[go: up one dir, main page]

EP0296558B1 - Speiseanordnung für eine Entladungslampe - Google Patents

Speiseanordnung für eine Entladungslampe Download PDF

Info

Publication number
EP0296558B1
EP0296558B1 EP88109921A EP88109921A EP0296558B1 EP 0296558 B1 EP0296558 B1 EP 0296558B1 EP 88109921 A EP88109921 A EP 88109921A EP 88109921 A EP88109921 A EP 88109921A EP 0296558 B1 EP0296558 B1 EP 0296558B1
Authority
EP
European Patent Office
Prior art keywords
switch
flop
transistor
lamp
flip
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.)
Expired - Lifetime
Application number
EP88109921A
Other languages
English (en)
French (fr)
Other versions
EP0296558A1 (de
Inventor
Philippe Déglon
Werner Schneiter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Omega Electronics SA
Original Assignee
Omega Electronics SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Omega Electronics SA filed Critical Omega Electronics SA
Publication of EP0296558A1 publication Critical patent/EP0296558A1/de
Application granted granted Critical
Publication of EP0296558B1 publication Critical patent/EP0296558B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • 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
    • H05B41/2825—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 by means of a bridge converter in the final stage
    • H05B41/2828—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 by means of a bridge converter in the final stage using control circuits for the switching elements

