CA2032057A1 - Circuit and method for improved dimming of gas discharge lamps - Google Patents
Circuit and method for improved dimming of gas discharge lampsInfo
- Publication number
- CA2032057A1 CA2032057A1 CA002032057A CA2032057A CA2032057A1 CA 2032057 A1 CA2032057 A1 CA 2032057A1 CA 002032057 A CA002032057 A CA 002032057A CA 2032057 A CA2032057 A CA 2032057A CA 2032057 A1 CA2032057 A1 CA 2032057A1
- Authority
- CA
- Canada
- Prior art keywords
- circuit
- gas discharge
- discharge lamps
- lamp
- providing
- 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.)
- Granted
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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
- H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
-
- 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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
- H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
- H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
- H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2858—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
-
- 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
Landscapes
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
A control system for providing electrical power from a source to at least one gas discharge lamp comprises a circuit for providing to the lamp an ac component of current at a first frequency and a circuit for simulta-neously providing to the lamp an ac component of current at a second, and substantially lower, frequency. There is established a composite current waveform in the lamp which substantially eliminates the occurrence of visible stria-tions.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US553,201 | 1990-07-13 | ||
US07/553,201 US5041763A (en) | 1989-12-22 | 1990-07-13 | Circuit and method for improved dimming of gas discharge lamps |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2032057A1 true CA2032057A1 (en) | 1992-01-14 |
CA2032057C CA2032057C (en) | 2001-04-17 |
Family
ID=24208510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002032057A Expired - Lifetime CA2032057C (en) | 1990-07-13 | 1990-12-12 | Circuit and method for improved dimming of gas discharge lamps |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2727476B2 (en) |
CA (1) | CA2032057C (en) |
DE (1) | DE4039498B4 (en) |
GB (1) | GB2246034B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2269279A (en) * | 1992-08-01 | 1994-02-02 | Coolite Ltd | Fluorescent Tube Starting and Operating Circuit |
JP3543236B2 (en) * | 1995-03-06 | 2004-07-14 | 株式会社キジマ | Push-pull inverter |
EP0765107B1 (en) * | 1995-09-25 | 2001-12-19 | Koninklijke Philips Electronics N.V. | circuit arrangement for avoiding striations |
TW381409B (en) * | 1996-03-14 | 2000-02-01 | Mitsubishi Electric Corp | Discharging lamp lighting device |
FI101188B (en) * | 1997-01-03 | 1998-04-30 | Helvar Oy | Electronic connector for discharge lamp equipped with lamp power measurement by means of DC signal |
GB0330019D0 (en) * | 2003-12-24 | 2004-01-28 | Powell David J | Apparatus and method for controlling discharge lights |
JP2010218963A (en) | 2009-03-18 | 2010-09-30 | Panasonic Electric Works Co Ltd | Low-pressure discharge lamp lighting device and lighting apparatus using the same |
US8167676B2 (en) | 2009-06-19 | 2012-05-01 | Vaxo Technologies, Llc | Fluorescent lighting system |
DE102010063867A1 (en) * | 2010-12-22 | 2012-06-28 | Tridonic Gmbh & Co Kg | Ignition control and ignition detection of gas discharge lamps |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB543136A (en) * | 1940-11-19 | 1942-02-11 | Smith & Sons Ltd S | Improvements in electric lighting apparatus |
US3603841A (en) * | 1968-03-01 | 1971-09-07 | Matsushita Electronics Corp | Fluorescent lamp device with luminosity control |
GB1568310A (en) * | 1976-12-13 | 1980-05-29 | Kuroi Kosan Kk | Discharge lamp lighting devices |
US4158793A (en) * | 1977-07-11 | 1979-06-19 | Lewis Gary D | Gas discharge lamp control circuit |
FR2416617A1 (en) * | 1978-02-07 | 1979-08-31 | Signaux Entr Electriques | CONVERTER FOR THE POWER SUPPLY OF DISCHARGE LAMPS, AND MORE GENERALLY OF ARC LAMPS, AND ITS APPLICATION TO PROJECTORS FOR SUCH LAMPS |
US4415839A (en) * | 1981-11-23 | 1983-11-15 | Lesea Ronald A | Electronic ballast for gaseous discharge lamps |
FI65524C (en) * | 1982-04-21 | 1984-05-10 | Helvar Oy | FOER REFRIGERATION FOER MATNING AVERAGE REQUIREMENTS FOR FLUORESCENT LAMPS |
US4535399A (en) * | 1983-06-03 | 1985-08-13 | National Semiconductor Corporation | Regulated switched power circuit with resonant load |
JP2625793B2 (en) * | 1987-12-28 | 1997-07-02 | 松下電器産業株式会社 | Fluorescent lighting device |
NL8800288A (en) * | 1988-02-08 | 1989-09-01 | Nedap Nv | BALLAST FOR A FLUORESCENT LAMP. |
US4916362A (en) * | 1988-04-05 | 1990-04-10 | Neon Dynamics Corporation | Excitation supply for gas discharge tubes |
US5144205A (en) * | 1989-05-18 | 1992-09-01 | Lutron Electronics Co., Inc. | Compact fluorescent lamp dimming system |
US5001386B1 (en) * | 1989-12-22 | 1996-10-15 | Lutron Electronics Co | Circuit for dimming gas discharge lamps without introducing striations |
-
1990
- 1990-12-11 DE DE4039498A patent/DE4039498B4/en not_active Expired - Lifetime
- 1990-12-12 GB GB9026931A patent/GB2246034B/en not_active Expired - Lifetime
- 1990-12-12 CA CA002032057A patent/CA2032057C/en not_active Expired - Lifetime
- 1990-12-12 JP JP2410493A patent/JP2727476B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB2246034B (en) | 1994-12-14 |
JP2727476B2 (en) | 1998-03-11 |
JPH06302393A (en) | 1994-10-28 |
DE4039498B4 (en) | 2006-06-29 |
GB2246034A (en) | 1992-01-15 |
CA2032057C (en) | 2001-04-17 |
DE4039498A1 (en) | 1992-01-16 |
GB9026931D0 (en) | 1991-01-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |