JP4710893B2 - Lighting equipment - Google Patents

Description

  The present invention relates to an improvement of a lighting device.

  Currently, an illumination device using an LED lamp as a light source has been proposed. Such a lighting device has been used more frequently in recent years, taking advantage of the advantages of LED lamps such as light weight, small size, low power consumption, and low heat generation. In connection with this, the improvement of the design property is calculated | required. For example, Patent Document 1 discloses a configuration in which an electrical circuit is formed by a transparent electrode on a light-transmitting plate-like substrate, thereby improving the light utilization rate and improving the design.

Japanese Patent Laid-Open No. 11-26813

Compared to conventional lighting devices that use light bulbs or fluorescent lamps as light sources, lighting devices that use LED lamps as a light source have a short history, and there is room for development in the construction of lighting devices to take advantage of the advantages of LED lamps. is there. The design is not yet refined.
Accordingly, an object of the present invention is to propose a lighting device with higher designability in a lighting device using an LED lamp as a light source. Another object of the present invention is to propose a configuration of a lighting device that can take advantage of the LED lamp.

To achieve the above object, the present invention has the following configuration. That is,
A first transparent plate that emits light from the first surface and has a V-shaped groove formed on the second surface;
An LED lamp disposed on the second surface,
The LED lamp wiring is disposed in the V-shaped groove.

  In the illuminating device of the present invention, the wiring of the LED lamp is disposed in a V-shaped groove formed on the surface (second surface) opposite to the light emitting surface (first surface) of the first transparent plate. The The light introduced into the first transparent plate is incident on the wall surface of the V-shaped groove at an angle that is totally reflected by the light emission surface (first surface). As a result, the wiring is not visually recognized from the light emission surface which is the design surface of the lighting device. On the other hand, since the LED lamp disposed on the second surface is visible, the LED lamp appears to be independent from the viewer (ie, it appears to shine without wiring). Therefore, the lighting device of the present invention has a unique design.

(LED lamp)
In the illumination device of the present invention, an LED lamp is used as a light source. An LED lamp is a light source that consumes less power and generates a larger amount of heat and has a longer life than a light source such as a bulb, and is suitable for lighting continuously for a long time. Further, since it is small, it is suitable for downsizing, thinning, and high-density mounting. In addition, the light source itself is miniaturized, which increases design freedom and contributes to design.
On the other hand, since the LED lamp is resistant to vibration and impact, there is an advantage that a highly reliable device can be configured. The type of the LED lamp to be used is not particularly limited, and an LED lamp such as a bullet type or a surface mount type can be adopted.

  The emission color of the LED lamp is not particularly limited, and a blue LED lamp, a blue-green LED lamp, a green LED lamp, a red LED lamp, and the like can be employed depending on the application. An LED lamp that emits light in the ultraviolet region can also be used. Two or more types of LED lamps may be used. For example, if three types of red LED lamp, green LED lamp, and blue LED lamp are used, an illuminating device that generates white light can be configured. Moreover, according to such an illuminating device, it is also possible to generate light of a desired color by controlling the light emission state and the light emission amount of each LED lamp. The number of LED lamps used is not particularly limited, and a plurality of LED lamps may be used. Of course, the plurality of LED lamps may be of the same type, and different types of LED lamps may be included.

(First transparent plate)
The illumination device of the present invention includes a first transparent plate that is light transmissive. The first transparent plate is provided with an LED lamp, and has a second surface on which light from the LED lamp is incident and a first surface on which the light of the LED lamp incident from the second surface is emitted to the outside. . A V-shaped groove in which the wiring of the LED lamp is disposed is formed on the second surface. The material of the first transparent plate is not particularly limited as long as it has optical transparency, and examples thereof include acrylic resin, silicon resin, and glass. Among these, it is preferable to use an acrylic resin. This is because the acrylic resin has high light transmittance, is easy to mold and has excellent strength, and is easy to handle. The shape of the first transparent plate is usually a flat plate shape, but a part thereof may be curved. Further, the thickness of the first transparent plate may be constant over the whole, or a part of the thickness may be different from the others.

