JP4772366B2 - 色順次式led駆動回路 - Google Patents
色順次式led駆動回路 Download PDFInfo
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- JP4772366B2 JP4772366B2 JP2005118805A JP2005118805A JP4772366B2 JP 4772366 B2 JP4772366 B2 JP 4772366B2 JP 2005118805 A JP2005118805 A JP 2005118805A JP 2005118805 A JP2005118805 A JP 2005118805A JP 4772366 B2 JP4772366 B2 JP 4772366B2
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- circuit
- switching
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- power supply
- voltage
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- 238000001514 detection method Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Led Devices (AREA)
Description
2 スイッチング電源回路
3 第1切替回路
4 電圧検出回路
5 第2切替回路
Claims (1)
- PWM制御方式により安定化された電圧を出力するスイッチング電源回路と、定電流ドライバと、発光色の異なる複数のLEDと、外部から与えられる色切替信号に応答して各色LEDを順次1つずつスイッチング電源回路と定電流ドライバに接続して定電流駆動させる第1切替回路を備えた色順次式LED駆動回路であって、
スイッチング電源回路は、出力電圧に対応した帰還電圧信号を発生する電圧検出回路と、基準電圧信号を発生する基準電圧発生回路とを有し、帰還電圧信号と基準電圧信号の偏差に応じてPWM制御を行うものであり、かつ、電圧検出回路または基準電圧発生回路には色切替信号に応答して切替動作する第2切替回路が含まれ、第2切替回路によって各色LED駆動期間における出力電圧が切り替えられ、
第2切替回路によって切り替えられる回路は、各色LEDのそれぞれの温度補償素子を含み、各色LED駆動期間における出力電圧は、各色LEDの温度特性を補償するように変化する
色順次式LED駆動回路。
Priority Applications (1)
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JP2005118805A JP4772366B2 (ja) | 2005-04-15 | 2005-04-15 | 色順次式led駆動回路 |
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JP2005118805A JP4772366B2 (ja) | 2005-04-15 | 2005-04-15 | 色順次式led駆動回路 |
Publications (2)
Publication Number | Publication Date |
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JP2006301027A JP2006301027A (ja) | 2006-11-02 |
JP4772366B2 true JP4772366B2 (ja) | 2011-09-14 |
Family
ID=37469429
Family Applications (1)
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JP2005118805A Active JP4772366B2 (ja) | 2005-04-15 | 2005-04-15 | 色順次式led駆動回路 |
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JP (1) | JP4772366B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9370066B2 (en) | 2013-11-29 | 2016-06-14 | Samsung Display Co., Ltd. | Light emitting device including light emitting diode and driving method thereof |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009028863A2 (en) * | 2007-08-27 | 2009-03-05 | Inix Co., Ltd. | Method and apparatus for thermal control of led device |
JP2010199501A (ja) * | 2009-02-27 | 2010-09-09 | Mitsubishi Electric Corp | Led装置と、そのled装置を用いた映像装置 |
JP4975856B2 (ja) | 2010-09-24 | 2012-07-11 | シャープ株式会社 | 照明装置用集積回路および照明装置 |
US9768150B2 (en) * | 2014-04-01 | 2017-09-19 | Epistar Corporation | LED display and method for manufacturing the same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6734875B1 (en) * | 1999-03-24 | 2004-05-11 | Avix, Inc. | Fullcolor LED display system |
JP2001215913A (ja) * | 2000-02-04 | 2001-08-10 | Toko Inc | 点灯回路 |
JP2002244619A (ja) * | 2001-02-15 | 2002-08-30 | Sony Corp | Led表示装置の駆動回路 |
JP2005026431A (ja) * | 2003-07-01 | 2005-01-27 | Hunet Inc | 発光ダイオード駆動回路 |
-
2005
- 2005-04-15 JP JP2005118805A patent/JP4772366B2/ja active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9370066B2 (en) | 2013-11-29 | 2016-06-14 | Samsung Display Co., Ltd. | Light emitting device including light emitting diode and driving method thereof |
Also Published As
Publication number | Publication date |
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JP2006301027A (ja) | 2006-11-02 |
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