JP6656746B2 - Sign - Google Patents

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.

  2. Description of the Related Art Conventionally, various techniques for facilitating visual recognition of displayed contents of a sign in a dark environment such as outdoors at night or unmanned facilities have been known. For example, by illuminating the display using illumination means, the display content can be made visible. Also, there is widely known a technique in which a display device is illuminated by using a light-storing material, or the display itself is made to emit light so that the display content can be visually recognized, without using a lighting unit requiring a power supply. Patent Literature 1 discloses a technique for emitting a symbol, a character, or the like with a light storage material that mainly emits yellow to green to make it visible.

JP 2007-108473 A

  As described above, symbols, characters, figures, and the like emit light by the technology described in Patent Document 1, and the symbols, characters, figures, and the like can be recognized, but information cannot be given to the background of the symbols, characters, figures, and the like. Was. On the other hand, some signs make sense including the background of symbols, characters, figures, and the like. In particular, not only the signs but also the display colors of the signs installed outdoors have important meanings, and many of them are required by law or custom to be associated with a specific meaning.

  For example, a sign including a red display is a sign having a meaning including some prohibited matter (a regulatory sign or the like), and a sign including a yellow display is often a sign (a warning sign or the like) that calls attention to something. . Signs containing blue display have many meanings for information transmission (instruction signs, information signs, etc.), and signs containing green display have meanings to relax the viewer and provide safety and security (evacuation guidance signs). , Highway signs, etc.).

  Such signs can be recognized by the target color in the daytime or at night under illumination, including symbols, characters, figures, etc. Among them, the area that emits light by the luminous material etc. can be recognized as such, but the area that does not emit light without using the luminous material, for example, composed of a film without light transmission, even if the film itself has color There was a problem that the color was visually recognized as black and the original color of the sign was lost.

  In order to solve the above-described problems, the present invention provides a base, a light emitting layer disposed on the base, and a light emitting layer disposed on at least a part of the light emitting layer to represent characters or / and graphics. We propose a non-light-emitting graphic layer having a large number of fine holes, and a sign made of the same.

  According to the present invention having the above-described configuration, it is possible to provide a sign that allows the color of a figure or a character to be visually recognized even in a dark environment indoors and outdoors.

FIG. 4 is a diagram illustrating an example of a cross-sectional view of the sign of the first embodiment. Figure showing an example of a conventional sign The figure which shows an example of the marker of this Example which shows the same content as each marker shown in FIG. FIG. 3 is a perspective view illustrating an example of a sign base according to the first embodiment. The figure which shows another example of the cross-sectional view of the marker of Example 1. The figure which shows another example of the cross-sectional view of the marker of Example 1. The figure which shows another example of the cross-sectional view of the marker of Example 1. The figure which shows another example of the cross-sectional view of the marker of Example 1. FIG. 2 is an enlarged perspective view showing an example of the sign of the embodiment. Sectional view on the AA plane of the sign of Example 1 described using FIG. FIG. 3 is a conceptual diagram for explaining a method of manufacturing a circular regulation sign among the signs shown using FIG. 3. Enlarged view of part of FIG. The figure which shows an example of the cross-sectional view of the marker of Example 2. The figure which shows another example of the cross-sectional view of the marker of Example 2. FIG. 4 is a conceptual diagram showing an example in which light is emitted by the sign of Embodiment 2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The mutual relationship between the embodiments and the claims is as follows. First, the first embodiment 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. The present invention is not limited to these embodiments at all, and can be implemented in various modes without departing from the gist of the invention.

<< Example 1 >>

<Overview>
In the sign of the present embodiment, a non-light-emitting graphic layer representing a character or a graphic to be a part of the sign is arranged on at least a part of the light-emitting layer arranged on the base, and the graphic layer reaches the light-emitting layer. It is characterized by having many fine holes.

<Structure>
FIG. 1 is a diagram illustrating an example of a cross-sectional view of the sign of the present embodiment. The “marker” 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 sign of the present embodiment are not particularly limited. Therefore, for example, the present invention can be realized with signs of various sizes and shapes from large ones such as road signs and signboards to small ones such as guide signs attached to walls near the feet.

