JP2016145482A - Sign - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sign that enables even a color of a diagram or a character to be visually recognized without use of a luminous material and the like in a dark environment.SOLUTION: A sign includes: a base; a luminous layer which is placed on the base; and a non-luminous graphic layer which is placed to represent a character or a diagram on at least a part on the luminous layer and which has a large number of pores reaching the luminous layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sign that is installed indoors and outdoors and has good visibility by emitting light even in a dark environment.

  Conventionally, various techniques for facilitating visual recognition of the display contents of a sign in a dark environment such as outdoors at night or unmanned facilities are known. For example, the display content can be made visible by illuminating the display using illumination means. In addition, a technique is also widely known that makes it possible to illuminate a display by using a phosphorescent material or to make the display contents visible by using a phosphorescent material without using an illumination unit that requires a power source. Patent Document 1 discloses a technique for making a symbol, a character, or the like emit light with a phosphorescent material that mainly develops a color from yellow to green and making it visible.

JP 2007-108473 A

  As described above, the technique disclosed in Patent Document 1 emits light from a symbol, character, figure, etc. and can recognize the symbol, character, figure, etc., but cannot provide information regarding the background of the symbol, character, figure, etc. It was. On the other hand, some signs make sense including the background of symbols, characters, figures, and the like. In particular, among signs installed outdoors, not only characters but also their display colors have important meanings, and many of them are required by law or custom to be associated with specific meanings.

  For example, a sign that includes a red display is a sign that has a meaning including some prohibited matter (such as a regulatory sign), and a sign that includes a yellow display is often a sign (such as a warning sign) that calls for attention. . Many of the signs that contain blue indications have the meaning of information transmission (indicating signs, guidance signs, etc.), and those that contain green indications have a sense of safety and security while relaxing the viewer (evacuation guidance signs) , Highway signs, etc.).

  Such a sign can be recognized by a person who sees it in the desired color, including symbols, letters, figures, and background, at daytime or in the nighttime under illumination. Among them, areas that emit light by phosphorescent materials are recognized as such, but areas that do not emit light, such as non-light-transmitting films without using phosphorescent materials, even if the film itself has color. There was a problem that it was visually recognized as black and the original color of the sign was impaired.

  In order to solve the above problems, the present invention provides a base, a light-emitting layer disposed on the base, and at least a part of the light-emitting layer to represent characters or / and figures, and the light-emitting layer We propose a non-light-emitting graphic layer with a number of fine holes reaching up to a sign.

  According to the present invention mainly configured as described above, it is possible to provide a sign that can visually recognize the color of the figure or character even in a dark environment indoors or outdoors.

The figure which shows an example of sectional drawing of the label | marker of Example 1 A figure showing an example of a conventional sign The figure which shows an example of the label | marker of a present Example which shows the same content as each label | marker shown in FIG. The perspective view which shows an example of the base of the label | marker of Example 1 The figure which shows another example of sectional drawing of the label | marker of Example 1 The figure which shows another example of sectional drawing of the label | marker of Example 1 The figure which shows another example of sectional drawing of the label | marker of Example 1 The figure which shows another example of sectional drawing of the label | marker of Example 1 An enlarged perspective view showing an example of a sign of an example Sectional drawing in the AA surface of the label | marker of Example 1 demonstrated using FIG. The conceptual diagram for demonstrating the manufacturing method of a circular shaped control sign among the signs shown using FIG. 11 is an enlarged view of a part of FIG. The figure which shows an example of sectional drawing of the label | marker of Example 2 The figure which shows another example of sectional drawing of the label | marker of Example 2 The conceptual diagram which shows an example which emits light with the label | marker of Example 2

  Embodiments of the present invention will be described below with reference to the drawings. The relationship between the embodiments and the claims is as follows. First, Example 1 mainly corresponds to claims 1, 3, 4, 5, 6, 7, 8, 9, 10 and the like. The second embodiment mainly corresponds to claim 2 and the like. In addition, this invention is not limited to these Examples at all, and can be implemented in various modes without departing from the gist thereof.

<< Example 1 >>

<Overview>
In the sign of this embodiment, a non-light emitting graphic layer representing a character or a figure that becomes a part of the sign is arranged at least on a light emitting layer arranged on the base, and the graphic layer reaches the light emitting layer. It has a feature of having many fine holes.

<Configuration>
FIG. 1 is a diagram showing an example of a cross-sectional view of the sign of this embodiment. The “label” 0100 of this embodiment includes a “base” 0101, a “light emitting layer” 0102, and a “graphic layer” 0103, and the graphic layer has a number of fine “holes” 0110.

  The size and shape of the label of this embodiment are not particularly limited. Therefore, for example, it can be realized with signs of various sizes and shapes from a large one such as a road sign or a sign to a small one such as a guide sign attached to a wall near the foot.

  The “base” 0101 is used to increase the mechanical strength of the sign, and is composed of various metals, strong plastic, hard rubber and the like. In the case of a sign installed outdoors, it needs to have good weather resistance. The thickness of the base and the like are appropriately designed according to the size of the sign and the intended use. In addition, the base does not need to be made of a single material, and may be composed of a plurality of materials. In addition, the base has a light emitting function rather than simply stacking materials, and the subsequent steps in the manufacturing process can be advanced efficiently. It may have a dish shape. As the material, aluminum, stainless steel or the like is often used, and in the case of a bowl shape, it may be formed by extrusion molding, digging molding, or the like.

  FIGS. 4A, 4B, and 4C are perspective views showing only the base portion in the case where the base of the sign of this embodiment is configured in a bowl shape. FIG. 4A is a circular shape, FIG. 4B is a square shape, and FIG. 4C is a triangular mark base. The characteristic point is that the bottom surface (0401a, 0401b, 0401c) of the base is flat and the wall surface (0402a, 0402b, 0402c) is erected around the bottom surface. This wall surface serves to protect the light emitting layer formed on the base and the side end face of the graphic layer disposed on the light emitting layer. Therefore, the height of the wall surface is preferably larger than the value obtained by adding the thickness of the light emitting layer and the thickness of the graphic layer.

  The process of forming a light emitting layer on this bowl-shaped base can be devised. For example, the phosphorescent material is stored in a state of being dissolved in a solvent, but the phosphorescent layer can be formed by pouring this into a bowl and drying it. Such a process is advantageous because a light emitting layer having a flat surface can be obtained.

  It is also possible to provide a reflective layer on the bottom surface of the bowl-shaped base before pouring the light emitting layer material in this way. The reflective layer is usually made of a white material, typically titanium oxide. In addition, for example, a white pigment such as silica mixed in a solution such as an acrylic resin or a polycarbonate resin may be used and formed by coating the base light emitting layer in the form of a film. Of these, titanium oxide is particularly excellent in reflectivity and is most suitable as a reflector. When titanium oxide is also dissolved in a solvent and supplied, it can be formed by pouring in the same manner as the phosphorescent material of the light emitting layer. This is because a reflective layer having a flat surface can be obtained.

    Here, FIG. 8 is a cross-sectional view of the sign of the present invention when a reflective layer is provided on the upper surface side of the base. The “signature” 0800 includes a bowl-shaped “base” 0801, a “reflective layer” 0820, a “light emitting layer” 0801, and a “graphic layer” 0802. The graphic layer has a number of fine “holes” 0810. Have.

In addition, in order to comprise a light emitting layer when a bowl-shaped base is used, it is also possible to construct the light emitting layer by a method of simply fitting a phosphorescent material that has been solidified in advance with a mold having the same shape. . In this way, there is an advantage that the product can be delivered in a short delivery time by producing a large amount of solidified phosphorescent material, procuring the base at the stage when the order is generated, and quickly assembling it.

  FIG. 5 is a cross-sectional view when a light emitting layer and a graphic layer are formed on such a bowl-shaped base. A “marker” 0500 in the figure includes a bowl-shaped “base” 0501, a “light emitting layer”, and a “graphic layer” 0503, and the graphic layer has many fine “holes” 0510. The approximate thickness is such that the thickness of the light emitting layer is about 0.3 to 4.2 mm, and further about 0.8 to 3.5 mm. The thickness of the base may be about 0.8 millimeters to 1 millimeter, but may be variously designed depending on the installation location and shape as described above.

    FIG. 6 shows an example of a sign that uses a bowl-shaped base as in FIG. 5, but the figure shows an example where the light emitting layer is not a phosphorescent material but a light source such as an LED. The “label” 0600 in the figure includes a bowl-shaped “base” 0601, a “light emitting layer” 0602 made of a fluorescent material, and a “graphic layer” 0603, and the graphic layer has many fine “holes” 0610. Have. Under the light emitting layer, a “light source” 0605 such as an LED light is disposed so as to be embedded in a “transparent material” 0604 such as a transparent plate (the transparent material will be described in detail later).

  In this case, the light emitting layer functions only after power is supplied to the LED. However, in order to cope with power outages, the power source used for this sign is always stored as an emergency in a secondary storage battery or the like. It is preferable. The power source may be a normal power line or a system that stores electricity in the daytime by solar power generation. A primary storage battery may be used as long as it is used only in an emergency. In addition, although the example which provides "the luminous layer or fluorescent layer" 0602 was shown in the figure, this is also omissible.

  Incidentally, the light emitted from the light source does not need to be visible light, and it is of course possible to adopt a configuration that emits invisible light (ultraviolet light). In particular, by adopting a configuration that emits ultraviolet light, it is possible to efficiently irradiate light to a light emitting layer made of a fluorescent material.

  FIG. 7 is a cross-sectional view of a sign using a bowl-shaped base. The basic configuration is the same as that of FIG. 6, and the “label” 0700 includes a bowl-shaped “base” 0701, a “light emitting layer” 0702 made of a fluorescent material, and a “graphic layer” 0703. The graphics layer has a number of fine “holes” 0710. A transparent “transparent layer” 0705 is disposed under the light emitting layer, and a “light source” 0704 such as an LED light is further disposed under the base.

  The difference is that it has a transparent layer 0705 formed using glass or the like as compared with that of FIG. In the sign of FIG. 6, the LED is embedded in “transparent material” 0604, but in the sign of FIG. 7, the upper space 0706 of the LED is a space where nothing is arranged. Instead, a transparent plate such as glass is used. Arranged. By doing in this way, even if the light incident on the light emitting layer 0702 made of a phosphorescent material or a fluorescent material is reflected by the upper surface and returned, it is re-reflected by the transparent plate, and the light energy can be effectively utilized. is there.

  The “light emitting layer” is a layer that emits light. Typically, it is a phosphorescent material layer, but is not limited thereto, and may be an LED layer that emits light by electricity as described above. The light emitting layer may be designed to be exposed when observed from the surface side of the sign, or may be entirely covered with a graphic layer described later. This basically depends on the design of the sign. However, when exposed by observing from the front side, it is necessary to adjust the color so that the sign is visually recognized as the target color under sunlight or under illumination. For example, if the target color is light green, a material that can be visually recognized as light green under sunlight is selected.

  If the target color is not the original color of the phosphorescent material, a phosphorescent material whose color is adjusted by mixing dyes, pigments, etc. is selected. The thickness of the light emitting layer is preferably about 0.3 to 4.2 mm. Furthermore, about 0.8 mm to 3.5 mm is preferable. The type of the phosphorescent material is not particularly limited, but for example, acrylic, vinyl, ethoxy, urethane, silicone or other resins can be used. The light emitting layer may be formed using a paint, or may be formed by a method of attaching a film or the like. When installing the sign indoors, suitable light emission can be continuously achieved even with acrylic resin, etc., but when installing outdoors, a configuration using a highly weather-resistant urethane resin is applied Is desirable.

  In particular, by using a silicone resin, it is possible to realize high weather resistance from ultraviolet rays that are continuously irradiated indoors and outdoors.

  About the luminescent color of a light emitting layer, it can be considered to be almost yellowish green or turquoise, and any luminescent color may be employ | adopted. However, the emission color of the light emitting layer is preferably arranged in a color close to that of the graphic layer described later. Here, it is conceivable as an example that colors close to RGB values are close to each other, but in general, yellow-green is selected when the graphic layer is arranged in a warm color, and blue-green is selected when a graphic color is arranged in a cold color. It is preferable. By adopting this configuration, the color arrangement of the graphic layer can be clearly recognized when light from the light emitting layer is emitted to the outside through a hole in the graphic layer described later.

