JP2001325807A - Lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fixture having auxiliary light source suitable for an emergency lighting fixture, preventing confusion during evacuation and confusion or the like in abnormal situations. SOLUTION: This lighting fixture is provided with a main light source 2, a light source cover 3 covering the main light source 2, well shaped recess parts 5a, 5b provided on a part of the inner wall of the light source cover 3 toward an outer wall direction, semiconductor light-emitting elements 4a, 4b housed in the recess parts 5a, 5b. The light source cover 3 includes projecting light emitting surfaces 6a, 6b corresponding to the recess parts 5a, 5b on the outer wall thereof. The bottom part of the well-shaped recess parts 5a, 5b function as an entry surface of light emitted from the semiconductor light emitting elements 4a, 4b, respectively. An auxiliary light source parts 7a, 7b are constructed by a part of the light source cover 3 arranged at the well-shaped recess parts 5a, 5b and semiconductor light-emitting elements 4a, 4b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device with an auxiliary light source suitable for an emergency lighting device or the like which is turned on when an abnormality such as a power failure or a fire is detected.

[0002]

2. Description of the Related Art Conventionally, in emergency lighting equipment, for example, when a power failure occurs at night or when a fire is detected, 30
The security light is turned on for a certain period of time, such as minutes. Further, for example,
In some cases, the evacuation direction can be notified by acting as a guide light or displaying the evacuation direction. Usually, these emergency lighting devices have a storage battery mounted on the lighting device for the main lighting, and turn on a security light by power supply from the storage battery in the event of a power failure.

[0003] Since a cold cathode fluorescent lamp is generally used as a main illumination light source, an emergency lighting device using a cold cathode fluorescent lamp as a security light is known. In this conventional emergency lighting apparatus, at normal time, that is, when the commercial power supply is energized, the cold cathode fluorescent discharge tube is turned on by the commercial lighting circuit, and at the time of a power failure, an inverter including a transistor or the like is used.
Emergency lighting of the cold cathode fluorescent discharge tube as a security light. As is well known, the cold-cathode fluorescent discharge tube performs abnormal discharge or half-wave discharge at the end of life. It is known that, when the end of life is reached, an overcurrent flows through the lighting device and the cold cathode fluorescent discharge tube, and an overvoltage occurs at each part of the lighting device and at both ends of the cold cathode fluorescent discharge tube. Therefore, when the cold cathode fluorescent lamp is in the end-of-life state, the operation of the lighting device is stopped to protect the lighting device, to prevent the overcurrent from continuing to flow, and to prevent the cold cathode fluorescent lamp from being damaged. Then, measures were taken to turn off the cold cathode fluorescent discharge tubes.
Such a concept is the same for emergency lighting equipment.

[0004]

However, in a conventional emergency lighting device, for example, in the case of a power failure due to a fire or the like, even if the emergency lighting device is activated, even if the emergency lighting device is activated, the visibility is reduced. And the location of the emergency exit is not known, or the sense of direction is lost and evacuation becomes difficult.

When a cold cathode fluorescent lamp is used as a light source for main illumination, it may be appropriate to stop supplying power to the cold cathode fluorescent tube at the end of the life of the cold cathode fluorescent tube. . However, when the cold cathode fluorescent discharge tube is used as a security light, there is a problem that the cold cathode fluorescent discharge tube as a security light is turned off in an emergency in terms of safety such as evacuation and guidance. .

[0006] In this conventional emergency lighting apparatus, the lighting circuit is switched to an inverter composed of a transistor or the like at the time of a power failure, so that the size of the device becomes large. Further, there is a disadvantage that an expensive switching circuit is required to switch the high-pressure lamp side, which is expensive. Further, a DC power supply for backup needs to supply an excessive amount of electric power, so that a large-capacity and expensive DC power supply is required.

Further, it is a storage battery that supplies power to the emergency lighting equipment in an emergency (at the time of a power failure). Therefore,
The time during which the cold-cathode fluorescent discharge tube as a security light is turned on is limited to a relatively short time (about 30 minutes). That is,
There is a problem that the backup time becomes short.

The present invention has been made in view of the above-mentioned various problems, and an object of the present invention is to provide an emergency lighting capable of preventing occurrence of confusion at the time of occurrence of an abnormality such as confusion at the time of evacuation. An object of the present invention is to provide a lighting device with an auxiliary light source suitable for the device.

