EP0491434A1 - Dispositif pour déconnexion d'une électrode d'une lampe - Google Patents
Dispositif pour déconnexion d'une électrode d'une lampe Download PDFInfo
- Publication number
- EP0491434A1 EP0491434A1 EP91203266A EP91203266A EP0491434A1 EP 0491434 A1 EP0491434 A1 EP 0491434A1 EP 91203266 A EP91203266 A EP 91203266A EP 91203266 A EP91203266 A EP 91203266A EP 0491434 A1 EP0491434 A1 EP 0491434A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- electrode
- voltage
- fluorescent lamp
- semiconductor
- 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
Images
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
-
- 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
- H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
- H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
- H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
- H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
- H05B41/2325—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps provided with pre-heating electrodes
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- 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
- Y10S315/00—Electric lamp and discharge devices: systems
- Y10S315/05—Starting and operating circuit for fluorescent lamp
Definitions
- One of the features of the invention is that it responds to the decrease in voltage across the lamps of a two lamp rapid start fluorescent lamp system which takes place after lamp ignition.
- One of the advantages of the invention is that it decouples all of the filaments of a rapid start fluorescent lamp system from the filament windings upon ignition of the fluorescent lamps of the system.
- a fluorescent lamp system for operating one or more fluorescent lamps having a pair of electrodes.
- a ballast is provided for connection to a proper source of voltage.
- the ballast when connected to a proper source of voltage provides voltage across the lamp.
- the ballast includes a plurality of electrode windings.
- a plurality of semiconductor switches is provided, each of which connects one of the electrode windings to a respective lamp electrode.
- Control means is connected across the lamp and responds to the voltage across the lamp when the lamp is on to render each of the semiconductor switches non-conductive.
- the control means responds to the voltage across the lamp when the lamp is off to render each of the semiconductive switches conductive.
- control means connected across the lamp, responds to the voltage across the lamp when the lamp is off. By conducting current which current renders each switch conductive; the control means responds to the voltage across the lamp when the lamp is on by becoming non-conductive and thereby rendering each switch non-conductive.
- the ballast comprises a transformer including a primary windings and a secondary winding, and at least one electrode winding comprises a portion of said secondary winding. Since 11 of the filaments are decoupled from the filament windings upon ignition of the fluorescent lamps of the system, no uncontrollable voltage can be generated during lamp operation.
- Electrode 11a is connected across heater winding 15 of autotransformer 17 through triac TR1. Electrodes 11b and 13a are connected through triac TR2 across heater winding 19 of transformer 17. Electrode 13b is connected through triac TR3 across winding 21 which forms part of primary winding PR of transformer 17. As is typical primary winding PR and secondary winding SE are connected through capacitor C1 across lamps 11 and 13 to provide operating voltage thereto. Such an operating voltage will be supplied when primary winding PR is connected to a proper source of voltage through lines 23 and 25.
- Starting capacitor C2 is connected across lamp 1 in order for lamp 13 to start first and lamp 11 to follow in sequence thereafter. Also connected across lamps 11 and 13 from terminal A to terminal B is a circuit comprising sidac S1 resistor R1 and a diode bridge comprising diodes D1-D4. Connected in series across the diode bridge are the inputs 1 and 2 of optical couplers OC1, OC2 and OC3. As is well known a photodiode is connected across the input terminals 1 and 2 of optical couplers OC3. As is also well known a light activated triac is connected across the output terminals 4 and 6 of each optical coupler OC1, OC2 and OC3.
- optical couplers OC1, OC2 and OC3 provide electrical isolation between the diode bridge D1-D4 and the circuitry the light activated triacs are connected to.
- These light activated triacs of optical couplers OC1, OC2 and OC3 are connected through resistors R2, R3 and R4 to the gates of triacs TR1, TR2 and TR3, respectively, to render triacs TR1, TR2 and TR3 separately controlled.
- Signals for the gates of triacs TR1, TR2 and TR3 are generated by the voltages across the associated electrode windings 15, 19 and 21, respectively.
- the main conduction paths of triacs TR1, TR2 and TR3 are connected in series with heater windings 15, 19 and 21 and their respective lamp electrodes 11a, 11b and 13a, and 13b.
- triacs TR1, TR2 and TR3 are rendered conductible and permit heater windings 15, 19 and 21 to provide heating current to electrodes 11a, 11b, 13a, and 13b of lamps 11 and 13.
- Upon heating sufficiently electrode 13a and 13b will start conduction in lamp 13 to be followed shortly thereafter by conduction in lamp 11.
- lamps 11 and 13 conducting the voltage across the lamps and across terminals A and B is no longer high enough to allow sidac S1 to conduct.
- the light emitting diodes of optical couplers OC1, OC2 and OC3 no longer have voltage applied to them and can no longer emit light.
- control means comprising the circuitry containing sidac S1 and the optical couplers OC1, OC2 enabled triacs TR1, TR2 and TR3 to provide heating power to the electrodes of lamps 11 and 13 to enable them to ignite and upon ignition the control means responded to the reduction in the voltage across the lamps to render triacs TR1, TR2 and TR3 non-conductive.
- the optical couplers have been identified by the reference characters OC1', OC2' and OC3' to distinguish them from the optical couplers of the other two embodiments.
- These optical couplers were Toshiba catalog part number TLP3520 type which combines the function of an optical coupler with an output triac in a single integrated circuit package. Consequently, separate triacs such as TR1, TR2 and TR3 of the other two embodiments disclosed herein and the resistors associated therewith are not necessary in the Figure 3 embodiment. Otherwise the operation of the Figure 3 embodiment is the same as that of the Figure 1 and Figure 2 embodiments.
