公开(公告)号：US20090224682A1

公开(公告)日：2009-09-10

申请号：US12398279

申请日：2009-03-05

申请人： Takao Muramatsu ,  Tomoyuki Ichikawa ,  Shinji Ohta

发明人： Takao Muramatsu ,  Tomoyuki Ichikawa ,  Shinji Ohta

IPC分类号： H05B41/36

CPC分类号： H05B41/2881 ,  H05B41/042

摘要： A discharge lamp lighting circuit for supplying an AC power to a discharge lamp includes first and second converters for receiving a DC voltage and stepping up the voltage. A controlling circuit drives the first and second converters CON1, CON2 alternately at a first frequency and stops an operation of a side that is not driven such that the AC power is supplied to the discharge lamp to execute a lighting operation.

摘要翻译： 用于向放电灯提供AC电力的放电灯点亮电路包括用于接收DC电压并提高电压的第一和第二转换器。 控制电路以第一频率交替驱动第一和第二转换器CON1，CON2，并且停止未被驱动的一侧的操作，使得向放电灯提供AC电力以执行点亮操作。

公开(公告)号：US07496010B2

公开(公告)日：2009-02-24

申请号：US10680109

申请日：2003-10-08

申请人： Shinji Ohta ,  Tatsushi Sano

发明人： Shinji Ohta ,  Tatsushi Sano

IPC分类号： G11B7/00

CPC分类号： G11B7/24082 ,  G11B7/0053 ,  G11B7/00745 ,  G11B27/24 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2562

摘要： A push-pull signal is detected from light reflected from a disk-shaped storage medium on which wobbling grooves are formed as recording tracks and address information is recorded by forming pre-pits on lands between adjacent grooves. A fundamental amplitude variation signal indicating the fundamental amplitude variation of the push-pull signal is acquired, and a reference voltage is generated by adding an offset voltage to the fundamental amplitude variation signal. Pre-pits are detected by comparing the push-pull signal with the reference voltage. Because the reference voltage is produced on the basis of the fundamental amplitude variation signal indicating the variation components of the push-pull signal due to the wobbling of grooves and noise, the variation components due to the wobbling and noise are reflected in the reference voltage. Furthermore, the variation components of the push-pull signal corresponding to the pre-pits are also reflected to a properly small extent in the reference voltage.

摘要翻译： 从形成有摆动槽的盘形存储介质反射的光作为记录轨迹检测推挽信号，并且通过在相邻槽之间的焊盘上形成预凹坑来记录地址信息。 获取表示推挽信号的基本幅度变化的基本幅度变化信号，并通过将偏移电压加到基本幅度变化信号上而生成基准电压。 通过将推挽信号与参考电压进行比较来检测预坑。 因为基于表示由于槽的波动和噪声引起的推挽信号的变化分量的基本幅度变化信号而产生参考电压，所以由于摆动和噪声引起的变化成分被反映在参考电压中。 此外，对应于预凹坑的推挽信号的变化分量也在参考电压中反映到适当的较小程度。

公开(公告)号：US20080018263A1

公开(公告)日：2008-01-24

申请号：US11780125

申请日：2007-07-19

申请人： Shinji Ohta ,  Tomoyuki Ichikawa

发明人： Shinji Ohta ,  Tomoyuki Ichikawa

IPC分类号： H05B41/16

CPC分类号： H05B41/288

摘要： A lighting circuit includes a capacitor and inductor for a resonance, and a first output, a second output, a resistor and a monitor circuit. A DC-AC converting circuit generates an AC voltage from a DC voltage. The resistor has an end connected to the second output and the other end connected to an end of a secondary winding. A monitoring output is connected to the other end of the resistor, and is provided for providing a signal for monitoring a current flowing to a discharge lamp. The end of the resistor is connected to a grounding conductor GND. The monitor circuit receives a signal from the monitoring output. The monitor circuit generates a signal for monitoring a current IL flowing to the discharge lamp.

