baber/WOPTO huggingface dataset:
Patent KR-20090034547-A (KR)
Title: Device for sensing nut unbalance of nut welding device
Inventor: KIM SUNG CHUL
IPC: B23K37/00
Filed: 2007-10-04
Abstract: A nut eccentricity detecting apparatus for a nut welding machine is provided to detect the eccentricity of the weld nut by sensing pressure change through a pressure meter as pneumatic pressure maintained inside a pin holder leaks in case the weld nut is eccentrically placed in a locating pin. A nut eccentricity detecting apparatus for a nut welding machine comprises: a pin holder(3); a split piston(11) installed inside a piston chamber(5) of the pin holder; a lower spring(17) which is inserted in a spring guider(13) of the split piston and provides the upward elastic force for the split piston; an adaptor(21) connected on the top of the pin holder; a sealing(29) interposed between the circumference of adaptor and the upper side of the split piston; a locating pin(31) which is inserted into a pinhole(25) of the adaptor and in which a taper(27) part is formed in the lower part; an upper side spring(19) which is inserted inside the ring guider of the split piston and elastically supports the locating pin; a constant pressure supply unit(40) supplying the constant pneumatic pressure to the piston chamber; and a pressure meter(50) measuring the pneumatic pressure inside the piston chamber and outputting the signal to a controller.
Patent KR-20090034662-A (KR)
Title: Mobile terminal and its menu location moving method
Inventor: CHO HYE YOUN
IPC: H04B1/40
Filed: 2007-10-04
Abstract: A mobile terminal and a method for moving a menu item to another menu group are provided to replace the location of a menu item displayed on a touch screen with another menu item by dragging the menu item. Plural menu items are displayed on a touch screen(S101), and a user starts dragging a menu item by touching the item(S102). A touch release operation is released(S103). If the menu item which exits at a point where the touch operation for the dragged menu item is released is the menu item for moving into an initial screen, a menu item in a sub menu group moves to the initial screen(S104, S105). If the menu item which exits at a point where the touch operation for the dragged menu item is released is the menu for restoration, the menu item on the initial screen moves into its original submenu group(S106, S107).
Patent KR-20090036407-A (KR)
Title: Display apparatus and method of driving the same
Inventor: KIM SUNG WOON
IPC: G02F1/133
Filed: 2007-10-09
Abstract: A display apparatus and a method of driving the same are provided to form vertical electric field in a liquid crystal layer when a display state is changed from high gradation to low gradation to quickly recover a state of liquid crystal molecule in vertical alignment, thereby improving display quality. The first display panel comprises the first electrode(161) and the second electrode(165). The first electrode receives the first driving voltage determined according to display gradation information. The second electrode receives the second driving voltage determined according to the display gradation information. The second display panel comprises the third electrode(231). The third electrode receives a common voltage. A liquid crystal layer is positioned between the first display panel and the second display panel. The liquid crystal layer is made of liquid crystal molecule. When voltages are not applied to the first to third electrodes, the liquid crystal molecule is vertically aligned in the first and second display plates.
Patent KR-20090036689-A (KR)
Title: Apparatus for supplying a pulverized coal
Inventor: KIM TAE SEON
IPC: C10B31/06
Filed: 2007-10-10
Abstract: A pulverized coal supplying apparatus is provided to improve coal injection efficiency by moving a length adjustment pipe forward and backward according to length change of a pulverized coal supply lance. A pulverized coal supplying apparatus(100) comprises: a guide pipe whose one side is connected to a pulverized coal supply pipe; and a length adjustment pipe(140) assembled in the outer surface of the guide pipe. One side of the length adjustment pipe is connected to a pulverized coal injection lance. The inserting interval of the pulverized coal injection lance is controlled by adjusting the interval between the pulverized coal supply pipe and the pulverized coal injection lance.
Patent KR-20090041597-A (KR)
Title: Motor controller of air conditionerand method of controlling motor
Inventor: JUNG HAN SU
IPC: F24F1/20
Filed: 2007-10-24
Abstract: A motor control device of an air-conditioner and a control method thereof are provided to stably control an electric motor and differentiate the response speed in control speed by differentiating the gain in the initial move time and the general operating. A motor control device of an air-conditioner controls a driving section of an electric motor classified relative to an initiation operation section(T1) and a general working section(T3) in order to control. An initiation operation section is applied with the constant current from the electric motor in the initial movement. After the initial move operation, the output current of the electric motor is detected at the general working section. The gain within a MICOM is controlled in the initiation operation section and the general working section. The initiation operation section is the section which arranges the location of a motor rotor while moving the electric motor. The initiation operation section has the gain which is small set up than the gain of the general working section in order to reach a target speed command value.
