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71 条记录 (耗时 0.033 秒)

    Semiconductor light emitting device
    61.
    发明申请
    Semiconductor light emitting device 有权
    半导体发光器件

    公开(公告)号：US20050029528A1

    公开(公告)日：2005-02-10

    申请号：US10876838

    申请日：2004-06-25

    申请人： Tsutomu Ishikawa

    发明人： Tsutomu Ishikawa

    IPC分类号： H01L27/15 ,  H01L33/06 ,  H01L33/10 ,  H01L33/32

    CPC分类号： H01L33/10 ,  H01L33/04 ,  H01L33/32

    摘要： In a III group nitride compound semiconductor wherein light that has been emitted in a light emitting portion formative layer is reflected by a multilayered reflection layer that is provided between the light emitting portion formative layer and sapphire substrate, it is desirable, for increasing the reflection efficiency of the light that has been emitted in the light emitting portion formative layer, that the multilayered reflection layer be provided at a position that is as near to the light emitting portion as possible. However, since the multilayered reflection layer is high in resistance value and also high in power consumption, locating the multilayered reflection layer near the light emitting portion formative layer results in that the resistance value in the vicinity of a relevant cathode electrode becomes increased. This raises the problem that emission of light occurs only in part of the light emitting portion formative layer. In the semiconductor light emitting device of the present invention, a superlattice layer is provided between the light emitting portion formative layer and the cathode electrode.

    摘要翻译： 在其中在发光部分形成层中发射的光被设置在发光部分形成层和蓝宝石衬底之间的多层反射层反射的III族氮化物化合物半导体中，期望提高反射效率 在发光部分形成层中已经发射的光的多层反射层设置在尽可能接近发光部分的位置。 然而，由于多层反射层的电阻值高，功耗高，所以将多层反射层定位在发光部形成层附近，导致相关阴极附近的电阻值上升。 这就产生了仅在发光部分形成层的一部分发生光的问题。 在本发明的半导体发光器件中，在发光部形成层和阴极之间设置超晶格层。

    Casting method with improved resin core removal step
    63.
    发明授权
    Casting method with improved resin core removal step 失效
    改善树脂芯去除步骤的铸造方法

    公开(公告)号：US5850868A

    公开(公告)日：1998-12-22

    申请号：US609673

    申请日：1996-03-01

    申请人： Yuji Okada ,  Masamichi Okada ,  Tsutomu Ishikawa ,  Takumi Yamamoto ,  Tatsuhiko Sawamura ,  Norio Hayashi ,  Takayuki Ito

    发明人： Yuji Okada ,  Masamichi Okada ,  Tsutomu Ishikawa ,  Takumi Yamamoto ,  Tatsuhiko Sawamura ,  Norio Hayashi ,  Takayuki Ito

    IPC分类号： B22D18/02 ,  B22C9/10 ,  B22D17/22 ,  B22D29/00 ,  B22D30/00

    CPC分类号： B22D29/001 ,  B22D30/00

    摘要： A casting method is disclosed in which a resin core is fabricated by using a resin which maintains a mechanical strength satisfying a shape accuracy required for a cast product until solidification of molten metal in contact with the core and is softened when heated beyond the core temperature at which the molten metal in contact with the core was solidified. The removal of the resin core from the cast product after the cast product containing the core from a die, includes a step of forcedly cooling the cast product containing the core down to a predetermined temperature at which the resin core can be removed from the cast product without being broken apart by pulling one of its ends, and a step of withdrawing the core at the predetermined temperature from the cast product having been forcedly cooled down. It is thus possible to cool the core down to a predetermined temperature suited for the withdrawal and preclude the inconvenience that the core being pulled is broken apart.

