JP2010170781A - Indirect lighting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indirect lighting of thin type having a simple structure and easy maintenance. <P>SOLUTION: The indirect lighting 1 is composed of a transparent base plate 3 with sharp cut-out parts 4 cut and provided on a surface side, a light source 2 arranged on right above the cut-out parts 4 on a rear surface side of the transparent base plate 3, an irregular reflection means 5 arranged on the rear surface of the transparent base plate 3 and installed to an area except the light source and the cut-out parts 4 just adjacent to the light source. The peripheral face 4a of the cut-out part 4 is of a slanted shape, and its slanted angle is an angle which performs total reflection of the light emitted from the light source 2 right downward and also performs total reflection of the reflected light by the surface of the transparent base plate 3 and/or is an angle which refracts toward the rear surface side of the transparent base plate 3 by the peripheral part 4a of the adjacent cut-out part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to indirect lighting used as room lighting, and more particularly to a thin indirect lighting having a simple structure and easy maintenance.

  In general, lighting fixtures that illuminate a room are often used with a light source and a semi-transparent cover. However, as a lighting device that is difficult to shadow and is easy on the eyes, light is diffusely reflected by irradiating the ceiling or the like. Indirect lighting is also used to illuminate the room with scattered light. This indirect illumination has poor light usage efficiency and requires a powerful light source to obtain sufficient brightness, so it has not been used so much in the past, but in recent years the light source has become increasingly bright and labor-saving. Indirect lighting is also being reviewed.

As such an indirect lighting fixture, for example, there is a lamp attached to the fixture main body, and a lamp cover formed in a substantially semi-cylindrical shape for shielding or attenuating the lower luminous flux of the lamp, and the lamp cover In the lighting fixture for indirect illumination having a reflecting plate for reflecting the reflected light and the light irradiated by the upper light flux of the lamp and irradiating the lower part of the fixture body with the reflected light, the lamp cover includes the lamp There has been proposed a light beam transmittance that is large at the top and small at the bottom (see Patent Document 1). However, this type of conventional indirect lighting fixture has a complicated shape, is bulky, and is cumbersome to maintain as compared with lighting simply covered with a translucent cover. Since there is a gap between them, the dead bodies of worms gathering in the light source accumulate inside the lamp cover, deteriorating the appearance, and having the disadvantage of having to be frequently cleaned.
In addition, the light obtained by this type of indirect light source has the disadvantages of being monotonous and poor in decorative properties and lacking in a high-class feeling.

JP 2001-332108 A

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object of the present invention is to provide an indirect illumination that solves the problems of the prior art and has a simple structure and is easy to maintain and clean.
Another object of the present invention is to provide indirect lighting that is excellent in decorativeness and rich in luxury.

  The present invention has been made in order to achieve the above object, and claim 1 of the present invention includes a transparent substrate having a sharp notch formed on the front surface side, and the notch on the back side of the transparent substrate. A light source disposed immediately above the light source and irregular reflection means attached to a region on the back side of the transparent substrate excluding the space between the light source and the nearest notch, and the peripheral surface of the notch is an inclined surface. The inclination angle is such that the light emitted directly from the light source is totally reflected and the reflected light is totally reflected on the surface of the transparent substrate, and / or the back surface of the transparent substrate at the peripheral surface of the adjacent cut portion. The indirect illumination is characterized in that the angle is refracted toward the side.

  A second aspect of the present invention further includes indirect illumination according to the first aspect, further comprising condensing means for condensing light emitted from the light source on the cut portion.

  A third aspect of the present invention includes the indirect illumination according to the first or second aspect, wherein the shape of the cut portion is a cusp having a polygonal ridge or a polygonal pyramid.

  According to a fourth aspect of the present invention, the indirect illumination according to any one of the first to third aspects, wherein the pointed cut portions are wedge-shaped, and the point light sources are spaced apart from each other at a predetermined interval. Is the content.

  According to the fifth aspect of the present invention, a plurality of cut portions are arranged in a parallel line shape, a grid pattern, or a triangular grid pattern, and a concavo-convex pattern is arranged in a parallel line pattern, a grid pattern, or a triangular grid pattern. The indirect illumination according to any one of claims 1 to 4, wherein the decorative plate is rotatably provided on the surface side of the transparent substrate.

  According to a sixth aspect of the present invention, the indirect illumination according to the fifth aspect is characterized in that an arrangement cycle of the concavo-convex pattern is different from an arrangement cycle of the notches.

