JP2000173786A - Lighting system using heat radiation type lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong service life so as to reduce the frequency of replacement by providing a lighting automatic switching apparatus which is electrically connected to a circuit terminal of a heat radiation type lighting fixture and carrying a current to one filament part when the other currently used filament part stops lighting. SOLUTION: In an incandescent lamp 2, a first filament part A and a second filament part B, in each of which one side is used as a common terminal, are built in a glass bulb 18, while the other terminals of the first filament A and the second filament B are respectively connected to different circuit terminals A1, B1, and the common terminals are constructed as a common circuit terminal C1 connected to a base. A lighting automatic switching apparatus 4 connected to the respective terminals A1, B1, C1 carries a current to a filament 12b in the second filament part B for emitting light immediately, when a filament 12b in the filament part A stops emitting light, for example. The lighting automatic switching apparatus 4 is provided with a defective light emission detecting means which detects the failure of light emission and a switching means for switching the filament at detection of failure of light emission. In this way, failure of light emission can be prevented in an environment which has aversion to even momentary failure in light emission.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting system, and more particularly to a lighting system using a heat-radiating lamp which has a long life and can be reduced in the number of replacements.

[0002]

2. Description of the Related Art Heat radiation type lamps, such as incandescent lamps, are well-directed and emit light with a warm color, and are easy to light and dimming.
It is widely used in various places such as accommodation facilities such as hotels, theaters, airports and vehicles. However, the conventional incandescent lamp has a structure in which one filament (including a double filament) that emits light by the generation of heat when energized is built in the bulb, has a life of about 1000 to 1500 hours for general lighting, and blinks repeatedly. This tends to be even shorter. Halogen lamps are also widely used as heat radiation lamps that have a longer life and are more compact than incandescent lamps, but they are very expensive compared to incandescent lamps, and their basic structure is a single unit like incandescent lamps. Since it only has a filament, its life is about 2000 hours.

[0003] For this reason, during use, a non-lighting state suddenly occurs, and the persistence of such a non-lighting state is not only bad in appearance, but also has a serious effect on security and safety, and is great in business activities and the like. Obstruction or loss. Therefore, in the case of high-altitude lighting, such as information signs and outdoor signboards, when a lighting failure occurs, it is necessary to use a crane truck and immediately arrange a security guard to replace the light source. Inevitably, the labor and cost were extremely high. In addition, when used for lighting in stores, etc., if it is crowded with customers, it will hinder replacement work of light bulbs,
There was a problem that the business had to be temporarily suspended and replaced. In hospitals and nursing homes, replacement work is extremely difficult.
In these cases, there was no other way than to replace them regularly in anticipation of the use period.

[0004] In emergency lighting such as emergency lighting equipment and guide lights, for example, it is required that when a normal power supply is cut off, the power supply is automatically switched to a standby power supply and can be continuously lit for a certain period of time. ing. Therefore, these emergency lighting fixtures,
In disaster-prevention lighting such as guide lights, a battery is built-in as a standby power supply, and when a power failure occurs, a power-off is detected, and the lighting equipment is turned on by power from the built-in battery.

However, these methods only detect when the normal power supply is cut off, switch to the standby power supply, and continue the lighting state. Even though the normal power supply is normal, the filament of the lamp itself is not used. There was no effect at all in eliminating non-lighting caused by aging, life span, failure, and the like.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to substantially shorten the life and reduce the number of replacements. An object of the present invention is to provide a lighting system using a heat radiation type lighting device which can be easily maintained. In the present invention, "heat radiation type lamp" is not light emission due to discharge,
It refers to an electric bulb of a type that emits light by heat generation (heat radiation) by energization of a filament, and sockets necessary for connecting the electric bulb to a power supply circuit, or members and devices for light reflection, refraction, diffusion, and the like. A typical heat radiation type lamp is an incandescent lamp, but also includes a halogen lamp, an infrared lamp, and the like. Incandescent lamps include those for general lighting, such as a white diffused type and a transparent type, a reflective type having a reflective surface deposited thereon, a krypton bulb, and a decorative type having a deformed glass bulb. Halogen lamps include those of the type using an infrared reflective film and those of a low voltage type. And, the present invention is applicable to any lighting using a heat radiation type lamp,
For example, in addition to general household lighting, security lighting, floodlighting, guidance lighting, display lighting, ceiling lighting, louver lighting, staging lighting, rooftop signage and sleeve signage, sign lighting, road signs, traffic lights, fish light , For copying equipment.

