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公开(公告)号：US08729870B2
公开(公告)日：2014-05-20
申请号：US13531584
申请日：2012-06-25
IPC分类号： G05F1/70
CPC分类号： H05B33/0815
摘要： A current-driven load such as LEDs or laser diodes is driven by a current driver having a two stages (or phases), the outputs of which have ripple which is forced to be out-of-phase with one another. In analog embodiments, an output (ripple or switching) of a master stage hysteresis controller is phase-shifted and scaled, and modulates the input of a slave stage hysteresis controller so that the slave stage pulls into a ripple-canceling phase. In digital embodiments, a faster of the two phases is designated “master”, maximum and minimum thresholds are set, and the slave phase's on time is based on a previous cycle's slave phase ON time, the master stage OFF time and an offset. The slave controller may “lock” to the anti-phase of the master stage (or phase). The ripple currents at the summed output of the master and slave stages substantially cancel.
摘要翻译： 诸如LED或激光二极管的电流驱动负载由具有两级（或相）的电流驱动器驱动，其输出具有被迫彼此异相的纹波。 在模拟实施例中，主级滞后控制器的输出（纹波或切换）被相移和缩放，并且调制从属级滞后控制器的输入，使得从级将拉入纹波消除阶段。 在数字实施例中，两相中较快的速度被指定为“主”，设定最大和最小阈值，并且从动相的导通时间基于先前的周期的从相接通时间，主阶段关断时间和偏移量。 从控制器可以“锁定”到主级（或相）的反相。 主级和从级相加输出的纹波电流基本上消除。
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公开(公告)号：US20100207543A1
公开(公告)日：2010-08-19
申请号：US12541915
申请日：2009-08-15
IPC分类号： H05B37/02
CPC分类号： H05B33/0815
摘要： A current-driven load such as LEDs or laser diodes is driven by a current driver having a two stages (or phases), the summed outputs of which have ripple which is forced to be out-of-phase with one another. In analog embodiments, an output (ripple or switching) of a master stage hysteresis controller is phase-shifted and scaled, and modulates the input of a slave stage hysteresis controller so that the slave stage pulls into a ripple-canceling phase. In a digital embodiment, a faster of the two phases is designated “master”, maximum and minimum thresholds are set, and the slave phase's on time is based on a previous cycle's slave phase ON time, the master stage OFF time and an offset. The slave controller preferentially “locks” to the anti-phase of the master stage (or phase) and the ripple current at the summed output substantially cancels.
摘要翻译： 诸如LED或激光二极管的电流驱动负载由具有两级（或相位）的电流驱动器驱动，其相加的输出具有被迫彼此异相的纹波。 在模拟实施例中，主级滞后控制器的输出（纹波或切换）被相移和缩放，并且调制从属级滞后控制器的输入，使得从级将拉入纹波消除阶段。 在数字实施例中，两相中较快的速度被指定为“主”，设定最大和最小阈值，并且从动相的导通时间基于先前的周期的从相接通时间，主阶段关断时间和偏移量。 从控制器优先“锁定”到主级（或相位）的反相位，并且相加输出处的纹波电流基本上消除。
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公开(公告)号：US20120268026A1
公开(公告)日：2012-10-25
申请号：US13531584
申请日：2012-06-25
CPC分类号： H05B33/0815
摘要： A current-driven load such as LEDs or laser diodes is driven by a current driver having a two stages (or phases), the outputs of which have ripple which is forced to be out-of-phase with one another. In analog embodiments, an output (ripple or switching) of a master stage hysteresis controller is phase-shifted and scaled, and modulates the input of a slave stage hysteresis controller so that the slave stage pulls into a ripple-canceling phase. In digital embodiments, a faster of the two phases is designated “master”, maximum and minimum thresholds are set, and the slave phase's on time is based on a previous cycle's slave phase ON time, the master stage OFF time and an offset. The slave controller may “lock” to the anti-phase of the master stage (or phase). The ripple currents at the summed output of the master and slave stages substantially cancel.
摘要翻译： 诸如LED或激光二极管的电流驱动负载由具有两级（或相）的电流驱动器驱动，其输出具有被迫彼此异相的纹波。 在模拟实施例中，主级滞后控制器的输出（纹波或切换）被相移和缩放，并且调制从属级滞后控制器的输入，使得从级将拉入纹波消除阶段。 在数字实施例中，两相中较快的速度被指定为主，最大和最小阈值被设置，并且从动相的导通时间基于先前的周期的从相接通时间，主阶段关断时间和偏移量。 从控制器可能锁定到主级（或相）的反相。 主级和从级相加输出的纹波电流基本上消除。
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公开(公告)号：US08207711B2
公开(公告)日：2012-06-26
申请号：US12541915
申请日：2009-08-15
IPC分类号： G05F1/70
CPC分类号： H05B33/0815
摘要： A current-driven load such as LEDs or laser diodes is driven by a current driver having a two stages (or phases), the summed outputs of which have ripple which is forced to be out-of-phase with one another. In analog embodiments, an output (ripple or switching) of a master stage hysteresis controller is phase-shifted and scaled, and modulates the input of a slave stage hysteresis controller so that the slave stage pulls into a ripple-canceling phase. In a digital embodiment, a faster of the two phases is designated “master”, maximum and minimum thresholds are set, and the slave phase's on time is based on a previous cycle's slave phase ON time, the master stage OFF time and an offset. The slave controller preferentially “locks” to the anti-phase of the master stage (or phase) and the ripple current at the summed output substantially cancels.
