JP2001343917A - Display by light - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display which is highly durable and is made relatively inexpensive while its thickness is reduced. SOLUTION: A glass plate 12 is formed to a rectangular flat plate having a prescribed thickness and its flanks 12a are provided with a light source 14 consisting of three light emitting diodes 14a, 14b and 14c. The thickness inside 12b of the glass plate 12 is inscribed with microcracks 15, by which display pictures 13 are formed. The light emitted from the light source 14 enters the thickness inside 12b from the flank 12a of the glass plate 12 and while the light passes the thickness inside 12b, the light falling onto the microcracks 15 is randomly reflected and is released from the surface 12c of the glass plate 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display body for displaying characters, designs, and the like in a light emitting state.

[0002]

2. Description of the Related Art As a display body using this kind of light, FIG.
As shown in FIG. 4, there is a conventional electronic signboard 1 or the like, and a light transmitting plate 3 having a display image 2 such as a character or design printed or etched on the surface is provided on the front surface of the case 4 and provided inside the case 4. By illuminating the back side of the light-transmitting plate 3 with a light source 5 such as a fluorescent lamp, the display image 2 written on the light-transmitting plate 3 is easily recognized.

[0003]

However, in such a conventional light display device, light is emitted from the back side of the light transmitting plate 3, so that the light transmitting plate 3 and the light source 5 are not illuminated.
It is necessary to provide a certain distance between them, and the thickness of the case 4 is inevitably increased, and the device itself becomes larger.

Therefore, it is conceivable to display a desired display image using a liquid crystal plate which can be made thinner as a display body.
In this case, the liquid crystal plate itself is expensive and the life of the liquid crystal is relatively short.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a light-based display which can be made thinner, has excellent durability, and can be kept relatively inexpensive. And

[0006]

Means for Solving the Problems In order to achieve the above object, a light-based display according to the present invention will be described with reference to the accompanying drawings.
c or irregularly-reflected portions of light are engraved on the back surface 12d, and the desired display image 13 is formed by the irregularly-reflected portions.
A light source 14 for irradiating light from the side surface 12a of the transparent plate 12 to the thick inner portion 12b is provided, and the light diffusely reflected at the irregular reflection portion is emitted from the surface 12c of the transparent plate 12.

[0007] In this case, the irregularly-reflected portion is formed by the transparent plate 12.
Micro-cracks 15 formed in the thick inner portion 12b of the substrate.

The irregular reflection portion may be a concave portion 20 formed on the front surface 12c or the rear surface 12d of the transparent plate 12.

In this case, it is preferable that the light source 14 uses a plurality of different color lights and irradiates each color light alone or in a combination selected as appropriate.

It is preferable that the light source 14 be three types of color lights for irradiating three primary colors.

Further, the light source 14 includes the light emitting diode 1
4a, 14b... Can be used.

In this case, the transparent plate 12 is preferably a glass plate.

The transparent plate 12 can be formed by laminating a plurality of transparent plates, each of which is irradiated with a different color light.

Further, the transparent plate 12 may be formed by laminating a plurality of sheets obtained by dividing the desired display image 13 and forming respective divided portions.

Further, it is preferable that the side surface 12a of the transparent plate 12 be a mirror surface except for a portion where the light from the light source 14 is incident.

[0016]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 to 5 show an embodiment of a display body using light according to the present invention, FIG. 1 is a perspective view of the display body, FIG. 2 is a perspective view of a display glass plate which is a main part of the display body, and FIG. FIG. 4 is an enlarged cross-sectional view of a main part of a transparent plate in a portion where an image is formed, FIG.
FIG. 5 is an explanatory diagram showing a path of light passing through the inside of the transparent plate.

That is, the light display device of the present embodiment is shown in FIG.
As shown in FIG.
A glass plate 12 as a transparent plate is attached to the front of
The display image 13 (AK character in this embodiment) formed on the glass plate 12 is raised by illumination. The glass plate 12 is formed in a rectangular flat plate having a predetermined thickness as shown in FIG. 2, and three light emitting diodes 14a, 14b, 14c are provided on one side surface 12a.
Is provided. Further, a changeover switch S for appropriately selecting these light emitting diodes 14a, 14b, and 14c and extinguishing and lighting them is provided.

As shown in FIG. 3, the display image 13 is formed by engraving a microcrack 15 as an irregular reflection portion in the thick inside 12b of the glass plate 12. The micro crack 15 is a crack formed inside, and in this embodiment, an optical laser is used to reduce the light density to a thick inner portion 12b.
Is formed by utilizing an optical break phenomenon when a certain limit is exceeded. Of course, the micro crack 15 is formed along a desired display image 13, and the display image 13 can be expressed as a graphic, a symbol, a pattern, a design, or a photograph in addition to the illustrated characters.