Another object of the present invention is to provide a lighting fixture with an auxiliary light source suitable for an emergency lighting fixture that can maintain reliability at all times and can be reliably turned on.

Still another object of the present invention is to provide a small, inexpensive,
An object of the present invention is to provide a lighting device with an auxiliary light source suitable for an emergency lighting device that does not require a large capacity of a backup DC power supply device.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is characterized in that a main illumination light source, a light source cover for covering the main illumination light source, and a portion of an inner wall of the light source cover extending from an inner wall toward an outer wall. A lighting fixture comprising a well-shaped recess provided by the above-described method and a semiconductor light emitting element housed in the recess. The bottom of the well-shaped recess functions as an incident surface of light output from the semiconductor light emitting device. The portion of the light source cover where the well-shaped concave portion is arranged and the semiconductor light emitting element function as an auxiliary light source portion. This auxiliary light source unit can be used as a nightlight or an emergency security light.
For the light source cover, a milky white acrylic resin generally used can be used.

Here, as the "semiconductor light emitting device", a light emitting diode (LED) or a semiconductor laser can be used.
When the semiconductor light emitting element is used, when the semiconductor light emitting element is housed in the recess (well-shaped recess) of the lighting fixture according to the feature of the present invention, the heat generating action exerts a thermal effect on the light source cover. There is no.

[0013] In particular, in the lighting fixture according to the feature of the present invention, it is preferable that the outer wall of the light source cover further has a projection emitting surface corresponding to the recess. By setting the bottom of the well-shaped concave portion as the light incident surface and outputting the light from the convex portion emitting surface, the output light of the semiconductor light emitting element can be collected or adjusted to a parallel beam. In particular, by outputting a parallel beam from the projection emission surface, the traveling direction can be clearly specified even when smoke is filled during a fire. This is because the collimated beam is scattered by the smoke and its location can be visually recognized.
The output light of the semiconductor light emitting element may be dispersed from the projection emission surface. That is, one of the entrance surface and the exit surface may include a flat surface having an infinite radius of curvature or a shape close to infinity according to the geometric optical requirements. This is because if one of the entrance surface and the exit surface has a predetermined (finite) radius of curvature that is not infinite, the convergence and divergence of light can be controlled. Since the well-shaped recess almost completely covers the main light emitting portion of the semiconductor light emitting device,
It is possible to effectively collect the output light of the semiconductor light emitting device. This is an operation that is impossible with an optical system such as a conventional lens having the same dimensions. That is, the inner wall portion of the well-shaped concave portion other than the incident surface (bottom portion) can also function as an effective light incident portion, so that the light collection efficiency is extremely high. This is equivalent to the case where light is condensed using a lens having an infinite diameter. As described above, according to the auxiliary light source unit according to the features of the present invention, a desired illuminance can be easily obtained without requiring a large number of semiconductor light emitting elements. This illuminance is an illuminance that cannot be achieved when a condensing system is configured for the semiconductor light emitting element with a conventionally known optical system such as a lens. In addition, according to the lighting device according to the features of the present invention, it is possible to easily change the optical path such as divergence and convergence of light and change the focus without changing the package or the mold structure of the semiconductor light emitting device. It is.

In a lighting device according to the present invention, an optical sensor comprising a solar cell for receiving light from a main illumination light source;
It is preferable to further include a control circuit connected to the optical sensor and the semiconductor light-emitting element, incorporating a storage battery (battery), and controlling turning on / off of the semiconductor light-emitting element. Specifically, the power from the photosensor composed of a solar cell may be charged to the storage battery via the backflow prevention diode and the overcharge prevention circuit. That is, an optical sensor for brightness detection is connected in parallel with the storage battery. on the other hand,
A power failure detection relay coil is connected in parallel with the commercial AC power supply. That is, the well-shaped recess forms a series circuit of a semiconductor light emitting element, a storage battery, a contact driven by a relay coil for detecting a power failure, and a contact driven by an optical sensor. The contacts driven by the optical sensor
The voltage or current of the solar cell may be detected. Then, when the commercial AC power supply is not out of power, the contact operated by the relay coil for power outage detection is opened, and the storage battery is charged without turning on the semiconductor light emitting element.
On the other hand, at the time of a power failure of the commercial AC power supply, the contact operated by the relay coil for power failure detection is closed, and when the ambient brightness detected by the optical sensor is equal to or less than a predetermined value, the contact driven by the optical sensor is turned off. Can also be closed to light the semiconductor light emitting device. Since the semiconductor light emitting element emits DC light, an inverter circuit is not required, and the circuit configuration can be simplified. Further, since the semiconductor light emitting element consumes less power, the semiconductor light emitting element as a security light can be turned on for a long time by the storage battery.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.
However, it should be noted that the drawings are schematic, and the dimensional relationships and ratios of the respective members are different from actual ones. Therefore, specific dimensions of each member should be determined in consideration of the following description. In addition, it is needless to say that dimensional relationships and ratios are different between drawings.