[0007]

In order to achieve the above object, an illumination system using a heat radiation type lamp according to the present invention has two sets of filament portions each having a common terminal on one side and a common terminal connected to the common terminal. A light emitting lamp including an electrode and two sets of electrodes connected to the other side of each filament portion, and a heat radiation type lamp including a socket for holding the light bulb and connecting to the three electrodes; and a circuit terminal of the heat radiation type lamp. It is characterized by being provided with a lighting automatic switching device which is electrically connected and supplies electricity to the other filament portion to emit light when the current filament portion does not emit light.

Preferably, the automatic lighting switching device includes a non-light emission detecting means for detecting non-light emission of the filament portion which is supplied with electric power and is in a light-on state, and wherein the non-light emission detecting means comprises a non-light emission of the filament portion. Switching means for switching the supply of power from the filament part to another filament part when detecting the non-emission, and the non-light emission detection means refers to the current value of the power supplied to one fimentment part. Detecting the change of the filament portion from the light emitting state to the non-light emitting state.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a lighting system using a heat radiation type lamp according to the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 3 show a lighting system in which the present invention is applied to an incandescent lamp, and a lamp 1 having an incandescent lamp 2 and a three-pole socket or outlet (bulb receptacle) 3.
, An automatic lighting switch 4 and an alarm means 5.
The incandescent lamp 2 has a first bulb portion A and a second filament portion B having one side as a common terminal in a bulb 18 made of glass, and the other side where the first filament portion A and the second filament portion B remain. Terminals are separate circuit terminals (electrodes)
The common terminal is connected to A1 and B1, and the common terminal is a common electrode (terminal for common circuit) C1 connected to the base.

More specifically, reference numeral 10 denotes a stem made of glass inserted into the center of the bulb 18;
b is a set of two lead wires inserted through and supported by the stem 10, and each of the lead wires 11a and 11b may have a dumet wire on one side and a constantan wire on the other.
A coil-shaped filament (including a double filament) 12 is provided at the tip of each of the introduction wires 11a and 11b.
a, 12b are installed, and each filament 12a,
12b is mounted symmetrically with respect to the center of the valve 18 and has the same power consumption. The center portion is supported and fixed by anchor wires 13a and 13b extending from the button of the stem 10. Note that the introduction lines 11a and 11b may be further supported by tie wires extending from the side of the button of the stem 10.

A first filament portion A is constituted by the introduction line 11a and the filament 12a, and the introduction line 11b
And the filament 12b constitute a second filament portion B. Thus, the first filament portion A
The mount having the second filament portion B is inserted and sealed in the valve 18, and the exhaust pipe 14 is filled with vacuum or an inert gas such as nitrogen gas, argon gas, or krypton gas.

A base 19 made of a conductive metal is fitted and fixed to the lower end of the bulb 18. The base 19 has two electrodes (circuit terminals) via an insulator, and
a is connected to the electrode A1 for the first filament,
One of the introduction wires 11b is connected to the electrode B1 for the second filament. The other one of the introduction lines 11a, 11b
The book is connected to the base 19 and serves as a common terminal (common electrode) C1. The socket 3 is provided with two sets of electrodes A1 and B on a receptacle body 30 made of an insulating material such as synthetic resin or porcelain.
Circuit terminals A2, B2 each corresponding to 1
And a base 1 as a common electrode C1.
9 is fitted with a cylindrical common terminal C2. The circuit terminals A2, B2 and the common terminal C2 are connected to connection lines 3a, 3b and a common connection line 3c for connecting to the automatic lighting switch 4, respectively. In this example, the circuit terminals A2 and B2 are in the form of pins that are biased by springs. The bulb 18 may be transparent or frosted, or may have a white coating or a reflective surface inside, and the shape is not limited.

[0013] The automatic lighting switch 4 is provided with one filament portion, for example, the filament 1 of the first filament portion A.
When non-light emission (non-lighting) occurs due to deterioration or failure of 2a, power is supplied to the other filament portion, for example, the filament 12b of the second filament portion B, instantaneously, thereby causing energized light emission. Non-light emission detecting means for detecting non-light emission of the first filament portion A which is supplied and lit, and supplies power when the non-light emission detection means detects non-light emission of the first filament portion A; Switching means for switching from the first filament part A to the second filament part B.