Definitions

  • the present invention relates, according to a first embodiment, to a device for supplying a discharge lamp comprising a first generator capable of supplying a voltage pulse capable of creating the initiation of the discharge in the lamp and a second generator able to maintain a discharge current in the lamp said second generator comprising a first electrical circuit comprising the placing in series of a DC voltage source, a first switch and a second switch, said first and second switches being arranged such that when the first is closed, the second is open and vice versa, and a second electrical circuit comprising the placing in series of an inductor and said lamp, connected in parallel to said second switch, said switches being actuated by a first control device supplied with an alternating signal of fixed period T1, said first control device the control being arranged to supply at its output a signal suitable for alternately switching said first switch first in a closed state for a first time of duration T a , then in an open state for a second time of duration T b .
  • the present invention also relates, according to a second embodiment, to a device for supplying a discharge lamp equipped with a first cold electrode and a second electrode provided with a filament, said device comprising a first generator capable of to supply a voltage pulse capable of creating the initiation of the discharge in the lamp and a second generator capable of heating the filament for a period of duration T d , then of maintaining a discharge current in the lamp.
  • This holding generator which is a current source, is supplied from a DC voltage source and essentially comprises a cascade of two transistors which drive continuously when a setpoint signal is sent to the input of the first transistor.
  • the duration of application of the setpoint signal (which can be a video signal for example) conditions the period during which the current source conducts, period which can be of the order of 14 ms for a lamp giving its full brightness, period followed by a train of periods of similar duration if the lamp is to remain lit at this full brightness.
  • the document FR-A-1366032 proposes a device which is a current source, without own consumption, whatever the value of the load, a charge which is manifested here by the essentially variable arc voltage presented by the lamp.
  • FIG. 1a is a general diagram which shows the basic principle on which the document FR-A-1366032 is based.
  • a discharge lamp 1 which can be a fluorescent tube, is provided with two electrodes 2 and 3.
  • a first generator or choke 4 supplies a voltage pulse capable of creating the initiation of the discharge in the lamp.
  • This first generator is however not mentioned in the document in question, because the supply voltage U1 is sufficiently high (of the order of 400 volts) to allow automatic starting of the discharge in the lamp which, we will see later, is not the case in the present invention where this voltage is only of the order of 60 volts. In this case, this first generator 4 could be one of those described in document EP-A-0152026.
  • FIG. 1a also shows a second generator capable of maintaining the discharge current in the lamp, this second generator comprising a first electrical circuit 5 which comprises the placing in series of a DC voltage source U1, of a first switch I1 and a second switch I2.
  • the switches I1 and I2 are arranged in such a way that when the first is open, the second is closed and vice versa. This interdependence appears in Figure 1a by the dotted line 13 which connects the respective contact tabs of said switches.
  • the diagram also shows that at the terminals of the second switch I2 is connected a second electrical circuit 6 composed of the placing in series of an inductance L and of the discharge lamp 1.
  • the switch I1 is actuated by a control device 7.
  • This device is supplied on its input 8 by an alternating signal of fixed period T1.
  • This signal has its own period T1 composed of alternation of duration T2 at high level followed by alternation of duration T3 at low level.
  • the duty cycle of this signal is defined as the ratio T2 / T1.
  • the alternating signal of fixed period T1 is supplied by an oscillator and the alternations T2 and T3 have a duration approximately equal.
  • FIG. 1a also shows that the control device 7 is arranged to supply at its output 15 a signal suitable for alternately switching the first switch I1 first in a closed state for a first time of duration T a , then in an open state during a second time of duration T b , the sum T a + T b being linked to the input period T1.
  • the electrical energy stored in the inductance L during the previous phase then produces a current i2 which, via the switch I2, flows through the lamp 1.