  According to the indirect illumination of the present invention, the light emitted from the light source is totally reflected by the peripheral surface of the nearest notch, and then reflected or refracted by the surface of the transparent substrate or the peripheral surface of the adjacent notch. Since the light is diffused and emitted as diffused light to the irregular reflection means, it can be illuminated with soft light gentle to the eyes. Further, since the transparent substrate and the light source can be arranged close to each other, thin indirect illumination can be obtained. Furthermore, since the light source can be exposed by simply removing the transparent substrate, maintenance is easy, and there is no need to provide a gap as in the lighting fixture of Patent Document 1, and a substantially sealed system can be obtained. Therefore, worms and the like do not invade, and cleaning can be performed simply by wiping the surface side of the transparent substrate.

  If a light collecting means for condensing the light emitted from the light source on the cut portion is provided, almost all of the light emitted from the light source is totally reflected by the peripheral surface of the cut portion, and this reflected light is further reflected on the surface of the transparent substrate. Since the light is reflected and refracted by the peripheral surface of another notch, and enters the irregular reflection means, almost no light is directly emitted without passing through the irregular reflection means, and the burden on the eyes is reduced.

  If the shape of the notch is a cusp with a polygonal ridgeline or a polygonal pyramid shape, or if the pointed notch is a wedge shape and point light sources are spaced apart at a predetermined interval, reflection from the peripheral surface of the notch Since the intensity of light does not become uniform and a light and dark difference occurs, this light and dark difference can be used as a light and dark pattern, resulting in indirect illumination with enhanced decoration and richness of luxury.

A plurality of slits are arranged in parallel lines, grids, and triangles, and a transparent decorative plate with uneven patterns arranged in parallel lines, grids, and triangles on the surface side of the transparent substrate If it is provided so as to be rotatable, the diffusely reflected scattered light is refracted by both the cut portion of the transparent substrate and the uneven pattern of the decorative plate, resulting in a complex light and dark pattern. Since it changes from moment to moment, the decorativeness is further improved.
Further, if the arrangement period of the uneven pattern and the arrangement period of the cut portions are made different, a fine pattern resulting from the difference in period is added, and the decorativeness is further improved.

FIG. 1 is a schematic cross-sectional view of indirect illumination according to the present invention. FIG. 2 is a schematic explanatory view showing an optical path of indirect illumination according to the present invention. FIG. 3 is a schematic explanatory diagram of indirect illumination in which wedge-shaped cut portions are provided in parallel lines. FIG. 4 is a schematic explanatory diagram of indirect illumination in which the shape of the cut portion is a cusp having a polygonal line. FIG. 5 is a schematic explanatory view showing indirect illumination in which square pyramid-shaped notches are provided in a grid pattern. FIG. 6 is a schematic explanatory view showing indirect illumination in which a quadrangular pyramid-shaped cut portion is inclined. FIG. 7 is a schematic explanatory view showing indirect illumination in which square pyramid-shaped notches are provided in a triangular lattice shape. FIG. 8 is a schematic explanatory view showing an example of a transparent substrate used in the present invention. FIG. 9 is a schematic explanatory view showing an example of a decorative plate used in the present invention. FIG. 10 is a schematic explanatory view showing indirect illumination in which the decorative plate of FIG. 9 is provided on the surface side of the transparent substrate of FIG. FIG. 11 is a schematic explanatory view showing a state in which the decorative plate is rotated 10 degrees to the left in the indirect illumination of FIG. 12 is a schematic explanatory view showing a state in which the decorative plate is rotated 45 degrees to the left in the indirect illumination of FIG.

As shown in FIG. 1, the indirect illumination in the present invention is arranged on the transparent substrate 3 having a pointed cut portion 4 formed on the front surface side, and directly above the cut portion 4 on the back side of the transparent substrate 3. Light source 2 and irregular reflection means 5 attached to a region on the back side of the transparent substrate 3 excluding the space between the light source 2 and the nearest notch, and the peripheral surface 4a of the notch 4 is inclined. The angle of inclination is such that the light emitted directly from the light source is totally reflected and the reflected light is totally reflected on the surface of the transparent substrate, and / or is transparent on the peripheral surface 4a of the adjacent cut portion. The angle is refracted toward the back side of the substrate.
In the present invention, the state in which the light source 2 is disposed immediately above the notch 4 is independent of the direction in which the indirect illumination is actually installed, and the notch 4 is, for example, as shown in FIGS. A state in which the light source 2 is arranged immediately on the back side of the provided range. The light emitted immediately below the light source 2 is light emitted from the light source 2 toward the transparent substrate 3 in parallel with the normal line of the transparent substrate 3.