  The “graphic layer” is arranged on the light emitting layer in order to form symbols, characters, graphics, etc. excluding the background of the sign. The color of the graphic layer also needs to be the target color of the sign under sunlight. For example, green, red, yellow, etc. This is because, as described above, the present invention aims to allow the sign to be visually recognized in the originally aimed color even in sunlight or in an environment without night illumination. However, the present invention provides a solution particularly when the graphic layer is non-light-emitting and light-impermeable. If an originally opaque film is placed on the light-emitting layer and attempts to express symbols, characters, figures, etc., it will be visible in the original color of the film under sunlight, In an environment where there is no light, the background phosphor layer emits light, but the film area is visually recognized as black, and the problem that the sign is not visually recognized in the originally intended color is solved. Therefore, in the sign of this example, when the graphic layer is made of a material of a color that cannot be expressed by the light-emitting layer such as a phosphorescent material or a fluorescent material, the sign is particularly excellent in that the sign can be visually recognized with the originally intended color. Give birth.

    In the present invention, as a means therefor, many small holes are provided in the light-impermeable film, and the holes are penetrated so as to reach the surface of the light emitting layer as a lower layer. The aim is that light from the light-emitting layer incident on the hole from that region is irregularly reflected on the cross-section of the opaque film, revealing the color of the film, and recognizing the original color of the film visible under sunlight It becomes possible. For the same reason as described for the light emitting layer, it is preferable to use a silicone resin for the graphic layer.

  The diameter of the hole is suitably about 0.1 mm to 5 mm. This is because if the diameter of the hole is too small, the light from the light emitting layer attenuates before reaching the surface of the graphic layer, and the color of the graphic layer cannot be sufficiently delivered to the surface. Further, if it exceeds 4 millimeters, the color of the light emitting layer is changed, and the original color of the graphic layer is rather faded.

  Further, the hole shape is preferably a hollow cylindrical dot hole shape. The cylindrical shape makes it easy to diffusely reflect light on the inner side surface of the hole, and as a result, the color of the graphic layer can be visually recognized more clearly in the emission color of the light emitted to the outside.

  The thickness of the graphic layer is suitably about 0.01 to 1 millimeter. This must be optimized in relation to the hole diameter, but if it is too thin, i.e. less than 0.01 mm, the light from the light-emitting layer will be less diffusely reflected in the cross section of the graphic layer. The color of the graphic layer cannot be sufficiently transmitted to the surface of the sign. On the other hand, if the thickness is more than 1 millimeter, the light from the light emitting layer attenuates before reaching the surface of the sign, and the color of the graphic layer cannot be transmitted to the surface.

  According to a number of repeated trials and errors, it is considered that the thickness of the graphic layer is suitably in the range of 0.02 millimeters to 0.3 millimeters when the hole diameter is 1 millimeter to 2.5 millimeters.

In addition, the graphic layer may arrange | position the film in which the hole was previously provided using an adhesive etc. on the light emitting layer, or arrange | position the film in which the hole is not provided on the light emitting layer, and after that, in a light emitting layer You may make a hole to reach.

Further, the diameters of the holes provided in the graphic layer do not necessarily have to be the same as a whole, and the diameters of the holes may be changed according to the width, area, etc. of the parts such as symbols, characters, and figures. In general, the hole diameter is relatively small in areas where the width of symbols, characters, figures, etc. is narrow and the area is small, and conversely the hole diameter is relatively large in areas where this width is wide and the area is large. Good. This is because the sensitivity differs between the portion that is viewed finely and the portion that is roughly viewed due to the characteristics of the human eye.

Here, the effect of the present invention will be described together with the design of the sign.
FIG. 2 is a conventional sign. In the figure, (a) is a traffic sign set forth by laws and regulations such as the Road Act, Road Traffic Act and Road Signing Ordinance, and (b) is a sign indicating a disaster evacuation exit defined by the laws and regulations ( c) is a general attention sign defined by the above-mentioned laws and regulations. Colors are defined by laws and regulations, and in the closed sign in (a), the parts 0200a to 0204a are white, the parts 0205a and 0206a are red, and the letter part 0207a is blue. In the sign indicating the emergency exit of (b), the part 0200b is white and the parts 0201b and 0202b are green. In the general attention sign (c), the parts 0201c and 0202c are black and the part 0203c is yellow.

  It should be noted that colors are strictly determined by laws and regulations. Even if there is no strict stipulation of laws and regulations, there are colors that recognize specific meanings from colors according to social wisdom, and there are many signs that make use of these features. For these signs, in the conventional method of making visible even at night, for example, (a) each part of 0205a, 0206a, and 0207a of the road closing signs is composed of an opaque film, and 0200a to 0204a The part is composed of a phosphorescent material. In this case, the portions 0205a and 0206a and the portion 0207a are visually recognized as black instead of red or blue at night.