Patent KR-20090041728-A (KR)
Title: Linear compressor
Inventor: HYEON SEONG YEOL
IPC: F04B39/12
Filed: 2007-10-24
Abstract: A linear compressor is provided to reduce the time and cost for assembling process by directly connecting the motor cover and the back cover by welding rather than using bolts. A linear compressor(100) comprises a cylinder(200) having a refrigerant compression space inside, a piston(300) which compresses the refrigerant reciprocating inside the cylinder, a supporter(320) connected to the rear side of the piston, a plurality of front/rear main springs(820,840) which elastically support the supporter, a motor cover(540) supporting the front main springs, and a back cover(560) supporting the rear main springs. The motor cover is installed in front of the supporter at an interval in the axial direction, having a pair of supporting edges which are partly cut inside. The back cover is installed in the rear of the support at an interval in the axial direction, and welded on the supporting edges of the motor cover.
Patent KR-20090042653-A (KR)
Title: Sun roof awning apparatus for adjusting awning angle
Inventor: BACK SEUNG TEA
IPC: E04F10/00
Filed: 2007-10-26
Abstract: A shade awning apparatus for adjusting an awning angle is provided to shield light according to the illumination angle of sunlight by selectively rotating a shade. A shade awning apparatus for adjusting an awning angle comprises: a support frame(110) having a pair of sliding holes on both sides; a main frame formed in the top of the support frame at regular intervals; a lifting unit lifting the main frame to the specified position by receiving electric signals from a control unit(530); a shade folding unit selectively folding a pair of shades installed at the both sides by receiving electric signals; and a shade rotating unit selectively rotating a pair of shades in a vertical direction.
Patent KR-20090043038-A (KR)
Inventor: CHO HEUNG LYUL
IPC: H05B33/04
Filed: 2007-10-29
Abstract: 유기발광다이오드 표시장치의 제조 방법이 개시된다. 유기발광다이오드 표시장치의 제조 방법은 유기발광다이오드 소자를 투습율 및 투기율이 뛰어난 저융점 유리를 포함하는 밀봉부재로 밀봉함에 있어, 상기 밀봉부재를 전사방법으로 형성함으로써, 상기 밀봉부재에 크랙 및 포아가 발생하거나 단락되는 것을 방지할 수 있어 신뢰성 및 수명을 향상시킬 수 있다. 
       
     밀봉부재, 저융점 유리, 프릿 그라스, 유기발광다이오드 소자, 수분
Patent KR-20090044542-A (KR)
Inventor: SON MIN SEOK
IPC: G03F7/075
Filed: 2007-10-31
Abstract: 본 발명은 에칭 내성이 높은 실리콘계 화합물을 포함하는 포토레지스트 중합체, 상기 중합체를 포함하는 포토레지스트 조성물 및 이를 이용한 포토레지스트 패턴의 형성 방법에 관한 것으로, 본 발명에서는 반도체 소자의 포토리소그라피(photolithography) 공정시 ArF용 제1포토레지스트층 상부에 에칭 내성이 높은 실리콘계 화합물을 포함하는 본 발명의 포토레지스트 중합체로 제2포토레지스트층을 형성한 후, 이를 식각 마스크로 이용하여 ArF용 제1포토레지스트층을 식각함으로써, 패턴의 붕괴(collapse) 없이 미세한 포토레지스트 패턴을 형성할 수 있는 장점이 있다. 
       
     포토레지스트, 패턴 붕괴, 포토리소그라피
Patent KR-20090046566-A (KR)
Inventor: SONG JAE BONG
IPC: H01L21/66
Filed: 2007-11-06
Abstract: 웨이퍼 두께변화 측정 방법 및 장치가 개시된다. 광조사단계에서 광원으로부터 방출된 광을 웨이퍼에 조사한다. 간섭무늬생성단계에서 웨이퍼의 상면 및 하면에서 각각 반사된 제 1광 및 제 2광을 중첩하여 간섭무늬를 생성한다. 산출단계에서 생성된 간섭무늬의 개수 및 제 1광과 제 2광 사이의 위상차를 기초로 웨이퍼의 두께변화를 산출한다. 본 발명에 따른 웨이퍼 두께변화 측정 방법 및 장치에 의하면, 크기가 100 mm 보다 크고, 두께가 얇은 웨이퍼의 두께를 정확하게 측정할 수 있고, 웨이퍼의 하면과 기준면 사이에 발생하는 간섭무늬로 인한 중첩현상을 제거하여 웨이퍼의 두께변화를 최소한 λ/(2n)의 (λ:광원의 파장, n:웨이퍼의 굴절률) 정확도로 측정가능하며, 스캔(scan)과정이 요구되지 않아 신속하게 웨이퍼의 두께변화를 측정할 수 있어, 고품질의 웨이퍼를 저렴하고 신속하게 생산할 수 있다. 