The light source 2 used in the indirect illumination 1 of the present invention is not particularly limited, and examples thereof include a commercially available line light source such as a fluorescent lamp, a point light source such as an incandescent light bulb, and an LED, but can be driven at a low voltage and a low current. An LED is preferable in terms of excellent brightness and responsiveness.
Further, the light source 2 used in the present invention is preferably provided with condensing means 2a for condensing the light emitted from the light source 2 to a cut portion 4 described later, specifically, the back side of the light source 2 Or a condensing lens structure provided on the surface side of the light source 2 can be provided.
In the present invention, it is not preferable that the light emitted from the light source 2 is directly emitted from the surface side of the transparent substrate 3 because the light may directly enter the eye and burn onto the eye. Therefore, a blocking means (not shown) for blocking excess light may be provided so that light emitted from the light source 2 does not directly enter the surface side of the transparent substrate 3.

  The transparent substrate 3 used in the indirect illumination 1 of the present invention is a substantially flat plate-like member having a pointed cut 4 formed on the surface side. The material is not particularly limited, and all resins used for ordinary optical elements such as PMMA (acrylic), PC (polycarbonate), and COP (cycloolefin polymer) can be suitably used.

The notch 4 provided on the surface side of the transparent substrate 3 is pointed, that is, the tip (the deepest part of the recess) is pointed and the peripheral surface 4a is inclined, and is a conical shape. Examples include a polygonal pyramid shape and a wedge shape, but the shape is not limited thereto, and any shape may be used as long as it has a slope around a sharp tip.
Since the light emitted from the transparent substrate 3 is made uneven and used as a bright and dark pattern, the shape of the cut portion 4 is not a monotonous shape such as a conical shape or a wedge shape (see FIG. 3), and the ridge line is a broken line. A shape in which small planes are combined, such as a pointed shape (see FIG. 4) or a polygonal pyramid shape (a quadrangular pyramid shape in FIG. 5), is preferable.
Moreover, when making the cut | notch part 4 into a monotonous shape like a wedge shape, it is preferable to make it change with the arrangement | positioning methods of the light source 2, such as arranging point light sources, such as LED, spaced apart by predetermined spacing.

As shown in FIG. 1, such cuts 4 may be provided at intervals so that the front horizontal surface portion 3 a is formed on the transparent substrate 3, or may be provided without a gap. The arrangement is not particularly limited, and examples thereof include a parallel line shape as shown in FIG. 3, a grid shape as shown in FIG. 5, a triangular lattice shape as shown in FIG.
Moreover, when the shape of the cut portion 4 is a cusp or polygonal pyramid with a ridge line, and the cut portion 4 is arranged with an interval of about 0.5 to 1 times its width, a bright region and a dark region Because the difference in brightness is likely to be large, it becomes more decorative.

  In the present invention, the inclination angle α of the peripheral surface 4a in the notch 4 totally reflects the light emitted from the light source 2 and also totally reflects the reflected light on the surface of the transparent substrate 3 and / or adjacent to it. The angle of refraction toward the back side of the transparent substrate 3 at the peripheral surface 4a of the cut portion 4 to be cut. In addition, the surface of the transparent substrate 3 here refers to both the peripheral surface 4a of the adjacent notch part 4, and the front side horizontal surface part 3a of the transparent substrate 3 in which the notch part 4 is not provided.

In the present invention, the irregular reflection means 5 is attached to the back side of the transparent substrate 3. The irregular reflection means 5 is not particularly limited as long as the reflected light irradiated on the back surface is diffusely reflected as diffused light. For example, a metal thin film may be deposited on the back surface where the entire back surface is roughened. In addition, a white pigment-containing acrylic resin such as Reicure-SL (trade name, manufactured by Jujo Chemical Co., Ltd.) may be applied, and a diffuse reflection sheet such as Lumirror EL-60L (trade name, manufactured by Toray Industries, Inc.) is applied. May be.
However, if the irregular reflection means 5 is installed in the region between the light source 2 and the cut portion 4, the light radiated from the light source 2 to the cut portion 4 is blocked, so the irregular reflection means 5 is not installed in the region. It is necessary to do so.
When the irregular reflection means 5 is not attached to the back surface of the transparent substrate 3 but is provided away from the transparent substrate 3, the light that is regularly reflected (interface reflection) on the back surface of the transparent substrate 3 increases, and the irregular reflection means. 5 is not preferable because not only the light diffusely reflected and the ratio of scattered light decreases, but also the light extraction efficiency deteriorates.

