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    OPTICAL SEMICONDUCTOR ELEMENT AND OPTICAL SEMICONDUCTOR DEVICE
    3.
    发明申请
    OPTICAL SEMICONDUCTOR ELEMENT AND OPTICAL SEMICONDUCTOR DEVICE 审中-公开
    光学半导体元件和光学半导体器件

    公开(公告)号：US20100091805A1

    公开(公告)日：2010-04-15

    申请号：US12640897

    申请日：2009-12-17

    申请人： Tsutomu Ishikawa ,  Takuya Fujii

    发明人： Tsutomu Ishikawa ,  Takuya Fujii

    IPC分类号： H01S5/026 ,  H01S5/06

    CPC分类号： H01S5/06256 ,  H01L2224/48091 ,  H01L2224/49175 ,  H01S5/02276 ,  H01S5/0265 ,  H01S5/028 ,  H01S5/0612 ,  H01S5/06258 ,  H01S5/1209 ,  H01L2924/00014

    摘要： An optical semiconductor device includes an optical semiconductor element, a metal pattern and at least one thermal conductive material. The optical semiconductor element has a first optical waveguide region and a second optical waveguide region. The second optical waveguide region is optically coupled to the first optical waveguide region and has a heater for changing a refractive index of the second optical waveguide region. The metal pattern is provided on an area to be thermally coupled to a temperature control device. The thermal conductive material couples the metal pattern with an upper face of the first optical waveguide region of the optical semiconductor element. The thermal conductive material is electrically separated from the first optical waveguide region.

    摘要翻译： 光学半导体器件包括光学半导体元件，金属图案和至少一种导热材料。 光半导体元件具有第一光波导区域和第二光波导区域。 第二光波导区域光耦合到第一光波导区域并且具有用于改变第二光波导区域的折射率的加热器。 金属图案设置在要耦合到温度控制装置的区域上。 导热材料将金属图案与光半导体元件的第一光波导区域的上表面相连。 导热材料与第一光波导区域电分离。

    Optical semiconductor device
    4.
    发明授权
    Optical semiconductor device 有权
    光半导体器件

    公开(公告)号：US07515779B2

    公开(公告)日：2009-04-07

    申请号：US11727959

    申请日：2007-03-29

    申请人： Tsutomu Ishikawa

    发明人： Tsutomu Ishikawa

    IPC分类号： G02F1/295 ,  G02F1/01 ,  G02F1/035 ,  G02B6/26 ,  G02B6/42

    CPC分类号： H01S5/0612 ,  H01S5/0261 ,  H01S5/0265 ,  H01S5/06258 ,  H01S5/1209 ,  H01S5/125

    摘要： An optical semiconductor device has a heater, an optical waveguide layer, a first electrode and a second electrode. The heater is provided on a first semiconductor region and has more than one heater segment coupled or separated to each other. The optical waveguide layer is provided in the first semiconductor region and receives heat from the heater. The first electrode is coupled to a connecting point of the heater segments adjacent to each other. The second electrodes are electrically common and are coupled to other ends of the heater segments in opposite side of the connecting point respectively.

    摘要翻译： 光学半导体器件具有加热器，光波导层，第一电极和第二电极。 加热器设置在第一半导体区域上，并且具有多个彼此耦合或分离的加热器段。 光波导层设置在第一半导体区域中并且从加热器接收热量。 第一电极耦合到彼此相邻的加热器段的连接点。 第二电极是电气公共的，并且分别耦合到加热器段的连接点的相对侧的另一端。

    Center mode control circuit
    6.
    发明授权
    Center mode control circuit 失效
    中心模式控制电路

    公开(公告)号：US4980915A

    公开(公告)日：1990-12-25

    申请号：US390057

    申请日：1989-08-07

    申请人： Tsutomu Ishikawa

    发明人： Tsutomu Ishikawa

    IPC分类号： H04S5/02 ,  H04S3/00 ,  H04S7/00

    CPC分类号： H04S3/00

    摘要： A center mode control circuit includes an amplifying portion (31) for amplifying a center input signal, a switch (34) connected to an input terminal of the amplifying portion, and capacitors (35, 36) selected by the switch and having different characteristic from each other. The modes that are switched are (a) a normal mode for adding a low frequency component of the center input signal to left and right input signals, (b) a phantom mode for adding a full range of the center input signal to the left and the right stereo input signals, and (c) a wide mode for not adding the center input signal to the left and the right stereo input signals.

    摘要翻译： 中心模式控制电路包括用于放大中心输入信号的放大部分（31），连接到放大部分的输入端的开关（34）和由开关选择的具有不同特性的电容器（35,36） 彼此。 切换的模式是（a）用于将中心输入信号的低频分量添加到左和右输入信号的正常模式，（b）用于将全范围的中心输入信号添加到左侧的幻影模式，以及 正确的立体声输入信号，以及（c）用于不将中心输入信号添加到左侧和右侧立体声输入信号的宽模式。

    Sound reproducer
    7.
    发明授权
    Sound reproducer 失效
    声音再现器

    公开(公告)号：US4933768A

    公开(公告)日：1990-06-12

    申请号：US381923

    申请日：1989-07-19

    申请人： Tsutomu Ishikawa ,  Ryuichi Ogawa ,  Masaya Tanno ,  Fumio Tosaka ,  Hirofumi Okada ,  Takayuki Imaida

    发明人： Tsutomu Ishikawa ,  Ryuichi Ogawa ,  Masaya Tanno ,  Fumio Tosaka ,  Hirofumi Okada ,  Takayuki Imaida

    IPC分类号： H04S3/00 ,  H04S7/00

    CPC分类号： H04S7/40 ,  H04S7/301 ,  H04S3/00 ,  H04S7/302

    摘要： A television receiver includes a volume control circuit (4) for controlling levels of sound signals corresponding to a left channel, a right channel, a center channel and a surround channel and speakers (6 to 10) corresponding to these channels. The television receiver further comprises a test tone circuit (11; 18), a microcomputer (14) and a character display circuit (16). The test tone circuit (11; 18) supplies a test tone of a prescribed frequency sequentially to the speakers (6 to 10) through the volume control circuit (4). The microcomputer (14) provides a command to the character display circuit (16) so that a CRT 17) displays which speaker is currently supplied with the test tone as well as volume levels of the respective speakers.

