JPH10189279A - Fluorescent lamp device, and luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluorescent lamp device in which lighting can be securely stopped at a service life end period of a fluorescent lamp. SOLUTION: As power is charged to a lighting circuit 5 of a fluorescent lamp device, a voltage of a commercial AC power supply (e) is full-wave rectified by a full-wave rectifier 41, and it is smoothed by a capacitor C2. By a voltage at a capacitor C3 becoming a predetermined value or more, a trigger element Q3 gets on, and a gate voltage is applied to a gate in a field effect transistor Q2. An inverter circuit 42 starts operation, field effect transistors Q1, Q2 alternately get on/off by a current transformer CT to oscillate, and a fluorescent lamp LF is started to be lighted. As either emitter of filaments FLa, FLb is completely eliminated, a voltage at the fluorescent lamp LF is increased. Zener diodes ZD1, ZD2 get on, the field effect transistor Q2 is self- broken, the inverter circuit 42 stops oscillation, and the lighting circuit 5 will not operate after that.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulb-shaped fluorescent lamp device and a lighting fixture using the fluorescent lamp device.

[0002]

2. Description of the Related Art Conventionally, as a fluorescent lamp apparatus of this type, for example, a structure described in Japanese Patent Application Laid-Open No. 58-64799 is known.

Japanese Patent Application Laid-Open No. 58-64799 discloses that
One end of each of the filaments of the fluorescent lamp is connected to a power supply via a ballast, and the collector and the emitter of the transistor are connected to the other end. Further, a non-linear dielectric element having thermal coupling with the transistor is connected to the base of the transistor.

Then, for example, when the emitter of the filament of the fluorescent lamp disappears and the transistor generates heat, the non-linear dielectric element operates to keep the transistor in an off state, and the transistor is destroyed by heat due to self-loss. Preventing it from happening.

[0005]

However, in the case of the configuration described in the above-mentioned Japanese Patent Application Laid-Open No. 58-64799, there is a possibility that the transistor may be restarted if the transistor is cooled, for example, by temporarily stopping its operation. It is not practical because there is. On the other hand, in the case of a light bulb-type fluorescent lamp device that has become widespread in recent years, when the fluorescent lamp reaches the end of its life, the fluorescent lamp alone is not replaced, and the lighting circuit is also discarded together. Therefore, unlike the related art described above, it is not necessary to operate the lighting circuit again, and there is a problem that the life of the fluorescent lamp device is difficult to understand by restarting.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a fluorescent lamp device and a lighting fixture that reliably stop lighting at the end of life of a fluorescent lamp.

[0007]

According to a first aspect of the present invention, there is provided a fluorescent lamp device comprising: a base having a base; a fluorescent lamp provided with an electrode having an emitter; and a fluorescent lamp mounted on the base; A lighting circuit configured to be damaged and stopped and attached to the base.The lighting circuit is self-destructed when the emitter disappears, so that the lighting circuit reliably stops operating after the emitter of the fluorescent lamp disappears. , Heating or the like is prevented.

According to a second aspect of the present invention, there is provided a fluorescent lamp device according to the first aspect, wherein the lighting circuit includes an intersection of an operating line of the lighting circuit and a normal VI curve of the fluorescent lamp, and an operating line of the lighting circuit. In addition, the self-breakage occurs between the intersection of the VI curve where the emitter of at least one electrode has completely disappeared. Even if the emitter of one of the electrodes disappears, the lighting circuit surely stops.

According to a third aspect of the present invention, there is provided a fluorescent lamp device according to the first or second aspect, wherein the lighting circuit has a switching element, and the switching element is damaged to be self-damaged. Self-damaging in configuration.

According to a fourth aspect of the present invention, there is provided a fluorescent lamp device according to any one of the first to third aspects.
It is provided with a glove attached to a base, and also corresponds to a glove.