       
     웨이퍼, 두께, 하이딩거 간섭무늬, 광원, 총두께변화
Patent KR-20090047315-A (KR)
Inventor: JANG YOUNG SU
IPC: H05K3/46
Filed: 2007-11-07
Abstract: 인쇄회로기판 제조방법이 개시된다. 절연기판을 제1 기판과 제2 기판 사이에 적층하는 단계, 제1 기판과 상기 제2 기판을 압착하는 단계, 제1 기판 및 절연기판에 캐비티(Cavity)를 형성하는 단계를 포함하는 인쇄회로기판 제조방법은, 인쇄회로기판의 캐비티를 형성하는 공정에서 캐비티 형성에 필요한 내부 빈 공간을 최소화함으로써 제품내부로의 습기 침투 및 내부 공기의 열팽창을 감소시켜 제조 공정 시 고온의 열적 스트레스로 인한 불량발생을 줄일 수 있다. 
       
     캐비티, 인쇄회로기판, 내부공간
Patent KR-20080042729-A (KR)
Title: Decimation filter
Inventor: MASUMOTO TAKAHIKO
IPC: H03H17/02
Filed: 2007-11-08
Abstract: A decimation filter is provided to transform a frequency of an input signal into a low frequency and easily process a predetermined decimation ratio without adding hardware. A decimation filter includes a plurality of calculation devices(20), a plurality of coefficient memories, and a selector(13). Each of the calculation devices has a multiplier(21) and an adder(22). The coefficient memories store a filter coefficient and correspond to the calculation devices. The selector sequentially selects and outputs the outputs of the calculation devices being synchronized with clock signals. When a decimation ratio is n, the filter coefficients are sequentially shifted as many as the filter coefficient of n are read from the coefficient memories. The filter coefficients are multiplied by a signal transmitted from the multiplier of the calculation device. The multiplication result is added by the adder and is outputted.
Patent KR-20090049358-A (KR)
Inventor: PARK SI WOO
IPC: D02H13/22
Filed: 2007-11-13
Abstract: 본 발명은 섬유준비기의 실(絲) 장력제어장치에 관한 것으로, 섬유준비기(정경기나 비밍기 등)로 송출(또는 인출)되는 실(絲) 각각의 장력을 실시간으로 감지한 다음 설정장력으로 유지되게 각각 제어하여 전체적으로 균일한 장력이 유지되도록 한 것이다. 
     본 발명은 장력조절기의 회전축에 고 데니어(500~8,000 Denier)사(絲)가 감긴 크릴을 각각 설치하여 실(絲) 각각의 송출장력이 설정된 장력으로 각각 제어되게 함으로써 전체 실(絲)의 균일한 장력과 정경이 달성된다. 
     본 발명에서 장력조절기(J)의 하나인 직류모터는, 장력제어기(6)로 정밀제어가 가능하여 수 백 내지 수천 본으로 구성되는 각각의 실(絲) 장력을 실시간으로 균일하게 달성할 수 있게된다. 본 발명 또 다른 장력조절기(J)의 하나인 MR 브레이크는 자기유변유체(magneto-rheological fluid)에 가해지는 자기장의 변화에 따라 유체의 항복응력이 변하는 성질을 이용하여 정밀한 제동력을 달성할 수 있어서 각각의 실(絲) 장력을 실시간으로 균일하게 달성할 수 있다. 
     
     장력조절기, 로드셀, 크릴, 직류모터, MR 브레이크, 고 데니어 사, 송출사
Patent KR-20090052508-A (KR)
Inventor: ROH CHI HYEONG
IPC: H01L21/28
Filed: 2007-11-21
Abstract: 본 발명은 반도체 메모리 소자 및 이의 형성 방법에 관한 것으로, 반도체 기판 상에 평행하게 형성된 제1 트랜지스터 패턴 및 제2 트랜지스터 패턴과, 상기 제1 트랜지스터 패턴 및 상기 제2 트랜지스터 패턴 사이의 상기 반도체 기판 내에 형성된 접합 영역, 및 상기 접합 영역 상에 지그재그 배열로 형성된 다수의 콘택을 포함하는 반도체 메모리 소자 및 이의 형성 방법 형성 방법을 개시한다. 
