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    • 4. 发明申请
    • INSULATION TYPE AC-DC CONVERTER AND LED DC POWER SUPPLY DEVICE USING THE SAME
    • 绝缘型AC-DC转换器和使用其的LED直流电源装置
    • US20100109571A1
    • 2010-05-06
    • US12524640
    • 2008-01-30
    • Hiroyuki NishinoEiji Shiohama
    • Hiroyuki NishinoEiji Shiohama
    • H05B41/36H02M3/335
    • H05B33/0815H02M1/4208H02M3/337H02M2001/0058H02M2001/007Y02B20/348Y02B70/126Y02B70/1491
    • In an insulation type AC-dc converter in which input current from a commercial power supply is converted to obtain insulated direct current, the overall efficiency is raised and the structure is simplified. A multi-resonance type half-bridge DC-DC converter having an insulation transformer T is used as a first converter, and a boosting chopper circuit for power factor improvement is used as a second converter. Hence through multi-resonance operation, increases in losses can be suppressed even when the switching frequency is raised, and because a half-bridge circuit is used, switching elements and similar with lower voltage ratings can be employed, whereby overall efficiency can be increased. Moreover, a voltage substantially similar to the full-wave rectified waveform of the power supply voltage is obtained from the output capacitor at the boosting chopper circuit input, whereby there is no need for a feed-forward circuit across the insulation transformer, and moreover the electrolytic capacitor which had to be provided on the converter input side is unnecessary. This is advantageous for achieving miniaturization and a thin design.
    • 在将商用电源的输入电流转换为绝缘直流电的绝缘型AC-DC转换器中,总体效率提高,结构简化。 使用具有绝缘变压器T的多谐振型半桥DC-DC转换器作为第一转换器,并且将用于功率因数改善的升压斩波电路用作第二转换器。 因此,通过多谐振动作,即使在开关频率升高的情况下也能够抑制损失的增加,并且由于使用半桥电路,因此可以采用具有较低额定电压的开关元件等,从而可以提高整体效率。 此外,从升压斩波电路输入端的输出电容器获得与电源电压的全波整流波形大致相似的电压,由此不需要跨越绝缘变压器的前馈电路,此外, 必须在转换器输入侧设置的电解电容器是不必要的。 这对于实现小型化和薄设计是有利的。
    • 5. 发明授权
    • Insulation type AC-DC converter and LED DC power supply device using the same
    • 绝缘型AC-DC转换器和LED直流电源装置使用相同
    • US08125158B2
    • 2012-02-28
    • US12524640
    • 2008-01-30
    • Hiroyuki NishinoEiji Shiohama
    • Hiroyuki NishinoEiji Shiohama
    • H05B37/02H05B41/36
    • H05B33/0815H02M1/4208H02M3/337H02M2001/0058H02M2001/007Y02B20/348Y02B70/126Y02B70/1491
    • In an insulation type AC-dc converter in which input current from a commercial power supply is converted to obtain insulated direct current, the overall efficiency is raised and the structure is simplified. A multi-resonance type half-bridge DC-DC converter having an insulation transformer T is used as a first converter, and a boosting chopper circuit for power factor improvement is used as a second converter. Hence through multi-resonance operation, increases in losses can be suppressed even when the switching frequency is raised, and because a half-bridge circuit is used, switching elements and similar with lower voltage ratings can be employed, whereby overall efficiency can be increased. Moreover, a voltage substantially similar to the full-wave rectified waveform of the power supply voltage is obtained from the output capacitor at the boosting chopper circuit input, whereby there is no need for a feed-forward circuit across the insulation transformer, and moreover the electrolytic capacitor which had to be provided on the converter input side is unnecessary. This is advantageous for achieving miniaturization and a thin design.
    • 在将商用电源的输入电流转换为绝缘直流电的绝缘型AC-DC转换器中,总体效率提高,结构简化。 使用具有绝缘变压器T的多谐振型半桥DC-DC转换器作为第一转换器,并且将用于功率因数改善的升压斩波电路用作第二转换器。 因此,通过多谐振动作,即使在开关频率升高的情况下也能够抑制损失的增加,并且由于使用半桥电路,因此可以采用具有较低额定电压的开关元件等,从而可以提高整体效率。 此外,从升压斩波电路输入端的输出电容器获得与电源电压的全波整流波形大致相似的电压,由此不需要跨越绝缘变压器的前馈电路,此外, 必须在转换器输入侧设置的电解电容器是不必要的。 这对于实现小型化和薄设计是有利的。
    • 6. 发明申请
    • LED LIGHTING CIRCUIT AND ILLUMINATING APPARATUS USING THE SAME
    • LED照明电路和照明设备
    • US20100109537A1
    • 2010-05-06
    • US12447123
    • 2007-10-19
    • Hiroyuki NishinoEiji Shiohama
    • Hiroyuki NishinoEiji Shiohama
    • H05B39/00H05B37/02
    • H05B33/0827H05B33/0815H05B33/0821
    • Light outputs from many LEDs are uniformized and power consumption required for such uniformizing is suppressed, in an LED lighting circuit to be used for illuminating apparatus and the like. Currents flowing from a DD converter to an LED module are detected by a current detection resistor and compared with a reference voltage (Vref) from a reference voltage source by a comparison circuit. Corresponding to the comparison results, a control circuit controls the DD converter, and the currents flowing to the LED module are controlled to be constant currents at the same time. Furthermore, in LED load circuits configuring the LED module, control elements configuring a current mirror circuit are arranged in series, a corresponding control element is permitted to have a diode structure by having a circuit with the highest sum of the LED ON voltages as a reference, the flowing current values of the control elements of the remaining circuits are interlocked, and the LED load circuits are balanced.
    • 来自许多LED的光输出是均匀的,并且在用于照明装置等的LED照明电路中抑制了这种均匀化所需的功率消耗。 通过电流检测电阻检测从DD转换器流向LED模块的电流,并通过比较电路与参考电压源的参考电压(Vref)进行比较。 对应于比较结果,控制电路控制DD转换器,并且流向LED模块的电流被同时控制为恒定电流。 此外,在构成LED模块的LED负载电路中,构成电流镜电路的控制元件串联布置,通过使具有最高的LED导通电压之和的电路作为参考,允许相应的控制元件具有二极管结构 剩余电路的控制元件的流动电流值互锁,LED负载电路平衡。