JPH01163902A - Lighting apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a lighting device, particularly a lighting device that uses a light-concentrating resin material containing a special fluorescent material and indirect light to provide ceiling lighting, wall lighting, etc. The purpose of the lighting is to improve indoor illumination and lighting efficiency by effectively using indirect light without relying on direct light or light distribution that uses light reflection. The present invention also includes a light-condensing illumination material formed by molding a resin having a fluorescence wavelength λx into a predetermined shape, and a light source.

[Industrial application field]

The present invention relates to a lighting device, and more specifically, to a lighting device that provides ceiling lighting, wall lighting, etc. using a light-concentrating resin material containing a special fluorescent material and indirect light.

C. Conventional technology] FIG. 6 is a diagram illustrating a lighting device according to a conventional example.

Figure (a) shows a perspective view of the louver ceiling lighting.

In the figure, reference numeral 1 denotes a ceiling lighting material, which is made of a base material such as aluminum, stainless steel, wood, polystyrene, acrylic, etc., and has a surface finish applied thereto. 2 is a light source;
These include fluorescent lights and globe incandescent lights. 3 is an indoor room such as a conference room or a classroom where ceiling lighting is provided. Note that 4 is the ceiling surface.

Furthermore, the ceiling lighting is separated into direct lighting and is a lighting method that allows most of the light from the light source 2 to directly reach the work surface, and is suitable for lighting large rooms such as conference rooms and classrooms. In addition, by providing the ceiling lighting material 1, dark areas near the ceiling are eliminated, the entire room becomes uniformly bright, and the gloomy feeling is eliminated. However, in order to increase the illuminance of the illuminated surface, the number of light sources 2 installed must be increased.

FIG. 6B is a cross-sectional view illustrating the relationship between the light source 2 and the ceiling lighting material 1. In FIG. 6, the direct light 5 emitted from the light source 2 directly reaches the illuminated surface 8, and similarly The light 6a is reflected by a reflective material provided on the inner wall surface of the ceiling illumination material 1, becomes reflected light 7, and reaches the illuminated surface 8.

As a result, the indirect light 6b that does not enter the ceiling lighting material 1 is lost between the light source 2 and the ceiling lighting material 1 without effectively reaching the illuminated surface.

[Problem that the invention seeks to solve]

However, according to the conventional example, if a method of installing a small number of light sources without using ceiling lighting material 1 is adopted for lighting a large room such as a conference room or classroom that requires uniform illuminance, the influence of the ceiling and walls will be reduced. As a result, the illuminance of the illuminated surface becomes uneven, making the area near the ceiling dark and making the room feel gloomy. Therefore, a louver ceiling lighting method is adopted in which the number of light sources 2 is increased and the ceiling lighting material 1 is combined.

However, as shown in FIG. 6(b), the direct light 5 emitted from the light source 2 and the indirect light 6a enter the ceiling lighting material 1, and the reflected light 7 reflected by the lighting material hits the illuminated surface. reach. Further, the remaining indirect light 6b between the light source 2 and the ceiling lighting material 1 is lost without reaching the illuminated surface.

As a result, in order to obtain the same illuminance on the illuminated surface 8, the number of light sources 2 installed must be increased, and the efficiency decreases due to illumination loss caused by the indirect light 6b.

The present invention was created in view of the problems of the conventional example, and effectively utilizes indirect light to illuminate the illuminated surface without relying on direct light or light distribution that uses light reflection. The objective is to provide a lighting device that makes it possible to improve illuminance and lighting efficiency.

[Means for solving problems]

The lighting device of the present invention includes a fluorescent material f10, as shown in FIG. 1 for its principle diagram and in FIGS.
In addition, the present invention is characterized by comprising a light-condensing illumination material 11 made of a resin having a fluorescence wavelength λx molded into a certain shape, and a light source 12, thereby achieving the above object.

[For production]

According to the present invention, when direct light from a light source, the sun, etc., its dispersed light, or indoor light such as a fluorescent lamp enters a light-concentrating lighting material such as a fluorescent plastic material containing an organic phosphor, the inside is absorbed by the fluorescent material, and isotropically emitted and scattered within the light-condensing illumination material.

As a result, most of the incident light propagates through the condensing illumination material by total reflection, reaches the end face, and emits fluorescence to the outside.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a structural diagram of the lighting device according to the first embodiment of the present invention, and FIG. 2(a) shows a perspective view of the light-condensing lighting material.

In the figure, 11 is a light-condensing lighting material, which includes an acrylic material,
This fluorescent plastic material is made by injection-molding a heat-resistant polycarbonate material and a mixture thereof into a lattice shape by containing a fluorescent substance 10 therein.

