WO2000025554A2 - Verfahren und vorschaltgerät zum betrieb einer mit einer leuchtstofflampe versehenen leuchte - Google Patents
Verfahren und vorschaltgerät zum betrieb einer mit einer leuchtstofflampe versehenen leuchte Download PDFInfo
- Publication number
- WO2000025554A2 WO2000025554A2 PCT/DE1999/003422 DE9903422W WO0025554A2 WO 2000025554 A2 WO2000025554 A2 WO 2000025554A2 DE 9903422 W DE9903422 W DE 9903422W WO 0025554 A2 WO0025554 A2 WO 0025554A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lamp
- preheating
- current
- phase
- voltage
- 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
- 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
- H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
-
- 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
Definitions
- the invention relates to a method and a ballast for operating a lamp provided with a fluorescent lamp.
- One of the ballasts according to EP 0 889 675 AI provides for a preheating phase of the electrodes. It is a ballast for warm-start fluorescent lamps.
- the electrodes protruding into the interior of the tube at the ends of the discharge tube of the fluorescent lamp are preheated.
- the electrodes provided with an emitter material expel ions, as a result of which the gas filling contained in the discharge tube becomes electrically conductive.
- the so-called discharge path of the fluorescent lamp is ignited only after this preheating phase. This procedure protects the electrodes.
- the electrode resistance of the fluorescent lamp is measured in order to draw indirect conclusions about the electrode temperature and to carry out the preheating gently.
- the lamp type of the fluorescent lamp is to be concluded using the measured electrode resistance.
- the fluorescent lamp is initially supplied with a low current and the electrode temperature is measured indirectly. If the initial current is not sufficient to heat the electrodes to an expected temperature, the current is increased in stages until the electrode resistance repectively reaches the expected electrode temperature.
- the electrode resistance is not a clear criterion for distinguishing the lamp types. Optimal operating conditions can only be set with the known ballast if the lamp types to be recognized are only those whose electrode resistances differ significantly.
- the simple method of measuring the lamp voltage is used to determine the lamp type of the fluorescent lamp instead of the more complex measurement of the electrode resistance. Since the temperature measurement to be carried out indirectly via the electrode resistance is saved, this construction uses the simple method of measuring the lamp voltage. Due to the lack of optimized preheating, the electrodes of the fluorescent lamp in this ballast are subject to increased wear. Furthermore, different lamp types, if they have the same or closely adjacent lamp voltages, cannot be clearly distinguished either. The setting of optimal operating conditions is only possible with this ballast if the lamp types to be recognized are those whose lamp voltages differ significantly.
- the invention is therefore based on the object of proposing a simple method and a ballast for carrying out the method, with which a large number of commercially available lamp types of fluorescent lamps can be operated with a higher degree of optimization.
- the object is achieved by a method for operating a luminaire provided with a fluorescent lamp, the operating data of certain recognizable lamp types at least their nominal lamp voltage, the nominal lamp current and preheating currents and preheating times for heating the electrodes being stored in a register, the preheating currents being predetermined areas of the electrode resistance assigned the electrode resistance is measured during a preheating phase and the preheating current and the assigned preheating time assigned to the measured electrode resistance are set, the fluorescent lamp is operated with a dimming current of known current intensity for a predetermined time within a start phase following the preheating phase, and the present lamp voltage of the fluorescent lamp after the start phase is measured, then that nominal lamp voltage that comes closest to the measured lamp voltage of the fluorescent lamp is searched for in the register, and then the operating data required for operating the fluorescent lamp are set, which are assigned to the measured lamp voltage by register.
- the lamp type recognition of the present invention is based on the principle of the lamp voltage measurement during the starting phase of the fluorescent lamp. In addition, however, there is knowledge of the electrode resistance which has been determined by the upstream preheating phase and which provides a further selection criterion for determining the exact lamp type. With the method according to the invention, an electrode-protecting warm start of the fluorescent lamp is thus carried out and, moreover, an exact determination of the lamp type is made possible.
- Operating data are not exclusively to be understood as parameters that are directly necessary for operating the fluorescent lamp. Operating data, such as maximum lamp voltages, currents, electrode resistances or temperatures, can also be stored which occur in irregular operating states, for example in order to bring about a safety shutdown if necessary.
