JP7273356B2 - 点灯装置及び照明装置 - Google Patents
点灯装置及び照明装置 Download PDFInfo
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- JP7273356B2 JP7273356B2 JP2018185010A JP2018185010A JP7273356B2 JP 7273356 B2 JP7273356 B2 JP 7273356B2 JP 2018185010 A JP2018185010 A JP 2018185010A JP 2018185010 A JP2018185010 A JP 2018185010A JP 7273356 B2 JP7273356 B2 JP 7273356B2
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- Prior art keywords
- lighting device
- conversion circuit
- light source
- setting control
- pwm signal
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- 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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- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Description
12 点灯装置
13 光源
24 変換回路
25 制御部であるマイコン
28 比較器
Q1 スイッチング素子
S1 PWM信号
Claims (4)
- 一定周期で送信されるPWM信号のオン信号と、比較結果に応じて送信される前記PWM信号のオフ信号と、によりスイッチング素子がスイッチングされることで出力電流を定電流とする点灯装置であって、
前記スイッチング素子を備え、該スイッチング素子のスイッチングにより入力電力を変換して光源に供給する変換回路と;
前記変換回路の出力電流と所定の閾値電流とを比較する比較器と;
前記比較器による比較結果に応じて前記PWM信号のオフタイミングを設定する第1設定制御と、前記PWM信号のオフタイミングを直接設定する第2設定制御と、を備え、前記光源の調光度が所定の調光度以下の領域で前記第2設定制御を実施する制御部と;
を具備することを特徴とする点灯装置。 - 前記制御部は、前記光源の調光度が前記所定の調光度より大きいか否かに応じて前記第1設定制御と前記第2設定制御とを切り換える
ことを特徴とする請求項1記載の点灯装置。 - 前記制御部は、前記光源の調光度が前記所定の調光度より大きい領域では前記第1設定制御を行い、前記光源の調光度が前記所定の調光度以下の領域では前記第1設定制御と前記第2設定制御とのうちPWM信号のオフタイミングが早いほうに設定する
ことを特徴とする請求項1記載の点灯装置。 - 光源と;
請求項1ないし3いずれか一記載の点灯装置と;
を具備することを特徴とする照明装置。
Priority Applications (1)
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JP2018185010A JP7273356B2 (ja) | 2018-09-28 | 2018-09-28 | 点灯装置及び照明装置 |
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JP2018185010A JP7273356B2 (ja) | 2018-09-28 | 2018-09-28 | 点灯装置及び照明装置 |
Publications (2)
Publication Number | Publication Date |
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JP2020057453A JP2020057453A (ja) | 2020-04-09 |
JP7273356B2 true JP7273356B2 (ja) | 2023-05-15 |
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JP2018185010A Active JP7273356B2 (ja) | 2018-09-28 | 2018-09-28 | 点灯装置及び照明装置 |
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JP (1) | JP7273356B2 (ja) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016096101A (ja) | 2014-11-17 | 2016-05-26 | ルネサスエレクトロニクス株式会社 | Led駆動方法およびled駆動装置 |
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2018
- 2018-09-28 JP JP2018185010A patent/JP7273356B2/ja active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2016096101A (ja) | 2014-11-17 | 2016-05-26 | ルネサスエレクトロニクス株式会社 | Led駆動方法およびled駆動装置 |
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JP2020057453A (ja) | 2020-04-09 |
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