KR100861252B1 - 저항을 이용한 다수의 발광다이오드 점등회로 - Google Patents
저항을 이용한 다수의 발광다이오드 점등회로 Download PDFInfo
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- KR100861252B1 KR100861252B1 KR1020080010512A KR20080010512A KR100861252B1 KR 100861252 B1 KR100861252 B1 KR 100861252B1 KR 1020080010512 A KR1020080010512 A KR 1020080010512A KR 20080010512 A KR20080010512 A KR 20080010512A KR 100861252 B1 KR100861252 B1 KR 100861252B1
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- light emitting
- emitting diodes
- emitting diode
- constant current
- resistors
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- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000002950 deficient Effects 0.000 description 3
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
- H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
이에 따라 상기 제1,제2,제3ㆍㆍㆍ제n 저항(R11,R12,R13,ㆍㆍㆍRn)의 양단에 제1,제2,제3ㆍㆍㆍ제n 정전류수단(11,12,13ㆍㆍㆍn)이 직렬로 각각 접속되어 있으므로, 상기 제1,제2,제3ㆍㆍㆍ제n 정전류수단(11,12,13ㆍㆍㆍn)에서 출력되는 일정레벨의 정전류가 제1, 제2,제3ㆍㆍㆍ제n 발광다이오드(LED21,LED22,LED23ㆍㆍㆍLED2n)를 통해서 흐르게 함으로서, 제1,제2,제3ㆍㆍㆍ제n 발광다이오드(LED21,LED22,LED23ㆍㆍㆍLED2n)를 점등시킨다.
그런데, 상기 제1,제2,제3ㆍㆍㆍ제n 정전류수단(11,12,13ㆍㆍㆍn) 중에서 어느 하나가 개방되는 고장이 발생하면 고장이 발생된 정전류수단의 출력단에 접속된 발광다이오드에는 전류가 흐르지 않으므로, 나머지 정전류수단의 출력단에 접속된 발광다이오드만이 점등되지 않고, 나머지 정전류수단에 접속된 발광다이오드는 점등된다.
상기 설명에 있어서, 상기 정전류수단은 그 입력단에 퓨즈가 설치되어 있으므로, 정전류수단에 외부 요인에 의해 과전압 등이 인가되면 정전류수단의 입력단에 설치된 퓨즈가 먼저 끊어지므로, 정전류수단의 양단이 단락되는 경우가 전혀없고, 또한 상기 발광다이오드가 고장이 발생된다는 것은 상기 발광다이오드의 양단이 개방되는 고장을 의미하므로, 상기 발광다이오드의 단락되는 고장발생은 전혀 없으며, 저항이 고장 났다는 의미는 저항이 개방된 고장을 말하며, 저항이 단락되는 고장은 발생되지 않는 다.
그리고 본원 발명에서 정전류수단은 입력전원의 크기에 관련없이 일정한 전류를 출력하므로, 정전류수단의 출력단에 접속된 발광다이오드에는 일정한 전압이 인가됨에 따라 발광다이오드를 통해서 흐르는 전류도 항상 일정한 전류가 흐르는 것은 물론이다.
Claims (1)
- 점등회로는 스위치(SW) 온시에 교류전원(Vac) 또는 직류전원(Vdc)을 공급하는 전원부(10)와, 상기 전원부(10)에 직렬로 순차적으로 접속된 제1,제2,제3ㆍㆍㆍ제n 저항(R11,R12,R13,ㆍㆍㆍRn)과, 상기 제1제2,제3ㆍㆍㆍ제n 저항(R11,R12,R13,ㆍㆍㆍRn)에 각각 접속되어 일정레벨의 정전류를 출력하는 제1,제2,제3ㆍㆍㆍ제n 정전류수단(11,12,13ㆍㆍㆍn)과. 상기 제1,제2,제3ㆍㆍㆍ제n 정전류수단(11,12,13ㆍㆍㆍn)에 직렬로 접속되어 상기 제1,제2,제3ㆍㆍㆍ제n 정전류수단(11,12,13ㆍㆍㆍn)에서 출력되는 전류가 흐름에 따라 발광되는 제1, 제2,제3ㆍㆍㆍ제n 발광다이오드(LED21,LED22,LED23ㆍㆍㆍLED2n)로 구성되어 있는 것을 특징으로 하는 저항을 이용한 다수의 발광다이오드 점등회로.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080010512A KR100861252B1 (ko) | 2008-02-01 | 2008-02-01 | 저항을 이용한 다수의 발광다이오드 점등회로 |
Applications Claiming Priority (1)
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KR1020080010512A KR100861252B1 (ko) | 2008-02-01 | 2008-02-01 | 저항을 이용한 다수의 발광다이오드 점등회로 |
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Publication Number | Publication Date |
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KR100861252B1 true KR100861252B1 (ko) | 2008-10-02 |
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KR1020080010512A Active KR100861252B1 (ko) | 2008-02-01 | 2008-02-01 | 저항을 이용한 다수의 발광다이오드 점등회로 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120001568A1 (en) * | 2010-07-05 | 2012-01-05 | Lee Keon Young | Light emitting apparatus using ac led |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050045749A (ko) * | 2003-11-12 | 2005-05-17 | (주)크레스라이트 | 발광다이오드용 정전류회로 |
KR20050097162A (ko) * | 2004-03-31 | 2005-10-07 | 서울반도체 주식회사 | 발광다이오드 디스플레이 |
KR20060133445A (ko) * | 2004-04-20 | 2006-12-26 | 소니 가부시끼 가이샤 | 정전류구동장치, 백라이트 광원장치 및 컬러액정표시장치 |
KR20070049735A (ko) * | 2005-11-09 | 2007-05-14 | 주식회사 유양정보통신 | 발광 다이오드 정전류 펄스폭 변조 구동 회로 |
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2008
- 2008-02-01 KR KR1020080010512A patent/KR100861252B1/ko active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20050045749A (ko) * | 2003-11-12 | 2005-05-17 | (주)크레스라이트 | 발광다이오드용 정전류회로 |
KR20050097162A (ko) * | 2004-03-31 | 2005-10-07 | 서울반도체 주식회사 | 발광다이오드 디스플레이 |
KR20060133445A (ko) * | 2004-04-20 | 2006-12-26 | 소니 가부시끼 가이샤 | 정전류구동장치, 백라이트 광원장치 및 컬러액정표시장치 |
KR20070049735A (ko) * | 2005-11-09 | 2007-05-14 | 주식회사 유양정보통신 | 발광 다이오드 정전류 펄스폭 변조 구동 회로 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120001568A1 (en) * | 2010-07-05 | 2012-01-05 | Lee Keon Young | Light emitting apparatus using ac led |
US8569961B2 (en) * | 2010-07-05 | 2013-10-29 | Kwangsung Electronic Industry Co., Ltd. | Light emitting apparatus using AC LED |
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