baber/WOPTO huggingface dataset:
Patent JP-2005504277-A (JP)
IPC: A61K38/00
Filed: 2002-09-16
Abstract: This invention relates to the diagnosis and monitoring of ischemia, including but not limited to myocardial and cerebral ischemia, by measuring the concentration of molecules that do not originate from the ischemic tissue but whose concentration in the blood and other fluids changes as a consequence of the ischemic state.
Patent JP-2005504940-A (JP)
Title: ボールジョイント
IPC: F16C11/06
Filed: 2002-09-27
Abstract: 本発明は特に自動車のステアリングおよびまたはホイールサスペンションのためのボールジョイントに関し、該ボールジョイントがボールスタッド（１）を備えており、該ボールスタッドが１部分または多部分から成るボールシート（４）内で回転可能および揺動可能にソケット（７）の内部に受容されており、その場合、ボールシート（４）が閉鎖リング（９）によってソケット（７）内に固定されており、その場合、ボールジョイントの組立て状態でソケット（７）と閉鎖リング（９）との間にシールする当接面を準備する金属性の据込みエレメント（１８）が閉鎖リング（９）とソケット（７）との間に配置されている。
Patent JP-2005517093-A (JP)
Title: 螺旋捲縮加工され或る形状にされた単一ポリマー繊維及びそれらから製造される物品
IPC: D04H11/08
Filed: 2002-06-05
Abstract: 個人用ケア吸収性物品に使用するための不織布が提供され、この布は単一ポリマーの螺旋捲縮加工繊維から製造される。このような布は、ただ１つのポリマーを使用するので製造が経済的である。これらの布は空隙体積及び弾性に優れ、外側カバー、ライナ、サージ層、さらには吸収性コアとしての用途を含む多数の用途に有用である。
Patent JP-2005514997-A (JP)
Title: 体器官内の流動の定量的な算出を実行するための超音波画像シーケンスを処理する手段を有する観察システム
IPC: A61B8/12
Filed: 2002-12-11
Abstract: 体器官を介した流動の定量的な算出を実行するための、三次元（３−Ｄ）超音波画像のシーケンスを処理するための医療用超音波観察システムであって、以下のステップを実行するための手段を有している。つまり、上記流動の三次元カラーフロー画像のシーケンスを取得し；流動速度値のセグメント化により等速度表面（６）を構築する三次元画像における流動速度値を評価し；等速度表面により制限された容量を演算し；且つ、流動が伝播する器官の開口部の表面を算出するためのセグメント化された表面から算出された流動速度値（Ｖ）及び容量（Ｖｏｌ）を用いることを有している。この観察システムは、さらに、上記の開口部を介した上記の流動のピーク速度（ＶＲＥＧ）を測定し；上記開口部に対して上流へど伝播する流動の等速度表面における流動速度値の関数として流動が伝播する上記開口部の表面を演算することを、さらに有するステップを実行するための手段を有し、上記の容量は、上記のセグメント化された等速度表面及び上記の開口部を介して上記流動の上記ピーク速度から演算されていることを特徴としている。この表面は：ＳＯＲ＝Ｖｏｌ．Ｖ／ＶＲＥＧにて与えられる。このシステムは、僧帽弁における逆行性噴射の表面の評価に適用されてもよい。
Patent JP-2005525727-A (JP)
IPC: H03F1/02
Filed: 2003-01-23
Abstract: An RF power amplifier for amplifying an RF signal over a broad range of power with improved efficiency includes a main amplifier for amplifying an RF signal over a first range of power and with a power saturation level below the maximum of the broad range of power. A plurality of auxiliary amplifiers are connected in parallel with the main amplifier with each of the auxiliary amplifiers being biased to sequentially provide an amplified output signal after the main amplifier approaches saturation. The input signal is applied through a signal splitter to the main amplifier and the plurality of auxiliary amplifiers, and an output for receiving amplified output signals from the main amplifier and the plurality of auxiliary amplifiers includes a resistive load R/2. The split input signal is applied through a 90° transformer to the main amplifier, and the outputs of the auxiliary amplifiers are applied through 90° transformers to a output load. When operating below saturation, the main amplifier delivers power to a load of 2R and the main amplifier delivers current to the load which is one-half the current at maximum power and the amplifier is saturated.
Patent JP-2005517430-A (JP)
Title: 短干渉核酸（ｓｉＮＡ）を用いる蛋白質チロシンホスファターゼ−１ｂ（ｐｔｐ−１ｂ）遺伝子発現のＲＮＡ干渉媒介性阻害
IPC: A61K47/48
Filed: 2003-02-11
Abstract: 本発明は，種々の用途，例えば，治療，診断，標的評価およびゲノム発見用途における使用において，ＰＴＰ−１Ｂ遺伝子発現およびＰＴＰ−１Ｂ経路に関与する遺伝子を調節するのに有用な方法および試薬に関する。詳細には，本発明は，ＰＴＰ−１Ｂ遺伝子発現に対するＲＮＡ干渉（ＲＮＡｉ）を媒介しうる短干渉核酸（ｓｉＮＡ），短干渉ＲＮＡ（ｓｉＲＮＡ），二本鎖ＲＮＡ（ｄｓＲＮＡ），マイクロ−ＲＮＡ（ｍｉＲＮＡ），および短ヘアピンＲＮＡ（ｓｈＲＮＡ）分子に関する。短干渉核酸分子は，癌，炎症，肥満およびインスリン抵抗性（例えば，Ｉ型およびＩＩ型糖尿病）の治療に有用である。
Patent JP-2005520907-A (JP)
Title: アントラキノン染料
IPC: C09B1/32
Filed: 2003-03-13
Abstract: 式（Ｉ）：〔式中、Ｒ 1 及びＲ 3 が、互いに独立して、−ＮＨＲ 5 、−ＮＨＳＯ 2 Ｒ 5 、−ＮＨＣＯＲ 5 、−ＯＲ 6 又は−ＳＲ 7 であり、Ｒ 2 及びＲ 4 が、互いに独立して、−ＯＲ 6 又は−ＳＲ 7 であり、但し、置換基Ｒ 1 からＲ 4 の全てが、ＳＲ 7 ではなく；Ｒ 5 が、水素、アルキル、アリール、アラルキルであるか、又は式：−（Ｃ n Ｈ 2n Ｘ） m−Ｈ （ここで、Ｘが、−Ｏ−、−Ｓ−、−ＳＯ 2 −、−ＮＨ−、−ＮＲ 8 −、−ＣＯＮＨ−若しくは−ＣＯＮＲ 8 −であり、Ｒ 8 が、アルキル又はアリールであり、ｎが、２〜６の数であり、そしてｍが、１〜１０の数である）で示される基であり；Ｒ 6 が、アリール又はヘテロアリールであり、Ｒ 7 が、アルキル、アリール、ヘテロアリールであるか、又は式：−（Ｃ n Ｈ 2n Ｘ） m −Ｈ（ここで、Ｘが、−Ｏ−、−Ｓ−、−ＳＯ 2 −、−ＮＨ−、−ＮＲ 8 −、−ＣＯＮＨ−若しくは−ＣＯＮＲ 8 −であり、Ｒ 8 が、アルキル又はアリールである）で示される基である〕で示される化合物、その製造方法、並びに練り込み着色されたプラスティック又は着色ポリマー粒子の製造におけるその使用。
Patent JP-2005521818-A (JP)
IPC: E21B10/56
Filed: 2003-03-26
Abstract: A percussion drill bit for drilling a bore includes a drill body having a connecting section at a rear end thereof for connection to a percussive unit, and a plurality of cemented carbide buttons embedded in a front end of the drill body. Each button comprises a cemented carbide body having a rear mounting portion embedded in the drill body, and a front end protruding from the drill body. The front end of the cemented carbide button is substantially semi-spherically curved and defined by a radius whose origin is disposed axially rearwardly of a plane through the largest diameter of the button. The button projects from the drill bit body a distance which is not less than 50% of the button diameter. A conical intermediate surface forms, in cross-section, an acute angle of about 13-19° with an envelope surface of the rear mounting portion.
