JP2012142305A - 交流led調光装置及びそれによる調光方法 - Google Patents
交流led調光装置及びそれによる調光方法 Download PDFInfo
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
- H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
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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]
- H05B45/10—Controlling the intensity of the light
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
【解決手段】交流電源の供給を受けて全波整流する整流部と、整流部により全波整流された電圧の印加を受け、全波整流された昇圧電圧を生成して、パルスイネーブル信号を生成する電圧変換部と、全波整流された昇圧電圧の印加を受け、パルスイネーブル信号に応答して交流LEDを調光するパルス幅変調信号を生成する制御部と、パルス幅変調信号の制御下で交流LEDを駆動するスイッチ部と、交流電源とスイッチ部の間に接続されて交流電源に含まれる電磁気干渉を除去する電磁気干渉フィルタ部と、を含む交流LEDの調光装置。
【選択図】図3
Description
102:電磁気干渉フィルタ部
104:整流部
106:電圧変換部
108:制御部
110:スイッチ部
VPWM:パルス幅変調信号
Pen_PWM:パルスイネーブル信号
L1,L2,L3,L4,L5,L6:インダクタ
C1,C61,C62,C71,C72,C73,C74,C75,C76:キャパシタ
D61,D62,D63,D64,D71,D72,D73,D74,D75:ダイオード
114:分圧回路
124:第1全波整流回路
116:パルス生成回路
126:デューティ比調節回路
136:タイマIC
146:第1増幅回路
156:第2電圧安定化回路
166:第2全波整流回路
176:ノイズフィルタ
118:矩形波パルス生成部
128:デューティ比制御回路
138:第2増幅回路
Q101、Q102:スイッチングトランジスタ
Qd101、Qd102:逆方向ダイオード
Claims (16)
- 交流電源と、
前記交流電源とLEDとの間に接続され、パルス幅変調信号により選択的にターンオンされて前記交流電源からの交流電圧を前記LEDに供給する双方向スイッチ部と、
を含み、
前記パルス幅変調信号は、前記交流電源と電気的に絶縁されて入力され、
前記LEDは、前記交流電源が前記LEDの順方向電圧以上になる区間の間、前記パルス幅変調信号に対応する前記交流電圧を受けて発光することを特徴とするLED調光装置。 - 前記スイッチ部は、
前記パルス幅変調信号を制御信号として動作する第1スイッチと、
前記第1スイッチに並列に接続される第1ダイオードと、
前記第1スイッチに直列に接続され、前記パルス幅変調信号を制御信号として動作する第2スイッチと、
前記第2スイッチに前記第1ダイオードの極性と反対の極性で並列に接続される第2ダイオードと、
を含むことを特徴とする請求項1に記載のLED調光装置。 - 前記LED調光装置は、
前記交流電圧の印加を受けて、前記交流電源と電気的に絶縁された前記パルス幅変調信号を生成するパルス幅変調信号生成手段をさらに含むことを特徴とする請求項1に記載のLED調光装置。 - 前記パルス幅変調信号生成手段は、
前記交流電源からの前記交流電圧の印加を受けて所定レベルの第1電源を生成する整流部と、
前記第1電源の印加を受けて駆動され、前記印加された第1電源を用いて前記交流電源と電気的に絶縁された所定のデューティ比を有するパルスイネーブル信号及び第2電源を生成して出力する電圧変換部と、
前記第2電源によって駆動され、前記パルスイネーブル信号の前記デューティ比を制御し、前記パルス幅変調信号を生成して前記スイッチ部に出力する制御部と、
を含むことを特徴とする請求項3に記載のLED調光装置。 - 前記電圧変換部は、前記交流電源と前記パルスイネーブル信号及び前記第2電源を電気的に絶縁する絶縁型変圧器を含むことを特徴とする請求項4に記載のLED調光装置。