The three light emitting diodes 14a, 14
Different color lights are used for b and 14c, respectively, and in this embodiment, three primary colors are used as shown in FIG. In other words, the three primary colors in this case are those that can produce color light other than the three primary colors by selecting and mixing any two colors or by mixing all three colors. In the embodiment, three colors are used: red shown by oblique lines in the figure, blue shown by meshes in the figure, and yellow shown by satin in the figure. is there. Of course, the three primary colors are red,
Other various combinations are conceivable without being limited to blue and yellow. For example, red, green and
Blue light of three colors can be used. Further, by adjusting the light amounts of the respective color lights to be mixed, other subtle colors can be produced.

In this embodiment, as shown in FIG. 5, the side surface 12a of the glass plate 12 is formed as a mirror surface 17 by attaching an aluminum foil 16 except for a portion P where the color light of the light source 14 is incident. is there.

With the above configuration, in the electric bulletin board 10 of the present embodiment, the light emitted from the light source 14 is incident on the side wall 12a of the glass plate 12 into the thick interior 12b, and the incident light is partially horizontal. Light goes straight through the thick interior 12b,
Most tilted light exceeds the critical angle as shown in FIG.
The light travels to the opposite side surface 12a while being reflected in a zigzag manner between the front surface 12c and the rear surface 12d of the glass plate 12. And
The light that has reached the opposing side surface 12a is reflected because it is a mirror surface 17, and is again reflected on the front surface 12c and the back surface 12c.
The light returns while being reflected between the light source d and the light, and the light is transmitted through the thick interior 12b by repeating this reflection. For this reason, it is possible to prevent the light from being needlessly leaked outward by the mirror surface 17.

As described above, the thick inner portion 12b of the glass plate 12
While the light passes through, the light hitting the micro crack 15 is diffusely reflected in all directions by the micro crack 15, and the light having an inclination angle within the critical angle is transmitted from the front surface 12 c or the back surface 12 d of the glass plate 12. Released. Then, the light emitted from the surface 12c of the glass plate 12, which is the front surface of the electronic bulletin board 10, is visually recognized, whereby the display image 13 can be confirmed. in this case,
The glass plate 12 can be thinned, for example, 1 mm
The thickness can be reduced to about the following. In connection with the above,
Since the size of the microcracks can be extremely small, that is, 100 μm or less, it is possible to display photographs and the like.

Further, it is preferable to use a crystal glass having a high transmittance as a material of the glass plate 12, and to reduce the amount of light absorbed inside the thick inner portion 12b due to such excellent light transmittance. Micro crack 1
5, the amount of light irregularly reflected can be increased, so that the display image 13 can be more clearly expressed.

Here, the light source 14 has three primary colors of red,
Three light emitting diodes 14a, 14b, 14c of blue and yellow
, These light emitting diodes 14a, 14
By appropriately selecting the combination of the color lights irradiated at b and 14c, the selected color lights are mixed when the micro cracks 15 are irregularly reflected, and the display image 1 is mixed.
3 can be expressed in various shades. Therefore, a small number of light emitting diodes 14a, 14b, 14c
Can greatly expand the range of shades.

Therefore, the electronic bulletin board 10 of the present embodiment is
Since the light source 14 has a structure in which light is radiated from the side of the glass plate 12 on which the display image 13 is formed and a light-emitting diode that can be miniaturized is used as the light source 14, the glass plate 1 is practically used.
It is only necessary to provide a thickness of 2 and even when this is protected by the case 11, the overall thickness can be significantly reduced. Further, the glass plate 12 forms the display image 13 by the micro cracks 15 or the like, and the durability thereof is permanent. Thereafter, only the durability of the inexpensive light source 14 has to be considered. Therefore, the display body using light according to the present embodiment is excellent in durability while reducing the thickness, and
In addition, the cost can be kept relatively low.

In this embodiment, the light source 14 is composed of three light emitting diodes 14a, 14a of three primary colors of red, blue, and yellow.
4b and 14c have been disclosed, but the invention is not limited to this, and as shown in FIG. 6, a light emitting diode 14d (not limited to one) of any color light other than the three primary colors is added, and these three primary colors and the arbitrary By using the plurality of light emitting diodes 14a, 14b, 14c, and 14d of various color lights as one set of light sources 14, a plurality of sets of the light sources 14 are used to mix the color lights diffusely reflected by the micro crack 15 more precisely. And the range of mixed colors can be further expanded.

