JPH10327584A - Power supply, fluorescent lamp and lighting equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply, fluorescent lamp and lighting equipment of a simple circuit configuration. SOLUTION: A resonance voltage generated by a resonance circuit, constituted of a capacitor C6 and an inductor L4 or by other methods, is applied to the gate of field effect transistors Q1, Q2. When the gate voltage becomes a positive specified value or above, the FET Q1 turns on and the drain current of the FET Q1 flows, but the FET Q2 turns off, thereby the source-drain voltage appears and the drain current of the FET Q2 does not flow. When the gate voltage becomes a negative specified value or below, the FET Q2 turns on and drain current of the FET Q2 flows and the FET Q1 turns off. By turning the FETs Q1 and Q2 on and off alternately, a fluorescent lamp FL is lighted up at high frequencies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device, a fluorescent lamp device, and a lighting device using N-channel and P-channel transistors.

[0002]

2. Description of the Related Art Conventionally, as a fluorescent lamp device, a light bulb type device is becoming widespread, and a half-bridge type inverter circuit is used for a built-in power supply device. A current transformer is used.

However, in recent years, miniaturization has been attempted, and as a configuration not using a current transformer, for example, published on March 28, 1997 by The Illuminating Engineering Institute of Japan, the 1997 Annual Meeting of the Illuminating Engineering Institute of Japan 30th Annual Conference The configuration described on page 46 is known.

This collection of lecture papers has a half-bridge type inverter circuit that uses a field-effect transistor as a main switching element and supplies power to a fluorescent lamp. The gates of these field-effect transistors have a magnetic ballast choke. Is connected to a resonance circuit of an inductor and a capacitor connected in series to this secondary winding, and a zener diode is connected to each field-effect transistor to prevent simultaneous turning on. The disclosed discharge lamp lighting device is described.

Then, in accordance with the voltage induced in the secondary winding of the ballast choke, the inductor and the capacitor resonate and the field-effect transistor is alternately turned on and off, generating a high-frequency alternating current and lighting the fluorescent lamp at high frequency. ing.

[0006]

However, in the case of the fluorescent lamp device described in the above-mentioned collection of lecture papers, a resonance circuit of an inductor and a capacitor must be provided corresponding to each transistor. In order to prevent both field-effect transistors from being turned on at the same time by operation, a Zener diode must be connected to each field-effect transistor to prevent them from being turned on at the same time. ing.

The present invention has been made in view of the above problems, and has as its object to provide a power supply device, a fluorescent lamp device, and a lighting device with a simplified circuit configuration.

[0008]

According to a first aspect of the present invention, there is provided a power supply device comprising: a half-bridge type inverter circuit having an N-channel transistor and a P-channel transistor as main switching elements; and a control circuit for controlling the transistors of the inverter circuit. Means, the N-channel transistor and the P-channel transistor are operated by the control means, so that they can be controlled to different states by the output of one control means, thereby simplifying the circuit configuration.

According to a second aspect of the present invention, in the power supply device of the first aspect, the N-channel transistor is located on the high potential side, and the N-channel transistor and the N-channel transistor can be connected without complicating the control means. Controls P-channel transistors.

According to a third aspect of the present invention, there is provided the power supply device according to the first or second aspect, further comprising a ballast choke connected to the inverter circuit, wherein the control means includes a secondary magnetically connected to the ballast choke. It has a winding and drives the transistor by this secondary winding, so that a driving power supply for the transistor can be obtained with a simple circuit configuration.

According to a fourth aspect of the present invention, in the power supply device according to any one of the first to third aspects, the control means has a resonance circuit of an inductor and a capacitor, and controls the transistor by resonance of the resonance circuit. , N
Since a channel transistor and a P-channel transistor are used, both can be controlled by the output of one resonance circuit, so that a simple circuit configuration can be obtained.

According to a fifth aspect of the present invention, there is provided the power supply device according to any one of the first to fourth aspects, wherein the transistor is any one of a MOS type field effect transistor and an IGBT. And can be obtained with a simple circuit configuration.

According to a sixth aspect of the present invention, there is provided a power supply apparatus comprising: the power supply apparatus according to any one of the first to fifth aspects; and a fluorescent lamp which is turned on by the power supply apparatus. Since the power supply device is used, each operation is achieved.

According to a seventh aspect of the present invention, there is provided a fluorescent lamp device, comprising: a base having a base;
A power supply device according to any of the above, and a fluorescent lamp mounted on the base and lit by an inverter,
Since the power supply device according to any one of claims 1 to 5 is used in a device having a base, the respective operations are achieved.

The fluorescent lamp device according to an eighth aspect of the present invention is the fluorescent lamp device according to the seventh aspect, further comprising a globe which is attached to the base and is substantially in the form of a bulb together with the base. It works.

