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    • 4. 发明申请
    • Polarity-reversible dimming controller having function of switching light source
    • 具有切换光源功能的极性可逆调光控制器
    • US20120019158A1
    • 2012-01-26
    • US12804493
    • 2010-07-22
    • Chung-Shu LeeShih-Chang LeeChih-Kuan LinChao-Ching Hsu
    • Chung-Shu LeeShih-Chang LeeChih-Kuan LinChao-Ching Hsu
    • H05B37/02
    • H05B33/0884H05B33/0851
    • A polarity-reversible dimming controller having function of switching light source has a power supply module and a dimming control module. The dimming control module receives an external PWM dimming signal to control a feedback signal of the power supply module so as to dim or power on/off an LED lamp. The dimming control module has an output current switching circuit, a switch control circuit and a dimming control circuit. The output current switching circuit performs a PWM control over a current outputted from the power supply module by using the external PWM dimming signal to maintain chromacity of the LED lamp as a constant. The switch control circuit turns off the PWM controller to enter a standby mode for saving power once the PWM dimming signal exceeds a threshold value. As a full-wave rectification is performed on the PWM dimming signal, the polarity match issue upon assembling can be disregarded.
    • 具有切换光源功能的极性可逆调光控制器具有电源模块和调光控制模块。 调光控制模块接收外部PWM调光信号,以控制电源模块的反馈信号,以使LED灯变暗或加电。 调光控制模块具有输出电流切换电路,开关控制电路和调光控制电路。 输出电流切换电路通过使用外部PWM调光信号对从电源模块输出的电流进行PWM控制,以将LED灯的色度维持为常数。 一旦PWM调光信号超过阈值,开关控制电路关闭PWM控制器进入待机模式,以节省电力。 由于对PWM调光信号进行全波整流,因此可以忽略组装时的极性匹配问题。
    • 7. 发明申请
    • CURRENT-SHARING POWER SUPPLY APPARATUS
    • 电流共享电源设备
    • US20110058392A1
    • 2011-03-10
    • US12554856
    • 2009-09-04
    • Shih-Chang LeeChung-Shu Lee
    • Shih-Chang LeeChung-Shu Lee
    • H02M3/335
    • H02M3/33569Y02B70/1433
    • A current-sharing power supply apparatus includes a conversion circuit, a square-wave generating circuit, a resonant circuit, a rectifier circuit, and a filter circuit. The conversion circuit has two transformers, and each of the transformers has a primary winding and at least one secondary winding. More particularly, two secondary windings of the two transformers are electrically connected in series. The square-wave generating circuit is electrically connected to a DC voltage to switch the DC voltage into a pulsating voltage. The resonant circuit is electrically connected to the square-wave generating circuit, and having a first capacitor and the primary windings of the transformers. The rectifier circuit has at least two switch components, and electrically connected to the secondary windings of the transformers to rectify an AC output voltage into a rectified voltage, and the rectified voltage is outputted to at least one voltage output terminal.
    • 分流电源装置包括转换电路,方波发生电路,谐振电路,整流电路和滤波电路。 转换电路具有两个变压器,并且每个变压器具有初级绕组和至少一个次级绕组。 更具体地,两个变压器的两个次级绕组串联电连接。 方波发生电路与直流电压电连接,将直流电压切换成脉动电压。 谐振电路电连接到方波发生电路,并且具有第一电容器和变压器的初级绕组。 整流电路具有至少两个开关部件,与变压器的次级绕组电连接,将交流输出电压整流为整流电压,整流电压输出至少一个电压输出端子。
    • 8. 发明申请
    • TWO-STAGE BALANCER FOR MULTI-LAMP BACKLIGHT
    • 用于多灯背光的两阶段平衡灯
    • US20100289414A1
    • 2010-11-18
    • US12465225
    • 2009-05-13
    • Shih-Chang LEEYu-Min HuangChung-Shu Lee
    • Shih-Chang LEEYu-Min HuangChung-Shu Lee
    • H05B37/00
    • H05B41/2827
    • A two-stage balancer for a multi-lamp backlight is electrically connected to a driving unit through a driving transformer. The two-stage balancer includes a plurality of first balancing transformers, second balancing transformers, and lighting units. Each of the first balancing transformers is electrically connected to the corresponding second balancing transformers to form a two-stage structure. In addition, a primary winding and a secondary winding of the second balancing transformer is electrically connected in series to one lighting unit, respectively, to form a circuit loop. Further, each of the circuit loops is electrically connected in parallel. Whereby the two-stage balancer provides much better current balance between the parallel circuit loops, and outputs a sinusoid-like driving current to increase lighting efficacy and further maintain uniform brightness of the multi-lamp backlight.
    • 用于多灯背光的两级平衡器通过驱动变压器电连接到驱动单元。 两级平衡器包括多个第一平衡变压器,第二平衡变压器和照明单元。 每个第一平衡变压器电连接到相应的第二平衡变压器以形成两级结构。 此外,第二平衡变压器的初级绕组和次级绕组分别电连接到一个照明单元以形成电路回路。 此外,每个电路回路并联电连接。 由此两级平衡器在并联电路环路之间提供更好的电流平衡,并且输出正弦曲线驱动电流以增加照明效率并进一步保持多灯背光的均匀亮度。