  If comprised as mentioned above, the light radiate | emitted from the light source 2 arrange | positioned just above the notch part 4 was reflected and refracted, for example, as shown in FIG. The light is incident on the irregular reflection means 5 where it is scattered light and then emitted from the surface side of the transparent substrate 3 for irradiation. In the reflection method using the peripheral surface 4a of the cut portion, the light emitted from the light source 2 is selectively totally reflected by the peripheral surface 4a, unlike the conventional method in which a shielding plate or a reflection plate is provided under the light source. Therefore, the useful light emitted from the irregular reflection means 5 is not easily attenuated, and the light use efficiency is high.

  Since the indirect illumination of the present invention is configured in this way, light can be sufficiently diffused even if the distance from the light source 2 to the transparent substrate 3 is short, and scattered light can be emitted from a relatively wide range. Thin and eye-friendly indirect lighting. Further, the light source 2 can be exposed by simply removing the transparent substrate 3 during maintenance such as bulb replacement. Furthermore, a dish-shaped shielding means for shielding and attenuating light directly emitted in the indoor direction or the like as in conventional indirect illumination is not used, and a substantially sealed structure can be obtained. Therefore, there is no possibility that dead bodies of beetles invited to light accumulate on the shielding means, and cleaning is easy.

  When one slit 4 and the light source 2 are observed from the surface side of the transparent substrate 3, it appears that a bright part extends from the periphery of the slit 4 to a certain range. The shape of this bright part is the shape of the slit 4. , Varies by sequence. That is, depending on the shape and arrangement of the notches 4, the difference in brightness between the bright and dark areas may become large. Regardless of the magnitude of this brightness difference, the amount of light to be irradiated does not change and is bright. However, since it is scattered light and does not impose a burden on the eyes, this light / dark difference can be used for decoration of the indirect illumination 1 as a light / dark pattern.

  As a configuration for producing this light and dark pattern, a configuration in which the shape of the cut portion 4 as described above is a cusp or polygonal pyramid shape of the ridge line, or a configuration in which the cut portions 4 are arranged at predetermined intervals. In addition, as shown in FIG. 6, as shown in FIG. 6, a configuration in which the cut portions 4 are inclined with respect to the arrangement direction of the cut portions 4 (vertical and horizontal directions in FIG. 6), or directly above the adjacent cut portions 4. A configuration in which the light sources 2 of different colors (for example, red, blue, and green light sources are sequentially provided) is disposed.

  As yet another configuration, a transparent plate provided with a predetermined concavo-convex pattern 6a can be provided as a decorative plate 6 on the surface side of the transparent substrate 3, thereby providing a finer decoration. That is, for example, when a decorative plate 6 as shown in FIG. 9 is rotatably provided on the surface side of the transparent substrate 3 as shown in FIG. 8, the light diffused by the irregular reflection means 5 is cut off and the uneven pattern 6a. In both cases, the light is refracted in various directions, so that a complicated and fine light and dark pattern is formed. Further, by rotating the decorative plate 6, the formed bright and dark pattern also moves, so that the decorativeness is further increased.

The transparent substrate 3 that can be used in such indirect illumination 1 is not particularly limited as long as the decorative plate 6 can be rotatably provided on the surface side. However, when the cut portions 4 are arranged concentrically with respect to the rotation axis of the decorative plate 6, the bright and dark pattern does not change much even if the decorative plate 6 is rotated. Therefore, the decorative property is not improved so much. The effect of turning freely is halved. Therefore, preferably, the notches 4 may be arranged in a manner based on straight lines such as parallel lines, grids, or triangular lattices. In this case, the change of the light and dark pattern when the decorative plate 6 is rotated is changed. As it becomes larger, the decorativeness is improved.
The transparent substrate 3 shown in FIG. 8 has a grid-like shape in which square pyramid-shaped notches 4 each having a diameter of 82 cm, a thickness of 4 cm, and a circular transparent substrate 3 having a side of 6 cm and a depth of 3 cm are spaced apart by 4 cm. The arrangement period is 10 cm (the length of one side is 6 cm + the interval is 4 cm), and the decorative plate 6 shown in FIG. 9 can be rotatably attached. Moreover, although not shown in figure, the light source 2 which consists of LED which emits red light, blue light, and green light is arrange | positioned in order immediately above each notch part 4. FIG. On the back side of the transparent substrate 3, irregular reflection means 5 (a diffuse reflection sheet manufactured by Toray Industries, Inc., trade name: Lumirror EL-60L) is affixed to the entire surface excluding the portion where the light source 2 is provided. When the indirect illumination 1 is viewed directly, scattered light of red, blue and green can be seen, but the room is illuminated with white light in which these lights are mixed.

