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1. 发明授权

US5889801A Driving method for tunable semiconductor laser diode, tunable light source device and driving method for the same 失效
标题翻译：可调谐半导体激光二极管的驱动方法，可调谐光源器件及其驱动方法
公开(公告)号：US5889801A
公开(公告)日：1999-03-30
申请号：US919308
申请日：1997-08-28
申请人： Tomoaki Kato , Yoshiaki Yamada
发明人： Tomoaki Kato , Yoshiaki Yamada
IPC分类号： H01S5/06 , H01S5/042 , H01S5/0625 , H01S3/10 , H01S3/00 , H01S3/19
CPC分类号： H01S5/06256 , H01S5/042 , H01S5/06255
摘要： A driving method for a tunable semiconductor laser which is remarkably effective for realizing high speed and stable wavelength switching is presented. Generally, when a single longitudinal mode laser oscillation wavelength of a tunable semiconductor laser diode comprising an active region and a wavelength control region is switched from .lambda..sub.1 to .lambda..sub.2, a wavelength control current (.lambda.-Control) supplied to the wavelength control region is switched from I.sub.1 to I.sub.2. In the driving method according to the present invention, an active layer current (Active) supplied to the active region is temporarily decreased below a predetermined value during a predetermined period, in order to temporarily stop the single longitudinal mode laser oscillation of the laser diode. Preferably, the length of the predetermined period is set longer both before and after the moment of the wavelength control current switching than at least the carrier lifetime in the wavelength control region, and the predetermined value of the active layer current is set below threshold currents of all longitudinal modes existing between longitudinal modes corresponding to oscillation wavelengths before and after the wavelength control current switching. According to the driving method, oscillations at undesirable longitudinal modes are prevented, and thus stable high speed wavelength switchings precisely following supplied wavelength control signals are made possible even in a laser such as a tunable DBR laser diode involving longitudinal mode hops.
摘要翻译：提出了一种对于实现高速和稳定的波长切换非常有效的可调谐半导体激光器的驱动方法。通常，当将包括有源区和波长控制区的可调谐半导体激光二极管的单一纵模激光振荡波长从λ1切换到λ2时，提供给波长控制区的波长控制电流（λ-Control）为从I1切换到I2。在根据本发明的驱动方法中，为了暂时停止激光二极管的单个纵模激光振荡，在预定时间段期间，提供给有源区的有源层电流（有源）暂时降低到预定值以下。优选地，在波长控制电流切换的时刻之前和之后，将预定周期的长度设置得比至少波长控制区域中的载波寿命长，并且将有源层电流的预定值设置为低于阈值电流在纵向模式之间存在的所有纵向模式对应于在波长控制电流切换之前和之后的振荡波长。根据驱动方法，防止了不期望的纵向模式的振荡，因此即使在诸如涉及纵向跳跃的可调谐DBR激光二极管的激光器中，也可以精确地提供稳定的高速波长切换，所以可以实现提供的波长控制信号。

2. 发明授权

US08633418B2 Spark plug manufacturing method 有权
标题翻译：火花塞制造方法
公开(公告)号：US08633418B2
公开(公告)日：2014-01-21
申请号：US12593038
申请日：2008-03-27
申请人： Tomoaki Kato , Akikazu Taido , Yuichi Nakano
发明人： Tomoaki Kato , Akikazu Taido , Yuichi Nakano
IPC分类号： B23K26/00
CPC分类号： H01T21/02 , B23K26/0622 , B23K26/28 , Y10T29/49002
摘要： There is provided manufacturing method of a spark plug that includes a center electrode and a ground electrode with a discharge gap left therebetween. At least one of the center electrode and the ground electrode has an electrode body containing a base metal and a noble metal tip welded to the electrode body. The spark plug manufacturing method includes a laser welding step for welding the noble metal tip and the electrode body by placing the noble metal tip at a given position on the electrode body, irradiating a pulsed laser onto the noble metal tip and the electrode body and thereby sequentially forming welding spots corresponding to pulses of the laser in a circumferential direction of the noble metal tip, wherein at least one of the laser pulses is an initially increasing type laser pulse having a laser intensity waveform in which a laser intensity increases with time during a predetermined initial period from a pulse start time.
摘要翻译：提供了一种火花塞的制造方法，该火花塞包括中心电极和接地电极，其间具有放电间隙。中心电极和接地电极中的至少一个具有包含焊接到电极体的基体金属和贵金属电极头的电极体。火花塞的制造方法包括：激光焊接步骤，用于通过将贵金属电极头放置在电极体上的给定位置上来焊接贵金属电极头和电极体，将脉冲激光照射到贵金属电极头和电极体上在贵金属电极头的圆周方向依次形成与激光脉冲相对应的焊点，其中至少一个激光脉冲是具有激光强度波形的初始增加型激光脉冲，激光强度波形在激光强度波形从脉冲开始时间起的预定的初始周期。