Patent JP-2005529894-A (JP)
Title: 抗精神病薬および抗肥満薬としての１，２，３，４，７，８−ヘキサヒドロ−６ｈ−［１，４］ジアゼピノ［６，７，１−ｉｊ］キノリン誘導体
IPC: A61P17/00
Filed: 2003-04-24
Abstract: 式Ｉの化合物またはその医薬上許容される塩（Ｒ １ ないしＲ ７ は明細書中に定義されているとおりである）が提供される。式Ｉの化合物は５ＨＴ ２ Ｃアゴニストまたは部分アゴニストであり、種々の障害の治療に有用である。     【化１】
Patent JP-2005524042-A (JP)
IPC: F28F3/08
Filed: 2003-04-23
Abstract: A stacked plate-type heat exchanger including a plurality of dish-shaped heat exchanger plates arranged one next to the other to form a nested heat exchanger plate stack. A plurality of first and second fluid flow channels are formed between the heat exchanger plates for first and second fluids respectively, and first fluid and second fluid chambers are formed in the stack in communication with the first and second fluid channels respectively. An end plate for the heat exchanger has an end plate central planar portion and a peripheral flange projecting from the end plate central planar portion, the peripheral flange of the end plate projecting in an opposite direction and sealably nested within the peripheral flange of a final heat exchanger plate in the plate stack. A planar reinforcing plate is secured to an inner surface of the end plate central planar portion between the end plate central planar portion and the final heat exchanger plate, a further fluid channel for one of the first and second fluids being located between the planar reinforcing plate and the final heat exchanger plate.
Patent JP-2004106838-A (JP)
Title: Crank and crankshaft for bicycle
Inventor: YAMANAKA MASAHIRO
IPC: B62M3/00
Filed: 2004-01-07
Abstract: <P>PROBLEM TO BE SOLVED: To provide a crank and a crankshaft for a bicycle capable of improving centering accuracy of a crank and a crankshaft, improving jointing strength in a rotating direction of them, and reducing the weight of a bicycle.  <P>SOLUTION: A crankshaft mounting hole for mounting to a crankshaft is installed to a crank 1 for a bicycle. A female serration 23 with eight teeth engaged with a male serration at an end of the crankshaft for jointing the crankshaft and the crank in the rotating direction, and an inner peripheral centering part 24 for centering the crankshaft and the crank across the entire inner periphery are formed on an inner face of the crankshaft mounting hole 21.  <P>COPYRIGHT: (C)2004,JPO
Patent JP-2005197442-A (JP)
Title: Wire bonding terminal and its manufacturing method, and semiconductor mounting substrate having the wire bonding terminal
Inventor: HIROYAMA YUKIHISA
IPC: H01L23/12
Filed: 2004-01-07
Abstract: <P>PROBLEM TO BE SOLVED: To provide a wire bonding terminal which keeps its wire bonding property even after being subjected to heat treatment and its manufacturing method, and to provide a semiconductor mounting substrate having the wire bonding terminal.  <P>SOLUTION: In the wire bonding terminal, a substituted palladium film having a palladium purity of 99.5 wt.% or above or an electroless palladium plating film having a palladium purity of 99.5 wt.% or above, a substituted gold plating film, and an electroless gold plating film, are formed in this order on the surface of copper which is a main component of the wire bonding terminal.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005197097-A (JP)
Title: Dye-sensitized solar cell
Inventor: GONDA ICHIRO
IPC: H01L31/04
Filed: 2004-01-07
Abstract: <P>PROBLEM TO BE SOLVED: To provide a dye-sensitized solar cell with durability improved through prevention of exfoliation of catalyst or the like of a counter electrode of a semiconductor electrode.  <P>SOLUTION: The dye-sensitized solar cell is provided with: a translucent substrate 2, a semiconductor electrode 3 having sensitizing dyes 31 arranged on the translucent substrate 2; a catalyst conductive electrode 4 with one face arranged so as to face the semiconductor electrode 3 and containing conductive materials 41 and catalyst 42; a substrate 5 arranged on on the other face of the catalyst conductive electrode 4; and electrolyte 6 contained at least in a part of the semiconductor electrode 3 and filled at least between the semiconductor electrode 3 and the catalyst conductive electrode 4.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2004244621-A (JP)
Title: Fiber reinforced substrate
Inventor: KATAGIRI SHIRO
IPC: C08J5/04
Filed: 2004-01-09
Abstract: <P>PROBLEM TO BE SOLVED: To provide a fiber reinforced substrate with reduced deformation in soldering at high temperature such as 260°C or above.  <P>SOLUTION: The fiber reinforced substrate is obtained by impregnating an aromatic liquid crystal polyester solution comprising 100 pts.wt. of a solvent expressed in the following, and 0.5-100 pts.wt. of an aromatic liquid crystal polyester to a reinforcing fiber sheet, and then removing the solvent. Wherein the solvent comprises at least 30 wt.% of a halogen substituted phenolic compound expressed by general formula (I). (In the formula, A is a halogen atom or trihalogenated methyl group, i is an integer of 1-5 which expresses the number of A, in the case of i≥2 two or more A may be the same or different.).  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2005198168-A (JP)