A lighting device according to a ninth aspect includes the fluorescent lamp device according to any one of the sixth to eighth aspects and a fixture main body to which the fluorescent lamp device is attached, and has respective functions.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a fluorescent lamp device according to the present invention will be described below with reference to FIGS.

FIG. 1 is a circuit diagram showing a lighting circuit of an embodiment of a fluorescent lamp device, FIG. 2 is a sectional view showing the fluorescent lamp device, and FIG. 3 is a waveform diagram showing operation.

As shown in FIG. 2, reference numeral 1 denotes a cover constituting a base. The cover 1 is formed of a heat-resistant synthetic resin such as PBT resin, and a cylindrical portion 2 is integrally formed at one end of the cover 1. A screw-type base 3 such as an Edison type E26 type is attached to the cylindrical portion 2,
The base 3 is fixed to the cylindrical portion 2 by an adhesive or caulking.

The other end of the cover 1 is closed by a partition 4 which is made of a heat-resistant synthetic resin such as PBT resin and has a substantially circular dish shape. A high-frequency lighting circuit 5 is provided on the partition 4.
Printed circuit board 6 is locked.

Further, a connection terminal 7 protrudes from one end of the printed circuit board 6, and the external lead wire 11 of the saddle-type fluorescent lamp FL is wound around and connected thereto. The fluorescent lamp FL may be U-shaped, W-shaped or the like.

On the lower surface of the partition 4, a lamp mounting tube portion 12 as a holding portion is integrally formed. A fluorescent lamp FL is mounted on the lamp mounting tube portion 12. The fluorescent lamp FL has a power consumption of 15 W to 17 W and a lamp current of 250 mA to 350 mA. The brightness is about a 60 W incandescent lamp.

In the fluorescent lamp FL, both ends 14 of a bulb 13 in which a phosphor film (not shown) is formed on the inner surface and a rare gas such as mercury and argon is sealed therein are arranged in close proximity to each other. It has a central bent portion 15 bent in a U-shape between the two end portions 14, and the central bent portion 15 is bent so as to face the same direction as the both end portions 14. Is formed. Furthermore, both ends of the valve 13
14 encloses filaments FL1 and FL2 of a triple coil, and an auxiliary amalgam 17 is attached to each of these filaments FL1 and FL2. Each pair of external lead wires 11 connected to the filaments FL1 and FL2 is led to the outside from the end portion 14 of the bulb 13, and is connected to the connection terminal 7 by, for example, winding a plurality of times.

A thin tube 18 projects from both ends 14 of the bulb 13. At least one of the thin tubes 18 accommodates amalgam 19 for controlling the mercury vapor pressure during lighting.

Further, the fluorescent lamp FL is inserted from below the partition 4 into the lamp mounting cylinder 12 having both ends 14 formed on the partition 4, and between the end 14 and the lamp mounting cylinder 12. Is fixed to the partitioning machine 4 by a thermosetting adhesive 21 such as a silicone-based material filled into the partition 4. The central bent portion 15 of the fluorescent lamp FL is formed of a thermosetting adhesive 22 such as a silicone type.
Is joined to the lower surface of the partition 4. For this reason,
The fluorescent lamp FL is fixed to the partition board 4 at a total of three places of both ends 14 and a center bent portion 15.

The fluorescent lamp FL is covered with, for example, a glass globe 25, and the glass globe 25 has a cup shape with an open upper end. In addition,
The globe 25 is made of a transparent or light-diffusing synthetic resin or glass. The globe 25 may have a straight neck portion 26 with a slightly smaller upper end opening. Further, at the opening end of the neck portion 26, a meat reservoir 27 is formed continuously over the entire circumference, and the meat reservoir 27 is formed by a glove.
By heating and softening the upper opening of the 25, the melted meat gathered to form a meat pool. The cover 1 and the glove 25 constitute an envelope 28.

Further, using the lighting circuit 5, the fluorescent lamp FL
When the lamp is turned on, the amount of ultraviolet rays due to the increase in tube wall load cannot be ignored, and a diffusion film (not shown) is formed on the inner surface of the globe 25. This diffusion film absorbs ultraviolet rays including ultraviolet rays having a wavelength of 185 nm, for example. UV absorbers of UV-absorbing inorganic fine particles such as substances are mixed to block ultraviolet rays. In addition, since the ultraviolet absorbing inorganic fine particles have an average particle size of less than 1 μm, the linear transmittance is increased, the visible light diffusion effect is reduced, and the linear transmittance is increased due to the attachment of volatile components, and the inside is transparent. Because
Inorganic fine particles having an average particle size of 1 μm or more are mixed for visible light scattering. Furthermore, simply increasing the average particle diameter deteriorates the skin of the film and creates a shadow.
m and a mean particle size of 1 μm
m or more may be contained by 30% or more, and the particle size distribution may be widely dispersed.

