JPH10255523A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire which, even if a glass bulb is damages, can provide a predetermined long afterglow property and brightness of a practically admissible degree, using a relatively simple constitution. SOLUTION: This luminaire includes a luminaire main body 1, fluorescent lamps 2 whose positions are in a predetermined relation to the luminaire main body 1, and a panel 3 made of a light transmissive resin. A phosphor 4 having a long afterglow property is mixed and dispersed in the panel 3 within the range of 1-50% of the panel weight and in the range of 0.7-35r<2> (g) in relation to the distance (r) from the panel 3 to a desired part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device,
In particular, the present invention relates to an improvement in a lighting fixture that exhibits afterglow that allows an object to be identified even after 10 minutes or more, for example, after the fluorescent lamp is turned off.

[0002]

2. Description of the Related Art In general, a lighting apparatus includes, for example, a gutter-shaped apparatus main body and a fluorescent lamp arranged in a predetermined positional relationship with the main body, and a resin-made milky white panel or the like below the fluorescent lamp. A cover and the like are arranged.

[0003] The lighting fixtures are used for various purposes. For example, many lighting fixtures using FL40 type fluorescent lamps are used as construction tools not only in offices but also in large stores, theaters, baths, underground shopping centers, and the like. Used in a wide range of fields.

[0004] By the way, since many people gather in large stores, theaters, underground shopping centers, and the like where such lighting equipment is frequently used, if a power outage occurs due to a disaster such as a fire or an earthquake, a panic condition may occur. It is expected that an unexpected accident will occur.

[0005] Accordingly, in the Fire Services Act and the Building Standards Act, large stores, theaters, underground shopping centers, and the like that have a certain space or more and satisfy the conditions such as a large number of people gather, besides general lighting equipment, Installation of lights, emergency lights, etc. is required.

[0006] For these guide lights and emergency lights, for example, the fluorescent lamp is turned on by a commercial power supply in a normal state, and the illuminance of a fluorescent lamp or a bulb is 1 (Lx) using an internal battery as a power supply in an emergency (during a power failure). The lamp is turned on for at least 20 to 30 minutes.

[0007] Therefore, even in the event of an emergency, even if the commercial power supply is cut off and general lighting fixtures are turned off, the illuminance on the floor surface is at least 1 (Lx) or more. Rapid 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]

SUMMARY OF THE INVENTION Accordingly, the applicant has
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. (See Japanese Patent Application No. 7-204369).

According to this proposal, by using this fluorescent lamp in the same manner as a general lighting fluorescent lamp, it is possible to obtain an illuminance capable of identifying an object even after 500 seconds have elapsed after the fluorescent lamp has been turned off. In addition, it functions as a guide light or a security light or a nightlight when a power failure occurs.

However, in the event of an emergency or the like, if the fluorescent lamp falls out of the lighting equipment or is damaged or scattered by an impact, the function of an induction lamp based on the long afterglow characteristics of the fluorescent lamp may occur. There is a problem of being damaged.

In addition, the brightness of this fluorescent lamp in a normal state cannot be obtained as high as that of a general fluorescent lamp for lighting, so that it is applied to large stores, theaters, underground shopping centers, and the like as described above. In this case, in order to satisfy the predetermined floor illuminance, it is necessary to increase the number of luminaires to be installed, and there is a problem that an economic burden increases.

[0014] Therefore, an object of the present invention is to provide a predetermined long afterglow even if the glass bulb is broken by a relatively simple structure, and to obtain a brightness comparable to practical use. A lighting fixture is provided.

[0015]

SUMMARY OF THE INVENTION Accordingly, in order to achieve the above-mentioned object, the present invention provides an apparatus main body, a light source arranged to have a predetermined positional relationship with respect to the apparatus main body, and a light transmitting property. A light control member including at least one selected from the group consisting of a resin panel, a cover, a seed, and a glove, wherein the light control member is provided with a phosphor having a long afterglow. 0.7 to 3 in the range of 1 to 50% of the weight of the light control member and the distance r (m) from the light control member to the desired portion.
Characterized by being mixed and dispersed within a range of 5r ² (g),
A second invention of the present invention is characterized in that the light source is at least one or more selected from the group consisting of a fluorescent lamp, a light bulb, and an HID lamp. The phosphor having a long afterglow is used in a range of 1 to 50% of the weight of the light control member and 1.4 to 7 r ² (g) in relation to the distance r (m) from the light control member to a desired portion. )
Characterized by being mixed and dispersed in the range of

[0016]

Next, a first embodiment of the present invention will be described with reference to FIG. In the figure, reference numeral 1 denotes an instrument main body of an implantable instrument embedded in a ceiling A, which has, for example, a U-shaped cross section, and has an inner surface formed as a light reflecting surface. A plurality of straight tube-shaped fluorescent lamps 2 and 2 as a light source are provided inside the fixture body 1.
Are arranged so as to have a predetermined positional relationship with respect to. In addition to the fluorescent lamp 2, a light source, HI
D lamps can also be used. Here, the HID lamp is H
igh I ntensity D ischarge (high intensity discharge) lamp abbreviation generally refer high pressure sodium lamp, a metal halide lamp, a mercury lamp.

The lower opening 1a of the instrument body 1 has a light-transmitting polycarbonate resin, styrene resin,
A panel 3 made of a resin such as an acrylic resin or an ABS resin is disposed, and a phosphor 4 having a long afterglow is provided therein.
Mixing / dispersing in the range of 1 to 50% of the panel weight and in the range of 0.7 to 35 r ² (g) in relation to the distance r (m) from the panel 3 to the desired site (desired irradiated portion) Have been. Note that the recommended mixing / dispersion amount of the phosphor 4 is 1.4.
-7 r < ² > (g), particularly from the viewpoint of the light transmittance and appearance of the panel 3, and further from the viewpoint of the balance between the illuminance and the afterglow illuminance at the time of general illumination.
The range of ² (g) is preferred. Further, the panel 3 is used as a light control member capable of emitting soft light by forming, for example, a milky white color.

The phosphor 4 having long afterglow is, for example, a compound represented by the general formula of MAl ₂ O ₄ ,
M is a phosphorescent phosphor whose mother crystal is a compound comprising at least one metal element selected from the group consisting of calcium, strontium, and barium, and europium (Eu) is used as an activator. Dysprosium (Dy), neodymium (Nd), and the like are used as a coactivator. These phosphors specifically include, for example, 490 nm
And dysprosium-activated strontium aluminate phosphor (Sr ₄ Al)
₁₄ O ₂₅ : Eu / Dy), europium-activated strontium aluminate phosphor having an emission peak at 520 nm (SrAl ₂ O ₄ : Eu) and the like can be used. Although the average particle size of these phosphors is set to, for example, 2 to 12 μm, the afterglow luminance can be increased by selecting a particle size larger than 12 μm.

According to this embodiment, the panel 3 is provided with the phosphor 4 having long afterglow in the range of 1 to 50% of the panel weight and at the distance r (m) from the panel 3 to a desired portion. Since the fluorescent lamp 2 is mixed and dispersed in the range of 0.7 to 35 r ² (g), for example, the fluorescent lamp 2 is continuously turned on for 30 minutes, and the afterglow illuminance (1 m from the panel 3 for 100 seconds after being turned off)
The illuminance at a distant point) is approximately 0.00, at which objects can be identified.
8 (Lx) is obtained, and can be sufficiently used as a sign for evacuation guidance, a nightlight, and the like. However, if the amount of the phosphor 4 having a long afterglow in the panel 3 is less than 1%, a sufficient afterglow illuminance cannot be obtained. Fluidity is impaired, making it difficult to form high-quality panels. In addition, if the mixing amount related to the distance r (m) from the panel 3 to the desired irradiated portion is less than 0.7 r ² (g), sufficient afterglow illuminance cannot be obtained, and conversely, 35 r ² If it exceeds (g), the light transmittance of the panel 3 is undesirably reduced.

The amount of the phosphor 4 mixed and dispersed in the panel 3 is in the range of 1 to 50% of the panel weight and 0.7 in relation to the distance r (m) from the panel 3 to a desired portion. ~ 35
If the distance r to the desired irradiation site is determined in the relationship set in the range of r ² (g), the absolute amount of the phosphor 4 mixed and dispersed in the panel 3 can be made substantially constant. That is, since almost the same afterglow illuminance can be obtained regardless of whether the size of the panel 3 is large or small, it is necessary to increase the amount of the phosphor 4 mixed and dispersed according to the area even if the panel area is enlarged. And an undesired increase in cost can be suppressed.

In particular, if a plurality of phosphors having long afterglow having different afterglow characteristics are mixed and dispersed in the panel 3, for example, europium and dysprosium-activated strontium aluminate having an emission peak at 490 nm. Phosphor (Sr
A mixed phosphor (4) of ₄ Al ₁₄ O ₂₅ : Eu / Dy) and a strontium aluminate activated europium having an emission peak at 520 nm (SrAl ₂ O ₄ : Eu) was used under the above conditions. When the fluorescent lamp 2 is turned off, the green light emits strong light for about 10 minutes after the fluorescent lamp 2 is turned off, but after 10 minutes, the green light emits a predominant luminescent color. In addition to the function as a sign, it is possible to create a fantastic space in which the color tone of the lighting changes in the unlit space. Therefore, by combining with a phosphor that emits a luminescent color such as red in addition to blue and green, further various effects can be achieved.

Further, if this lighting device is used in a place where installation of a guide light and an emergency light is obliged by the Fire Service Law and the Building Standards Law, the power supply may be cut off or an emergency such as a disaster may occur. Even if the fluorescent lamp 2 is damaged, the panel 3 has an afterglow enough to identify an object, so that it can be effectively used as a sign for evacuation.

Further, since no fluorescent material having a long persistence is used for the fluorescent lamp 2 in this lighting fixture, a predetermined brightness can be obtained, and the number of fixtures to be installed must be increased. There is no.

FIG. 2 shows a second embodiment of the present invention, in which a substantially flat appliance body 1A is fixed to a ceiling surface Aa, and an end portion thereof is bent into an L shape. Support portion 1a is formed. A pair or a plurality of pairs of sockets 5 are supported by the device main body 1A, and one or a plurality of fluorescent lamps (light sources) 2 are mounted between the sockets. The instrument main body 1A is covered with, for example, a box-shaped translucent cover-3A.
Is fixed by screwing into the support portion 1b.
A fluorescent substance 4 having a long afterglow is provided on the cover-3A.
0.7 to 35 r in the range of 1 to 50% of the cover weight and in relation to the distance r (m) from the cover-3A to the desired site
It is mixed and dispersed in the range of ² (g).

According to this embodiment, the lighting apparatus is mainly used in ordinary households,
After turning off the lights, it can be used as a nightlight. For this reason, about 5 W of a bead ball conventionally attached to this kind of appliance can be completely omitted, and not only can the appliance cost be reduced, but also power can be saved. Furthermore, in emergency situations, evacuation signs,
It can also be used as guide light.

FIG. 3 shows a third embodiment of the present invention, in which a plurality of lamp holders are provided on the lower surface side of an instrument body 1B formed by abutting a pair of bowl-shaped bodies having a flange portion.
7 is fixed, and the annular fluorescent lamp 2A is mounted. On the other hand, a cord 8 for suspension is led out from the upper surface side of the instrument body 1B, and is connected / coupled to a connector (not shown) on a ceiling surface. Also, on the flange portion of the instrument body 1B, a case 3B made of a resin material such as styrene or acrylic having openings at upper and lower portions is mounted. In this side 3B, a phosphor 4 having a long afterglow is provided in the range of 1 to 50% of the weight of the side and the distance r (m) from the side 3B to a desired portion. 0.7~35r ² (g)
Are mixed and dispersed in the range of

According to this embodiment, this luminaire is used in a general household, and the ring-shaped fluorescent lamp 2 is used.
After A is turned off, it is used as a nightlight. For this,
Conventionally, a bead ball of about 5 W attached to this kind of equipment can be omitted completely, and not only reduction of equipment cost but also power saving can be achieved. In an emergency, it can be used as an evacuation sign or guide light.

In particular, if the phosphor 4 having a long afterglow mixed and dispersed in the side 3B is changed to a mixed phosphor composed of a plurality of phosphors having different afterglow characteristics, it is possible to reduce the time after turning off the light. Since the afterglow color of the side 3B changes with the passage of time, a fantastic space in which the color tone of the illumination changes can be produced in the light-out space. Therefore, by combining with a phosphor that emits a luminescent color such as red in addition to blue and green, further various effects can be achieved.

FIG. 4 shows a fourth embodiment of the present invention, in which a heat-resistant socket (apparatus main body) is provided on a ceiling surface Aa.
5A fixed, bulb (eg krypton bulb)
2B is mounted. The bulb 2B is covered with a globe 3C made of a resin material such as styrene or acrylic. The glow 3C has a long afterglow phosphor 4 in the range of 1 to 50% of the glove weight and 0 in relation to the distance r (m) from the glove 3C to a desired portion. 0.7 to 35 r ² (g).

The present invention is not limited to the above embodiment. For example, the light source may be an HID lamp in addition to a straight tube fluorescent lamp, a ring fluorescent lamp, a compact fluorescent lamp, a compact fluorescent lamp and the like. it can. Phosphors having a long persistence are described in the above examples, europium, neodymium, yttrium-activated calcium aluminate phosphor (CaAl ₂ O ₄ : Eu / Nd / Y), europium, Neodymium-activated barium aluminate phosphor (Ba)
Any material having a long afterglow characteristic such as Al ₂ O ₄ : Eu / Nd) can be used. When these phosphors are mixed, the mixing ratio of each is determined by the particle size, emission range,
It can be set appropriately according to the change mode of the afterglow color tone at the time of turning off. Further, as the light control member, a material other than those described in the above embodiment can be used.

[0031]

Next, the present inventor used a 60 W krypton bulb (2B) as a light source and a milky white polycarbonate resin (280 g) as a globe (3C) in the lighting unit for a bus unit shown in FIG. ), A strontium aluminate phosphor activated with europium and dysprosium having an emission peak at 490 nm (Sr ₄ Al ₁₄ O ₂₅ : Eu /
Dy) was mixed and dispersed in an amount of 11.2 g (corresponding to 4% of the resin weight), the diameter D was set to 228.5 mm, and the heights H1 and H2 were set to 150 and 30 mm. Then, this lighting fixture was fixed to the ceiling surface of a unit bath having a height of 2.5 m and the others set to 1.6 m, and the illuminance at 1 m immediately below the globe with the krypton bulb (2B) turned on. After turning on for 30 minutes, turn off and glove (3C)
When the transition of the afterglow illuminance at a desired portion 1 m away from the measured position was measured, the results shown in Table 1 and FIG. 6 were obtained. For reference, a glob without a phosphor having long afterglow was used as a conventional product.

[0032]

[Table 1]

As is clear from Table 1, the product of the present invention contains 4% of a phosphor having a long afterglow compared to the conventional product, so that the light transmittance is slightly lowered, and 60 W krypton is obtained. The illuminance immediately below when the light bulb (2B) is turned on is slightly less than that of the conventional product, but comparable to practical use.