摘要翻译： 照明电路包括用于谐振的电容器和电感器，以及第一输出，第二输出，电阻器和监视器电路。 DC-AC转换电路从直流电压产生交流电压。 电阻器的端部连接到第二输出端，另一端连接到次级绕组的一端。 监视输出连接到电阻器的另一端，并被提供用于提供用于监视流向放电灯的电流的信号。 电阻的末端连接到接地导体GND。 监控电路接收来自监视输出的信号。 监视电路产生用于监视流向放电灯的电流IL的信号。

公开(公告)号：US07282872B2

公开(公告)日：2007-10-16

申请号：US10916753

申请日：2004-08-12

申请人： Shinji Ohta ,  Masayasu Ito

发明人： Shinji Ohta ,  Masayasu Ito

IPC分类号： H05B37/02

CPC分类号： H05B41/2883

摘要： In a discharge lamp lighting circuit 1, circuits 12, 13, which respectively detect a voltage applied to a discharge lamp 10 and a current flowing through the discharge lamp are provided. Light on/off state, furthermore, light on/off state detecting means 25 is provided, which detects light on state or light off state of the discharge lamp, in that the absolute value of the difference between voltage and current detection values of the discharge lamp in light off state is larger than that in light on state.

摘要翻译： 在放电灯点亮电路1中，设置分别检测施加到放电灯10的电压的电路12,13和流过放电灯的电流。 另外，在开/关状态下，设置有用于检测放电灯的点亮状态或熄灭状态的灯开/关状态检测单元25，其特征在于，放电灯的电压和电流检测值之差的绝对值 灯灭灯状态大于亮灯状态。

公开(公告)号：US20060238137A1

公开(公告)日：2006-10-26

申请号：US11410456

申请日：2006-04-24

申请人： Shinji Ohta

发明人： Shinji Ohta

IPC分类号： H05B37/02

CPC分类号： H05B41/2883

摘要： A discharge lamp lighting circuit includes a DC/AC converter, a starting circuit, a control unit, a plurality of switching elements driven by the control unit and a series LC resonance circuit. At the time of lighting the discharge lamp, the driving frequency of the switching elements is set to a value higher than a resonance frequency at a time of lighting the discharge lamp thereby to drive and control the switching elements. When the driving frequency reduces and the extinction of the discharge lamp is detected, the driving frequency is shifted to a frequency region which is higher than a resonance frequency at a time of extinguishing the discharge lamp thereby to restart the lamp. Further, when the driving frequency reduces to a value lower than the resonance frequency at a time of lighting the discharge lamp during the lighting of the discharge lamp, the driving frequency is restored to a frequency region higher than the resonance frequency at a time of lighting the discharge lamp.

摘要翻译： 放电灯点亮电路包括DC / AC转换器，起动电路，控制单元，由控制单元驱动的多个开关元件和串联LC谐振电路。 在点亮放电灯时，将点亮放电灯时的开关元件的驱动频率设定为高于谐振频率的值，从而驱动并控制开关元件。 当驱动频率降低并且检测到放电灯的消光时，驱动频率被移动到在熄灭放电灯时高于谐振频率的频率区域，从而重新启动灯。 此外，当在放电灯点亮期间驱动频率降低到点亮放电灯时的谐振频率的值时，驱动频率被恢复到在照明时高于谐振频率的频率区域 放电灯。

公开(公告)号：US20050035725A1

公开(公告)日：2005-02-17

申请号：US10914664

申请日：2004-08-09

申请人： Shinji Ohta ,  Masayasu Ito

发明人： Shinji Ohta ,  Masayasu Ito

IPC分类号： H05B41/24 ,  H05B41/18 ,  H05B41/288 ,  H05B41/38 ,  H05B41/16

CPC分类号： H05B41/382 ,  H05B41/2883 ,  Y10S315/07

摘要： A discharge lamp illumination circuit 1 has a DC-AC conversion circuit 3, which effects DC-AC conversion and boosting upon receipt of a DC input, and a starter circuit 4. Power output from the DC-AC conversion circuit 3 is controlled by means of control means 6. The DC-AC conversion circuit 3 has an AC conversion transformer 7; a plurality of switching elements 5H and 5L; and a resonance capacitor 8. The switching elements are activated by the control means 6, thereby causing serial resonance between the resonance capacitor 8 and a leakage inductance component of the AC conversion transformer 7, or between the resonance capacitor 8 and an inductance component 9 connected to the resonance capacitor 8. Provided that a resonance frequency achieved during an extinction period of the discharge lamp 10 is denoted as f1, the operating frequency is first regulated to a frequency level deviating from f1 and then gradually reduced so as to approach f1 in connection with a no-load voltage which is applied to the discharge lamp before illuminating.