(First Embodiment) As shown in FIG. 1, a lighting apparatus according to a first embodiment of the present invention
A light source cover 3 covering the main illumination light source 2, a plurality of well-shaped recesses 5a, 5b,... Provided from a part of the inner wall of the light source cover 3 toward the outer wall. A plurality of semiconductor light emitting elements 4a, 4b,... Housed in a plurality of recesses 5a, 5b,.
Further, a plurality of recesses 5a, 5b,
.. a plurality of projection emission surfaces 6a, 6b,.
...

In the lighting fixture according to the first embodiment,
The bottoms of the plurality of well-shaped recesses 5a, 5b,.
Each of the plurality of semiconductor light emitting elements 4a, 4b,.
-Functions as an incident surface for light output from And
The light source cover 3 and the semiconductor light emitting elements 4a, 4b,... In the portion where the well-shaped recesses 5a, 5b,.
.., A plurality of auxiliary light source units 7a, 7b,.
Is configured. The plurality of auxiliary light sources 7a, 7b,
.. Are periodically arranged at a constant pitch around the light source cover 3. The plurality of auxiliary light sources 7a, 7
.. can be used as nightlights or emergency security lights. For the light source cover 3, a milky white acrylic resin generally used can be used. And the light source cover 3
Are fixed to a mounting plate 1 such as a ceiling plate, a wall surface, or the like by mounting tools 11a, 11b,.... Fixture 11
In FIGS. 1A, 11B,..., the screws are shown, but they may be of a fitting type such as a hooking sealing. Further, instead of a ceiling light or a downlight which is directly mounted on the surface of the ceiling (mounting plate) 1 as shown in FIG. 1 or embedded in the ceiling, a wall light or a bracket which is mounted on a wall or a pillar may be used. Also, the main illumination light source 2
Can be incandescent or fluorescent.

The bottoms of the well-shaped concave portions 5a, 5b,... Are used as light incident surfaces, and the convex-shaped emitting surfaces 6a, 6b,.
・ By outputting light from the semiconductor light emitting element 4
.. can be condensed and emitted as a parallel beam directly below from the ceiling toward the floor. In this way, the projection emission surfaces 6a, 6b,...
By outputting a parallel beam from, the direction of travel can be clearly indicated even when smoke is full during a fire. Because the parallel beam is scattered by the smoke, the location of the parallel beam from the auxiliary light source units 7a, 7b,...

FIG. 2 is an enlarged sectional view showing the vicinity of the auxiliary light source portion 7a of the light source cover 3 according to the first embodiment. Although not shown, the other auxiliary light source units 7b,.
And so on. The light source cover 3 is shown in FIG.
As shown in FIG. 5, the light emitting device includes an incident surface on which light from the semiconductor light emitting element 4a is incident, a convex emission surface 6a from which the light is emitted, and an optical transmission unit connecting the incident surface and the convex emission surface 6a. ing. The light transmission section is formed of a solid transparent to the wavelength of light from the semiconductor light emitting element 4a. The distance between the entrance surface and the projection exit surface 6a can be selected to be about 15 mm to 50 mm. Inside the light source cover 3, there is a well-shaped recess 5a for accommodating the semiconductor light emitting element 4a.
The well-shaped concave portion 5a includes a bottom serving as an incident surface of light from the semiconductor light emitting element 4a, and a cylindrical side wall continuously formed on the bottom. The side wall portion is a semiconductor light emitting element 4a.
Is designed to have an inner diameter that allows the main light-emitting portion to be inserted through a spacer having a thickness of about 0.25 to 0.5 mm.

