JPS5919601B2 - lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting device that uses light propagated within a light guide as a light source, and in particular, to a lighting device that uses light propagated within a light guide as a light source, and in particular, a method for effectively diffusing light propagating within a light guide for illumination. Regarding lighting equipment.

Recently, we have entered an era of energy conservation, and research and development on the effective use of solar energy is being actively conducted in various fields.

When using solar energy, there is no need to convert solar energy into electrical energy, thermal energy, etc.
If you use it as 5 light energy for indoor lighting etc.
It is clear that there is no conversion loss and it is the most efficient.
Conventionally, solar energy collected outdoors is guided through a light guide to a location requiring illumination, such as indoors.

However, when light is emitted from the end face of the light guide, the spread angle of the light is approximately 45°, resulting in a spot light source, which is not necessarily satisfactory for softly illuminating a wide area.

＼ The present invention was made in view of the above-mentioned circumstances,
In a lighting device that uses light propagated through a light guide as a light source, the light emitted from the light guide is effectively diffused so that a relatively wide area can be illuminated with soft light.

FIG. 1 is a side sectional view for explaining one example of the lighting equipment according to the present invention, and FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, where 1 is a light guide; 2 is a semi-transparent hollow body,
3 is a first closing member for closing one end of the hollow body 2; 4 is a second closing member for closing the other end of the hollow body 2;
The closing member 5 is a guide introduction hole provided approximately at the center of the first closure member 3, and the guide introduction hole 5 is hollow or is closed with a transparent body 6 if necessary.

The other end of the light pipe 1 is connected to a solar collector (not shown), and the light collected by the solar collector is emitted through the light pipe 1 into a translucent hollow body 2;
For example, it is reflected repeatedly within the hollow body as shown in the figure, and a part of it is emitted to the outside each time it is reflected by the semi-transparent body part,
Illuminates the entire room with soft light.

According to the present invention, as shown in the figure, the second closing member has a transparent or translucent central portion and a reflective surface 7 at the riverside portion. Most of the light that has arrived is reflected by the reflective surface 7 and travels in the opposite direction, and in this case, as described above, a portion of the light goes outside each time it is reflected by the semi-transparent body part of the hollow body. The light is emitted, thereby illuminating the entire room with a softer light.

Moreover, in this embodiment, since the central part of the second closing member is configured to be transparent or semi-transparent, the light emitted from the light guide 1 in a substantially parallel manner is emitted to the outside through the transparent or semi-transparent part. Therefore, the light reflected by the second closure member is not introduced into the light guide 1, and therefore the light reflected by the second closure member is not introduced into the light guide 1.
There is no risk that the light will propagate in the opposite direction inside the camera and burn out the lenses of the solar collector (not shown).

FIG. 3 is a side sectional view for explaining another embodiment of the present invention, and in this actual case, the entire second closing member 4 is made into a reflective surface, and the reflective surface of the second closing member is is configured in an arc shape (convex or concave), and even with this configuration, the same effect as the embodiment shown in FIG. Moreover, the lens of the sunlight collecting device can be prevented from being burned out.

In this case, in the embodiments shown in FIGS. 1 and 3, if the first closing member is the reflecting surface 8, soft light can be produced more effectively.

FIG. 4 is a side sectional view for explaining still another actual case of the present invention, and FIG. 5 is a sectional view taken along the line ■-V in FIG. A part of the is made into a reflective surface 9. In this way, the brightness in a specific direction can be brightened or darkened, but this is explained above in connection with Figs. It will be easily understood that it is applicable to both of the luminaires described.

FIG. 6 is a side sectional view for explaining still another actual case of the present invention, and FIG. 7 is a sectional view taken along the line ■-■ in FIG. is made of a transparent body, and semi-transparent bodies 10 and 1 are formed complementary to the outer circular surface and the inner surface.
In this way, the light from the light source does not directly enter the mouth, and the intensity of the light emitted from the hollow body differs depending on the location, making it suitable for decorative lighting. .

Note that it is easily understood that the first closing member may be purchased as a transparent body, and the first closing member may be provided with a semi-transparent body complementary to the above-mentioned one.

As is clear from the above description, according to the present invention, for example, sunlight transmitted through the light guide can be effectively diffused to illuminate a relatively wide area with soft light.

Further, according to the present invention, since the light reflected by the second closing member is not introduced into the light guide, for example, a lens or the like disposed at the end (not shown) of the light guide 1 is prevented from being introduced into the light guide. There is no need to worry about being burned out by the light traveling backwards through the body.

Furthermore, according to the present invention, since the light from the light guide is diffused within the sealed container, it is possible to prevent performance deterioration due to the intrusion of dust and the like, and to prevent the danger of heat generation in the dust part. By filling the airtight container with nitrogen gas or the like, oxidation of the reflective surface can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view for explaining an embodiment of the lighting equipment according to the present invention, Fig. 2 is a sectional view taken from the line U-■ in Fig. 1, and Figs. 3 and 4 are respectively A side cross-sectional view for explaining another embodiment of the present invention, FIG.
6 is a side sectional view for explaining still another embodiment of the present invention, and FIG. 7 is a sectional view taken from line -V.
It is a sectional view taken along the line -■. DESCRIPTION OF SYMBOLS 1: Light guide, 2: Hollow body, 3: Curved first closing member, 4: Second closing member, 5
. . . Light guide introduction hole, 7 to 9 . . . Reflective surface, 10.11.4- Semitransparent body.

Claims (1)

[Claims] 1. A semi-transparent hollow cylindrical body, a first closing member that closes one end of the hollow cylindrical body, and a second closing member that closes the other end of the hollow cylindrical body. a closing member, the first closing member having a guide body introduction hole in the center, and the second closing member having a transparent or semi-transparent center and a reflective surface at the periphery. Lighting equipment characterized by: 2. The lighting device according to claim 1, wherein the inner and outer surfaces of the hollow cylindrical body are complementary to each other as a light-diffusing surface and a light-transmitting surface. 3. The lighting device according to claim 1 or 2, wherein the first closing member is a reflective surface. 4. The lighting device according to claim 1 or 2, wherein the inner and outer surfaces of the first closing member are complementary to each other as a light-diffusing surface and a light-transmitting surface. 5 a semitransparent hollow cylindrical body, a first closing member that closes one end of the hollow cylindrical body, a second closing member that closes the other end of the hollow cylindrical body, and the first closing member that closes the other end of the hollow cylindrical body; A lighting device characterized in that the first closing member has a guide introduction hole in the center thereof, and the second closing member is configured as a reflective surface formed in an arcuate surface. 6. The lighting device according to claim 5, wherein the inner and outer surfaces of the hollow cylindrical body are complementary to each other as a light-diffusing surface and a light-transmitting surface. 7. The lighting device according to claim 5 or 6, wherein the first closing member has a reflective surface. 8. The lighting device according to claim 5 or 6, wherein the inner and outer surfaces of the first closing member are complementary to each other as a light-diffusing surface and a light-transmitting surface.