JP6347033B2 - Phosphorescent structure and road signs and evacuation guidance signs using the same - Google Patents

Description

  The present invention relates to a phosphorescent structure, and road signs and evacuation guidance signs using the same.

It is desirable that a road sign for evacuation guidance in a disaster or a phosphorescent structure for illuminating an evacuation guidance sign be capable of emitting light with high brightness over a long period of time. In addition, since such a phosphorescent structure is often arranged in a narrow space such as a road surface or a wall surface, it is desirable that the light storage structure has a compact size.
Regarding a phosphorescent structure capable of emitting light with high brightness over a long period of time, Patent Document 1 discloses a device that irradiates a phosphorescent material with UVLED (Ultra Violet Light Emitting Diode) light. A sheet in which a reflective sheet provided with a plurality of holes is disposed between the two is disclosed. In this document, the phosphorescent material is directly irradiated from the LED, and the light emitted from the rear surface of the phosphorescent material toward the reflecting sheet is reflected / scattered in the space between the reflecting sheet and the phosphorescent material by the reflecting action of the reflecting sheet. After repeating, it is described that light can be emitted with high brightness even when not energized by being efficiently emitted from the side of the space to the outside (see Patent Document 1).

JP2013-045675A

  In the apparatus disclosed in Patent Document 1, as described above, by providing a space between the phosphorescent material and the reflection sheet, the light emitted from the back surface of the phosphorescent material is reflected and scattered in the space, and this light Can be efficiently emitted from the side of the apparatus to the outside. However, in the apparatus according to the invention described in the document, it is indispensable to provide a space for the following reason, and it can be said that the size thereof needs to be considerably large. That is, in the same device, it is necessary to irradiate light on the entire surface of the phosphorescent material in order to make the phosphorescent material shine with high brightness. Therefore, in order for the irradiation surface of the highly directional LED light to be spread over the entire surface of the phosphorescent material, the phosphorescent material must be disposed at a position that is considerably away from the LED. As a result, the space generated between the LED light source and the phosphorescent material has to be of a considerable size, and it has been difficult to make the phosphorescent structure compact.

  The present invention has been made in view of the above points, and the problem to be solved is that the luminous material is made to have high brightness by reflecting and diffusing the light emitted from the back surface of the luminous material with the reflecting material and irradiating the luminous material again. An object of the present invention is to provide a phosphorescent structure that is easier to arrange in a narrow space such as a road surface or a wall surface by making the size of the phosphorescent structure that can emit light more compact.

  In order to solve the above-mentioned problems, among the present inventions, the first invention is a planar light-emitting body that emits light in a planar shape, a back surface facing the planar light-emitting body, and the surface functions as a light reflecting surface. In addition, a light passing reflector having a light passage hole arranged in a plane shape that passes light from the planar light emitter, and a surface shape that stores light by light that passes through the light passage hole or is reflected by the light reflection surface A phosphorescent structure comprising the phosphorescent material is provided.

  Moreover, 2nd invention provides the luminous storage structure which a planar light-emitting body consists of the light source arrange | positioned in a surface edge part, and the light-guide plate which guides the light from a light source on the basis of 1st invention. To do.

  Moreover, 3rd invention provides the phosphorescent structure which has a diffusion plate for diffusing the light from a light passage hole between a phosphorescent material and a light passage reflection material based on 1st or 2nd invention. To do.

The fourth invention provides a phosphorescent structure in which the light is UV light based on any one of the first to third inventions.
Moreover, 5th invention provides the phosphorescent structure which has a graphic layer for raising a pattern with the light from a phosphorescent material on the upper surface of a phosphorescent material on the basis of any one invention of 1st to 4th. .

  The sixth invention provides a phosphorescent structure according to any one of the first to fifth inventions having an intermittent mechanism for intermittently emitting the light.

  The seventh invention is based on the third invention or any one of the fourth to sixth inventions based on the third invention, and the light passage holes have a pitch of 1 mm to 3 mm and a hole diameter of 0 mm. A phosphorescent structure having a thickness of 5 mm to 1.5 mm and a diffusion plate thickness of 3 mm to 5 mm is provided.

