JP4152885B2 - Led制御装置 - Google Patents
Led制御装置 Download PDFInfo
- Publication number
- JP4152885B2 JP4152885B2 JP2003539396A JP2003539396A JP4152885B2 JP 4152885 B2 JP4152885 B2 JP 4152885B2 JP 2003539396 A JP2003539396 A JP 2003539396A JP 2003539396 A JP2003539396 A JP 2003539396A JP 4152885 B2 JP4152885 B2 JP 4152885B2
- Authority
- JP
- Japan
- Prior art keywords
- led
- green
- red
- photodiode
- output signal
- 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
-
- 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]
- H05B45/20—Controlling the colour of the light
- H05B45/22—Controlling the colour of the light using optical feedback
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S362/00—Illumination
- Y10S362/80—Light emitting diode
Description
LED発光体の赤、緑及び青LEDの各々に対するフィルタ付きホトダイオードの出力信号を測定するステップと;
LED発光体の赤、緑及び青LEDの各々に対するフィルタ無しホトダイオードの出力信号を測定するステップと;
赤、緑及び青LEDの各々に対するフィルタ付きホトダイオードの出力信号をフィルタ無しホトダイオードの出力信号で割ることによってホトダイオードの出力信号比を計算するステップと;
該ホトダイオードの出力信号比を利用して、赤、緑及び青LEDの各々に対する色度座標を決定するステップと;
赤、緑及び青LEDの各々に対する順方向電流を調整して、所望する色の光を発生するステップと;
を含むようにする。
前記LED発光体によって発生される混合した色の光を表わすと共に、ホトダイオードの出力信号に相当する帰還値を発生する帰還ユニット;及び
前記帰還値と、所望される混合した色の光を表わす基準値との差を取得し、その差に従って前記順方向電流を調整するコントローラ;
を含むようにする。
Claims (12)
- 順方向電流によって駆動されて、混合した色の光を発生する赤、緑及び青の発光ダイオードを含むLED発光体制御システムが:
前記LED発光体によって発生される混合した色の光を表わす帰還値を生成し、該帰還値がホトダイオードの出力信号に相当する、帰還値生成用の帰還ユニットと;
前記帰還ユニットに作動的に結合され、前記帰還値と所望される混合した色の光を表わす基準値との差を求めて、該差に基づいて制御電圧及び順方向電流のうちの少なくとも1つを調整するコントローラと;
を具え、
前記帰還ユニットが、前記各赤、緑及び青LEDに対応する第1、第2及び第3のフィルタ付きホトダイオードと、1つのフィルタ無しホトダイオードも具え、前記帰還ユニットが、前記各赤、緑及び青LEDに対する前記第1、第2及び第3ホトダイオードの出力信号と、前記フィルタ無しホトダイオードの出力信号とを生成し;且つ
前記コントローラが、前記赤、緑及び青LEDに対するフィルタ付きホトダイオードの出力信号を前記赤、緑及び青LEDに対するフィルタ無しホトダイオードの出力信号で割ることによりホトダイオードの出力信号比を計算し、該ホトダイオードの出力信号比を利用して、各赤、緑及び青LEDに対する色度座標を求め、且つ各赤、緑及び青LEDに対する順方向電流を調整して、所望される混合した色の光を発生するようにしたことを特徴とするLED発光体制御システム。 - 前記コントローラが、各赤、緑及び青LEDに対するホトダイオードの出力信号比と色度座標との関係を含むルック−アップテーブルにアクセスすることによって各赤、緑及び青LEDに対する色度座標を決定するようにしたことを特徴とする請求項1に記載のLED発光体制御システム。
- 前記帰還ユニットが、前記ホトダイオードの出力光電流を電圧信号に変換するための増幅兼信号変換回路も具えていることを特徴とする請求項1に記載のLED発光体制御システム。
- 前記帰還ユニットが前記帰還値を前記コントローラに供給する手段も具えていることを特徴とする請求項1に記載のLED発光体制御システム。
- 前記コントローラに作動的に結合されて、ユーザに前記所望される混合した色の光を選択させるユーザインタフェースも具えていることを特徴とする請求項1に記載のLED発光体制御システム。
- 前記コントローラに作動的に結合されて、前記所望される混合した色の光を表わす基準値を記憶し、且つ前記コントローラに供給するメモリも具えていることを特徴とする請求項5に記載のLED発光体制御システム。
- 前記基準値がCIE 1931色度座標系の色度座標に相当することを特徴とする請求項1に記載のLED発光体制御システム。
- 前記基準値がRGB表色系の色度座標に相当することを特徴とする請求項1に記載のLED発光体制御システム。
- 前記コントローラに作動的に結合され、前記帰還値と前記基準値との前記差に基づいて制御電圧を発生する電圧発生器も具え、前記コントローラが、前記LED発光体の赤、緑及び青LEDの各々に対する順方向電流を調整するように、前記各赤、緑及び青LEDドライバに前記制御電圧を供給して、所望される色の光を発生するようにしたことを特徴とする請求項1に記載のLED発光体制御システム。
- 前記コントローラに作動的に結合され、ユーザが選択し得る複数の所望される混合した色の光を事前記憶するメモリも具えていることを特徴とする請求項1に記載のLED発光体制御システム。
- 順方向電流によって駆動されて、混合した色の光を発生する赤、緑及び青の発光ダイオードを含む、LED発光体の制御方法であって、
各赤、緑及び青LEDに対応するフィルタ付きホトダイオードの出力信号を測定するステップと、
LED発光体の各赤、緑及び青LEDに対応するフィルタ無しホトダイオードの出力信号を測定するステップと、