The non-light emission detecting means simply detects the change of the light emission state of the first filament part A from the light emission state to the non-light emission state with reference to the current value of the power supplied to the first filament part A. Is adopted. The non-light emission detecting means has a threshold value for the detection value when detecting the non-light emission of the first filament part A, and detects the non-light emission of the first filament part A in response to a change in the detection value exceeding the threshold value. The detection may be configured. The switching means may not only switch the power supply, but also switch on an alarm means for notifying the non-light emission or the light emission abnormality.

FIG. 4 and FIG. 5 show the circuit of the automatic lighting switch 4, which includes AC power input terminals 400 and 401, an active load terminal 403, a standby load terminal 405, and a common terminal 404.
The first filament portion A, that is, the connection line 3a is connected to the working load terminal 403, and the standby load terminal 4
05 is connected to the second filament section B, that is, the connection line 3b, and the common terminal 404 is connected to the common connection line 3c.
Further, AC power is supplied to the automatic lighting switch 4 via the AC power input terminals 400 and 401.
This circuit has alarm output terminals 409 and 410, and any alarm device is connected to the alarm output terminals 409 and 410. As the alarm, a buzzer may be used, or an indicator panel having a lamp for displaying the non-light emitting state of the first filament part A may be used.

Next, the internal configuration of the automatic lighting switch 4 will be described. The line 406 connected to one of the AC power input terminals 400 is directly connected to the common terminal 404. Further, a line 407 connected to the other terminal 401 of the AC power input terminal is connected to another terminal 403 of the working load terminal via the stop detection transformer 41 and the fuse 42, and is connected to a relay switch section 48b to be described later. Another terminal 405 of the preload terminal via the fuse 44
Connected to. The stop detection transformer 41 includes an iron core 41.
1 and a current coil 410 as a primary side and a voltage coil 412 as a secondary side. In addition, the stop detection transformer 4
1. A DC conversion circuit 45 including a detector D1, a detector D2, and a capacitor C includes a resistor 46 and a relay driving unit 47.
a are connected in series.

The relay drive section (RL1) 47a is composed of, for example, a DC electromagnetic relay, and turns on and off the circuit by driving the relay switch sections 47b and 47c as movable contacts. Similarly, the relay drive section (RL2) 48a is composed of, for example, an electromagnetic relay for AC, and drives a relay switch section 48b as a movable contact to turn on and off the circuit. A relay drive unit (R) as a disconnection relay is provided between one line 406 of the AC power input terminal and the other line 407.
L2) 48a is connected to the relay switch unit 47b.
Further, a relay switch unit 47c is connected to the alarm output terminals 409 and 410. In a normal state, that is, when the first filament portion A emits light, the relay switch portion 47b is closed, and the relay switch portion 47c and the relay switch portion 48b are open. When the first filament portion A does not emit light, the relay switch portion 47b is opened, and the relay switch portion 47c and the relay switch portion 48b are closed.

FIG. 6 shows a lighting system in which the present invention is applied to a halogen lamp. The lighting system 1 includes a halogen bulb 2 'and a socket or outlet (hereinafter referred to as a socket) 3, an automatic lighting switching device 4, Alarm means 5. Details of the automatic lighting switch 4 and the alarm means 5 are shown in FIGS.
The description is omitted because it is the same as that shown in FIG. As shown schematically in FIG. 6, the halogen bulb 2 'has a first bulb portion A and a second filament portion B which are mutually independent incorporated in a bulb 18 made of quartz glass or the like, and is inert in the bulb. A small amount of halogen element or halogen compound is sealed in addition to gas. The first filament part A and the second filament part B are connected to different electrodes (circuit terminals) A1 and B1 and a common electrode (common circuit terminal) C1.

The bulb 18 has a built-in glass stem 10 through which two sets of feedthroughs 11a and 11b are inserted, and each set of feedthroughs 11a and 11b has a coiled filament 12a and 12b. Is connected. The filaments 12a, 12b are supported and fixed at their central portions by anchor wires 13a, 13b extending from the stem 10. The two sets of lead-in lines 11a and 11b are external lead-in lines 11a 'and 11b' via molybdenum foil 15, respectively.
The valve 18 and the lead wires 11a and 11b are sealed by a pinch seal using a molybdenum foil 15. The introduction lines 11a, 11a 'and the filament 12a
Constitutes the first filament part A,
The second filament portion B is constituted by b, 11b 'and the filament 12b.