  The eighth invention provides a road sign using the phosphorescent structure according to any one of the first to seventh inventions.

  The ninth invention provides an evacuation guidance sign using the phosphorescent structure according to any one of the first to seventh inventions.

  According to the present invention, by using a surface light source as the light source, it is possible to irradiate the entire surface of the phosphorescent material disposed at a short distance from the light source. For this reason, the size of the phosphorescent structure that can cause the phosphorescent material to emit light with high luminance by reflecting / diffusing the light emitted from the back surface of the phosphorescent material and irradiating the phosphorescent material again with a reflecting material is made more compact, Therefore, it is possible to provide a phosphorescent structure that is easier to arrange in a narrow space such as a road surface or a wall surface.

The figure which shows the outline | summary of a structure of the luminous structure of Example 1. The figure which shows an example of the shape and structure of a planar light-emitting body The figure which shows an example of the shape and structure of a light passage reflection material The figure which shows the outline | summary of a luminous structure structure provided with a graphic layer and a transparent protective layer The figure which shows an example of the shape of the road sign using the luminous structure of Example 1 The figure which shows an example of the shape of the evacuation guidance sign using the luminous structure of Example 1 The figure which shows an example of the shape of the light passage hole and diffuser plate in Example 2.

0100 Light storage structure 0110 Planar light emitter 0120 Light transmission reflector 0130 Light storage material 0140 Space 0111 between the light transmission reflection material and the light storage material Light guide plate 0212 LED
0321 Sheet-like member 0322 Light passage hole 0323 Reflector 0450 Graphic layer 0460 Transparent protective layer 0770 Diffuser

  Examples of the present invention will be described below. The relationship between the embodiments and the claims is as follows. Example 1 mainly relates to claims 1, 2, 5, 8, 9, etc., Example 2 mainly relates to claims 3, 7, etc., and Example 3 mainly The fourth embodiment mainly relates to claim 6 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.

<Overview>
The phosphorescent structure of the present embodiment is composed of a planar light emitter, a light transmission reflecting material, and a phosphorescent material. The light transmission reflecting material is disposed with the back surface facing the planar light emitter and the front surface facing the phosphorescent material. Moreover, the said light passage reflection material has a surface which functions as a light passage hole and a light reflection surface. With such a configuration, the phosphorescent structure of the present embodiment performs phosphorescence in the phosphorescent material by the light from the planar light emitter that has passed through the light transmitting reflector and the light reflected by the light reflecting surface.

<Configuration>
(General)
FIG. 1 shows an outline of the configuration of the phosphorescent structure according to this embodiment. As shown in this figure, the phosphorescent structure 0100 of the present example is composed of a planar light emitter 0110, a light transmission reflector 0120 (shown by a left-upward oblique line) disposed on the surface side, and further on the surface side. (For the sake of convenience, the upper side of this figure will be described as the front side, and the lower side will be described as the back side. The same applies hereinafter). The light passage reflecting material is provided with light passage holes 0121 (symbols are given to only one place to avoid complexity, but nine are provided in the figure). As will be described later, light emitted from the surface of the planar light emitter that has been repeatedly reflected and scattered in the planar light emitter through the light passage hole (the thin line arrows indicate the path of light) is applied to the phosphorescent material. Is done. A space 0140 for repeating light reflection and scattering is provided between the light-passing reflective material and the phosphorescent material. Alternatively, a transparent material such as a transparent acrylic resin may be disposed in place of this space, and according to such a configuration, light is repeatedly reflected and scattered between the light-passing reflective material and the phosphorescent material. It becomes possible to implement | achieve suitably.

(Planar light emitter)
The planar light emitter is a light emitter that emits light in a planar shape. “Surface” means that the light source is not in the form of dots or lines, but in the state of a surface having a certain width and length. The meaning of making the illuminant planar is to be able to irradiate the entire surface with light even from a short distance to the phosphorescent material.

  The light source may be a visible light source, a UV light source or a black light source (the case of a UV light source will be described in detail in another embodiment).