In the lighting fixture according to the first embodiment, the semiconductor light emitting elements 4a, 4b,.
EDs and semiconductor lasers can be used. LEDs 4a, 4b,
... may be LEDs 4a, 4b, ... molded with a predetermined transparent resin sealing body such as a bullet,
LED 4a molded in a disk type package,
4b,...

An epoxy resin or the like can be used as the transparent resin sealing body. Further, LEDs 4a, 4 in a bare chip state
b, ... may be sufficient. When the LEDs 4a, 4b,... Molded in a disk type package and the LEDs 4a, 4b,... In a bare chip state are mounted in a plurality of well-shaped recesses 5a, 5b,. , And illumination from the brighter auxiliary light source units 7a, 7b,... As described above, the semiconductor light emitting elements 4a, 4
If b,... are used, well-shaped concave portions 5a, 5b,
The semiconductor light emitting elements 4a, 4b,.
Are not thermally affected by the heat generation effect of the light source cover 3. In FIG.
An LED chip 21a disposed on a base integrally connected to the first pin 23a;
Bullet resin mold (resin sealing body) 22a for covering
And a resin-molded LED 4a comprising at least a first pin 23a and a pair of second pins 24a.
It is shown. The first pin 23a is connected to the auxiliary light source wiring 9k (shown in FIG. 2 as being invisible in FIG. 2 and shown in FIG. 1) formed of a transparent conductor via a first lead 25a. Similarly, the second pin 24a is connected to an auxiliary light source wiring 9j formed of a transparent conductor by a second lead 2a.
6a. Examples of the transparent conductor include tin oxide (SnO ₂ ) and tin-added indium oxide (ITO).
Can be used. The first pin 23a and the first lead 25a are solder 33, and the second pin 24a is
Is connected to the lead 26a by a solder 32. Furthermore,
The second lead 26a and the auxiliary light source wiring 9j are connected by solder 32. Although not shown, the first lead 25a and the auxiliary light source wiring 9k are also connected by solder.

FIG. 1 shows a relatively thick pot-shaped light source cover 3, but a thin (flat) structure like a normal ceiling light is also possible. A thin structure such as a general ceiling light has auxiliary light sources 7a, 7b,.
Can be kept away from the main illumination light source 2, and the influence of heat of the main illumination light source 2 can be easily avoided.
It is preferable because a stable operation of b,... is ensured. Also,
If the auxiliary ceiling light sources 7a, 7b,... Are thin ceiling lights that can be far from the main illumination light source 2, the shadows of the auxiliary light source wirings 9k and 9j are inconspicuous. Absent. Also, the LEDs 4a, 4b,
Since the current consumption of... Is small, wiring can be performed with a thin wire of about 0.2 mm to 0.5 mmφ, so that the shadow of the wire can be made substantially invisible, so that the appearance is not spoiled.

The bullet-shaped resin-molded LED 4
The top of the main light emitting portion a has a convex curved surface.
Since the vicinity of the top of the resin sealing body 22a forms a convex curved surface in this manner, light from the LED chip 21a is output downward at a predetermined divergence angle in FIG. Except for the convex curved surface, the bullet-shaped resin-molded LED 4a
Is, for example, a columnar shape having a diameter (outer diameter) of 2 to 10 mmφ. The semiconductor light emitting element 4a including the LED 4a is:
The light source cover 3 is housed in a well-shaped concave portion 5a. The spacer, not shown, may be arranged at a position other than the main light emitting portion of the LED 4a, that is, above the position of the bottom surface of the LED chip 21a. The inner diameter of the well-shaped recess 5a and the outer diameter of the resin sealing body 22a may be substantially the same, and the spacer may be omitted. The LED 4a may be in contact with the bottom (incident surface) of the recess 5a. Generally, in the LED 4a as shown in FIG.
Light emitted from places other than the front end portion (curved surface) becomes a so-called stray light component and does not contribute to illumination. However, in the lighting fixture according to the first embodiment, the bullet-shaped LED 4a is almost completely enclosed in the well-shaped recess 5a of the light source cover 3, so that these stray light components can effectively contribute to illumination. Become. That is, the inner wall portion of the well-shaped concave portion 5a other than the incident surface (bottom portion) can also function as an effective light incident portion. Further, between the semiconductor light emitting element 4a and the well-shaped concave portion 5a of the light source cover 3, the light components reflected at the respective interfaces are multiple-reflected and become stray light components. In the lighting fixture according to the first embodiment, these stray light components are also confined inside the well-shaped concave portion 5a, and may eventually be components that can contribute to illumination. As a result, the light energy of the potential LED chip 21a is substantially equal to the internal quantum efficiency without depending on the light extraction efficiency such as the shape of the resin sealing body 22a and the reflection component between the optical systems. Can be effectively taken out. In this manner, according to the lighting apparatus according to the first embodiment, desired irradiation as a light beam contributing to illumination can be performed without using an excessive number of bullet-shaped LEDs 4a, 4b,. It is possible to secure a luminous flux of an area and easily obtain a desired illuminance.