各赤、緑及び青LEDに対するフィルタ付きホトダイオードの出力信号をフィルタ無しホトダイオードの出力信号で割ることによってホトダイオードの出力信号比を計算するステップと、
前記ホトダイオードの出力信号比を利用して、各赤、緑及び青LEDに対する色度座標を決定するステップと、
各赤、緑及び青LEDに対する順方向電流を調整して、所望する色の光を発生するステップと、
を具えたことを特徴とするLED発光体の制御方法。 - 各赤、緑及び青LEDに対する前記色度座標を、各赤、緑及び青LEDに対するホトダイオードの出力信号比と色度座標との関係を含むルック−アップテーブルにアクセスすることによって決定することを特徴とする請求項11に記載のLED発光体の制御方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/083,329 US6630801B2 (en) | 2001-10-22 | 2001-10-22 | Method and apparatus for sensing the color point of an RGB LED white luminary using photodiodes |
PCT/IB2002/004296 WO2003037042A1 (en) | 2001-10-22 | 2002-10-16 | Led control apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005507546A JP2005507546A (ja) | 2005-03-17 |
JP4152885B2 true JP4152885B2 (ja) | 2008-09-17 |
Family
ID=22177614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2003539396A Expired - Fee Related JP4152885B2 (ja) | 2001-10-22 | 2002-10-16 | Led制御装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US6630801B2 (ja) |
EP (1) | EP1440604B1 (ja) |
JP (1) | JP4152885B2 (ja) |
CN (1) | CN100490595C (ja) |
AT (1) | ATE359689T1 (ja) |
DE (1) | DE60219504T2 (ja) |
WO (1) | WO2003037042A1 (ja) |
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- 2002-10-16 CN CNB028208730A patent/CN100490595C/zh not_active Expired - Fee Related
- 2002-10-16 WO PCT/IB2002/004296 patent/WO2003037042A1/en active IP Right Grant
- 2002-10-16 DE DE60219504T patent/DE60219504T2/de not_active Expired - Lifetime
- 2002-10-16 EP EP02775101A patent/EP1440604B1/en not_active Expired - Lifetime
- 2002-10-16 AT AT02775101T patent/ATE359689T1/de not_active IP Right Cessation
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US8921102B2 (en) | 2005-07-29 | 2014-12-30 | Gpb Scientific, Llc | Devices and methods for enrichment and alteration of circulating tumor cells and other particles |
US8647861B2 (en) | 2008-07-16 | 2014-02-11 | Children's Medical Center Corporation | Organ mimic device with microchannels and methods of use and manufacturing thereof |
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US10954482B2 (en) | 2011-12-09 | 2021-03-23 | President And Fellows Of Harvard College | Integrated human organ-on-chip microphysiological systems |
US11773359B2 (en) | 2011-12-09 | 2023-10-03 | President And Fellows Of Harvard College | Integrated human organ-on-chip microphysiological systems |
Also Published As
Publication number | Publication date |
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DE60219504T2 (de) | 2008-01-10 |
CN100490595C (zh) | 2009-05-20 |
EP1440604A1 (en) | 2004-07-28 |
CN1575623A (zh) | 2005-02-02 |
DE60219504D1 (de) | 2007-05-24 |
JP2005507546A (ja) | 2005-03-17 |
US20030076056A1 (en) | 2003-04-24 |
US6630801B2 (en) | 2003-10-07 |
EP1440604B1 (en) | 2007-04-11 |
WO2003037042A1 (en) | 2003-05-01 |
ATE359689T1 (de) | 2007-05-15 |
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