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1. 发明授权

US08541956B2 Light emitting diode driving method and driving circuit 有权
标题翻译：发光二极管驱动方式及驱动电路
公开(公告)号：US08541956B2
公开(公告)日：2013-09-24
申请号：US13042946
申请日：2011-03-08
申请人： Hung-Ching Lee , Ching-Chou Yu , Sheng-Kai Hsu , Dang-Ko Wang
发明人： Hung-Ching Lee , Ching-Chou Yu , Sheng-Kai Hsu , Dang-Ko Wang
IPC分类号： H05B37/02
CPC分类号： H05B33/0851
摘要： A LED driving method includes steps of: providing a first pulse width modulation (PWM) signal for determining a brightness of a LED; obtaining a duty cycle of the first PWM signal; and selectively enabling the LED to work with a PWM dimming mode or a direct current (DC) dimming mode according to a relative relationship between a magnitude of the obtained duty cycle and a preset threshold value. Since the LED is performed with a two stage brightness control by use of mixed dimming mode, the driving efficiency of the LED can be improved.
摘要翻译： LED驱动方法包括以下步骤：提供用于确定LED的亮度的第一脉冲宽度调制（PWM）信号; 获得第一PWM信号的占空比; 以及根据所获得的占空比的幅度与预设的阈值之间的相对关系，选择性地使得LED能够以PWM调光模式或直流（DC）调光模式工作。由于通过使用混合调光模式通过两级亮度控制来执行LED，因此可以提高LED的驱动效率。

2. 发明申请

US20120019160A1 LIGHT EMITTING DIODE DRIVING METHOD AND DRIVING CIRCUIT 有权
标题翻译：发光二极管驱动方法和驱动电路
公开(公告)号：US20120019160A1
公开(公告)日：2012-01-26
申请号：US13042946
申请日：2011-03-08
申请人： Hung-Ching LEE , Ching-Chou Yu , Sheng-Kai Hsu , Dang-Ko Wang
发明人： Hung-Ching LEE , Ching-Chou Yu , Sheng-Kai Hsu , Dang-Ko Wang
IPC分类号： H05B37/02
CPC分类号： H05B33/0851
摘要： A LED driving method includes steps of: providing a first pulse width modulation (PWM) signal for determining a brightness of a LED; obtaining a duty cycle of the first PWM signal; and selectively enabling the LED to work with a PWM dimming mode or a direct current (DC) dimming mode according to a relative relationship between a magnitude of the obtained duty cycle and a preset threshold value. Since the LED is performed with a two stage brightness control by use of mixed dimming mode, the driving efficiency of the LED can be improved.
摘要翻译： LED驱动方法包括以下步骤：提供用于确定LED的亮度的第一脉宽调制（PWM）信号; 获得第一PWM信号的占空比; 以及根据所获得的占空比的幅度与预设的阈值之间的相对关系，选择性地使得LED能够以PWM调光模式或直流（DC）调光模式工作。由于通过使用混合调光模式通过两级亮度控制来执行LED，因此可以提高LED的驱动效率。

3. 发明申请

US20120049750A1 LIGHT EMITTING DIODE DRIVING METHOD 有权
标题翻译：发光二极管驱动方法
公开(公告)号：US20120049750A1
公开(公告)日：2012-03-01
申请号：US13110154
申请日：2011-05-18
申请人： Dang-Ko Wang , Hung-Ching Lee , Ching-Chou Yu
发明人： Dang-Ko Wang , Hung-Ching Lee , Ching-Chou Yu
IPC分类号： H05B37/02
CPC分类号： H05B33/0827
摘要： An exemplary LED driving method is adapted for driving multiple LED strings. Each of the LED strings includes single one LED or multiple LEDs connected in series. In particular, the LED driving method includes steps of: obtaining an initial value of a duty-on period of a driving current in a frequency period to thereby acquire a target accumulative luminosity in the initial value of the duty-on period for each of the LED strings; and prolonging the duty-on period of the driving current in the frequency period and assuring an accumulative luminosity in the prolonged duty-on period to be substantially equal to the target accumulative luminosity for each of the LED strings, when the maximum one of the initial values of the duty-on periods of the driving currents in the frequency period for the LED strings is shorter than the frequency period.
摘要翻译： LED驱动方法适用于驱动多个LED串。每个LED串包括串联连接的单个LED或多个LED。特别地，LED驱动方法包括以下步骤：获得频率周期中的驱动电流的占空比周期的初始值，从而获得每个的每个的占空比期间的初始值的目标累积亮度 LED灯串; 并且在频率周期中延长驱动电流的占空比时间，并且在延长的占空比时间段中确保每个LED串的目标累积亮度基本上等于目标累积亮度的累积亮度，当最初的 LED串的频率周期中的驱动电流的占空比周期的值比频率周期短。

4. 发明授权

US08604720B2 Light emitting diode driving method 有权
标题翻译：发光二极管驱动方式
公开(公告)号：US08604720B2
公开(公告)日：2013-12-10
申请号：US13110154
申请日：2011-05-18
申请人： Dang-Ko Wang , Hung-Ching Lee , Ching-Chou Yu
发明人： Dang-Ko Wang , Hung-Ching Lee , Ching-Chou Yu
IPC分类号： H05B37/02
CPC分类号： H05B33/0827
摘要： An exemplary LED driving method is adapted for driving multiple LED strings. Each of the LED strings includes single one LED or multiple LEDs connected in series. In particular, the LED driving method includes steps of: obtaining an initial value of a duty-on period of a driving current in a frequency period to thereby acquire a target accumulative luminosity in the initial value of the duty-on period for each of the LED strings; and prolonging the duty-on period of the driving current in the frequency period and assuring an accumulative luminosity in the prolonged duty-on period to be substantially equal to the target accumulative luminosity for each of the LED strings, when the maximum one of the initial values of the duty-on periods of the driving currents in the frequency period for the LED strings is shorter than the frequency period.
摘要翻译： LED驱动方法适用于驱动多个LED串。每个LED串包括串联连接的单个LED或多个LED。特别地，LED驱动方法包括以下步骤：获得频率周期中的驱动电流的占空比周期的初始值，从而获得每个的每个的占空比期间的初始值的目标累积亮度 LED灯串; 并且在频率周期中延长驱动电流的占空比时间，并且在延长的占空比时间段中确保每个LED串的目标累积亮度基本上等于目标累积亮度的累积亮度，当最初的 LED串的频率周期中的驱动电流的占空比周期的值比频率周期短。

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