       
     드레인 콘택, 브릿지, 지그재그, 콘택홀
Patent KR-20070118215-A (KR)
Title: Semiconductor memory
Inventor: YAMAGUCHI SHUSAKU
IPC: G11C11/408
Filed: 2007-11-26
Abstract: A semiconductor memory is provided to respond to a read operation request from the outside of a memory promptly, and to increase data transmission speed. A memory core includes a plurality of memory blocks to disperse and to store plural bit data corresponding to an equal address. Each memory block comprises an equal address map. A semiconductor memory includes the memory core, a control circuit. The control circuit performs refresh operation of the memory blocks at different timing respectively. The control circuit performs the refresh operation for one of the memory blocks, and performs write operation or read operation of the other memory blocks at equal timing.
Patent KR-20070120472-A (KR)
Inventor: KIM GYOUNG GON
IPC: H04B1/40
Filed: 2007-11-27
Abstract: A wrist wearable-type mobile phone is provided to miniaturize existing mobile phones, to implement both a mobile phone function and a watch function at the same time, and to control every function with a stick. A wrist wearable-type mobile phone serves as both a mobile phone and a watch. The wrist wearable-type mobile phone comprises a stick. Using the stick, a user can control and operate all the functions of the wrist wearable-type mobile phone.
Patent KR-20090056475-A (KR)
Title: Plasma processing apparatus
Inventor: KWON KYOUNG SOO
IPC: H01L21/3065
Filed: 2007-11-30
Abstract: A plasma processing apparatus is provided to prevent recombination of a source gas while maximizing resolution ratio by generating plasma inside/outside of a chamber. A process chamber is formed at a chamber(110) to process a substrate(90) through plasma, and a source gas supply unit(180) supplies a source gas for processing the substrate to the chamber. A remote plasma generation unit(160) is arranged between a chamber and a source gas supply unit, and it supplies power to excite the source gas to first energy level plasma. A direct plasma generating unit(150) includes a chamber to excite the first energy level gas to second energy level plasma.
Patent KR-20090061886-A (KR)
Title: Combining structure for inner position of oven and combining device
Inventor: JUNG EUI SU
IPC: F24C7/00
Filed: 2007-12-12
Abstract: A joint structure and a joint member of the inside of an oven are provided to prevent damage of porcelain enamel even in case a part is joined on a wall including an enamel layer and fix a plurality of parts inside an oven. A joint structure of the inside of an oven comprises: a wall being formed at an inner surface and including an enamel layer; a joint hole formed at the wall; and a joint member inserted into a joint hole. The joint member has a mounting groove(220) accepting a protruded portion. The protruded portion is formed around the joint hole and is protruded in a direction of the joint hole of the enamel layer.
Patent KR-20090062578-A (KR)
Title: Apparatus and method for compositing image in digital image device
Inventor: RYU SU JIN
IPC: H04N5/265
Filed: 2007-12-13
Abstract: An image compositing apparatus and method in a digital image processor are provided to synthesize small a second photographed image on a first photographed image and provide information about the photographed images to a user, thereby providing convenience to the user. An image compositing apparatus in a digital image processor comprises a digital signal processor(39). The digital signal processor takes a picture of a first image and a next second image. The digital signal processor cuts down the size of a sub image arbitrarily selected out of the first and second images. The digital signal processor synthesizes the sub image with a main image.
Patent KR-20090064754-A (KR)
Title: Outrigger fixation device for industrial construction vehicle
Inventor: KIM JEONG KON
IPC: B66C23/78
Filed: 2007-12-17
Abstract: An outrigger fixation device for an industrial construction vehicle is provided to prevent damage to a joint unit or the fastening unit from being released due to a joint force. An outrigger fixation device for an industrial construction vehicle comprises a flange part, a counterpart flange part, and a fastening unit. The flange part is formed on the front side or rear side of a car body or the outer end of an outrigger frame(2). A female joint(7) or a male joint(7a) is formed to be adjacent to the outer end of the flange part and a plurality of through holes(2b) are formed along the outer circumference of the corresponding joint. The counterpart flange part is formed on the one end of an outrigger(1) which is arranged in order to be faced to the flange part of the outrigger frame. A plurality of through holes(1b) are formed along the outer circumference of the joint.
