公开(公告)号：US07196912B2

公开(公告)日：2007-03-27

申请号：US11223538

申请日：2005-09-09

申请人： Shinji Ohta ,  Tomoyuki Ichikawa

发明人： Shinji Ohta ,  Tomoyuki Ichikawa

IPC分类号： H02M3/335

CPC分类号： H05B41/2921 ,  H05B41/2883

摘要： In a lighting apparatus for a discharge lamp, a mask signal against a re-arc voltage is correctly generated to detect a lamp voltage accurately in view of a support to high frequency lighting such that the detection of the lamp voltage is not affected by the re-arc voltage. The lighting apparatus for the discharge lamp comprises a DC-AC converter for receiving an input voltage from a DC power supply to convert the input voltage to an AC voltage; detecting means for detecting a lamp voltage associated with a discharge lamp or a lamp voltage and a lamp current; and a signal generator circuit for generating a mask signal for excluding a re-arc voltage, which occurs at the time the polarity is inverted, from items to be detected, in the event of a detection of the lamp voltage. The signal generator circuit detects the lamp voltage or lamp current or a voltage at an output stage of the DC-AC converter to correctly capture a polarity inversion timing to generate a mask signal against the re-arc voltage. A timing shift of the mask signal can be limited within an allowable range even if the discharge lamp is lit at a high frequency.

摘要翻译： 在用于放电灯的照明装置中，正确地产生抵抗再电弧电压的掩模信号，以便在对高频照明的支持方面准确地检测灯电压，使得灯电压的检测不受再次的影响 -arc电压。 用于放电灯的照明装置包括DC-AC转换器，用于从DC电源接收输入电压以将输入电压转换为AC电压; 用于检测与放电灯相关联的灯电压或灯电压和灯电流的检测装置; 以及信号发生器电路，用于在检测到灯电压的情况下产生用于排除在极性反转时发生的再电弧电压的掩模信号。 信号发生器电路检测灯电压或灯电流或DC-AC转换器的输出级的电压，以正确捕获极性反转定时，以产生抵抗电弧电压的掩模信号。 即使放电灯以高频点亮，掩模信号的定时偏移也可以被限制在容许范围内。

公开(公告)号：US07176638B2

公开(公告)日：2007-02-13

申请号：US10385679

申请日：2003-03-12

申请人： Masayasu Ito ,  Shinji Ohta

发明人： Masayasu Ito ,  Shinji Ohta

IPC分类号： G05F1/00

CPC分类号： H05B41/2926 ,  H05B41/2886 ,  Y02B20/202 ,  Y02B20/208 ,  Y10S315/07

摘要： A discharge lamp lighting circuit has a structure of a voltage resonance type including a transformer and a switching element to be provided on a primary side thereof as a DC—DC converting circuit for converting a DC input voltage into a desirable DC voltage. The lighting circuit further includes a control circuit serving to ON/OFF control the switching element, thereby controlling an output voltage Vout of the DC—DC converting circuit, and has a function of a current limitation related to the switching element. In the lighting circuit, if the output voltage Vout is raised, a current flowing to the switching element is limited to be decreased. Consequently, a voltage applied to the switching element can be suppressed, and furthermore, the winding ratio of the transformer does not need to be increased. Accordingly, it is possible to prevent an electrical efficiency from being deteriorated.

摘要翻译： 放电灯点亮电路具有包括变压器和开关元件的电压共振型结构，作为用于将直流输入电压转换成期望的直流电压的DC-DC转换电路。 点亮电路还包括用于对开关元件进行ON / OFF控制的控制电路，从而控制DC-DC转换电路的输出电压Vout，并且具有与开关元件相关的电流限制的功能。 在点亮电路中，如果输出电压Vout升高，则流向开关元件的电流被限制为减小。 因此，可以抑制施加到开关元件的电压，此外，变压器的绕组比不需要增加。 因此，可以防止电效率劣化。

公开(公告)号：US07075806B2

公开(公告)日：2006-07-11

申请号：US10861297

申请日：2004-06-04

申请人： Tomoyuki Ichikawa ,  Shinji Ohta

发明人： Tomoyuki Ichikawa ,  Shinji Ohta

IPC分类号： H02M5/24

CPC分类号： H02M3/1563 ,  H05B41/282 ,  H05B41/2886 ,  Y02B20/183 ,  Y02B20/202

摘要： In a fly-back DC voltage conversion circuit, a transformer accumulates energy during the on-state of a switching element, and the accumulated energy is outputted from a secondary winding during the off-state of the switching element. The switching element is placed in the on-state when the accumulated energy is completely outputted from the secondary winding. A voltage applied to the switching element is differentiated by a capacitor to detect a discharge termination point at which the current of the transformer becomes zero to change a switching frequency of the switching element. The DC voltage conversion circuit can attain control in a current boundary state without significantly increasing cost.