Title: Non-contact information recording medium and label using same
Inventor: TAKAHASHI MASAAKI
IPC: H01Q5/10
Filed: 2004-01-09
Abstract: <P>PROBLEM TO BE SOLVED: To improve an information write/read rate if being stuck to a dielectric.  <P>SOLUTION: The non-contact information recording medium comprises: an antenna part 20 which is band-shaped on a substrate 40; a conductor part 30 which has a different length from that of the antenna part 20 and is band-shaped on the substrate 40 approximately in parallel with the antenna part 20; and an IC chip 10 which is connected to the antenna part 20 and mounted on the substrate 40. If a wavelength determined from a frequency used to write/read information to/from the IC chip 10 and a permeability and a dielectric constant of the substrate 40 is defined as λ, the length of the antenna part 20 which is longer between the antenna part 20 and the conductor part 30, is made shorter than or equal with λ.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005200857-A (JP)
Title: Partition panel device
Inventor: AKIBA KAZUHISA
IPC: E04B2/78
Filed: 2004-01-13
Abstract: <P>PROBLEM TO BE SOLVED: To provide a partition panel device capable of securing sufficient strength, even in a vertical directional frame material formed of a material inferior in strength.  <P>SOLUTION: This partition panel device 1 supports four sides of a panel 5 by frame rods 2, 3 and 4 by respectively connecting mutual upper-lower end parts of a pair of left-right side part frame rods 2 by the upper frame rod 3 and the lower frame rod 4. An inserting hole 2a is arranged in the vertical direction of the side part frame rod 2, and a reinforcing rod 7 is fitted to and inserted into the inserting hole 2a.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2004235629-A (JP)
Title: High-speed performance printed circuit board and manufacturing method therefor
Inventor: CHAN BENSON
IPC: H01L23/538
Filed: 2004-01-15
Abstract: <P>PROBLEM TO BE SOLVED: To provide an improved multilayer PCB that realizes high-speed connections among electronic components mounted on a substrate.  <P>SOLUTION: An electronic component 77, having two multilayer portions 20, which is provided with a multilayer PCB 30 having the portions 20 and onto whose PCB one of the multilayer portions is mounted can be electrically connected so that high-frequency connections among the electronic components, is assured. Since this PCB further has a conventional PCB portion 31, it can not only lower the cost, but assures a structure that has an overall thickness suited for use in the PCB area. Further, connections are possible from these parts to internal portions. In addition, a method of manufacturing such a structure is provided.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2005199592-A (JP)
Title: Inkjet recording head and inkjet recording apparatus
Inventor: SETO SHINJI
IPC: B41J2/055
Filed: 2004-01-16
Abstract: <P>PROBLEM TO BE SOLVED: To make a piezoelectric plate or a laminate piezoelectric plate with a plurality of piezoelectric plates stacked and joined usable in a wide range for a deformation amount to a fixed voltage.  <P>SOLUTION: When piezoelectric element groups 252 of a level 1 and a level 3 in a direction X are arranged in the direction X, dots 1 of the level 1 and dots 3 of the level 3 are alternately formed in a direction Y. The dots 1 and the dots 3 are repeated by a high frequency (every printing pitch P), and therefore a size difference of the dots is hardly recognized visually. A size average of the adjacent dots ((level 1+level 3)/2) becomes an equal density to that of a level 2. Moreover, a dot size (density) as the whole of a printing line is averaged, that is, is made the equal density to that of the level 2. A printing quality is prevented from decreasing even if the piezoelectric plates of the level 1 and the level 3 are used. A thickness range of usable piezoelectric plates is increased, and the yield is improved accordingly.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2004247032-A (JP)
Title: Optical head, optical information recording/reproducing device, computer, video recording/reproducing device, video reproducing device, server, and car navigation system
Inventor: YASUDA AKIHIRO
IPC: G11B7/22
Filed: 2004-01-16
