WO2003069958A1 - Switching device for driving a led array - Google Patents
Switching device for driving a led array Download PDFInfo
- Publication number
- WO2003069958A1 WO2003069958A1 PCT/IB2003/000418 IB0300418W WO03069958A1 WO 2003069958 A1 WO2003069958 A1 WO 2003069958A1 IB 0300418 W IB0300418 W IB 0300418W WO 03069958 A1 WO03069958 A1 WO 03069958A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- modulation
- pulse
- led array
- switching device
- current
- Prior art date
Links
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]
- H05B45/10—Controlling the intensity of the light
- H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- 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
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
-
- 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
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
- G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
- G09G3/14—Semiconductor devices, e.g. diodes
-
- 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
- H05B45/305—Frequency-control circuits
-
- 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
- H05B45/32—Pulse-control circuits
- H05B45/33—Pulse-amplitude modulation [PAM]
-
- 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
- H05B45/32—Pulse-control circuits
- H05B45/335—Pulse-frequency modulation [PFM]
-
- 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]
Definitions
- the invention relates to a switching device for driving a LED array.
- WO 0020691 has disclosed a LED array serving as road marking.
- the brightness of the relevant road marking as perceived by the traffic participant is considerably influenced by the local circumstances such as, for example, the time of day and prevailing weather conditions.
- the perceived brightness is to be sufficiently great for a proper observance of the marking and, on the other hand, this brightness should remain limited to avoid a traffic participant's attention being distracted too much from other observations which are of importance for safe traffic handling, or to avoid dazzling.
- a switching device for driving a LED array comprises means for driving a LED array with a pulse-shaped current of mean strength and for regulating the mean strength of the current flowing through the LED array by means of at least one of the following types of modulation: frequency modulation, pulse- width modulation, and amplitude modulation of the pulse-shaped current. Regulation is preferably effected with a combination of two types of modulation of the pulse-shaped current.
- pulse-shaped current regulation is highly advantageous because pulse-shaped regulation can be realized by modern electronic power supply circuits in a relatively simple way.
- an extraordinarily wide control range for the mean current strength is realized.
- the brightness of the marking formed by the LED array can be adapted well to the locally prevailing circumstances, which circumstances may be subject to major changes.
- the control range may be advantageously increased by a combination of the three types of modulation.
- a suitable form of controlling the brightness through regulation of the mean current flowing through the LED array is based on a regulation by means of pulse- width modulation for a current strength in a range between a mean nominal current Inom and 0.05 Inom, with amplitude modulation superimposed thereon so as to regulate the mean current strength in a range from 0.05 Inom to 0.05*10 " Inom.
- the switching device as shown in the drawing has an input JP1 for connection to a supply source.
- the general property of LEDs that there is only a small forward voltage across the LED in operating condition means that a low-voltage supply source may be used.
- An output JP2 is suitable for connecting the LED array to be operated.
- a series combination of a LED D2 and a resistor R9 is connected in parallel to the output.
- a semiconductor switching element Q3 in parallel to the output and the series combination is present, a main electrode EQ3 of which element is connected to a main electrode EQ2 of a semiconductor switch Q2 which is connected between input and output.
- a control electrode GQ2 of semiconductor switch Q2 is connected to a control electrode GQ3 of the semiconductor switching element Q3 and to a shared control circuit.
- the control electrodes GQ2 and GQ3 are connected to a center tap 2 of a potentiometer R10, which is connected in series with a transistor Ql. The position of the center tap 2 of the potentiometer R10 determines the degree of current conduction through the semiconductor switch Q2 and the semiconductor switching element Q3.
- potentiometer R10 and transistor Ql constitutes an output of a pulse-width modulator formed around an opamp U2B.
- An output 7 of opamp U2B is connected to a base of transistor Ql .
- Input 5 of the opamp U2B is connected to a capacitor C5, which is part of an oscillator, and input 6 of opamp U2B is connected to a variable voltage divider R7, R6, R5.
- the time per cycle of the oscillator frequency during which the signal at output 7 turns transistor Ql on or off respectively, can be varied by means of the variable voltage divider, so that the pulse width of the current pulse is varied by the semiconductor switch Q2.