  FIG. 2 shows an example of the shape and configuration of the planar light emitter. (A) is a top view, (b) is the XX sectional view of (a). The planar light-emitting body 0210 shown in this example includes a plate-shaped light guide plate 0211, and an LED 0212, for example, is disposed as a light source in a case 0214 provided at an end thereof. In the example of this figure, six LEDs are arranged, but the number is appropriately selected according to the dimensions of the light guide plate so that the light reaches the entire light guide plate. Moreover, although the example which has arrange | positioned LED only to one edge part of a light-guide plate was shown in this figure, you may arrange | position to both ends. The light guide plate is made of, for example, transparent resin or transparent glass. The light introduced from the LED to the light guide plate is guided to the entire light guide plate while being irregularly reflected in the light guide plate, and emitted from the surface of the light guide plate (the surface on which the phosphorescent material is disposed). In addition, in order to more suitably emit light from the surface of the light guide plate to the front surface side, as shown in this figure, a reflection layer for reflecting light toward the inside of the light guide plate on the entire back surface side of the light guide plate It is desirable to provide 0213 (shown in black). If comprised in this way, the light which diffused diffusely in the light-guide plate will not be inject | emitted on the back surface side of a light-guide plate, but almost all light may finally be inject | emitted on the surface side of a light-guide plate. It becomes possible.

  Moreover, you may fill the gel 0215 in the case which accommodates LED like the example of this figure. This gel is desirably a material having a refractive index close to that of the material constituting the light guide plate. With such a configuration, it is possible to suppress attenuation when light from the LED is introduced into the light guide plate, and to efficiently incorporate light into the light guide plate.

  As described above, the planar light emitter is configured to be able to irradiate the entire surface with light even from a short distance to the phosphorescent material, so that a highly directional LED is conventionally directed to the phosphorescent material. Unlike direct irradiation, the distance from the LED light source to the phosphorescent material does not need to be increased considerably, which contributes to making the phosphorescent structure compact. Moreover, since the problem with the directivity is improved while using the LED as in the conventional case, the advantages of the LED, such as power saving and long life, can be continuously utilized.

  In addition, unlike the example of FIG. 2, the planar light emitter is formed by arranging a plurality of rectangular columnar light guide columns having a rectangular cross section, and one LED is provided at the end of each light guide column. Also good. In this case, a gap that does not emit light may be generated between the light guide pillars. However, as will be described later, light from the planar light emitter passes through a light passage hole of a light passage reflector disposed on the light emitter and stores the light. Since it is inject | emitted on the material side, it is desirable to arrange | position so that this clearance gap and a light passage hole may not overlap up and down.

  Furthermore, the planar light emitter may be provided with an EL (Electro-Luminescence) sheet, for example, in addition to the LED light source and the light guide plate as described above.

(Light passing reflector)
The light-transmitting reflecting material has a light-transmitting hole arranged in a planar shape for allowing light emitted from the planar light-emitting body to pass through, with the back surface facing the planar light-emitting body and the front surface functioning as a light reflecting surface. Have. As such a light transmission reflection material, for example, a surface of a sheet-like resin coated with titanium oxide or zinc oxide can be considered. In particular, titanium oxide is a material suitable as a reflector.

  FIG. 3 shows an example of the shape and configuration of the light passing reflector. Although (a) is a top view and showed one part shape, the shape of another part is also the same. (B) is a figure which shows a part of XX sectional view of (a). In the example of this figure, the light-transmitting reflecting material 0320 includes a plurality of light-passing holes 0322 in the sheet-like member 0321, and a reflecting material 0323 is applied to the surface of the sheet-like member (excluding the light-passing holes). Thus, a reflective layer is formed. In (b), the portion indicated by the diagonal line rising to the left is the cross section of the sheet-like member, and the part indicated by the diagonal line rising to the right is the cross section of the reflective layer. The reflective layer may be formed by attaching a reflective sheet.

  The size of the light passage hole is limited to the extent that it has a sufficient size to allow all the light to pass to the phosphorescent material side and does not impair the function of the reflective surface formed on the surface of the light passage reflector. It is designed appropriately so that it becomes the specified size. As an example of such dimensions, when the light-transmitting reflecting material has dimensions of about 100 mm in length, about 300 mm in width, and about 0.2 mm in height, the pitch is 1.6 mm and the hole diameter is 1.1 mm. Can be considered. In this case, about 60 light passage holes and about 180 light passage holes are arranged in the light passage reflector. What is shown in this figure is also an example in which the light passage hole has such a dimension.