  • the inductance L then behaves like a generator. Contrary to the current practice of certain known power supplies, this inductor is not a current limiter but behaves like a current reservoir.
  • the i2 current will decrease during the time period T b until you see a new time duration T closes again I1 switch. At the end of period T b a new cycle begins again and so on.
  • the basic assembly has been explained by using two switches I1, I2 actuated by a control device.
  • a transistor working in commutation is used in place of the switch I1, a transistor controlled on its base by the signal coming from the output 15 of the device 7.
  • a diode is advantageously used to replace the switch I2 , diode connected in such a way that it is nonconductive when the transistor is conductive. This diode has the advantage of being self-controlled by the very direction of the voltage present at its terminals.
  • the diagram of Figure 2 shows a way of performing the supply device according to the prior art.
  • the control device 7 is here a type D flip-flop (D-FF) whose set and reset terminals are connected to at least 12 volts of the logic supply.
  • the exit Q of the flip-flop is connected to its input D.
  • the flip-flop On its input 8, the flip-flop receives the alternating signal of fixed period T1, also called clock signal (Cl), signal delivered by an oscillator 9.
  • T1 also called clock signal (Cl), signal delivered by an oscillator 9.
  • the transistor Ti1 is controlled on its base by the Q output of the flip-flop.
  • the collector of transistor Ti1 is connected to diode D1 and the emitter to the voltage source U1.
  • the clock signal Cl On the input 8 of the flip-flop is applied the clock signal Cl, which appears on line a of the diagram.
  • This signal oscillates between -12 V and 0 V (0 V symbolized by the sign ⁇ ), ie between the logical values 0 and 1 respectively.
  • This type of flip-flop (for example CMOS number 4013) has the particularity of having its output Q at the value carried by its input D when the signal Cl goes from 0 to 1 (arrows 18), the passage from 1 to 0 does not in no way changing the state of the Q output as long as the set and reset inputs are both at logic zero (-12 V).
  • As input D is connected to output Q the output Q will change state on each rising edge 18 of the clock signal, as it appears in line b of FIG. 3, the rising edge 18 causing the falling and rising edges 19 of the output Q (arrows 65) .
  • FIG. 3 has been completed by a line d which represents the current I D1 in the diode D1. It can be seen that during the conduction period T a of the transistor Ti1 no current flows in the diode while during the blocking period T b of the same transistor, a current i2 flows in the said diode.
  • the diagram in FIG. 3 also shows a current threshold I lmin below which the current in the lamp does not fall. This comes from the fact that the inductance L is not completely discharged when the cycle T1 starts again.
  • the lamp 1 which most often is a fluorescence lamp, has a cold anode 2 and a hot cathode 3.
  • This cathode is a filament supplied by a continuous source U5 .
  • the present invention is characterized, according to a first embodiment, in that the generator capable of creating the initiation of the discharge in the lamp comprises a third switch connected in parallel on the terminals of the lamp and actuated by a second control device itself actuated by said first control device, said second device being arranged in such a way that said third switch is closed when said power supply device is engaged and then opens the first time that said first switch goes from closed state to open state.
  • the present invention is characterized in that the second generator comprises a first electrical circuit comprising the placing in series of a DC voltage source), a first switch and a second switch, said first and second switches being arranged in such a way that when the first is closed, the second is open and vice versa, and a second electrical circuit comprising the placing in series of an inductor, the first cold electrode and a first terminal of said filament , said second electrical circuit being connected in parallel to said second switch, a third switch being connected on the one hand to said first cold electrode and on the other hand to a second terminal of said filament, that said first and second switches are actuated by a first control device supplied with an alternating signal of fixed period T1, said control device being stopped angular to supply at its output a signal suitable for alternately switching said first switch first in a closed state for a first time of duration T a , then in an open state for a second time of duration T
  • Figure 4 is a block diagram showing the operation of the supply device according to the first embodiment of the invention.