摘要翻译： 在回扫直流电压转换电路中，变压器在开关元件的导通状态下蓄积能量，并且在开关元件的截止状态期间从次级绕组输出累积的能量。 当累积能量从次级绕组完全输出时，开关元件置于导通状态。 施加到开关元件的电压由电容器区分，以检测变压器的电流为零的放电终止点，以改变开关元件的开关频率。 直流电压转换电路可以在当前边界状态下获得控制，而不会显着增加成本。

公开(公告)号：US20060055346A1

公开(公告)日：2006-03-16

申请号：US11223538

申请日：2005-09-09

申请人： Shinji Ohta ,  Tomoyuki Ichikawa

发明人： Shinji Ohta ,  Tomoyuki Ichikawa

IPC分类号： H05B41/36

CPC分类号： H05B41/2921 ,  H05B41/2883

摘要： In a lighting apparatus for a discharge lamp, a mask signal against a re-arc voltage is correctly generated to detect a lamp voltage accurately in view of a support to high frequency lighting such that the detection of the lamp voltage is not affected by the re-arc voltage. The lighting apparatus for the discharge lamp comprises a DC-AC converter for receiving an input voltage from a DC power supply to convert the input voltage to an AC voltage; detecting means for detecting a lamp voltage associated with a discharge lamp or a lamp voltage and a lamp current; and a signal generator circuit for generating a mask signal for excluding a re-arc voltage, which occurs at the time the polarity is inverted, from items to be detected, in the event of a detection of the lamp voltage. The signal generator circuit detects the lamp voltage or lamp current or a voltage at an output stage of the DC-AC converter to correctly capture a polarity inversion timing to generate a mask signal against the re-arc voltage. A timing shift of the mask signal can be limited within an allowable range even if the discharge lamp is lit at a high frequency.

摘要翻译： 在用于放电灯的照明装置中，正确地产生抵抗再电弧电压的掩模信号，以便在对高频照明的支持方面准确地检测灯电压，使得灯电压的检测不受再次的影响 -arc电压。 用于放电灯的照明装置包括DC-AC转换器，用于从DC电源接收输入电压以将输入电压转换为AC电压; 用于检测与放电灯相关联的灯电压或灯电压和灯电流的检测装置; 以及信号发生器电路，用于在检测到灯电压的情况下产生用于排除在极性反转时发生的再电弧电压的掩模信号。 信号发生器电路检测灯电压或灯电流或DC-AC转换器的输出级的电压，以正确捕获极性反转定时，以产生抵抗电弧电压的掩模信号。 即使放电灯以高频点亮，掩模信号的定时偏移也可以被限制在容许范围内。

公开(公告)号：US20060049774A1

公开(公告)日：2006-03-09

申请号：US11212552

申请日：2005-08-25

申请人： Tomoyuki Ichikawa ,  Shinji Ohta

发明人： Tomoyuki Ichikawa ,  Shinji Ohta

IPC分类号： H05B37/02

CPC分类号： H05B41/2921 ,  G01R19/04

摘要： A peak detecting circuit 1 comprises an operational amplifier 2, a plurality of transistors 3 and 4 to be operated upon receipt of an output signal, and a holding capacitor 5. The transistors 3 and 4 are used as emitter followers or source followers, and the output signal of the transistor 3 is input to the operational amplifier 2 to obtain a negative feedback and the output signal of the transistor 3 is supplied to the capacitor 5. Moreover, a discharging resistor is provided in parallel with the capacitor 5 to intentionally provide a droop. Consequently, it is possible to follow a variation in the peak of an input signal which is changed momentarily.

摘要翻译： 峰值检测电路1包括运算放大器2，在接收到输出信号时被操作的多个晶体管3和4以及保持电容器5.晶体管3和4用作发射极跟随器或源极跟随器，并且 晶体管3的输出信号被输入到运算放大器2以获得负反馈，并且晶体管3的输出信号被提供给电容器5.此外，与电容器5并联设置放电电阻器，以有意地提供 下垂 因此，可以跟随瞬时变化的输入信号的峰值的变化。

公开(公告)号：US06246649B1

公开(公告)日：2001-06-12

申请号：US09201437

申请日：1998-11-30

申请人： Shinji Ohta ,  Hitoshi Sakaguchi ,  Kazushi Yoshikawa

发明人： Shinji Ohta ,  Hitoshi Sakaguchi ,  Kazushi Yoshikawa

IPC分类号： G11B700

CPC分类号： G11B27/24 ,  G11B7/005 ,  G11B20/14 ,  G11B27/3027 ,  G11B2020/1269 ,  G11B2220/218 ,  G11B2220/2545

摘要： The optical disc reproducing apparatus comprises an ATIP demodulator which is supplied, from a matrix amplifier, with a wobble signal incorporating an address information in a modulated component thereof. In the ATIP demodulator, the free-run frequencies of the pair of VCOs change correspondingly to a moved position of a sled. Therefore, the ATIP demodulator can work well even if the carrier frequency of the wobble signal changes.

摘要翻译： 光盘重放装置包括一个ATIP解调器，它从矩阵放大器提供一个摆放信号，该摆动信号在其调制分量中包含一个地址信息。 在ATIP解调器中，一对VCO的自由运行频率相应地改变为滑架的移动位置。 因此，即使摆动信号的载波频率发生变化，ATIP解调器也能正常工作。

公开(公告)号：US08120264B2

公开(公告)日：2012-02-21

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： H05B37/00

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：US07397197B2

公开(公告)日：2008-07-08

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：US07005808B2

公开(公告)日：2006-02-28

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： H05B37/02 ,  G05F1/00

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，其在接收到DC输入时实现DC-AC转换和升压，以及起动电路4。 通过控制装置6控制来自DC-AC转换电路3的输出功率。 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激活，从而在谐振电容器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与连接到谐振电容器8的电感元件9之间产生串联谐振。 假设在放电灯10的消光周期期间实现的谐振频率被表示为f 1，则将工作频率首先调节到与f 1不同的频率电平，然后逐渐减小，以便接近f 1 在照明之前施加到放电灯的负载电压。

公开(公告)号：US20050062443A1

公开(公告)日：2005-03-24

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： H05B41/24 ,  H05B37/03 ,  H05B41/28 ,  H05B41/288 ,  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。