JP4971254B2 - Led点灯装置 - Google Patents
Led点灯装置 Download PDFInfo
- Publication number
- JP4971254B2 JP4971254B2 JP2008160951A JP2008160951A JP4971254B2 JP 4971254 B2 JP4971254 B2 JP 4971254B2 JP 2008160951 A JP2008160951 A JP 2008160951A JP 2008160951 A JP2008160951 A JP 2008160951A JP 4971254 B2 JP4971254 B2 JP 4971254B2
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- JP
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- Prior art keywords
- led
- voltage
- series circuit
- circuit
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003990 capacitor Substances 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 230000020169 heat generation Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Led Devices (AREA)
Description
5 点灯ユニット(点灯制御部)
Claims (1)
- 直列接続された複数のLEDを具備したLED直列回路と、このLED直列回路に電力を供給して点灯させる点灯制御部と、を備えたLED点灯装置であって、
前記点灯制御部は、
所定の入力電圧を降圧して前記LED直列回路へ電力供給する降圧回路であって、前記LED直列回路への電力供給を制御するためのスイッチング素子を含む前記降圧回路と、
前記LED直列回路に供給される出力電流をフィードバックし、該フィードバックされる出力電流値と前記LED直列回路におけるLED駆動電流として予め設定された定電流値とを比較して該出力電流値が該定電流値を超えないようにするために電流設定用フィードバック信号を発生する定電流制御回路と、
前記LED直列回路に印加される出力電圧をフィードバックし、該フィードバックされる出力電圧値と前記LED直列回路における前記LEDの最大接続可能数に対応して予め設定された定電圧値とを比較して該出力電圧値が該定電圧値を超えないようにするために電圧設定用フィードバック信号を発生する定電圧制御回路と、
前記電流設定用フィードバック信号と前記電圧設定用フィードバック信号とによって前記スイッチング素子を駆動するスイッチング制御回路と、
を備え、前記最大接続可能数以下の任意の数のLEDが前記LED直列回路に接続されているときは、前記定電流制御回路により前記LED直列回路に供給する電力を定電流制御し、前記最大接続可能数よりも多いLEDが前記LED直列回路に接続されているとき又は前記LED直列回路に断線が生じたときは、前記定電圧制御回路により前記LED直列回路に供給する電力を定電圧制御し、前記最大接続可能数以下の任意の数のLEDを接続可能としたことを特徴とするLED点灯装置。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008160951A JP4971254B2 (ja) | 2008-06-19 | 2008-06-19 | Led点灯装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008160951A JP4971254B2 (ja) | 2008-06-19 | 2008-06-19 | Led点灯装置 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005180239A Division JP2007004995A (ja) | 2005-06-21 | 2005-06-21 | Led点灯装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008283206A JP2008283206A (ja) | 2008-11-20 |
JP4971254B2 true JP4971254B2 (ja) | 2012-07-11 |
Family
ID=40143701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008160951A Active JP4971254B2 (ja) | 2008-06-19 | 2008-06-19 | Led点灯装置 |
Country Status (1)
Country | Link |
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JP (1) | JP4971254B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101904806B1 (ko) | 2018-04-06 | 2018-11-30 | 주식회사 다온시스템 | 정전력 led 컨버터 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101715267B (zh) * | 2009-11-05 | 2012-11-28 | 英飞特电子(杭州)股份有限公司 | 一种适用于led驱动器的两路均流控制电路 |
JP5537286B2 (ja) * | 2010-06-28 | 2014-07-02 | パナソニック株式会社 | Led点灯装置 |
JP6038226B2 (ja) * | 2015-05-15 | 2016-12-07 | 三菱電機株式会社 | 点灯装置及び照明装置 |
CN114340086B (zh) * | 2022-01-14 | 2024-04-09 | 英飞特电子(杭州)股份有限公司 | 一种照明***、目标电压值确定方法、***及相关组件 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0622541A (ja) * | 1992-06-30 | 1994-01-28 | Canon Inc | 制御電源装置 |
JPH06250747A (ja) * | 1993-02-22 | 1994-09-09 | Mitsubishi Electric Corp | 基準光源ランプ用スイッチング電源 |
AU1889201A (en) * | 1999-12-14 | 2001-06-25 | Takion Co., Ltd. | Power supply and led lamp device |
JP2006085993A (ja) * | 2004-09-15 | 2006-03-30 | Denso Corp | 発光ダイオード点灯装置 |
-
2008
- 2008-06-19 JP JP2008160951A patent/JP4971254B2/ja active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101904806B1 (ko) | 2018-04-06 | 2018-11-30 | 주식회사 다온시스템 | 정전력 led 컨버터 |
Also Published As
Publication number | Publication date |
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JP2008283206A (ja) | 2008-11-20 |
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