JPS61103105A - Illuminating appliance - Google Patents

Abstract

PURPOSE:To make an illuminating appliance which is thin and is advantageous when installed as an illuminating appliance, etc. for a display on a wall by using the end face of a light transmittable plate as a light incident part and sticking a light scatterable material to the front and rear of the light transmittable plate. CONSTITUTION:Various materials such as glass and plastic having high transparency are usable for the light transmittable plate 10 and above all, the material having good light resistance is more preferable. The film 11 contg. the light scatterable material is stuck on the rear of the plate 10 over approximately the entire surface thereof and a display layer 12 on which the characters, etc. to be displayed are drawn is formed on the front. Reflecting layers 13 are formed on both side end faces. The light made incident to the plate 10 through the end face from a light source part 2 progresses in the plate 10 by repeating the total reflection while the light is partly scattered by the film 11 contg. the light scatterable material. The illuminating light is therefore obtd. from the entire surface of the point where the film 11 is stuck and the display of the light and pattern by the layer 12 with the light is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a lighting device for providing planar illumination such as surface illumination, and three-dimensional illumination composed of curved surfaces.

"Lighting" as used in Honkawa 11m includes both irradiating light onto an object and emitting light so that the luminous body itself becomes a visual object, and lighting equipment is compatible with these uses. When distinguishing between the two, the former is referred to as an illuminator, and the latter is referred to as a light emitter.

In the case of advertisement lighting equipment, illumination was achieved by irradiating a panel with characters, patterns, etc. on it with a fluorescent light from behind the panel. Therefore, this type of lighting equipment requires depth for installing the fluorescent lamp, and further depth is required because the fluorescent lamp needs to be installed away from the panel to prevent uneven illumination. As a result, when embedding it in a wall, a deep recess must be provided, which requires a large installation space and labor, and is disadvantageous in terms of wall strength. In addition, neon tube lights have been used as light emitters for signboards and store displays, but it is time-consuming to produce letters and patterns using neon tube lights, and it is difficult to produce them after production. There was a problem in that it was difficult to change characters, etc.

The IJ issue that Ming is trying to decide.

The present invention solves these problems of the prior art, is thin, is advantageous when installed on a wall as a display lighting device, etc., and is easy to manufacture when used as a light emitting body for signboards or displays. The purpose is to provide a lighting device in which letters and patterns can be easily changed.

Means for Solving Illumination Points The object of the present invention is to make at least a part of the end surface of a light-transmitting plate a light incident part, and to provide at least a part of the front and back surfaces of the light-transmitting plate from the opposing surface. This is achieved by a lighting device characterized in that a light-scattering substance is attached so as to emit scattered light.

The above-mentioned object of the present invention also includes a light-transmitting plate and a light transmission iron extending along at least one end surface of the light-transmitting plate and capable of transmitting light incident on one end to the other end, A light diffusing portion is formed on the outer circumferential surface on the opposite side to the light-transmitting plate, and a light diffusing portion is formed by linearly adhering high-refractive-index fine powder in the axial direction of the rod, and at least a portion of the front and back surfaces of the light-transmitting plate is provided with a light diffusing portion. This can also be achieved by a lighting device characterized in that a light-scattering substance is attached so as to emit scattered light from opposing surfaces.

In each of the illumination plates, a coloring transparent film that selectively transmits light of a specific wavelength can be provided on the surface opposite to the surface to which the light-scattering substance is attached.

The transparent film for coloring includes a dielectric multilayer film in which high refractive index layers and low refractive index layers are arranged alternately, and the thickness of each of the high refractive index layers and low refractive index layers is as follows: Substantially Nt=λ/4+nλ One: [λ is the wavelength of light that is complementary to the colored light to be obtained, n is 0 or a positive integer, N is the refractive index of each layer] The light-transmitting film can be configured to selectively transmit light of a specific wavelength.

The light-transmitting film for coloring is provided with gold ASG> that can selectively transmit light of a specific wavelength.
It can be provided in an appropriate combination with a hl film.

Effects and Effects of the Invention According to the present invention, the light incident on the translucent plate from at least a part of the end surface travels through the translucent plate while being repeatedly totally reflected, and the light enters the translucent root surface and the back surface of the translucent plate. The light that reaches the light scattering substance attached to the surface is scattered, and the light that forms an angle smaller than the critical angle with respect to the surface opposite to the surface to which the substance is attached is emitted from the surface.

Therefore, if the light scattering substance is applied in a planar manner,
One-sided illumination can be obtained, and characters or patterns can be drawn on the opposing surfaces to be used as station name display lighting or advertising lighting. In this way, the light source can be installed facing the end surface of the translucent plate, that is, on the side of the lighting fixture, and irradiation from the rear is not required. It is extremely advantageous because it is thin enough to correspond to the plate and its protective cover, and the recess for embedding can be made shallow or eliminated when installed on a wall. Alternatively, if the light-scattering substance is colored as necessary and attached to the back surface of the translucent plate in the manner of drawing letters or patterns, light can be emitted from the surface in a shape and color corresponding to these letters or patterns. It will be done. Therefore, it is easy to manufacture when used as a light emitting body for signboards or displays, and when changing the drawn characters or patterns, it is extremely easy to change the light-scattering substance by simply re-attaching it.

Furthermore, when the present invention is provided with a translucent plate and a light transmission rod as described above, in addition to the above-mentioned effects, a point light source is used to emit light almost uniformly from a wide surface of the translucent plate. It also has the effect of being able to release. That is, as shown in FIGS. 6 and 7, a high refractive index differential material is linearly attached to the outer peripheral surface of the light transmission rod (a) in the rod axis direction to form a light diffusing portion (b). Therefore, the light incident from one end of the rod by the point light source travels through the rod while repeating total reflection, and the light that reaches the light diffusion section is diffused and reaches the opposite end of the light diffusion section. The length of the light diffusing section is emitted from the outer peripheral surface of the rod in a directionally manner by a lens action based on the curved surface. Since it is formed on the outer peripheral surface of the rod, the linear light emitted in this way enters from the end face of the light-transmitting plate, and is scattered by the light-scattering substance while traveling through the light-transmitting plate. In this way, the light emitted from the point light source is once spread linearly and then made to enter the translucent plate, so when the light from the point light source is made to enter directly, This results in a uniform release.

Furthermore, the lighting device of the present invention can emit colored light without or in addition to coloring the light-scattering substance by being provided with the coloring translucent film as described above. This makes it possible to provide lighting with excellent decorative and attention-grabbing properties.

In particular, the coloring transparent film is made of a dielectric material having a length of 1I as described above.
When it is equipped with lil, due to the following action,
By providing more decorative and attention-grabbing illumination, the light of a specific wavelength based on the layer thickness is reflected and the transmittance is lowered, and as a result, the transmitted light has a complementary color relationship with the light of the wavelength. It has the property of giving color. Therefore, by varying the thickness and number of layers constituting the dielectric multilayer film depending on the location on the transparent plate, different colors and tones can be obtained. Further, even if the thickness of the layer is the same, the optical path length when passing through the layer differs depending on the degree of inclination accompanying the scattering of the emitted light, and accordingly, the light takes on a different color. Therefore, when a lighting device configured in this manner is used as a light emitter, different colors will be perceived depending on the viewing angle. By changing the color and tone depending on the location or viewing angle in this way, the illumination becomes more decorative and alert. The light reflected by the dielectric multilayer film further travels inside the transparent root, so by appropriately emitting this light by adjusting the layer thickness, efficient and good illumination can be achieved with less loss. It becomes possible.

The light-transmitting film for coloring can also be formed from gold 1. This takes advantage of the fact that a metal thin film transmits short wavelength light; for example, gold transmits green light and copper transmits red light. Furthermore, by combining a film made of a substance that absorbs short wavelength light such as selenium, cadmium sulfide, and silicon oxide, the color tone can be changed, and in addition, the gold IEII can be protected, such as by preventing oxidation.

The transparent film for coloring obtained in this way does not have pleochroism like the IL1 multi-WJ film, and the illumination efficiency decreases due to absorption. It can be obtained easily and inexpensively by sputtering or the like.

Furthermore, a transparent film for coloring was added to the dielectric material with a length of 1 m and the metal NW.
It is also possible to form a combination of i4 and provide more diverse colored illumination.

Example Hereinafter, practical examples of the present invention will be described with reference to the accompanying drawings.

The lighting fixtures shown in Figures 1 and 2 are flat plate-shaped,
It is widely used for displaying station names and advertising. This lighting device has a main body (1) having a rectangular translucent plate (10).
, a light source section (2) extending along both long sides of the translucent plate (10), and a power supply section (3) connected to the light source section (2).
, and a protective cover (4) that covers the entire surface of the translucent plate (10). As the light-transmitting plate (10), various highly transparent materials such as glass and plastic can be used, and materials with good light resistance are particularly desirable. On the back side of the translucent plate (10) is a layer (11) containing a light-scattering substance.
) is adhered over almost the entire surface, a display layer (12) on which characters to be displayed, etc. are drawn is formed on the surface, and reflective I! (13) is formed.