  Further, (b) the parts 0201b and 0202b of the sign indicating the emergency exit are both made of a non-translucent film, and the part 0200b is made of a phosphorescent material. In this case, the portions 0201b and 0202b are visually recognized as black instead of green at night.

  Further, (c) each part of the general attention sign is formed of an opaque film. In this case, the portion 0203c is visually recognized as black instead of yellow at night.

  As described above, the color defined to be stipulated under laws and regulations etc. under the sunlight is not visible in an environment where there is no night illumination, only the color of the phosphorescent material in the background is visually recognized as the emission color, The film part is visually recognized as black. As a compromise to alleviate such a situation, it is conceivable to make the film semi-transparent, but if it is made semi-transparent, the color under sunlight cannot be made a predetermined color. By solving the above problems, it is possible to visually recognize the color as intended even in an environment where there is no illumination at night even under sunlight.

  FIG. 3 is a diagram showing a marker of the present invention. 3 correspond to (a), (b), and (c) in FIG. 2, respectively. 2 differs from the prior art sign in FIG. 2 in the fine holes (0310a) in the parts 0205a and 0206a and 0207a in (a), in the parts 0201b and 0202b in (b), and in the whole (c). , 0310b and 0310c) are provided in large numbers.

  As described above, by providing a large number of holes in the film portion in this way as a graphic layer, the light from the light emitting layer passing through the holes is diffusely reflected on the inner surface of the hole and the graphic layer It appears on the surface of the sign as colored light. In addition, light from the light emitting layer is diffusely reflected by fine dust or water vapor in the air layer, hits the surface of the graphic layer, and becomes light of the color of the graphic layer and is visually recognized by the viewer.

  On the other hand, this hole is so fine that it is not noticeable that it is not noticeable for those who see the sign.

  In addition, the example of a label | marker is not limited to this, This structure can be employ | adopted about various label | markers.

    FIG. 9 is a perspective view illustrating the effect of fine holes in the graphic layer. In the “graphic layer” 0903 arranged on the “light emitting layer” 0902 on the “base” 0901 shown in the figure, there are a plurality of “holes” 0910 that reach the light emitting layer. The state where the light emitted from the light emitting layer is indicated by “arrows” 0920 is shown. As shown in the figure, the light emitted from the surface of the light emitting layer that is in contact with the hole of the graphic layer is emitted to the outside as it is, and reflected to the side of the graphic layer to the outside. It is injected.

  Furthermore, FIG. 10 is shown. This figure is a cross-sectional view on the AA plane of the label of this embodiment described with reference to FIG. When the light from the “light emitting layer” 1001 is reflected in contact with the side surface of the “graphic layer” 1002, the light is emitted to the outside with a light emission color corresponding to the color of the graphic layer. Therefore, a person who sees the sign of the present embodiment can visually recognize the color around the hole, that is, the color of the graphic layer.

  FIG. 11 is a conceptual diagram for explaining a method of manufacturing the circular regulation mark of FIG. A “base” 1101 shown in the figure has a bowl shape, and a light-emitting layer is formed by a method of fitting a preliminarily formed “phosphorescent material” 1102 on the base. Furthermore, it is possible to form a graphic layer by a method of attaching a “film” 1103 on which a pattern is printed in advance on the light emitting layer, and to manufacture the label of this embodiment in this manner.

  Further, FIG. 12 is an enlarged view of a portion surrounded by a broken line in the graphic layer shown in FIG. As shown in the figure, a plurality of fine “holes” 1210 are formed on the surface of the “graphic layer” 1203, and although not shown, all of these holes penetrate to the back surface.

<Effect>
According to the present invention having the above-described configuration, it is possible to provide a sign that can visually recognize the color of a figure or a character even in a dark environment indoors or outdoors.

<< Example 2 >>

<Overview>
The basic structure of the invention of this embodiment is the same as that of the present invention described in Embodiment 1, except that a transparent coating layer is further provided on all or part of the upper layer of the graphic layer.

<Configuration>
The invention of the present embodiment can be based on the configuration of the first embodiment, and further has a transparent coating layer at least partially on the graphic layer. The configuration and action of the “coating layer” will be described below.