    摘要翻译： 公开了一种铸造方法，其中通过使用树脂来制造树脂芯，所述树脂保持机械强度满足铸造产品所需的形状精度，直到熔融金属与芯接触固化，并且当加热超过芯温度时软化 其中与芯接触的熔融金属固化。 在从模具中含有芯的铸造产品之后，从铸造产品中去除树脂芯包括将包含芯的铸造产品强制冷却到可以从铸造产品中去除树脂芯的预定温度的步骤 通过拉动其一个端部而不会分开，并且在预定温度下从已被强制冷却的铸造产品中取出芯的步骤。 因此，可以将芯冷却到适合于退出的预定温度，并且排除被拉动的芯分离的不便。

    Delay circuit using a digital memory
    64.
    发明授权
    Delay circuit using a digital memory 失效
    使用数字存储器延迟电路

    公开(公告)号：US5576709A

    公开(公告)日：1996-11-19

    申请号：US267477

    申请日：1994-06-28

    申请人： Masato Onaya ,  Tsutomu Ishikawa

    发明人： Masato Onaya ,  Tsutomu Ishikawa

    IPC分类号： G11C7/00 ,  G11C7/16 ,  G11C27/02 ,  H03M1/00

    CPC分类号： G11C7/16

    摘要： An adder 22, a quantizer 20, and a variable integrator 24 execute A/D conversion and the result is stored in a memory 12. A time constant of the variable integrator at this time is controlled by a time constant controller 25. On the other hand, data from the memory is integrated by a variable integrator 28 to provide an analog signal. At this time, control data of the time constant controller 25 is transferred via a memory 32 to a time constant controller 33, which then uses the transferred control data to control the time constant of the variable integrator 28. When a mode is changed, switches 34 and 35 are turned off. Therefore, a signal with no input can be written into the memory 12 for initializing the memory 12.

    摘要翻译： 加法器22，量化器20和可变积分器24执行A / D转换，并将结果存储在存储器12中。此时可变积分器的时间常数由时间常数控制器25控制。另一方面 通过可变积分器28将来自存储器的数据进行积分以提供模拟信号。 此时，时间常数控制器25的控制数据经由存储器32传送到时间常数控制器33，时间常数控制器33然后使用传送的控制数据来控制可变积分器28的时间常数。当模式改变时，开关 34和35关闭。 因此，无需输入的信号就可以被写入到用于初始化存储器12的存储器12中。

    FM stereo receiver
    66.
    发明授权
    FM stereo receiver 失效
    FM立体声接收器

    公开(公告)号：US5077797A

    公开(公告)日：1991-12-31

    申请号：US527742

    申请日：1990-05-23

    申请人： Tsutomu Ishikawa

    发明人： Tsutomu Ishikawa

    IPC分类号： H04B1/16

    CPC分类号： H04B1/1669

    摘要： An FM stereo receiver for receiving FM stereo broadcast signals includes a pro-logic surround system in which the left stereo signal, a right stereo signal, a stereo sum signal and a stereo difference signal are selectively emphasized. Also includes a noise signal detector for detecting the noise signal in the received signal, and a device for disabling the pro-logic surround system when the noise signal is detected.

    Level determining circuit generating output signal at first or second output terminal according to level of input signal
    67.
    发明授权
    Level determining circuit generating output signal at first or second output terminal according to level of input signal 失效
    电平确定电路根据输入信号的电平在第一或第二输出端产生输出信号

    公开(公告)号：US4983858A

    公开(公告)日：1991-01-08

    申请号：US404012

    申请日：1989-09-07

    申请人： Tsutomu Ishikawa

    发明人： Tsutomu Ishikawa

    IPC分类号： G01R29/027 ,  G01R19/165 ,  H03G11/02 ,  H03K5/24 ,  H03K17/30 ,  H04S7/00

    CPC分类号： H03K5/2463 ,  G01R19/16576 ,  H04S7/00

    摘要： A level determining circuit compares an input signal and a reference signal in level, generates a first output signal at a first output terminal (11) when the former is greater than the latter, and generates a second output signal at a second output terminal (12) if the former is smaller than the latter. A switch (15) is disposed in the preceding stage of the first output terminal, which will be opened if the first output signal is not required. A buffer amplifier portion (14) of high input impedance is further provided in the preceding stage of this switch so that the level determining operation can not be influenced by the change in impedance caused by switching of the switch.