    摘要翻译： 电视接收机包括用于控制对应于左声道，右声道，中央声道和环绕声道的声音信号的音量控制电路（4）以及对应于这些声道的扬声器（6至10）。 电视接收机还包括测试音电路（11; 18），微计算机（14）和字符显示电路（16）。 测试音电路（11; 18）通过音量控制电路（4）向扬声器（6〜10）依次提供规定频率的测试音。 微型计算机（14）向字符显示电路（16）提供命令，使得CRT 17）显示当前提供测试音的扬声器以及各扬声器的音量。

    Signal distinction circuit
    8.
    发明授权
    Signal distinction circuit 失效
    信号区分电路

    公开(公告)号：US4914680A

    公开(公告)日：1990-04-03

    申请号：US199935

    申请日：1988-05-27

    申请人： Masaya Tanno ,  Tsutomu Ishikawa

    发明人： Masaya Tanno ,  Tsutomu Ishikawa

    IPC分类号： G01R19/145 ,  H04B1/16

    CPC分类号： G01R19/145 ,  H04B1/1653 ,  H04B1/1692

    摘要： A signal distinction circuit comprises a clock signal generating circuit for generating a clock signal whose frequency is longer than that of a pulse signal corresponding to a discrimination signal applied to a counter as an actuating signal; and an arithmetic circuit for operating the pulse signal and the clock signal, and generating an output signal according to the presence or non-presence of the discrimination signal so as to forcibly drive a detecting circuit to which an output signal of the counter is applied, whereby the detecting circuit can be forcibly driven irrespective of the condition of the counter when the discrimination signal is not applied thereto.

    FM/FMX stereophonic receiver
    9.
    发明授权
    FM/FMX stereophonic receiver 失效
    FM / FMX立体声接收机

    公开(公告)号：US4809328A

    公开(公告)日：1989-02-28

    申请号：US157048

    申请日：1988-02-16

    申请人： Noboru Usui ,  Kanji Tanaka ,  Ryuichi Ogawa ,  Tsutomu Ishikawa ,  Kazuhisa Ishiguro ,  Masashi Arai

    发明人： Noboru Usui ,  Kanji Tanaka ,  Ryuichi Ogawa ,  Tsutomu Ishikawa ,  Kazuhisa Ishiguro ,  Masashi Arai

    IPC分类号： H04B1/16 ,  H04H5/00

    CPC分类号： H04B1/1692

    摘要： An FM/FMX stereophonic receiver is capable of receiving an FM or an FMX stereophonic broadcast signal. The FM stereophonic broadcast signal includes a stereo sum signal and stereo difference signal, whereas the FMX stereophonic broadcast signal further includes a compressed stereo difference signal and an FMX ID signal indicating the FMX stereophonic broadcast signal. The FM/FMX stereophonic receiver has a stereo demodulator for receiving said broadcast signal and for producing left and right stereo signals, a detector for detecting the field strength of the receiving signal, and a noise reducer, which may be a circuit for changing the mode from stereophonic mode to monaural mode or a high cut circuit for attenuating the signals of high frequency region, for reducing noise signals contained in the left and right stereo signals. The FM/FMX stereophonic receiver further has a detector for detecting the FMX ID signal and a disabling circuit for disabling the noise reducer when the FMX ID signal is detected by the detector. Instead of the disabling circuit, a timing control circuit may be provided for changing the timing at which the noise reducer starts to activate in response to the detection of the FMX ID signal.

    Method for tuning semiconductor laser
    10.
    发明授权
    Method for tuning semiconductor laser 有权
    半导体激光器调谐方法

    公开(公告)号：US08681826B2

    公开(公告)日：2014-03-25

    申请号：US13117557

    申请日：2011-05-27

    申请人： Hirokazu Tanaka ,  Tsutomu Ishikawa ,  Toyotoshi Machida

    发明人： Hirokazu Tanaka ,  Tsutomu Ishikawa ,  Toyotoshi Machida

    IPC分类号： H01S3/10

    CPC分类号： H01S5/06256 ,  H01S5/0265 ,  H01S5/0612 ,  H01S5/06258 ,  H01S5/1209 ,  H01S5/1212

    摘要： A method for tuning a semiconductor laser including a plurality of wavelength selection portions, each of which has a periodic wavelength characteristic, including: controlling a value of a refractive index controlling means of the wavelength selection portions to achieve a desired output wavelength of the laser; and shifting the value when the value is equal to or excess of a predetermined value to a basal value side until achieving the desired output wavelength, the basal value being a value without applying refractive index variation by the refractive index controlling means, the predetermined value being a value for shifting one period of the periodic wavelength characteristic.

    摘要翻译： 一种调谐半导体激光器的方法，所述半导体激光器包括具有周期性波长特性的多个波长选择部分，包括：控制所述波长选择部分的折射率控制装置的值以实现所述激光器的期望输出波长; 并且当所述值等于或超过预定值到所述基本值侧而将所述值移位直到达到期望的输出波长时，所述基础值是不由所述折射率控制装置施加折射率变化的值，所述预定值是 用于移动周期波长特性的一个周期的值。