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    • 4. 发明授权
    • Discharge lamp lighting apparatus
    • 放电灯照明装置
    • US08305000B2
    • 2012-11-06
    • US12805339
    • 2010-07-27
    • Takanori SamejimaMasashi Okamoto
    • Takanori SamejimaMasashi Okamoto
    • H05B37/02
    • H05B41/388H05B41/2883Y02B20/204
    • In an optimum frequency detection sequence of a discharge lamp, the frequency control circuit performs a sweep operation in which, while the frequency control circuit monitors a synchronization degree signal, a frequency control signal is changed, so that frequency is changed, starting from either an upper or lower limit frequency of a periodic driving circuit, in a range that does not exceed the other frequency, wherein after completion of the sweep operation, the frequency control circuit determines a value of the frequency control signal corresponding to a resonance frequency of the resonant circuit, and inputs the value into a frequency driving circuit, wherein at least in a period of the sweep operation, an inverter receives power supply from a sweep time power supply circuit for supplying electric power with constant supply capability, which is limited to a range in which breakdown does not occur in the discharge lamp.
    • 在放电灯的最佳频率检测顺序中,频率控制电路执行扫频操作,其中,当频率控制电路监视同步度信号时,频率控制信号被改变,使得频率从 在不超过其他频率的范围内的周期性驱动电路的上限或下限频率,其中在扫描操作完成之后,频率控制电路确定对应于谐振的谐振频率的频率控制信号的值 电路,并将该值输入到频率驱动电路中,其中至少在扫描操作期间,逆变器从扫频时间电源电路接收供电电力,用于提供具有恒定供电能力的电力,该功率限制在一定范围内 在放电灯中不发生击穿。
    • 5. 发明申请
    • Discharge lamp light apparatus
    • 放电灯灯具
    • US20110127926A1
    • 2011-06-02
    • US12926621
    • 2010-11-30
    • Takanori SamejimaMasashi Okamoto
    • Takanori SamejimaMasashi Okamoto
    • H05B41/36
    • H05B41/2886H05B41/2925
    • A discharge lamp lighting apparatus for lighting a discharge lamp where a voltage generated in a secondary side winding can be superimposed on an output voltage of an inverter and is impressed between electrodes, where while a periodic drive circuit generates an inverter drive signal so that frequency of the inverter becomes a start-up initial frequency, electric supply control circuit controls a power supply circuit to output no-load opening voltage, where the frequency of the inverter gradually decreases until reaching a first threshold frequency from the start-up initial frequency, where when the frequency of the inverter reaches the first threshold frequency, the periodic drive circuit generates the inverter drive signal so that the frequency of the inverter becomes stable lighting frequency, and where the electric supply control circuit controls the power supply circuit to output current which is sufficient to maintain electric discharge of the discharge lamp.
    • 一种用于点亮放电灯的放电灯点亮装置,其中二次侧绕组中产生的电压可以叠加在逆变器的输出电压上并被施加在电极之间,其中周期性驱动电路产生逆变器驱动信号,使得频率 逆变器成为启动初始频率,电源控制电路控制电源电路输出空载开路电压,其中逆变器的频率逐渐减小,直到从启动初始频率到达第一阈值频率,其中 当逆变器的频率达到第一阈值频率时,周期性驱动电路产生逆变器驱动信号,使得逆变器的频率变得稳定的点亮频率,并且在电源控制电路控制电源电路输出电流为 足以保持放电灯的放电。
    • 7. 发明申请
    • Discharge lamp lighting apparatus and projector
    • 放电灯照明设备和投影机
    • US20070188113A1
    • 2007-08-16
    • US11704984
    • 2007-02-12
    • Masashi Okamoto
    • Masashi Okamoto
    • H05B41/36
    • H05B41/2882
    • In a lamp lighting apparatus for lighting a high intensity discharge lamp, which is used for a projector, it is possible to carry out high speed modulation of brightness of the discharge lamp, in synchronization with a conversion operation to sequential color light flux which is carried out by using a dynamic filter such as a rotation color wheel, and it is also possible to switch modulation patterns by electric control. A lamp current detection signal conversion circuit has two or more switching elements whose ON/OFF state is controlled corresponding to truth/false of respective bits of modulation signal, in which a gain can be changed by a combination of truth and false of the respective bits of the modulation signal. When a modulation switching timing signal is received, an original modulation signal is updated by selecting a bit set corresponding to a value counted by a modulation change count section.
    • 在用于照明用于投影仪的高亮度放电灯的灯具照明装置中,可以与携带的顺序彩色光通量的转换操作同步地执行放电灯的亮度的高速调制 通过使用诸如旋转色轮的动态滤波器,并且还可以通过电控制来切换调制图案。 灯电流检测信号转换电路具有两个以上的开关元件,其开关状态根据调制信号的各个比特的真/假来控制,其中增益可以通过各位的真值和错误的组合而改变 的调制信号。 当接收到调制切换定时信号时,通过选择与由调制变化计数部分计数的值相对应的位来更新原始调制信号。
    • 10. 发明授权
    • DC—DC converter and device for operation of a high pressure discharge lamp using the converter
    • DC-DC转换器和使用该转换器操作高压放电灯的装置
    • US07012381B2
    • 2006-03-14
    • US10887346
    • 2004-07-09
    • Takanori SamejimaMasashi OkamotoYoshikazu Suzuki
    • Takanori SamejimaMasashi OkamotoYoshikazu Suzuki
    • H05B37/02
    • H02M1/34H02M1/08H02M3/156H02M2001/007H02M2001/342H05B41/2886Y02B20/202Y02B70/1491
    • A low cost DC-DC converter facilitates a reduction of the switching loss in the wide, variable range of the continuity ratio for a main switching device. The DC-DC converter includes a direct current source, an ON-OFF-controllable main switching device, a main coil which is series connected to the main switching device, a fly-wheel diode which is arranged such that the induction current of the main coil flows when the main switching device is shifted into the OFF state, and a smoothing capacitor for smoothing the output of the main coil, Also included is an auxiliary transformer with a primary winding as a direct current source and a secondary winding. The main switching device and the auxiliary switching device are controlled such that they are shifted alternatively into the ON state, and the main switching device, is shifted into the ON state a given time after the auxiliary switching device has been shifted into the OFF state.
    • 低成本DC-DC转换器有助于在主开关器件的连续性比较宽的可变范围内降低开关损耗。 DC-DC转换器包括直流电源,ON-OFF控制主开关装置,与主开关装置串联连接的主线圈,其布置成使主电感器的感应电流 当主开关器件移入OFF状态时,线圈流动,并且用于平滑主线圈的输出的平滑电容器。还包括具有初级绕组作为直流源和次级绕组的辅助变压器。 控制主开关装置和辅助开关装置,使得它们被交替地移动到接通状态,并且主开关装置在辅助开关装置已经被切换到关闭状态之后的给定时间内被转换到接通状态。