- operating data such as for example the nominal lamp voltage and the nominal lamp current
- operating data can be stored directly in the register or alternatively can be stored in the form of other values which are correlatively linked to the operating data.
- the invention also includes the possibility of being able to change and set operating data of the fluorescent lamp directly, or to be able to set it indirectly by means of quantities linked to it by law.
- the dimming current and the lamp current for example, can be set by changing the alternating current frequency that is applied to the fluorescent lamp during operation.
- Short-term operation is to be understood as a predetermined operating time, which can be from a few seconds to a few minutes.
- the dimming current set at the start of the starting phase corresponds to the lowest nominal lamp current stored in the register or is greater than this. If it corresponds to the lowest of the stored nominal lamp currents, a fluorescent lamp with a low nominal lamp current cannot be overloaded even after long-term operation under these conditions. However, since the start-up phase only lasts a few seconds to minutes, even fluorescent lamps with a nominal lamp current that is lower than the dimming current do not fail.
- An optimized dimming current is advantageously set during the start-up phase, the current strength of which is sufficient for the operation of a fluorescent lamp whose nominal lamp current is higher than the optimized dimming current and a fluorescent lamp whose nominal lamp current is lower than the optimized dimming current is not destroyed.
- the optimized dimming current supplies enough energy to generate a sufficient light intensity.
- a dimming setting from a few seconds to a few minutes can be tolerated because sufficient brightness is already achieved.
- the preheating current being the Maintain the previous level and then the start phase is initiated.
- a NO decision triggers a further stage of the preheating phase, with the next higher preheating current stored in the register being set at the beginning of this stage and either the start phase being initiated after a predetermined time or a further YES / NO query being carried out which involves the same method steps as follow after the first YES / NO query.
- Each YES decision triggers a further stage of the preheating phase, whereby the preheating current of the previous preheating stage is maintained. Every NO decision triggers a further stage of the preheating phase with the next higher preheating current.
- the last YES / NO query provided in the process sequence if it is decided with NO, triggers an increase in the preheating current and then after a predetermined time the start phase without a renewed YES / NO query being carried out.
- a further improvement of the method is achieved if the stored operating data of the recognizable lamp types in the register are divided into lamp groups, only fluorescent lamps with different lamp nominal voltages being contained within a lamp group, so that each lamp group is assigned one of the areas of the electrode resistances and a preheating current by register That the determined electrode resistance or the last preheating current set during the preheating phase determines which lamp group the fluorescent lamp belongs to, that during the subsequent starting phase within the determined Lamp group of the register is searched for the lamp nominal voltage that comes closest to the measured lamp voltage of the fluorescent lamp, and then the operating data required for operating the fluorescent lamp are set, which are assigned to the measured lamp voltage by register.
- the standard fluorescent lamps on the market include electrodes with the same nominal voltages but different electrodes and electrode resistances. In the register according to the invention, however, these are assigned to different lamp groups, so that a clear assignment of the lamp type is possible within a lamp group on the basis of the measured lamp nominal voltage.
- the start-up phase can also be improved by grouping the recognizable lamp types into lamp groups.
- a dimming current is assigned to each lamp group in the register, the dimming current to be set for the start phase being determined during the preheating phase by determining the lamp group.
- the process sequence provides a three-stage preheating phase with two possible YES / NO queries, a NO decision of the second YES / NO query triggering the third stage of the preheating phase, the highest in the register compared to the previous stage of the preheating phase stored preheating current is set and the start phase is initiated after a predetermined time.
- the three-stage process sequence offers three predetermined preheating currents, which, starting with the lowest, can be increased in successive stages of the preheating phase.
- the three-stage process for preheating is an advantageous compromise with which the preheating of the large number of lamp types is possible in a sufficiently differentiated manner and the design effort for the ballast required is within an acceptable range.
- a maximum lamp voltage can be stored in the register for each lamp type. During the operation of the fluorescent lamp, it is then checked whether the lamp voltage currently in operation exceeds the maximum lamp voltage. If the maximum lamp voltage is exceeded, the fluorescent lamp is then switched off safely. The lamp voltage can be checked continuously, for example, or carried out at predetermined time intervals.
- a minimum lamp voltage can also be stored in the register and it can be checked whether the present lamp voltage falls below the minimum. If the level is undershot, the fluorescent lamp is switched off again.
- the stored maximum lamp voltage is advantageously above the highest of the lamp voltages stored in the register.
- different maximum lamp voltages can be stored for each individual lamp or for groups of lamp types.
- the start-up phase is carried out by actuating an ON / OFF switch assigned to the lamp or, expediently, initiated by inserting a fluorescent lamp into an empty lamp holder when the lamp is switched on. In this way it is prevented that a fluorescent lamp put into operation when the luminaire is switched on is operated with incorrect operating data.
- the invention further consists in a particularly simple embodiment of a ballast for carrying out the method according to the invention, with a frequency generator and a control circuit which interacts with it and which supplies the fluorescent lamp with an AC voltage via power transistors, the lamp current being adjustable by a limiter, a register , in which the operating data of several lamp types are registered, a sequence control which controls the timing of the procedural steps to be carried out during a starting phase of the fluorescent lamp, a measured value evaluator, a lamp voltage measuring device and a DC voltage generator with which a logic voltage can be generated.
- the lamp current can z. B. indirectly via the frequency of the AC voltage, by changing the DC voltage or by changing the value of the impedances.
- ballast is advantageous. Its design allows only the control circuit and the downstream power transistors to be supplied with high energy by the DC voltage generator in order to operate the fluorescent lamp.
- the ballast is provided with an electrode resistance measuring device.
- the sequence control can be used to control the timing of the method steps which are to be carried out during a preheating phase of the fluorescent lamp.
- the sequence control, the measured value evaluator, the register and the frequency generator are expediently arranged in a common control device, which is also referred to as a controller. is not.
- the DC voltage generator has a connection which supplies the parts of the ballast involved in the data processing with energy.
- the energy is tapped in the form of a regulated logic voltage which is significantly lower than the lamp voltage required to supply the lamp.
- the control device, the control circuit, the lamp voltage measuring device and the electrode resistance measuring device are supplied with a regulated direct voltage via the direct voltage generator. This is tapped as a so-called logic voltage at a separate connection of the DC voltage generator and is significantly lower than the lamp voltage required to supply the lamp.
- 1 is a schematic representation of the operating data of different lamp types of fluorescent lamps stored in a register
- FIG. 2 shows a flow diagram in which the determination of the lamp type during the starting phase of a fluorescent lamp is shown
- FIG. 3 shows a flow diagram with an n-stage preheating phase of a fluorescent lamp
- FIG. 5 shows a schematic circuit diagram of an embodiment of a ballast.
- the register R contains operating data for the lamp types TT 2 , ... T n _ ! and T n , which in the present exemplary embodiment are divided into lamp groups G lr G 2 ,... G n _, and G n .
- the register R also stores, for each lamp type, the nominal lamp current I L , the nominal lamp voltage U L , the electrode resistance R E , a preheating current I vorh and a maximum lamp voltage U max .
- These operating data are in the register R in accordance with the indexing of the lamp types T lf T 2 , ... n _ ! and T n also indexed with 1, 2, (n-1) and n.
- the method according to the invention initially provides a preheating phase V and a subsequent starting phase S. 2, the starting phase S is initially explained, during which the actual determination of the lamp type, namely by measuring the lamp voltage, takes place.
- the preheating phase V which precedes the start phase S in the course of the method, is described with reference to FIG. 3.
- the sequence diagram K of the method for operating a fluorescent lamp begins with the start phase S.
- the simplified sequence diagram K follows the four exemplary courses of the preheating phase.
- a dimming position is set according to the exemplary embodiment according to FIG. 2, during which a predetermined, optimized dimming current I Do flows for a predetermined time.
- the predetermined dimming current I Do already corresponds to that registered lamp nominal current I L2 .
- Fluorescent lamps of the lamp type T 2 are therefore operated under optimal conditions from the start of the start phase S. Fluorescent lamps with a lower nominal lamp current are overloaded to a small but tolerable degree. Fluorescent lamps with a higher nominal lamp current can be operated safely with the optimized dimming current I Do , so that sufficient brightness is already achieved during this dimming position.
- the actual lamp voltage U L of the fluorescent lamp in operation is measured.