3. 发明申请

US20130272700A1 OPTICAL SIGNAL CONTROL DEVICE AND OPTICAL SIGNAL CONTROL METHOD 有权
标题翻译：光信号控制装置和光信号控制方法
公开(公告)号：US20130272700A1
公开(公告)日：2013-10-17
申请号：US13991936
申请日：2011-12-06
申请人： Mineto Satoh , Tomoaki Kato , Kenji Sato
发明人： Mineto Satoh , Tomoaki Kato , Kenji Sato
IPC分类号： H04B10/516
CPC分类号： H04B10/516 , H04B10/50
摘要： An optical signal control device includes an optical signal control unit and a drive circuit. The optical signal control unit includes m number of optical waveguides for propagating carrier light and (m×n) number of interaction regions, n number of interaction regions formed on each of the optical waveguides. The drive circuit includes (m×n) number of phase control units. The (m×n) number of phase control unit output a data signal for controlling the action of the (m×n) number of interaction regions to each of the (m×n) number of interaction regions. Each of the (m×n) number of phase control units outputs the data signal so that timing when the carrier light propagates to the interaction region to output the data signal and timing when the data signal arrives at the interaction region are synchronized. One of m and n is two or more.
摘要翻译：光信号控制装置包括光信号控制单元和驱动电路。光信号控制单元包括m个用于传播载波光的光波导和（m×n）个相互作用区，在每个光波导上形成n个相互作用区。驱动电路包括（m×n）个相位控制单元。（m×n）个相位控制单元输出用于控制（m×n）个数量的交互区域对（m×n）个交互区域的数量的动作的数据信号。（m×n）个相位控制单元中的每一个输出数据信号，使得载波传播到交互区域以输出数据信号的定时和数据信号到达交互区域时的定时同步。 m和n之一是两个或更多。

4. 发明授权

US08531094B2 Spark plug having self-cleaning of carbon deposits 有权
标题翻译：具有碳沉积自清洁功能的火花塞
公开(公告)号：US08531094B2
公开(公告)日：2013-09-10
申请号：US12595732
申请日：2008-09-10
申请人： Akira Suzuki , Tomoaki Kato , Mamoru Musasa , Jiro Kyuno
发明人： Akira Suzuki , Tomoaki Kato , Mamoru Musasa , Jiro Kyuno
IPC分类号： H01T13/20 , H01T13/14
CPC分类号： H01T13/20 , H01T13/14 , H01T13/34 , H01T13/39
摘要： The present invention provides a spark plug that includes a center electrode extending in an axial direction, a ceramic insulator having an axial hole formed in the axial direction to retain the center electrode in a front side of the axial hole and thereby form an assembly unit of the center electrode and the ceramic insulator, a metal shell surrounding an outer circumference of the ceramic insulator to retain therein the assembly unit, and a ground electrode having one end portion joined to a front end face of the metal shell and the other end portion facing the center electrode to define a spark gap therebetween, wherein the spark plug satisfies the following conditions: H≧1 mm, Vc≦17 mm3 and Ra≧1.0×103 K/(m·W) where H is a length by which the ceramic insulator protrudes toward the front from the front end face of the metal shell in the axial direction; Vc is a volume of part of the ceramic insulator extending within a range of 2 mm from a front end of the ceramic insulator toward the rear in the axial direction; and Ra is a thermal resistance per unit length, excluding air space, at 20° C. at a cross section of the assembly unit taken perpendicular to the axial direction at a position 2 mm away from the front end of the ceramic insulator.
摘要翻译：本发明提供一种火花塞，其包括沿轴向延伸的中心电极，具有沿轴向形成的轴向孔的陶瓷绝缘体，以将中心电极保持在轴向孔的前侧，从而形成组装单元所述中心电极和所述陶瓷绝缘体，围绕所述陶瓷绝缘体的外周的金属壳，以将所述组装单元保持在其中;以及接地电极，所述接地电极具有接合到所述金属壳的前端面的一个端部，所述中心电极在其间限定火花隙，其中所述火花塞满足以下条件：H> = 1mm，Vc @ 17mm 3，Ra> = 1.0×103K /（m·W）其中H是长度，陶瓷绝缘体从金属壳的前端面沿轴向向前突出; Vc是陶瓷绝缘体的一部分的体积，其距离陶瓷绝缘体的前端在轴向方向的后端2mm的范围内延伸; 并且Ra在距离陶瓷绝缘体的前端2mm的位置垂直于轴向的组装单元的截面处，在20℃下，每单位长度的热阻，不包括空气空间。