  • the DC voltage source U1 supplying the device according to the invention is at low voltage, for example of the order of 60 volts. It is known that this voltage is insufficient to initiate the discharge in the lamp. It is therefore necessary to send an overvoltage pulse to the lamp when the system is switched on. This pulse is provided by a starter, or first generator symbolized by 4 in FIG. 1a.
  • the overvoltage pulse capable of creating the initiation of the discharge is produced by a third switch I3 connected in parallel on the terminals 2, 3 of the lamp 1.
  • This switch is controlled by a second control device 53, itself actuated by a first control device 7 already described with reference to FIG. 1a.
  • the first switch I1 is also closed, the inductance L stores energy as explained above.
  • the first control device 7 is identical to that described in FIG. 2 where this device is a type D flip-flop.
  • the second control device 53 is a second flip-flop of the same type, powered on its clock input Cl by the signal present at the output Q of the first flip-flop.
  • the signal present at the output Q of the second flip-flop controls the third switch I3 which happens to be a third transistor Ti3.
  • the transistor Ti1 is of the 2N5400 type and the diode D1 of the 1N4148 type.
  • the voltage source U1 is 60 V. It will be observed here that the inductance used is very small (a few mm3) which is an advantage due mainly to the fact that the alternating signal of fixed period T1 is chosen at frequency high, for example greater than 150 kHz.
  • the first embodiment of the invention which has just been described uses a flip-flop 7 connected to a frequency divider by 2.
  • T a + T b 2T1.
  • the diagram presented shows that the conduction period T a of the transistor Ti1 is equal to the opening period T b of the same transistor.
  • the second embodiment particularly concerns the supply of a discharge lamp equipped with a filament.
  • FIG. 5 The block diagram of a first alternative embodiment is shown in FIG. 5.
  • the lamp 1 is equipped with a first cold electrode 2 and a second electrode provided with a filament 56.
  • the second generator of this assembly, formed of circuits 5 and 6 will serve at the same time heating the filament and maintaining the discharge in the lamp.
  • the second electrical circuit 6 includes the series inductance L, the first cold electrode 2 and a first terminal 54 of the filament 56.
  • This second circuit 6 is connected in parallel to the second switch I2 .
  • FIG. 5 also shows a third switch I3 connected on the one hand to the cold electrode 2 and on the other hand to a second terminal 55 of the filament 56.
  • the third switch I3 is actuated by a second control device 53, itself even actuated by the first control device 7.
  • the second device 53 is arranged in such a way that when the supply device is switched on (by a general switch not shown) the third switch I3 closes.
  • the filament 56 is then supplied with energy by the second generator 5, 6 according to the same principle explained above.
  • the filament supply takes place during a period of duration T d supplied by the block 90 acting on an input of the second control device 53.
  • This heating period will last the time it takes to make the filament incandescent, for example a second.
  • the third switch opens, this opening taking place the first time that the first switch I1 changes from the closed state to the open state after the duration period T d .
  • This change of state is in the form of a logic signal at the output 15 of the first control device 7. This same logic signal acts on the second control device 53 and opens the switch I3.
  • the opening of the third switch I3 which is synchronous to the first, causes a overvoltage in the lamp, overvoltage which creates the initiation of the discharge. Then from this the third switch I3 remains open and the lamp 1 is supplied with holding current by the second generator 5, 6.
  • FIG. 6 is a detailed diagram of a first variant of the second embodiment explained above in principle. The new elements added to those of FIG. 2 will be described here.
  • the third switch I3 is a second transistor Ti3 which is controlled by the signal present at the output Q 57 of the control device 53 which is a second type D flip-flop
  • the output Q 15 of the first flip-flop 7 is connected to the input Cl of the second flip-flop 53.
  • the input D 58 of the second flip-flop is connected to the 0 volt of the logic supply by the through a resistor R3 and a capacitor C is connected between this input D and the -12 volts of the logic supply.
  • the set and reset terminals of the second flip-flop are also connected to -12 volts.
  • An inverting amplifier in the form of a transistor Ti4 is interposed between the output Q 57 and the base of the transistor Ti3. Its purpose is to amplify the signal present at the Q output and to invert it at the same time.