Abstract: <P>PROBLEM TO BE SOLVED: To provide an optical head capable of dealing with high multiple-fold speed recording, a dual layer disk or the like by improving light using efficiency.  <P>SOLUTION: In a beam shaping lens for shaping an elliptical beam emitted from a light source into a roughly circular beam, a pair of cylindrical surfaces bent in the same direction are provided, the cylindrical surface near the light source is aspherical, and the cylindrical surface far from the light source is spherical. Thus, the optical head in which abberation is reduced even when a beam shaping magnification is about twice is obtained.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2005209375-A (JP)
Title: Plug
Inventor: MATSUDA TAKESHI
IPC: H01R13/639
Filed: 2004-01-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide a plug capable of surely keeping a connected state, and of easily releasing the connection.  <P>SOLUTION: This plug P is so structured that plug-side contacts P3 are connected to socket-side contacts S3 to bring them into electrical conduction state by inserting and locking a plug P1 into/to a socket S. The plug is composed of: a plug housing P2 capable of being inserted into and extracted from a connection recessed part S1 of the socket S; a come-off prevention piece 21g projected from the connection recessed part S1 side of a plug housing side face P21f toward the opposite side and equipped with a come-off prevention locking part P21j locked to a lock part S21 of the socket S in its middle part; and a come-off prevention piece stopping part P22f formed on the plug housing side face P21f and formed so as to include a come-off prevention piece tip part P21i(P21n) in a tip part P22h. The come-off prevention piece 21g is prevented from swinging outward by the come-off prevention piece stopping part P22f.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005208127-A (JP)
Title: Optical propagation property control device, optical display, optical propagation property control program and control program of optical display and optical propagation property control method and control method of optical display
Inventor: ASAHI TSUNEMORI
IPC: G09G3/36
Filed: 2004-01-20
Abstract: <P>PROBLEM TO BE SOLVED: To provide an optical propagation property control device, and optical display etc., suitable for reducing table size and formation time as well as realizing a wide brightness dynamic range and large number of gradation, and a simplified process operation.  <P>SOLUTION: The projection display 100 tentatively determine the transmittance T2 of each pixel of the color modulation light valve, calculates the transmittance T1' of brightness modulation light valve for every unit pixel of color modulation light valve based on the tentatively determined transmittance T2 and HDR display data, and calculates the transmittance T1 of each pixel of the brightness modulation light valve by twice performing the pixel value conversion processes based on the calculated transmittance T1'. The transmittance T1'' of brightness modulation light valve is calculated for every unit pixel of the color modulation light valve by twice performing the pixel value matrix transform processes based on the determined transmittance T1, then the transmittance T2 of each pixel of the color modulation light valve is calculated based on the calculated transmittance T1'' and the HDR display data.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2004226987-A (JP)
Title: Improved multipass second harmonic generation
Inventor: RICHMAN BRUCE
IPC: G02F1/35
Filed: 2004-01-21
Abstract: <P>PROBLEM TO BE SOLVED: To improve an apparatus and method with which the adjustment of the relative phases of a pumping beam and second harmonic beam in multipass SHG.  <P>SOLUTION: The improved multipass second harmonic generation (SHG) is provided by using an inverting and self-imaging telescope. The embodiment ensures the parallel structure of all the passes of all beams within a nonlinear medium. According to another embodiment, the improved multipass SHG is provided by using a wedged phaser. The relative phases of a pump beam and second harmonic beam between the passes can be easily adjusted by such structure. Further, in another embodiment, the improved type mutlipass SHG is provided by using the inverting and self-imaging telescope in combination with the wedged phaser. The relative phases of the pump beam and the second harmonic beam between the passes can be adjusted by such structure and the parallel structure of all the paths of all beams can be assured within the nonlinear medium. The structure also allows the corresponding passes of the pump beam and the second harmonic beam to be made collinear within the nonlinear medium by design.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2005210351-A (JP)
Title: Report device
Inventor: SAKATA MASAAKI
IPC: H04M11/00
Filed: 2004-01-22