According to a fifth aspect of the present invention, there is provided a lighting apparatus including the fluorescent lamp device according to any one of the first to fourth aspects and an apparatus main body using the fluorescent lamp apparatus, and has the respective functions.

[0012]

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 graph 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 a 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 cylinder 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 in which a rare gas such as mercury and argon is sealed are arranged in close proximity to each other. It has a central bent portion 15 bent in a U-shape between these 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 an electrode coil 16 of a triple coil, each of which has an auxiliary amalgam 17
Is attached. Each pair of external lead wires 11 connected to these electrode coils 16 is connected to a valve 13 respectively.
Is connected to the connection terminal 7 by winding it a plurality of times, for example.

At both ends 14 of the bulb 13, small tubes 18 are projected, and at least one of these small tubes 18 accommodates amalgam 19 for controlling the mercury vapor pressure during lighting.

Furthermore, both ends 14 of the fluorescent lamp FL are inserted into the lamp mounting tube 12 formed on the partition 4 from beneath the partition 4, and between the end 14 and the lamp mounting tube 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. 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 the 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. The hardness at the time of curing is 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 a full-wave rectifier 41 is connected to the capacitor C1 via an inductor L1 and a resistor R1 constituting a filter. Further, a smoothing capacitor C2 is connected to an output terminal of the full-wave rectifier 41, and a half-bridge type inverter circuit 42 of an instant start system is connected to the capacitor C2.

In the inverter circuit 42, a series circuit of a field effect transistor Q1 and a field effect transistor Q2, which are switching elements, is connected in parallel with the capacitor C2. In addition, a series circuit of a resistor R2 and a capacitor C3 is connected in parallel with the capacitor C2, and a connection point of the resistor R2 and the capacitor C3 is connected to a gate of the field effect transistor Q2 via a trigger element Q3. In addition, it is connected to a connection point between the field effect transistor Q1 and the field effect transistor Q2 via the diode D1 and the resistor R3. Furthermore, the field effect transistor Q1
Is connected in parallel with a resistor R4 and a capacitor C4.

The gate of the field effect transistor Q1
Between the drains, the first control winding CTb of the current transformer CT
Connected between the gate and drain of the field effect transistor Q2, a capacitor C5, a resistor R5, and a Zener diode ZD.
1, ZD2 and the second control winding CTc of the current transformer CT are connected.

Further, the connection point between the field effect transistor Q1 and the field effect transistor Q2 is connected to the detection winding CTa of the current transformer CT and the ballast choke L2 having a capacity of 600 μH.
And fluorescent lamp via DC cut capacitor C6
The filaments FLa and FLb of the FL are connected to each other, and a capacitor C7 for starting with an induction amount of 10 nF is connected between the filaments FLa and FLb.

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

When power is applied 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. Then, the capacitor C3 is charged, the capacitor C3 is charged, a predetermined voltage is applied between the drain and the source of the field effect transistor Q2, and when the voltage of the capacitor C3 becomes equal to or higher than a predetermined value, the trigger element Q3 Turns on and applies a gate voltage to the gate of the field effect transistor Q2,
The inverter circuit 42 starts operating, and the current transformer CT turns on the field effect transistor Q1 and the field effect transistor.
Q2 is turned on and off alternately to oscillate, and a high-frequency AC voltage is applied between the filaments FLa and FLb without preheating the filaments FLa and FLb of the fluorescent lamp FL by the instant start method. A discharge is induced within the lamp to start and light up.

On the other hand, if any one of the emitters of the filaments FLa and FLb completely disappears, the voltage of the fluorescent lamp FL rises, and the Zener diode ZD1 or ZD2 turns on, and the field effect transistor Q2 is destroyed. When the voltage is applied, the field effect transistor Q2 is self-damaged, the inverter circuit 42 stops oscillating, and thereafter the lighting circuit 5 does not operate again.