  • the second transistor Ti3 has its collector connected to the cold electrode 2 of the lamp and its emitter connected to the second terminal 55 of the filament 56 of the same lamp.
  • the input D 58 of the flip-flop 53 is at logic level 0 (-12 V).
  • the output Q 57 of the flip-flop 53 is also at level 0, the transistor Ti4 conducts and supplies a base current to the transistor Ti3 which also conducts.
  • the filament 56 is then energized and is supplied by the same second generator 5,6 which has been described above (see FIG. 7a).
  • the current I f in the filament is made up of a succession of currents i f1 supplied by the circuit 5 and currents i f2 supplied by the circuit 6 (see start of FIG. 7d). Lamp 1 is then short-circuited by Ti3 and the voltage U1 between terminals 2 and 55 is zero (see start of Figure 7f).
  • the input D 58 of the flip-flop 53 is brought gradually from -12 V to 0 V and this during a period of duration T d which is predetermined by the time constant R3C and which is calculated sufficient to bring the filament to incandescence (see beginning of Figure 7b).
  • T d time constant
  • input D 58 of the second flip-flop is at level 1 (0V). From this moment we understand that the next rising edge 69 applied to the input Cl of the second flip-flop (and coming from the output Q 15 of the first flip-flop 7) switches the output Q 57 of said second flip-flop (arrow 65) which changes to 1 (0V).
  • the transistor Ti3 opens and the current I f in the filament 56 is interrupted (arrow 66).
  • the opening of the transistor Ti3 causes an overvoltage 80 (FIG. 7f, arrow 68) at the terminals of the lamp, overvoltage due to the energy stored in the inductance L and which is released to create the ignition of the arc.
  • the tilting of the output Q 57 of the second flip-flop which causes the opening of the transistor Ti3 also leads the second generator 5,6 to supply the terminals 2,56 of the lamp with a current I l (FIG. 7c, arrow 67) formed as already described by an alternation of two currents i l1 and i l2 .
  • a holding voltage U l is then established at the terminals of the lamp (end of FIG. 7f).
  • the same second generator is used to supply the filament of the lamp first for a certain time, then to maintain the arc current in this lamp.
  • This system leads to the use of means which are much less expensive and cumbersome than the well-known heavy ballast which must be used today for the supply of fluorescent tubes used for lighting.
  • FIG 8 is a detailed diagram of this second variant. Compared to the first variant ( Figure 6), this arrangement is essentially distinguished by the addition of a comparator 106 and a third flip-flop of type D 105 and by the elimination of the time constant R3C.
  • the terminal 55 of the lamp 1 is connected to the + of the comparator 106, the - terminal of this comparator receiving a reference voltage U ref .
  • the output 108 of the comparator is connected to the input Cl of the third flip-flop 105.
  • the input D of this flip-flop is connected to the logic 1 (in this case at the voltage - U1 + 12 V).
  • the output Q 109 is connected to the input D of the second flip-flop 53 via a transistor Ti5 both an inverter and a voltage converter. In this second variant it is the exit Q 107 of the second flip-flop which is connected to the transistor Ti4.
  • the input D 58 of the flip-flop 53 is at logic level 1 (0 V).
  • the exit Q 107 of the flip-flop 53 is also at level 0, the transistor Ti4 conducts and supplies a base current to the transistor Ti3 which also conducts.
  • the filament 56 is then energized and is supplied by the same second generator 5,6 which has been described above (see FIG. 9a).
  • the current I f in the filament is made up of a succession of currents i f1 supplied by the circuit 5 and currents i f2 supplied by the circuit 6 (see beginning of FIG. 9f).
  • the lamp 1 is then short-circuited by Ti3 and the voltage U1 between the terminals 2 and 55 is zero (see beginning of Figure 9h).
  • the voltage U f on the filament 56 increases progressively as shown in line b of FIG. 9. This increase is due to the increase in the resistance of the filament, which is a consequence of its heating. .
  • the output 108 of the comparator 106 goes from the low level to the high level indicated by the rising edge 110 (arrow 111, FIG. 9c).
  • the flank 110 in turn causes the flip-flop to tip over 105 and the exit Q 109 from the low level to the high level which brings the rising flank 112 (arrow 113, FIG. 9d) since the input D of the flip -flop 105 is at logic level 1.
  • the reference voltage U ref can be chosen at 12 volts and that the comparator can be of the 74C909 type.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (7)