Also, as is clear from FIG.
The afterglow illuminance at 0 seconds is 0.008 (Lx), which indicates that the level is such that objects can be sufficiently identified. still,
The illuminance capable of identifying an object is approximately 3 × 10 ^{−4 to} 3 × 10 ^−5.
(Lx), in this lighting fixture, after the light is turned off, 1
Even after a lapse of time, the illuminance of 0.001 (Lx) or more was maintained.

Next, the present inventor fixed the amount of the phosphor having a long persistence to the glove to 11.2 g,
The diameter D of the bulb (3C) is enlarged to 310.5 mm, and the illuminance at the time of the general lighting at the point of 1 m and the light after turning off at the point of 1 m are 100
When the afterglow illuminance in seconds was measured, the results shown in Table 2 were obtained. The amount of polycarbonate resin having a diameter D of 310.5 mm was 450 g.

[0036]

[Table 2]

As is clear from Table 2, if the distance from the luminaire to the desired portion (1 m in this embodiment) is constant, the obtained afterglow illuminance is the same whether the globe is large or small. Indicates that

[0038]

As described above, according to the present invention, a fluorescent material having a long afterglow is used for the light control member, and the weight of the light control member is 1 to 5.
In the range of 50%, and because it is mixed and dispersed in a range of 0.7~35r ² (g) in relation to the distance r (m) from Seiko member to a desired site, after turning off the light source, Long time,
It is possible to maintain the afterglow illuminance of the desired portion at an illuminance at which an object can be identified. For this reason, it can be used as an evacuation guidance sign or nightlight.

The amount of the phosphor having long afterglow mixed and dispersed in the light control member is set within the above-described range. Mixed into
The absolute amount of phosphor dispersed can be made substantially constant. That is,
Even if the size of the light control member is large or small, almost the same afterglow illuminance can be obtained. Therefore, even if the area of the light control member is enlarged, the amount of phosphor mixed and dispersed needs to be increased according to the area. In addition, undesired cost increase can be suppressed.

Also, if this lighting equipment is used in a place where the installation of guide lights and emergency lights is obliged by the Fire Service Law and the Building Standards Law, the power supply may be cut off or an emergency such as a disaster may occur. Even if the light source is broken, the light control member has an afterglow enough to identify an object, and thus can be effectively used as a sign for evacuation.

Further, since no fluorescent material having long afterglow is used as the light source in this lighting fixture, a predetermined brightness can be obtained, and it is not necessary to increase the number of installed fixtures. .

[Brief description of the drawings]

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

FIG. 2 is a sectional view of a main part showing a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part showing a third embodiment of the present invention.

FIG. 4 is an essential part cross-sectional view showing a fourth embodiment of the present invention.

FIG. 5 is a sectional view of a main part showing still another embodiment of the present invention.

FIG. 6 is a diagram showing a transition of afterglow illuminance at a point 1 m away from the lighting fixture shown in FIG. 5;

[Explanation of symbols]

 1, 1A, 1B, (5A) Instrument body 2, 2A, 2B Light source 3, 3A, 3B, 3C Light control member 4 Phosphor having long persistence

Claims (3)

[Claims] 1. A group consisting of an appliance main body, a light source disposed so as to have a predetermined positional relationship with respect to the appliance main body, and a panel, a cover, a shade, and a glove made of a transparent resin. A light controlling member including at least one selected from the group consisting of: a phosphor having a long afterglow in the light controlling member in a range of 1 to 50% of the weight of the light controlling member; 0.7-35r in relation to the distance r (m) to the desired site
Lighting equipment characterized by being mixed and dispersed within the range of ² (g). 2. The method according to claim 1, wherein the light source is a fluorescent lamp, a light bulb, a HID.
The lighting fixture according to claim 1, wherein the lighting fixture is at least one selected from the group consisting of lamps. 3. The method according to claim 1, wherein the phosphor has a long persistence in the light control member in a range of 1 to 50% of the weight of the light control member and a distance r (m) from the light control member to a desired portion. 1.4-7
Lighting device according to claim 1, wherein a mixed and dispersed in a range of r ² (g).