  The “base” 0101 is used to increase the mechanical strength of the sign, and is made of various metals, strong plastic, hard rubber, and the like. If the sign is installed outdoors, it is necessary that the sign has 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.The base has a light emitting function instead of a mere stack of materials. It may have a dish shape. Aluminum, stainless steel, or the like is often used as the material, and in the case of a bowl shape, it may be formed by extrusion molding, engraving molding, or the like.

  4 (a), 4 (b) and 4 (c) are perspective views showing only the base portion when the sign base of the present embodiment is formed in a bowl shape. FIG. 2A shows a base of a circular sign, FIG. 2B shows a base of a square sign, and FIG. A characteristic point is that the bottom surface (0401a, 0401b, 0401c) of the base is flat, and the wall surface (0402a, 0402b, 0402c) stands upright around the bottom surface. The wall functions to protect the light emitting layer formed on the base and the side end surface of the graphic layer disposed on the light emitting layer. Therefore, it is preferable that the height of the wall surface is a value larger than the sum of the thickness of the light emitting layer and the thickness of the graphic layer.

  The process of forming the light emitting layer on the bowl-shaped base can be devised. For example, a luminous material is stored in a state of being dissolved in a solvent. The luminous layer can be formed by pouring the material into the bowl and drying. By taking such a process, a light emitting layer having a flat surface can be obtained, which is convenient.

  Note that it is also possible to provide a reflection layer on the bottom surface of the bowl-shaped base before pouring the material for the light emitting layer in this way. The reflective layer is usually made of a white substance, and a typical one is titanium oxide. Alternatively, for example, a method in which a white pigment such as silica is mixed with a solution of an acrylic resin or a polycarbonate resin or the like and used as a film at the interface of the light emitting layer of the base may be used. Among them, titanium oxide is particularly excellent in reflectivity and is most suitable as a reflector. When titanium oxide is also supplied by being dissolved in a solvent, it can be formed by pouring as in the case of the phosphorescent material of the light emitting layer. This is because a reflection 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 “sign” 0800 includes a bowl-shaped “base” 0801, a “reflection layer” 0820, a “light-emitting layer” 0801, and a “graphic layer” 0802, and the graphic layer includes a number of fine “holes” 0810. Have.

In addition, in order to form a light emitting layer when a bowl-shaped base is used, it is also possible to form the light emitting layer by a method of simply fitting a light storage material previously solidified in a mold having the same shape separately. . In this way, there is an advantage in that a large amount of solidified phosphorescent material is produced, and a base is procured at the stage when an order is generated and quickly assembled, so that the product can be delivered in a short delivery time.

  FIG. 5 is a cross-sectional view when a light emitting layer and a graphic layer are formed on such a bowl-shaped base. The “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 a number of fine “holes” 0510. The approximate thickness is preferably about 0.3 to 4.2 mm, more preferably about 0.8 to 3.5 mm. The thickness of the base may be from about 0.8 mm to about 1 mm, but may be variously designed depending on its installation location and shape as described above.

    FIG. 6 shows an example of a sign adopting a bowl-shaped base as in FIG. 5, but FIG. 6 shows an example in which the light emitting layer is not a phosphorescent material but a light source such as an LED. The “marker” 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. The graphic layer has a number of fine “holes” 0610. Have. Below 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 when power is supplied to the LED, but in order to cope with a power outage or the like, the power used by this sign is always stored in a secondary storage battery or the like for emergency use. Is preferred. The power source may be a normal power line or a system that stores electricity during the day by solar power generation. A primary storage battery may be used as long as it is used only in an emergency. Although FIG. 1 shows an example in which the “light storage layer or fluorescent layer” 0602 is provided, this may be omitted.

  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 for emitting invisible light (ultraviolet light). In particular, by employing a configuration that emits ultraviolet light, it becomes possible to efficiently irradiate a light emitting layer made of a fluorescent material with light.

  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 “marker” 0700 includes a bowl-shaped “base” 0701, a “luminescent 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 provided below the light emitting layer, and a “light source” 0704 such as an LED light is further provided below the base.