An insulator 19 made of synthetic resin or the like filled with an insulating material is fitted and fixed to the lower end of the valve 18. The insulator 19 is composed of an electrode (circuit terminal) A1 for a first filament portion and a second It has a filament part electrode (circuit terminal) B1 and a common circuit terminal (common electrode) C1, and each of the external introduction lines 11a 'and 11b' corresponding to the circuit terminals A1 and B1. Are connected to the common circuit terminal C1 to form a plug. The socket 3 is formed by fixing a circuit terminal A2, B2 for each one electrode A1, B1 and a circuit terminal C2 for a common electrode C1 to a body 30 made of an insulating material such as synthetic resin or porcelain, The connection terminals 3a, 3 for connecting to the automatic lighting switch 4 are connected to the circuit terminals A2, B2, C2.
b, 3c are connected. In the figure, the first filament portion A and the second filament portion B, electrodes and circuit terminals A1, A2, B1, B2, C1, C are shown for simplicity.
2 are shown in parallel. Note that the bulb 18 may have a porous infrared reflective film on the outer surface. Further, a reflecting mirror provided with a multiple interference film directly or separately from the two-circuit outlet 3 may be provided.

The present invention is not limited to the embodiment. For example, the common electrode C1 may not necessarily be provided on the base or the insulator, but may be a pin-type electrode, and may protrude from the lower end of the base or the insulator. That is, the three terminals of the circuit terminals A1, B1, and C1 may be of a pin type.

FIG. 7 shows an example of the automatic lighting switch 4 when a plurality of heat radiation type lamps are used.
When there are a plurality of incandescent lamps and halogen lamps such as the third lamp, these are connected in series, and when the first filament part A in any lamp shows an abnormality and does not emit light,
The second filament section B of the lamp is energized to emit light. Except that the line 406 and the branch line 408 of the line 407 are common lines,
Since the circuit configuration is the same as that of FIG. 4, the description thereof will be used to avoid duplication. Also, since the configuration of each lamp is the same as in FIGS. 1 to 3, the description is omitted. In this case, the first filament part A is used as the alarm means.
Lamps that display no light emission are preferred.

In the embodiment, the non-light emission is detected by the current value. However, for example, the detection of the change in the light amount (for example, extreme decrease or increase in the light amount) caused by the aging of the filament portion is the same as the detection of the current value. You may use together. The change or fluctuation of the light amount can be detected by providing an optical sensor such as a photodiode or a phototransistor at a position where light from an incandescent lamp or a halogen lamp can enter the lighting device. Further, in the above-described embodiment, an example in which two sets of relay circuits are used has been described. However, in some cases, it may be configured to operate with one set.

[0024]

Next, the operation of the embodiment will be described. When the power is turned on, power is supplied to one of the filament portions, in this example, the first filament portion A via the current load terminals 402 and 403, and the filament 12a is heated and emits light by heat radiation. When the first filament part A emits light (lights), the line current of the first filament part A is detected by the stop detection transformer 41 and boosted, and the direct current is detected by the detectors D1 and D2 of the DC conversion circuit 45. The voltage is converted to a voltage, and the detection voltage is adjusted by the resistor 46 so that the relay driving unit (RL)
1) Activate 47a. Relay drive unit (RL1) 47
Since a can be operated with a small power of about 0.15 W generated by the voltage coil, it does not affect the amount of power supplied to the first filament part A. As described above, the operation of the relay drive section (RL1) 47a causes the relay switch section 47 to operate.
b is closed, which causes the relay drive (RL
2) Operate 48a using the input power supply, and hold the relay switch unit 47c and the relay switch unit 48b in the open state. Therefore, the other filament portion, in this example, the second filament portion B is not energized and is in a non-light emitting state. This is the state shown in FIG.

From this state, if the filament 12a of the first filament portion A is deteriorated or abnormal and breaks,
Since the potential difference generated in the current coil of the stop detection transformer 41 decreases and the voltage of the voltage coil decreases, the detector D1,
The output voltage of D2 also decreases, thus, as shown in FIG.
The relay driving unit (RL1) 47a is deactivated and the relay switch unit 47b is opened, whereby the relay driving unit (RL2) 48a is deactivated and the relay switch unit 4 is deactivated.
8b is closed, the second filament portion B is instantaneously energized, and the filament 12a generates heat and emits light. at the same time,
The relay switch unit 47c is also closed, and outputs to the monitoring system or the like that the first filament unit A has stopped emitting light,
Activate the buzzer or the warning lamp.

Therefore, despite the fact that it is a single bulb, the lighting state is maintained as it is until the second filament portion B is degraded or an abnormality occurs and no light is emitted. Therefore, the service life is substantially extended, which is economical. In addition, maintenance can be easily performed because replacement can be performed at a desired time while the lighting by the second filament portion B is maintained, so that maintenance can be easily performed, the maintenance period can be reduced by half, and power saving can be promoted. . The replacement of light bulbs may be difficult due to business activities, such as hotels, hospitals, restaurants, banks, etc.Because replacement of light bulbs may be difficult at times such as when the business is over, The trouble can be eliminated, and the cost can be greatly reduced. In addition, in nursing homes and the like, it is often difficult to replace the body because of physical inconvenience or lack of caregivers. However, since the life span of the bulb is extended, the time and effort for replacement can be reduced by half.

Also in the case of the multi-lamp type shown in FIG. 7, when the power is turned on, one filament portion of each lamp, in this example, the first filament portion A in this example via the working load terminals 402 and 403 of each lamp. Electric power is supplied, and the filament 12a emits light and turns on. Then, when an arbitrary first filament portion A of each lamp becomes non-light emitting, the second first filament portion B paired with the lamp is energized to emit light, and the lamp in which the non-light emission occurs Is warned about. Therefore, the lighting automatic control can be intensively performed by a single lighting automatic switching device, which is economical.

FIG. 8 shows an example in which the lighting system shown in the embodiment of FIG. 6 is applied to a lighting device using an optical fiber, and has a halogen bulb 2 'having a first filament portion A and a second filament portion B. The lamp 1 includes a holder 60.
Is held by the mounting frame 6, and the connection wires 3 a,
3b is connected to a power supply via the automatic lighting switch 4. The halogen bulb 2 'has a reflecting mirror. Reference numeral 7 denotes an illumination device main body, which has an optical fiber 7a composed of a multicomponent glass fiber or a plastic optical fiber, for example, a bundle fiber obtained by bundling small-diameter optical fibers made of an acrylic resin, and the optical fiber 7a has a terminal portion. A guide 7b fixed to the mounting frame 6 is inserted into the guide 7b, and a lamp unit (emission unit) 701b reaches a light projecting unit 7c provided at the end of the guide 7b. In this example, the guide 7b has a flexible portion which is partially or entirely made of a spiral stainless steel tube or the like. The terminal outer peripheral region of the optical fiber 7a is led out from the guide 7b, and is fixed by resin or a coating so as not to disperse, and the end surface 701a as an incident surface is opposed to the halogen bulb 2 '. , And is supported by the mounting frame 6 by the holder 61. Details of the lamp 1 are shown in FIG.
Details of the automatic lighting switch 4 are shown in FIGS.

In this illuminating device, the lamp 1 is turned on by energizing the first filament portion A of the lamp 1, a light beam is incident on an end face 701a of the optical fiber 7a opposed thereto, and a light beam passes through the optical fiber 7a. The light reaches the light projecting portion 7c and is emitted from the lamp portion 701b, which is the tip of the optical fiber 7a. It is not a direct illumination by a light source lamp, but an illumination system in which light is conducted through the optical fiber 7a and emitted from the distal end. Even if 7c is approached, there is no effect of heat at all. Further, since contact with water or the like is also possible, it is possible to freely cope with an environment where water is splashed or water is splashed.

