JP2004214095A - Airway beacon light - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airway beacon light capable of assuring a predetermined brightness and light distribution, even if the projecting height from ground is limited. <P>SOLUTION: The light body 14 is mounted on a base embedded in the ground, and a part of the light body 14 is projecting from the ground. Inside the light body 14, an ultraviolet light LED 15 for emitting ultraviolet light is housed, and a phosphor 17 to which ultraviolet light is radiated from the ultraviolet light LED 15 is attached to a prism 16. When the ultraviolet light from the ultraviolet LED 15 is radiated to the phosphor 17, the phosphor 17 emits from the light body 14 through the prism 16 a light having a narrow vertical width in the elevation direction and a wide horizontal width in right and left direction, allowing a certain brightness and light distribution to be assured even if the projecting height from the ground is limited. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedded type of aeronautical traffic light which is embedded in a runway or a taxiway at an airport and displays a traffic division or the like.
[0002]
2. Description of the Related Art Recessed aerial beacon lights are used by forming a base on a runway or taxiway of an airport and mounting a light body on the base. The base is formed to be located underground. Usually, an adjustment ring is provided between the base and the lamp, and the direction of installation of the lamp is adjusted by the adjustment ring. If the embedding depth is limited, a lamp may be directly installed on the base.
[0003]
In such an aerial beacon light, an adjustment ring or a light body provided on a base is exposed on the ground surface, and a group of a plurality of aerial beacon lights is installed on an airport runway or taxiway, Lights up at a predetermined brightness to provide visual guidance for taking off, landing and traveling of the aircraft.
[0004]
Halogen bulbs or LEDs are used for the light emitting portion of the lamp body, and the ground surface is illuminated via a prism.
[0005]
On the other hand, as a light emitting unit, there is a surface emitting LED light source using an ultraviolet LED, and a phosphor attached to a reflector is irradiated with ultraviolet light from the ultraviolet LED. There is one that does not cause leakage (for example, see Patent Document 1).
[0006]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2001-243821 (FIG. 1)
[0007]
However, in the case of an aerial sign lamp, since it is used buried in the ground, there may be a case where the height of protrusion from the ground is limited. In this case, the size of the light emitting unit needs to be relatively small, and it may be difficult to arrange the halogen bulbs or LEDs with directionality in order to properly irradiate the ground surface. In other words, the halogen bulb cannot be arranged directly toward the prism, or if LEDs are arranged directly toward the prism, the number of LEDs that can be used effectively is limited, and a predetermined brightness can be obtained. May not be.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide an aeronautical beacon light capable of securing a predetermined brightness and light distribution even when the height of the protrusion from the ground is limited.
[0009]
According to a first aspect of the present invention, there is provided an aeronautical signage lamp which is mounted on a base buried in a road and partially provided so as to protrude from a road surface; A UV LED housed inside the LED and outputting UV light; a UV light which is disposed so as to be irradiated with the UV light from the UV LED; And a prism provided to radiate to the outside.
[0010]
In the present invention and the following inventions, definitions and technical meanings of terms are as follows unless otherwise specified.
[0011]
An aerial sign lamp has a lamp body formed of, for example, a high-strength aluminum alloy casting, and is mounted on a base buried in the road by directly supporting the entire lamp body at a flange portion of the lamp body or via an adjustment ring. You. A light emitting unit is provided inside the lamp body. The light emitting section is formed of an ultraviolet LED and a phosphor attached to the prism, and light from the light emitting section is emitted to the outside through a prism provided on an upper part of the lamp body. The phosphor is attached to the incident surface side of the prism to which the ultraviolet rays from the ultraviolet LED are irradiated, and the phosphor emits light when the ultraviolet rays from the ultraviolet LED are irradiated on the phosphor. The prism polarizes the light emitted from the phosphor into narrow light in the vertical direction and narrow horizontal light in the elevation direction, and radiates the light outside the lamp body.
[0012]
According to the present invention, since the light emitted to the outside is emitted from the phosphor, it is not necessary to consider the directionality of the arrangement of the ultraviolet LEDs. Accordingly, a predetermined number of ultraviolet LEDs can be arranged even in a narrow space inside the lamp body, since the height of the projection of the lamp body is limited, so that a predetermined brightness can be secured.
[0013]
An aerial signage lamp according to the invention of claim 2 is a lamp body attached to a base buried in a road and partially provided so as to protrude from a road surface; and is housed inside the lamp body and outputs ultraviolet rays. An ultraviolet LED; a phosphor adhered to the inner surface of the lamp body to which the ultraviolet light of the ultraviolet LED is irradiated; and a prism which emits visible light converted by the phosphor to the outside. Features.
[0014]