FIG. 7 shows another embodiment, in which the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted. That is, in this embodiment, one glass plate 1
A light source 14 (see FIG. 6) is provided on each of two side surfaces 12a, 12a adjacent to the
Light 5 is directed from a right angle direction. Therefore,
In this embodiment, 2
Since the light can be uniformly applied from the direction, the display image 13 can be clearly expressed over the entirety.

FIGS. 8 and 9 show another embodiment, in which the same components as those in the above embodiment are denoted by the same reference numerals, and a duplicate description will be omitted. That is, in this embodiment, as shown in FIG. 8, three glass plates 12 are laminated to form a transparent plate, and the same display image 13 is formed on the glass plates 12 of each layer, and FIG. As shown in FIG.
2 are provided with light sources 14 (see FIG. 6).

Accordingly, in this embodiment, the display image 13 formed on the glass plate 12 of each layer is the light source 1 of each layer.
By changing the color light of No. 4, the color tone can be changed, and as shown in FIG. 9, the texture can be changed by slightly shifting the position of each display image 13 or changing the shape. And can be displayed three-dimensionally.

By the way, the plurality of glass plates 1
Even when the two layers are stacked, light passing through the respective thick inner portions 12b is not emitted from the front surface 12c or the rear surface 12d except for the irregular reflection by the micro cracks 15, so that the colors do not mix. . Of course, the glass plate 12
Needless to say, the number of stacked layers is not limited to three and may be two or four or more. In addition, the display contents of the three glasses are separately displayed on each layer as an RGB color-separated image, and the images are superimposed. When light of a corresponding color is applied from the side surface of the glass of each layer and three sheets are overlapped, a color image can be displayed.

FIGS. 10 and 11 show another embodiment, in which the same components as those in the above embodiment are denoted by the same reference numerals, and a duplicate description will be omitted. That is, even in this embodiment, the transparent plate is formed by laminating three glass plates 12, and the glass plate 12 of each layer divides the display image 13 into divided portions 13a, 13b, 13c are formed.

Therefore, in this embodiment, by stacking the glass plates 12 of each layer, one display image 1 as a whole is obtained.
3, but each divided part 13a, 13
Since b and 13c can be expressed as different shades, the degree of freedom of expression of the display image 13 is greatly expanded.

In each of the above embodiments, the case where the microcracks 15 are formed in the thick inner portion 12b as the irregular reflection portions for irregularly reflecting light is disclosed. However, the present invention is not limited to this, and as shown in FIG. Surface 12c
Alternatively, the object can be achieved by forming the recessed portion 20 on one of the back surface 12d and using the recessed portion 20 as a diffuse reflection portion. When the recessed portion 20 is formed on the back surface 12d, a part of the light irregularly reflected by the recessed portion 20 passes through the thick inner portion 12b and the front surface 12c.
, The display image 13 can be visually recognized on the front surface. And, as described above, the front surface 12c and the back surface 12d
The recessed portion 20 formed in the above can be formed by an optical laser, but can also be formed by sandblast in which sand collides vigorously.

Further, in each of the above embodiments, the case where the light display body of the present invention is configured as the electric bulletin board 10 is disclosed. However, the present invention is not limited to this and can be applied to various fields. For example, nameplates, various sign boards, signboards,
It can be used as an advertising tower or decorative board.
By using the time display plate 30 shown in FIG. 3, the visibility can be greatly improved. That is, the time display plate 30 in FIG. 3 has a time table 31 and a clock 32 arranged side by side, and the display of the present invention can be used for the time table 31. Furthermore,
In the above embodiments, the light emitting diode 14 is used as the power source 14.
Although a, 14b,... are used, it is needless to say that the present invention is not limited to this, and other light emitters can be used.

[0035]

As described above, in the light display device of the present invention, a desired display image is formed by the irregular reflection of light on the inside of the thickness of the transparent plate or on the front surface or the back surface. By irradiating light from the side surface to the inside of the thickness, the light irregularly reflected at the irregular reflection portion is emitted from the surface of the transparent plate to display the display image, so that the durability is improved while reducing the thickness, In addition, the cost can be kept relatively low.

The light source for irradiating the light may use a plurality of different color lights, and irradiate each color light alone or in an appropriately selected combination, so that a wider range of color expression can be achieved with less color light.

In particular, the light source for irradiating light is three kinds of color lights for irradiating three primary colors, respectively, so that a large number of colors can be expressed only by the three kinds of color lights.

Further, by using a light emitting diode as the light source, it is possible to further reduce the size of the light source.

