WO2012061454A3 - Duty factor probing of a triac-based dimmer - Google Patents
Duty factor probing of a triac-based dimmer Download PDFInfo
- Publication number
- WO2012061454A3 WO2012061454A3 PCT/US2011/058884 US2011058884W WO2012061454A3 WO 2012061454 A3 WO2012061454 A3 WO 2012061454A3 US 2011058884 W US2011058884 W US 2011058884W WO 2012061454 A3 WO2012061454 A3 WO 2012061454A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dimmer
- probing
- output
- duty factor
- time
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
-
- 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]
- H05B45/375—Switched mode power supply [SMPS] using buck topology
-
- 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]
- H05B45/385—Switched mode power supply [SMPS] using flyback topology
-
- 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]
Abstract
A power supply circuit for operating high-efficiency lighting devices from a thyristor- controlled dimmer determines the dimming value, i.e., the duty factor of the output of the dimmer by periodically probing the output of the dimmer. A minimum conductance is applied across the output of the dimmer during probing intervals that begin at the turn-on time of the dimmer and last until enough information has been gathered to correctly predict a next zero crossing of the AC line voltage that supplies the input of the dimmer. The dimming value is determined from the time interval between the predicted zero-crossing and a next turn-on time of the dimmer. The probing can be performed at intervals of an odd number of half-cycles of the AC line frequency so that a DC offset is not introduced within internal timing circuits of the dimmer. The AC line frequency can also be determined from a time interval between the predicted zero crossings.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11781723.9A EP2636135B1 (en) | 2010-11-04 | 2011-11-02 | Duty factor probing of a triac-based dimmer |
CN201180053471.3A CN103190062B (en) | 2010-11-04 | 2011-11-02 | Duty factor based on triac dimmable device detects |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US41026910P | 2010-11-04 | 2010-11-04 | |
US61/410,269 | 2010-11-04 | ||
US13/194,531 | 2011-07-29 | ||
US13/194,531 US8716957B2 (en) | 2010-07-30 | 2011-07-29 | Powering high-efficiency lighting devices from a triac-based dimmer |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2012061454A2 WO2012061454A2 (en) | 2012-05-10 |
WO2012061454A3 true WO2012061454A3 (en) | 2012-08-23 |
Family
ID=44983739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2011/058884 WO2012061454A2 (en) | 2010-11-04 | 2011-11-02 | Duty factor probing of a triac-based dimmer |
Country Status (4)
Country | Link |
---|---|
US (2) | US8941316B2 (en) |
EP (2) | EP2636135B1 (en) |
CN (1) | CN103190062B (en) |
WO (1) | WO2012061454A2 (en) |
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- 2011-11-02 EP EP11781723.9A patent/EP2636135B1/en not_active Not-in-force
- 2011-11-02 EP EP20140156490 patent/EP2741586A1/en not_active Withdrawn
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Also Published As
Publication number | Publication date |
---|---|
EP2636135B1 (en) | 2017-01-11 |
US20150084535A1 (en) | 2015-03-26 |
EP2741586A1 (en) | 2014-06-11 |
US9504111B2 (en) | 2016-11-22 |
CN103190062A (en) | 2013-07-03 |
WO2012061454A2 (en) | 2012-05-10 |
US8941316B2 (en) | 2015-01-27 |
EP2636135A2 (en) | 2013-09-11 |
CN103190062B (en) | 2016-08-31 |
US20120112651A1 (en) | 2012-05-10 |
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