- the electrode winding 15 forms part of the secondary winding SE and the electrode winding 21 forms part of the primary winding PR. Otherwise the operation of the Figure 4 embodiment is the same as that of the Figure 2 embodiment.
- ballast arrangement As those skilled in the art will appreciate, while only one type of ballast arrangement has been specifically disclosed herein the invention described will operate with various other ballast arrangements.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US629868 | 1984-07-11 | ||
US673692 | 1984-11-21 | ||
US07/629,868 US5175470A (en) | 1990-12-19 | 1990-12-19 | Fluorescent lamp electrode disconnect arrangement |
US07/673,692 US5208511A (en) | 1991-03-21 | 1991-03-21 | Fluorescent lamp electrode disconnect arrangement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0491434A1 true EP0491434A1 (fr) | 1992-06-24 |
EP0491434B1 EP0491434B1 (fr) | 1996-07-17 |
Family
ID=27091029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91203266A Expired - Lifetime EP0491434B1 (fr) | 1990-12-19 | 1991-12-11 | Dispositif pour déconnexion d'une électrode d'une lampe |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0491434B1 (fr) |
JP (1) | JPH04277494A (fr) |
KR (1) | KR100218555B1 (fr) |
CA (1) | CA2057682A1 (fr) |
DE (1) | DE69120913T2 (fr) |
HU (1) | HU213126B (fr) |
MX (1) | MX9102104A (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0610998A1 (fr) * | 1993-02-08 | 1994-08-17 | Koninklijke Philips Electronics N.V. | Ballast pour lampe fluorescente |
US6111369A (en) * | 1998-12-18 | 2000-08-29 | Clalight Israel Ltd. | Electronic ballast |
WO2004071135A1 (fr) * | 2003-02-04 | 2004-08-19 | Hep Tech Co. Ltd. | Ballast electronique |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4010399A (en) * | 1975-12-22 | 1977-03-01 | Gte Sylvania Incorporated | Switching circuit for a fluorescent lamp with heated filaments |
DE3312572A1 (de) * | 1983-04-08 | 1984-10-18 | Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg | Elektronisches vorschaltgeraet fuer eine leuchtstofflampe |
FR2550043A1 (fr) * | 1983-07-28 | 1985-02-01 | Diehl Gmbh & Co | Montage pour amorcer des lampes a substance luminescente et en regler la luminosite |
EP0150585A1 (fr) * | 1984-01-26 | 1985-08-07 | Rodney Cairn Hope | Contrôleur de courant de sortie pour ballast de lampe fluorescente |
-
1991
- 1991-11-18 MX MX9102104A patent/MX9102104A/es not_active IP Right Cessation
- 1991-12-11 EP EP91203266A patent/EP0491434B1/fr not_active Expired - Lifetime
- 1991-12-11 DE DE69120913T patent/DE69120913T2/de not_active Expired - Fee Related
- 1991-12-16 JP JP3332030A patent/JPH04277494A/ja active Pending
- 1991-12-16 CA CA002057682A patent/CA2057682A1/fr not_active Abandoned
- 1991-12-16 HU HU913971A patent/HU213126B/hu not_active IP Right Cessation
- 1991-12-16 KR KR1019910023071A patent/KR100218555B1/ko not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4010399A (en) * | 1975-12-22 | 1977-03-01 | Gte Sylvania Incorporated | Switching circuit for a fluorescent lamp with heated filaments |
DE3312572A1 (de) * | 1983-04-08 | 1984-10-18 | Trilux-Lenze Gmbh + Co Kg, 5760 Arnsberg | Elektronisches vorschaltgeraet fuer eine leuchtstofflampe |
FR2550043A1 (fr) * | 1983-07-28 | 1985-02-01 | Diehl Gmbh & Co | Montage pour amorcer des lampes a substance luminescente et en regler la luminosite |
EP0150585A1 (fr) * | 1984-01-26 | 1985-08-07 | Rodney Cairn Hope | Contrôleur de courant de sortie pour ballast de lampe fluorescente |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 7, no. 239 (E-206)(1384) 25 October 1983 & JP-A-58 128 650 ( MATSUSHITA DENKO K.K. ) 1 August 1983 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0610998A1 (fr) * | 1993-02-08 | 1994-08-17 | Koninklijke Philips Electronics N.V. | Ballast pour lampe fluorescente |
US6111369A (en) * | 1998-12-18 | 2000-08-29 | Clalight Israel Ltd. | Electronic ballast |
WO2004071135A1 (fr) * | 2003-02-04 | 2004-08-19 | Hep Tech Co. Ltd. | Ballast electronique |
US7279844B2 (en) | 2003-02-04 | 2007-10-09 | Hep Tech Co. Ltd. | Electronic ballast |
Also Published As
Publication number | Publication date |
---|---|
DE69120913D1 (de) | 1996-08-22 |
DE69120913T2 (de) | 1997-01-16 |
KR920014370A (ko) | 1992-07-30 |
HUT59785A (en) | 1992-06-29 |
EP0491434B1 (fr) | 1996-07-17 |
MX9102104A (es) | 1992-06-01 |
CA2057682A1 (fr) | 1992-06-20 |
JPH04277494A (ja) | 1992-10-02 |
KR100218555B1 (ko) | 1999-09-01 |
HU913971D0 (en) | 1992-03-30 |
HU213126B (en) | 1997-02-28 |
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