The light-scattering substance may be anything as long as it can scatter light, such as paint, metal, paper, cloth, transparent or translucent substance powder, and the like. Of course, in addition to applying it as a paint, it can be applied in various ways, such as adhering a sheet.

The display layer (12) can be formed of colored paint, ink, film, etc., which are used for display in ordinary lighting equipment, and may also be formed of a dielectric multilayer film or a metal film as described above.
N! It can also be formed using a transparent film for coloring. The reflective layer (13) is provided to prevent light from leaking from the side end faces, and may have a reflective mirror surface or may be formed as a paint film with good reflectivity. The light source section (2) includes a light source (20) and a holder (21). Light [(20) includes linear light sources such as fluorescent lamps and mercury lamps, a large number of ordinary point light sources arranged in a linear manner,
It is possible to use a device using an optical transmission device, which will be described later. The holder (21) has a reflective mirror surface on its inner surface, and not only holds and protects the light source (20), but also plays the role of focusing the light toward the end surface of the translucent plate (10). . The protective cover (4) is transparent at least in the front part of the translucent plate (10).

If dust or foreign matter adheres to the translucent plate (10), it may cause light leakage, so the protective cover (4) should be protected against light 1! (
20) It is desirable to have appropriate dustproof properties while taking into consideration heat dissipation.

With such a configuration, the light that enters the light-transmitting plate (10) from the light source part (2) via the end face is partially scattered by the II (11) containing a light-scattering substance, and the light enters the light-transmitting plate (10) through the end face. (1
0) through repeated total reflections. Of the scattered light, the transparent plate (10) and the light source part (2)
This corresponds to the depth of the protective cover (4) that covers the panel, and is extremely thin compared to conventional irradiation from the rear of the panel. Incidentally, the light-transmitting plate (10) can of course be used as an irradiator by surface illumination without providing a display layer, and by taking advantage of its thinness, it can also be advantageously used for illuminating a liquid crystal television. In addition, light scattering Il! (11), translucent plate (10)
Instead of forming it on the entire surface, it can be formed in the shape of letters or figures instead of the display FJ (12). In this case, the letters or figures will appear to emit light in a dark field. Furthermore, if the film (11) is colored, characters or figures can be colored.

The lighting devices shown in FIGS. 3 to 5 are suitable for use as light emitters for signs and displays in stores. This lighting fixture has a main body (10) having a rectangular translucent plate (10).
1), a light source section (2), a power supply section (3), and a protective cover (4) extending along one end surface, which is the long side of the translucent plate (10).
It is equipped with

The light-transmitting plate (10) is the same as the previous example, but a film containing a light-scattering substance is shown on the back side of the light-transmitting plate (10).
A coloring translucent film (15) made of a dielectric multilayer film is adhered to the surface at a position corresponding to a part of the display film (14). As the light-scattering substance, those mentioned above can be widely used, and the display film (1
For example 4), a photograph can be obtained by applying a light-sensitive emulsion to a light-transmitting plate and printing it. In addition, a reflective layer (13) is provided between the ends of the translucent plate (10) other than the end face facing the light source section (2).
is provided. The light source part (2) is a translucent plate (10)
a light transmission rod (22) extending substantially the entire length between the ends;
A point light source (23) facing one end surface of the rod (22), a reflection all (24>) provided on the other end surface of the rod (22),
and a holder (25) that covers these. As the rod (22), it is preferable to use a rod with as high transparency as possible (refractive index: 1.46 to 1.46), a quartz glass rod (refractive index: 1.46), a rod with optical strength (refractive index: 1.5 to 1.7), silicone resin rondo (refractive index:
1.41) etc. can be used advantageously. The rod (22) is solid and has a circular cross section. The diameter is determined depending on the transmission source and the length of the rod, but it is desirable from the viewpoint of lighting efficiency that it does not greatly exceed the thickness of the translucent plate wall.

The outer peripheral surface of the optical transmission rod (22) is provided with a rod (
22) Diffusion stripes (
220) is deposited.

The diffusion stripes (220) are made of a light-resistant transparent fine powder with a higher refractive index than the rods (22), such as barium sulfate (refractive index: 1.51).
), magnesia (refractive index: 1.8), titania (refractive index: 2.6), etc. can be advantageously used. ZnS is added to the fine powder in order to give any color to the reflected and diffused light if necessary.
(blue-green) or EuQOs (red), Tb
20s (green) mixed by thermal diffusion (for example)
magnesia, titania).

