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发明授权
CN107432065B LED驱动器电路、照明装置和驱动方法 有权

LED驱动器电路、照明装置和驱动方法
摘要：
一种第一LED驱动器电路，包括：用于接收AC功率输入并提供第一输出的第一输入接口(30)，其中所述第一输出适于连接到第二LED驱动器电路；由所述第一输出供电的第一LED驱动器(32)；用于使所述第一输出短路的第一短路元件(36)；用于控制所述第一短路元件的第一控制装置(38)，其中所述第一控制装置(36)适于在所述第二LED驱动器电路相对于未被供电的所述第一LED驱动器(32)互补地由所述AC功率输入供电时，在所述AC功率输入的半周期的仅一个子集期间闭合所述第一短路元件(36)，以使所述第一LED驱动器(32)短路，并且防止所述第一LED驱动器(32)由所述AC功率输入供电，并且所述第一控制装置(36)适于在所述第二LED驱动器电路相对于第一LED驱动器(32)互补地不由所述AC功率输入供电时，在所述半周期的另一个子集期间断开所述第一短路元件(36)，以允许所述AC功率输入为所述第一LED驱动器(32)供电；其中所述半周期是所述AC功率输入的正幅度持续时间或负幅度持续时间。这意味着可以串联使用两个LED驱动器电路，其中每个LED驱动器电路基于AC功率输入的半周期的仅仅一个子集被供电或互补地不被供电。
摘要（英）：

A first LED driver circuit comprising: a first input interface (30) for receiving an AC power input and providing a first output, wherein said first output is adapted to be connected to a second LED driver circuit; a first LED driver (32) powered by the first output; a first shorting element (36) for shorting the first output; a first control arrangement (38) for controlling the first shorting element wherein the first control arrangement (38) is adapted to close the first shorting element (36) during only one subset of half cycles of the AC power input to short circuit the first LED driver (32) and to prevent the first LED driver (32) from being powered by the AC power input, when the second LED driver circuit is powered by the AC power input complementarily with respect to the unpowered first LED driver (32) and, open the first shorting element (36) during the other subset of half cycles to allow the AC power input to power the first LED driver (32), when the second LED driver circuit is not powered by the AC power input complementarily with respect to the first LED driver (32); wherein the half cycle is the positive amplitude duration or the negative amplitude duration of the AC power input This means two of the LED driver circuits may be used in series, each one is supplies by power or not complementarily based on only one subset of half cycles of the AC power input.

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