JP2008180989A - Internally illuminated sign - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an internally illuminated sign having high durability relating to persistence of light and capable of economically keeping persistence of internally illuminating light even upon sudden electricity failure. <P>SOLUTION: The sign has a phosphorescent plate 1 disposed in the front side of a surface light emitting body 2, which allows persistence of internal illumination light even upon sudden electricity failure. The phosphorescent plate 1 is formed by compounding a phosphorescent material, and thereby preventing deterioration of the phosphorescent material to improve the durability relating to the persistence of light. Since the phosphorescent material has only to be compounded in the phosphorescent plate 1, economical superiority is achieved. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an internally illuminated sign that can retain internally illuminated light even in the event of a sudden power failure.

  As a sign that can retain the light to be internally lit even at the time of a sudden power failure, for example, a base material, a luminous paint layer provided on the base material, and a phosphorescent paint layer provided on the luminous paint layer are provided. In addition, a labeling device including a light-transmitting colored base material layer in which a sublimation coloring material enters and a label is formed is disclosed (for example, Patent Document 1).

  Further, as a planar light source used for an internally illuminated sign, for example, a light source, a light guide plate optically connected to the light source and emitting light from the light source from one surface thereof, and the other surface of the light guide plate The planar light source which consists of the arrange | positioned reflective film WHEREIN: The said light guide plate is disclosing the planar light source which consists of the material which mixed the luminous material in the transparent material (for example, patent document 2).

Japanese Patent Laid-Open No. 10-247065 JP 2000-284280 A

  However, in the conventional sign as described in Patent Document 1, since the light is stored using the phosphorescent paint layer, it is expected that the phosphorescent material in the paint layer is deteriorated early, especially outdoors. It was difficult to endure when used in the above. In addition, the color tone unique to the phosphorescent material may hinder the development of a desired color tone related to the display content.

  Moreover, in the planar light source used for the conventional internally-illuminated sign as described in Patent Document 2, it is necessary to mix and mold the phosphorescent material necessary for the entire light guide plate, while obtaining a desired light emission luminance. It required too much amount of phosphorescent material and was economically difficult. In addition, the light emitted here also has a color tone peculiar to the phosphorescent material, which may hinder the expression of the desired color tone.

  The present invention has been made in view of the above-described problems, and is an internally illuminated sign that has high durability related to the persistence of light and is capable of remaining light for internal illumination even in the event of a sudden power failure economically. Is intended to provide.

  In order to achieve the above object, the present invention is configured as follows. That is, the internally illuminated sign according to the present invention includes a display unit and a surface light emitter provided on the back surface of the display unit, and is molded by blending a phosphorescent material with a synthetic resin on the display unit side of the surface light emitter. The phosphorescent plate is provided, and the size of the phosphorescent plate is approximately the same as the light emitting surface of the surface light emitter.

  According to the internally illuminated sign according to the present invention, the light to be internally lit remains even during a sudden power outage or the like by the luminous plate, but the luminous plate is molded with a luminous material, Deterioration of the phosphorescent material is prevented, and durability related to the remaining of light is enhanced. Moreover, since a phosphorescent material should just be mix | blended only with a luminous plate, it can be made economically excellent.

  In addition, if the display unit is provided at a distance from the phosphorescent plate, the unique color tone of the phosphorescent material contained in the phosphorescent plate is reduced when the surface light emitter emits light due to diffused light from the surroundings. Therefore, it is preferable that the color tone of emitted light can be made natural.

  According to the internally illuminated sign according to the present invention, the light to be internally lit remains even during a sudden power outage or the like by the luminous plate, but the luminous plate is molded with a luminous material, Deterioration of the phosphorescent material is prevented, and durability related to the remaining of light is enhanced. Moreover, since a phosphorescent material should just be mix | blended only with a luminous plate, it can be made economically excellent.

  BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment according to the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing an embodiment of an internally illuminated sign according to the present invention. The surface light emitter 2 is disposed behind the display unit 3, and the phosphorescent plate 1 is disposed on the display unit 3 side of the surface light emitter 2. The surface light emitter 2 is of a light guide plate type in which light enters the light guide plate 21 from the side edge of the light guide plate 21. In this embodiment, light emitted from the light emitter 22 which is a light emitting diode is used. The light diffusing layer 23 is provided behind the light guide plate 21 by white screen printing.