摘要翻译： 诸如LED或激光二极管的电流驱动负载由具有两级（或相）的电流驱动器驱动，其相加的输出具有被迫彼此异相的纹波。 在模拟实施例中，主级滞后控制器的输出（纹波或切换）被相移和缩放，并且调制从属级滞后控制器的输入，使得从级将拉入纹波消除阶段。 在数字实施例中，两相中较快的速度被指定为“主”，设定最大和最小阈值，并且从动相的导通时间基于先前的周期的从相接通时间，主阶段关断时间和偏移量。 从控制器优先“锁定”到主级（或相位）的反相位，并且相加输出处的纹波电流基本上消除。
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公开(公告)号：US08184670B2
公开(公告)日：2012-05-22
申请号：US12900453
申请日：2010-10-07
CPC分类号： H05B33/0824 , H01S5/0428 , H05B33/0818 , H05B33/0851 , H05B33/0854 , Y02B20/347
摘要： In a pulsed laser diode driver an energy storage capacitor is continuously being charged to a supply voltage Vr. When a pulse is initiated, energy stored in the capacitor is delivered to the laser diode load. The capacitor voltage Vd at the end of a pulse is used to control Vr to ensure that Vd is maintained above a minimum voltage Vm required to ensure operation of a current control device (such as FET) just above saturation. Test pulses (such as with attenuated currents or reduced pulsewidth) may be fired to determine an initial optimum value for Vr. After a test pulse, a slightly high estimate for Vr may be used and may be iterated (incremented) down to an optimum value Vm during a firing burst. A digital processor may be used to calculate and store data to optimize the performance. Various embodiments are disclosed.
摘要翻译： 在脉冲激光二极管驱动器中，储能电容器被连续地充电到电源电压Vr。 当启动脉冲时，存储在电容器中的能量被传送到激光二极管负载。 脉冲结束时的电容器电压Vd用于控制Vr，以确保Vd保持在高于饱和度的电流控制装置（例如FET）的操作所需的最小电压Vm以上。 可以激发测试脉冲（例如具有衰减电流或减小的脉冲宽度）以确定Vr的初始最佳值。 在测试脉冲之后，可以使用略微高的Vr估计，并且可以在发射突发期间迭代（递增）到最佳值Vm。 数字处理器可用于计算和存储数据以优化性能。 公开了各种实施例。
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公开(公告)号：US20110085576A1
公开(公告)日：2011-04-14
申请号：US12900453
申请日：2010-10-07
CPC分类号： H05B33/0824 , H01S5/0428 , H05B33/0818 , H05B33/0851 , H05B33/0854 , Y02B20/347
摘要： In a pulsed laser diode driver an energy storage capacitor is continuously being charged to a supply voltage Vr. When a pulse is initiated, energy stored in the capacitor is delivered to the laser diode load. The capacitor voltage Vd at the end of a pulse is used to control Vr to ensure that Vd is maintained above a minimum voltage Vm required to ensure operation of a current control device (such as FET) just above saturation. Test pulses (such as with attenuated currents or reduced pulsewidth) may be fired to determine an initial optimum value for Vr. After a test pulse, a slightly high estimate for Vr may be used and may be iterated (incremented) down to an optimum value Vm during a firing burst. A digital processor may be used to calculate and store data to optimize the performance. Various embodiments are disclosed.
摘要翻译： 在脉冲激光二极管驱动器中，储能电容器被连续地充电到电源电压Vr。 当启动脉冲时，存储在电容器中的能量被传送到激光二极管负载。 脉冲结束时的电容器电压Vd用于控制Vr，以确保Vd保持在高于饱和度的电流控制装置（例如FET）的操作所需的最小电压Vm以上。 可以激发测试脉冲（例如具有衰减电流或减小的脉冲宽度）以确定Vr的初始最佳值。 在测试脉冲之后，可以使用略微高的Vr估计，并且可以在发射突发期间迭代（递增）到最佳值Vm。 数字处理器可用于计算和存储数据以优化性能。 公开了各种实施例。
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公开(公告)号：US5202892A
公开(公告)日：1993-04-13
申请号：US792318
申请日：1991-11-08
申请人： John A. Harwick
发明人： John A. Harwick
IPC分类号： H05B41/30
CPC分类号： H05B41/30
摘要： A pulse forming and delivery system 10 is disclosed for forming and deliverying a pulse of electrical energy to a flashlamp 38. System 10 includes a capacitor 14 which is adapted to selectively store electrical energy from a power supply 16 and to transfer this electrical energy to flashlamp 38 when the gate portion of thyristor 12 is open. This gate portion is opened by controller 28. The total amount of light energy emanating from the laser and/or provided to flashlamp 38 is monitored by detector 42 and communicated to controller 22 by means of bus 44. When this total amount has exceeded a desired energy level, controller 22 prevents further electrical energy to be impressed upon switch controller 28 thereby, closing the gate portion of thyristor 12 and preventing any further transfer of energy to flashlamp 38.
摘要翻译： 公开了脉冲形成和传送系统10，用于将电能的脉冲形成和传送到闪光灯38.系统10包括电容器14，其适于选择性地存储来自电源16的电能并将该电能传送到闪光灯 当晶闸管12的栅极部分断开时， 该门部分由控制器28打开。从激光器和/或提供给闪光灯38发出的光能的总量由检测器42监测，并通过总线44传送到控制器22.当该总量超过期望值 能量水平，控制器22防止进一步的电能施加在开关控制器28上，从而关闭晶闸管12的栅极部分并防止能量进一步转移到闪光灯38。
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