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公开(公告)号：US20120038285A1
公开(公告)日：2012-02-16
申请号：US12955030
申请日：2010-11-29
申请人： Wa Hing Leung , Johnny Siu
发明人： Wa Hing Leung , Johnny Siu
IPC分类号： H05B37/02
CPC分类号： H05B33/0809 , H05B33/083
摘要： An LED array switching apparatus, comprises: a plurality of LED segments D1 to Dn connected in series, each LED segment having a forward voltage; a voltage supply coupled to the plurality of LED segments; and a plurality of constant current sources G1 to Gn, coupled to outputs of LED segments D1 to Dn, respectively. Each of the constant current sources is switchable between a current regulating state and an open state such that as the voltage of the voltage supply increases, LED segments are switched on and lit to form a higher forward voltage LED string, and as the voltage of the voltage supply decreases, segments are switched off and removed from the LED string starting with the most recently lit segment.
摘要翻译： 一种LED阵列开关装置，包括：串联连接的多个LED段D1至Dn，每个LED段具有正向电压; 耦合到所述多个LED段的电压源; 以及分别耦合到LED段D1至Dn的输出的多个恒流源G1至Gn。 每个恒流源可以在电流调节状态和断开状态之间切换，使得当电压源的电压增加时，LED段被接通并点亮以形成更高的正向电压LED串，并且作为 电压降低，从最近点亮的段开始，将LED段切断并从LED串上拆下。
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公开(公告)号：US08947014B2
公开(公告)日：2015-02-03
申请号：US13035556
申请日：2011-02-25
申请人： Wa-Hing Leung , Johnny Siu
发明人： Wa-Hing Leung , Johnny Siu
CPC分类号： H05B33/083 , H05B33/0824 , H05B33/0845
摘要： An LED array switching apparatus, comprises: a plurality of LED arrays arranged in a serial path; a voltage supply coupled to the plurality of LED arrays; a plurality of current sources selectively coupled to the LED arrays, each of the current sources being switchable between a current regulating state and an open state; and a controller that outputs at least one control signal. The controller, the at least one switch and current sources cooperate together such that: when the voltage of the voltage source is below the at least one reference voltage, and/or when a predetermined level of current passes through the one or more current sources, at least one switch is closed and one or more associated current sources are controlled so as to break the serial path into one or more parallel paths each including less than all of the LED arrays.
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公开(公告)号：US08508140B2
公开(公告)日：2013-08-13
申请号：US12955030
申请日：2010-11-29
申请人： Wa-Hing Leung , Johnny Siu
发明人： Wa-Hing Leung , Johnny Siu
CPC分类号： H05B33/0809 , H05B33/083
摘要： An LED array switching apparatus, comprises: a plurality of LED segments D1 to Dn connected in series, each LED segment having a forward voltage; a voltage supply coupled to the plurality of LED segments; and a plurality of constant current sources G1 to Gn, coupled to outputs of LED segments D1 to Dn, respectively. Each of the constant current sources is switchable between a current regulating state and an open state such that as the voltage of the voltage supply increases, LED segments are switched on and lit to form a higher forward voltage LED string, and as the voltage of the voltage supply decreases, segments are switched off and removed from the LED string starting with the most recently lit segment.
摘要翻译： 一种LED阵列开关装置，包括：串联连接的多个LED段D1至Dn，每个LED段具有正向电压; 耦合到所述多个LED段的电压源; 以及分别耦合到LED段D1至Dn的输出的多个恒流源G1至Gn。 每个恒流源可以在电流调节状态和断开状态之间切换，使得当电压源的电压增加时，LED段被接通并点亮以形成更高的正向电压LED串，并且作为 电压降低，从最近点亮的段开始，将LED段切断并从LED串上拆下。
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