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：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：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：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：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：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。

公开(公告)号：US06826063B2

公开(公告)日：2004-11-30

申请号：US10375025

申请日：2003-02-28

申请人： Tomoyuki Ichikawa ,  Shinji Ohta

发明人： Tomoyuki Ichikawa ,  Shinji Ohta

IPC分类号： H03B324

CPC分类号： H05B41/2886 ,  H02M3/33507 ,  Y02B20/202

摘要： Control is carried out in such a manner that a transformer 10 constituting a DC voltage converting circuit 15 stores energy while a switching element 11 provided on the primary side of the transformer 10 is set in an ON state, and the transformer 10 outputs the energy while the switching element 11 is set in an OFF state, and furthermore, the switching element 11 is turned ON when the energy is completely output from a secondary winding 10s. For this purpose, a duration from a time that a secondary current I2 of the transformer 10 reaches zero to a time that a primary current Ip of the transformer 10 is started to flow is detected, and a switching frequency is changed by control means 16 in order to shorten the duration.

摘要翻译： 以构成直流电压转换电路15的变压器10在设置在变压器10的初级侧的开关元件11设定为接通状态的同时存储能量的方式进行控制，变压器10输出能量，同时 开关元件11被设定为断开状态，此外，当能量从次级绕组10s完全输出时，开关元件11导通。 为此，检测从变压器10的次级电流I2达到零到变压器10的初级电流Ip开始流动的时间的持续时间，并且通过控制装置16改变开关频率 为了缩短持续时间。

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。