- the lamp type is not among all lamp types T lf T 2 , ... T n _ stored in the register ! and T n are determined, but only within the lamp group G ⁇ r G 2 ,... G n _ x and G n of the register R which was already determined during the preheating phase V by measuring the electrode resistance. Under the lamp types of a lamp group, confusion with other lamp types with the same nominal lamp voltage is excluded.
- the operating phase B is ended according to FIG. 2 by a regular switch-off process.
- Figures 3 and 4 illustrate the sequence of a fluorescent lamp started with preheating.
- 3 shows a flow diagram with an n-stage preheating phase of a fluorescent lamp.
- the levels are VV 2 , ... V in . ⁇ ) and V n of the preheating phase.
- the lowest preheating current I stored in register R is set.
- the preheating phase is checked with a first YES / NO query & whether the electrode resistance R E in the predetermined range (R E> X) falls, and at a YES decision, a further stage V 2 of the preheating phase triggered, the preheating current I maintain the previous stage V j and then the start phase S is initiated.
- the YES / NO query A 2 is followed by the same method steps as the YES / NO query A :. If the decision is YES, a further stage of the preheating phase is triggered, the preheating current I vorh2 of the previous stage V 2 being maintained and the starting phase S then being initiated.
- a NO decision triggers a further stage of the preheating phase, not shown, at the beginning of this stage the next higher preheating current stored in the register R and either starting the start phase S after a predetermined time or a further YES / NO query (not shown) ) is carried out.
- Referring to FIG. 3 follows a penultimate stage V (n _ 1 ⁇ of the preheating phase, a YES / NO query A n according to the is checked.
- a three-stage preheating phase with two possible YES / NO inquiries A x and A 2 is provided.
- a NO decision of the second YES / NO query A 2 triggers the third stage V 3 of the preheating phase.
- the highest preheating current I vorh3 stored in the register R is set and the start phase S is initiated immediately after a predetermined time without carrying out another YES / NO query.
- FIG. 5 shows a ballast 1 for operating a lamp 3 provided with a fluorescent lamp 2, which is suitable both for performing a warm start and for performing a cold start.
- the ballast 1 has a control device 4, also referred to as a controller. This is provided with a sequence control 5, a measured value evaluator 6, a data memory designated as register 7 and a frequency generator 8. The operating data of several lamp types are registered in register 7 of control device 4.
- the sequence controller 5 controls the timing of the method steps to be carried out during the starting phase of the fluorescent lamp 2.
- the sequence control 5 can be used to control the timing of the method steps which are to be carried out during a preheating phase of the fluorescent lamp 2.
- the ballast 1 is provided with a lamp voltage measuring device 9 and an electrode resistance measuring device 10.
- the measured values from the lamp voltage measuring device 9 and the electrode resistance measuring device 10 are fed to the measured value evaluator 6.
- the measured value evaluator 6 thus carries out the YES / NO queries required by the proposed method during the preheating phase. In addition, it evaluates the measured lamp voltage U L and the registered lamp nominal voltages U L1 ... U Ln and determines the exact lamp type in accordance with the proposed method.
- a DC voltage generator G generates a regulated logic voltage U Logi ⁇ , with which it supplies the parts of the ballast 1 involved in data processing, namely the control device 4, the sequence control 5, the measured value evaluator 6, the register 7, the frequency generator 8, the lamp voltage measuring device 9 and the electrode resistance measuring device 10, supplied with energy.
- a control circuit 11 which cooperates with the frequency generator 8 and supplies the fluorescent lamp 2 with an AC voltage via power transistors 12 and 13, is likewise supplied with the logic voltage U logic .