In the first transparent plate, the LED lamp is preferably embedded in the first transparent plate. This is because the light incident efficiency into the first transparent plate is increased, the amount of light emitted from the first surface is increased, and an illumination device with a large amount of light can be provided.
The first surface serving as the light emitting portion is not limited to a smooth surface, and may be a light diffusing surface subjected to a light diffusing process. A light emission part can be made into a design surface.
The V-shaped groove formed on the second surface has a wall surface inclined in a V shape in a cross section perpendicular to the direction in which the LED lamp wiring extends. The inclination angle of the wall surface of the V-shaped groove can be determined in consideration of the material of the first transparent plate. For example, when the material of the first transparent plate is acrylic resin, the angle formed between the wall surface of the V-shaped groove and the light emitting part is 60 ° or more so that total reflection is likely to occur when observed from the light emitting part side. can do. The wall surface of the V-shaped groove is preferably a smooth surface. This is because the light incident from the wall surface does not diffuse and is easily totally reflected by the light emission surface (first surface). The size (depth) of the V-shaped groove can be appropriately determined depending on the thickness of the LED lamp wiring and the number of wirings to be arranged. The wall surface of the V-shaped groove may be formed uniformly along the wiring of the LED lamp, or the inclination angle and depth of some wall surfaces may be different from other wall surfaces. The LED lamp is preferably embedded in the first transparent plate. This is because the light incident efficiency of the LED lamp in the light incident portion is improved.

  The first transparent plate may be colored and transparent as well as colorless and transparent. In addition, a light diffusing agent may be included in the first transparent plate to actively diffuse light within the first transparent plate. A color conversion layer may be formed on the light emitting portion of the first transparent plate. Thereby, light of a color different from the original color of the LED lamp can be emitted. For example, the color conversion layer can be formed of a layer containing a fluorescent material that is excited by light from an LED lamp. The color conversion layer may be formed on the entire area of the light emitting portion of the first transparent plate, or may be formed on a part of the area.

  In one aspect of the present invention, the LED lamp is embedded in the second surface of the first transparent plate, and the second transparent plate is bonded to the second surface and laminated. The material of the second transparent plate can be the same material as the first transparent plate. The shape of the second transparent plate is assumed to be such that at least the surface facing the first transparent plate is along the first transparent plate. This is to prevent a space from being formed between both transparent plates and to prevent irregular reflection of light caused by the space.

The schematic diagram of the longitudinal cross-sectional view of the illuminating device 1 of the said aspect is shown in FIG. As shown in FIG. 1, of the light emitted from the LED lamp 2, the light that travels directly to the light emitting surface 11 (first surface) side of the first transparent plate 10 is refracted by the light emitting surface 11 and externally. To be released. The observer who sees this light will visually recognize the 1st virtual image 2a of the LED lamp 2, as shown in FIG. That is, the LED lamp 2 is visually recognized as being located slightly rearward. On the other hand, in the light of the LED lamp 2, the light traveling to the bonding surface (second surface) 12 side of the first transparent plate 10 and the second transparent plate 20 is the light emitting surface 11 side on the bonding surface 12. And is refracted by the light emitting surface 11 and emitted to the outside. An observer who sees this light visually recognizes the virtual image 2b of the LED lamp 2 as shown in FIG. Since the second virtual image 2b is obtained by the light reflected by the bonding surface 12 of the first transparent plate 10, the second virtual image 2b is positioned in the second transparent plate 20 behind the first virtual image 2a. Will be. In this way, by observing the first virtual image 2a and the second virtual image 2b, the viewer is given an illusion and surprisingness as if there are two LED lamps, giving a unique depth feeling. . Thereby, it becomes an illuminating device with high designability. The second transparent plate may be colored and transparent as well as colorless and transparent, like the first transparent plate.
Examples of the present invention will be described below.