5. 发明授权

US08399799B2 Method for manufacturing spark plug 有权
标题翻译：火花塞的制造方法
公开(公告)号：US08399799B2
公开(公告)日：2013-03-19
申请号：US12594380
申请日：2008-03-31
申请人： Akikazu Taido , Tomoaki Kato
发明人： Akikazu Taido , Tomoaki Kato
IPC分类号： B23K26/00
CPC分类号： H01T21/02 , B23K26/06 , B23K26/28
摘要： A method for manufacturing a spark plug is a method for manufacturing the spark plug having an electrode base member and a noble metal tip welded thereto by means of a laser or an electrode base member, a tip base member joined thereto, and a noble metal tip welded to the tip bases material by means of a laser, and the method includes a laser welding process of welding the electrode base member or the tip base member to the noble metal tip by means of a laser and through use of a laser beam whose BBP value assumes 25 mm·mrad (a radius·a half angle) or less at a time point when a laser beam enters a transfer optical system for guiding the laser beam to areas to be welded where laser welding is to be performed.
摘要翻译：一种用于制造火花塞的方法是一种用于制造火花塞的方法，所述火花塞具有通过激光或电极基底部件焊接在其上的电极基底部件和贵金属电极头，连接到其上的尖端基体部件和贵金属电极头通过激光焊接到尖端基材上，该方法包括激光焊接工艺，该激光焊接工艺通过激光将电极基底部件或尖端基底部件焊接到贵金属焊嘴上，并通过使用BBP 在激光束进入用于将激光束引导到要进行激光焊接的区域的传递光学系统的时间点，假定为25mm·mrad（半径·半角）或更小。

6. 发明授权

US08395307B2 Spark plug for preventing accumulation of carbon on an insulator 有权
标题翻译：用于防止碳绝缘体积聚的火花塞
公开(公告)号：US08395307B2
公开(公告)日：2013-03-12
申请号：US13142893
申请日：2009-12-07
申请人： Akira Suzuki , Tomoaki Kato , Mamoru Musasa , Toshitaka Honda
发明人： Akira Suzuki , Tomoaki Kato , Mamoru Musasa , Toshitaka Honda
IPC分类号： H01T13/20
CPC分类号： H01T13/14
摘要： A spark plug which provides reliable prevention of adhesion and accumulation of carbon on an insulator, includes a center electrode extending in the direction of an axis CL1, a ceramic insulator having an axial hole which extends in the direction of the axis CL1 and in which the center electrode is provided, a cylindrical metallic shell provided externally of the outer circumference of the insulator and having a support portion formed on the inner circumferential surface thereof, and a ground electrode extending from a front end portion of the metallic shell. The insulator has a stepped portion supported by the support portion of the metallic shell, and a leg portion formed forward of the stepped portion. A space SP formed between the leg portion of the insulator and the inner circumferential surface of the metallic shell has a volume of 100 mm3 to 300 mm3 inclusive.
摘要翻译：提供可靠地防止绝缘体上的碳的粘附和积聚的火花塞包括沿轴线CL1的方向延伸的中心电极，具有沿轴线CL1的方向延伸的轴向孔的陶瓷绝缘体，其中，中心电极，设置在绝缘体的外周外侧的具有形成在其内周面上的支撑部分的圆筒形金属壳体和从金属壳体的前端部延伸的接地电极。绝缘体具有由金属壳的支撑部分支撑的阶梯部分和在阶梯部分的前方形成的脚部。在绝缘体的腿部和金属壳的内周面之间形成的空间SP的体积为100mm 3〜300mm 3（以下）。

