公开(公告)号：US07656102B2

公开(公告)日：2010-02-02

申请号：US11840311

申请日：2007-08-17

申请人： Takao Muramatsu ,  Tomoyuki Ichikawa

发明人： Takao Muramatsu ,  Tomoyuki Ichikawa

IPC分类号： G05F1/00

CPC分类号： H05B41/2882

摘要： A discharge lamp lighting circuit includes a power supplying portion having a series resonant circuit containing transistors and a bridge driver, and a control portion for generating a control signal Sc1 to control a driving frequency of the bridge driver. The control portion has a sample hold portion for generating a constant control signal S1, a frequency follow-up control portion for generating a control signal S2 in such a manner that a phase difference between a voltage and a current in the series resonant circuit is approximately zero, and a power control portion for generating a control signal S3 in such a manner that a magnitude of an AC power approximates a steady value. The control signal S1 is selected from a time t3 to a time t4, the control signal S2 is selected from the time t4 to a time t5, and the control signal S3 sent from the power control portion 13 is selected as the control signal Sc1 after the time t5.

摘要翻译： 放电灯点亮电路包括具有包含晶体管的串联谐振电路和桥式驱动器的电力供给部，以及用于产生用于控制桥式驱动器的驱动频率的控制信号Sc1的控制部。 控制部分具有用于产生恒定控制信号S1的采样保持部分，用于产生控制信号S2的频率跟随控制部分，使得串联谐振电路中的电压和电流之间的相位差近似 以及功率控制部分，用于以使得AC功率的大小近似于稳定值的方式产生控制信号S3。 控制信号S1从时间t3到时间t4选择，控制信号S2从时间t4到时间t5被选择，并且从功率控制部分13发送的控制信号S3被选择为后面的控制信号Sc1 时间t5。

公开(公告)号：US07378802B2

公开(公告)日：2008-05-27

申请号：US11446887

申请日：2006-06-05

申请人： Tomoyuki Ichikawa ,  Takao Muramatsu

发明人： Tomoyuki Ichikawa ,  Takao Muramatsu

IPC分类号： H05B37/02

CPC分类号： H05B41/2881

摘要： A circuit includes a transformer 7 for transmitting power to a discharge lamp 10 and for supplying a starting signal to the discharge lamp. The circuit includes a direct current-alternating current converting circuit 3 for supplying an output of the transformer 7 to the discharge lamp 10 after carrying out a direct current-alternating current conversion, and a starting circuit 4 for applying the starting signal to the discharge lamp 10. A primary side of the transformer 7 has a first capacitor 11, a circuit portion 13 including a rectifying element, and a switching element 14. The transformer 7 has an auxiliary winding 7v for supplying a voltage for generating the starting signal to the starting circuit. A second capacitor 12 is interposed between the auxiliary winding and the circuit portion 13 and prevents absorption of energy by the capacitor 11 in generating the starting signal and prevents attenuation of the starting signal.

摘要翻译： 电路包括用于向放电灯10发送电力并向放电灯提供启动信号的变压器7。 该电路包括直流电流转换电路3，用于在进行直流电流转换之后将变压器7的输出端提供给放电灯10;以及启动电路4，用于将启动信号施加到放电灯 变压器7的初级侧具有第一电容器11，包括整流元件的电路部分13和开关元件14。 变压器7具有用于向起动电路提供用于产生起动信号的电压的辅助绕组7v。 第二电容器12介于辅助绕组和电路部分13之间，并且在产生启动信号时防止电容器11吸收能量并防止启动信号的衰减。

公开(公告)号：US20070007913A1

公开(公告)日：2007-01-11

申请号：US11484804

申请日：2006-07-10

申请人： Tomoyuki Ichikawa ,  Takao Muramatsu

发明人： Tomoyuki Ichikawa ,  Takao Muramatsu

IPC分类号： H05B41/36

CPC分类号： H05B41/2883

摘要： A discharge lamp lighting circuit 1 is provided with a DC-AC conversion circuit 3 having a plurality of switching elements 5H, 5L and a series resonance circuit (8, 9, 7p), and control means 17 for preventing a situation in which the drive frequency of the switching element remains less than its specified minimum frequency. When the discharge lamp is lit, driving control of the switching element is carried out in a frequency range higher than the series resonance frequency. By using a driving situation detection circuit 15, a driving situation of the switching element is monitored based on a relation with a phase of a lamp current which flows through the discharge lamp. If the drive frequency of the switching element becomes less than the specified minimum frequency, the drive frequency is increased, and thereby, a lower limit of the drive frequency is automatically restricted.

摘要翻译： 放电灯点亮电路1设置有具有多个开关元件5H，5L和串联谐振电路（8,9,7p）的DC-AC转换电路3，以及用于防止 开关元件的驱动频率保持小于其规定的最小频率。 当放电灯点亮时，开关元件的驱动控制在高于串联谐振频率的频率范围内进行。 通过使用驱动情况检测电路15，基于与流过放电灯的灯电流的相位的关系来监视开关元件的驱动情况。 如果开关元件的驱动频率变得小于指定的最小频率，则驱动频率增加，从而自动地限制驱动频率的下限。

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：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。