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11. 发明公开

KR1020140094048A ＬＥＤ채널의 단락 감지오류를 방지하는 ＬＥＤ 드라이버 有权
标题翻译： LED驱动器，用于防止短路检测LED通道的错误
公开(公告)号：KR1020140094048A
公开(公告)日：2014-07-30
申请号：KR1020130004208
申请日：2013-01-15
申请人： (주)실리콘인사이드
发明人： 김종선 , 정해양 , 배성호 , 김근오
IPC分类号： H05B37/03
CPC分类号： H05B33/0818 , H05B33/0884 , Y02B20/42
摘要： The present invention relates to an LED driver for preventing errors of detecting a short circuit of an LED channel, and more specifically, to a technique for preventing the errors of detecting the short circuit of the LED channel by controlling a feedback responding speed when the drastic variation of an analog dimming signal for an LED dimming operation exists. The present invention provides the LED driver comprising: an analog dimming signal delay part for controlling the responding speed of the analog dimming signal (ADIM) before outputting; a voltage comparing part which primarily receives the output of the analog dimming signal delay part and secondarily receives feedback voltage (VFB) for comparing the voltage levels thereof and outputting the voltage levels; a short circuit determining part for determining the short circuit to be generated in the LED channel when the output of the voltage comparing part is measured to be a value equal to or less than a particular short detect level; an LED channel voltage generation part for increasing LED channel voltage (VLED) supplied to the LED channel before supplying when the output of the voltage comparing part is (+) and decreasing the LED channel voltage before supplying when the output of the voltage comparing part is (-); a PWM dimming control part for turning on and off current flowing in the LED channel; and a feedback voltage detection part for secondarily inputting the feedback voltage (VFB) corresponding to the current flowing in the LED channel to the voltage comparing part.
摘要翻译： LED驱动器技术领域本发明涉及一种用于防止LED通道短路检测错误的LED驱动器，更具体地，涉及一种用于通过控制反射响应速度来防止LED通道短路的误差的技术存在用于LED调光操作的模拟调光信号的变化。本发明提供了一种LED驱动器，包括：模拟调光信号延迟部分，用于在输出之前控制模拟调光信号（ADIM）的响应速度; 电压比较部，主要接收模拟调光信号延迟部的输出，二次接收用于比较其电压电平并输出电压电平的反馈电压（VFB）; 当电压比较部分的输出被测量为等于或小于特定短检测电平的值时，确定在LED通道中产生的短路的短路确定部分; 用于在电压比较部分的输出为（+）时提供给LED通道的LED通道电压（VLED）和当电压比较部分的输出为（ - ）; PWM调光控制部分，用于接通和关闭在LED通道中流动的电流; 以及反馈电压检测部，用于将对应于在LED通道中流动的电流的反馈电压（VFB）二次输入到电压比较部。

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