CA2036168A1 - Fluorescent lamp stabilizer circuit device - Google Patents
Fluorescent lamp stabilizer circuit deviceInfo
- Publication number
- CA2036168A1 CA2036168A1 CA 2036168 CA2036168A CA2036168A1 CA 2036168 A1 CA2036168 A1 CA 2036168A1 CA 2036168 CA2036168 CA 2036168 CA 2036168 A CA2036168 A CA 2036168A CA 2036168 A1 CA2036168 A1 CA 2036168A1
- Authority
- CA
- Canada
- Prior art keywords
- fluorescent lamp
- lamp tube
- voltage
- transistor
- circuit device
- 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.)
- Abandoned
Links
- 239000003381 stabilizer Substances 0.000 title claims abstract description 11
- 230000010355 oscillation Effects 0.000 claims abstract description 3
- 239000003990 capacitor Substances 0.000 claims description 14
- 239000000411 inducer Substances 0.000 claims description 10
- 239000007858 starting material Substances 0.000 description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 2
- 244000228957 Ferula foetida Species 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- H05B41/16—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
-
- 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
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
FLUORESCENT LAMP STABILIZER CIRCUIT DEVICE
ABSTRACT:
A fluorescent lamp stabilizer circuit device of the type comprising two transistor switches which are alternatively switched on/off so as to control two charging circuits to provide an impulse voltage double that of power supply voltage for charging a fluorescent lamp tube to give off light. A resonance circuit is provided to generate damped oscillation so as to drop output voltage to the fluorescent lamp tube to a rated range immediately after the fluorescent lamp tube is turned on.
ABSTRACT:
A fluorescent lamp stabilizer circuit device of the type comprising two transistor switches which are alternatively switched on/off so as to control two charging circuits to provide an impulse voltage double that of power supply voltage for charging a fluorescent lamp tube to give off light. A resonance circuit is provided to generate damped oscillation so as to drop output voltage to the fluorescent lamp tube to a rated range immediately after the fluorescent lamp tube is turned on.
Description
20361 ~8 FLUORESCENT LAMP STABILIZER CIRCUIT DEVICE
BACKGROUND OF THE INVENTION: .
The present invention relates to fluorescent lamp ~tabilizer circuit devices, and more particularly relates to a fluorescent lamp ~tabilizer circuit device which permitq an un~erviceable fluorescent lamp tube to keep serving and can eliminate fla~hing problem while turning on a fluore~cent lamp.
In a fluorescent lamp device, a stabilizer is u~ed with a starter to heat the tung~ten filaments at the two opposite ends of a ~luorescent lamp tube permitting the mercury vapor in the tube to be acted by a ~tream of electrons from the cathode thereof 80 that the fluorescent sub~tance coated on the inside of the tube gives light. In thi~ structure, the starter may trip off ea~ily after having been used for a certain period of time, to cau~e the tungsten filaments at the two opposite ends of a fluore~cent lamp tube to be con~tantly in a heated or extingui~hed s~atus to damage the fluore~cent sub~tance coating. Under this condition, the starter and the fluore~cent lamp tube 203~~8 must replaced. Further, flaqhing problem may happen frequently ~hen turning on ,a fluore~cent lamp.
SUMMARY OF THE INVENTION:
The present invention has been accomplished under the circumstance~ in view. It i~ an ob~ect of the present invention to provide a fluoreYcent lamp stabilizer circuit device which can instantaneously turn on a fluorescent lamp tube without causing any flashing problem.
It is another object of the present invention to provide a fluorescent lamp stabilizer circuit device which eliminates the use of a starter and permits a fluorexcent lamp tube to keep working when its tungsten filaments ar~ burn out or damaged.
:-To achieve the above objects, a fluorescent lamp stabilizer circuit device of the present invention comprises two transi~tor switche~ which are alternatively switched on/off so as to control two charging circuits to provide an impulse voltage double that of power Yupply voltage for charging a fluore4cent lamp tube to give off light. A resonance circuit i9 provided to generate damped o~cillation so as to drop : 2 2~3~1~8 output voltage to the fluoreqcent lamp tube to a rated range immediately after the fluorescent la~p tube is turned on.