FIG. 2 shows a perspective view of a lighting apparatus 100 that is an embodiment of the present invention. It is suspended from the indoor ceiling by three wires 102a-c attached to three hooks 101a-c, respectively. The lighting device 1 includes a first lighting device 50 and a second lighting device 60.
First, the first lighting device 50 will be described. An exploded perspective view of the first lighting device 50 is shown in FIG. As shown in FIG. 3, the first lighting device 50 includes a first transparent plate 51 and a second transparent plate 52, and an upper surface (first surface) 51 b of the first transparent plate 51 and a lower surface 52 b of the second transparent plate 52. Are pasted together. The first transparent plate 51 and the second transparent plate 52 are both made of an acrylic resin, and have a substantially square plate shape with a side of about 300 mm in plan view, and a substantially square opening portion with a side of about 150 mm at the center. 51a and 52a are provided. The thickness of the first transparent plate 51 is about 20 mm, and the thickness of the second transparent plate 52 is about 10 mm. The first transparent plate 51 includes eight LED lamps 53 by in-mold formation, and these are arranged at equal intervals on a radius of about 140 mm around the center of the first transparent plate 51 in plan view, It arrange | positions so that the light emission direction may become the downward direction (the direction opposite to the 2nd transparent plate 52). That is, the portion of the first transparent plate 51 that contacts the LED lamp 53 is a light incident portion, and the surface of the first transparent plate 51 opposite to the bonding surface 51b with the second transparent plate 52 is the light emitting portion (first emission plate). Surface) 51c. The light emitting part 51c is a smooth surface.

  On the other hand, the eight LED lamps 53 are connected in series, and the lead wire connecting the eight LED lamps 53 in series is the first transparent plate 51 along a radius of about 140 mm where the LED lamps 53 are arranged. Is disposed in a V-shaped groove 55 formed on the upper surface (second surface). Similarly, eight LED lamps 54 are included, and these are arranged at equal intervals on a circle with a radius of about 120 mm centered on the center of the first transparent plate 51 in plan view. Eight LED lamps 54 are connected in series, and the lead wires connecting the eight LED lamps 54 in series are V-shaped formed along a radius of about 120 mm where the LED lamps 54 are arranged. It is disposed in the groove 56. The LED lamps 53 and 54 are both bullet-type white LED lamps.

  FIG. 4 is a cross-sectional view taken along the line AA in a state where the first transparent plate 51 and the second transparent plate 52 are bonded together in FIG. As shown in FIG. 4, the grooves 55 and 56 are formed on the upper surface of the first transparent plate 51 by being cut into a V shape. The first transparent plate 51 and the second transparent plate 52 are bonded to each other, and the grooves 55 and 56 form a triangular gap having a tip angle of 60 °, and lead wires 57 and 58 are disposed therein. The wall surfaces of the grooves 55 and 56 are smooth surfaces. Further, the grooves 55 and 56 are formed uniformly over the entire area.

  The groove 55 and the groove 56 are communicated with each other by a communication part 59 formed by being cut into a V shape on the upper surface of the first transparent plate 51. FIG. 5 is a cross-sectional view taken along line B-B in a state where the first transparent plate 51 and the second transparent plate 52 are bonded together in FIG. 3. As shown in FIG. 5, the second transparent plate 52 is provided with a through hole 59 a at a position corresponding to the communication portion 59. A hook 101a is attached to the upper edge of the through hole 59a. The lead wires 57 and 58 are taken out to the upper surface side of the second transparent plate 52 through the communication portion 59 and the through hole 59a. The lead wires 57 and 58 taken out are arranged along the wire a and are electrically connected to a power source (not shown) provided on the indoor ceiling side.