摘要翻译： 放电灯照明电路1具有DC-AC转换电路3，其在接收DC输入时实现DC-AC转换和升压，以及起动电路4.来自DC-AC转换电路3的输出的功率由装置 DC-AC转换电路3具有AC变换变压器7; 多个开关元件5H和5L; 和谐振电容器8.开关元件由控制装置6启动，由此引起谐振电容器8与交流转换变压器7的漏电感分量之间或谐振电容器8和连接的电感元件9之间的串联谐振 假设在放电灯10的消光期间实现的谐振频率为f1，则将工作频率首先调节到与f1相反的频率水平，然后逐渐减小，以便在连接中接近f1 具有在照明之前施加到放电灯的空载电压。

公开(公告)号：US06751171B2

公开(公告)日：2004-06-15

申请号：US09216038

申请日：1998-12-18

申请人： Shinji Ohta

发明人： Shinji Ohta

IPC分类号： G11B7095

CPC分类号： G11B7/0941 ,  G11B7/0953

摘要： A recording and/or reproducing apparatus for an optical disc in which the loop gain variation in tracking servo control can be suppressed to cause the illuminated laser light to follow correctly the recording track center. An optical disc recording/reproducing device 1 detects a traversing signal generated when the laser light traverses a track at the time of tracking servo pull-in and sets the amplification degree of a GCA 4 so that the push-pull signals will be at a predetermined level. The optical disc recording/reproducing device 1 holds the amplitude of the wobbling signals on memory as an initial setting value. On starting the recording or reproduction, the optical disc recording/reproducing device 1 monitors the amplitudes of the wobbling signals during the recording or reproduction to compare the amplitudes to the initial setting value. The optical disc recording/reproducing device 1 sets the amplification degree in meeting with the ratio of increase or decrease of the wobbling signals to control the GCA 4 and the gain of the push-pull signals.

摘要翻译： 一种用于光盘的记录和/或再现装置，其中可以抑制跟踪伺服控制中的环路增益变化，以使照明激光正确地跟随记录轨道中心。 光盘记录/再现装置1检测在跟踪伺服拉入时激光穿过轨道时产生的横移信号，并设置GCA4的放大度，使得推挽信号将处于预定的 水平。 光盘记录/再现装置1将摆动信号的幅度保持在存储器上作为初始设定值。 在开始记录或再现时，光盘记录/再现装置1在记录或再现期间监视摆动信号的振幅，以将振幅与初始设定值进行比较。 光盘记录/再现装置1将放大度设置为满足摆动信号的增加或减小的比率以控制GCA 4和推挽信号的增益。

公开(公告)号：US06707261B2

公开(公告)日：2004-03-16

申请号：US10379487

申请日：2003-03-04

申请人： Masayasu Ito ,  Shinji Ohta

发明人： Masayasu Ito ,  Shinji Ohta

IPC分类号： H05B3700

CPC分类号： H05B41/2887 ,  H05B41/2886 ,  Y02B20/202 ,  Y10S315/05 ,  Y10S315/07

摘要： In a discharge lamp lighting circuit having a DC-AC converter circuit, a circuit for generating a driving voltage for the DC-AC converter circuit is simplified and cost and power losses are reduced. A discharge lamp lighting circuit 1 has a DC-DC converter circuit 3 for converting an input voltage from a DC power source 2 to a required DC voltage, a DC-AC converter circuit 4 disposed down-circuit of the DC-DC converter circuit and having a bridge-type construction using a plurality of switching devices, and a control circuit 7 for performing lighting control of a discharge lamp 6. A voltage generated from a power supply voltage to the control circuit 7 by a driving voltage generating part 9B is supplied as the driving voltage of the DC-AC converter circuit 4.