BRIEF DESCRIPTION OF THE DRAWING:
The present invention will now be de~cribed by way of example with reference to the annexed drawing of Fig. 1, which iq a circuit diagram of the pre3ent invention.
DETAILED DESCRIPTION F T~E PREFERRED EMBODIMENT:
Referring to Fig. 1, a fluorescent lamp stabilizer circuit device of the present invention is generally comprised of tran~i.qtor~ GBl, GB2, capacitors Cl, C2, Resi~tors RBl, RB2, inducer L and fiuore~cent lamp tube R. The whole circuit compri~e~ total five terminals, in which terminals 1 and 2 are for AC power input. The positive end of capacitor C1 is connected to terminal 1. Resistor RB1 i~ connected between terminal 1 and the base of transi~tor GB1. The emitter of tran~i~tor GB2, the po~itive end of capacitor C2, one end of inducer L and the positive end of resi~tor RB2 are re~pectively connected to terminal 2. The 2~3~
opposite end of re3istor RB2 i8 connected to the base of transistor GB2. The of transistor GBl, the negative end of capacitor C2 and the oppo~ite end of fluoxe~cent lamp tube R are respectively connected to terminal 4.
The whole circuit ~tructure of the fluorescent lamp stabilizer circuit device forms two charging circuits and a resonance circuit and the operation of which is outlined hereinafter. When AC power iq connected between terminal~ 1 and 2 and if terminal 1 i~ positive and terminal 2 is negative, transistor GBl i~ turned on immediately and transistor GB2 i3 cut off, i.e.
transistor~ GBl and GB2 compensate each other.
Therefore, terminals 1, 3 and 2 form a charging circuit to charge capacitor C1 to the voltage range V12 at terminals 1 and 2. If terminal 2 is positive and terminal 1 is negative, transistor GBl is cut off and transistor GB2 is turned on when AC power is connected thereto, and terminals 2, 4 and 3 form a circuit permitting the voltage at capacitor C1 and the voltage V12 from power source to be added together for charging capacitor C2. Therefore a tran~ient voltage, the value of which is double over the voltage from power source, can be obtained at terminal~ 2 and 4, which transient voltage iq an impulse voltage discharged to inducer L
2~36168 and fluorescent lamp tube R so as to instantly turn on fluorescent lamp R. At the same time, a discharge current is sent through inducer L to cause inducer L to produce an impedance which re~trains the current.
Because capacitor C2, inducer ~ and fluorescent lamp tube R are connected in parallel to form a resonance circuit, capacitor C2 produces damped oscillation while discharging, and therefore ~lashing problem is eliminated when fluorescent lamp tube is charged to produce light. Because tungsten filament i3 eliminated from the present invention and a fluorescent lamp tube i9 started by transient impulse voltage before normal voltage is supplied, a waste fluorescent lamp tube can still be re-used even if the tungsten filament of which is burned out or damaged.
BACKGROUND OF THE INVENTION: .
The present invention relates to fluorescent lamp ~tabilizer circuit devices, and more particularly relates to a fluorescent lamp ~tabilizer circuit device which permitq an un~erviceable fluorescent lamp tube to keep serving and can eliminate fla~hing problem while turning on a fluore~cent lamp.
In a fluorescent lamp device, a stabilizer is u~ed with a starter to heat the tung~ten filaments at the two opposite ends of a ~luorescent lamp tube permitting the mercury vapor in the tube to be acted by a ~tream of electrons from the cathode thereof 80 that the fluorescent sub~tance coated on the inside of the tube gives light. In thi~ structure, the starter may trip off ea~ily after having been used for a certain period of time, to cau~e the tungsten filaments at the two opposite ends of a fluore~cent lamp tube to be con~tantly in a heated or extingui~hed s~atus to damage the fluore~cent sub~tance coating. Under this condition, the starter and the fluore~cent lamp tube 203~~8 must replaced. Further, flaqhing problem may happen frequently ~hen turning on ,a fluore~cent lamp.