1. Speiseanordnung einer Entladungslampe (1) mit einem ersten Generator (4) zum Liefern eines Spannungsimpulses für das Zünden der Entladung in der Lampe und mit einem zweiten Generator zum Aufrechterhalten eines Entladestromes in der Lampe, welcher zweite Generator eine erste elektrische Schaltung (5) umfaßt mit einer Serienschaltung einer Gleichspannungsquelle (U₁), eines ersten Unterbrechers (I₁) und eines zweiten Unterbrechers (I₂), welcher erste und zweite Unterbrecher derart angeordnet sind, daß bei geschlossenem ersten der zweite offen ist und umgekehrt, und eine zweite elektrische Schaltung (6) umfaßt mit der Serienschaltung einer Induktivität (L) und der Lampe, parallelgeschaltet dem zweiten Unterbrecher, wobei die Unterbrecher von einer ersten Steuervorrichtung (7) betätigt sind, gespeist von einem Wechselsignal der festen Periodendauer T₁, wobei die erste Steuervorrichtung ausgebildet ist zum Liefern eines zum alternativen Kommutieren des ersten Unterbrechers zunächst, während einer ersten Zeitdauer Ta, in den Schließzustand und danach, während einer zweiten Zeitdauer Tb, in den Offenzustand geeigneten Signals an ihren Ausgang (15), dadurch gekennzeichnet, daß der erste Generator einen dritten Unterbrecher (I₃) parallel zu den Klemmen (2, 3) der Lampe geschaltet umfaßt, der von einer zweiten Steuervorrichtung (53) betätigt ist, welche ihrerseits von der ersten Steuervorrichtung (7) betätigt ist, welche zweite Vorrichtung derart ausgebildet ist, daß der dritte Unterbrecher geschlossen wird beim Einschalten der Speiseanordnung und sich öffnet beim ersten Mal, wenn der erste Unterbrecher (I₁) vom Schließ- in den Offenzustand übergeht.
2. Speiseanordnung nach Anspruch 1, dadurch gekennzeichnet, daß der erste Unterbrecher (I₁) ein erster, von der ersten Steuervorrichtung gesteuerter Transistor (Ti1) ist, daß der zweite Unterbrecher (I₂) eine derart angeschlossene Diode (D1) ist, daß sie nichtleitend ist bei geschlossenem ersten Unterbrecher, daß die erste Steuervorrichtung (7) ein D-Flipflop ist, der an seinem Takteingang (8) mit dem Wechselsignal der festen Periodendauer T₁ von einem Oszillator (9) gespeist ist, daß der Transistor (Ti1) an seiner Basis vom Q-Ausgang (15) des Flipflops angesteuert ist, während sein Kollektor bzw. sein Emitter mit der Diode (D1) bzw. der Spannungsquelle (U₁) verbunden sind, wobei die Q- und die D-Klemme des Flipflops miteinander verbunden sind, daß der dritte Unterbrecher (I₃) ein von der zweiten Steuervorrichtung (53) gesteuerter zweiter Transistor (Ti3) ist, daß die zweite Steuervorrichtung ein zweiter D-Flipflop ist, an seinem Takteingang (C1) von dem am Q-Ausgang des ersten Flipflops anstehenden Signal gespeist, und daß der zweite Transistor von dem am Q-Ausgang des zweiten Flipflops anstehenden Signal gesteuert ist.
3. Speiseanordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Entladungslampe (1) mit einer ersten, kalten Elektrode (2) und einer zweiten, mit einer Wendel (56) versehenen Elektrode ausgestattet ist, welche Wendel mit einer ersten (54) und einer zweiten (55) Klemme verbunden ist, daß die zweite elektrische Schaltung (6) die Serienschaltung der Induktivität (L) und der Lampe (1) über ihre erste, kalte Elektrode (2) und die erste Klemme (54) ihrer Wendel (56) umfaßt, daß der dritte Unterbrecher (I₃) einerseits an die erste, kalte Elektrode (2) und andererseits an die zweite Klemme (55) der Wendel angeschlossen ist, und daß der zweite Generator zum Aufheizen der Wendel (56) während einer Periodendauer Td ausgebildet ist, nach welcher der dritte Unterbrecher (I₃) sich öffnet, welches Öffnen erfolgt, wenn der erste Unterbrecher (I₁) nach der Periodendauer Td erstmals vom Schließ- in den Offenzustand übergeht.
4. Speiseanordnung nach Anspruch 3, dadurch gekennzeichnet, daß die Periodendauer Td vorgegeben ist.
5. Speiseanordnung nach Anspruch 3, dadurch gekennzeichnet, daß die Periodendauer Td von einem Komparator definiert ist, der an seinem ersten Eingang die über den Klemmen der Wendel (56) entwickelte Spannung und an seinem zweiten Eingang eine Referenzspannung empfängt, wobei die Periodendauer Td endet, wenn die genannten Spannungen gleich sind.
6. Speiseanordnung nach Anspruch 3, dadurch gekennzeichnet, daß der erste Unterbrecher (I₁) ein erster, von der ersten Steuervorrichtung (7) gesteuerter Transistor (Ti1) ist, daß der zweite Unterbrecher (I₂) eine derart geschaltete Diode (D1) ist, daß sie nichtleitend ist, wenn der erste Unterbrecher geschlossen ist, und daß der dritte Unterbrecher (I₃) ein zweiter, von der zweiten Steuervorrichtung (53) gesteuerter Transistor (Ti3) ist.
7. Speiseanordnung nach Anspruch 6, dadurch gekennzeichnet, daß die erste Steuervorrichtung (7) ein an seinem Takteingang (8) mit dem Wechselsignal fester Periodendauer T₁ gespeister D-Flipflop ist, daß der erste Transistor (Ti1) an seiner Basis vom Q-Ausgang (15) des ersten Flipflops gesteuert ist, während der Kollektor bzw. Emitter des ersten Transistors mit der Diode (D1) bzw. der Spannungsquelle (U₁) verbunden sind, und daß die zweite Steuervorrichtung (53) ein zweiter, an seinem Takteingang (C1) von dem am Q-Ausgang des ersten Flipflops anstehenden Signal gespeister D-Flipflop ist, wobei die Periodendauer Td in Form eines Signals korrespondierend zum D-Eingang (58) des zweiten Flipflops (53) vorliegt, und daß der zweite Transistor (Ti3) von dem am Q-Ausgang (57) des zweiten Flipflops anstehenden Signal gesteuert ist über einen Verstärker/Inverter (Ti4), wobei der Kollektor bzw. Emitter des zweiten Transistors mit der ersten, kalten Elektrode (2) bzw. der zweiten Klemme (55) der Wendel (56) der Lampe verbunden sind.
EP88109921A 1987-06-26 1988-06-22 Speiseanordnung für eine Entladungslampe Expired - Lifetime EP0296558B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR8709109A FR2617363A1 (fr) 1987-06-26 1987-06-26 Dispositif d'alimentation d'une lampe a decharge
FR8709109 1987-06-26
SG126894A SG126894G (en) 1987-06-26 1994-08-27 Power supply device for a discharge lamp