  The difference is that a transparent layer 0705 formed using glass or the like is provided as compared with the one shown in FIG. In the sign of FIG. 6, the LED is embedded in the “transparent material” 0604, but in the sign of FIG. 7, the upper space 0706 of the LED is a space in which nothing is arranged. I have arranged. In this way, even when light incident on the light emitting layer 0702 made of a phosphorescent material or a fluorescent material is reflected on the upper surface and returns, the light is re-reflected by the transparent plate, and light energy can be effectively used. is there.

  The “light-emitting layer” is a layer that emits light. Typically, it is a luminous 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 so as to be exposed when observed from the front 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, in the case of observing and exposing from the front side, it is necessary to adjust the color so that the sign is visually recognized as the originally intended color under the sunlight or under illumination. For example, if the target color is light green, a material that is recognized as light green under sunlight is selected as the luminous material.

  If the target color is not the original color of the luminous material, a luminous material whose color is adjusted by mixing a dye, a pigment or the like is selected. Note that the thickness of the light emitting layer is preferably about 0.3 mm to 4.2 mm. Further, the thickness is preferably about 0.8 mm to 3.5 mm. The type of the phosphorescent material is not particularly limited, but for example, acrylic, vinyl, ethoxy, urethane, silicone, and other resins can be used. The light emitting layer may be formed using a paint, or may be formed by a method such as attaching a film or the like. When the sign is installed indoors, it is possible to continuously achieve suitable light emission with an acrylic resin or the like.However, when the sign is installed outdoors, a paint using a urethane resin having high weather resistance is applied. It is desirable to use

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

  The emission color of the light-emitting layer may be generally yellow-green or bluish-green, and any emission color may be employed. However, it is preferable that the emission color of the light-emitting layer is arranged to be close to the color arrangement of the graphic layer described later. Here, as an example, it is conceivable that a color whose RGB values are close to each other is set to a close color. However, broadly, yellow green is selected when the graphic layer is arranged in a warm color, and bluish green is selected in a cool color. Is preferred. By employing 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 holes in the graphic layer described later.

  The “graphic layer” is arranged on the light emitting layer to constitute symbols, characters, figures, and the like excluding the background of the sign. The color of the graphic layer also needs to be the original target color of the sign under sunlight. For example, green, red, yellow, etc. As described above, the object of the present invention is to make the sign visually recognizable in the originally intended color even in sunlight or in an environment without nighttime illumination. However, the present invention provides a solution particularly when the graphic layer is non-light emitting and opaque. If an opaque film is placed on the light-emitting layer and symbols, characters, figures, etc. are to be displayed with the film, the film will be viewed in its original color under sunlight, This solves the problem that, in an environment without light, the light-emitting layer in the background emits light, but the area of the film is visually recognized as black, and the sign is not visually recognized in the originally intended color. Therefore, in the sign of the present embodiment, 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, a particularly excellent effect is obtained in that the sign becomes visible in the originally intended color. To produce

    In the present invention, as a means for this, a large number of small holes are provided particularly in the light-impermeable film, and the holes are penetrated so as to reach the surface of the light emitting layer which is the lower layer. The aim is that the light from the light-emitting layer that enters the hole from that area is irregularly reflected on the cross-section of the opaque film, so that the color of the film becomes apparent, and the original color of the film can be viewed under sunlight. It is possible. For the same reason as described for the light emitting layer, it is particularly preferable to use a silicone resin for the graphic layer.

  The diameter of the hole is suitably about 0.1 mm to 5 mm. If the diameter of the hole is too small, light from the light emitting layer is attenuated before reaching the surface of the graphic layer, and the color of the graphic layer cannot be sufficiently delivered to the surface. On the other hand, if it exceeds 4 mm, the color of the light-emitting layer will be discolored, and rather the original color of the graphic layer will be faded.

  Further, the shape of the hole is preferably a hollow cylindrical dot hole shape. The cylindrical shape facilitates irregular reflection of light on the inner side surface of the hole. As a result, the color of the light emitted from the outside can be more clearly recognized in the color of the graphic layer.

  The thickness of the graphic layer is suitably about 0.01 mm to 1 mm. 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 luminescent layer will be less diffusely reflected at the cross section of the graphic layer. The color of the graphic layer cannot be sufficiently transmitted to the surface of the sign. Conversely, if the thickness is more than 1 mm, the light from the light emitting layer is attenuated before reaching the surface of the sign, and the color of the graphic layer cannot be transmitted to the surface.

  Numerous iterations of trial and error suggest that a suitable thickness of the graphics layer in the range of 0.02 to 0.3 millimeters for hole diameters of 1 to 2.5 millimeters.

In addition, the graphic layer may be arranged with a film provided with holes in advance on the light emitting layer using an adhesive or the like, or a film without holes may be arranged on the light emitting layer, and then the light emitting layer A hole to reach may be made.

Further, the diameter of the holes provided in the graphic layer does not necessarily have to be the same as the whole, and the diameter of the holes may be changed according to the width, area, and the like of the symbols, characters, figures, and the like. In general, the width of a part such as a symbol, a character, or a figure is narrow, and the diameter of the hole is relatively small in an area having a small area, and conversely, the diameter of the hole is relatively large in an area having a large width and a large area. Good to do. This is because the sensitivity is different between a part that is viewed in detail and a part that is viewed roughly according 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 shows a conventional sign. In the figure, (a) is a traffic stop sign defined by laws and regulations such as the Road Law and the Road Traffic Law and the Road Sign Decree, (b) is a sign indicating a disaster evacuation exit defined by the laws and regulations, c) is a general caution sign defined by the above-mentioned laws and regulations. The colors are determined by laws and regulations, respectively. Regarding the traffic stop sign of (a), the portions 0200a to 0204a are white, the portions 0205a and 0206a are red, and the characters 0207a are blue. In the sign indicating the evacuation exit at the time of disaster (b), the portion of 0200b is white, and the portions of 0201b and 0202b are green. In the general caution sign of (c), the portions of 0201c and 0202c are black, and the portion of 0203c is yellow.

  It should be noted that colors are strictly determined by laws and regulations. Even signs that are not strictly stipulated by laws and regulations have colors that recognize a specific meaning from colors in accordance with conventional wisdom, and there are also not a few signs that make use of these characteristics. According to the conventional method of making these signs visible even at night, for example, (a) each part of 0205a, 0206a, and 0207a of the closing sign is formed 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) each of the portions 0201b and 0202b of the sign indicating the evacuation exit at the time of disaster is formed of a light-impermeable film, and the portion of 0200b is formed of a luminous 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 caution sign is formed of an opaque film. In this case, the portion 0203c is visually recognized in black at night instead of yellow.

  As described above, the coloring specified by laws and ordinances for coloring under sunlight is not visible in an environment where there is no illumination at night, and only the color of the background phosphorescent material 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. However, if the film is made semi-transparent, the color under sunlight cannot be a predetermined color. By resolving the above problems, it was possible to visually recognize the colors as intended even in an environment without sunlight or nighttime illumination.

  FIG. 3 is a diagram showing the sign of the present invention. FIGS. 3A, 3B, and 3C correspond to FIGS. 2A, 2B, and 2C, respectively. The difference from the prior art marker of FIG. 2 is that the small holes (0310a and 0207a and 0206a) and (0207a and 0202b) and (b) and (c) respectively correspond to 0205a and 0207a in FIG. , 0310b, and 0310c).

  As described above, by providing such a large number of holes in the film portion to form a graphic layer, light from the light-emitting layer passing through the hole is irregularly reflected on the inner surface of the hole, and the graphic layer is formed. It appears as colored light on the sign surface. The light from the light emitting layer is also irregularly reflected by fine particles and water vapor in the air layer and hits the surface of the graphic layer. The light of the color of the graphic layer is visually recognized by a person who sees the sign.

  On the other hand, since this hole is so small that the hole is not noticeable and open, it does not make the sign viewer feel uncomfortable.

  The example of the sign is not limited to this, and this structure can be adopted for various kinds of signs.

    FIG. 9 illustrates the effect of the fine holes in the graphic layer in a perspective view. The “graphics layer” 0903 disposed on the “light-emitting layer” 0902 on the “base” 0901 shown in the same drawing has a plurality of “holes” 0910 reaching the light-emitting layer. The light emitted from the light emitting layer is indicated by an “arrow” 0920. As shown in the figure, the light emitted from the surface of the light emitting layer that is in contact with the hole in the graphic layer is emitted to the outside as it is, and is reflected to the side surface of the graphic layer to the outside. Be injected.