  The light guide plate 21 and the phosphorescent plate 1 are provided in close contact with each other, and the light L1 emitted from the surface light emitter 2 is absorbed by the phosphorescent material contained in the phosphorescent plate 1 without loss. It is made like that. When the surface light emitter 2 stops emitting light due to a sudden power failure or the like, the light emitted from the phosphorescent plate 1 remains, but the light guide plate 21 is transparent and the light diffusion layer 23 is provided behind. As a result, the light L2 emitted from the phosphorescent plate 1 toward the back passes through the light guide plate 21 and is reflected by the light diffusion layer 23 to become reflected light L3, thereby increasing the luminance of the remaining light. It is made like that.

  Further, a gap K is provided between the luminous plate 1 and the display unit 3. Light that has leaked to the surroundings from the surface light emitter 2 due to such an interval, or scattered light that is generated by reflection of light within the internally illuminated sign 10 is mixed in the light that passes through the phosphorescent plate 1 and travels toward the display unit 3. Then, the color tone peculiar to the phosphorescent material contained in the phosphorescent plate 1 is relaxed, and the possibility of hindering the expression of the desired color tone displayed by the display unit 3 is reduced. If the interval K is too large, the internally illuminated sign 10 may be increased in size, or the light emission luminance may be lowered. Therefore, the interval K is preferably set to about 10 to 50 mm.

  FIG. 2 is an explanatory view showing an example of a method for forming an internally illuminated sign according to the present invention. The internally illuminated sign 10 is accommodated by inserting the phosphorescent plate 1 and the surface light emitter 2 integrated from the opening 41 into the sign frame 4 having the opening 41 on the front surface. It is formed by attaching the display unit 3 so as to cover the opening 41 of the body 4.

  The synthetic resin material used to form the phosphorescent plate 1 is not particularly limited as long as it is translucent, but is preferably highly transparent, such as polycarbonate, polyethylene terephthalate, polybutylene terephthalate. Polyphenylene sulfide, polyamide, polymethacrylate, acrylic resin and the like can be suitably used. Among these, an acrylic resin that has high moldability in addition to transparency is most preferable.

  Further, as the phosphorescent material contained in the phosphorescent plate 1, a sulfide type material such as zinc sulfide or copper mixed with it may be used, but mainly an oxide such as aluminum oxide, boron oxide, strontium oxide or the like. In addition, an oxidation type compounded with rare earth such as Europume is preferable because of its advantages in safety, chemical stability, heat resistance, length of light emission time, and the like. In particular, aluminate-based strontium-based phosphorescent phosphors can be suitably used because of their long emission brightness and emission time. When the phosphorescent phosphor material is blended in an amount of about 10 to 20 parts by weight with respect to 100 parts by weight of the thermoplastic synthetic resin, sufficient luminous brightness can be obtained without adversely affecting the moldability. Further, if the phosphorescent plate 1 has a thickness of about 1 to 8 mm, the luminance of the remaining light can be secured without adversely affecting the color tone of the light emitted from the surface light emitter 2 and transmitted.

It is a longitudinal cross-sectional view which shows one Embodiment of the internally illuminated sign concerning this invention. It is explanatory drawing which shows an example of the formation method of the internally illuminated sign concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Phosphorescent plate 2 Surface light-emitting body 21 Light guide plate 22 Light-emitting body 3 Display part 10 Internal illumination type sign K space | interval

Claims (2)

A phosphorescent plate comprising a display unit and a surface light emitter provided behind the display unit, and a phosphorescent plate formed by blending a phosphorescent material with a synthetic resin is provided on the display unit side of the surface emitter, and the phosphorescent plate An internally illuminated sign, wherein the size of the light emitting surface is substantially the same as the light emitting surface of the surface light emitter. The internally illuminated sign according to claim 1, wherein the display unit is provided at a distance from the phosphorescent plate.

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