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    • 3. 发明申请
    • DISCHARGE LAMP CONTROL DEVICE AND PROJECTOR
    • 放电灯控制装置和投影仪
    • US20080198337A1
    • 2008-08-21
    • US12028783
    • 2008-02-09
    • Kenichi Kitagawa
    • Kenichi Kitagawa
    • G03B21/14H05B41/26
    • H05B41/2887G03B21/2026Y02B20/202
    • A discharge lamp control device includes: a discharge lamp driver section which drives a lamp; and a discharge lamp drive control section which performs constant current control so that a discharge lamp current that flows between electrodes of the lamp becomes constant when a discharge lamp voltage applied between the electrodes of the lamp is lower than a first voltage, and performs constant power control so that an amount of power supplied to the lamp becomes constant when the discharge lamp voltage is equal to or higher than the first voltage after the lamp has been lighted. The discharge lamp drive control section includes a discharge lamp drive frequency control section which causes the drive frequency when the discharge lamp voltage is lower than a second voltage which is equal to or lower than the first voltage to be lower than the drive frequency when the discharge lamp voltage is higher than the second voltage.
    • 放电灯控制装置包括:驱动灯的放电灯驱动器部; 以及放电灯驱动控制部,其在施加在所述灯的电极之间的放电灯电压低于第一电压时,进行恒定电流控制,使得在所述灯的电极之间流动的放电灯电流变得恒定,并且执行恒定功率 控制使得当灯点亮之后,当放电灯电压等于或高于第一电压时,供应给灯的功率量变得恒定。 放电灯驱动控制部分包括放电灯驱动频率控制部分,当放电灯电压低于等于或低于第一电压的第二电压时,使驱动频率低于放电时的驱动频率 灯电压高于第二电压。
    • 4. 发明申请
    • DISCHARGE LAMP LIGHTING DEVICE
    • 放电灯照明装置
    • US20110187288A1
    • 2011-08-04
    • US13015811
    • 2011-01-28
    • Takumi HorikawaKikuro SasayamaKenichi Kitagawa
    • Takumi HorikawaKikuro SasayamaKenichi Kitagawa
    • H05B41/36
    • H05B41/36Y02B20/183
    • A discharge lamp lighting device capable of preventing magnetic saturation of an inductor connected with an output of an inverter. An inverter 12 comprises a first set of switching elements 32, 33 for switching an output voltage of the inverter 12 to a positive polarity and a second set of switching elements 31, 34 for switching the output voltage thereof to a negative polarity. At the start-up of a lamp 20, each of the switching elements 31 to 34 is allowed to perform switching operations in such a pattern that after turning on and off the first set of the switching elements 32, 33 more than once, the second set of switching elements 31, 34 are allowed to turn or and off more than once. Accordingly, energy stored in the inductor 37 is discharged during a temporary off-period, thus permitting the inductor 37 to be prevented from being magnetically saturated.
    • 一种能够防止与逆变器的输出相连的电感器的磁饱和的放电灯点亮装置。 逆变器12包括用于将逆变器12的输出电压切换为正极性的第一组开关元件32,33和用于将其输出电压切换为负极性的第二组开关元件31,34。 在灯20启动时,允许开关元件31至34中的每一个执行切换操作,使得在第一组开关元件32,33接通和断开不止一次之后,第二 允许一组开关元件31,34多次转动或关闭。 因此,存储在电感器37中的能量在临时关断期间被放电,从而允许电感器37被磁饱和。
    • 5. 发明授权
    • Discharge lamp control device and projector
    • 放电灯控制装置和投影机
    • US07932680B2
    • 2011-04-26
    • US12028784
    • 2008-02-09
    • Kenichi Kitagawa
    • Kenichi Kitagawa
    • H05B37/02
    • H05B41/2883G03B21/2026G03B21/206H05B41/2928H05B41/382H05B41/3925Y02B20/208
    • A discharge lamp control device includes: a discharge lamp driver section which drives a lamp; and a discharge lamp drive control section which performs constant current control so that a discharge lamp current that flows between electrodes of the lamp becomes constant when a discharge lamp voltage applied between the electrodes of the lamp is lower than a first voltage after the lamp has been lighted. The discharge lamp drive control section performs constant power control so that an amount of power supplied to the lamp becomes constant when the lamp voltage is equal to or higher than the first voltage and is equal to or lower than a predetermined voltage which is higher than the first voltage after the discharge lamp has been lighted; and the discharge lamp drive control section reduces the amount of power supplied to the lamp according to an increase in the discharge lamp voltage when the discharge lamp voltage is higher than the predetermined voltage after the lamp has been lighted.