- control circuit 11 and the downstream power transistors 12 and 13 are supplied with a high voltage via a separate output of the DC voltage generator G in order to achieve the Operate fluorescent lamp.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/830,522 US6525479B1 (en) | 1998-10-27 | 1999-10-27 | Method and ballast for operating a lamp fitted with a fluorescent tube |
AT99960821T ATE216177T1 (de) | 1998-10-27 | 1999-10-27 | Verfahren und vorschaltgerät zum betrieb einer mit einer leuchtstofflampe versehenen leuchte |
EP99960821A EP1125477B1 (de) | 1998-10-27 | 1999-10-27 | Verfahren und vorschaltgerät zum betrieb einer mit einer leuchtstofflampe versehenen leuchte |
DE59901229T DE59901229D1 (de) | 1998-10-27 | 1999-10-27 | Verfahren und vorschaltgerät zum betrieb einer mit einer leuchtstofflampe versehenen leuchte |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19850441.1 | 1998-10-27 | ||
DE19850441A DE19850441A1 (de) | 1998-10-27 | 1998-10-27 | Verfahren und Vorschaltgerät zum Betrieb einer mit einer Leuchtstofflampe versehenen Leuchte |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000025554A2 true WO2000025554A2 (de) | 2000-05-04 |
WO2000025554A3 WO2000025554A3 (de) | 2000-08-17 |
Family
ID=7886404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/003422 WO2000025554A2 (de) | 1998-10-27 | 1999-10-27 | Verfahren und vorschaltgerät zum betrieb einer mit einer leuchtstofflampe versehenen leuchte |
Country Status (5)
Country | Link |
---|---|
US (1) | US6525479B1 (de) |
EP (1) | EP1125477B1 (de) |
AT (1) | ATE216177T1 (de) |
DE (2) | DE19850441A1 (de) |
WO (1) | WO2000025554A2 (de) |
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EP1235468A2 (de) * | 2001-02-27 | 2002-08-28 | STMicroelectronics, Inc. | Vorschaltgerät mit Mikrorechnersteuerung und zugehörige Verfahren |
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DE10016035A1 (de) * | 2000-03-31 | 2001-10-18 | Trilux Lenze Gmbh & Co Kg | Verfahren und Vorschaltgerät zum Dimmen einer mit einer Leuchtstofflampe versehenen Leuchte |
US6359387B1 (en) * | 2000-08-31 | 2002-03-19 | Philips Electronics North America Corporation | Gas-discharge lamp type recognition based on built-in lamp electrical properties |
DE10045711A1 (de) * | 2000-09-15 | 2002-03-28 | Tridonic Bauelemente Gmbh Dorn | Elektronisches Vorschaltgerät |
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US7589472B2 (en) * | 2003-12-11 | 2009-09-15 | Koninklijke Philips Electronics N.V. | Electronic ballast with lamp type determination |
US6969955B2 (en) * | 2004-01-29 | 2005-11-29 | Axis Technologies, Inc. | Method and apparatus for dimming control of electronic ballasts |
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US7560866B2 (en) | 2005-04-18 | 2009-07-14 | Marvell World Trade Ltd. | Control system for fluorescent light fixture |
US7414369B2 (en) * | 2005-04-18 | 2008-08-19 | Marvell World Trade Ltd. | Control system for fluorescent light fixture |
DE102005018761A1 (de) * | 2005-04-22 | 2006-10-26 | Tridonicatco Gmbh & Co. Kg | Intelligente Flyback-Heizung |
DE202005011887U1 (de) * | 2005-07-28 | 2005-10-06 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Elektronische Schaltungsanordnung zur Steuerung eines elektronischen Vorschaltgeräts |
DE202005013754U1 (de) * | 2005-08-31 | 2005-11-17 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Vorschaltgerät für eine Entladungslampe mit adaptiver Vorheizung |
DE102007008148A1 (de) | 2007-02-19 | 2008-08-21 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Universal-EVG zum Betrieb Hg-freier und Hg-haltiger D-Lampen |
JP2009004332A (ja) * | 2007-06-25 | 2009-01-08 | Sansha Electric Mfg Co Ltd | 放電ランプ点灯制御装置及び電源回路 |
DE102008012454A1 (de) | 2008-03-04 | 2009-09-10 | Tridonicatco Gmbh & Co. Kg | Verfahren zum Bestimmen von Betriebsparametern einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe sowie ein entsprechendes Vorschaltgerät |