7. 发明授权

US08344605B2 Spark plug and manufacturing method therefor 有权
标题翻译：火花塞及其制造方法
公开(公告)号：US08344605B2
公开(公告)日：2013-01-01
申请号：US13127196
申请日：2009-11-05
申请人： Takahiro Suzuki , Tomoaki Kato
发明人： Takahiro Suzuki , Tomoaki Kato
IPC分类号： H01T13/20 , H01T21/00
CPC分类号： H01T21/02 , H01T13/32 , H01T13/39
摘要： Provided are a spark plug in which the occurrence of spark blowout or the like is restrained for improvement of ignition performance, and a method of manufacturing the spark plug. A ground electrode (27 ) of the spark plug has a protrusion (28 ) which faces a center electrode (5). The distal end surface of the protrusion (28) has a noble metal tip (32) provided at the center thereof and includes an annular fusion portion (33) adjacent to the periphery of the noble metal tip (32), and an annular electrode base metal surface located externally of the annular fusion portion (33). A spark discharge gap (35) is formed between the center electrode (5) and the distal end of the protrusion (28) including the noble metal tip (32).
摘要翻译：提供了一种火花塞，其中抑制火花喷吹等的发生以提高点火性能，以及制造火花塞的方法。火花塞的接地电极（27）具有面向中心电极（5）的突起（28）。突起（28）的前端面具有设置在其中心的贵金属端头（32），并且包括与贵金属电极头（32）的周围相邻的环形熔接部（33），以及环状电极基体金属表面位于环形熔融部分（33）的外部。在中心电极（5）和包括贵金属电极头（32）的突起（28）的远端之间形成火花放电间隙（35）。

8. 发明授权

US08306375B2 Wavelength-tunable optical transmitter 有权
标题翻译：波长可调光发射机
公开(公告)号：US08306375B2
公开(公告)日：2012-11-06
申请号：US13057248
申请日：2009-03-27
申请人： Tomoaki Kato
发明人： Tomoaki Kato
IPC分类号： G02B6/12 , G02B26/00 , H01S3/10 , H04B10/02
CPC分类号： H01S5/0265 , B82Y20/00 , G02F1/017 , G02F2001/212 , H01S5/026
摘要： A first exemplary aspect of the present invention is a wavelength-tunable optical transmitter including: a semiconductor substrate (101); a wavelength-tunable light source that is formed on the semiconductor substrate (101) and includes at least a first reflector (102) of a wavelength-tunable type and a gain region (104); a semiconductor optical modulator formed on the semiconductor substrate (101); a first semiconductor optical waveguide (105c) that is formed on the semiconductor substrate (101) and smoothly connected to the wavelength-tunable light source; a second semiconductor optical waveguide (105d) that is formed on the semiconductor substrate and smoothly connected to the semiconductor optical modulator; a waveguide coupling region (108) in which the first and second semiconductor optical waveguides are collinearly coupled with a length LC that is not equal to m/2 (m: integer) times a complete coupling length LC0; and a second reflector (113) formed at an end of the waveguide coupling region (108).
摘要翻译：本发明的第一示例性方面是一种波长可调光发射机，包括：半导体衬底（101）; 形成在所述半导体基板（101）上并且包括至少第一波长可调型反射器（102）和增益区域（104）的波长可调光源; 形成在半导体衬底（101）上的半导体光调制器; 第一半导体光波导（105c），其形成在所述半导体基板（101）上并且平滑地连接到所述波长可调光源; 第二半导体光波导（105d），其形成在所述半导体基板上并且平滑地连接到所述半导体光调制器; 波导耦合区域（108），其中第一和第二半导体光波导与不等于完全耦合长度LC0的m / 2（m：整数）的长度LC共线耦合; 以及形成在波导耦合区域（108）的端部处的第二反射器（113）。