    摘要翻译： 电平确定电路将输入信号和参考信号进行电平比较，当前者大于后者时，在第一输出端（11）产生第一输出信号，并在第二输出端（12）产生第二输出信号 ）如果前者小于后者。 开关（15）设置在第一输出端子的前级中，如果不需要第一输出信号，开关（15）将被打开。 在该开关的前一级进一步提供高输入阻抗的缓冲放大器部分（14），使得电平确定操作不会受到由开关切换引起的阻抗变化的影响。

    Demodulator circuit for television multi-channel
    68.
    发明授权
    Demodulator circuit for television multi-channel 失效
    电视多通道解调器电路

    公开(公告)号：US4953021A

    公开(公告)日：1990-08-28

    申请号：US472459

    申请日：1990-02-01

    申请人： Tsutomu Ishikawa ,  Akira Kabashima ,  Hideo Imaizumi

    发明人： Tsutomu Ishikawa ,  Akira Kabashima ,  Hideo Imaizumi

    IPC分类号： H04N5/60 ,  H04N7/06

    CPC分类号： H04N5/607 ,  H04N7/066

    摘要： A multi-channel sound signal received and detected in a TV receiver includes a main channel signal comprising a stereo sum (L+R) signal, a stereo pilot signal having a frequency of f.sub.H equal to the frequency of a horizontal synchronizing signal, and a sub-channel signal obtained by DSB modulation of a sub-carrier having a frequency of 2f.sub.H by a stereo difference (L-R) signal. In a TV multi-channel sound signal demodulator circuit, the sub-carrier is reproduced by a PLL circuit in response to the stereo pilot signal, to demodulate the stereo difference (L-R) signal using the sub-carrier. The stereo difference signal thus demodulated includes a 60Hz noise component due to interference between a sound signal and a video signal. However, the noise component is removed by a high-pass filter provided between a sub-channel signal demodulator circuit and a matrix circuit. Thus, right and left stereo signals R and L outputted from the matrix circuit do not include a noise component.

    摘要翻译： 在TV接收机中接收和检测的多声道声音信号包括主声道信号，其包括立体声（L + R）信号，具有等于水平同步信号的频率的频率fH的立体声导频信号，以及 通过立体声差（LR）信号通过具有2fH频率的副载波的DSB调制获得的子信道信号。 在TV多声道声音信号解调器电路中，副载波由PLL电路根据立体声导频信号再现，以使用子载波解调立体声差（L-R）信号。 由此解调的立体声差分信号包括由声音信号和视频信号之间的干扰引起的60Hz的噪声分量。 然而，通过设置在子信道信号解调器电路和矩阵电路之间的高通滤波器去除噪声分量。 因此，从矩阵电路输出的右和左立体声信号R和L不包括噪声分量。

    FMX stereophonic broadcast receiver
    70.
    发明授权
    FMX stereophonic broadcast receiver 失效
    FMX立体声广播接收机

    公开(公告)号：US4864637A

    公开(公告)日：1989-09-05

    申请号：US195106

    申请日：1988-05-16

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

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

    IPC分类号： H04B1/16

    CPC分类号： H04B1/1692

    摘要： An improved FMX sterophonic broadcast receiver provided with countermeasures against transient noises, which includes a level detection circuit for detecting level of a detected stereo difference signal, and a level control circuit for controlling level of an expanded stereo difference signal according to an output signal of the level detection circuit. By the above arrangement of the present invention, since it is so arranged to cause the level control circuit to function when the degree of modulation becomes large so as to control the level of the stereo difference signal to be low, a level difference is produced between the stereo sum signal and the stereo difference signal for deterioration of the stereo separation degree upon matrixing at a matrix circuit for reduction of noises accordingly.