DE102007047142A1 (de) | 2007-10-02 | 2009-04-09 | Tridonicatco Gmbh & Co. Kg | Verfahren zum Erkennen des Typs einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe sowie elektronisches Vorschaltgerät |
ATE523065T1 (de) * | 2007-10-02 | 2011-09-15 | Tridonic Gmbh & Co Kg | Verfahren zum bestimmen von betriebsparametern einer mit einem elektronischen vorschaltgerät zu betreibenden gasentladungslampe sowie ein entsprechendes vorschaltgerät |
US7868561B2 (en) | 2007-10-31 | 2011-01-11 | Lutron Electronics Co., Inc. | Two-wire dimmer circuit for a screw-in compact fluorescent lamp |
DE102008022198A1 (de) | 2008-03-04 | 2009-09-10 | Tridonicatco Gmbh & Co. Kg | Typerkennung einer mit einem elektronischen Vorschaltgerät zu betreibenden Gasentladungslampe |
DE102008012453A1 (de) | 2008-03-04 | 2009-09-10 | Tridonicatco Gmbh & Co. Kg | Verfahren zum Prüfen, ob mindestens zwei mit einem elektronischen Vorschaltgerät zu betreibende Gasentladungslampen vom gleichen Typ sind |
DE102008016753A1 (de) * | 2008-03-31 | 2009-10-01 | Tridonicatco Schweiz Ag | Erkennung des Typs einer Hochdruck (HID)-Entladungslampe |
DE102008019158B3 (de) * | 2008-04-17 | 2009-11-05 | Vossloh-Schwabe Deutschland Gmbh | Lampentyperkennung für Gasentladungslampen bei Kaltstart |
KR20110007225A (ko) * | 2008-04-25 | 2011-01-21 | 오스람 게젤샤프트 미트 베쉬랭크터 하프퉁 | 적어도 하나의 방전 램프를 동작시키기 위한 방법 및 회로 어레인지먼트 |
DE102008031409A1 (de) * | 2008-07-02 | 2010-01-07 | Tridonicatco Gmbh & Co. Kg | Erkennung des Typs einer an einem Betriebsgerät angeschlossenen Gasentladungslampe |
DE102008047440A1 (de) | 2008-09-16 | 2010-03-25 | Tridonicatco Gmbh & Co. Kg | Bestimmung des Typs eines Leuchtmittels oder der Topologie mehrerer Leuchtmittel |
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US20130187562A1 (en) * | 2010-09-28 | 2013-07-25 | Koninklijke Philips Electronics N.V. | Device and method for automatically detecting installed lamp type |
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1998
- 1998-10-27 DE DE19850441A patent/DE19850441A1/de not_active Withdrawn
-
1999
- 1999-10-27 EP EP99960821A patent/EP1125477B1/de not_active Expired - Lifetime
- 1999-10-27 US US09/830,522 patent/US6525479B1/en not_active Expired - Fee Related
- 1999-10-27 DE DE59901229T patent/DE59901229D1/de not_active Expired - Lifetime
- 1999-10-27 WO PCT/DE1999/003422 patent/WO2000025554A2/de active IP Right Grant
- 1999-10-27 AT AT99960821T patent/ATE216177T1/de not_active IP Right Cessation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0413991A1 (de) * | 1989-07-28 | 1991-02-27 | Toshiba Lighting & Technology Corporation | Entladungslampenversorgungsapparat zur Steuerung der Lampe, abhängig von ihrem Typ |
EP0759686A2 (de) * | 1995-08-18 | 1997-02-26 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Verfahren und Schaltungsanordnung zum Betreiben einer elektrischen Lampe |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 672 (E-1646), 19. Dezember 1994 (1994-12-19) & JP 06 267687 A (HITACHI LIGHTING LTD), 22. September 1994 (1994-09-22) * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1235468A2 (de) * | 2001-02-27 | 2002-08-28 | STMicroelectronics, Inc. | Vorschaltgerät mit Mikrorechnersteuerung und zugehörige Verfahren |
EP1235468A3 (de) * | 2001-02-27 | 2004-08-04 | STMicroelectronics, Inc. | Vorschaltgerät mit Mikrorechnersteuerung und zugehörige Verfahren |
Also Published As
Publication number | Publication date |
---|---|
EP1125477B1 (de) | 2002-04-10 |
DE59901229D1 (de) | 2002-05-16 |
ATE216177T1 (de) | 2002-04-15 |
EP1125477A2 (de) | 2001-08-22 |
DE19850441A1 (de) | 2000-05-11 |
US6525479B1 (en) | 2003-02-25 |
WO2000025554A3 (de) | 2000-08-17 |
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