9. 发明申请

US20120267995A1 SPARK PLUG 有权
标题翻译： SPARK插头
公开(公告)号：US20120267995A1
公开(公告)日：2012-10-25
申请号：US13518126
申请日：2011-08-08
申请人： Takuya Shimamura , Tomoaki Kato , Jiro Kyuno , Naomichi Miyashita
发明人： Takuya Shimamura , Tomoaki Kato , Jiro Kyuno , Naomichi Miyashita
IPC分类号： H01T13/20
CPC分类号： H01T13/36
摘要： Disclosed is a spark plug having an insulator with good breakage resistance. A spark plug 1 contains a ceramic insulator 2, a plate packing 22 and a metal shell 3. The ceramic insulator 2 has, on an outer circumferential surface thereof, a step portion 14, a leg portion 13 and a curved surface portion 31 between the step portion 14 and the leg portion 13. The metal shell 3 has, on an inner circumferential surface thereof, a taper portion 21. The ceramic insulator 2 is fixed in the metal shell 3 with the step portion 14 retained on the taper portion 21 via the plate packing 22. Herein, 50% or more of an inner circumferential edge portion IP of the plate packing 22 is in contact with a part of the ceramic insulator 2 located front of a middle region CP of the curved surface portion 31.
摘要翻译：本发明公开了具有耐破坏性好的绝缘体的火花塞。火花塞1包含陶瓷绝缘体2，板状填料22和金属壳3.陶瓷绝缘体2在其外周面上具有台阶部14，脚部13和弯曲面31 台阶部分14和腿部13.金属壳体3在其内圆周表面上具有锥形部分21.陶瓷绝缘体2固定在金属壳体3中，台阶部分14被保持在锥形部分21上，经由这里，板状填料22的内周缘部IP的50％以上与位于曲面部31的中间区域CP的前方的陶瓷绝缘体2的一部分接触。

10. 发明申请

US20110257858A1 DRIVE STATE CONTROL APPARATUS FOR VEHICLE 有权
标题翻译：车辆驾驶状态控制装置
公开(公告)号：US20110257858A1
公开(公告)日：2011-10-20
申请号：US13033944
申请日：2011-02-24
申请人： Kazutaka Kobayashi , Yoshiyuki Aoyama , Takeshige Miyazaki , Akihiro Ohno , Ryohei Shigeta , Tomoaki Kato , Go Nagayama
发明人： Kazutaka Kobayashi , Yoshiyuki Aoyama , Takeshige Miyazaki , Akihiro Ohno , Ryohei Shigeta , Tomoaki Kato , Go Nagayama
IPC分类号： G06F17/00 , B60K23/08
CPC分类号： B60W30/18172 , B60K17/3462 , B60K17/35 , B60K23/08 , B60K23/0808 , B60K28/16 , B60W10/06 , B60W10/119 , B60W2520/28 , B60W2720/28 , F02D29/02
摘要： A drive state control apparatus is applied to a vehicle which has not only a transfer including a multi-disc clutch mechanism but also a changeover mechanism interposed in an axle and which can be switched between 2WD and 4WD. When a 2WD-to-4WD changeover condition is satisfied, the multi-disc clutch is immediately switched from a “decoupled state” to a “coupled state.” Meanwhile, a connecting operation of the changeover mechanism is started upon establishment of a state in which left and right rear wheels have no acceleration slippage, and a state in which rotational speeds of first and second axles on opposite sides of the changeover mechanism are approximately equal to each other. In addition, in the case where the left and right rear wheels have acceleration slippage after the 2WD-to-4WD changeover condition has been satisfied, an E/G output reduction control is executed. Thus, the connecting operation can be performed smoothly.
摘要翻译：驱动状态控制装置被应用于不仅具有多盘式离合器机构的传递的车辆，而且还包括插入在车轴中并且可以在2WD与4WD之间切换的切换机构。当满足2WD-to-4WD切换条件时，多盘离合器立即从“解耦状态”切换到“耦合状态”。同时，在建立状态时开始切换机构的连接操作左后轮和右后轮没有加速滑动，并且转换机构的相对侧上的第一和第二轴的转速大致相等的状态。此外，在满足2WD-4WD切换条件之后左右后轮具有加速滑移的情况下，执行E / G输出减少控制。因此，可以顺利地进行连接动作。

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