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    • 62. 发明授权
    • LED lighting device and illumination apparatus including same
    • LED照明装置及包括其的照明装置
    • US08836239B2
    • 2014-09-16
    • US13324219
    • 2011-12-13
    • Katunobu HamamotoMasafumi YamamotoKeisuke UedaHisaya Takikita
    • Katunobu HamamotoMasafumi YamamotoKeisuke UedaHisaya Takikita
    • H05B37/02H05B33/08
    • H05B33/0815
    • An LED lighting device includes a converter for converting a power source voltage into a DC voltage and outputting it to an LED unit; and a controller for controlling an output of the converter. The converter has a chopper circuit including a series circuit of an inductance element and a capacitor; a switching element connected to the inductance element in series and turned on/off by the controller; and a diode as discharging path of the inductance element during an OFF state of the switching element. The controller controls an on/off time of the switching element such that a current supplied to the LED unit during a specific time period after a lighting operation is started becomes smaller than a current supplied to the LED unit in a steady state by using a voltage generated in a secondary coil of the inductance coil as an operating voltage thereof.
    • LED照明装置包括用于将电源电压转换为直流电压并将其输出到LED单元的转换器; 以及用于控制转换器的输出的控制器。 该转换器具有包括电感元件和电容器的串联电路的斩波电路; 串联连接到电感元件并由控制器导通/断开的开关元件; 以及作为开关元件的OFF状态期间的电感元件的放电路径的二极管。 控制器控制开关元件的开/关时间,使得在点亮操作开始之后的特定时间段期间提供给LED单元的电流变得比通过使用电压在稳定状态下提供给LED单元的电流小 在电感线圈的次级线圈中产生的电感线圈作为其工作电压。
    • 65. 发明授权
    • Electronic ballast with multimode lamp power control
    • 电子镇流器具有多模灯功率控制
    • US08253351B2
    • 2012-08-28
    • US12492016
    • 2009-06-25
    • Masafumi YamamotoTetsuya HamanaHiroyuki Asano
    • Masafumi YamamotoTetsuya HamanaHiroyuki Asano
    • G05F1/00
    • H05B41/295H05B41/3925
    • A control means has an adjustment function in a microprocessor to adjust variations in an output to a discharge lamp due to variations in components by correcting a duty ratio of a PWM signal for varying an operating frequency of an inverter circuit so that a detected value of a second detection circuit falls within a target range. The microprocessor switches paths to transmit the PWM signal between a path passing through a feedback circuit and a path passing through a voltage follower circuit by switches a switch circuit to supply the signal through the path passing through the voltage follower circuit in adjusting output variations in the preheating mode and the starting mode.
    • 控制装置在微处理器中具有调整功能,以通过校正用于改变逆变器电路的工作频率的PWM信号的占空比来调整由于分量的变化而导致的对放电灯的输出的变化,使得检测到的 第二检测电路落在目标范围内。 微处理器切换路径,以在通过反馈电路的路径和通过电压跟随器电路的路径之间通过开关电路传输PWM信号,以在通过电压跟随器电路的路径中提供信号,以调整输出变化 预热模式和启动模式。
    • 66. 发明申请
    • LED DRIVER WITH END-OF-LIFE DETECTION CIRCUITRY
    • 具有寿命终止检测电路的LED驱动器
    • US20120187847A1
    • 2012-07-26
    • US13330987
    • 2011-12-20
    • Katsunobu HamamotoMasafumi YamamotoKeisuke UedaHisaya Takikita
    • Katsunobu HamamotoMasafumi YamamotoKeisuke UedaHisaya Takikita
    • H05B37/02
    • H05B33/0815H05B33/0893Y02B20/346
    • An LED lighting device includes a DC/DC power converter having output terminals coupled to respective lamp sockets. A controller receives signals from a current sensor and a voltage sensor, and controls the DC/DC power converter to increase/decrease an output voltage based on a sensed output current with respect to a target value. A sensed output voltage is compared to predetermined upper and lower limit values, and the DC/DC power converter is disabled when the output voltage exceeds the predetermined upper limit value or falls below the predetermined lower limit. The controller further measures an accumulated lighting time of the device, and after the accumulated lighting time has exceeded a predetermined switching time, decreases the upper limit value monotonously or in increments as the accumulated lighting time passes.
