JPH0982117A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dissolve deterioration of appearance resulting from occurrence of brightness imbalance when for instance, only one of fluorescent lamps is replaced with a lamp having long persistence in a multi-lamp luminaire since the brightness of the fluorescent lamp having the long residual activity is insufficient comparing to that of a conventional fluorescent lamp. SOLUTION: Plural fluorescent lamps 3 are directly or indirectly supported by a luminaire main body 1 so as to form a luminaire. At least one among fluorescent lamps 3A, 3B, 3C, 3D are the fluorescent lamps 3B, 3C showing residual activity for ten minutes or more, and the fluorescent lamps 3B, 3C showing persistence are symmetrically arranged. Thereby, the balance of the brightness is improved. The fluorescent lamps 3B, 3C are composed of straight tube shapes or curved tube shapes, and phosphor having the long persistence is contained at least 0.2mg or more per cm<2> in the luminescent layers thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture,
In particular, the present invention relates to an improvement of a lighting fixture to which a fluorescent lamp that exhibits afterglow capable of identifying an object is applied even after 10 minutes or more have passed since the lamp was turned off.

[0002]

2. Description of the Related Art Generally, a fluorescent lamp for illumination is constructed by forming a light emitting layer made of a halophosphate phosphor, a rare earth phosphor or the like on the inner surface of a glass bulb.

For example, in a straight tube 40 watt type fluorescent lamp using a halophosphate phosphor, 2700 to 310 are used.
The brightness of 0 (lm) is obtained, and it is used not only in offices but also in large fields such as large stores, theaters, bathhouses, and underground malls.

In particular, in a large store, a theater, an underground mall, etc. where many people gather, it is necessary to evacuate safely and quickly even if a power failure occurs due to a disaster such as a fire or an earthquake.

Therefore, according to the Fire Defense Law and the Building Standards Law, in addition to general lighting fixtures, large-scale stores, theaters, underground malls, etc. that have a certain space or more and meet a large number of people It is obligatory to install lights and emergency lights.

In these guide lights and emergency lights, for example, a fluorescent lamp is turned on by a commercial power source in a normal state, and in an emergency (during a power failure), a built-in battery is used as a power source and the illuminance of the fluorescent lamp or a light bulb is 1 (Lx). Above and 20 to 3
It is configured to light for 0 minutes or more.

Therefore, in the event of a disaster such as an earthquake or fire, even if the commercial power supply is cut off and general lighting equipment is turned off, the illuminance on the floor is at least 1 (Lx) or more. Therefore, safe and quick evacuation is possible.

However, since these guide lights and emergency lights are expensive, the number of installations thereof is smaller than that of general lighting equipment. For example, in the case of being placed below a wall, such as a guideway light, if it is congested, there is a significant difference in visibility of the guideway light between people close to the wall and people far away. The effect will appear.

On the other hand, in a general home where there is no duty to install a guide light or an emergency light, when a power failure occurs due to a disaster, it is not easy to evacuate smoothly and quickly in the dark, and evacuation of children and the elderly is difficult. May be delayed.

[0010]

Therefore, the applicant of the present invention is
First, a fluorescent lamp having a light emitting layer made of one or more kinds of phosphors on the inner surface of a glass bulb, and a phosphor having long afterglow mixed into the light emitting layer at least 0.2 mg / cm ^2. Suggested.

According to this proposal, by using this fluorescent lamp in the same manner as a general lighting fluorescent lamp, it is possible to identify an object even if 500 seconds have elapsed after the fluorescent lamp was turned off. Illuminance of (Lx) or more (10
The illuminance at points separated by mm) can be obtained, and the function as a guide light and the function as a night light at the time of power failure can be achieved. Therefore, even if the fluorescent lamp is turned off due to a power outage due to a disaster, it is possible to evacuate smoothly and quickly using the afterglow of the fluorescent lamp as an index.

However, since the brightness of this fluorescent lamp in a normal use state is insufficient as compared with that of a general fluorescent lamp for illumination, in a lighting fixture for multiple lights, for example, only one of them is long. When it is replaced with a fluorescent lamp having an afterglow property, there is a problem that the brightness becomes unbalanced and the appearance is deteriorated.

Therefore, an object of the present invention is to provide a luminaire having a relatively simple structure and capable of reducing the imbalance in brightness to the extent that it does not hinder practical use without impairing long afterglow. is there.

[0014]

SUMMARY OF THE INVENTION Therefore, in order to achieve the above-mentioned object, the present invention provides a lighting fixture in which one or a plurality of fluorescent lamps are directly or indirectly supported on the fixture body. At least one of them is a fluorescent lamp exhibiting afterglow characteristics for 10 minutes or more. The second invention of the present invention is the fluorescent lamp, wherein the fluorescent layer has a long afterglow property. It is characterized in that the body is a straight tube type or a curved tube type containing at least 0.2 mg or more per cm ² .

A third aspect of the present invention is a lighting fixture in which a plurality of fluorescent lamps are directly or indirectly supported on a main body of the fixture, and at least one of the fluorescent lamps has an afterglow of 10 minutes or more. A fluorescent lamp exhibiting characteristics and fluorescent lamps exhibiting afterglow characteristics are arranged symmetrically, and the fluorescent lamp has a long afterglow phosphor of at least 0 per cm ² in its light emitting layer. .2 mg
It is characterized in that it is a straight pipe type or a curved pipe type included above.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes a device body, which is fixed to, for example, a ceiling surface.
A light-reflecting surface is usually formed on the lower surface side of the instrument main body 1 (the opposite side of the fluorescent lamp described later), but a reflecting plate of an appropriate shape is used together depending on the shape. For example, four sets of sockets 2 are arranged at predetermined intervals on the lower surface side of the instrument body 1. Further, four fluorescent lamps 3 (3A, 3B, 3C, 3 are provided between the respective sockets 2).
D) is installed. The fluorescent lamp 3 is composed of, for example, a hermetically sealed glass bulb 3a, electrodes arranged at both ends thereof, and a light emitting layer 3b formed on the inner surface of the glass bulb 3a.

Among the fluorescent lamps 3 described above, the light emitting layers 3b of the fluorescent lamps 3A and 3D located on both sides are formed of, for example, a halophosphate phosphor ((Ca ₁₀ (PO ₄ ) ₆ FCl: Sb / Mn).
Etc.) or a rare earth phosphor (Y ₂ O ₃ : Eu, LaPO ₄ :).
Ce / Tb, (SrCaBaMg) ₅ (PO ₄ ) ₃ C
(1: Eu, etc.) or a mixture of two or more thereof. Further, the light emitting layer 3b of the fluorescent lamps 3B and 3C symmetrically arranged with respect to the center XX of the instrument body 1 is further composed of one or more of the above-mentioned halophosphate phosphors and rare earth phosphors. 1cm ^{2 of} phosphor with long afterglow
It is formed by mixing 0.2 mg or more per unit.

The phosphor having a long afterglow property is, for example, a compound represented by the general formula MAl ₂ O ₄ , where M is one or more metal elements selected from the group consisting of calcium, strontium and barium. Is a phosphorescent phosphor having a compound as a mother crystal, and as an activator, europium (E
In addition to u), dysprosium (Dy), neodymium (Nd) and the like are used as coactivators. The phosphor having a long afterglow property may be mixed in the light emitting layer 3b, or at least a part thereof may be replaced.

Although these fluorescent lamps 3 are covered with a cover 4 made of a resin having a light-transmitting property, the cover 4 may be omitted depending on the application. The fluorescent lamps 3 may be arranged such that the ordinary fluorescent lamps 3A and 3D and the long-afterglow fluorescent lamps 3B and 3C are replaced with each other, and all the fluorescent lamps are long-afterglow fluorescent lamps. You can also

According to this embodiment, a general fluorescent lamp 3
Since A, 3D and fluorescent lamps 3B, 3C having long afterglow are symmetrically arranged with respect to the center line XX of the instrument body 1, as compared with general fluorescent lamps 3A, 3D. Even if the fluorescent lamps 3B and 3C having a long afterglow have insufficient brightness, the brightness is well balanced and no discomfort is felt.

Moreover, the fluorescent lamp 3 having a long afterglow property
B and 3C are arranged so as to be adjacent to each other, and the phosphor having a long afterglow property is mixed in the light emitting layer 3b in an amount of 0.2 mg or more per 1 cm ^2, so that even if the fluorescent lamp is turned off. It is possible to maintain the illuminance of 0.05 (Lx) or more that allows the object to be identified for at least 10 minutes or more. For this reason, if it is applied to general lighting equipment and general household lighting equipment in places where the installation of guide lights and emergency lights is obliged by the Fire Service Law and the Building Standards Law, even if a power outage should occur due to a disaster, etc. Since the afterglow of the brightness that can identify the refuge is obtained, the evacuation can be performed smoothly and quickly.

Further, since the light emitting layer 3b is formed by mixing a phosphor having a long afterglow property with a phosphor for general illumination such as a halophosphate phosphor or a rare earth phosphor, a long afterglow is obtained. The brightness can be improved as compared with the case where a fluorescent substance having a property is used alone, and it can be sufficiently put to practical use for general illumination.

Further, although a home lighting fixture is usually equipped with a miniature ball of about 5 W for a night light, the use of the lighting fixture of the present invention makes it possible to omit the miniature ball and reduce the cost of the fixture. Not only that, but also power saving is possible.

FIGS. 3 to 4 show an example of application of the present invention to a lighting fixture for a ring-shaped fluorescent lamp. For example, the fixture main body 5 and a code storage case arranged on the upper surface of the fixture main body 5. −
Power is supplied to the space 6, the ring-shaped fluorescent lamps 7 (7A, 7B, 7C) having different outer diameters, which are concentrically arranged on the lower side of the instrument body 5, and the base terminals of these ring-shaped fluorescent lamps 7. It is composed of a socket 8, a lamp holder 9 for supporting these ring-shaped fluorescent lamps 7, and a translucent shade 10 mounted on the flange portion 5a of the instrument body 5. Of the ring-shaped fluorescent lamps 7, the ring-shaped fluorescent lamp 7A has a structure in which the luminescent layer 7b formed on the inner surface of the glass bulb 7a is longer than a phosphor for general illumination such as a halophosphate phosphor or a rare earth phosphor as described above. A phosphor having an afterglow property is mixed in an amount of 0.2 mg or more per cm ² . The ring-shaped fluorescent lamps 7B and 7C are for general lighting. These ring-shaped fluorescent lamps 7 are symmetrically arranged on the same plane with respect to the center line XX, but they can be arranged three-dimensionally.

According to this embodiment, the same effect as that of the above embodiment can be obtained. However, by providing the ring-shaped fluorescent lamp 7A having a small central outer diameter with long afterglow, it can be easily used as a night light when it is turned off. In addition, since it is possible to illuminate by utilizing the brightness of the other ring-shaped fluorescent lamps 7B and 7C during normal operation, a desired floor surface illuminance can be obtained. The ring-shaped fluorescent lamp 7A having a long afterglow is a fluorescent lamp 7 having a larger outer diameter.
B, 7C may be substituted, or all the fluorescent lamps 7 may be ring fluorescent lamps having a long afterglow.

The straight tube fluorescent lamp and the ring fluorescent lamp described above all have a light emitting layer formed on the inner surface of the glass bulb. For example, an average particle size of 0.1 μm or less is preferable between the glass bulb and the light emitting layer. It is possible to form an ultraviolet reflection layer of 30 to 50 mμm made of alumina (Al ₂ O ₃ ) or magnesia (MgO).

By the way, the light emitting layer is excited by the ultraviolet rays generated by the discharge between the electrodes. Although the phosphor located on the discharge side is often excited, the phosphor located on the glass bulb side away from the discharge path is excited. Excitation efficiency tends to decrease. However, according to this structure, since the ultraviolet rays transmitted through the light emitting layer are reflected by the ultraviolet reflecting layer,
The phosphor located on the glass bulb side can be excited by the reflected ultraviolet rays, and the luminous efficiency can be improved.

The present invention is not limited to the above-mentioned embodiments at all. For example, fluorescent lamps include not only straight tube fluorescent lamps but also ring fluorescent lamps, compact fluorescent lamps,
It can also be applied to compact fluorescent lamps. Examples of the phosphor having a long afterglow include long-afterglow such as europium and dysprosium-activated strontium aluminate phosphors (Sr ₄ Al ₁₄ O ₂₅ : Eu / Dy) in addition to those described in the above examples. Anything with characteristics can be used. Also, in the three-wavelength fluorescent lamp, among three or more types of phosphors,
Substituting one or more types of phosphors with long afterglow,
It can also be added. Furthermore, the light emitting layer has a two-layer structure, and a phosphor having a long afterglow on the glass bulb side,
It is also possible to use phosphors for general illumination, respectively, in the light emitting layer on the discharge side.

[0029]

EXAMPLES Next, the present inventors have found that europium and dysprosium activated strontium aluminate phosphors (Sr ₄ Al) having a long afterglow on the inner surface of the crow bulb and having an emission peak at 510 nm. ₁₄ O ₂₅ : Eu / Dy) is applied to form the first light-emitting layer, and europium-activated strontium-calcium-barium phosphor ((SrCaBaMg) ₅ (having a luminescence peak at 453 nm) ((SrCaBaMg) ₅ ( PO
₄ ) ₃ Cl: Eu), a cerium- and terbium-activated lanthanum phosphate phosphor having an emission peak at 544 nm,
A europium-activated yttrium oxide phosphor (Y ₂ O ₃ : Eu) having an emission peak at 611 nm was added to each of 4
The FL20SS fluorescent lamp was manufactured by mixing in a ratio of 3.9, 23.9 and 32.2% by weight and coating the mixture on the first layer. In addition, the adhesion amounts of the first layer and the second layer are 2.7 and
It was 2.2 mg / cm ² .

When various characteristics of this fluorescent lamp were measured, the total luminous flux was 1271 (Lm), which was 91.4% of the total luminous flux 1390 (Lm) of the conventional fluorescent lamp without the first layer.
Met. Arrange this fluorescent lamp as shown in FIG.
When the illuminance (afterglow characteristic) with respect to the elapsed time after the light was turned off was measured, the results shown in FIG. 5 were obtained. The illuminance was measured by placing an illuminometer at a position 10 mm away from the center of the fluorescent lamp.

As is apparent from the figure, even after 10 minutes have passed since the light was turned off, the afterglow illuminance is 0.2 (Lx), and it is presumed that objects can be sufficiently identified and smooth evacuation is possible.

Further, two fluorescent lamps having a long afterglow property are arranged in the central portion of the main body of the apparatus, and two ordinary fluorescent lamps are arranged outside the fluorescent lamps, but no imbalance in brightness is observed. The light distribution characteristics did not cause any practical problems.

[0033]

As described above, according to the present invention, a general fluorescent lamp and a fluorescent lamp having a long afterglow property are arranged symmetrically with respect to the center line XX of the instrument body 1. Therefore, even if the brightness of the fluorescent lamp having a long afterglow property is insufficient as compared with a general fluorescent lamp, the brightness is well balanced and no discomfort is felt.

Moreover, the fluorescent lamps having a long afterglow property are arranged adjacent to each other, and the phosphor having a long afterglow property is mixed in the light emitting layer in an amount of 0.2 mg or more per cm ² . Thus, even if the fluorescent lamp is turned off, it is possible to maintain the illuminance capable of identifying the object for at least 10 minutes or more.
For this reason, if it is applied to general lighting equipment in places where guidance lights and emergency lights are required to be installed by the Fire Defense Law and the Building Standards Law and lighting equipment for general households, even if a power failure occurs due to a disaster,
Since the afterglow having a brightness that can identify an object is obtained, it is possible to evacuate smoothly and quickly.

Further, since the light emitting layer is formed by mixing a phosphor having a long afterglow property with a phosphor for general illumination such as a halophosphate phosphor and a rare earth phosphor, a long afterglow property is obtained. The brightness can be improved as compared with the case where the phosphor having the above is used alone, and it can be sufficiently put to practical use for general illumination.

Further, although a home-use lighting fixture is usually equipped with a miniature ball of about 5 W for a night light, if the lighting fixture of the present invention is used, the miniature ball can be omitted and the cost of the fixture can be reduced. Not only that, but also power saving is possible.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a side sectional view showing a second embodiment of the present invention.

FIG. 4 is a transverse sectional view of FIG. 3;

FIG. 5 is a diagram showing the afterglow illuminance with respect to the elapsed time after the light is turned off.

[Explanation of symbols]

 1,5 Instrument main body 2,8 Socket 3,7 Fluorescent lamp 3a, 7a Glass bulb 3b, 7b Light emitting layer 4 Cover 9 Lamp holder 10 Cede

Front Page Continuation (72) Inventor Junji Araki 1-4-24 Jomi, Chuo-ku, Osaka-shi, Osaka NEC Home Electronics Co., Ltd.

Claims (4)

[Claims] 1. A lighting fixture having one or a plurality of fluorescent lamps directly or indirectly supported on a fixture body, wherein at least one of the fluorescent lamps has a afterglow characteristic of 10 minutes or more. Lighting equipment characterized by having done. 2. The fluorescent lamp comprises a phosphor having a long afterglow property in a light emitting layer of at least 0.2 per cm ^2.
The lighting fixture according to claim 1, wherein the lighting fixture has a straight pipe shape or a curved pipe shape containing at least mg. 3. A lighting fixture in which a plurality of fluorescent lamps are directly or indirectly supported on the main body of the fixture, and at least one of the fluorescent lamps is a fluorescent lamp exhibiting an afterglow characteristic of 10 minutes or more, and A luminaire characterized in that fluorescent lamps exhibiting light characteristics are symmetrically arranged. 4. The fluorescent lamp comprises a phosphor having a long afterglow in a light emitting layer of at least 0.2 per cm ^2.
The lighting device according to claim 3, wherein the lighting device is a straight pipe type or a curved pipe type containing at least mg.