Examples of means for attaching the fine powder to the rod (22) include attaching the fine powder using a light-resistant transparent binder such as silicone resin, and a silicone resin molding material in which the fine powder is dispersed. It is possible to adopt methods such as adhering using a silicone resin-based transparent adhesive.

In any case, by using silicone resin, light resistance, heat resistance, and transparency can be obtained, and due to its moderate elasticity, good adhesion is achieved despite the difference in thermal expansion coefficient with the rod (22,). is obtained.

If the thickness of the diffusion stripes (220) is too thin, there is a risk of transmission loss, so it is advantageous to form the diffusion stripes (220) to a thickness of at least Q, i1 m or more. Diffusion stripes (220
The width of > is appropriately determined depending on the amount of incident light, the diameter of the rod (22), the length of the illumination line, etc. Generally speaking, as the width of the diffusion stripes (220) increases, the amount of light emitted per unit length increases, but on the other hand, the length of the light emission line that maintains the light amount becomes shorter, and conversely, when it becomes smaller, the amount of light is maintained. Although the length of the light emitting line increases, the amount of light emitted per unit length decreases. Therefore, its width depends on the purpose of the lighting equipment.
It may be determined as appropriate depending on the purpose. Diffusion stripes (220
) is constant, the brightness of the illumination light decreases exponentially with the distance from the incident end, so in order to compensate for this decrease, the width of the diffusion stripe (220°) is A means for gradually increasing the width from the incident end side may be adopted. In addition, there is a reflection 1l (
24), the transmitted light that has reached the tip is reflected toward the incident end, and such a reduction can be corrected to some extent.

As mentioned above, the width of the diffusion stripes (220) varies depending on the length of the rod, the diameter, the incident light m, and the use and purpose of the lighting device, but it is usually 0.5 to 3.0 square meters, and advantageously is 1.5 ~
It is about 2.5 weight ■.

Although various types of light sources can be used as the light source (23), it is preferable to use a source close to a point light source, since the rod diameter can be made small, such as a tungsten lamp, a halogen lamp, or a xenon lamp. In order to increase the degree of freedom in coloring using the dielectric length Ii film, it is desirable to use a light source that includes a wide range of wavelength components, and for sodium lamps and mercury lamps, the range of wavelength components limits the coloring. Transparent film for coloring (1
The thickness of each layer of the dielectric length It film constituting 5) is determined by the above formula. In this formula, n is usually O or 1,
The number of layers is one pair of high refractive index layer and low refractive index layer,
It is desirable to have 5 to 6 layers. If it is less than this, the wavelength band to be transmitted will be narrow and the color tone will change gradually as the viewing angle changes, and if it is more than that, the wavelength band to be transmitted will be wide and it will become close to white, making it impossible to obtain an appropriate color tone, and it will become octavalent. . The material used for the high refractive index layer has a refractive index of 2 to 2.6.
Examples of such materials include titania, ceria, zinc oxide, zirconia, and tin oxide.

The material used for the low refractive index layer has a refractive index of 1.3 to 1.5.
Examples include aluminum fluoride, magnesium fluoride, lithium fluoride, sodium fluoride, and silica. Translucency.

These layers can be formed on the surface of the plate (10) by commonly used methods such as vapor deposition, sputtering, and photo-CVD.

With this configuration, the light emitted from the point light 1 (23) is converted into directional linear light by the light transmission rod (22) and is made to enter from the end face of the transparent plate (10). The light travels through the transparent plate (10) while repeating total reflection, is scattered by the display Iti (14) containing a light-scattering substance, and exits from the surface, becoming illumination light. moreover,
The light emitted through the transparent coloring film (15) made of a dielectric multilayer film is colored according to the layer thickness, and the color and tone change depending on the viewing angle. Is this lighting equipment also pictured?)□
As you can see, it is thin. In addition, the display film (
If 14) is drawn using paint or the like, a display part for characters or the like that emits light can be obtained, and a lighting fixture as a light emitter for a signboard or display can be easily manufactured, and the display part can be easily changed. Furthermore, the colored light that passes through the transparent film for coloring is rich in decorative and attention-calling properties, and changes in color and tone with viewing angle further increase these effects. In the illustrated example, the parts of the translucent plate (10) other than the display film (14) are transparent, so it appears that characters etc. are emitting light from the transparent plate, but the rear part of the translucent plate (10) An opaque plate can also be installed as a base part. The opaque plate must be placed so that it does not come into contact with the translucent plate (10) to prevent unnecessary light emission. As a transparent film for coloring, instead of a dielectric multilayer film,
Alternatively, metal 31m can also be used in conjunction with this.