Patent KR-20090065896-A (KR)
Title: Film substrate formed with fine circuit thereon and manufacturing method thereof
Inventor: SEONG NAK HOON
IPC: H05K3/12
Filed: 2007-12-18
Abstract: A film substrate including fine circuits and a manufacturing method thereof are provided to form stably fine circuits on a thin and soft film substrate without causing thermal deformation on the substrate. A film substrate includes a plurality of fine circuits. The film substrate includes a fine circuit pattern(12) and conductive ink(13). A depressed fine circuit pattern is formed at least on one surface of the film substrate. The depressed fine circuit pattern is filled with the conductive ink. The conductive ink is hardened to form the fine circuits. The conductive ink is used for forming the fine circuits. The film substrate is made of a polyimide material or a polyester material.
Patent KR-20080058266-A (KR)
Title: Quartz glass body, method and casting mold for manufacturing the same
Inventor: MANFRED BORENS
IPC: C03B19/00
Filed: 2007-12-21
Abstract: A method for manufacturing a quartz glass body is provided to allow reliable introduction/simple separation of the quartz glass body into/from a mold, and to produce a quartz glass container in a safe process. A method for manufacturing a quartz glass body includes the steps of: injecting a mixture of quartz glass and water into a casting mold comprising an external mold(202) and an internal mold; drying the mixture of quartz glass and water in the casting mold; and separating the formed extrusion from the mold. At least molding surface part of the internal mold is formed of a watertight material. Surplus pressure acts on the mixture of quartz glass and water during the drying step.
Patent KR-20090069392-A (KR)
Title: Security strength system
Inventor: UHM DAE YONG
IPC: E05B47/00
Filed: 2007-12-26
Abstract: A security strength system is provided to limit a visitor by identifying the identity of the visitor by using the secrecy system of 4 steps. A personal identification code system made of a steel material is installed at the door. The iris recognition sensor is adhered to the door. The finger print recognition sensor is adhered to the door. The card key authentication system is adhered to the door. The identity of the visitor is identified with the secrecy system of 4 steps.
Patent KR-20090069515-A (KR)
Title: Method of preparing molybdenum dioxide or molybdenum thin film by hydrogen-reduction reaction of molybdenum oxide
Inventor: KIM YOUNG DO
IPC: C23C24/00
Filed: 2007-12-26
Abstract: A method of forming molybdenum dioxide or molybdenum thin film by hydrogen-reduction reaction of molybdenum oxide is provided to coat uniform MoO2 and Mo thin film by using a furnace raising temperature without separate complicated equipment. A method of forming Mo thin film by hydrogen-reduction reaction of MoO3 comprises: a step for contacting oxidation molybdenum powder with a metal substrate; a step for forming a MoO2 thin film on the metal substrate by firstly performing reduction heat-treatment under hydrogen atmosphere at temperature of 600°C or greater; and a step for reducing the MoO2 thin film into the Mo thin film by secondly performing reduction heat-treatment under hydrogen atmosphere at temperature of 700°C or greater. The first reduction heat treatment is performed by controlling time according to the thickness of deposit at 600~800°C. The second reduction heat treatment is performed by controlling time according to the thickness of deposit at 700~000°C.
Patent KR-20090072012-A (KR)
Title: Semiconductor device and method for fabricating of the same
Inventor: KIM HEE DAE
IPC: H01L21/31
Filed: 2007-12-28
Abstract: A semiconductor device and a manufacturing method thereof are provided to prevent tungsten residue capable of being generated in tungsten etch back by gently forming a tilt of an interlayer insulation film. A buffer oxide film(12) and an ESD(ElectroStatic Discharge) poly film(14) are successively formed on a semiconductor substrate(10). The buffer oxide film and the ESD poly film are selectively etched. A nitride film is formed on a whole surface of the semiconductor substrate. A side wall spacer(20) is formed in a side wall of the ESD poly film and the buffer oxide film by etching the nitride film. A BPSG film(16) is formed on a whole surface of the semiconductor substrate. Thickness of the nitride film is 3000~4000Å.
