase crosstalk of stereopsis according to a liquid crystal speed by producing compensating data in the same range with a gradation range of image data based on color reproducibility data. CONSTITUTION: A stereopsis determining unit(140) provides a stereopsis mode signal and image data to three dimensional color correction unit(300). The three dimensional color correction unit generates color correction data of image data. The three dimensional color correction unit includes three dimensional look-up tables(310) and interpolator(330). One dimensional color correction unit(500) generates color correction data of image data in response to a flat image mode signal. The one dimensional color correction unit includes one dimensional look-up tables(510) and interpolator(550).
Patent KR-20100029132-A (KR)
Title: High-strength steel sheet for can manufacturing and process for manufacturing the sheet
Inventor: OKAMOTO RIKI
IPC: C22C38/00
Filed: 2008-09-09
Abstract: The invention provides a high-strength steel sheet for can manufacturing which is improved in both strength and ductility while clearing the ASTM regulations and is thus excellent in workability. A high-strength steel sheet of 0.1 to 0.5 mm in product sheet thickness (t) for can manufacturing which has a composition containing by mass C: 0.04 to 0.13%, Si: more than 0.01% to 0.03%, Mn: 0.1 to 0.6%, P: 0.02% or below, S: 0.03% or below, Al: 0.01 to 0.2%, and N: 0.001 to 0.02% with the balance consisting of Fe and unavoidable impurities and a ferrite-base ferrite-martensite composite structure, characterized by having a martensite fraction of 5 to less than 30%, satisfying the relationship wherein d is martensite grain diameter (μm) and t is product sheet thickness (mm), and exhibiting a 30T hardness of 60 or above. 1.0 < (1-EXP(-t x 3.0)) x 4/d...
Patent KR-20100051645-A (KR)
Title: Method for publishing, querying and subscribing to information by a sip terminal in a voip network system, sip terminal, sip application server, sip information center and voip network system
Inventor: QIAN XIANGYU
IPC: H04L29/06
Filed: 2007-08-02
Abstract: The invention provides method for publishing, querying, subscribing to information by a SIP terminal in a VoIP network system, a SIP terminal, a SIP application server, a SIP information center and the VoIP network system. Wherein the VoIP network system is deployed with SIP information center for storing and providing at least the information. The method for publishing information by a SIP terminal in a VoIP network system comprises: creating a publishing request with the information to be published embedded in at the SIP terminal; sending the publishing request from the SIP terminal to the SIP information center via the SIP application server; recording the information in the SIP information center's database; and notifying the new information update to the subscribed SIP terminals.
Patent KR-20110030413-A (KR)
Inventor: YAMAGISHI YASUAKI
IPC: H04N21/4623
Filed: 2009-06-08
Abstract: 다수의 클라이언트로부터의 라이센스 취득 요구가 콘텐츠의 방송 개시시 직후 등에 집중하는 것을 피하여, 라이센스 서버의 동작 안정화를 도모한다.  IPTV 서버의 웹 서버(21)는, IPTV 클라이언트 단말기(10)로부터의 암호화된 콘텐츠를 재생하기 위한 라이센스 취득 요구에 따라, 방송 개시 시각 이후의 소정의 설정 시각까지의 시간 내에서 메인 라이센스의 취득 요구 시각을 랜덤하게 설정하고, 이 메인 라이센스의 취득 요구 시각의 정보와 상기 방송 콘텐츠의 방송 개시 시각으로부터 상기 소정의 설정 시각까지의 재생에 대응한 임시 콘텐츠 키를 포함하는 임시 라이센스를 IPTV 클라이언트 단말기(10)에 송신한다.  라이센스 서버(22)는, IPTV 클라이언트 단말기(10)에서 취득 요구 시각의 정보에 기초하여 실행된 메인 라이센스 취득 요구에 따라, 콘텐츠의 전체 시간의 재생에 대응하는 메인 콘텐츠 키를 포함하는 메인 라이센스를 송신한다.