Further, by using a glass plate as the transparent plate, it is possible to more clearly express a display image with excellent light transmittance.

Further, by laminating a plurality of the above transparent plates and irradiating them with different color lights, the mixing of the color lights can be performed more densely and the width of the mixed colors can be expanded.

Furthermore, the transparent plate can be expressed as different shades at each divided portion by laminating a plurality of sheets obtained by dividing the desired display image and forming respective divided portions. Therefore, the degree of freedom of the display image can be greatly expanded.

Further, the transparent plate is made to have a mirror surface except for the side where the light of the light source is incident, so that the light incident inside the thick wall is reflected by the side surface which becomes the mirror surface and is re-exposed. Since the light returns to the inside of the thickness, it is possible to prevent light from leaking to the outside.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric bulletin board showing one embodiment of a display according to the present invention.

FIG. 2 is a perspective view of a transparent plate showing one embodiment of a display according to the present invention.

FIG. 3 is an enlarged cross-sectional view of a main part of a transparent plate at a portion where a display image is formed, showing an embodiment of the display body according to the present invention.

FIG. 4 is a side view of an embodiment of a display according to the present invention, showing a light source arrangement state.

FIG. 5 is an explanatory diagram showing a path of light passing through a transparent plate, showing one embodiment of a display according to the present invention.

FIG. 6 is a side view of an arrangement state of a light source showing another embodiment of the display body according to the present invention.

FIG. 7 is an explanatory diagram showing a relationship between a transparent plate and a light source in another embodiment of the display according to the present invention.

FIG. 8 is a perspective view of a display body according to another embodiment of the present invention, in which a plurality of transparent plates are separated.

FIG. 9 is an explanatory view showing a relationship between a plurality of transparent plates and a light source in another embodiment of the display according to the present invention.

FIG. 10 is a perspective view of another embodiment of the display according to the present invention, in which a plurality of transparent plates are separated.

FIG. 11 is an explanatory view showing a relationship between a plurality of transparent plates and a light source in another embodiment of the display according to the present invention.

FIG. 12 is an enlarged cross-sectional view of a main part of a transparent plate in a portion where a display image is formed, showing another embodiment of the display body according to the present invention.

FIG. 13 is a perspective view of a time display plate showing another embodiment of the display according to the present invention.

And FIG. 14 is a perspective view of a conventional display body, which is a vertical section of an electronic bulletin board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric sign board (display body) 12 Glass plate (transparent plate) 12a Side surface 12b Thick inside 12c Front surface 12d Back surface 13 Display image 13a, 13b, 13c Dividing portion 14 Light source 15 Micro crack (diffuse reflection portion) 17 Mirror surface 20 Concave portion ( Diffuse reflection part) 30 Time display board (display body)

Claims (10)

[Claims] An irregularly reflecting portion of light is engraved on a thick inner portion (12b), a front surface (12c) or a rear surface (12d) of a transparent plate (12).
While a desired display image 13 is formed by the irregular reflection portion, a light source 14 for irradiating light from the side surface 12a of the transparent plate 12 to the thick inner portion 12b is provided, and the light irregularly reflected by the irregular reflection portion is applied to the surface 12c of the transparent plate 12. A light-emitting display body characterized by being emitted from a light source. 2. The display body according to claim 1, wherein the irregular reflection portion is a micro-crack 15 formed in a thick inner portion 12b of the transparent plate 12. 3. The irregular reflection portion is provided on the surface 1 of the transparent plate 12.
2. The display body according to claim 1, wherein the display body is a recessed portion 20 formed on the rear surface 2 c or the rear surface 12 d. 4. The light according to claim 1, wherein the light source uses a plurality of different color lights and irradiates the respective color lights individually or in an appropriately selected combination. Display body by. 5. The light source according to claim 4, wherein the light sources are three kinds of color lights for emitting three primary colors.
2. A display body using light according to 1. 6. The light source 14 includes a light emitting diode 14
a, 14b... are used.
A display body using light according to any one of the above items. 7. The display according to claim 1, wherein the transparent plate is a glass plate. 8. The light-based display device according to claim 1, wherein the transparent plate 12 is formed by laminating a plurality of sheets to which different color lights are irradiated. 9. The desired display image 1 is provided on the transparent plate 12.
8. A light-based display according to claim 1, wherein a plurality of sheets each of which is divided into three and each of which is formed is laminated. 10. The transparent plate 12 has a side surface 12a.
10. The display body according to claim 1, wherein a surface of the display body is a mirror surface except for a portion where the light of the light source 14 is incident.