    • 放电灯控制装置包括:驱动灯的放电灯驱动器部; 以及放电灯驱动控制部,其进行恒定电流控制,使得当在灯的电极之间施加的放电灯电压低于灯之后的第一电压时,在灯的电极之间流动的放电灯电流变得恒定 点亮 放电灯驱动控制部进行恒定的功率控制,使得当灯电压等于或高于第一电压时,供给灯的功率量变得恒定,并且等于或低于高于第一电压的预定电压 放电灯点亮后的第一电压; 并且放电灯驱动控制部分在放电灯电压高于灯已经点亮之后的预定电压时,根据放电灯电压的增加来减少提供给灯的功率。
    • 7. 发明授权
    • Discharge lamp control device controlling lighting of a discharge lamp, and projector using the same
    • 放电灯控制装置控制放电灯的照明,以及使用其的投影仪
    • US07845806B2
    • 2010-12-07
    • US12028783
    • 2008-02-09
    • Kenichi Kitagawa
    • Kenichi Kitagawa
    • G03B21/14
    • H05B41/2887G03B21/2026Y02B20/202
    • A discharge lamp control device includes: a discharge lamp driver section which drives a lamp; and a discharge lamp drive control section which performs constant current control so that a discharge lamp current that flows between electrodes of the lamp becomes constant when a discharge lamp voltage applied between the electrodes of the lamp is lower than a first voltage, and performs constant power control so that an amount of power supplied to the lamp becomes constant when the discharge lamp voltage is equal to or higher than the first voltage after the lamp has been lighted. The discharge lamp drive control section includes a discharge lamp drive frequency control section which causes the drive frequency when the discharge lamp voltage is lower than a second voltage which is equal to or lower than the first voltage to be lower than the drive frequency when the discharge lamp voltage is higher than the second voltage.
    • 放电灯控制装置包括:驱动灯的放电灯驱动器部; 以及放电灯驱动控制部,其在施加在所述灯的电极之间的放电灯电压低于第一电压时,进行恒定电流控制,使得在所述灯的电极之间流动的放电灯电流变得恒定,并且执行恒定功率 控制使得当灯点亮之后,当放电灯电压等于或高于第一电压时,供应给灯的功率量变得恒定。 放电灯驱动控制部分包括放电灯驱动频率控制部分,当放电灯电压低于等于或低于第一电压的第二电压时,使驱动频率低于放电时的驱动频率 灯电压高于第二电压。
    • 8. 发明申请
    • DISCHARGE LAMP CONTROL DEVICE AND PROJECTOR
    • 放电灯控制装置和投影仪
    • US20080192211A1
    • 2008-08-14
    • US12028784
    • 2008-02-09
    • Kenichi Kitagawa
    • Kenichi Kitagawa
    • G03B21/14H05B41/36
    • H05B41/2883G03B21/2026G03B21/206H05B41/2928H05B41/382H05B41/3925Y02B20/208
    • A discharge lamp control device includes: a discharge lamp driver section which drives a lamp; and a discharge lamp drive control section which performs constant current control so that a discharge lamp current that flows between electrodes of the lamp becomes constant when a discharge lamp voltage applied between the electrodes of the lamp is lower than a first voltage after the lamp has been lighted. The discharge lamp drive control section performs constant power control so that an amount of power supplied to the lamp becomes constant when the lamp voltage is equal to or higher Man the first voltage and is equal to or lower than a predetermined voltage which is higher than the first voltage after the discharge lamp has been lighted; and the discharge lamp drive control section reduces the amount of power supplied to the lamp according to an increase in the discharge lamp voltage when the discharge lamp voltage is higher than the predetermined voltage after the lamp has been lighted.
    • 放电灯控制装置包括:驱动灯的放电灯驱动器部; 以及放电灯驱动控制部,其进行恒定电流控制,使得当在灯的电极之间施加的放电灯电压低于灯之后的第一电压时,在灯的电极之间流动的放电灯电流变得恒定 点亮 放电灯驱动控制部进行恒定的功率控制,使得当灯电压等于或等于等于或等于1时,供给灯的功率量变得恒定,并且等于或低于高于 放电灯点亮后的第一电压; 并且放电灯驱动控制部分在放电灯电压高于灯已经点亮之后的预定电压时,根据放电灯电压的增加来减少提供给灯的功率。
    • 9. 发明授权
    • Discharge lamp lighting device
    • 放电灯照明装置
    • US08513903B2
    • 2013-08-20
    • US13015811
    • 2011-01-28
    • Takumi HorikawaKikuro SasayamaKenichi Kitagawa
    • Takumi HorikawaKikuro SasayamaKenichi Kitagawa
    • H05B41/36
    • H05B41/36Y02B20/183
    • A discharge lamp lighting device capable of preventing magnetic saturation of an inductor connected with an output of an inverter. An inverter 12 comprises a first set of switching elements 32, 33 for switching an output voltage of the inverter 12 to a positive polarity and a second set of switching elements 31, 34 for switching the output voltage thereof to a negative polarity. At the start-up of a lamp 20, each of the switching elements 31 to 34 is allowed to perform switching operations in such a pattern that after turning on and off the first set of the switching elements 32, 33 more than once, the second set of switching elements 31, 34 are allowed to turn or and off more than once. Accordingly, energy stored in the inductor 37 is discharged during a temporary off-period, thus permitting the inductor 37 to be prevented from being magnetically saturated.
    • 一种能够防止与逆变器的输出相连的电感器的磁饱和的放电灯点亮装置。 逆变器12包括用于将逆变器12的输出电压切换为正极性的第一组开关元件32,33和用于将其输出电压切换为负极性的第二组开关元件31,34。 在灯20启动时,允许开关元件31至34中的每一个执行切换操作,使得在第一组开关元件32,33接通和断开不止一次之后,第二 允许一组开关元件31,34多次转动或关闭。 因此,存储在电感器37中的能量在临时关断期间被放电,从而允许电感器37被磁饱和。