Patent KR-20100041845-A (KR)
Title: Ethylene-based resin composite particle and environmentally friendly method for preparing the same
Inventor: KIMURA SHUICHI
IPC: B01J13/12
Filed: 2008-06-20
Abstract: The objective of the present invention is to provide an ethylene-based composite resin composite particle having a small-sized, approximately spherical form, comprising functional filler homogeneously dispersed therein, and being compatible with other resin pellets or components. To attain the above objective, the present invention provides an environmentally friendly method for producing an ethylene-based resin composite particle, comprising: (a) dissolving ethylene-based polymer in organic solvent separable from aqueous phase and dispersing hydrophobic filler in environment-friendly organic solvent to form solution of ethylene-based polymer in the organic solvent; (b) emulsifying the solution obtained in step (a) in non-ionic surfactant-containing aqueous solution; (c) heating the emulsion obtained in step (b) to remove the organic solvent; and (d) recovering a precipitate the ethylene-based resin composite particle containing the hydrophobic filler therein. The present invention also provides an ethylene-based resin composite particle produced by the afore-mentioned process.
Patent KR-20100043280-A (KR)
Title: Mobile communication system, base station, mobile station, and communication method and recording medium thereof
Inventor: ISHII NAOTO
IPC: H04W88/08
Filed: 2006-10-26
Abstract: Provided is a mobile communication system capable of avoiding a situation of using unnecessary power by continuing reception process in spite of that a mobile station has no change of packet reception. The mobile communication system includes: a base station repeating a transmission period and a transmission stop period at a predetermined control cycle and mobile station repeating a reception period and a reception stop period at a predetermined cycle (antenna, transmission/reception device, reception unit, user data separation unit, packet transmission judgment unit, reception period judgment unit, packet reception judgment unit, signal synthesis unit). The mobile station alternately repeats the reception period of and the reception stop period, reports the reception result to the base station, and starts the reception period in accordance with the start of the transmission period of the base station to receive a packet. When all the packets cannot be received during the reception period, the reception period is extended by a predetermined period within a control cycle. Moreover, when all the packets are correctly received during the reception period, the mobile station shifts to the reception stop period to stop reception.
Patent KR-20100067671-A (KR)
Title: Underwater aeration device
Inventor: TANAKA HIROYUKI
IPC: C02F7/00
Filed: 2008-09-02
Abstract: [PROBLEMS] To provide an underwater aeration device enabling prevention of closure with foreign matter, performing enhanced aeration, started under a lightened load, operated with a lessened maintenance work at a lower running cost, and manufactured at a lower cost. [MEANS FOR SOLVING PROBLEMS] An impeller (4) having a partition for sectioning a liquid passage (4w) and an air passage (4a) formed on a blade (4c) is interposed rotatably between the lower surface (5d) of an intermediate plate in which an air inlet (5s) is made and the upper surface (7u) of a suction cover in which a liquid inlet (7s) is made and contained in a guide casing (6). The liquid passage (4w) and the air passage (4a) at the distal end of the outer circumference of the partition on the back side of the blade are made to communicate with each other (4h). An intermediate impeller (4m) is provided on the outer circumference of the liquid passage (4w). The clearance between the lower end face (4d) of the blade and the upper surface (7u) of the suction cover is formed into a cone shape which is wide at the liquid inlet (7s) and narrow at the outer circumference including the guide vane tongue portion. A plurality of stand legs (8) and strainer projections (9) are projected integrally from the lower end face on the outer circumference of the lower wall (6d) of the guide casing. The upper surface (6o) of the upper wall between the air and liquid ejection passages is recessed as a down slope inclination surface widened toward the outer circumference.
Patent KR-20100110794-A (KR)
Inventor: WAKATSUKA SEI
IPC: C08J5/08
Filed: 2008-12-24
Abstract: 본 발명은 기계적 강도 및 충격 강도가 우수하고, 휨 변형도 적고, 또한 유동성(용융 유동성)이 향상된 폴리뷰틸렌테레프탈레이트 수지 조성물을 제공한다.  자세하게는, (A) 폴리뷰틸렌테레프탈레이트 수지 100중량부에 대하여, (B) 편평한 단면 형상을 갖는 유리섬유 40 내지 140중량부, (C) 글리세린 및/또는 그의 탈수 축합물과 탄소수 12 이상의 지방산으로 이루어지고, 본문에 기재된 방법에 의해 측정한 하이드록실기가가 200 이상인 글리세린지방산에스터 0.05 내지 5중량부를 배합한다.
Patent KR-20100108395-A (KR)
Title: Mercury dispensing devices with a reduced particle loss
Inventor: CORAZZA ALESSIO
IPC: H01J7/20
Filed: 2008-12-12
Abstract: Mercury dispensers (10; 20) having a highly reduced particle loss and containing a mixture of powders of a mercury releasing compound and of a plastic metal or alloy and optionally of a getter material are described. A mercury dispensing device (10:20) has a filiform cross-section, obtained by cutting a manufactured product having the same cross-section but a higher length, and comprises a metal container (11;21) and a mixture (12;22) of powders, comprised of at least one material suitable for releasing mercury by heating and a metal or a metal alloy, said mixture being arranged inside the container. Said metal or metal alloy has a Vickers hardness lower than 130 HV, its weight percentage is lower than the 10% of the total weight of the powders mixture and the size of the powders of said metal or alloy are not bigger than the size of the other powders of the mixture.
Patent KR-20100103720-A (KR)
Inventor: MEYLAN ARNAUD
IPC: H04B7/26
Filed: 2009-01-23
Abstract: 무선 데이터 송신과 관련된 채널의 분류 및 식별을 용이하게 하는 시스템들 및 방법들이 설명된다.  여기서 설명된 바와 같이, 다수의 이용 가능한 채널 중에서 패킷의 송신을 위해 지정된 채널이 선택될 수 있으며, 이를 기초로 패킷에서 미리 정해진 위치에 있는 비트가 선택된 채널을 나타내는 논리 값으로 설정될 수 있다.  여기서 또한 설명된 바와 같이, 미리 정해진 위치로부터의 논리 값 추출 및 대응하는 채널의 식별은 메시지의 파싱을 필요로 하지 않고 패킷의 수신 측에 의해 수행될 수 있다.  여기서 설명된 예에서, 전용 제어 채널(DCCH) 패킷의 논리 채널 식별자(LCID) 비트를 미리 정해진 값으로 설정함으로써 DCCH가 식별될 수 있다.  다른 예에서, 공통 제어 채널(CCCH) 패킷에 포함된 메시지 구조 내에 불 상수를 임베드함으로써 CCCH가 식별될 수 있다.
Patent KR-20100118993-A (KR)
Inventor: SILLANPAEAE HANNU
IPC: F02B19/08
Filed: 2009-02-16
Abstract: 본 발명은, 사전혼합형 연소 (오토 사이클) 를 위해 설치되는 내연기관의 실린더 (1) 를 위한 프리-챔버 장치에 관한 것으로, 상기 프리-챔버 장치는 연료의 혼합 및 점화를 위한 제 1 챔버 (7) 및 이 제 1 챔버 (7) 와 실린더 (1) 의 주 연소 챔버 (4) 사이의 소통을 위한 실질적으로 더 작은 용적의 제 2 챔버 (8) 를 포함하고, 제 1 챔버 (7) 에는 파일럿 분사 수단 (9) 이 제공되고 또한 제 2 챔버 (8) 의 실질적으로 반대쪽에 있는 챔버 상부가 구비된다.      상기 제 1 챔버 (7) 는 챔버 상부와 제 2 챔버 (8) 사이에 만곡된 벽을 가지는 실질적으로 타원형의 형상이다.     제 2 챔버 (8) 는, 주 연소 챔버 (4) 로부터 가압되고 제 1 챔버 (7) 의 만곡된 벽에 의해 점화될 파일럿 분사 수단 (9) 의 연료 쪽으로 그리고 이 연료를 지나서 안내되는 가스 연료를 위해 제 1 챔버 (7) 안에 텀블 유동 운동 (A) 을 제공하도록 제 1 챔버 (7) 에 대해 비대칭적으로 위치된다.
Patent KR-20100119795-A (KR)
Inventor: ORIGUCHI TAKAHIKO
IPC: G09G3/292
Filed: 2009-02-17
Abstract: 복수의 주사 전극 및 복수의 유지 전극과, 복수의 데이터 전극의 교차부에 복수의 방전 셀을 갖는 플라즈마 디스플레이 패널을 서브필드법으로 구동하는 구동 장치로서, 주사 전극 구동 회로는, 서브필드의 초기화 기간에 있어서의 제 1 기간에 복수의 주사 전극에 제 1 전위로부터 제 2 전위로 하강하는 제 1 램프 파형을 인가하고, 제 1 기간에 있어서 복수의 주사 전극이 제 1 전위보다 낮고 제 2 전위보다 높은 제 3 전위가 된 것을 전위 검출 회로가 검출했을 때에, 유지 전극 구동 회로는, 복수의 유지 전극에 제 4 전위로부터 제 5 전위로 하강하는 제 2 램프 파형을 인가한다.