Publications (2)

Publication Number Publication Date
EP0296558A1 EP0296558A1 (de) 1988-12-28
EP0296558B1 true EP0296558B1 (de) 1991-08-28

Family

ID=26226062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88109921A Expired - Lifetime EP0296558B1 (de) 1987-06-26 1988-06-22 Speiseanordnung für eine Entladungslampe

Country Status (6)

Country Link
US (1) US4912375A (de)
EP (1) EP0296558B1 (de)
CA (1) CA1282452C (de)
DE (1) DE3864459D1 (de)
FR (1) FR2617363A1 (de)
SG (1) SG126894G (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2658506B2 (ja) * 1990-06-06 1997-09-30 三菱電機株式会社 希ガス放電蛍光ランプ装置
DE4101980A1 (de) * 1991-01-24 1992-08-06 Trilux Lenze Gmbh & Co Kg Wechselspannungs-vorschaltgeraet fuer elektrische entladungslampen
US5854539A (en) * 1997-08-26 1998-12-29 Stmicroelectronics, Inc. Electroluminescent lamp driver circuit with signal tracking
US5886423A (en) * 1997-09-10 1999-03-23 Leviton Manufacturing Co., Inc. Electric series circuit
US6323603B1 (en) * 1998-02-18 2001-11-27 Nicollet Technologies Corporation Resonant flyback ignitor circuit for a gas discharge lamp control circuit
US6246187B1 (en) * 1999-05-20 2001-06-12 Nsi Enterprises, Inc. System for promoting passive end of life light source failure
US6911789B2 (en) * 2003-03-04 2005-06-28 Kaufman & Robinson, Inc. Power supply for a hot-filament cathode
US7390417B2 (en) * 2004-03-19 2008-06-24 Meridian Design, Inc. Portable ultraviolet water purification system
US7843138B2 (en) * 2008-06-11 2010-11-30 Kaufman & Robinson, Inc. Power supply for a hot-filament cathode
US20110174993A1 (en) * 2010-01-18 2011-07-21 Camelbak Products, Llc Water purifying drink containers
US8872130B1 (en) 2012-03-19 2014-10-28 Meridian Design, Inc. UVC water purifier system and method
USD707124S1 (en) 2012-04-02 2014-06-17 Camelbak Products, Llc Bottle cap
US9212067B2 (en) 2012-05-30 2015-12-15 Flozinc, Llc Water bottle with flow meter
US8975596B1 (en) 2012-07-20 2015-03-10 Meridian Design, Inc. Water purifying drink containers