<Description of each configuration>
The “coating layer” is a transparent layer provided on the upper layer of the graphic layer. It may be directly above the graphic layer, or may be formed after the third layer is interposed therebetween.

  Although it named the coating layer, it does not necessarily need to be formed by coating, and you may comprise by sticking a transparent film. Of course, it may be formed by coating. In the case of coating, a coating solution dissolved in a solvent is applied to the upper layer of the graphic layer and dried to form the coating layer. The thickness is preferably uniformed as designed. For example, it may be vapor coated. Depending on how this layer is formed, there will be some difference in this sign. This may cause these substances to enter the holes in the graphic layer when spraying, applying, or hitting liquids or vapors. However, when a film is applied, the inside of the graphic layer becomes a space. Is a point. In the former case, irregularities may be formed on the upper peripheral edge of the hole. This is effective for irregular reflection of light and is effective as an auxiliary means for achieving the object of the present invention.

  As a material for the coating layer, a method of spraying glass or the like is conceivable. However, for the same reason as described in the light emitting layer of Example 1, it is preferable to use a silicone resin for the coating layer.

  In the case of forming a coating layer using a film, there is an advantage that the coating layer is easily formed. However, if a matte film is used without using a film with a smooth surface, the light scattering will be active on the matte surface, which is also effective for achieving the object of the present invention. Auxiliary means. In addition, you may form a coating layer in the procedure which affixes the film whose surface mentioned above is smooth and roughens the surface afterwards. As a method of roughening the surface, it is conceivable that the surface is roughened by chemical treatment in addition to a method of physically roughening, for example, a method using sandpaper or sandblast.

  FIG. 13 is a diagram showing an example of a cross-sectional view of the sign of this example. The “signature” 1300 in FIG. 1 includes a “base” 1301, a “light emitting layer” 1302, a “graphic layer” 1303, and a “coating layer” 1304, and the graphic layer has a large number of fine “holes” 1310. doing.

  FIG. 14 is a diagram showing another example of the cross-sectional view of the sign of this embodiment. The “label” 1400 in FIG. 1 includes a “base” 1401, a “light emitting layer” 1402, a “graphic layer” 1403, and a “coating layer” 1404, and further includes a “reflection layer” 1405. The graphics layer has a number of fine “holes” 1410.

  FIG. 15 is a conceptual diagram for explaining a light emission mode in the sign of this embodiment. When the light emitted from the “light emitting layer” 1501 passes through the hole of the “graphic layer” 1502, it collides with the inner wall of the graphic layer and is diffusely reflected and emitted to the outside as light of the color of the graphic layer. The light emitted without hitting the inner wall of the graphic layer is also diffusely reflected on the surface of the “coating layer” 1503. As a result, when it is further reflected on the surface of the graphic layer, it is also emitted to the outside as light of the color of the graphic layer.

<Effect>
According to the present invention having the above configuration, it is possible to make the color easier to visually recognize than the sign of Example 1.

0100 ... Signal, 0101 ... Base, 0102 ... Light emitting layer, 0103 ... Graphic layer, 0110 ... Hole

Claims (10)

Base and
A light emitting layer disposed on the base;
A non-light emitting graphic layer that is arranged to represent characters or / and figures on at least a part of the light emitting layer and has many fine holes reaching the light emitting layer;
A sign consisting of   The sign according to claim 1, further comprising a transparent coating layer on at least a part of the graphic layer.   The label according to claim 1 or 2, wherein the light emitting layer comprises a phosphorescent material and / or a fluorescent material.   The sign according to claim 3, wherein the graphic layer is made of a material having a color that cannot be expressed by the light emitting layer.   The sign according to any one of claims 1 to 4, wherein the graphic layer is a material based on a silicone-based material.   The label according to any one of claims 2 to 5, wherein the coating layer is a material based on a silicone-based material.   7. The label according to claim 3, wherein the light-emitting layer is a material based on a silicone-based material.   The sign according to any one of claims 1 to 7, wherein the luminescent color of the graphic layer and the luminescent layer is close to the luminescent color.   The sign according to any one of claims 1 to 8, wherein the fine hole is a hollow cylindrical dot hole.   The sign according to any one of claims 1 to 9, wherein a reflective layer is formed at an interface of the light emitting layer of the base.

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