- 前記交流電源と前記スイッチ部との間に接続され、前記交流電圧に含まれる電磁気干渉を除去する電磁気干渉フィルタ部をさらに含むことを特徴とする請求項1に記載のLED調光装置。
- 前記電磁気干渉フィルタ部は、フィルタキャパシタ及びインダクタを含むラインフィルタであることを特徴とする請求項6に記載のLED調光装置。
- 前記インダクタは、2段以上で直列接続されることを特徴とする請求項7に記載のLED調光装置。
- 前記整流部は、
前記交流電圧を分圧する分圧回路と、
前記分圧回路により分圧された電圧を全波整流する第1全波整流回路と、
前記第1全波整流回路により全波整流された電圧を安定化させ、前記第1電源を生成する第1電圧安定化回路と、
を含むことを特徴とする請求項4に記載のLED調光装置。 - 前記分圧回路は、
前記交流電源に接続された分圧用キャパシタと、
前記分圧用キャパシタに直列接続された抵抗素子と、
を含み、
前記第1全波整流回路は、前記分圧回路と前記第1電圧安定化回路との間に接続されることを特徴とする請求項9に記載のLED調光装置。 - 前記分圧回路は、
前記第1全波整流回路の入力段に並列接続され、所定のツェナー電圧を提供する一対のツェナーダイオードをさらに含むことを特徴とする請求項10に記載のLED調光装置。 - 前記電圧変換部は、
前記整流部からの前記第1電源の印加を受けてパルス信号を生成するパルス生成回路と、
前記パルス信号の印加を受けて矩形波信号を生成する第1増幅回路と、
1次側で前記矩形波信号の印加を受けて2次側に昇圧された電圧を誘導する絶縁型変圧器と、
前記絶縁型変圧器の2次側に誘導される電圧を全波整流し、前記パルスイネーブル信号を出力する第2全波整流回路と、
前記第2全波整流回路により全波整流された前記パルスイネーブル信号を安定化させ、前記第2電源を生成する第2電圧安定化回路と、
を含むことを特徴とする請求項4に記載のLED調光装置。 - 前記絶縁型変圧器の1次側接地端と前記電圧変換部の出力段の接地端との間には、ノイズフィルタがさらに含まれることを特徴とする請求項12に記載のLED調光装置。
- 前記第1増幅回路の出力段と前記変圧器の1次側との間には、直流遮断キャパシタがさらに直列接続されることを特徴とする請求項12に記載のLED調光装置。
- 前記制御部は、
矩形波パルスのデューティ比を制御するデューティ比制御回路と、
前記第2電源の印加を受けて駆動され、前記パルスイネーブル信号の印加を受けて前記矩形波パルスを第1レベルに遷移させ、前記デューティ比制御回路の制御により前記矩形波パルスを第2レベルに遷移させる矩形波パルス生成部と、
前記矩形波パルス生成部の出力の印加を受けて前記パルス幅変調信号を出力する第2増幅回路と、
を含むことを特徴とする請求項4に記載のLED調光装置。 - 前記スイッチ部は、
前記パルス幅変調信号が第1レベルの場合、前記交流電圧の正の半周期の間は第1動作モードを有し、前記交流電圧の負の半周期の間は第2動作モードを有することを特徴とする請求項1に記載のLED調光装置。
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JP2010062150A (ja) | 2010-03-18 |
US20100060181A1 (en) | 2010-03-11 |
US8901841B2 (en) | 2014-12-02 |
TW201014461A (en) | 2010-04-01 |
DE102009040240B4 (de) | 2013-07-25 |
TWI422275B (zh) | 2014-01-01 |
US20130093341A1 (en) | 2013-04-18 |
US8324823B2 (en) | 2012-12-04 |
KR20100028833A (ko) | 2010-03-15 |
DE102009040240A1 (de) | 2010-04-15 |
JP5265488B2 (ja) | 2013-08-14 |
KR101001241B1 (ko) | 2010-12-17 |
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