Note that the fluorescent substance IO is, for example, a perylene-based organic fluorescent material (dye) having the chemical formula shown in FIG.

Moreover, by making it into a lattice shape, it can be used as interior materials such as indoor building materials and lighting materials.

FIG. 2B shows a cross-sectional view of the light-condensing lighting material 11 used for louver ceiling lighting.

In the figure, 15 is a ceiling surface, and 16 is indirect lighting such as a fluorescent lamp or a globe lamp. Note that the indirect lighting 16 and the condensing lighting material 11 may be installed separately, or the indirect lighting 16 may be installed separately.
Any method may be used, such as including it in the light-condensing illumination material 11 and installing it. Further, the indirect illumination 16 may be direct light from the sun or its dispersed light, without using dedicated illumination such as a fluorescent lamp. In addition, compared to the conventional louver ceiling lighting, the number of light sources installed is sufficient to obtain about 80% of the illuminance of the same illuminated surface in the louver ceiling lighting according to the embodiment of the present invention, making it an energy-saving type.

In this way, direct light from the light source 16, the sun, etc., its dispersed light, indoor light such as a fluorescent lamp, etc. is transmitted to the light-concentrating illumination material 11, such as a fluorescent plastic material containing a fluorescent substance (organic fluorescent substance) 10. When the light enters the light, it is absorbed by the fluorescent substance 10 inside the light, and the light is emitted isotropically into the light-condensing illumination material 11 and is scattered. As a result, most of the incident light propagates through the condensing illumination material 11 by total reflection, reaches the end face, and is emitted as fluorescence 14 to the outside. Note that the fluorescent light 14 is uniformly emitted over a radiation area (light distribution area), that is, a grid-like area.

FIG. 3 shows a structural diagram of a lighting device according to a second embodiment of the present invention.

In the figure, the difference from the first embodiment is that in the second embodiment, two or more light-condensing illumination materials 11a and llb are stacked to form a multilayer structure 17. That is, the light-condensing illumination material 11a with the fluorescence wavelength λ1 and the light-condensing illumination material 11b with the fluorescence wavelength λ2
It has a double structure. Note that 10a is a fluorescent substance (organic fluorescent material) contained in the light-condensing illumination material 11a,
Similarly, 10b is a fluorescent substance contained in the light-condensing illumination material 11b. Moreover, between the fluorescence wavelengths λ1 and λ2, λ1>λ
There is a relationship of 2, and the light-condensing illumination material 11b with the fluorescence wavelength λ2 is installed closer to the illuminated surface. This makes it possible to mix fluorescent colors. For example, a condensing illumination material 11a having a fluorescence wavelength λ that emits red light with a long wavelength, and a condensing illumination material 11b having a fluorescence wavelength λ2 that emits green light with a short wavelength.
When light enters the condensing illumination material 11a, it becomes yellow fluorescent light 14a and radiates to the outside.

Further, when a triple structure is formed by stacking light-condensing illumination materials (not shown) having a fluorescence wavelength λ3 that emits blue light with a short wavelength, the incident light is emitted as white (transparent color) fluorescence. Note that the light-collecting illumination materials 11a and 11 with fluorescence wavelengths λ1, λ2, and λ
If b and llc are arranged in reverse, the amount of transmitted light will decrease and it will become dark.

In this way, when the direct light or dispersed light from the indirect illumination 16 enters the light-collecting illumination material 11a, which has a fluorescent wavelength λ and is made of a fluorescent plastic material containing a fluorescent substance (organic phosphor) 10a, The light is absorbed by the fluorescent substance 10a, and isotropically emitted and scattered into the light-condensing illumination material 11a. Further, the scattered light enters the condensing illumination material 11b with the fluorescence wavelength λ2, is similarly absorbed by the fluorescent material 10b inside, and is isotropically emitted into the condensing illumination material 11b, causing scattering. do.

As a result, most of the incident light is totally reflected on the light collecting material 11a.
, llb, reaches the end face, and emits the fluorescent light 14a mixed outside.

FIG. 4 is a structural diagram of a lighting device according to a third embodiment of the present invention, and shows an example applied to an indoor partition partition.

In the figure, llc is a light-condensing illumination material made by combining fluorescent plastic materials containing fluorescent substances in a lattice shape. Note that 18 is a leg portion (stand) that holds the light-condensing illumination material 11c. Further, reference numeral 19 denotes indirect lighting that serves as a light source for the condensing illumination material 11c, and its mounting position is
A method may also be used in which the lighting device c and the indirect lighting 19 are included instead of being separated from each other.