SUMMARY OF THE INVENTION:
The present invention has been accomplished under the circumstance~ in view. It i~ an ob~ect of the present invention to provide a fluoreYcent lamp stabilizer circuit device which can instantaneously turn on a fluorescent lamp tube without causing any flashing problem.
It is another object of the present invention to provide a fluorescent lamp stabilizer circuit device which eliminates the use of a starter and permits a fluorexcent lamp tube to keep working when its tungsten filaments ar~ burn out or damaged.
:-To achieve the above objects, a fluorescent lamp stabilizer circuit device of the present invention comprises two transi~tor switche~ which are alternatively switched on/off so as to control two charging circuits to provide an impulse voltage double that of power Yupply voltage for charging a fluore4cent lamp tube to give off light. A resonance circuit i9 provided to generate damped o~cillation so as to drop : 2 2~3~1~8 output voltage to the fluoreqcent lamp tube to a rated range immediately after the fluorescent la~p tube is turned on.
BRIEF DESCRIPTION OF THE DRAWING:
The present invention will now be de~cribed by way of example with reference to the annexed drawing of Fig. 1, which iq a circuit diagram of the pre3ent invention.
DETAILED DESCRIPTION F T~E PREFERRED EMBODIMENT:
Referring to Fig. 1, a fluorescent lamp stabilizer circuit device of the present invention is generally comprised of tran~i.qtor~ GBl, GB2, capacitors Cl, C2, Resi~tors RBl, RB2, inducer L and fiuore~cent lamp tube R. The whole circuit compri~e~ total five terminals, in which terminals 1 and 2 are for AC power input. The positive end of capacitor C1 is connected to terminal 1. Resistor RB1 i~ connected between terminal 1 and the base of transi~tor GB1. The emitter of tran~i~tor GB2, the po~itive end of capacitor C2, one end of inducer L and the positive end of resi~tor RB2 are re~pectively connected to terminal 2. The 2~3~
opposite end of re3istor RB2 i8 connected to the base of transistor GB2. The of transistor GBl, the negative end of capacitor C2 and the oppo~ite end of fluoxe~cent lamp tube R are respectively connected to terminal 4.
The whole circuit ~tructure of the fluorescent lamp stabilizer circuit device forms two charging circuits and a resonance circuit and the operation of which is outlined hereinafter. When AC power iq connected between terminal~ 1 and 2 and if terminal 1 i~ positive and terminal 2 is negative, transistor GBl i~ turned on immediately and transistor GB2 i3 cut off, i.e.
transistor~ GBl and GB2 compensate each other.
Therefore, terminals 1, 3 and 2 form a charging circuit to charge capacitor C1 to the voltage range V12 at terminals 1 and 2. If terminal 2 is positive and terminal 1 is negative, transistor GBl is cut off and transistor GB2 is turned on when AC power is connected thereto, and terminals 2, 4 and 3 form a circuit permitting the voltage at capacitor C1 and the voltage V12 from power source to be added together for charging capacitor C2. Therefore a tran~ient voltage, the value of which is double over the voltage from power source, can be obtained at terminal~ 2 and 4, which transient voltage iq an impulse voltage discharged to inducer L
2~36168 and fluorescent lamp tube R so as to instantly turn on fluorescent lamp R. At the same time, a discharge current is sent through inducer L to cause inducer L to produce an impedance which re~trains the current.
Because capacitor C2, inducer ~ and fluorescent lamp tube R are connected in parallel to form a resonance circuit, capacitor C2 produces damped oscillation while discharging, and therefore ~lashing problem is eliminated when fluorescent lamp tube is charged to produce light. Because tungsten filament i3 eliminated from the present invention and a fluorescent lamp tube i9 started by transient impulse voltage before normal voltage is supplied, a waste fluorescent lamp tube can still be re-used even if the tungsten filament of which is burned out or damaged.
