JP3078564U - information - Google Patents

Abstract

(57) [Summary] An object of the present invention is to provide a guide plate which performs multicolor and clear printing using an oxide-based phosphorescent material. Kind Code: A1 Abstract: A phosphor that emits visible light by an oxide-based phosphorescent material and excitation light on a surface or a back surface of a base made of an acrylic plate, a wooden plate, a non-ferrous metal plate, a glass plate, or a rubber plate. A luminous layer composed of a body was formed. On the upper part, predetermined guidance display contents such as a guide plate indicating an emergency exit used in hospitals and the like and a non-emergency evacuation route were printed by one of silk printing, ink jet printing, and cut sheet printing.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a configuration of a guide plate for performing display using an oxide phosphorescent material.

[0002]

[Prior art]

 Conventionally, a sulfide-based phosphorescent material has been used for a guide plate using a phosphorescent material. Sulfide-based phosphorescent materials are copper sulfides added with copper, and have been widely used, but have problems such as insufficient afterglow time and afterglow luminance. An oxide phosphorescent material developed as a substitute for this was a material in which a rare earth element such as eurobium, desprodium, neodymium or the like was added to a host crystal composed of an alkaline earth aluminate. Eurobium acted as an activator, rare earth elements such as desprodium and neodymium acted as an activator, and oxide phosphorescent materials had excellent properties not found in sulfide phosphorescent materials. That is, chemical stability, light resistance, long-term afterglow characteristics and the like. Therefore, the guide plate using the oxide-based phosphorescent material inherits the above-described characteristics, and a long-time clear light-emitting display has been made possible. More specifically, the visible afterglow time in a dark place is about 1 to 2 hours in the case of the sulfide phosphorescent material, whereas it is 8 to 10 hours in the case of the oxide phosphorescent material.

[0003] Although the oxide-based phosphorescent material has excellent characteristics as described above, there are problems in the points described below. In other words, there is a problem in that since only a single color of light yellow green can be obtained with respect to the emission color, multicolor display cannot be performed. In addition, there was a problem with the printing technology on the guide plate that it was not easy to print on a three-dimensional object or clear printing.

[0004]

[Problems to be solved by the invention]

 The present invention has been made in view of the above prior art, and has as its object to provide a guide plate that performs multicolor and clear printing using an oxide-based phosphorescent material.

[0005]

[Means for Solving the Problems]

 According to the invention of claim 1, a phosphorescent layer composed of an oxide phosphorescent material and a phosphor that emits visible light by excitation light is formed on the front or back surface of the base material, and a predetermined guide is formed. By printing the display content, the guide display content can be visually recognized for a relatively long time in a dark place.

According to the present invention, a phosphorescent layer composed of an oxide phosphorescent material and a phosphor that emits visible light by excitation light is formed on the front or back surface of a substrate, and predetermined guide display contents are printed. By doing so, it is possible to provide a guide plate in which the guide display contents can be visually recognized for a relatively long time in a dark place.

[0007] The invention according to claim 2 is characterized in that, in claim 1, the guide display content is printed by any one of silk printing, ink jet printing, and cut sheet printing.

[0008] The present invention makes it possible to provide a guide plate with a clear printed display by printing the guide display content by any one of silk printing, ink jet printing, and cut sheet printing. Things.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the guide plate is a guide plate indicating an emergency exit used in an underground shopping mall, a hospital, or the like, or a guide plate indicating an emergency evacuation route. I do.

[0010] The present invention provides a guide plate indicating an emergency exit or a guide plate indicating an emergency evacuation route used in an underground shopping mall, a hospital, or the like, which can be visually recognized for a relatively long time. is there.

The invention according to a fourth aspect is characterized in that, in any one of the first to third aspects, the base material is formed of any one of an acrylic plate, a wooden plate, a non-ferrous metal plate, a glass plate, and a rubber plate.

In the present invention, the base material is formed of any one of an acrylic plate, a wooden plate, a non-ferrous metal plate, a glass plate, and a rubber plate, and provides various guide plates according to the characteristics of each material. Things.

[0013]

[Embodiment of the invention]

 A substrate composed of an acrylic plate, a wooden plate, a non-ferrous metal plate, a glass plate, or a rubber plate, composed of an oxide phosphorescent material on the front or back surface of the substrate and a phosphor that emits visible light by excitation light The light-storing layer to be formed was formed, and predetermined guidance display contents were printed. The printing was performed by any one of silk printing, ink jet printing, and cut sheet printing, and the display contents displayed a guide board indicating an emergency exit used in hospitals and the like and a slogan in an emergency. Thus, it is possible to provide a guide plate that not only allows the display contents to be clearly recognized in a dark place for a relatively long time, but also provides multicolor and clear display.