This illuminance is an illuminance that cannot be achieved by a conventionally known optical system such as a lens. Further, according to the lighting fixture according to the first embodiment, the semiconductor light emitting elements 4a, such as LEDs,
It is possible to easily change the optical path such as divergence and convergence of light and change the focus without changing the package or mold shape of 4b,.... Semiconductor light emitting element 4
.. are preferably light sources that emit light in a specific direction at a predetermined divergence angle. If the divergence angle for emitting light in a specific direction is known, the auxiliary light source units 7a, 7b,.
The optical design such as light condensing and dispersion in... Becomes easy, the radius of curvature of the curved surface at the bottom of the well-shaped concave portions 5a, 5b,. ...
This is because it is easy to select the radius of curvature and the like.

The LED 4, which is the semiconductor light emitting element 4a, 4b,... In the lighting fixture according to the first embodiment.
Since a, 4b,... convert electric energy directly into light energy, they have a characteristic that they are more efficient and do not generate heat when emitting light as compared with incandescent lamps such as halogen lamps or fluorescent lamps. In an incandescent lamp, electric energy is once converted to heat energy, and radiation accompanying the heat generation is used. The conversion efficiency is low in principle, and the conversion efficiency to light does not exceed 1%. . In fluorescent lights,
Electric energy is converted to discharge energy, and similarly, its conversion efficiency is low. On the other hand, LEDs 4a, 4
In b,..., the conversion efficiency can be about 20% or more, and a conversion efficiency of about 100 times or more as compared with incandescent lamps or fluorescent lamps can be easily achieved. Further, the semiconductor light emitting elements 4a, 4b,... Such as LEDs have a long life which can be considered to be semi-permanent, and do not have the problem of flickering like fluorescent light.

As the bullet-shaped LEDs 4a, 4b,... Used for the lighting apparatus according to the first embodiment, LEDs of various colors (wavelengths) can be used. However, for indoor lighting purposes, white LEDs are preferred because they are natural to the human eye. Various structures can be used as the white LED. For example, a type in which a fluorescent material that emits white fluorescence is excited by an LED chip such as blue or ultraviolet light can be used. Further, three LED chips of red (R), green (G) and blue (B) are arranged adjacent to each other so as to be regarded as a point light source and arranged inside the bullet-shaped resin sealing body 22a. (Or three LED chips of R, G, and B may be vertically stacked). From one resin sealing body 22a, corresponding to the LED chip of each color,
A total of six pins may be led out, and the resin sealing body 22a
In this case, six pins may be combined into two as internal wiring, and two pins may be provided as external pins. In this case, if one electrode (ground electrode) is common, four external pins are sufficient. R, G, and B (6, 9
,...) Are mounted inside the bullet-shaped resin sealing body 22a, R, G, and B
By adjusting the light emission intensity of each LED chip, all colors in the visible light region can be selected. Of course, in combination with various phosphors and filters, a color that cannot be obtained by the LED body alone may be obtained.