- Capacitor C5 and opamp U2 A form part of an oscillation circuit in which the capacitor C5 together with impedances R4 and R12 constitutes a voltage divider circuit.
- R4 is herein an adjustable resistor, which achieves that the frequency generated by the oscillation circuit can be adjusted and can therefore be varied. In consequence, the current pulse frequency will vary accordingly.
- the opamps U2A and U2B are constituted by a single ic of the type TS393CN.
- Transistor Ql is of the type BC548C, semiconductor switch Q2 of the type BC639, and semiconductor switching element Q3 of the type BC640.
- the oscillator circuit has a default frequency of 200Hz.
- Potentiometer RIO has a strength of 4.7k ⁇ and has a 100% control range.
- the switching device is intended to be connected to a 15V DC supply source.
- the switching device drives a LED array for road marking, which LED array comprises a total of 400LEDs of the type Nichia NSPW300BS. In nominal condition the supply is effected such that the mean current flowing through each LED of the array is 20mA.
- Brightness control down to a level corresponding to an mean current through each LED of 1mA takes place exclusively by varying the voltage divider R7, R6, R5.
- the pulse width is then modulated to a 2% duty cycle.
- the setting of the potentiometer R10 is varied.
- the mean current flowing through each LED can be reduced to l ⁇ A.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/504,139 US7463070B2 (en) | 2002-02-14 | 2003-02-06 | Switching device for driving LED array by pulse-shaped current modulation |
AU2003201751A AU2003201751A1 (en) | 2002-02-14 | 2003-02-06 | Switching device for driving a led array |
DE60306624T DE60306624T2 (en) | 2002-02-14 | 2003-02-06 | CIRCUIT TO CONTROL A LIGHTING DIODE FIELD |
EP03700452A EP1479270B1 (en) | 2002-02-14 | 2003-02-06 | Switching device for driving a led array |
KR1020047012496A KR100960825B1 (en) | 2002-02-14 | 2003-02-06 | Switching device for driving a led array |
JP2003568937A JP4633363B2 (en) | 2002-02-14 | 2003-02-06 | LED array driving switching device |
US12/265,354 US20090072761A1 (en) | 2002-02-14 | 2008-11-05 | Switching device for driving led array by pulse-shaped current modulation |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02075627.6 | 2002-02-14 | ||
EP02075627 | 2002-02-14 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/265,354 Continuation US20090072761A1 (en) | 2002-02-14 | 2008-11-05 | Switching device for driving led array by pulse-shaped current modulation |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003069958A1 true WO2003069958A1 (en) | 2003-08-21 |
Family
ID=27675721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2003/000418 WO2003069958A1 (en) | 2002-02-14 | 2003-02-06 | Switching device for driving a led array |
Country Status (10)
Country | Link |
---|---|
US (2) | US7463070B2 (en) |
EP (1) | EP1479270B1 (en) |
JP (1) | JP4633363B2 (en) |
KR (1) | KR100960825B1 (en) |
CN (1) | CN100477868C (en) |
AT (1) | ATE332622T1 (en) |
AU (1) | AU2003201751A1 (en) |
DE (1) | DE60306624T2 (en) |
TW (1) | TWI279764B (en) |
WO (1) | WO2003069958A1 (en) |
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---|---|---|---|---|
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EP1734793A1 (en) * | 2005-06-14 | 2006-12-20 | Novaled AG | Method and device for operating an OLED device |
WO2008006450A1 (en) * | 2006-07-11 | 2008-01-17 | Austriamicrosystems Ag | Control circuit and method for controlling leds |
US7542257B2 (en) | 2004-09-10 | 2009-06-02 | Philips Solid-State Lighting Solutions, Inc. | Power control methods and apparatus for variable loads |