[0014]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 show the configuration of the first embodiment according to the present invention. FIG. 1 shows its appearance, and FIG. 2 shows its cross-sectional structure. An acrylic resin plate of about 300 × 400 × 5 mm was used for the base material 1a. The display content (display layer) 1b was printed in black on the back surface of the base material by ink jet, and then the luminous layer 1c was formed on the display layer 1c. The phosphorescent layer was formed by uniformly coating an oxide phosphorescent material and a phosphor that emits visible light by excitation light in a transparent binder. As the oxide-based phosphorescent material, a phosphorescent material which is white under sunlight and has a pale yellow-green afterglow in a dark place is used, and a phosphor which emits visible light by excitation light is used. Those having a pale blue color under sunlight were used. An adhesive layer 1d was formed on the luminous layer 1c using an acrylic ester resin-based adhesive, and a protective paper 1e for protecting the adhesive layer 1d was provided to obtain an adhesive display panel. As a result, the obtained guide plate was in a state in which black letters were displayed on a light blue background under white light, and a portion that was a light blue background in a dark place emitted deep green light. This is considered to be due to the mixing of the pale yellowish green color, which is the afterglow color of the oxide phosphorescent material, and the pale blue coloration of the phosphor that emits visible light by excitation light. With such a configuration, the present invention makes it possible to provide a multicolored and clearly printed guide plate.

Next, an evaluation test performed to know the afterglow characteristic of the guide plate according to the present invention will be described. As a measurement specimen, a phosphorescent guide plate shown in FIGS. 1 and 2 and a conventional product of another company as a comparison were prepared. Each sample was stored in a dark place in advance to remove afterglow in accordance with the JIS standard JISZ9107 for safety sign boards, and irradiated for 20 minutes under the illuminance of a 200 lux D65 light source. The strength was measured.

FIG. 3 and Table 1 below show the results. In the conventional products of other companies, the afterglow intensity decreases to approximately 0 after 30 minutes of elapsed time, while the guide plate according to the present invention still has an afterglow intensity of about 10 lx after 100 minutes of elapsed time. In the guide plate according to the present invention, a relatively rapid decrease in the intensity of the afterglow is observed for about 35 minutes from the start of the test, but thereafter, the intensity of the intensity is about 10 lx for a while. The constant afterglow continued to emit stably. According to the visual confirmation, the nearby object can be visually recognized by the light emitted from the guide plate according to the present invention for 1 to 2 hours after the start of the experiment, and the guide plate itself can be visually recognized for 6 to 8 hours. became. This shows that a clear lighting effect can be maintained all night long by irradiating the illumination light for about 10 minutes every 1 to 2 hours, which is effective as an energy saving measure.

The present invention provides a guide plate configured as described above and capable of clearly recognizing the display content for a relatively long time in a dark place. In the examples, the acrylic resin plate was used as the base material. However, the material is not limited to this, and the same effect can be obtained even if another material is used as long as it is a transparent resin or glass material. obtain. The display contents may be other than the ink jet printing, and include, for example, a method using silk printing, cut sheet printing, or the like. By appropriately selecting the combination of the material and the printing method, the guide plate according to the present invention can be various. In other words, if printing by inkjet, it is possible to print on various materials such as a wooden plate, a non-ferrous metal plate, a glass plate, and a rubber plate in addition to an acrylic plate, and it can also be used for uneven wooden products. is there.

Hereinafter, a second embodiment according to the present invention will be described. 4 and 5 show the configuration of the second embodiment according to the present invention. FIG. 4 shows its appearance, and FIG. 5 shows its cross-sectional structure. This embodiment is an application of the first embodiment and includes a configuration common to the first embodiment. Therefore, description of common parts will be omitted, and only different points will be described. In the first embodiment, a transparent material is used as the base material. In the second embodiment according to the present invention, an opaque material (wood board) is used as the base material. A wooden board of about 300 × 400 × 5 mm was used as the base material 1a. After forming the luminous layer 1c on the substrate 1a, the display content (display layer) 1b was printed in black by inkjet. On top of this, a top coat (protective layer) 1f was formed using an inorganic (ceramic) coating agent. An adhesive layer 1d was formed on the opposite surface of the substrate, and a protective paper 1e for protecting the adhesive layer 1d was provided. In order to make use of the grain of the base material 1a, the phosphorescent layer 1c was added with a small amount of an oxide phosphorescent material and a phosphor that emits visible light by excitation light, thereby ensuring transparency. The following can be selected as the top coat (protective layer) 1f according to the application. That is, it can be formed by any of a ceramic coating agent such as an aqueous silicate ceramic coating agent and an alkoxysilane ceramic coating agent, and a water repellent coating agent. The protective layer protects the display surface displayed by inkjet printing, and provides weather resistance, stain resistance, water repellency, and the like. As a result, under the white light, the obtained guide board was in a state in which black letters were displayed on a light blue background with wood grain, and in a dark place, the light blue background became a deep green emission color. The second embodiment is configured as described above, and the configuration of each layer other than the luminous layer 1c and the top coat (protection layer) 1f is the same as that of the first embodiment. In this embodiment, the amount of addition of the oxide-based phosphorescent material and the phosphor that emits visible light by the excitation light was reduced in order to represent the grain of the base material. As a result, the afterglow luminance was slightly reduced, but the texture of the wood was sufficiently expressed. With this configuration, when an opaque base material is used, a guide plate capable of expressing the texture of the base material is provided.

