发明名称 Method for Controlling Light-Emitting Diodes
摘要 The brightness generated by LEDs in an LED strip is adjusted by pulse-width modulation, wherein the LEDs connected in series are driven temporally offset to one another. If there is a shift in the on-time of at least one LED, a controller inserts at least one additional drive pulse to switch on the LEDs if the interval of the on-times of an LED in the time frame before the shift and in the drive frame after the shift is so large that the interval arising therefrom exceeds a first threshold. Alternatively, the controller reduces at least one drive pulse for switching on the LEDs to curtail the on-time of the LEDs if the interval of the on-times of an LED in the time frame before the shift and in the time frame after the shift is so small that the interval arising therefrom drops below a second threshold.
申请公布号 US2015216010(A1) 申请公布日期 2015.07.30
申请号 US201514598391 申请日期 2015.01.16
申请人 Lear Corporation 发明人 Reier Michael
分类号 H05B33/08 主分类号 H05B33/08
代理机构 代理人
主权项 1. A method for controlling at least one LED strip including a multiplicity of LEDs connected in series, wherein each of the LEDs is separately connected by a switching element and a controller connects the switching elements for connecting the LEDs by outputting drive pulses, wherein the brightness generated by the LEDs is adjusted by means of pulse-width modulation by changing the ON period of an LED within a drive frame, and the LEDs connected in series are driven temporally offset to one another, the method comprising the steps of: in the event of a shift in the on-time of at least one LED, the controller inserts at least one additional drive pulse to switch on the LEDs if the interval of the on-times of an LED in the time frame before the shift and in the drive frame after the shift is so large that the interval arising therefrom exceeds a first threshold, and/or the controller reduces at least one drive pulse for switching on the LEDs to curtail the on-time of the LEDs if the interval of the on-times of an LED in the time frame before the shift and in the time frame after the shift is so small that the interval arising therefrom drops below a second threshold.
地址 Southfield MI US