The neck 26 of such a glove 25 is
The glove 25 is inserted into a ring-shaped gap formed between the inner surface of the cover 1 and the partition 4 by means of a thermosetting adhesive 31 such as silicone. 4 is joined to both.
The thermosetting adhesive 31 may be bonded to at least one of the inner surface of the cover 1 and the partition 4.

The thermosetting adhesive 31 is thermosetting and is made of, for example, silicone, and has a hardness at the time of curing of 20 or more and 50 or less. The hardness can be changed by adjusting the mixing ratio of the curing agent to be used.

Further, as shown in FIG. 1, the lighting circuit 5
A capacitor C1 constituting a filter is connected to the commercial AC power supply e via a fuse F1, and an input terminal of the full-wave rectifier 41 is connected to the capacitor C1 via an inductor L1 constituting the filter. Further, a smoothing capacitor C2 is connected to an output terminal of the full-wave rectifier 41 via a resistor R1, and an instant start type half-bridge type inverter circuit 42 is connected to the capacitor C2.

In the inverter circuit 42, a series circuit of a MOS type N-channel field effect transistor Q1 and a MOS type P-channel field effect transistor Q2, which are switching elements, is connected in parallel with the capacitor C2. .

One end of each of the filaments FL1, FL2 of the fluorescent lamp FL as a discharge lamp is connected between the drain and the source of the field effect transistor Q2 via a ballast choke L2 and a DC cut capacitor C3. , One end of filament FL1 and filament FL2
Is connected to a starting capacitor C4.

A starting resistor R2 constituting a starting circuit 43 is connected between a connection point of the resistor R1 and the capacitor C2 and a gate of the field effect transistor Q1 and a gate of the field effect transistor Q2. The gate of the field effect transistor Q1 and the gate of the field effect transistor Q2 and the field effect transistor Q1 and the field effect transistor Q2
A series circuit of a capacitor C5 and a capacitor C6 is connected to the connection point of the field effect transistor Q1 and the field effect transistor in parallel with the series circuit of the capacitor C5 and the capacitor C6 of the control circuit 44 as control means. A series circuit of a Zener diode ZD1 and a Zener diode ZD2 for gate protection of Q2 is connected. Further, a secondary winding L3 is magnetically connected to the ballast choke L2, and a resonance circuit 46 of an inductor L4 and a capacitor C6 is connected to the secondary winding L3. further,
The resistor R3 of the starting circuit 43 is connected in parallel with the series circuit of the capacitor C5 and the inductor L4.

Further, a parallel circuit of a resistor R4 of the starting circuit 43 and a capacitor C7 for improving switching is connected between the drain and the source of the field effect transistor Q2.

Next, the operation of the above embodiment will be described.

When power is supplied to the lighting circuit 5 of the fluorescent lamp device, the voltage of the commercial AC power supply e is full-wave rectified by the full-wave rectifier 41 and smoothed by the capacitor C2.

First, a voltage is applied to the gate of the N-channel field effect transistor Q1 via the resistor R2, the field effect transistor Q1 is turned on, and a voltage is applied to the fluorescent lamp FL via the ballast choke L2. Then, a voltage is induced in the secondary winding L3 of the ballast choke L2, the inductor L4 and the capacitor C6 of the control circuit 44 undergo natural resonance, and a voltage is alternately applied to the gates of the field effect transistor Q1 and the field effect transistor Q2. The field effect transistor Q1 and the field effect transistor Q2 alternately turn on and off,
The fluorescent lamp FL is turned on at a high frequency.

The gates of the field effect transistors Q1 and Q2 are protected by the Zener diodes ZD1 and ZD2.

Specifically, as shown in FIG. 3, the resonance circuit 46 of the capacitor C6 and the inductor L4 is connected to the gates of the field effect transistors Q1 and Q2.
When the gate voltage becomes a voltage equal to or higher than a predetermined positive value, the field effect transistor Q1 is turned on, a drain current flows, and the field effect transistor Q2
Is turned off, so that the source and drain voltages are generated and the drain current of the field effect transistor Q2 does not flow.

On the other hand, a resonance current by the resonance circuit 46 of the capacitor C6 and the inductor L4 is applied to the gates of the field effect transistors Q1 and Q2,
When the gate voltage becomes equal to or lower than a predetermined negative value, the field effect transistor Q2 turns on, a drain current flows, and the field effect transistor Q1 turns off. Note that a voltage is generated in the secondary winding L3 of the ballast choke L2 in response to these operations.