  The light-transmitting reflecting material may be disposed away from the planar light emitter by providing a space between the planar light emitter and may be disposed in contact with the planar light emitter. As an example of the latter, a sheet-like light-transmitting reflective material may be attached to the surface of the planar light emitter. From the viewpoint of reducing the size of the phosphorescent structure, which is a feature of the present invention, it is desirable not to provide a space between the planar light emitter and the light transmission reflector, and the upper surface of the planar light emitter. The sheet-like thing which has elasticity so that it can affix according to a shape is suitable.

(Phosphorescent material)
The phosphorescent material is a planar member that accumulates light emitted from the planar light emitter through the light passage hole or reflected by the light reflecting surface. That is, phosphorescence in the phosphorescent material is performed by light that is emitted from the planar light emitter through the light passage hole and reaches the phosphorescent material directly. The other is performed by the light emitted from the back surface of the phosphorescent material, reflected by the light reflecting surface of the light transmitting reflector, and reaching the phosphorescent material again. The light stored in the phosphorescent material is emitted from the surface side, which is the light emitting surface of the phosphorescent material, and functions as a phosphorescent marker or the like.

As the phosphorescent material, a strontium aluminate phosphorescent powder dissolved in a solution and dried is used. Strontium aluminate is a substance containing strontium (Sr), aluminum (Al), and oxygen (O) as main constituent elements such as SrAl ₂ O ₄ , Sr ₄ Al ₁₄ O _25, and strontium aluminate phosphorescent powder. Is obtained by adding a small amount of europium (Eu), dysprosium (Dy), boron (B) or the like using strontium aluminate salt as a mother crystal.
Moreover, you may use a silicone-type raw material as a luminous material. Silicone materials are superior in stability to ultraviolet rays and the like compared to resin materials because of the large binding energy of the siloxane bond, which is the main skeleton, and therefore have the characteristics of less discoloration and deterioration due to ultraviolet rays. doing. For this reason, the use of the phosphorescent material of the phosphorescent structure according to the present invention, which is often used outdoors, can prevent discoloration and deterioration of the phosphorescent material due to ultraviolet rays.

  By the way, when the phosphorescent material is irradiated and phosphorescent is performed, light is also emitted from the rear surface side of the phosphorescent material as described above, but this light contributes to light emission for functioning as a phosphorescent marker or the like. And it can be wasted. However, in this embodiment, since the surface of the light passing reflecting material provided on the lower surface side of the phosphorescent material is configured to function as a light reflecting surface, it is emitted from the rear surface of the phosphorescent material and is applied to the surface of the light passing reflecting material. The reached light is reflected and scattered by the light reflecting surface disposed on the surface, reaches the phosphorescent material again, and can be used for phosphorescence. In this way, light emitted from the back surface of the phosphorescent material can be used for phosphorescence without waste.

  For this purpose, it is necessary to provide a space between the light passing reflector and the phosphorescent material so that light emitted from the phosphorescent material is reflected by the light passing reflector and is repeatedly reflected and scattered. Cannot be placed in contact with each other like a light-transmitting reflector. However, in the present embodiment, unlike the conventional configuration, the light source is configured to emit light, and the entire surface of the phosphorescent material can be irradiated with light at a short distance from the light source. The space can be made compact. How compact this space can be made is regulated by the size and number of light passage holes. For example, the light passage holes have a pitch of 1.6 mm and a hole diameter of 1.1 mm. In the case where about 60 vertical x 180 horizontal passage holes are arranged on a light passing reflector having a length of about 100 mm × width of about 300 mm × height of about 0.2 mm, the distance between the phosphorescent material and the light passage reflector is 5 to 5 mm. It can be about 10 mm.