As shown in FIG. 1, in the lighting fixture according to the first embodiment, an optical sensor 51 for receiving light from the main illumination light source 2, an optical sensor 51 and semiconductor light emitting elements 4a,
4b,... Connected to the control circuit 52. The optical sensor 51 includes a solar cell that receives light from the main illumination light source 2. A control circuit 52 is disposed on the back surface of the mounting plate 1. The mounting plate 1 is provided with through holes, and the electrode terminals 8j and 8k and the signal terminals 53 are used by using the through holes.
Are guided from the front surface of the mounting plate 1 to the rear surface. Electrode terminal,
A part of the light source cover 3 is used for electrical insulation between 8j, 8k and the signal terminal 5. On the front surface side of the mounting plate 1, auxiliary light source wirings 9j and 9k are connected to the electrode terminals 8j and 8k, respectively. An optical sensor is connected to the signal terminal 53 on the front surface side of the mounting plate 1. On the other hand, on the back side of the mounting plate 1, the electrode terminals 8j and 8k, the signal terminals 53
Are connected to the control circuit 52, respectively. The control circuit 52 has a built-in storage battery (battery) and controls turning on / off of the semiconductor light emitting elements 4a, 4b,. Specifically, the storage battery may be charged with the electric power from the photosensor 51 composed of a solar cell via a backflow prevention diode and an overcharge prevention circuit. That is, an optical sensor 51 for detecting brightness is connected in parallel with the storage battery. On the other hand, a relay coil for power failure detection is connected in parallel with the commercial AC power supply. That is, the semiconductor light emitting element 4
a, 4b,..., a circuit (closed loop circuit) in which a storage battery, a contact driven by a relay coil for detecting a power failure, and a contact driven by an optical sensor 51 are connected in series is configured. I have. The contact driven by the optical sensor 51 may detect the voltage or current of the solar cell. When the commercial AC power supply is not out of power (normal), the contacts operated by the power outage detection relay coil are opened, and the semiconductor light emitting elements 4a, 4b,.
・ Charge the storage battery without turning on. On the other hand, at the time of power failure (at the time of abnormality) of the commercial AC power supply, the contact operated by the relay coil for power failure detection is closed. Further, when the ambient brightness detected by the optical sensor 51 is equal to or less than a predetermined value, the contacts driven by the optical sensor 51 are also closed, and the semiconductor light emitting elements 4a, 4b,. Can be done. Since the semiconductor light emitting elements 4a, 4b,... Emit light with direct current, an inverter circuit is not required and the circuit configuration can be simplified. The semiconductor light emitting devices 4a, 4b,.
.. Have low power consumption, and the semiconductor light emitting elements 4a, 4b,...
Can be turned on. Note that a switch with a lamp indicating the position of the switch even when the switch is off at night (hereinafter, referred to as a "firefly switch") is known. As a relay coil for detecting a power failure, a firefly switch that is energized even when the main illumination light source 2 is turned off may be used. Furthermore, the security light may be turned on only when a person is present, for example, by a temperature sensor, an infrared sensor, or the like.

In FIG. 1, if an infrared sensor is further connected to the control circuit, the control circuit is turned on or off when, for example, a person who is a heat source enters or exits, or due to a change in the surrounding thermal phenomenon due to a fire or the like. Or you can.
The infrared sensor, other infrared sensor using a pyroelectric _{effect, Pb x Sn 1-x Te} , the semiconductor infrared sensor having a bandgap infrared region such as Hg _{x Cd 1-x} Te can be used. It is also possible to dope germanium (Ge) with gold (Au) and use the energy of the impurity level.

(Second Embodiment) A lighting fixture according to a second embodiment of the present invention comprises, as shown in FIG.
A light source cover 3 that covers the main illumination light source 2, a well-shaped recess 5a, 5b,... Provided from a part of the inner wall of the light source cover 3 toward the outer wall;
Semiconductor light emitting element 4 housed in a, 5b,.
a, 4b,... Unlike the first embodiment of the present invention, the outer wall of the light source cover 3 does not have a convex emission surface. Others are the same as those of the first embodiment of the present invention, and duplicate description will be omitted.

In the lighting equipment according to the second embodiment,
The bottoms of the well-shaped concave portions 5a, 5b,... Function as incident surfaces of the light output from the semiconductor light emitting elements 4a, 4b,. Then, the well-shaped concave portions 5a, 5
The auxiliary light source units 7a, 7b,... are constituted by the light source cover 3 where the b,... are arranged and the semiconductor light emitting elements 4a, 4b,. The auxiliary light sources 7a, 7b,... Can be used as nightlights or emergency security lights. Unlike the first embodiment,
Since no convex emission surface is formed on the outer wall of the light source cover 3, it is suitable for emitting diffused light, not as a parallel beam.