FIG. 4 is a perspective view showing a downlight which is a lighting device using the fluorescent lamp device. The downlight-type lighting device includes a cylindrical device main body 51 which opens downward, and the device main body. The fluorescent lamp device is inserted and arranged inside 51. An Edison-type socket (not shown) to which the base 3 of the fluorescent lamp device is screwed and connected is provided at the upper part on the inside of the fixture body 51.

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

FIG. 5 is a circuit diagram showing a lighting circuit of a fluorescent lamp device according to another embodiment. In the lighting circuit 5 shown in FIG. 5, N-channel and P-channel field effect transistors of the lighting circuit 5 shown in FIG. Instead of Q1 and Q2, N-channel and P-channel IGBTs (Insulate Gate Bipola Traps)
nsistor) Q11 and Q12 are used, and the basic operation is the same as the configuration shown in FIG.

In any of the above embodiments, the N-channel and P-channel field-effect transistors Q1 and Q2 or the IGBTs Q11 and Q12 are used and the N-channel field-effect transistor Q1 or IGBT Q11 is connected to the high potential side. N-channel and P-channel field effect transistors Q1, Q2 or IGBTs Q11, Q
12 can be controlled and one resonance circuit 46 and zener diodes ZD1 and ZD2 for gate protection can be connected, so that the configuration can be simplified and the size can be reduced.

[0045]

According to the power supply device of the first aspect, since the N-channel transistor and the P-channel transistor are operated by the control means, each of them can be controlled to be in a different state by the output of one control means. Can be simplified.

According to the power supply device of the second aspect, in addition to the power supply device of the first aspect, the N-channel transistor and the P-channel transistor can be controlled without complicating the control means.

According to the power supply device of the third aspect, in addition to the power supply device of the first or second aspect, a drive power supply for the transistor can be obtained with a simple circuit configuration.

According to the power supply device of the fourth aspect, in addition to the power supply device of any one of the first to third aspects, an N-channel transistor and a P-channel transistor are used. Since both can be controlled, it can be obtained with a simple circuit configuration.

According to the power supply device of the fifth aspect, in addition to the power supply device of any one of the first to fourth aspects, the on / off of the transistor can be easily controlled and a simple circuit configuration can be achieved.

According to the power supply device of claim 6, since the power supply device of any one of claims 1 to 5 is used,
Each effect can be achieved.

According to the fluorescent lamp device of the seventh aspect,
Since the power supply device according to any one of claims 1 to 5 is used in a device having a base, respective effects can be obtained.

According to the fluorescent lamp device of the eighth aspect,
In addition to the fluorescent lamp device according to the seventh aspect, the respective effects can also be obtained with a light bulb type.

According to the illuminating device of the ninth aspect, since the fluorescent lamp device of any one of the sixth to eighth aspects is provided, each effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a lighting circuit of a fluorescent lamp device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the fluorescent lamp device according to the first embodiment;

FIG. 3 is a waveform chart showing the same operation.

FIG. 4 is a perspective view showing the lighting device.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cover which comprises a base 3 Base 25 Glove 42 Inverter circuit 44 Control circuit as control means 51 Appliance body FL Fluorescent lamp L2 Ballast choke L3 Secondary winding L4 Inductor Q1 N-channel field-effect transistor Q2 P-channel field-effect transistor Q11 N-channel IGBT Q12 P-channel IGBT

Claims (9)

[Claims] 1. A power supply device comprising: a half-bridge type inverter circuit having an N-channel transistor and a P-channel transistor as main switching elements; and control means for controlling the transistors of the inverter circuit. . 2. The power supply device according to claim 1, wherein the N-channel transistor is located on a high potential side. 3. A ballast choke connected to the inverter circuit, wherein the control means has a secondary winding magnetically connected to the ballast choke, and drives the transistor by the secondary winding. The power supply device according to claim 1 or 2, wherein 4. The control means has a resonance circuit of an inductor and a capacitor, and controls the transistor by resonance of the resonance circuit.
The power supply according to any one of the above. 5. The power supply device according to claim 1, wherein the transistor is one of a MOS field effect transistor and an IGBT. 6. The power supply device according to claim 1, further comprising: a power supply device according to claim 1; and a fluorescent lamp that is turned on by the power supply device. 7. A base having a base; a power supply device according to any one of claims 1 to 5 accommodated in the base; and a fluorescent lamp mounted on the base and lit by an inverter. Fluorescent lamp device. 8. The fluorescent lamp device according to claim 7, further comprising a globe which is attached to the base and is substantially bulb-shaped together with the base. 9. A lighting device, comprising: the fluorescent lamp device according to claim 6; and a fixture main body to which the fluorescent lamp device is attached.