Abstract: <P>PROBLEM TO BE SOLVED: To provide a report device capable of discriminating the off-hook state of a report destination, even when the report destination is immediately hooked off after the start of a call, when polarity inversion is not returned to a line, and even when the report destination off-hooks and capable of retrying the discrimination when wrong discrimination has been made.  <P>SOLUTION: When an audible tone detecting section 12 did not detect a ring back tone, a busy tone, and a dial tone for a prescribed time, after transmission of a selection signal, a temporary discrimination section 15 temporarily decides that the report destination has been hooked off and makes information output section 13 output voice message information. A monitor-continuing section 16 makes the audible tone detection section 12 continue monitoring of the audible tone of a subscriber line signal, even if the information output section 13 transmits the voice message information, when the audible tone detection section 12 detects the ring back tone during the consecutive monitoring; and the monitor continuing section 16 makes the temporary discrimination section 15 restart its discrimination, and makes the information output section 13 stop its information output.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2004223710-A (JP)
Title: Process to connect acoustically by forming structure on substrate
Inventor: GABRIEL KAIGHAM J
IPC: B81C1/00
Filed: 2004-01-23
Abstract: <P>PROBLEM TO BE SOLVED: To easily form a breather to generate an acoustic wave to connect an acoustic cavity on a back surface of a movable part, a chamber on the back of a movable part storage part, the cavity and the chamber to each other in a micro-speaker which is an MEMS device.  <P>SOLUTION: A mesh type first metal layer 16 to be the movable part is previously provided on a silicon substrate 12. The acoustic cavity is formed on a back surface of the silicon substrate 12 by anisotropic dry etching. The first metal layer is exposed by the anisotropic dry etching with the mesh type first metal layer as a mask from the side of the first metal layer 16, and a guide opening hole reaching the acoustic cavity of the silicon substrate is drilled on a clearance part of a part of a mesh. Additionally, the chamber is formed by engraving a lower part of the mesh of the first metal layer by isotropic etching. The guide opening hole is made into the breather by increasing its size.  <P>COPYRIGHT: (C)2004,JPO&NCIPI
Patent JP-2005215029-A (JP)
Title: Optical film
Inventor: NAKADA SHOICHI
IPC: G02F1/13363
Filed: 2004-01-27
Abstract: <P>PROBLEM TO BE SOLVED: To provide an optical film for controlling polarized light and useful for an optical field such as displays and optoelectronics.  <P>SOLUTION: The optical film has an optical anisotropic layer formed by irradiating a photosensitive thin film with polarized radiation or non-polarized radiation, wherein the photosensitive thin film contains a polymer having at least one structure selected from a group consisting of structures expressed by (1): -P1-CR1=CR2-CO-Q1-, (2): P2-CR3=CR4-CO-Q2- and (3): -P3-CR5=CR6-CO-Q3. In the formulae, each of P1, P3, Q1, Q2 independently represents a divalent organic group having an aromatic ring, each of P2 and Q3 independently represents a monovalent organic group having an aromatic group, and each of R1 to R6 independently represents a hydrogen atom or an alkyl group.  <P>COPYRIGHT: (C)2005,JPO&NCIPI
Patent JP-2005216711-A (JP)
Title: Driving method of led element and driving device, lighting device as well as display device
Inventor: KAWAGUCHI YOSHINOBU
IPC: H05B37/02
Filed: 2004-01-30
Abstract: <P>PROBLEM TO BE SOLVED: To enable to drive effectively an LED element in which a plurality of luminous layers having mutually different emission wavelength peaks are interposed between a pair of p layer and n layer, and the emission color depends substantially on the drive current value only.  <P>SOLUTION: The LED lighting circuit 20 supplies a pulse current 21 to an LED lamp 10 including the LED element 22. The pulse current value operation part 24 of the LED lighting circuit 20 refers to the drive current value vs. emission color property of the LED element 22 and converts the color signal c that instructs the desired emission color into a peak value signal i. The duty operation part 25, based on an intensity signal p for instructing the desired emission intensity and the peak value signal i, calculates a duty signal d for instructing a duty D such that the product of a peak value I instructed by the peak value signal i and the duty D corresponds to the desired emission intensity instructed by the intensity signal p. The pulse current generating part 26 produces the pulse current 21 having the peak value I instructed by the peak value signal i and the duty D instructed by the duty signal d.  <P>COPYRIGHT: (C)2005,JPO&NCIPI