In the lighting fixture according to the second embodiment, when the semiconductor light emitting elements 4a, 4b,... Are housed in the well-shaped recesses 5a, 5b,. The heat generation does not affect the light source cover 3 thermally.

The auxiliary light sources 7a, 7b,... Provided on a part of the light source cover 3 of the lighting apparatus according to the second embodiment.
According to the semiconductor light emitting devices 4a, 4b,.
The desired illuminance can be easily obtained without requiring a large number of. This illuminance is an illuminance that cannot be achieved by a conventionally known optical system such as a lens.

(Other Embodiments) As described above, the present invention has been described with reference to the first and second embodiments.
The discussion and drawings that form part of this disclosure should not be understood as limiting the invention. From this disclosure, various alternative embodiments, examples, and operation techniques will be apparent to those skilled in the art.

For example, the lighting apparatus may be a combination of the first and second embodiments described above. In particular,
The auxiliary light source unit having the convex emission surface described in the first embodiment and the auxiliary light source unit not having the convex emission surface described in the second embodiment are alternately arranged, and a parallel beam and a diffused light are diffused. Both may be emitted.

FIGS. 1 and 3 can be understood as specific sectional views of a structure rotationally symmetric with respect to a central axis passing through the main illumination light source 2. However, the main illumination light source 2 may be a long cylindrical fluorescent lamp. In this case, the auxiliary light source unit may be arranged on a part of the long rectangular or rectangular box-like light source cover 3.

In particular, in the first embodiment, the auxiliary light source 7
Although the configuration in which a, 7b,... are used as security lights in an emergency has been mainly described, the auxiliary light source unit of the present invention may be a nightlight, an indicator light for displaying specific information, or an aesthetic appearance. Of course, it can be used for other purposes, such as a lamp for increasing the power.

As described above, the present invention naturally includes various embodiments and the like not described herein. Therefore, the technical scope of the present invention is determined only by the invention specifying matters according to the claims that are appropriate from the above description.

[0038]

When the lighting device of the present invention is used for an emergency lighting device, a parallel beam having a high energy density can be emitted from the auxiliary light source portion. But you can specify the direction of travel. Therefore, it is possible to provide a lighting device with an auxiliary light source suitable for an emergency lighting device or the like, which can prevent the occurrence of confusion at the time of occurrence of an abnormality such as confusion during evacuation.

According to the present invention, it is possible to provide a lighting fixture with an auxiliary light source suitable for emergency lighting fixtures and the like which can always maintain reliability and can be reliably turned on.

According to the present invention, it is possible to provide a lighting fixture with an auxiliary light source which is suitable for an emergency lighting fixture or the like which is small and inexpensive and does not require a large capacity of the backup DC power supply.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a schematic configuration of a lighting fixture according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of an auxiliary light source unit of FIG.

FIG. 3 is a schematic sectional view illustrating a schematic configuration of a lighting fixture according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 mounting plate 2 main illumination light source 3 light source cover 4a, 4b semiconductor light emitting element (LED) 5a, 5b concave portion 6a, 6b convex emission surface 7a, 7b auxiliary light source portion 8j, 8k electrode terminal 9j, 9k auxiliary light source wiring (transparent conductive Body) 11a, 11b Fixture 21a LED chip 22a Resin sealing body 23a First pin 24a Second pin 25a First lead 26a Second lead 31, 32, 33 Solder

Claims (3)

[Claims] 1. A main illumination light source, a light source cover covering the main illumination light source, a well-shaped recess provided from a part of an inner wall of the light source cover toward an outer wall, and a semiconductor housed in the recess. A lighting fixture comprising a light-emitting element. 2. The luminaire according to claim 1, further comprising a projection emission surface corresponding to the recess on an outer wall of the light source cover. 3. An optical sensor comprising a solar cell for receiving light from the main illumination light source, a storage battery connected to the optical sensor and the semiconductor light emitting element, and controlling turning on / off of the semiconductor light emitting element. The lighting device according to claim 1, further comprising a control circuit.