14 is the fluorescence emitted from the condensing lighting material 11c, and since the entire partition partition emits light, a wider light distribution can be obtained compared to the local light distribution of fluorescent lamps, incandescent lamps, etc., and the entire room can be illuminated. A bright, soft-touch light source.

In this way, the direct light from the indirect lighting 19 and the dispersed light are fluorescent! When it enters the condensing illumination material 11c, such as a fluorescent plastic material containing (organic phosphor), it is absorbed by the fluorescent substance inside the condensing illumination material, and the light is emitted isotropically and scattered within the condensing illumination material. . As a result, most of the incident light propagates at high speed in the condensing illumination material 11c by total reflection, reaches the end face, and is emitted to the outside as fluorescence 14.

FIG. 5 is an explanatory diagram of the chemical formula of the organic phosphor according to the embodiment of the present invention, and shows a typical example of a perylene-based organic fluorescent material. In addition, perylene-based organic phosphors are contained in acrylic materials, heat-resistant carbonate materials, and mixtures thereof as fluorescent substances 10, 10a, and IQb, and each fluorescent wavelength (λ5, λ
2, λ, ...) condensing illumination materials 11, lla, llb
, llc.

In this way, indirect lighting 1 as in the 1.3 embodiment
When direct light, dispersed light, sunlight, etc. from 6 and 19 enters a light-concentrating illumination material 11, llc, such as a fluorescent plastic material containing a fluorescent substance (for example, perylene organic phosphor) 10, the fluorescent substance inside 10, and the light condensing illumination material 11, lie.

Light is emitted isotropically and scattered inside. This allows most of the incident light to propagate at high speed through the condensing illumination material 11.11c by total reflection, reach the end face, and emit fluorescence 14 to the outside.

Further, according to the second embodiment of the present invention, the fluorescence wavelength λ1,
Two or more light-collecting illumination materials 11a and 11b with different λ2 are arranged in order from the one closest to the illuminated surface to the light-collecting illumination material flb with the shorter fluorescence wavelength.
By overlapping around 1 of , lla and injecting light, fluorescent L4a is prepared without using a conventional color light source.
It becomes possible to radiate.

〔Effect of the invention〕

As explained above, according to the present invention, indirect light can be used more effectively by total reflection of the light incident on the light-condensing lighting material containing the fluorescent substance.

For this reason, compared to, for example, conventional louver ceiling lighting that uses reflection, the present invention can reduce the number of light sources installed, improve the illuminance of the same illuminated surface, and expand the uniform light distribution area. becomes.

Further, according to the present invention, by overlapping light-condensing lighting materials with different fluorescent wavelengths, it is possible to create a fluorescent color tone base.
It becomes possible to omit the conventional color light source equipment and the like.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram of a lighting device according to the present invention, FIG. 2 is a structural diagram of a lighting device according to a first embodiment of the present invention, and FIG. 3 is a diagram of a lighting device according to a second embodiment of the present invention. Fig. 4 is a structural diagram of a lighting device according to a third embodiment of the present invention; Fig. 5 is an explanatory diagram of the chemical formula of a luminescent material according to an embodiment of the present invention; Fig. 6 is a conventional example. FIG. 2 is a diagram illustrating a lighting device according to the invention. (Explanation of symbols) 1...Ceiling lighting material, 2.12...Light source 3...Indoor, 4.15...Ceiling surface, 5...Direct light, 6a, 6b...Indirect light , 7... Reflected light, 8... Illuminated surface, 10... Fluorescent material, 11... Light condensing illumination material, 13... Incident light, 14... Fluorescence, 16.19... - Indirect lighting, 17...Multiple structure, 18... Legs (stand). Fig. 1 Fig. 2 cf (Nl) Fig. 4 Ar Ar R1 wa group (run 6L holder, 1 te e train, θ month device 8 Tomada 1 Fig. 6

Claims (5)

[Claims] (1) Contains a fluorescent substance (10) and has a fluorescence wavelength (λx
) A light-condensing lighting material (1
1) and a light source (12). (2) The lighting device according to claim 1, wherein the certain shape is a grid shape. (3) The lighting device according to claim 1, wherein the light source (12) is indirect lighting (16, 19). (4) A patent claim characterized in that two or more light-condensing illumination materials (11a, 11b) molded into fixed shapes with different fluorescence wavelengths (λx) are stacked to form a multilayer structure (17). The lighting device described in scope 1. (5) The lighting device according to claim 1, wherein the fluorescent substance (10) is a perylene-based organic fluorescent material.