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1366032A (fr) * 1963-05-03 1964-07-10 Thomson Houston Comp Francaise Dispositif pour le fonctionnement des appareils à décharge électrique
US3890537A (en) * 1974-01-02 1975-06-17 Gen Electric Solid state chopper ballast for gaseous discharge lamps
US4101809A (en) * 1977-05-26 1978-07-18 General Electric Company Discharge lamp operating circuit
NL8104200A (nl) * 1981-09-11 1983-04-05 Philips Nv Elektrische schakeling voor het bedrijven van een gas- en/of dampontladingslamp.
FR2559334B1 (fr) * 1984-02-03 1988-02-26 Ssih Equipment Sa Dispositif d'alimentation pour commander l'intensite lumineuse d'au moins une lampe a decharge et utilisation dudit dispositif

Also Published As

Publication number Publication date
DE3864459D1 (de) 1991-10-02
FR2617363A1 (fr) 1988-12-30
CA1282452C (en) 1991-04-02
SG126894G (en) 1995-03-17
US4912375A (en) 1990-03-27
FR2617363B1 (de) 1995-02-24
EP0296558A1 (de) 1988-12-28

Similar Documents

Publication Publication Date Title
EP0288924B1 (de) Leistungsversorgung für eine Entladungslampe
EP0296558B1 (de) Speiseanordnung für eine Entladungslampe
CH684139A5 (fr) Bloc d'alimentation électrique à impulsions.
EP0066481A1 (de) Elektronisches Speisegerät für Entladungslampen
FR2505601A1 (de)
FR2775414A1 (fr) Dispositif pour commander l'allumage d'une lampe a decharge et circuit formant pont en h destine a etre utilise dans un tel dispositif
FR2538667A1 (fr) Unite d'eclairage a source lumineuse d'appoint et reseau de fonctionnement perfectionne
EP0390699A1 (de) Versorgungsschaltung einer Bogenlampe, insbesondere eines Automobilscheinwerfers
NL8203719A (nl) Verlichtingseenheid.
EP0918449A1 (de) Schaltung zur Steuerung einer Leuchtstofflampe
FR2621751A1 (fr) Procede de production d'une basse tension continue stabilisee
EP3345456B1 (de) Elektronischer wandler und beleuchtungssystem mit solch einem wandler
WO1990011005A1 (fr) Dispositif electronique de demarrage et d'alimentation pour tubes fluorescents a electrodes prechauffables
EP1120019B1 (de) Steuerschaltung für eine wechselspannungsgespeiste last
LU83920A1 (fr) Dispositif de demarrage pour lampes a decharge
FR2645392A1 (fr) Circuit d'alimentation d'une lampe a arc, notamment pour un projecteur de vehicule automobile
FR2461429A1 (fr) Perfectionnement apporte aux convertisseurs de frequence utilises pour l'allumage et l'alimentation d'une lampe a decharge
FR2776887A1 (fr) Dispositif pour l'alimentation d'une lampe a decharge de projecteur de vehicule automobile
EP0063507A1 (de) Elektronischer Starter für Fluoreszenzlampen, mit einem, mit einem Überspannungsschaltkreis und einem Vorwärmstromkreis zusammenwirkenden Zeitverzögerungsstromkreis
FR2488095A1 (fr) Starter electronique pour lampe fluorescente
FR2522458A1 (fr) Dispositif d'allumage d'une lampe a tube d'eclairage fluorescent et lampe ainsi equipee
FR2496383A1 (fr) Circuit pour l'allumage et la commande graduelle d'une lampe fluorescente
CH570096A5 (en) Two-terminal fluorescent lamp starter - has threshold trigger cct. delivering control pulses to bidirectional-conduction electronic switch
FR2492211A1 (fr) Appareil generateur de lumiere-eclair electrique
BE543815A (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE GB IT LI

17P Request for examination filed

Effective date: 19890109

17Q First examination report despatched

Effective date: 19901120

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE GB IT LI

REF Corresponds to:

Ref document number: 3864459

Country of ref document: DE

Date of ref document: 19911002

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040526

Year of fee payment: 17

Ref country code: CH

Payment date: 20040526

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20040602

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050622

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050622

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060103

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20050622