As shown in FIG. 3, from the intersection a of the operating line A of the lighting circuit 5 and the normal VI curve B of the fluorescent lamp FL, the operating line A of the lighting circuit 5 and at least one of the filaments FLa and FLb are connected. By moving to the intersection b of the VI curve C where the emitter has completely disappeared and causing self-damage, even if the emitter of one of the filaments FLa and FLb has disappeared, the lighting circuit 5 can be reliably stopped in a short time. Since the operating line B of the lighting circuit 5 has a steeper slope than the conventional operating line D, in the conventional case, the fluorescent lamp FL is operated for a long time with a small current at the intersection c after the voltage is increased.
May be heated while maintaining the lit state, but in the case of the above embodiment, the input power is about 6
Since it increases by 7%, the lighting circuit 5 can be destroyed in a short period of time without adversely affecting the surroundings because the surroundings and the like are not heated more than necessary. In addition, the intersection a has a voltage of 50
V, current 0.3A, input power 15W, intersection b is voltage 10
The input power is 25 W at 0 V and the current of 0.25 A, and the intersection c is 110 V and the input power is 16.5 W at the current of 0.15 A.

FIG. 4 is a perspective view showing a downlight, which is a lighting device using a fluorescent lamp device. The downlight-type lighting device includes a cylindrical device body 51 that opens downward, and the device 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.

It is to be noted that the present invention is not limited to the one in which the field-effect transistor Q2 is destroyed and self-damaged, but may be set so that a film capacitor or the like is damaged and self-damaged.

[0035]

According to the first aspect of the present invention, since the lighting circuit is self-damaged when the emitter disappears, the operation of the lighting circuit is surely stopped after the emitter of the fluorescent lamp disappears, and the heating or the like occurs. Can be prevented.

According to the fluorescent lamp device of the second aspect,
In addition to the fluorescent lamp device according to claim 1, in the lighting circuit, the intersection of the operating line of the lighting circuit and the normal VI curve of the fluorescent lamp, the operating line of the lighting circuit, and the emitter of at least one electrode are completely lost. Since the self-breakage occurs at the intersection of the VI curve in the state, even if the emitter of one electrode disappears, the lighting circuit can be reliably stopped.

According to the fluorescent lamp device of the third aspect,
In addition to the fluorescent lamp device according to the first or second aspect, the lighting circuit has a switching element, and the switching element is damaged and is self-damaged.

According to the fluorescent lamp device of the fourth aspect,
In addition to the fluorescent lamp device according to any one of claims 1 to 3, further comprising a globe attached to the base,
It can also be used with gloves.

According to the luminaire of the fifth aspect, since the fluorescent lamp device according to any one of the first to fourth aspects is used for the luminaire main body, 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 graph showing the same operation.

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

[Explanation of Signs] 1 Cover constituting base 3 Cap 5 Lighting circuit 25 Globe FL Fluorescent lamp Q2 Field effect transistor as switching element 51 Instrument body

Claims (5)

[Claims] 1. A base having a base; a fluorescent lamp provided with an electrode having an emitter; and a fluorescent lamp mounted on the base, wherein the fluorescent lamp is turned on, and is self-damaged and stopped when the emitter disappears, and is mounted on the base. A fluorescent lamp device, comprising: a lighting circuit; 2. A lighting circuit, comprising: an intersection of an operating line of the lighting circuit and a normal VI curve of the fluorescent lamp; and an intersection of an operating line of the lighting circuit and a VI curve in a state in which at least one emitter of the electrode has completely disappeared. 2. The fluorescent lamp device according to claim 1, wherein the fluorescent lamp device is self-damaged between the lamp and the lamp. 3. The fluorescent lamp device according to claim 1, wherein the lighting circuit has a switching element, and the switching element is damaged and is self-damaged. 4. The fluorescent lamp device according to claim 1, further comprising a globe attached to the base. 5. A lighting device comprising: the fluorescent lamp device according to claim 1; and a device main body using the fluorescent lamp device.