DE102004004319B4 (en) * | 2003-01-31 | 2009-07-16 | Anden Co., Ltd., Anjo | Control device for a light-emitting diode |
EP2088833A1 (en) * | 2008-02-08 | 2009-08-12 | Audi AG | Method for operating a motor vehicle Led-lighting device |
CN1760721B (en) * | 2004-10-14 | 2010-05-05 | 索尼株式会社 | Light emitting element drive device and display system |
US8994615B2 (en) | 2008-06-06 | 2015-03-31 | Dolby Laboratories Licensing Corporation | Apparatus and methods for driving solid-state illumination sources |
US9112175B2 (en) | 2005-12-21 | 2015-08-18 | Novaled Ag | Organic component |
EP3089560A1 (en) * | 2015-04-28 | 2016-11-02 | Zumtobel Lighting GmbH | Operating device for operating at least one led and arrangement for illuminating with an operational device and at least one led |
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---|---|---|---|---|
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US7766511B2 (en) | 2006-04-24 | 2010-08-03 | Integrated Illumination Systems | LED light fixture |
US7746300B2 (en) * | 2006-05-05 | 2010-06-29 | Linear Technology Corporation | Circuit and methodology for supplying pulsed current to a load, such as a light emitting diode |
US7729941B2 (en) | 2006-11-17 | 2010-06-01 | Integrated Illumination Systems, Inc. | Apparatus and method of using lighting systems to enhance brand recognition |
US8013538B2 (en) | 2007-01-26 | 2011-09-06 | Integrated Illumination Systems, Inc. | TRI-light |
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US8118447B2 (en) | 2007-12-20 | 2012-02-21 | Altair Engineering, Inc. | LED lighting apparatus with swivel connection |
US7712918B2 (en) | 2007-12-21 | 2010-05-11 | Altair Engineering , Inc. | Light distribution using a light emitting diode assembly |
US8255487B2 (en) | 2008-05-16 | 2012-08-28 | Integrated Illumination Systems, Inc. | Systems and methods for communicating in a lighting network |
US8360599B2 (en) | 2008-05-23 | 2013-01-29 | Ilumisys, Inc. | Electric shock resistant L.E.D. based light |
US7976196B2 (en) | 2008-07-09 | 2011-07-12 | Altair Engineering, Inc. | Method of forming LED-based light and resulting LED-based light |
US7946729B2 (en) | 2008-07-31 | 2011-05-24 | Altair Engineering, Inc. | Fluorescent tube replacement having longitudinally oriented LEDs |
US8674626B2 (en) | 2008-09-02 | 2014-03-18 | Ilumisys, Inc. | LED lamp failure alerting system |
US8256924B2 (en) | 2008-09-15 | 2012-09-04 | Ilumisys, Inc. | LED-based light having rapidly oscillating LEDs |
US8214084B2 (en) | 2008-10-24 | 2012-07-03 | Ilumisys, Inc. | Integration of LED lighting with building controls |
US8444292B2 (en) | 2008-10-24 | 2013-05-21 | Ilumisys, Inc. | End cap substitute for LED-based tube replacement light |
US8324817B2 (en) | 2008-10-24 | 2012-12-04 | Ilumisys, Inc. | Light and light sensor |
US8901823B2 (en) | 2008-10-24 | 2014-12-02 | Ilumisys, Inc. | Light and light sensor |
US7938562B2 (en) | 2008-10-24 | 2011-05-10 | Altair Engineering, Inc. | Lighting including integral communication apparatus |
US8653984B2 (en) | 2008-10-24 | 2014-02-18 | Ilumisys, Inc. | Integration of LED lighting control with emergency notification systems |
US8556452B2 (en) | 2009-01-15 | 2013-10-15 | Ilumisys, Inc. | LED lens |
US8362710B2 (en) | 2009-01-21 | 2013-01-29 | Ilumisys, Inc. | Direct AC-to-DC converter for passive component minimization and universal operation of LED arrays |
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US8585245B2 (en) | 2009-04-23 | 2013-11-19 | Integrated Illumination Systems, Inc. | Systems and methods for sealing a lighting fixture |
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US8299695B2 (en) | 2009-06-02 | 2012-10-30 | Ilumisys, Inc. | Screw-in LED bulb comprising a base having outwardly projecting nodes |