The present invention is different from the first aspect in that the phosphor is attached to the inner surface inside the lamp body to which the ultraviolet rays of the ultraviolet LED are irradiated, instead of the phosphor on the incident surface side of the prism. According to the present invention, the position where light is emitted is the inner surface inside the lamp body, but the emitted light is adjusted by the exit angle of the prism and radiated to the outside, so that the same effect as in claim 1 can be obtained.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an explanatory view of an aeronautical sign light 11 according to an embodiment of the present invention. FIG. 1A is a plan view of the aerial sign light 11, and FIG. FIG. A base (not shown) is formed on the runway or taxiway of the airport, and adjustment rings 12a and 12b are mounted on the base with bolts 13a. Then, the lamp body 14 is mounted on the upper part of the adjustment ring 12a with the bolt 13b.
[0016]
An ultraviolet LED 15 is provided inside the lamp 14, and a prism 16 for emitting light to the outside is provided above the lamp 14. Further, a phosphor 17 is attached on the incident surface side of the prism 16 to which the ultraviolet rays from the ultraviolet LED 15 are irradiated, and the phosphor 17 emits light when the ultraviolet rays from the ultraviolet LED 15 are irradiated to the phosphor 17. The light emitted from the phosphor 17 passes through the prism 16 and is polarized outside the lamp body 14 in the elevation direction with a narrow vertical width and wide horizontal light to be radiated to the outside of the lamp body 14, and the light passes through the road surface of the runway or taxiway. Light up.
[0017]
In general, an aeronautical beacon lamp includes a prism 16 in a light-emitting portion, and the light emission from a light source located below the ground inside the lamp body 14 is adjusted by the emission angle of the prism 16. This is to make it possible to reduce the protruding height from the ground by using the prism 16. Therefore, in the embodiment of the present invention, the phosphor 17 is attached to the incident surface side of the prism 16 and the light source is the ultraviolet LED 15. Then, the light is emitted by the phosphor 17 to ensure the directionality of the light to be radiated to the outside irrespective of the arrangement position of the ultraviolet LED 15 as the light source.
[0018]
The phosphor 17 is a mixture of one or more of a phosphor R that emits red light, a phosphor G that emits green light, and a phosphor B that emits blue light when irradiated with ultraviolet light. I do. The phosphor R uses, for example, YVO ₄ : Eu, Bi having a peak wavelength of 619 nm, the phosphor G uses, for example, Y ₂ SiO ₅ Ce, Tb having a peak wavelength of 543 nm, and the phosphor B uses, for example, a peak wavelength of 450 nm. BaMgAl ₁₆ O ₂₇ : Eu is used. By appropriately mixing these, various luminescent colors can be obtained.
[0019]
In the above description, the phosphor 17 is attached to the incident surface side of the prism 16, but may be attached to the inner surface inside the lamp body to which the ultraviolet rays of the ultraviolet LED 15 are irradiated.
[0020]
In this case, the position where the light is emitted is on the inner surface of the interior of the lamp body 14, but the emitted light is adjusted by the exit angle of the prism 16, so that the light radiated to the outside can keep a predetermined directionality. it can.
[0021]
As described above, according to the embodiment of the present invention, since the light emitted to the outside is emitted from the phosphor 17, there is no need to consider the directionality of the arrangement of the ultraviolet LED 15, and the ultraviolet LED 15 It is not necessary to face the incident surface. Therefore, the number of the ultraviolet LEDs 15 as the light source can be provided for the projection area larger than the incident surface.
[0022]
Also, by appropriately selecting the phosphor, it is possible to provide an aerial sign lamp having light of various emission colors. That is, the type of the phosphor can be changed, and the light emitted to the outside can be set to a desired emission color. For example, a mixture of one or more of a phosphor R that emits red light, a phosphor G that emits green light, and a phosphor B that emits blue light when irradiated with ultraviolet light is used. Thereby, an appropriate emission color can be appropriately selected according to the purpose of use of the aeronautical sign lamp.
[0023]
【The invention's effect】
According to the first aspect of the present invention, since the light emitted to the outside is emitted from the fluorescent material, it is not necessary to consider the directionality of the arrangement of the ultraviolet LED. Even in a narrow space, a predetermined number of ultraviolet LEDs can be arranged. Therefore, a predetermined brightness can be secured.
[0024]
According to the second aspect of the invention, the light emission position is on the inner surface inside the lamp body, but the emission is adjusted by the exit angle of the prism and radiated to the outside, so that the same effect as the first aspect is obtained. .
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an aeronautical sign light according to an embodiment of the present invention.
[Explanation of symbols]
11: Aviation sign light, 12: Adjusting ring, 13: Bolt, 14: Lamp body, 15: Ultraviolet LED, 16: Prism, 17: Phosphor

Claims (2)

A lamp body mounted on a base buried in the road and partially provided so as to protrude from the road surface;
An ultraviolet LED that is housed inside the lamp body and outputs ultraviolet light;
A prism disposed so as to be irradiated with ultraviolet rays from the ultraviolet LED, a phosphor attached to an irradiation surface thereof, and a prism provided to emit visible light converted by the phosphor to the outside;
An air traffic sign light comprising: A lamp body mounted on a base buried in the road and partially provided so as to protrude from the road surface;
An ultraviolet LED that is housed inside the lamp body and outputs ultraviolet light;
A phosphor adhered to an inner surface of the lamp body to which the ultraviolet LED is irradiated with ultraviolet rays;
A prism that emits visible light converted by the phosphor to the outside;
An air traffic sign light comprising:

Images