Claims
1. A fluorescent lamp stabilizer circuit device, comprised of two transistors, two capacitors, two Resistors, an inducer and a fluorescent lamp tube, said transistors being alternatively switched on/off, characterized in that:
a first charging circuit is formed, when the first transistor is switched on and the second transistor is switched off, to charge the first capacitor to the voltage range of power supply;
a second charging circuit is formed, when the first transistor is switched off and the second transistor is switched on, to charge the second transistor to the range of power supply voltage plus the terminal voltage at the first capacitor 90 as to provide an impulse terminal voltage at the second capacitor double that of power supply voltage permitting said impulse terminal voltage to instantaneously turn on said fluorescent lamp tube via said inducer;
said capacitors, inducer and fluorescent lamp tube form a resonance circuit to provide damped oscillation so as to eliminate flashing when said fluorescent lamp tube is turned on; and said inducer restrains the current through said fluorescent lamp tube so as to drop the voltage at said fluorescent lamp tube to a rated voltage range once said fluorescent lamp tube is turned on.
a first charging circuit is formed, when the first transistor is switched on and the second transistor is switched off, to charge the first capacitor to the voltage range of power supply;
a second charging circuit is formed, when the first transistor is switched off and the second transistor is switched on, to charge the second transistor to the range of power supply voltage plus the terminal voltage at the first capacitor 90 as to provide an impulse terminal voltage at the second capacitor double that of power supply voltage permitting said impulse terminal voltage to instantaneously turn on said fluorescent lamp tube via said inducer;
said capacitors, inducer and fluorescent lamp tube form a resonance circuit to provide damped oscillation so as to eliminate flashing when said fluorescent lamp tube is turned on; and said inducer restrains the current through said fluorescent lamp tube so as to drop the voltage at said fluorescent lamp tube to a rated voltage range once said fluorescent lamp tube is turned on.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9102861A GB2252687A (en) | 1991-02-11 | 1991-02-11 | Fluorescent lamp stabilizer circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2036168A1 true CA2036168A1 (en) | 1992-08-13 |
Family
ID=10689845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2036168 Abandoned CA2036168A1 (en) | 1991-02-11 | 1991-02-12 | Fluorescent lamp stabilizer circuit device |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA2036168A1 (en) |
| CH (1) | CH681587A5 (en) |
| GB (1) | GB2252687A (en) |
| NL (1) | NL9101970A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2279514A (en) * | 1993-06-24 | 1995-01-04 | Strand Lighting Ltd | Power control converter circuit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3676735A (en) * | 1969-09-25 | 1972-07-11 | Sylvania Electric Prod | Resonator ballast for arc discharge lamps |
| NL179698B (en) * | 1974-09-18 | 1986-05-16 | Philips Nv | GAS AND / OR VAPOR DISCHARGE HEATER. |
| GB2104319A (en) * | 1981-08-25 | 1983-03-02 | Home Electric Company Limited | Fluorescent lamp starter apparatus |
| US4687971A (en) * | 1984-11-08 | 1987-08-18 | Fuji Xerox Company, Limited | Power supply for discharge lamp |
| US4717863A (en) * | 1986-02-18 | 1988-01-05 | Zeiler Kenneth T | Frequency modulation ballast circuit |
-
1991
- 1991-02-11 GB GB9102861A patent/GB2252687A/en not_active Withdrawn
- 1991-02-12 CA CA 2036168 patent/CA2036168A1/en not_active Abandoned
- 1991-03-05 CH CH67591A patent/CH681587A5/de not_active IP Right Cessation
- 1991-11-25 NL NL9101970A patent/NL9101970A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2252687A (en) | 1992-08-12 |
| GB9102861D0 (en) | 1991-03-27 |
| CH681587A5 (en) | 1993-04-15 |
| NL9101970A (en) | 1993-06-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |