KR102300560B1 - Led 구동 장치 및 그를 포함하는 조명 장치 - Google Patents
Led 구동 장치 및 그를 포함하는 조명 장치 Download PDFInfo
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- KR102300560B1 KR102300560B1 KR1020150091011A KR20150091011A KR102300560B1 KR 102300560 B1 KR102300560 B1 KR 102300560B1 KR 1020150091011 A KR1020150091011 A KR 1020150091011A KR 20150091011 A KR20150091011 A KR 20150091011A KR 102300560 B1 KR102300560 B1 KR 102300560B1
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Abstract
Description
도 2 및 도 3은 본 발명의 일 실시예에 따른 LED 구동 장치를 설명하기 위해 제공되는 회로도이다.
도 4는 도 2 및 도 3에 도시한 LED 구동 장치를 설명하기 위해 제공되는 파형도이다.
도 5는 본 발명의 일 실시예에 따른 LED 구동 장치를 설명하기 위해 제공되는 회로도이다.
도 6은 도 5에 도시한 LED 구동 장치를 설명하기 위해 제공되는 파형도이다.
도 7 내지 도 12는 본 발명의 일 실시예에 따른 조명 장치에 적용될 수 있는 반도체 발광소자를 나타낸 도이다.
도 13a 및 도 13b는 본 발명의 일 실시예에 따른 조명 장치에 적용될 수 있는 백색 광원 모듈을 간단하게 나타내는 도이다.
도 14는 도 13a 및 도 13b에 도시한 백색 광원 모듈의 동작을 설명하기 위해 제공되는 CIE 1931 좌표계이다.
도 15는 본 발명의 실시예에 따른 조명 장치의 광원에 적용될 수 있는 파장 변환 물질을 설명하기 위해 제공되는 도이다.
도 16 내지 도 24은 본 발명의 일 실시예에 따른 LED 구동 장치를 포함하는 백라이트 유닛을 설명하기 위해 제공되는 도이다.
도 25은 본 발명의 일 실시예에 따른 LED 구동 장치를 포함하는 백라이트 유닛이 채용된 디스플레이 장치의 개략적인 분해사시도이다.
도 26 내지 도 29는 본 발명의 일 실시예에 따른 조명 장치를 나타낸 도이다.
도 30 내지 도 32는 본 발명의 일 실시예에 따른 LED 구동 장치를 포함하는 조명 네트워크 시스템을 설명하기 위한 개략도이다.
110, 210, 310: LED 구동 장치
112, 212, 312: 컨트롤러 IC
113, 213, 313: 전류 제어 회로
120, 220, 320: 광원
130, 230, 330: 전원
Claims (10)
- 교류 전원을 정류하여 복수의 LED 어레이를 동작하기 위한 구동 전원을 생성하는 정류 회로;
상기 복수의 LED 어레이 각각의 출력단에 연결되는 복수의 내부 스위치를 포함하며, 상기 구동 전원의 크기에 따라 상기 복수의 내부 스위치의 동작을 조절하여 상기 복수의 LED 어레이에 흐르는 전류의 경로를 제어하는 컨트롤러 IC; 및
상기 복수의 LED 어레이 중 적어도 하나의 출력단에 연결되며, 상기 컨트롤러 IC에 흐르는 전류를 끌어당기는 전류 제어 회로; 를 포함하고,
상기 복수의 LED 어레이는 인가된 전류가 먼저 흐르는 제1 LED 어레이, 및 상기 인가된 전류가 마지막으로 흐르는 마지막 LED 어레이를 포함하고,
상기 복수의 내부 스위치 중 마지막 내부 스위치는 상기 마지막 LED 어레이의 출력단에 연결되고,
상기 전류 제어 회로의 일단은 상기 마지막 LED 어레이의 출력단과 상기 마지막 내부 스위치의 입력단에 공통적으로 연결되며, 상기 전류 제어 회로의 타단은 접지단에 연결되는 것을 특징으로 하는 LED 구동 장치.
- 삭제
- 제1항에 있어서,
상기 적어도 하나의 LED 어레이에 흐르는 전류는, 상기 전류 제어 회로와 상기 마지막 내부 스위치에 분산되는 것을 특징으로 하는 LED 구동 장치.
- 제1항에 있어서,
상기 전류 제어 회로는, 상기 마지막 LED 어레이의 출력단에 연결되는 외부 스위치 소자, 상기 외부 스위치 소자의 출력단과 상기 마지막 내부 스위치 사이에 연결되는 제1 저항, 및 상기 외부 스위치 소자의 출력단과 접지단 사이에 연결되는 제2 저항을 포함하는 것을 특징으로 하는 LED 구동 장치.
- 제4항에 있어서,
상기 제1 저항과 상기 제2 저항의 비율에 의해 상기 전류 제어 회로와 상기 적어도 하나의 내부 스위치 각각에 흐르는 전류의 비율이 결정되는 것을 특징으로 하는 LED 구동 장치.
- 제1항에 있어서,
상기 적어도 하나의 LED 어레이가 상기 구동 전원의 한 주기 내에서 발광하는 시간은, 다른 LED 어레이가 상기 구동 전원의 한 주기 내에서 발광하는 시간보다 짧은 것을 특징으로 하는 LED 구동 장치.
- 복수의 LED 어레이를 포함하는 광원;
상기 복수의 LED 어레이 각각의 출력단에 연결되는 복수의 내부 스위치를 포함하며, 상기 광원에 공급되는 구동 전원의 크기에 따라 상기 복수의 내부 스위치의 동작을 조절하여 상기 복수의 LED 어레이에 흐르는 전류의 경로를 제어하는 컨트롤러 IC; 및
상기 복수의 LED 어레이 중 적어도 하나의 출력단에 연결되며, 상기 적어도 하나의 LED 어레이에 흐르는 전류를 조절하는 전류 제어 회로; 를 포함하고,
상기 복수의 LED 어레이는 인가된 전류가 먼저 흐르는 제1 LED 어레이, 및 상기 인가된 전류가 마지막으로 흐르는 마지막 LED 어레이를 포함하고,
상기 전류 제어 회로는 상기 복수의 내부 스위치 중 마지막 스위치에 연결된 적어도 하나의 전압 분배기를 포함하며, 상기 마지막 스위치가 닫힐 때, 상기 마지막 LED 어레이로부터 출력된 전류가 상기 마지막 스위치와 상기 전압 분배기를 통과하는 것을 특징으로 하는 조명 장치.
- 제7항에 있어서,
상기 적어도 하나의 LED 어레이는, 상기 구동 전원의 한 주기 내에서 다른 LED 어레이보다 짧은 발광 시간을 갖는 것을 특징으로 하는 조명 장치.
- 제7항에 있어서,
상기 적어도 하나의 LED 어레이는 다른 LED 어레이와 함께 턴-온되는 것을 특징으로 하는 조명 장치.
- 제7항에 있어서,
상기 전류 제어 회로는, 상기 적어도 하나의 LED 어레이에 흐르는 전류의 일부를 끌어오는 것을 특징으로 하는 조명 장치.
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