  FIG. 10 is further shown. FIG. 14 is a cross-sectional view of the sign of the present 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 in an emission color according 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 shown in FIG. A “base” 1101 shown in the figure has a bowl shape, and a light-emitting layer is formed by a method in which a preformed “phosphorescent material” 1102 is fitted on the base. Furthermore, a graphic layer is formed by a method of attaching a “film” 1103 on which a pattern is printed in advance on the light emitting layer, and the sign of the present example can be manufactured in this manner.

  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, each of these holes penetrates to the back surface.

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

<< Example 2 >>

<Overview>
The invention of this embodiment has the same basic configuration as that of the present invention described in the first embodiment, but has a transparent coating layer on all or a part of the upper layer of the graphic layer.

<Structure>
The invention of this embodiment can be based on the configuration of the first embodiment, and further has a transparent coating layer on at least a part of the graphic layer. Hereinafter, the configuration and operation of the “coating layer” will be described.

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

  Although named as a coating layer, it is not necessarily required to be formed by coating, and may be constituted by pasting a transparent film. Of course, it may be formed by coating. In the case of coating, it is formed by applying a coating solution dissolved in a solvent to the upper layer of the graphic layer and drying it, but it is preferable that the thickness is made uniform as designed. For example, steam coating may be used. Depending on the way in which this layer is formed, some differences can be made in this marker. This means that when spraying, wetting or applying liquid or vapor, these substances may enter the holes in the graphic layer, but when attaching a film, 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, but 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 of the coating layer, a method of blowing glass or the like can be considered. Here, for the same reason as described in the light emitting layer of Example 1, it is particularly preferable to use a silicone resin for the coating layer.

  When a coating layer is formed using a film, there is an advantage that the coating layer is easily generated. However, if a matte film is used without using a film with a completely smooth coating layer, light scattering becomes active on the matte surface, so that it is also effective for achieving the object of the present invention. It becomes an auxiliary means. The coating layer may be formed by applying a smooth film on the surface and then roughening the surface afterwards. As a method of roughening the surface, a method of physically roughening the surface, for example, a method of using sandpaper or sandblasting, or a method of roughening the surface by a chemical treatment can be considered.

  FIG. 13 is a diagram illustrating an example of a cross-sectional view of the sign of the present embodiment. The “sign” 1300 in the figure 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. are doing.

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

  FIG. 15 is a conceptual diagram for explaining the light emission mode of the sign of this embodiment. The light emitted from the “light-emitting layer” 1501 collides with the inner wall of the graphic layer when passing through the hole of the “graphic layer” 1502, and is diffused and reflected to emit light of the color of the graphic layer to the outside. Light that has been emitted without hitting the inner wall of the graphic layer is also irregularly reflected on the surface of the “coating layer” 1503 and, when further reflected on the surface of the graphic layer, is also emitted outward as light of the color of the graphic layer.

<Effect>
According to the present invention having the above configuration, the color of the sign can be more easily recognized than the sign of the first embodiment.

0100 sign, 0101 base, 0102 light emitting layer, 0103 graphic layer, 0110 hole

Claims (9)

Base and
In the light-emitting layer disposed on the base , the light-emitting color is yellow-green in a portion where the graphic layer is a warm color, and the light-emitting color is blue-green in a portion where the graphic layer is a cool color. A light- emitting layer that emits light,
Arranged at least partially on the light emitting layer to represent characters or / and figures, and in a dark environment, light from the light emitting layer is irregularly reflected on its cross section and the like to reach the surface of the sign composed of the graphic layer, A non-light-emitting graphic layer having a plurality of holes for allowing the color of the graphic layer to become apparent and enabling the entire graphic layer to be visible as a marker;
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 sign according to claim 1 or 2, wherein the light-emitting layer is made of 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 different from the emission color of the light emitting layer.   5. The sign according to claim 1, wherein the graphic layer is a material based on a silicone-based material.   The sign according to any one of claims 2 to 5, wherein the coating layer is a material based on a silicone-based material.   The sign according to any one of claims 4 to 6, 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 fine hole is a hollow cylindrical dot hole.   The sign according to any one of claims 1 to 8, wherein a reflective layer is formed at an interface of the light emitting layer of the base.

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