摘要翻译： 在具有DC-AC转换器电路的放电灯点亮电路中，简化了用于产生DC-AC转换器电路的驱动电压的电路，并降低了成本和功率损耗。 放电灯点亮电路1具有用于将来自直流电源2的输入电压转换为所需直流电压的DC-DC转换电路3，设置在DC-DC转换器电路的下电路的DC-AC转换电路4，以及 具有使用多个开关装置的桥式结构，以及用于进行放电灯6的点亮控制的控制电路7.供给通过驱动电压产生部9B从控制电路7向电源电压产生的电压 作为DC-AC转换器电路4的驱动电压。

公开(公告)号：US5353305A

公开(公告)日：1994-10-04

申请号：US465225

申请日：1990-02-14

申请人： Misao Fukuda ,  Shinji Ohta ,  Seiji Miyoshi ,  Seiichi Yamato ,  Kazuyoshi Maruyama ,  Yutaka Awata ,  Kinji Kawada

发明人： Misao Fukuda ,  Shinji Ohta ,  Seiji Miyoshi ,  Seiichi Yamato ,  Kazuyoshi Maruyama ,  Yutaka Awata ,  Kinji Kawada

IPC分类号： H04B3/23 ,  H03H7/30

CPC分类号： H04B3/145 ,  H04B3/238 ,  H04B3/231 ,  H04B3/235

摘要： An initial gain of an automatic equalizer is fixed to a predetermined value. Then, the most appropriate gain of the automatic equalizer is determined when a training signal is received by the automatic equalizer. An echo replica signal produced by an echo canceler is multiplied by the value obtained by dividing the most appropriate gain by the initial gain. Thus, the echo replica signal is corrected to cancel the echo signal included in the output of the automatic equalizer. The sampling rate of the A/D converter used in the transmitter and receiver is shifted by a predetermined value from the transmission line rate at an initial training stage. Thereafter, the sampling rate of the A/D converter is determined to be near that of the transmission line.

摘要翻译： PCT No.PCT / JP89 / 00595 Sec。 371 1990年2月14日第 102（e）1990年2月14日PCT PCT。1989年6月14日PCT公布。 第WO89 / 12934号公报 日期为1989年12月28日。自动均衡器的初始增益固定为预定值。 然后，当自动均衡器接收到训练信号时，确定自动均衡器最合适的增益。 由回波消除器产生的回波复制信号乘以通过将最适当的增益除以初始增益而获得的值。 因此，校正回波复制信号以消除包括在自动均衡器的输出中的回波信号。 在发射机和接收机中使用的A / D转换器的采样率在初始训练阶段从传输线路速率偏移预定值。 此后，A / D转换器的采样率被确定为接近传输线的采样率。

公开(公告)号：US07557513B2

公开(公告)日：2009-07-07

申请号：US11780125

申请日：2007-07-19

申请人： Shinji Ohta ,  Tomoyuki Ichikawa

发明人： Shinji Ohta ,  Tomoyuki Ichikawa

IPC分类号： H05B41/00

CPC分类号： H05B41/288

摘要： A lighting circuit includes a capacitor and inductor for a resonance, and a first output, a second output, a resistor and a monitor circuit. A DC-AC converting circuit generates an AC voltage from a DC voltage. The resistor has an end connected to the second output and the other end connected to an end of a secondary winding. A monitoring output is connected to the other end of the resistor, and is provided for providing a signal for monitoring a current flowing to a discharge lamp. The end of the resistor is connected to a grounding conductor GND. The monitor circuit receives a signal from the monitoring output. The monitor circuit generates a signal for monitoring a current IL flowing to the discharge lamp.

摘要翻译： 照明电路包括用于谐振的电容器和电感器，以及第一输出，第二输出，电阻器和监视器电路。 DC-AC转换电路从直流电压产生交流电压。 电阻器的端部连接到第二输出端，另一端连接到次级绕组的一端。 监视输出连接到电阻器的另一端，并被提供用于提供用于监视流向放电灯的电流的信号。 电阻的末端连接到接地导体GND。 监控电路接收来自监视输出的信号。 监视电路产生用于监视流向放电灯的电流IL的信号。