Next, the relationship between the illuminance of the excitation light and the luminance of the afterglow in the first and second embodiments will be described. FIG. 6 shows the afterglow luminance obtained by irradiating the guide plates according to the first and second embodiments and the conventional product of another company with light of 0 to 1000 lx, respectively. It was found that the afterglow luminance increased as the illuminance of the excitation light increased. In addition, comparison with products of other companies showed the superiority of the guide plate according to the present invention.

Next, the relationship between the excitation time and the afterglow luminance in the present invention will be described. FIG. 7 shows the relationship between the excitation time and the afterglow luminance when the guide plate according to the present invention and the conventional product of another company are excited under the illumination of 200 lx for a predetermined time. In the guide plate according to the present invention, while the irradiation time of the excitation light is between 20 and 30 minutes, a remarkable increase in the afterglow luminance is seen with time, and in order to obtain the saturation luminance, the afterglow luminance is 20 to 3 times. It was found that light irradiation for about 0 minutes was necessary. On the other hand, the conventional product obtains the saturation luminance in a few minutes, but the intensity of the afterglow luminance itself is weak, and thus, the superiority of the phosphorescent sheet according to the present invention is also shown in this regard. Table 2 below shows the approximate irradiation time required for the guide plate according to the present invention to obtain the saturation luminance for each irradiation light source.

The embodiment according to the present invention is as described above. In both the first and second embodiments, an oxide-based phosphorescent material added to the phosphorescent layer and a phosphor that emits visible light by excitation light are used. It is possible to select a combination of colors by appropriately selecting the combination, and this combination is not limited to the embodiment.

[0022]

[Effect of the invention]

 The present invention is implemented in the form described above, and has the following effects.

According to the present invention, a phosphorescent layer composed of an oxide phosphorescent material and a phosphor that emits visible light by excitation light is formed on the front or back surface of a base material, so that the phosphorescent layer can be relatively dark. In addition to being able to visually recognize the guidance display contents for a long time, it is possible to provide a guidance board that performs multicolor and clear display.

[0024]

[Brief description of the drawings]

FIG. 1 is a diagram showing an appearance of a first embodiment.

FIG. 2 is a sectional view showing a sectional structure of the first embodiment.

FIG. 3 is a graph showing a result of an afterglow characteristic evaluation test according to the first example.

FIG. 4 is a view showing an appearance of a second embodiment.

FIG. 5 is a sectional view showing a sectional structure of a second embodiment.

FIG. 6 is a graph showing a result of determining a relationship between excitation light luminance and afterglow luminance according to the first example.

FIG. 7 is a graph illustrating a result of measuring a relationship between an excitation time and a persistence luminance of the guide plate according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 1a Support (substrate) 1b Display content (display layer) 1c Luminescent layer 1d Adhesive layer 1e Protective paper 1f Top coat (protective layer)

Claims (4)

[Utility model registration claims] 1. An oxide phosphorescent material on the front or back surface of a substrate,
By forming a phosphorescent layer composed of a phosphor that emits visible light by excitation light and printing predetermined guide display contents, the guide display contents are visually recognized for a relatively long time in a dark place. A guide plate characterized by being able to do so. 2. The guide plate according to claim 1, wherein said guide display content is printed by any one of silk printing, ink jet printing, and cut sheet printing. 3. A guide plate according to claim 1, wherein said guide plate is a guide plate indicating an emergency exit used in an underground mall or a hospital or a guide plate indicating an emergency evacuation route. 4. A guide plate according to claim 1, wherein said base material is made of any one of an acrylic plate, a wooden plate, a non-ferrous metal plate, a glass plate, and a rubber plate.