The present invention relates to an LED fail safety apparatus for a vehicle, which includes: a temperature compensation voltage input part for inputting a temperature compensation voltage according to the temperature of a light emitting diode (LED) module; a slope adjustment voltage input part for inputting a slope adjustment voltage to determine a current slope of the LED module; a first differentiator for outputting a first output voltage by amplifying a difference component between the temperature compensation voltage and the slope adjustment voltage; a luminance determining voltage input part for inputting a luminance determining voltage to set a reference current corresponding to luminance of the LED module; a second differentiator for outputting a second output voltage by amplifying a difference component between the first output voltage and the luminance determining voltage; and a voltage limiting part for applying a final output voltage to the LED module by limiting the second output voltage to set a current minimum value of the LED module. The objective of the present invention is to provide the LED fail safety apparatus for a vehicle capable of satisfying endurance ability as to an LED of an external lamp for a vehicle and preventing degradation and burning due to a high temperature.
본 발명은 LED(Light Emitting Module) 모듈의 온도에 따른 온도보상전압을 입력하는 온도보상전압 입력부, LED 모듈의 전류 기울기를 결정하기 위한 기울기조정전압을 입력하는 기울기조정전압 입력부, 온도보상전압과 기울기조정전압의 차 성분을 증폭하여 제1 출력전압을 출력하는 제1 차분기, LED 모듈의 휘도에 대응되는 기준전류를 설정하기 위한 휘도결정전압을 입력하는 휘도결정전압 입력부, 제1 출력전압과 상기 휘도결정전압의 차 성분을 증폭하여 제2 출력전압을 출력하는 제2 차분기 및 LED 모듈의 전류 최소값을 설정하기 위해 제2 출력전압을 제한하여 최종 출력전압을 LED 제어모듈로 인가하는 전압 제한부를 포함하는 것을 특징으로 한다.
FAIL SAFE APPARATUS OF LED FOR VEHICLE
차량용 LED 고장 보호 장치
2016-03-11
Patent
Elektronische Ressource
Koreanisch
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |