JP2001284080A - Discharge lamp lighting device, bulb-shaped fluorescent lamp and illuminator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device with a small loss and short start time. SOLUTION: Alternating current voltage of a commercial alternating current power source e is full-wave rectified by a rectifier circuit 1 and filtered by the first capacitor C1. As the second capacitor C2 is not charged at starting, current flows through the path of the first driving resistor R1, the second driving resistor R2, the second diode D2, an inductor L1, and the second capacitor C2. Divided voltage by the first driving resistor R1 and the second driving resistor R2 is impressed to the gate of the first field effect transistor Q1. The first field-effect transistor Q2 is turned on when the divided voltage by the first driving resistor R1 and the second driving resistor R2 exceed the threshold voltage of the first field-effect transistor Q1. A fluorescent lamp L1 is lighted at high frequency by the alternating on-off operation of the first and the second field-effect transistors Q1, Q2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device, a bulb-type fluorescent lamp, and an illuminating device whose startup time is shortened.

[0002]

2. Description of the Related Art Conventionally, as a discharge lamp lighting device of this type, for example, a configuration shown in FIG. 8 is known.

In the discharge lamp lighting device shown in FIG. 8, a rectifier circuit 1 as a full-wave rectifier is connected to a commercial AC power supply e, and a so-called partial smoothing circuit 2 is connected to the rectifier circuit 1. In the partial smoothing circuit 2, a first capacitor C1 is connected in parallel to a commercial AC power supply e, and an inductor and a first capacitor C1 are connected to the first capacitor C1 from the high potential side to the reference potential side. A second capacitor C2 having a large capacity and a first diode D1 having a polarity for reversely blocking the voltage of the rectifier circuit 1 are connected in series, and a second capacitor is connected to a connection point of the capacitor C2 and the first diode D1.
One end of a second diode D2 having a polarity to charge C2 is connected.

The partial smoothing circuit 2 is connected to a self-excited half-bridge type inverter circuit 3 serving as DC-AC conversion means, and the inverter circuit 3 serves as a pair of switching means located on the high potential side. A series circuit of a first field-effect transistor Q1 and a second field-effect transistor Q2 on the reference potential side is connected, and a connection point of the first field-effect transistor Q1 and the second field-effect transistor Q2 is connected to a second diode. The other end of D2 is connected.

Further, between the drain and the source of the first field effect transistor Q1, a first starting resistor R1 and a second starting resistor R1 are connected.
Are connected in series, and the connection point between the first and second start-up resistors R1 and R2 is connected to the gate of the first field-effect transistor Q1, and the second field-effect transistor Q2 A third startup resistor R3 is connected between the source and the drain of the third transistor.

A load circuit 4 is connected between the drain and the source of the second field effect transistor Q2. The load circuit 4 includes a choke coil L2 and a DC cut capacitor.
One ends of filaments FLa and FLb of a fluorescent lamp FL as a discharge lamp are connected via C3, and filaments FLa and FLb
Is connected to a start capacitor C4.

Further, a first field effect transistor
The drive circuit 5 is connected to Q1 and the second field-effect transistor Q2. In the drive circuit 5, a capacitor C5, an inductor L3, and an inductor L4 magnetically connected to the choke coil L2 are connected in series between the gate and the source of the first field effect transistor Q1. Also, the series circuit of the inductor L3 and the inductor L4 includes:
The parallel circuit of the primary winding Tr1 of the transformer Tr and the capacitor C6 is connected in parallel. Further, a secondary winding Tr2 of the transformer Tr is connected between the gate and the drain of the field-effect transistor Q2, and the transformer Tr allows the first field-effect transistor Q1 and the second field-effect transistor Q2
Are turned on and off alternately.

The AC voltage of the commercial AC power supply e is full-wave rectified by the rectifier circuit 1 and a current flows through the first capacitor C1. At the time of startup, the second capacitor C2 is not charged. No potential is generated in the first starting resistor R1 and the second starting resistor R2 which are parallel to the series circuit of the second capacitor C2 and the second diode D2,
No voltage for turning on the gate of the first field-effect transistor Q1 is applied, and the first field-effect transistor Q does not turn on.

Thereafter, the rectifier circuit 1, the inductor L1, the second
Capacitor C2, second diode D2, third startup resistor
In the closed circuit of R3 and the rectifier circuit 1, the second capacitor C2 is charged. When the second capacitor C2 is charged, the potentials of the first startup resistor R1 and the second startup resistor R2 also increase, and the first startup resistor R1 applied to the gate of the first field effect transistor Q1 When the divided voltage of the second starting resistor R2 exceeds the threshold voltage of the first field effect transistor Q1, the first field effect transistor Q1 is turned on.

Thus, the first field-effect transistor
When Q1 turns on, the choke coil L of the load circuit 4
2. Current flows through the closed circuit of capacitor C3 and capacitor C4. Then, a voltage is generated in the inductor L4 magnetically connected to the choke coil L2, and the first field-effect transistor Q1 is kept on by the resonance action of the inductor L3 and the capacitor C6 of the drive circuit 5. Thereafter, since the direction of the current of the choke coil L2 is reversed by the resonance action, the current flowing through the primary winding Tr1 of the transformer Tr is reversed, and the first field-effect transistor Q1 is turned off.
After the field effect transistor Q1 is turned off, a voltage is applied to the gate of the second field effect transistor Q2 by the secondary winding Tr2 of the transformer Tr to turn on the second field effect transistor Q2, and the primary winding of the transformer Tr is turned on. The first field-effect transistor Q1 and the second field-effect transistor Q2 are alternately turned on and off by the Tr1 and the secondary winding Tr2, a high-frequency voltage is applied to the fluorescent lamp FL, and the capacitor C4
When the resonance voltage flowing through the lamp rises above a predetermined value, the fluorescent lamp is started and turned on.

Thereafter, a resonance current due to resonance of the first capacitor C1, the second capacitor C2, and the inductor L1 of the partial smoothing circuit 2 is superimposed on the non-smooth rectification current from the rectification circuit 1, and the idle period of the input current To reduce harmonics.

[0012]

[0008] However, in the case of the conventional example shown in FIG.
1, a current flows through the second capacitor C2, the second diode D2, the third starting resistor R3, and the closed circuit of the rectifier circuit 1.

Here, the resistance value of the third startup resistor R3 is set high in order to reduce the loss after startup, and FIG.
As shown in (2), it takes time to charge the second capacitor C2, and it takes time to start the start.

On the other hand, if the resistance value of the third startup resistor R3 is reduced, the startup is quicker, but the third startup resistor R3 after the startup is started.
There is a problem that the loss increases due to the current flowing through R3.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a discharge lamp lighting device, a bulb-type fluorescent lamp, and a lighting device that start immediately after power is turned on without increasing loss. I do.

[0016]

According to a first aspect of the present invention, there is provided a discharge lamp lighting device comprising: a rectifier for rectifying a voltage of an AC power supply; a first capacitor connected in parallel to the rectifier;
A second series circuit of a second capacitor and an inductor, and a first diode connected in polarity to discharge the second capacitor in series with the series capacitor; and a first diode connected in parallel with the first capacitor. Switching means connected in series with each other and having a control terminal; and a connection point between the series circuit of the second capacitor and the inductor and the first diode, and a connection point of the paired switching means. A second diode connected to the second capacitor and connected to a polarity for charging the second capacitor; and a second diode located on a path for charging the second capacitor and connected between the control terminal of the one switching means and both terminals. A first and a second starting resistance; and a third starting resistance connected between both terminals of the other switching means to which the discharge lamp is connected in parallel. At the time of start-up, current flows through the series circuit of the second capacitor and the inductor, the second diode, and the path of the first and second start-up resistors, and the second capacitor is not sufficiently charged Even in the state, since the voltage divided by the first and second starting resistors is applied to the control terminal of the first switching unit, the first switching unit is started by the first starting resistor and the second starting unit. Since the first switching means is set by the voltage dividing ratio of the resistors, the first switching means can be turned on in a short time after the starting without lowering the resistance value of the first and second starting resistors and lowering the efficiency of the circuit. The rising is improved without reducing the wave and increasing the loss of the circuit.

A discharge lamp lighting device according to a second aspect of the present invention includes a rectifier for rectifying the voltage of the AC power supply; a first capacitor connected in parallel to the rectifier; a rectifier connected in parallel to the first capacitor; A series circuit of a second capacitor and an inductor located on the reference potential side of the rectifying means, and a first diode connected to the polarity discharging the second capacitor in series on the high potential side of the series circuit; A switching means connected in parallel to the first capacitor, a discharge lamp connected to the reference potential side, a control terminal, and a pair connected in series; a series circuit of a second capacitor and an inductor and a first diode A second diode connected between the connection point of the switching means and the connection point of the pair of switching means, and connected to the polarity for charging the second capacitor; And a first and a second starting resistor respectively connected between a control terminal of the switching means and the two terminals. The first and second starting resistors, the second diode, and the second The current flows through the path of the series circuit of the capacitor and the inductor, and even if the second capacitor is not sufficiently charged, the first
The voltage divided by the first and second starting resistors is applied to the control terminal of the switching means, and the activation of the first switching means is set by the voltage dividing ratio of the first starting resistance and the second starting resistance. Therefore, the first and second start-up resistances can be reduced in resistance by reducing the resistance value of the first and second start-up resistors without lowering the efficiency of the circuit.
Since the switching means can be turned on in a short time after the start-up, harmonics can be reduced and rise can be improved without increasing circuit loss.

A discharge lamp lighting device according to a third aspect of the present invention includes a rectifier for rectifying the voltage of an AC power supply; a first capacitor connected in parallel to the rectifier; a rectifier connected in parallel to the first capacitor; A series circuit of a second capacitor and an inductor located on a high potential side of the rectifying means, and a first diode connected to a polarity for discharging the second capacitor in series with a reference potential side of the series circuit; A switching means connected in parallel to the first capacitor and having a control terminal connected in parallel with a discharge lamp on the high potential side and having a pair connected in series; a series circuit of the second capacitor and the inductor; A second diode connected between the connection point of the diode and the connection point of the pair of switching means and connected to the polarity for charging the second capacitor; And a first and a second starting resistor respectively connected between the control terminal and both terminals of the switching means to be placed, and a series circuit of a second capacitor and an inductor, a second diode at the time of starting, and A current flows through the paths of the first and second starting resistors;
Even when the second capacitor is not sufficiently charged, the voltage divided by the first and second starting resistors is applied to the control terminal of the first switching means, and the first switching means is activated by the first switching means. Since the voltage is set by the voltage dividing ratio of the first starting resistor and the second starting resistor, after the first switching means is started without lowering the resistance value of the first and second starting resistors and lowering the efficiency of the circuit. Can be turned on in a short time, so that the harmonics can be reduced and the rise can be improved without increasing the circuit loss.

According to a fourth aspect of the present invention, there is provided a discharge lamp lighting device comprising: a rectifier for rectifying a voltage of an AC power supply; and a second rectifier connected in series from a reference potential side to a higher potential side between both terminals of the rectifier. A capacitor, an inductor, and a first diode connected to a polarity to discharge a second capacitor;
A first capacitor connected in parallel to the second diode and the inductor; connected between both terminals of the rectifying means, a discharge lamp is connected to the reference potential side, and a pair having a control terminal and forming a pair in series. Connected switching means; and a second diode connected between the connection point of the second diode and the inductor and the connection point of the paired switching means and connected to the polarity for charging the second capacitor. A control terminal of the switching means located on the high potential side and first and second start-up resistors respectively connected between both terminals, the first and second start-up resistances at the time of start-up; A current flows in a path of a series circuit of the diode and the second capacitor and the inductor, and even if the second capacitor is not sufficiently charged, the first current flows.
The voltage divided by the first and second starting resistors is applied to the control terminal of the switching means, and the activation of the first switching means is set by the voltage dividing ratio of the first starting resistance and the second starting resistance. Therefore, the first and second start-up resistances can be reduced in resistance by reducing the resistance value of the first and second start-up resistors without lowering the efficiency of the circuit.
Since the switching means can be turned on in a short time after the start-up, harmonics can be reduced and rise can be improved without increasing circuit loss.

A discharge lamp lighting device according to a fifth aspect of the present invention includes a rectifier for rectifying the voltage of the AC power supply; a second rectifier connected in series from the high potential side to the reference potential side between both terminals of the rectifier. A capacitor, an inductor, and a first diode connected to a polarity to discharge a second capacitor;
A first capacitor connected in parallel to the second diode and the inductor; connected between both terminals of the rectifier, a discharge lamp connected in parallel to the high potential side, having a control terminal, forming a pair. A second switching means connected in series; a second diode and an inductor connected between a connection point of the paired switching means and a second connection connected to a polarity for charging the second capacitor. A diode; and a control terminal of the switching means located on the reference potential side and first and second starting resistors respectively connected between the terminals, and a series circuit of a second capacitor and an inductor at the time of starting, A current flows in a path of the second diode and the first and second starting resistors, and the first switch is provided even when the second capacitor is not sufficiently charged. A voltage divided by the first and second starting resistors is applied to the control terminal of the switching means, and the starting of the first switching means is set by a voltage dividing ratio of the first starting resistor and the second starting resistor. Therefore, the first switching means can be turned on in a short time after starting without lowering the resistance value of the first and second starting resistances and lowering the efficiency of the circuit. The rise is improved without increasing the loss.

According to a sixth aspect of the present invention, there is provided a discharge lamp lighting device according to any one of the first to fifth aspects, wherein the pair of switching means are complementary, and the pair of switching means are complementary. The use of the mold facilitates the control for alternately turning on and off.

According to a seventh aspect of the present invention, there is provided a bulb-type fluorescent lamp comprising: the discharge lamp lighting device according to any one of the first to sixth aspects; and a fluorescent lamp which is a discharge lamp to be lighted by the discharge lamp lighting device. And perform their respective functions.

According to an eighth aspect of the present invention, there is provided an illuminating apparatus comprising: the discharge lamp lighting device according to any one of the first to sixth aspects; and a fixture body for mounting the discharge lamp to be lit by the discharge lamp lighting device. And exert their respective effects.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bulb-type fluorescent lamp according to an embodiment of the present invention. FIG.
The same reference numerals are given to portions corresponding to the conventional example shown in FIG.

FIG. 1 is a circuit diagram showing a discharge lamp lighting device, and FIG.
FIG. 2 is a side view showing a part of the appearance of the bulb-type fluorescent lamp as seen through.

In FIG. 2, reference numeral 11 denotes a bulb-type fluorescent lamp.
The bulb-type fluorescent lamp 11 includes a cover 13 having an E26-type base 12, a translucent globe 14, an arc tube 15 forming a fluorescent lamp FL as a discharge lamp housed in the globe 14, and a cover 13. Discharge lamp lighting device housed in
Has 16 The envelope 17 composed of the cover 13 and the globe 14 is, for example, JIS C7501.
Of the general lighting bulb defined in the above.

First, the cover 13 has a cover body 21 formed of a heat-resistant synthetic resin such as polybutylene terephthalate (PBT). This cover body 21
It has a substantially cylindrical shape that expands in the direction of the glove 14, and has a lower end covered with a base 12 such as an E26 shape and fixed by bonding or caulking.

The globe 14 is transparent or milky white having a light diffusing property and is formed of glass or synthetic resin into a smooth curved surface having substantially the same shape as a glass bulb of a general lighting bulb. The portion is fitted and fixed inside the opening at the upper end of the cover 13. The globe 14 can be combined with another member such as a diffusion film to improve the uniformity of luminance.

The discharge lamp lighting device 16 is mounted on a disk-shaped circuit board 22 arranged horizontally, that is, perpendicular to the longitudinal direction of the arc tube 15.

The arc tube 15 has a bulb 24. The bulb 24 has three tubes 25 which are formed in a substantially U-shape which is smoothly curved at an intermediate portion. , Tube 25
The spaces are communicated and connected by a communication pipe 26. Then, in a state where the bulb 31 is incorporated in the bulb-type fluorescent lamp 11, the respective tubes 25 are positioned at equal intervals on one circumference centered on the central axis which is the longitudinal direction of the bulb-type fluorescent lamp 11. ,
It is arranged corresponding to each side of the sectional triangle.

In the discharge lamp lighting device 16, as shown in FIG. 1, a rectifier circuit 1 as a full-wave rectifier is connected to a commercial AC power source e, and a so-called partial smoothing circuit 2 is connected to the rectifier circuit 1. ing. In the partial smoothing circuit 2, a first capacitor C1 is connected in parallel to a commercial AC power supply e, and the first capacitor C1 reversely blocks the voltage of the rectifier circuit 1 from the high potential side to the reference potential side. A first diode D1, an inductor L1, and a second capacitor C2 having a larger capacity than the first capacitor C1 are connected in series, and a connection point of the second capacitor C2 and the first diode D1 has the following polarity: One end of a second diode D2 having a polarity in the direction of charging the second capacitor C2 is connected.

The partial smoothing circuit 2 is connected to a self-excited half-bridge type inverter circuit 3 serving as DC-AC conversion means, and this inverter circuit 3 serves as a pair of switching means located on the high potential side. A series circuit of a first field-effect transistor Q1 and a second field-effect transistor Q2 on the reference potential side is connected, and a connection point of the first field-effect transistor Q1 and the second field-effect transistor Q2 is connected to a second diode. The other end of D2 is connected.

Further, between the drain and the source of the first field effect transistor Q1, a first starting resistor R1 and a second
Are connected in series, and the connection point between the first and second start-up resistors R1 and R2 is connected to the gate of the first field-effect transistor Q1, and the second field-effect transistor Q2 A third startup resistor R3 is connected between the source and the drain of the third transistor.

A load circuit 4 is connected between the drain and the source of the second field effect transistor Q2. The load circuit 4 includes a choke coil L2 and a DC cut capacitor.
One ends of filaments FLa and FLb of a fluorescent lamp FL as a discharge lamp are connected via C3, and filaments FLa and FLb
Is connected to a start capacitor C4.

Still further, a first field effect transistor
The drive circuit 5 is connected to Q1 and the second field-effect transistor Q2. In the drive circuit 5, a capacitor C5, an inductor L3, and an inductor L4 magnetically connected to the choke coil L2 are connected in series between the gate and the source of the first field effect transistor Q1. Also, the series circuit of the inductor L3 and the inductor L4 includes:
The parallel circuit of the primary winding Tr1 of the transformer Tr and the capacitor C6 is connected in parallel. Further, a secondary winding Tr2 of the transformer Tr is connected between the gate and the drain of the field-effect transistor Q2, and the transformer Tr allows the first field-effect transistor Q1 and the second field-effect transistor Q2
Are turned on and off alternately.

Next, the operation of the discharge lamp lighting device 16 of the embodiment shown in FIG. 1 will be described.

First, the AC voltage of the commercial AC power supply e is full-wave rectified by the rectifier circuit 1, and a current flows through the first capacitor C1. At the time of startup, the second capacitor C2 is not charged. Starting resistor R1, second starting resistor R2, second diode D2, inductor L1, second capacitor C2
The current flows through the path. Then, the divided voltage of the first starting resistor R1 and the second starting resistor R2 is applied to the gate of the first field effect transistor Q1, and as shown in FIG. 3, the first starting resistor R1 and the second starting resistor R1 When the divided voltage of the resistor R2 exceeds the threshold voltage of the first field effect transistor Q1, the first field effect transistor Q1 is turned on. That is, even when the second capacitor C2 is not charged as in the related art, when the divided voltages of the first starting resistor R1 and the second starting resistor R2 increase, the first field effect transistor Q1 is turned on. Therefore, the inverter circuit 3 can be started in a short time. Further, there is no possibility that the resistance values of the first starting resistor R1 and the second starting resistor R2 are reduced to reduce circuit loss.

As described above, the first field-effect transistor
When Q1 turns on, the choke coil L of the load circuit 4
2. Current flows through the closed circuit of capacitor C3 and capacitor C4. Then, a voltage is generated in the inductor L4 magnetically connected to the choke coil L2, and the first field-effect transistor Q1 is kept on by the resonance action of the inductor L3 and the capacitor C6 of the drive circuit 5. Thereafter, since the direction of the current of the choke coil L2 is reversed by the resonance action, the current flowing through the primary winding Tr1 of the transformer Tr is reversed, and the first field-effect transistor Q1 is turned off.
After the field effect transistor Q1 is turned off, a voltage is applied to the gate of the second field effect transistor Q2 by the secondary winding Tr2 of the transformer Tr to turn on the second field effect transistor Q2, and the primary winding of the transformer Tr is turned on. The first field-effect transistor Q1 and the second field-effect transistor Q2 are alternately turned on and off by the Tr1 and the secondary winding Tr2, a high-frequency voltage is applied to the fluorescent lamp FL, and the capacitor C4
When the resonance voltage flowing through the lamp rises above a predetermined value, the fluorescent lamp is started and turned on.

Thereafter, the resonance current due to the resonance of the first capacitor C1, the second capacitor C2, and the inductor L1 of the partial smoothing circuit 2 is superimposed on the non-smooth rectified current from the rectifier circuit 1 as shown in FIG. In addition, the idle period of the input current is shortened to reduce harmonics.

The same effect can be obtained without connecting the third starting resistor R3.

Next, a discharge lamp lighting device according to another embodiment will be described with reference to FIG.

The discharge lamp lighting device 16 shown in FIG. 5 is basically the same as the discharge lamp lighting device 16 shown in FIG. 1, except that a load circuit is connected between both ends of the high potential side first field effect transistor Q1. 4, a first starting resistor R1 is connected between the source and the gate of the second field-effect transistor Q2 on the reference potential side,
A second starting resistor R2 is connected between the drain and the gate of the second field-effect transistor Q2, and a primary winding Tr1 of a transformer Tr is connected to the second field-effect transistor Q2,
The secondary winding Tr2 of the transformer Tr is connected to the first field effect transistor Q1. Further, a third startup resistor R3 is connected between the drain and the source of the first field-effect transistor Q1.

The basic operation is the same as that of the discharge lamp lighting device 16 shown in FIG. 1, but since the second capacitor C2 is not charged at the time of starting, the inductor L1, the second capacitor C2, and the second capacitor C2 are not charged. A current flows through a path of the diode D2, the first starting resistor R1, and the second starting resistor R2. And
The divided voltage of the first starting resistor R1 and the second starting resistor R2 is
Is applied to the gate of the field effect transistor Q1 to turn on the first field effect transistor Q1. Therefore, even when the discharge lamp lighting device 16 shown in FIG. 5 is in a state where the second capacitor C2 is not charged, when the partial pressure of the first starting resistor R1 and the second starting resistor R2 increases, the first Since the field effect transistor Q1 is turned on, the inverter circuit 3 can be started in a short time.

A discharge lamp lighting device according to another embodiment will be described with reference to FIG.

The discharge lamp lighting device 16 shown in FIG. 6 is basically the same as the discharge lamp lighting device 16 of the embodiment shown in FIG. 1, except that a first capacitor C1 is connected to a first diode D1.
It is connected between both ends of the inductor L1. The operation and effects are the same as those of the discharge lamp lighting device 16 of the embodiment shown in FIG.

A discharge lamp lighting device according to another embodiment will be described with reference to FIG.

The discharge lamp lighting device 16 shown in FIG. 7 is basically the same as the discharge lamp lighting device 16 of the embodiment shown in FIG. 5, except that the first capacitor C1 is connected to the inductor L1 and the first The operation and the effects are the same as those of the discharge lamp lighting device 16 of the embodiment shown in FIG.

By mounting the bulb-type fluorescent lamp 11 on a fixture main body having a socket for connecting a general lighting bulb, a lighting fixture can be constructed.

Further, by mounting a fluorescent lamp, which is a discharge lamp, on the fixture body and lighting the fluorescent lamp with a discharge lamp lighting device, a lighting fixture such as a stand can be constructed.

In each of the embodiments, the first
The polarity of the field-effect transistor Q1 and the second field-effect transistor Q2 may be made different from each other to make them complementary, and the configuration of the drive circuit 5 may be simplified.

[0051]

According to the discharge lamp lighting device of the first aspect, at the time of startup, a current flows through the series circuit of the second capacitor and the inductor, the second diode, and the path of the first and second startup resistors. Since the voltage divided by the first and second starting resistors is applied to the control terminal of the first switching means even when the second capacitor is not sufficiently charged, the first switching means Is set by the voltage dividing ratio of the first starting resistance and the second starting resistance, the first switching is performed without lowering the resistance value of the first and second starting resistances and lowering the efficiency of the circuit. Since the means can be turned on in a short time after the start, it is possible to reduce the harmonics and improve the rise without increasing the loss of the circuit.

According to the discharge lamp lighting device of the second aspect,
At the time of start-up, a current flows through a path of a series circuit of the first and second start-up resistors, the second diode, and the second capacitor and the inductor, and even if the second capacitor is not sufficiently charged, the first A voltage divided by the first and second starting resistors is applied to the control terminal of the switching means, and the first switching means is started by a voltage dividing ratio of the first starting resistor and the second starting resistor. So
Since the first switching means can be turned on in a short time after starting without lowering the resistance value of the first and second starting resistors and reducing the efficiency of the circuit, the harmonics are reduced and the loss of the circuit is increased. The rise can be improved without performing.

According to the discharge lamp lighting device of the third aspect,
At the time of start-up, a current flows through a path of the series circuit of the second capacitor and the inductor, the second diode, and the first and second start-up resistors, and even if the second capacitor is not sufficiently charged, the first A voltage divided by the first and second starting resistors is applied to the control terminal of the switching means, and the first switching means is started by a voltage dividing ratio of the first starting resistor and the second starting resistor. So
Since the first switching means can be turned on in a short time after starting without lowering the resistance value of the first and second starting resistors and reducing the efficiency of the circuit, the harmonics are reduced and the loss of the circuit is increased. The rise is improved without performing.

According to the discharge lamp lighting device of the fourth aspect,
At the time of start-up, a current flows through a path of a series circuit of the first and second start-up resistors, the second diode, and the second capacitor and the inductor, and even if the second capacitor is not sufficiently charged, the first A voltage divided by the first and second starting resistors is applied to the control terminal of the switching means, and the first switching means is started by a voltage dividing ratio of the first starting resistor and the second starting resistor. So
Since the first switching means can be turned on in a short time after starting without lowering the resistance value of the first and second starting resistors and reducing the efficiency of the circuit, the harmonics are reduced and the loss of the circuit is increased. The rise can be improved without performing.

According to the discharge lamp lighting device of the fifth aspect,
At the time of start-up, a current flows through a path of the series circuit of the second capacitor and the inductor, the second diode, and the first and second start-up resistors, and even if the second capacitor is not sufficiently charged, the first A voltage divided by the first and second starting resistors is applied to the control terminal of the switching means, and the first switching means is started by a voltage dividing ratio of the first starting resistor and the second starting resistor. So
Since the first switching means can be turned on in a short time after starting without lowering the resistance value of the first and second starting resistors and reducing the efficiency of the circuit, the harmonics are reduced and the loss of the circuit is increased. The rise can be improved without performing.

According to the discharge lamp lighting device of the sixth aspect,
In addition to the discharge lamp lighting device according to any one of the first to fifth aspects, by making the pair of switching means complementary, it is possible to easily control the turning on and off alternately.

According to a seventh aspect of the present invention, there is provided a fluorescent lamp which is a discharge lamp which is lit by the discharge lamp lighting device according to any one of the first to sixth aspects. The effect can be achieved.

According to the illuminating device of the eighth aspect, since there is provided the apparatus main body for mounting the discharge lamp to be lit by the discharge lamp lighting device of any one of the first to sixth aspects, each effect is provided. Can be played.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing one embodiment of a discharge lamp lighting device of the present invention.

FIG. 2 is a side view showing a part of the external appearance of the above-described light bulb-type fluorescent lamp as seen through;

FIG. 3 is a waveform chart showing an operation of the discharge lamp lighting device.

FIG. 4 is a waveform chart showing an input voltage and an input current according to the first embodiment;

FIG. 5 is a waveform diagram showing a discharge lamp lighting device according to another embodiment of the present invention.

FIG. 6 is a waveform diagram showing a discharge lamp lighting device according to another embodiment of the present invention.

FIG. 7 is a waveform diagram showing a discharge lamp lighting device according to still another embodiment of the present invention.

FIG. 8 is a circuit diagram showing a conventional discharge lamp lighting device.

FIG. 9 is a waveform chart showing an operation of the discharge lamp lighting device.

[Explanation of symbols]

1 Rectifier circuit as rectifier 16 Discharge lamp lighting device C1 First capacitor C2 Second capacitor D1 First diode D2 Second diode e Commercial AC power supply FL Fluorescent lamp as discharge lamp L1 Inductor Q1 As switching means First field-effect transistor Q2 Second field-effect transistor as switching means R1 First starting resistor R2 Second starting resistor

Continuation of the front page (72) Inventor Hideo Kozuka 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Toshiba Lighting & Technology Corporation F-term (reference) 3K072 AA02 AA05 BA03 BB04 BC01 CA16 CB02 DB03 GA02 GB12 GC02

Claims (8)

[Claims] Rectifying means for rectifying a voltage of an AC power supply;
A first capacitor connected in parallel with the rectifying means;
A first capacitor connected in parallel to the first capacitor and a series circuit of a second capacitor and an inductor, and a first diode connected in polarity to discharge the second capacitor in series with the series circuit; Switching means connected in parallel to each other and having a control terminal and connected in series with each other; a connection point of the series circuit of the second capacitor and the inductor and the first diode; and a connection point of the switching means forming a pair. A second diode connected between the first diode and the second diode and connected to a polarity that charges a second capacitor;
A lighting device for a discharge lamp, comprising: a control terminal of one of the switching means and a first and a second starting resistor respectively connected between a control terminal and both terminals of the switching means. 2. A rectifier for rectifying a voltage of an AC power supply;
A first capacitor connected in parallel with the rectifying means;
A series circuit of a second capacitor and an inductor connected in parallel to the first capacitor and located on the reference potential side of the rectifier, and a second series connected in series on the high potential side of the series circuit;
A first diode connected to the polarity for discharging the capacitor; a discharge lamp connected in parallel to the first capacitor, a discharge lamp connected in parallel to the reference potential side, a pair having a control terminal, and connected in series. Switching means; connected between a connection point of the series circuit of the second capacitor and the inductor and the first diode and a connection point of the paired switching means, and connected to a polarity for charging the second capacitor. A discharge lamp lighting device, comprising: a second diode; and a control terminal of the switching means located on the high potential side and first and second starting resistors respectively connected between both terminals. Rectifying means for rectifying the voltage of the AC power supply;
A first capacitor connected in parallel with the rectifying means;
A series circuit of a second capacitor and an inductor connected in parallel to the first capacitor and located on the high potential side of the rectifier; and a second series connected in series to the reference potential side of the series circuit.
A first diode connected to the polarity for discharging the capacitor; a discharge lamp connected in parallel to the first capacitor, a discharge lamp connected in parallel to the high potential side, a pair having a control terminal, and connected in series. Switching means; connected between a connection point of the series circuit of the second capacitor and the inductor and the first diode, and a connection point of the paired switching means, and connected to a polarity for charging the second capacitor. A discharge lamp lighting device, comprising: a second diode; and a control terminal of the switching means located on the reference potential side and first and second starting resistors respectively connected between both terminals. Rectifying means for rectifying the voltage of the AC power supply;
A second capacitor and an inductor connected in series between the two terminals of the rectifier from the reference potential side to the high potential side;
And a first diode connected to the polarity to discharge the second capacitor; a first capacitor connected in parallel to the second diode and the inductor; connected between both terminals of the rectifying means; A switching means connected to the reference potential side and having a control terminal and connected in series in a pair; between a connection point of the second diode and the inductor and a connection point of the switching means forming a pair; A second diode connected and connected to a polarity for charging a second capacitor; a first terminal and a second starting resistor respectively connected between a control terminal of the switching means located on the high potential side and both terminals; A discharge lamp lighting device comprising: 5. A rectifier for rectifying a voltage of an AC power supply;
A second capacitor and an inductor connected in series from the high potential side to the reference potential side between both terminals of the rectifier;
And a first diode connected to the polarity to discharge the second capacitor; a first capacitor connected in parallel to the second diode and the inductor; connected between both terminals of the rectifying means; A switching means having a discharge lamp connected in parallel to the high potential side and having a control terminal and connected in series in a pair; a connection point of the second diode and the inductor and a connection point of the switching means forming a pair; A second diode connected between the second diode and a polarity for charging a second capacitor; a first terminal and a second terminal respectively connected between the control terminal and both terminals of the switching means located on the reference potential side; A discharge lamp lighting device comprising: a resistor; 6. The discharge lamp lighting device according to claim 1, wherein the pair of switching means are complementary. 7. A bulb shape comprising: the discharge lamp lighting device according to any one of claims 1 to 6; and a fluorescent lamp which is a discharge lamp to be lighted by the discharge lamp lighting device. Fluorescent lamp. 8. An illumination, comprising: the discharge lamp lighting device according to claim 1; and a fixture main body on which a discharge lamp to be lighted by the discharge lamp lighting device is mounted. apparatus.