Next, the second lighting device 60 will be described. A longitudinal sectional view of the second lighting device 60 is shown in FIG. The second lighting device 60 includes a case 61, a light source unit 62, and filters 63a to 63g. The case 61 has a hollow quadrangular prism shape, the shape portion is closed, and the lower portion is opened. The light source unit 62 is disposed at the upper end inside the case 61. Sixteen LED lamps 64 are arranged in a dot matrix on the lower surface side (interior floor side) of the light source unit 62 and are electrically connected to a power source (not shown) provided on the indoor ceiling side. The LED lamp 64 is a bullet-type white LED lamp. The filters 63 a to 63 g are stacked on the lower surface side of the light source unit 62. A perspective view of the filter 63a is shown in FIG. The filter 63a is an acrylic flat plate with a side of 100 mm, and a plurality of concave strips 65a parallel to one side are formed on the surface. The filters 63b to 63g have the same shape as that of the filter 63a, and are provided with concave strips 65b to 65g parallel to one side. A top view of the state in which the filters 63a to 63g are stacked is shown in FIG. As shown in FIG. 8, the filters 63a to 63g are stacked so that the centers 65a to 65g are positioned on the same axis while being rotated by about 60 ° about the centers 65a to 65g of the filters 63a to 63g. ing. The filters 63a to 63g are locked in the case 61 by locking claws 61a formed on the inner surface of the case 61.
In the second lighting device 60, a protrusion 61b is formed on the lower edge of the case 61. The second lighting device 60 is attached to the first lighting device 50 by engaging the protrusion 61 b with a groove (not shown) formed in the wall surface of the opening 52 a of the second transparent plate 52.

  In the lighting device 100 as described above, the lead wires 57 and 58 are disposed in a triangular gap formed by the V-shaped grooves 55 and 56 and having a tip angle of 60 °. Therefore, the light incident from the wall surfaces of the grooves 55 and 56 is totally reflected by the light emitting portion 51c. As a result, when the first illumination device 50 is observed from the light emitting portion 51c side (that is, the indoor side), the lead wire 57, 58 is not visually recognized. Furthermore, since the lead wires 57 and 58 are taken out to the outside through the communication portion 59 and the through hole 59a and connected to the power source along the wire 102a, the lead wires 57 and 58 are hardly visible from the outside. As a result, the LED lamps 53 and 54 are observed as if they are lit in a state where they are not connected to the lead wires, which gives the observer unexpectedness and high design.

  FIG. 9 is a schematic diagram for explaining a state in which the LED lamps 53 and 54 are observed from the indoor side. The LED lamps 53 and 54 are included in the first transparent plate 51, and the second transparent plate 52 is bonded to the upper surface 51 b of the first transparent plate 51. Of the light from the LED lamps 53 and 54, the light emitted directly from the LED lamp is refracted by the light emitting surface 51c. This light is visible to the observer. As a result, when viewed from the observer, the LED lamp forms an image at a position (slightly behind the LED lamps 53 and 54) where the light after refraction is extended in the opposite direction and linearly, and the first LED lamps 53 and 54 The virtual images 53a and 54a are visually recognized. On the other hand, of the light from the LED lamps 53 and 54, the light traveling to the upper surface (bonding surface) 51b is reflected by the bonding surface 51b toward the light emitting surface 51c, refracted by the light emitting surface 51c, and emitted to the outside. Is done. The observer sees this light and forms an image at a position (inside the second transparent plate 52) in which the light after refraction is extended in the opposite direction and linearly, and the second virtual images of the LED lamps 53 and 54 are formed. 53b and 54b are visually recognized. In this way, by observing two types of virtual images, the observer is given the illusion and surprise that the LED lamps 53 and 54 exist in two places, and in addition, a unique depth feeling is given. High design characteristics. In addition, since the LED lamps 53 and 54 are smaller than general light bulbs and fluorescent lamps, most of the portions of the first illumination device 50 that are visible from the indoor side are transparent (the first transparent plate 51 and the first transparent plate 51 and 54). A second transparent plate 52). Therefore, even if it is suspended from the indoor ceiling, there is no feeling of pressure.