The above is an example of a planar transparent plate, but it is also possible to make it into various curved shapes, such as a conical shape or a cylindrical shape as shown in FIGS. 8 and 9. It can be made into The light is incident on the end face of the conical light-transmitting plate (10) as shown in Figure 8, or on the end face formed by cutting out the side surface of the cylindrical light-transmitting plate (10) as shown in Figure 9. This can be done by disposing a light source section such as an optical transmission rod (22). The lighting fixture thus obtained is highly decorative and can be used as an ornament, as well as being made watertight or used in combination with a watertight container as a vase, aquarium, etc.

[Brief explanation of drawings]

The figures relate to the present invention; FIG. 1 is a front view of one embodiment, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a partially cutaway front view of another embodiment. Figure 4 is Figure 3C-
5 is a sectional view taken along line C-C in FIG. 3, FIG. 6 is an oblique view showing the state of light emission from the optical transmission rod (22), and FIG. 7 is the state of light emission. FIGS. 8 and 9 are perspective views of still other different embodiments. (1)...Body part (2)...Light source part (3)...Power supply part (4)...Protective cover (10)...Translucent plate (11)...Light scattering Membrane containing sexual substances (12)...
Display layer (13)...Reflection layer (14)...Display film (15)...Transparent film for coloring (2o)...Light source (21) -...Holder (22)... Light transmission rod (23)...Point light source (24) -...Reflector (25)...Holder (220)...Diffusion stripes (and above) Figure 1 Figure 2 Figure 6

Claims (8)

[Claims] (1) At least a part of the end surface of the light-transmitting plate is used as a light entrance part, and at least a part of the front and back surfaces of the light-transmitting plate is provided with a light-scattering material so as to emit scattered light from the opposing surface. A lighting fixture characterized in that it is attached with. (2) At least a part of the end face of the translucent plate is used as a light entrance part, and at least part of the front and back surfaces of the translucent plate is provided with a light-scattering material so as to emit scattered light from the opposing surfaces. A lighting device characterized in that the opposing surfaces are provided with a coloring translucent film that selectively transmits light of a specific wavelength. (3) The light-transmitting film for coloring includes a dielectric multilayer film in which high refractive index layers and low refractive index layers are arranged alternately, and the thickness of each of the high refractive index layers and low refractive index layers is is determined to be substantially Nt=λ/4+nλ [λ is the wavelength of light that is complementary to the colored light to be obtained, n is 0 or a positive integer, and N is the refractive index of each layer]. 3. The lighting device according to claim 2, wherein the light-transmitting film selectively transmits light of a specific wavelength. (4) The lighting device according to claim 2 or 3, wherein the coloring transparent film includes a metal thin film that can selectively transmit light of a specific wavelength. . (5) comprising a light-transmitting plate and a light transmission rod extending along at least one end surface of the light-transmitting plate and capable of transmitting light incident on one end to the other end, the light-transmitting plate in the rod; A light diffusing section is formed on the outer circumferential surface on the opposite side, and a light diffusing section is formed by linearly adhering high refractive index fine powder in the axial direction of the rod. A lighting device characterized in that a light-scattering substance is attached so that it can emit light. (6) comprising a light-transmitting plate and a light transmission rod extending along at least one end surface of the light-transmitting plate and capable of transmitting light incident on one end to the other end, the light-transmitting plate in the rod; A light diffusing section is formed on the outer circumferential surface on the opposite side, and a light diffusing section is formed by linearly adhering high refractive index fine powder in the axial direction of the rod. A lighting device characterized in that a light-scattering substance is attached so as to emit light, and the opposing surfaces are provided with a coloring transparent film that selectively transmits light of a specific wavelength. (7) The light-transmitting film for coloring includes a dielectric multilayer film in which high refractive index layers and low refractive index layers are arranged alternately, and the thickness of each of the high refractive index layers and low refractive index layers is is determined to be substantially Nt=λ/4+nλ [λ is the wavelength of light that is complementary to the colored light to be obtained, n is 0 or a positive integer, and N is the refractive index of each layer]. 7. The lighting device according to claim 6, wherein the light-transmitting film selectively transmits light of a specific wavelength. (8) The lighting device according to claim 6 or 7, wherein the coloring transparent film includes a metal thin film that can selectively transmit light of a specific wavelength. .