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    • 2. 发明申请
    • LIGHT-EMITTING DIODE LIGHTING DEVICE
    • 发光二极管照明设备
    • US20100097007A1
    • 2010-04-22
    • US12579784
    • 2009-10-15
    • Masahiko KamataHajime OsakiHirokazu OtakeShinya HakutaTakuro HiramatsuToshiyuki HiraokaNaoko Iwai
    • Masahiko KamataHajime OsakiHirokazu OtakeShinya HakutaTakuro HiramatsuToshiyuki HiraokaNaoko Iwai
    • H05B41/36
    • H05B33/089H05B33/0887
    • There is provided an LED lighting device having a satisfactory temperature characteristic and a small amount of variation in output current. The step-down chopper is provided with a first circuit including the switching element, the impedance means and a first inductor connected in series and a second circuit including the first inductor and a diode connected in series. A self-excited drive signal generation circuit is provided with a second inductor magnetically coupled with the first inductor and applies a voltage induced in the second inductor to the switching element to keep the switching element on. A turn-off circuit outputs an output voltage when the voltage of the impedance means detected by a comparator exceeds the reference value, and the output voltage allows a switching element to turn on to short-circuit the output terminals of the self-excited drive signal generation circuit, resulting in that the switching element is turned off.
    • 提供了具有令人满意的温度特性和少量的输出电流变化的LED照明装置。 降压斩波器设置有包括开关元件,阻抗装置和串联连接的第一电感器的第一电路和包括串联连接的第一电感器和二极管的第二电路。 自激驱动信号产生电路具有与第一电感器磁耦合的第二电感器,并将在第二电感器中感应的电压施加到开关元件以保持开关元件导通。 当由比较器检测到的阻抗装置的电压超过参考值时,关断电路输出输出电压,并且输出电压允许开关元件导通以使自激驱动信号的输出端短路 导致开关元件断开。
    • 10. 发明授权
    • Power supply device and lighting equipment
    • 电源设备和照明设备
    • US08354804B2
    • 2013-01-15
    • US12873744
    • 2010-09-01
    • Hirokazu OtakeMitsuhiko NishiieTakuro HiramatsuKeiichi Shimizu
    • Hirokazu OtakeMitsuhiko NishiieTakuro HiramatsuKeiichi Shimizu
    • H05B37/02
    • H05B37/02H02M3/33507H02M2001/0025H05B33/0803H05B33/0815H05B33/0848Y02B20/347
    • In a power supply device according to one embodiment, a reference signal (Vref1), which changes from a value corresponding to a maximum current in a full lighting state to that corresponding to a minimum current in case of a deepest dimming depth, and a reference signal (Vref2), which changes from a value corresponding to a load voltage at the time of a maximum current in a full lighting state to that corresponding to a minimum current in case of the deepest dimming depth, are prepared in accordance with dimming depths of a dimming signal. In a shallow dimming depth region close to a full lighting state, the reference signal (Vref1) is selected to apply constant-current control to light-emitting diodes in a current control mode. In a deep dimming depth region, the reference signal (Vref2) is selected to apply constant-voltage control to the diodes in a voltage control mode.
    • 在根据一个实施例的电源装置中,在最深调光深度的情况下,从与完全点亮状态中的最大电流相对应的值与对应于最小电流的值相对应的参考信号(Vref1)和参考信号 根据调光深度,准备从完全点亮状态时的最大电流时的负载电压值与最深度调光深度情况下的最小电流对应的值变化的信号(Vref2) 一个调光信号。 在接近完全点亮状态的浅调光深度区域中,选择参考信号(Vref1),以电流控制模式对发光二极管施加恒流控制。 在深度较深的深度区域中,选择参考信号(Vref2)以在电压控制模式中对二极管施加恒定电压控制。