US8421366B2 (en) | 2009-06-23 | 2013-04-16 | Ilumisys, Inc. | Illumination device including LEDs and a switching power control system |
DE102009040283A1 (en) * | 2009-09-04 | 2011-03-10 | Tridonic Ag | Operation of pulse modulated LEDs |
US8492988B2 (en) | 2009-10-07 | 2013-07-23 | Lutron Electronics Co., Inc. | Configurable load control device for light-emitting diode light sources |
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WO2011119958A1 (en) | 2010-03-26 | 2011-09-29 | Altair Engineering, Inc. | Inside-out led bulb |
CA2794512A1 (en) | 2010-03-26 | 2011-09-29 | David L. Simon | Led light tube with dual sided light distribution |
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US8523394B2 (en) | 2010-10-29 | 2013-09-03 | Ilumisys, Inc. | Mechanisms for reducing risk of shock during installation of light tube |
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4313227A (en) * | 1979-01-29 | 1982-01-26 | Texas Instruments Incorporated | Light energy information transmission system |
EP0553867A2 (en) * | 1992-01-30 | 1993-08-04 | Fujitsu Limited | Drive circuit for electronic device |
EP0625843A1 (en) * | 1993-05-17 | 1994-11-23 | Eastman Kodak Company | A laser diode operated in hybrid modulation modes |
US5671003A (en) * | 1991-11-04 | 1997-09-23 | Eastman Kodak Company | Hybrid digital image printer with halftone gray scale capability |
US5736881A (en) * | 1994-12-05 | 1998-04-07 | Hughes Electronics | Diode drive current source |
DE19732828A1 (en) * | 1997-07-30 | 1999-02-04 | Siemens Ag | PWM address circuit for light-emitting diode array |
WO1999056303A1 (en) * | 1997-01-10 | 1999-11-04 | Hochstein Peter A | Maintaining led luminous intensity |
WO2001073818A1 (en) * | 2000-03-31 | 2001-10-04 | Hong Sam Pyo | Light emitting lamp |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3998043A (en) * | 1973-12-26 | 1976-12-21 | Citizen Watch Co., Ltd. | Electric timepiece for displaying the operating condition thereof |
JPH0777424A (en) * | 1993-09-07 | 1995-03-20 | Wacom Co Ltd | Optical surveying instrument |
ATE338169T1 (en) | 1999-05-20 | 2006-09-15 | Koninkl Philips Electronics Nv | ROAD MARKING APPARATUS AND METHOD |
US6333605B1 (en) * | 1999-11-02 | 2001-12-25 | Energy Savings, Inc. | Light modulating electronic ballast |
CN1201636C (en) | 2000-02-03 | 2005-05-11 | 皇家菲利浦电子有限公司 | Supply assembly for LED lighting module |
US7202613B2 (en) * | 2001-05-30 | 2007-04-10 | Color Kinetics Incorporated | Controlled lighting methods and apparatus |
US7071762B2 (en) * | 2001-01-31 | 2006-07-04 | Koninklijke Philips Electronics N.V. | Supply assembly for a led lighting module |
US6388398B1 (en) * | 2001-03-20 | 2002-05-14 | Koninklijke Philips Electronics N.V. | Mixed mode control for ballast circuit |
US6696800B2 (en) * | 2002-01-10 | 2004-02-24 | Koninklijke Philips Electronics N.V. | High frequency electronic ballast |
US6686703B2 (en) | 2002-01-10 | 2004-02-03 | Koninklijke Philips Electronics N.V. | High frequency electronic ballast |
-
2003
- 2003-02-06 JP JP2003568937A patent/JP4633363B2/en not_active Expired - Lifetime
- 2003-02-06 AU AU2003201751A patent/AU2003201751A1/en not_active Abandoned
- 2003-02-06 AT AT03700452T patent/ATE332622T1/en not_active IP Right Cessation
- 2003-02-06 KR KR1020047012496A patent/KR100960825B1/en active IP Right Grant
- 2003-02-06 CN CNB038038781A patent/CN100477868C/en not_active Expired - Lifetime
- 2003-02-06 EP EP03700452A patent/EP1479270B1/en not_active Expired - Lifetime
- 2003-02-06 US US10/504,139 patent/US7463070B2/en not_active Expired - Lifetime
- 2003-02-06 WO PCT/IB2003/000418 patent/WO2003069958A1/en active IP Right Grant