The decorative plate 6 is provided so as to be rotatable on the transparent substrate 3 as described above, and is not particularly limited as long as the uneven pattern 6a is provided on the front surface and / or the back surface. However, when the concavo-convex pattern 6a is arranged concentrically with respect to the rotation axis of the decorative plate 6, even if the decorative plate 6 is rotated, the bright and dark pattern does not change so much, so the decorative property is not improved so much. The effect of turning freely is halved. Therefore, it is preferable that the concavo-convex pattern 6a be arranged in a form based on a straight line such as a parallel line shape, a grid shape, or a triangular lattice shape. In this case, the change of the light and dark pattern when the decorative board 6 is rotated is changed. As it becomes larger, the decorativeness is improved.
The decorative board 6 shown in FIG. 9 is provided in a grid pattern with cylindrical concavo-convex patterns 6a having a diameter of 84 cm and a thickness of 1 cm and a circular transparent substrate 3 having a diameter of 6 cm and a height of 3 cm, each having a spacing of 1 cm. The arrangement period is 7 cm (diameter 6 cm + interval 1 cm), and it can be rotatably attached to the transparent substrate 3 shown in FIG.

In addition, if the decorative plate can be rotated by arranging both the cut portion 4 and the concavo-convex pattern 6a in a parallel line shape, a grid pattern, or a triangular lattice shape, the pattern can be changed greatly, so a decorative impression Can be strongly given. Moreover, since the fine pattern resulting from the difference in this period will arise if the arrangement period of the notch part 4 and the uneven | corrugated pattern 6a differs, the decorative impression will become still stronger.
When these effects are combined, for example, when the decorative plate 6 shown in FIG. 9 is stacked on the transparent substrate 3 shown in FIG. 8, the arrangement period (10 cm) of the notches 4 and the arrangement period of the concavo-convex pattern 6a ( 7 cm), a fine pattern is generated due to the difference in period (see FIG. 10). The position of this fine pattern is increased by slightly rotating the decorative board 6 (see FIGS. 11 and 12). Because it changes, a fantastic and strong decoration is obtained. FIG. 11 shows the decorative plate 6 rotated 10 degrees to the left in FIG. 10, and FIG. 12 also shows 45 degrees rotated to the left.

  As described above, the indirect illumination according to the present invention includes a transparent substrate having a pointed cut portion formed on the front surface side, a light source disposed immediately above the cut portion on the back surface side of the transparent substrate, and transparent It consists of irregular reflection means attached to the back side of the substrate and excluding the area between the light source and the nearest notch, and reflects and refracts the light emitted from the light source on the surface of the transparent substrate including the notch. This is useful because it is thin, difficult to shadow, gentle to the eyes, easy to maintain, and easy to clean.

DESCRIPTION OF SYMBOLS 1 Indirect illumination 2 Light source 2a Condensing means 3 Transparent substrate 3a Front side horizontal surface part 4 Notch part 4a Circumferential surface 5 Diffuse reflection means 6 Decoration board 6a Concave and convex pattern α Inclination angle

Claims (6)

  A transparent substrate having a pointed cut on the front side, a light source disposed immediately above the cut on the back side of the transparent substrate, a light source on the back side of the transparent substrate, and the light source and its nearest It consists of irregular reflection means installed in the area except between the notches, and the peripheral surface of the notch is slanted, and its inclination angle totally reflects the light emitted immediately below it from the light source, and the reflected light The indirect illumination is characterized in that the angle is such that the light is totally reflected on the surface of the transparent substrate and / or the angle is refracted toward the back surface side of the transparent substrate at the peripheral surface of the adjacent cut portion.   The indirect illumination according to claim 1, further comprising condensing means for condensing the light emitted from the light source at the cut portion.   The indirect illumination according to claim 1, wherein the shape of the cut portion is a cusp shape having a polygonal line or a polygonal pyramid shape.   The indirect illumination according to any one of claims 1 to 3, wherein the pointed cut portions are wedge-shaped, and point light sources are arranged immediately above them at predetermined intervals.   A transparent decorative plate in which a plurality of cut portions are arranged in parallel lines, a grid pattern, or a triangular grid pattern, and an uneven pattern is arranged in a parallel line pattern, a grid pattern, or a triangular grid pattern is formed on the surface of the transparent substrate. The indirect illumination according to claim 1, wherein the indirect illumination is provided so as to be rotatable on a side.   The indirect illumination according to claim 5, wherein an arrangement cycle of the concavo-convex pattern is different from an arrangement cycle of the cut portions.

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