Patent KR-20090073852-A (KR)
Title: Low molecular weight organic compound, and organic photoelectric device comprising the same
Inventor: KIM HYUNG SUN
IPC: C09K11/06
Filed: 2007-12-31
Abstract: A low molecular weight organic compound is provided to be easily dissolved in organic solvent, to form a thin film with a wet process and to generate fluorescence and phosphorescence from red to blue wavelengths. A low molecular weight organic compound has a structure represented by below chemical formula 1. In chemical formula 1, X1-X14 are selected from the group consisting of CR' and N; and Ar1-Ar2 are independently single bond, substituted or unsubstituted C6-30 arylene group, and substituted or unsubstituted C2-30 heteroarylene group.
Patent KR-20070029249-A (KR)
Title: Game machine, game machine control method, and information storage medium
Inventor: IZUMI TADAKATSU
IPC: A63F13/45
Filed: 2005-07-05
Abstract: A game machine allowing the player to give an instruction to perform a predetermined game processing to the game machine and a specification of the condition of when the predetermined game processing is started. A game machine which performs a game processing at predetermined time intervals, updates one or more parameters concerning a game, and reflects the updated contents on the game screen. A storage unit (50) stores a parameter condition representing the condition of parameters after relating them to respective items of operation information representing the operation contents to perform a predetermined game processing. A judging section (56) judges whether or not a parameter satisfies the parameter condition corresponding to the operation information representing the operation content of the player. A game processing performing section (58) starts performing the predetermined game processing according to the result of the judgment by the judging section (56). ® KIPO & WIPO 2007
Patent KR-20070032780-A (KR)
Title: 배기 정화 장치의 ＮＯｘ 저감률 측정 방법
IPC: F01N11/00
Filed: 2005-07-21
Abstract: 디젤엔진(1)의 배기경로(5)에 장착한 NOx 환원 촉매(6)의 상류측으로 첨가노즐(7)에 의해 요소수 U를 분사하고, 배기 G에 포함되어 있는 NOx의 환원 정화를 도모하는 경우에, 첨가노즐(7)보다도 상류측의 NOx 농도 센서(9)의 계측치와 NOx 환원 촉매(6)의 하류측의 NOx 농도 센서(12)의 계측치의 쌍방을, 배기 G의 유량 및 배기 온도에 의존한 1차 응답 모델을 사용하여 보정한 후, 이들의 NOx 농도 보정치에 기초하여 NOx 저감률을 구하고, 배기 G의 유량이 적은 경우의 상류측의 NOx 농도 센서(9)의 계측치에 대한 하류측의 NOx 농도 센서(12)의 계측치의 시간적인 지연이나, 배기 온도가 낮은 경우의 NOx 환원 처리 속도의 저하에 기인한 오차를 경정한다.   
       
     NOx 환원 촉매, 환원제, 배기 정화 장치, NOx 저감률 측정 방법
Patent KR-20070028574-A (KR)
Title: Semiconductor device and method for manufacturing same
Inventor: IKEDA ATSUSHI
IPC: H01L21/28
Filed: 2005-05-20
Abstract: Disclosed is a semiconductor device comprising an insulating film (6) formed on a substrate (1), a buried metal interconnect (10) formed in the insulating film (6), and a barrier metal film (A1) formed between the insulating film (6) and the metal interconnect (10). The barrier metal film (A1) is composed of a metal oxide film (7), a metal compound film (8) and a metal film (9) sequentially arranged in this order from the side of the insulating film (6) to the side of the metal interconnect (10). The elastic modulus of the metal compound film (8) is higher than that of the metal oxide film (7). ® KIPO & WIPO 2007
Patent KR-20070030945-A (KR)
IPC: G01J1/44
Filed: 2005-07-11
Abstract: 광검출 장치에 포함되는 I／F 변환 장치(10)는 제1 비교부(11 1 ), 제2 비교부(11 2 ), 커런트 미러 회로(14), SR형 플립플롭 회로(16), 버퍼 앰프(18), 제1 캐패시터 C 1 , 제2 캐패시터 C 2 , 스위치 SW 1 , 스위치 SW 2 , 스위치 SW 11  및 스위치 SW 21 을 구비한다. 제1 비교부(11 1 ) 및 제2 비교부(11 2 ) 각각의 동작 특성은 서로 동일하다. 2개의 캐패시터 C 1  및 C 2  각각의 용량값은 서로 동일하다. 이 I／F 변환 장치(10)는 입력단(10a)이 포토 다이오드와 접속되어 있고, 포토 다이오드로 발생한 전류를 입력단(10a)에 입력하고, 그 입력한 전류의 크기에 따른 주파수의 신호를 버퍼 앰프(18)로부터 출력한다.