When an abnormality occurs in the first filament section A from this state, the second filament section B is instantaneously turned on by the automatic lighting switching device 4 as described above, and a light beam caused by this is emitted from the end face of the optical fiber 7a. A light beam is incident on the optical fiber 701a, the light beam passes through the optical fiber 7a, reaches the light projecting unit 7c, and is emitted from the lamp unit 701b, which is the tip of the optical fiber 7a. Therefore, a non-lighting state does not occur, and illumination is suitably maintained. The lamp 1 may be a single bulb, and the optical fiber 7a may be a single system instead of two systems, so that a compact and simple structure can be achieved. The lighting device shown in FIG. 8 includes a reading lamp and a bedside lamp, a night lamp and a foot lamp near a bed in a hospital or the like, a hand lamp near a kitchen sink, a bathroom lamp, a lighting lamp for food and cooking products, such as a salad bar. , Lighting for exhibition items in museums, etc., downlights, lighting in display cases and show windows, staging lighting, rooftop sign lights,
It can be applied to road sign lights, sign lights, underwater lighting lights, and the like.

[0031]

According to the present invention described above, the light bulb is a single compact light bulb, but has two sets of filament parts A and B each having a common terminal on one side. When the light is emitted, the other filament portion is made to emit light and the lighting state is maintained, so that the life can be extended and the number of replacements can be reduced.
In addition, the two filaments are initially energized only by one of the filaments by the automatic lighting switching device, and when this is not illuminated, the current is automatically instantaneously switched to the other filament and the illumination is smoothly performed. Can last. Therefore, even if instantaneous disagreement is disliked due to the usage situation or usage environment, this can be avoided well, and the troublesome replacement of the light source lamp can be omitted, the maintenance period can be reduced by half, and labor saving can be promoted. In addition, since no special power source is used, the present invention is economical, and since the life is doubled, the amount of waste light bulbs is reduced and the disposal cost is reduced.

According to the fourth aspect, since the non-light emission of the main filament portion is automatically notified, it is possible to easily know the necessity of replacing the light bulb and to easily perform maintenance. Is obtained. According to the fifth aspect, in addition to the features of high brightness and good light color, an excellent effect that the life can be further extended and the price can be substantially reduced can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment in which the present invention is applied to an incandescent lighting system.

FIG. 2 is a partially cutaway front view of a light bulb portion in FIG.

FIG. 3A is an explanatory view showing a connection between a filament and an electrode in a light bulb, and FIG. 3B is a rear view of a socket portion in FIG.

FIG. 4 is a block diagram showing a configuration of an automatic lighting switch in the present invention in a state of normal lighting.

FIG. 5 is a block diagram showing a state when the automatic lighting switch shown in FIG. 4 is not lit;

FIG. 6 is a side view schematically showing an embodiment in which the present invention is applied to a halogen lamp lighting system.

FIG. 7 is a block diagram showing a configuration of an automatic lighting switch in the case of a multi-light system.

FIG. 8 is an explanatory diagram showing an example of an optical fiber type lighting device utilizing the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lamp 2 Incandescent lamp 3 Socket or outlet 4 Automatic lighting switching device 5 Alarm means A 1st filament part B 2nd filament part A1 Circuit terminal (electrode) B1 Circuit terminal (electrode) C1 Common circuit terminal (common electrode) 12a Filament 12b Filament 18 Valve

Claims (5)

[Claims] An electric bulb having two sets of filament parts each having one side as a common terminal, a common electrode connected to the common terminal, and two sets of electrodes connected to the other side of each filament part, and the electric bulb is held. And a heat radiating lamp including sockets connected to the three electrodes, and electrically connected to a circuit terminal of the heat radiating lamp and energizing the other filament when the current filament emits no light. And a lighting automatic changeover device for emitting light from the lighting system. 2. A non-light emission detecting means for detecting a non-light emission of a filament part which is in a state where it can be turned on by receiving an electric power, and a non-light emission detection means detects non-light emission of the filament part. 2. A lighting system using a heat radiation type lamp according to claim 1, further comprising a switching unit for switching the supply of electric power from the filament part to another filament part. 3. The non-light emission detecting means detects a change from a light emission state to a non-light emission state of the filament part by referring to a current value of power supplied to one of the fimentation parts. An illumination system using the heat radiation type lighting device according to 1. 4. A circuit according to claim 1, wherein said switching means switches a power supply from one fimental section to the other, and switches on an alarming means for notifying non-light emission or abnormal lighting. A lighting system using the heat radiation type lighting device described in the above. 5. The heat radiation type lamp includes a halogen lamp.
An illumination system using the heat radiation type lighting device according to any one of claims 1 to 4.