JPH0514361B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a luminaire, in particular to a plate-shaped luminaire.

[Conventional technology]

All conventional flat lighting fixtures project light from a light source placed on the back side of the glass plate and irradiate the front of the glass plate, so it is necessary to secure space behind the glass plate to embed the light source. Therefore, the depth of the lighting fixture should be equal to the thickness of the glass plate plus at least the storage space for the light source. Therefore, for example, when it is installed in a narrow space, or when it is desired that the protrusion from the wall be as small as possible, such as a night light installed on the stairs of a home, it is not possible to fully satisfy such requirements. Ta.

[Problems to be Solved by the Invention] The problem to be solved by the present invention is how to realize a thin lighting fixture in view of the above-mentioned prior art. It is thus an object of the invention to provide a luminaire whose thickness is substantially equal to the thickness of the glass plate.

In order to achieve this objective, the applicant first
We focused on embedding the light source within the thickness of the glass plate and projecting light from the lateral direction into the thickness of the glass plate, and created a concept in which this lateral light is radiated externally from the front of the glass plate using a reflective surface. be.

[Means for solving problems]

In order to achieve the above-mentioned problems, a lighting device according to the present invention includes a plate-shaped light passage means whose back surface is a reflective surface, and projects light into the passage means in a direction substantially parallel to the surface of the plate. a plurality of recesses recessed from the back side to the front side for reflecting light and emitting it from the front surface of the passage means, each of the recesses having at least one light source; The light beams included in the projected area are arranged in a predetermined pattern so that they do not overlap with each other.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The lighting device according to the present invention basically comprises a glass plate 11 constituting passage means and a light source 33. The plate glass 11 is preferably a flat plate, but may be a curved plate depending on the purpose of use. In addition, its external outline may be rectangular, circular, or
It can be oval, polygonal, or any other shape. A reflective surface (mirror surface) 13 is formed on the back side of the glass plate 11 to reflect light passing through the interior of the glass plate 11. A large number of inward depressions 15 are also formed on the back surface of the glass plate 11. The shape of the depression 15 can be any shape such as a pyramid, a hemisphere, or an irregularly uneven shape. Furthermore, the shape, size, and depth of all the depressions may be the same or may be irregular. The depressions 15 can be manufactured in the same manner as in the case of concavo-convex glass such as ordinary window glass.

According to the present invention _, as shown in _{FIG .}
S ₄ ... are arranged so as not to overlap each other. That is, only one depression 15 exists within each light beam S ₁ , S ₂ . This is to ensure that each light beam reaches its respective depression. Preferably, the depressions are arranged so that the distances each light beam reaches are different from each other. By doing so, light will be illuminated from the entire glass plate. Alternatively, by intentionally arranging the recesses 15 locally, for example, only the center or only the four corners of the glass plate 11 can be illuminated. In this way, the arrangement pattern of the depressions 15 can be arbitrarily determined from the viewpoint of decorative consideration or illuminance.

As shown in FIGS. 2 and 3, the light beam from the light source 33 hits the depression 15 and is reflected there.
is injected to the outside from the front of the The angle of the depression 15,
By appropriately changing the height, shape, and size, the light emission position and direction can be changed. In general, for example, irregular lighting is considered to have a greater decorative effect than regular lighting. is preferable.

According to the invention, the light source 33 is integrated in a recess 21 formed in one side of the glass plate 11. As a light source, for example, a halogen lamp, which is small but has a large amount of light, can be used. The lamp 33 has a male threaded shaft 34 that is screwed into a screw hole 37 of a holder 35 in order to be replaceable. It is now electrically connected. The holder 35 itself is removably press-fitted into the recess 21 of the glass plate 11, for example. Alternatively, a nut member (not shown) may be fixed at the entrance of the recess 21, and the holder 35 may be screwed into the nut member.

The reflective surface on the back side of the glass plate can be formed, for example, by coating the entire surface with aluminum foil. The aluminum foil 13 is also coated inside the depression 15, thereby making the slope of the depression 15 an effective reflective surface. Furthermore, the outermost layer of the back surface of the glass plate 11 is covered with aluminum foil 1.
3 can also be covered with a reinforcing glass layer 22. The glass plate 11 may be frosted glass, frosted glass, or transparent glass, or the decorative effect can be further enhanced by applying appropriate coloring or drawing a pattern or picture on the front surface of the glass plate 11.

As the light source 33, an ordinary miniature light bulb or a fluorescent lamp can be used instead of a halogen lamp.
Further, the thickness of the glass plate 11 can be, for example, about 5 mm.

Furthermore, according to the present invention, it is also possible to have a symmetrical shape in which the light sources 33 are provided on both sides of the glass plate 11, as shown in FIG. In this case, the depressions do not necessarily have to be arranged symmetrically, but the condition that the light beams included in the projected area of the depressions with respect to the corresponding light source do not overlap with each other is satisfied.

As shown in Figure 4, the depressions are connected to the luminous flux of adjacent depressions.
By arranging S ₁ , S ₂ , S ₃ , S ₄ ... so that they border without gaps, it is possible to increase the arrangement density of the recesses, and the luminous flux from the light source can be used effectively, reducing the overall illuminance as a lighting fixture. can be increased.

FIG. 6 shows yet another embodiment of the present invention, in which the light passage means is a holder 35.
A pair of thin glass plates 11A, 1 separated by
1B, these glass plates 11A, 1
The space 26 between 1B is filled with air or inert gas. The thickness W of the holder 35 approximately corresponds to the thickness of the glass plate 11 in the embodiment shown in FIGS.
A depression 15 is formed on the inner surface of the rear glass plate 11A. The recess 15 may be formed integrally with the glass plate 11A, or may be formed as a separate component from the aluminum foil 13 and fixed to the glass plate 11A. When forming the recess 15 directly on the glass plate 11A, it is necessary to coat the back surface of the glass plate 11A with a suitable material so as to make it a reflective surface. The rest of the structure is the same as the embodiment shown in FIGS. 1-4.
It goes without saying that in the embodiment shown in FIG. 6, the light sources may be placed on both sides as shown in FIG.

The glass plates 11, 11A, 11B may be made of heat-resistant plastic or porcelain instead of glass.

〔Effect of the invention〕

As described above, according to the present invention, the light source projects light into the optical path from the side of the plate in a direction substantially parallel to the surface of the plate, unlike the conventional method in which light is projected from the back of the glass plate. The dimension in the glass plate thickness direction can be made smaller than that of the glass plate. Furthermore, since the projected light is emitted from the front of the plate to the outside through the many depressions formed in the plate, for example, by making a hat equivalent to a conventional desk lamp using the glass plate of the present invention, it can be used as a light bulb. You can get a desk lamp with no Kasabe. Furthermore, the lighting fixture of the present invention can be used as an interior light attached to the ceiling of an automobile, a wall light for home use, or a night light, and is extremely useful as a small-sized lighting fixture with a large decorative effect.

[Brief explanation of the drawing]

FIG. 1 is a front view of the lighting equipment according to the present invention, and FIG.
3 and 3 are cross-sectional views taken along lines - and - in FIG. 1, FIG. 4 is a diagram illustrating the arrangement relationship between the luminous flux and the depression in the present invention, and FIG. 5 is a modified embodiment of FIG. 1. FIG. 6 is a diagram similar to FIG. 2 showing another embodiment of the present invention. 11... Glass plate, 13... Reflective surface, 15... Hollow,
33...Light source.

Claims (1)

[Claims] 1 comprising a plate-shaped light passage means whose back surface is a reflective surface, and at least one light source that projects light into the passage means in a direction substantially parallel to the surface of the plate; is provided with a large number of depressions recessed from the back side to the front side, which reflect the light and make it exit from the front surface of the passage means, and these depressions are arranged so that the light beams contained within the projected area of each of the depressions do not overlap with each other. A lighting fixture characterized by being arranged in a predetermined pattern.