JP5016322B2 - Led制御システム - Google Patents
Led制御システム Download PDFInfo
- Publication number
- JP5016322B2 JP5016322B2 JP2007043851A JP2007043851A JP5016322B2 JP 5016322 B2 JP5016322 B2 JP 5016322B2 JP 2007043851 A JP2007043851 A JP 2007043851A JP 2007043851 A JP2007043851 A JP 2007043851A JP 5016322 B2 JP5016322 B2 JP 5016322B2
- Authority
- JP
- Japan
- Prior art keywords
- led
- light output
- leds
- red
- time
- 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.)
- Expired - Fee Related
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Classifications
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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
Landscapes
- Led Devices (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Description
2 LED(発光ダイオード)
3 センサ
4 制御部
Claims (4)
- 複数のLEDと、少なくともLEDの一部を点灯させて各々の光出力を測定するセンサと、前記センサの測定結果に応じて前記複数のLEDの出力を個別に制御する制御部と、を備えたLED制御システムにおいて、
前記LEDは、PWM信号のオンデューティ比に基づいて点灯制御され、
前記制御部は、前記センサによる前記LEDの光出力の測定時に、前記PWM信号の1周期内で通常点灯時におけるオンデューティ比を変更することなくオンデューティ開始タイミングをシフトさせ、全てのLEDをオンとし、全てのLEDの光出力を測定した後、前記各LEDのPWM信号のオン時間が互いに重複する各時点及び重複しない各時点で前記LEDの光出力を測定し、全てのLEDの光出力値及び前記各時点の光出力値の差分から前記各LEDの光出力を算出し、該算出結果に応じて前記LEDを制御することを特徴とするLED制御システム。 - 前記制御部は、前記LEDの光出力の測定時に、前記LEDのPWM信号のオン時間が互いに重複する時間を増やすように、前記LEDのオンデューティ開始タイミングをシフトさせることを特徴とした請求項1に記載のLED制御システム。
- 前記LEDの光出力の測定時における該LEDへの電流を可変とすることを特徴とした請求項1又は請求項2に記載のLED制御システム。
- 前記LEDは、それぞれ赤緑青の3色を発光するものであることを特徴とする請求項1乃至請求項3のいずれか一項に記載のLED制御システム。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007043851A JP5016322B2 (ja) | 2007-02-23 | 2007-02-23 | Led制御システム |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007043851A JP5016322B2 (ja) | 2007-02-23 | 2007-02-23 | Led制御システム |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008210853A JP2008210853A (ja) | 2008-09-11 |
JP5016322B2 true JP5016322B2 (ja) | 2012-09-05 |
Family
ID=39786937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007043851A Expired - Fee Related JP5016322B2 (ja) | 2007-02-23 | 2007-02-23 | Led制御システム |
Country Status (1)
Country | Link |
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JP (1) | JP5016322B2 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010028406A1 (de) * | 2010-02-12 | 2011-08-18 | Osram Gesellschaft mit beschränkter Haftung, 81543 | LED-Leuchtvorrichtung und Verfahren zum Betreiben einer LED-Leuchtvorrichtung |
JP2012145755A (ja) * | 2011-01-12 | 2012-08-02 | Konica Minolta Advanced Layers Inc | 画像表示装置 |
JP5595941B2 (ja) * | 2011-01-14 | 2014-09-24 | シャープ株式会社 | 発光ダイオード点灯制御回路および発光ダイオード点灯制御方法 |
JP7162243B2 (ja) * | 2018-10-16 | 2022-10-28 | パナソニックIpマネジメント株式会社 | 半導体光源駆動装置及び投射型映像表示装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4253292B2 (ja) * | 2002-03-01 | 2009-04-08 | シャープ株式会社 | 発光装置並びに該発光装置を用いた表示装置及び読み取り装置 |
JP2006276379A (ja) * | 2005-03-29 | 2006-10-12 | Matsushita Electric Ind Co Ltd | 照明装置 |
-
2007
- 2007-02-23 JP JP2007043851A patent/JP5016322B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JP2008210853A (ja) | 2008-09-11 |
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