(Configuration for irradiating phosphorescent material with light from a planar light emitter without waste)
By the way, the light emitted from the surface of the planar illuminator where the light passage hole of the light passage reflector is located on the upper surface is emitted to the side where the phosphorescent material is disposed through the light passage hole. However, light cannot be emitted from other surfaces because the upper surface is covered by the back surface of the light-transmitting reflecting material. At this time, if the light is absorbed by the back surface, the light is not used for storing light and is wasted. Therefore, it is desirable that the light passing reflecting material is configured so that the back surface also functions as a light reflecting surface. If comprised in this way, the light which hit the said back surface will be reflected and will return in a planar light-emitting body, for example, will be light-guided in the whole light-guide plate, diffusely reflecting in a light-guide plate again as mentioned above, and the side surface of a light-guide plate Is injected to the surface side. Therefore, by repeating this process, almost all of the light can be passed through the light passage hole of the light passage reflecting material and used for light storage.

(Graphic layer, transparent protective layer)
(Graphic layer)
The phosphorescent structure of the present embodiment may have a graphic layer for raising the pattern with the light from the phosphorescent material on the upper surface of the phosphorescent material. In order to form the graphic layer, for example, a green opaque paint may be applied or printed on the surface of the phosphorescent material. Alternatively, an opaque sheet may be attached to the surface of the phosphorescent material.

(Transparent protective layer)
The phosphorescent structure of the present embodiment may have a transparent protective layer for protecting the phosphorescent material from dirt and damage on the upper surface of the phosphorescent material. As a material for the transparent protective layer, for example, transparent glass or transparent resin (transparent acrylic resin, transparent polycarbonate resin, etc.) is used. The transparent protective layer also plays a role of increasing the light emission luminance of the phosphorescent material by emitting light emitted from the phosphorescent material while irregularly reflecting the light within the layer. Furthermore, when the graphic layer is disposed on the upper surface of the phosphorescent material, the transparent protective layer is disposed on the upper surface of the graphic layer. In this case, the transparent protective layer also serves to protect the graphic layer.
(Example of shape of phosphorescent structure including graphic layer and transparent protective layer)
FIG. 4 shows an outline of the configuration of the phosphorescent structure 0400 including the graphic layer 0450 (shown in black) and the transparent protective layer 0460. The remaining configuration is the same as that shown in FIG.

(Specific example using the phosphorescent structure of this example: road signs)
Since the phosphorescent structure of the present embodiment can be made compact by the above configuration, it can be arranged in a narrow space such as a road surface or a wall surface, such as a road sign, an evacuation guide sign, etc. It can be used for various purposes.

  FIG. 5 is an example of the shape of a road sign using the phosphorescent structure of the present embodiment. The road sign 0500 shown in this figure is installed on the road surface 0501 and is entirely embedded in the road. Since the entire sign can be reduced in thickness (for example, about 10 to 15 mm), it can be installed even when the road cannot be dug deeply in relation to other underground reserves.

(Specific example using the phosphorescent structure of this example: evacuation guidance sign)
FIG. 6 is an example of the shape of the evacuation guidance sign using the phosphorescent structure of the present embodiment. The evacuation guidance sign 0600 shown in this figure is installed on the wall surface 0601 and is entirely exposed outside the wall surface. Since the thickness of the entire sign can be reduced, even if the entire sign is exposed in this way, it is possible not to obstruct traffic. Of course, like the example of the road sign shown in FIG.

<Effect>
By using the surface light source as the light source according to the invention of the present embodiment, it is possible to irradiate the entire surface of the phosphorescent material disposed at a close distance from the light source. For this reason, the size of the phosphorescent structure that can be made to emit light with high brightness using a reflective material is made more compact, and thus it is easier to arrange the phosphorescent structure in a narrow space such as a road surface or a wall surface. Can be provided.

<Overview>
The phosphorescent structure of the present embodiment has a diffuser plate between the phosphorescent material and the light transmission reflecting material.

<Configuration>
The phosphorescent structure of the present embodiment is basically in common with the phosphorescent structure of the first embodiment. However, the phosphorescent structure of the present embodiment has a diffuser plate between the phosphorescent material and the light transmission reflecting material. The diffusion plate is for diffusing light from the light passage hole. The purpose of diffusing light is to prevent the directivity of light emitted from the planar light emitter and emitted through the light passage hole of the light reflecting passage material. That is, the light emitted from the planar light emitting body and emitted through the light passage hole of the light reflecting passage material has lower directivity than the case where the LED light is directly emitted as in the conventional case, and the light storage material It is easy to irradiate the entire surface. However, even if the thickness of the phosphorescent structure is made very small and the space between the light reflecting passage material and the phosphorescent material is extremely narrow, the light passing through the light passage hole is not irradiated on the entire surface of the phosphorescent material. Cases can arise. Therefore, by further disposing a diffuser plate between the phosphorescent material and the light-transmitting reflecting material, it is possible to further diffuse the light from the light passage hole toward the phosphorescent material. The distance can be further shortened, which can contribute to further compactness of the phosphorescent structure.

  Examples of the diffusion plate include a frost type diffusion plate whose surface is ground glass (sand surface), a corrosive type diffusion plate whose surface is ground glass and then smoothed by corroding the surface with hydrogen fluoride, or the surface. An opal diffusion plate coated with a milky white film can be used. In this case, in order not to waste as much light as possible for storing light, it is necessary to use a diffusion plate having a certain degree of transmittance. Generally, if the transmittance is increased, the diffusion rate deteriorates. Whether to use a material having a diffusivity is appropriately selected in consideration of the size of the phosphorescent structure, the size of the light passage hole, and the like. In general, the frost type diffusion plate is excellent in diffusibility, and the corrosion type diffusion plate is excellent in permeability. Moreover, the transmittance of the opal diffuser is constant regardless of the thickness.

  The diffusing plate may be disposed away from the light-transmitting reflecting material in a form providing a space between the light-transmitting reflecting material, but may be disposed so as to be in contact with the light-transmitting reflecting material. From the viewpoint of making the size of the phosphorescent structure more compact, which is a feature of the present invention, it is desirable not to provide a space between the light transmission reflector and the diffusion plate. As described above, since the space between the planar light emitter and the light transmission reflector is preferably disposed without providing a space, in this case, the light transmission reflector is disposed in contact with the upper surface of the planar light emitter. In addition, the diffusion plate is disposed in contact with the upper surface thereof.

  Although different from the present embodiment, a concave lens made of transparent glass or transparent resin may be arranged in place of the diffusion plate. Also by this, even if the distance between the planar light emitter and the phosphorescent material is short, it is possible to achieve the same purpose of allowing the light from the planar phosphor to reach the entire surface of the phosphorescent material.

(Example of dimensions of light passage hole and diffuser thickness)
As for the dimensions of the light passage hole and the diffusion plate, for example, the light passage hole is 1 mm to 3 mm, the hole diameter is 0.5 mm to 1.5 mm, and the thickness of the diffusion plate is preferably 3 mm to 5 mm. By adopting such dimensions, it is possible to suitably realize that all the light is allowed to pass to the phosphorescent material side and that the function of the reflecting surface formed on the surface of the light transmitting reflecting material is not impaired. it can. An example of the shape of the light passage hole and the diffusion plate having the dimensions according to FIG. 7 is shown in a sectional view. This example is a preferred example in which the light passage holes 0722 have a pitch of 1.6 mm, a hole diameter of 1.1 mm, and the diffusion plate 0770 has a thickness of 3 mm.

<Effect>
According to the invention of the present embodiment, the object of the present invention, which allows the light from the planar light emitter to reach the entire surface of the phosphorescent material even when the distance between the planar phosphor and the phosphorescent material is short, is more suitably realized. It becomes possible to do.

<Overview>
In the phosphorescent structure of this example, the light is UV light.

<Configuration>
(General)
The phosphorescent structure of the present embodiment is basically in common with the phosphorescent structure of the first or second embodiment. However, in the phosphorescent structure of the present embodiment, the light emitted from the planar light emitter is UV light. Since UV light has a low vibration frequency, it is possible to obtain light emission with sufficient brightness to irradiate the phosphorescent material with less power consumption. In addition, since UV has a feature such as a bactericidal action and does not emit heat, it is possible to sterilize the surface of the phosphorescent phosphor to be irradiated and prevent high temperature.

(Planar light emitter)
In this case, a UV light source is used as the light source of the planar light emitter. For example, when the planar light-emitting body includes a light guide plate and a light source provided at an end portion of the light guide plate as illustrated in FIG. 2, a UVLED is provided as a light source at the end portion of the light guide plate. In this case, the gel may be filled in the case that houses the UVLED. In that case, it is desirable to use an inorganic gel having UV weather resistance. This is because UV is easily absorbed, and the absorbed UV light energy is likely to break the chain structure of the organic gel and deteriorate the gel.

(Light passing reflector)
Since the light passing reflector is directly irradiated with light from the light source, in this embodiment using UV light, it is desirable that the light passing reflector (especially the back surface) is also weather resistant to UV. Further, it is desirable that the reflective material is white. An example of such a light-transmitting reflecting material having UV weather resistance is Scotchcal (registered trademark) film (JS1000 series non-transparent type) manufactured by Sumitomo 3M Limited.

(Diffusion plate)
When a diffusion plate is provided on the surface side of the light transmission reflecting material, the diffusion plate needs to have a property of transmitting UV. For example, quartz glass is used as a material having such UV transparency. In addition, calcium fluoride resin, magnesium fluoride resin, and the like can also be used. As the type of the diffusion plate, a corrosive type or a frost type has a high diffusion effect on UV, and can be used in this embodiment.

<Effect>
According to the invention of this embodiment, it is possible to obtain light emission with sufficient brightness to irradiate the phosphorescent material with less power consumption by using UV light.

<Overview>
The phosphorescent structure of the present embodiment has a mechanism for intermittently emitting light.

<Configuration>
(General)
The phosphorescent structure of the present embodiment is basically in common with the phosphorescent structures of the first to third embodiments. However, the phosphorescent structure of the present embodiment has an intermittent mechanism for intermittently emitting light.
The purpose of providing the intermittent mechanism is to save power consumption for light emission of the light source by repeating the process of causing the phosphorescent structure to emit light for a long time by emitting light for a short time.

As a specific configuration of the intermittent mechanism, for example, a light source is provided that includes a microcomputer, emits light for a predetermined time using its timing function and control function, stops emitting light for a predetermined time, and then repeats the same processing. It is conceivable to control the light emission pattern.
As an example of such a light emission pattern, it is conceivable to emit light for 15 seconds, stop the light emission for 15 minutes, and then repeat the same pattern.

<Effect>
According to the invention of this embodiment, it is possible to save power consumption for light emission of the light source by repeating the process of causing the phosphorescent structure to emit light for a long time by emitting light for a short time.

Claims (9)

A planar light emitter that emits light in a planar manner;
A light-passing reflective material having a light-passing hole arranged in a planar shape that passes the light from the planar light-emitting body, with the back surface facing the planar light-emitting body, and the surface functions as a light reflecting surface;
A surface-shaped phosphorescent material that accumulates light by passing through the light passage hole or reflected by the light reflecting surface;
A phosphorescent structure consisting of The planar light emitter includes a light source disposed at a surface end, a light guide plate that guides light from the light source,
The phosphorescent structure according to claim 1, comprising:   The phosphorescent structure according to claim 1 or 2, further comprising a diffusing plate for diffusing light from the light passage hole between the phosphorescent material and the light transmission reflecting material.   The phosphorescent structure according to any one of claims 1 to 3, wherein the light is UV light.   The phosphorescent structure according to any one of claims 1 to 4, further comprising a graphic layer for raising a pattern with light from the phosphorescent material on an upper surface of the phosphorescent material.   The phosphorescent structure according to claim 1, further comprising an intermittent mechanism for intermittently emitting the light.   The light passage hole has a pitch of 1 mm to 3 mm, a hole diameter of 0.5 mm to 1.5 mm, and a thickness of the diffuser plate of 3 mm to 5 mm. A phosphorescent structure according to 1.   A road sign using the phosphorescent structure according to any one of claims 1 to 7.   An evacuation guidance sign using the phosphorescent structure according to any one of claims 1 to 7.

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