The illumination mode of the illumination device 100 will be described below. First, in the 1st lighting device 50, the light of LED lamps 53 and 54 injects into the 1st transparent plate 51, and is discharge | released indoors from the light emission part 51c. Since the first transparent plate 51 is colorless and transparent and the light emitting portion 51c is a smooth surface, the light emitted from the light emitting portion 51c is not actively diffused and becomes highly directional light. ing. Therefore, the light of the first lighting device 50 can be suitably used for the purpose of illuminating a specific area with high brightness (so-called spot lighting or the like).
By the way, since the LED lamps 53 and 54 are included in the first transparent plate 51 by in-mold formation, the light from the LED lamps 53 and 54 enters the first transparent plate 51 with high efficiency. Thereby, the utilization factor of light improves.

On the other hand, in the second illumination device 60, the light from the LED lamp 64 sequentially passes through the stacked filters 63a to 63g and is emitted into the room from the opening 51a (52a). Concave portions 65a to 65g are formed on the respective surfaces of the filters 63a to 63g, and the filters 63a to 63g are stacked by being shifted by about 60 ° (that is, spirally). When light passes through these, the light is emitted into the room while being reflected in various directions by the concave portions 65a to 65g. As a result, the emitted light becomes light with low directivity. Therefore, the light of the second illumination device 60 can be suitably used for the purpose of illuminating a relatively wide range with low luminance (so-called atmosphere illumination, mood illumination, etc.).
As described above, the lighting device 100 can be an easy-to-use lighting device by using two completely different lighting modes according to the purpose. Further, by using both illumination modes at the same time, both spot illumination and atmosphere illumination can be performed simultaneously.

  In this embodiment, the colorless and transparent filters 63a to 63g are used, but colored and transparent filters may be used. Moreover, although filter 63a-g by which the concave strip part 65a-g was formed in the surface was used, it is not limited to this, Various light-diffusion reflection layers can be used. In the second illumination device 60, the LED lamp 64 is used as a light source. However, the present invention is not limited to this, and a known light emitter such as a light bulb or a fluorescent lamp can be used as the light source of the second illumination device 60.

  The present invention can be used for various illuminations.

The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.
The contents of papers, published patent gazettes, patent gazettes, and the like specified in this specification are incorporated by reference in their entirety.

FIG. 1 is a schematic diagram of a longitudinal sectional view of a lighting device 1 of one embodiment of the present invention. FIG. 2 is a perspective view of the lighting device 100 according to the embodiment of the present invention. FIG. 3 is an exploded perspective view of the first lighting device 50. FIG. 4 is a cross-sectional view taken along line AA in FIG. 3 in a state where the first transparent plate 51 and the second transparent plate 52 are bonded together. FIG. 5 is a cross-sectional view taken along the line BB in a state where the first transparent plate 51 and the second transparent plate 52 are bonded to each other in FIG. FIG. 6 is a longitudinal sectional view of the second lighting device 60. FIG. 7 is a perspective view of the filter 63a. FIG. 8 is a top view of the state in which the filters 63a to 63g are stacked. FIG. 9 is a schematic diagram for explaining a state in which the LED lamps 53 and 54 are observed from the indoor side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100 Illuminating device 2, 53, 54, 64 LED lamp 2a, 53a, 54a 1st virtual image 2b, 53b, 54b 2nd virtual image 10, 51 1st transparent plate 11, 51c Light emission surface 12 51b Bonding surface 20, 52 Second transparent plate 50 First illumination device 55, 56 Groove 57, 58 Lead wire 59 Connecting portion 59a Opening portion 60 Second illumination device 61 Case 62 Light source unit 63a-g Filter 65a-g Concave portion

Claims (4)

A first transparent plate that emits light from the first surface and has a V-shaped groove formed on the second surface;
An LED lamp disposed on the second surface,
The LED lamp wiring is disposed in the V-shaped groove, and the lighting device.   The lighting device according to claim 1, wherein the LED lamp is embedded in the second surface of the first transparent plate.   The lighting device according to claim 2, wherein a second transparent plate is laminated on the second surface of the first transparent plate.   The lighting device according to claim 1, wherein a plurality of the LED lamps are provided, and the plurality of LED lamps are arranged in a circle.

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