- 2003-02-06 DE DE60306624T patent/DE60306624T2/en not_active Expired - Lifetime
- 2003-02-11 TW TW092102751A patent/TWI279764B/en not_active IP Right Cessation
-
2008
- 2008-11-05 US US12/265,354 patent/US20090072761A1/en not_active Abandoned
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4313227A (en) * | 1979-01-29 | 1982-01-26 | Texas Instruments Incorporated | Light energy information transmission system |
US5671003A (en) * | 1991-11-04 | 1997-09-23 | Eastman Kodak Company | Hybrid digital image printer with halftone gray scale capability |
EP0553867A2 (en) * | 1992-01-30 | 1993-08-04 | Fujitsu Limited | Drive circuit for electronic device |
EP0625843A1 (en) * | 1993-05-17 | 1994-11-23 | Eastman Kodak Company | A laser diode operated in hybrid modulation modes |
US5736881A (en) * | 1994-12-05 | 1998-04-07 | Hughes Electronics | Diode drive current source |
WO1999056303A1 (en) * | 1997-01-10 | 1999-11-04 | Hochstein Peter A | Maintaining led luminous intensity |
DE19732828A1 (en) * | 1997-07-30 | 1999-02-04 | Siemens Ag | PWM address circuit for light-emitting diode array |
WO2001073818A1 (en) * | 2000-03-31 | 2001-10-04 | Hong Sam Pyo | Light emitting lamp |
Cited By (13)
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DE102004004319B8 (en) * | 2003-01-31 | 2009-11-05 | Anden Co., Ltd., Anjo | Control device for a light-emitting diode |
DE102004004319B4 (en) * | 2003-01-31 | 2009-07-16 | Anden Co., Ltd., Anjo | Control device for a light-emitting diode |
DE102004010942B3 (en) * | 2004-03-05 | 2005-10-13 | Kwl-Lighting Gmbh | Control device and control process for the control of luminaries features an electrical circuit that reduces the perception of the brightness change |
US7542257B2 (en) | 2004-09-10 | 2009-06-02 | Philips Solid-State Lighting Solutions, Inc. | Power control methods and apparatus for variable loads |
CN1760721B (en) * | 2004-10-14 | 2010-05-05 | 索尼株式会社 | Light emitting element drive device and display system |
EP1734793A1 (en) * | 2005-06-14 | 2006-12-20 | Novaled AG | Method and device for operating an OLED device |
US9112175B2 (en) | 2005-12-21 | 2015-08-18 | Novaled Ag | Organic component |
US8098028B2 (en) | 2006-07-11 | 2012-01-17 | Austriamicrosystems Ag | Control circuit and method for controlling LEDs |
GB2452210A (en) * | 2006-07-11 | 2009-02-25 | Austriamicrosystems Ag | Control circuit and method for controlling LEDs |
WO2008006450A1 (en) * | 2006-07-11 | 2008-01-17 | Austriamicrosystems Ag | Control circuit and method for controlling leds |
EP2088833A1 (en) * | 2008-02-08 | 2009-08-12 | Audi AG | Method for operating a motor vehicle Led-lighting device |
US8994615B2 (en) | 2008-06-06 | 2015-03-31 | Dolby Laboratories Licensing Corporation | Apparatus and methods for driving solid-state illumination sources |
EP3089560A1 (en) * | 2015-04-28 | 2016-11-02 | Zumtobel Lighting GmbH | Operating device for operating at least one led and arrangement for illuminating with an operational device and at least one led |
Also Published As
Publication number | Publication date |
---|---|
JP2005518102A (en) | 2005-06-16 |
KR20040096566A (en) | 2004-11-16 |
CN100477868C (en) | 2009-04-08 |
US20050088209A1 (en) | 2005-04-28 |
EP1479270B1 (en) | 2006-07-05 |
JP4633363B2 (en) | 2011-02-16 |
TWI279764B (en) | 2007-04-21 |
EP1479270A1 (en) | 2004-11-24 |
DE60306624D1 (en) | 2006-08-17 |
ATE332622T1 (en) | 2006-07-15 |
AU2003201751A1 (en) | 2003-09-04 |
CN1633827A (en) | 2005-06-29 |
KR100960825B1 (en) | 2010-06-07 |
TW200303512A (en) | 2003-09-01 |
DE60306624T2 (en) | 2007-06-21 |
US7463070B2 (en) | 2008-12-09 |
US20090072761A1 (en) | 2009-03-19 |
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