    • LED照明装置包括具有耦合到相应灯插座的输出端的DC / DC功率转换器。 控制器从电流传感器和电压传感器接收信号,并且基于相对于目标值的感测输出电流来控制DC / DC功率转换器来增加/减小输出电压。 将感测的输出电压与预定的上限和下限值进行比较,并且当输出电压超过预定上限值或低于预定下限时,DC / DC功率转换器被禁用。 控制器进一步测量装置的累积点亮时间,并且在累积点亮时间超过预定切换时间之后,随着累积点亮时间的过去,单调或逐渐减小上限值。
    • 67. 发明申请
    • LED LIGHTING DEVICE AND ILLUMINATION APPARATUS INCLUDING SAME
    • LED照明装置和照明装置,包括它们
    • US20120153832A1
    • 2012-06-21
    • US13326379
    • 2011-12-15
    • Katunobu HamamotoMasafumi YamamotoKeisuke UedaHisaya Takikita
    • Katunobu HamamotoMasafumi YamamotoKeisuke UedaHisaya Takikita
    • H05B37/02
    • H05B33/0815H05B33/089
    • An LED lighting device includes a step-up chopper which includes a first switching element and increases an output voltage applied from a DC power supply, a step-down chopper which includes a second switching element and decreases the output voltage from the step-up chopper to apply the decreased output voltage to a light source unit having light emitting diodes, a controller which controls operations of the first and the second switching element, a current limiter which includes a current limiting element and a switch; and a voltage detection unit. The controller stops an operation of the first switching element when the voltage detection unit detects the voltage applied to the light source unit exceeding a predetermined voltage value, and the switch allows a current to flow through the path passing through the current limiting element when the operation of the first switching element is stopped.
    • LED照明装置包括升压斩波器,其包括第一开关元件并增加从直流电源施加的输出电压,降压斩波器,其包括第二开关元件并且降低来自升压斩波器的输出电压 将降低的输出电压施加到具有发光二极管的光源单元,控制第一和第二开关元件的操作的控制器,包括限流元件和开关的限流器; 和电压检测单元。 当电压检测单元检测到施加到光源单元的电压超过预定电压值时,控制器停止第一开关元件的操作,并且当操作时,开关允许电流流过通过限流元件的路径 的第一开关元件被停止。
    • 68. 发明授权
    • Lamp end of life protection circuit and method for an electronic dimming ballast
    • 灯寿命终止保护电路和电子调光镇流器的方法
    • US08193727B2
    • 2012-06-05
    • US12492013
    • 2009-06-25
    • Tetsuya HamanaHiroyuki AsanoMasafumi Yamamoto
    • Tetsuya HamanaHiroyuki AsanoMasafumi Yamamoto
    • H05B41/36
    • H05B41/2985H05B41/3925
    • A electronic ballast includes an inverter circuit for converting a DC voltage into a high-frequency voltage, a resonant circuit connected between outputs of the inverter circuit so as to light a discharge lamp by a resonant action, a control circuit for controlling the inverter circuit, a dimming circuit for continuously changing an output voltage to the discharge lamp by changing an operation frequency in the inverter circuit, a DC component detection circuit and a voltage comparator for detecting whether or not the discharge lamp is at the end of the life at predetermined intervals and outputting an end of life detection signal upon detection of the end of the life state, and a frequency control circuit and a driving circuit for reducing or stopping an output to the discharge lamp by controlling switching elements in response to a life end detection signal inputted from the voltage comparator.
    • 电子镇流器包括用于将DC电压转换成高频电压的逆变器电路,连接在逆变器电路的输出端之间的谐振电路,以便通过谐振动作点亮放电灯,控制逆变器电路的控制电路, 用于通过改变逆变器电路中的操作频率来连续改变放电灯的输出电压的调光电路,直流分量检测电路和电压比较器,用于检测放电灯是否处于预定间隔的寿命结束 并且在检测到寿命状态的结束时输出寿命终止检测信号;以及频率控制电路和驱动电路,用于通过输入的寿命检测信号控制开关元件来减少或停止对放电灯的输出 从电压比较器。
    • 70. 发明申请
    • Lamp End of Life Protection Circuit and Method for an Electronic Dimming Ballast
    • 灯寿命终止保护电路和电子调光镇流器的方法
    • US20100001650A1
    • 2010-01-07
    • US12492013
    • 2009-06-25
    • Tetsuya HamanaHiroyuki AsanoMasafumi Yamamoto
    • Tetsuya HamanaHiroyuki AsanoMasafumi Yamamoto
    • H05B41/00
    • H05B41/2985H05B41/3925
    • A electronic ballast includes an inverter circuit for converting a DC voltage into a high-frequency voltage, a resonant circuit connected between outputs of the inverter circuit so as to light a discharge lamp by a resonant action, a control circuit for controlling the inverter circuit, a dimming circuit for continuously changing an output voltage to the discharge lamp by changing an operation frequency in the inverter circuit, a DC component detection circuit and a voltage comparator for detecting whether or not the discharge lamp is at the end of the life at predetermined intervals and outputting an end of life detection signal upon detection of the end of the life state, and a frequency control circuit and a driving circuit for reducing or stopping an output to the discharge lamp by controlling switching elements in response to a life end detection signal inputted from the voltage comparator.
    • 电子镇流器包括用于将DC电压转换成高频电压的逆变器电路,连接在逆变器电路的输出端之间的谐振电路,以便通过谐振动作点亮放电灯,控制逆变器电路的控制电路, 用于通过改变逆变器电路中的操作频率来连续改变放电灯的输出电压的调光电路,直流分量检测电路和电压比较器,用于检测放电灯是否处于预定间隔的寿命结束 并且在检测到寿命状态的结束时输出寿命终止检测信号;以及频率控制电路和驱动电路,用于通过输入的寿命检测信号控制开关元件来减少或停止对放电灯的输出 从电压比较器。