JPH1011001A - Decorative illumination sign - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative illumination sign capable of displaying desired parts distinctly and brightly than the other parts and brightly displaying the entire surface of an optical display screen as well. SOLUTION: Stressing dots 14 are formed in correspondence to the desired stressing parts of the front surface of a light reflection sheet 10 to be laid on the rear surface of a light transmission plate 20 and dots 12 are formed in correspondence to non-stressing parts. The desired stressing parts are thereby distinctly and brightly displayed on the optical display screen by the stressing dots 14 and the non-stressing parts are brightly displayed as well by the dots 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminated signboard which is an optical display device, and more particularly, to adjusting an amount of light so that only a desired portion corresponding to an information display portion can be changed to another portion. The present invention relates to an illuminated signboard that can be displayed more emphasized and brighter.

[0002]

2. Description of the Related Art A conventional illuminated signboard has a configuration as shown in FIG. 4 when it is intended to emphasize only a desired position of an image receiving body.

[0003] That is, according to FIG. 4, the internal structure of the illuminated signboard 3 is such that the light guide plate 20 for receiving the light of the light source 50 is disposed in parallel with a position in the same plane as the light source 50. A light diffusion sheet 30 is provided on the upper surface of the light plate 20. An image receiver 40 is disposed on the upper surface of the light diffusion sheet, and the image receiver 40 has a printed layer 7 on which desired information is printed.
It has 0. Here, the printing layer 70 of the image receiving body 40
The part that should be particularly emphasized among the parts (hereinafter, emphasized part 4
2), a light reflection sheet 60 having dots 62 at positions corresponding to the emphasized portions 42 is laid so that the dots 62 are in contact with the lower surface of the light guide plate 20 in the same shape and area as the emphasized portions 42. It had been.

[0004] In the illuminated signboard 3 having the above structure,
After the light is emitted from the light source 50 and enters from the side surface of the light guide plate 20, the light is repeatedly totally reflected inside the light guide plate 20.

Here, in a portion where the light reflecting sheet 60 is not laid on the lower surface of the light guide plate 20, since the dots are not in contact with the lower surface of the light guide plate 20, the light is repeatedly totally reflected on the inner surface of the light guide plate 20.

However, in the portion where the light reflecting sheet is laid on the lower surface of the light guide plate 20, the dots 62 are in contact with the lower surface of the light guide plate 20, so that the light inside the light guide plate 20 is directed toward the upper surface of the light guide plate 20 by the dots 62. Is reflected to

The light reflected by the dots 62 toward the light reflecting sheet 60 is reflected by the light reflecting sheet 60 onto the upper surface of the light guide plate 20.

In this manner, in the portion where the light reflecting sheet 60 is laid on the lower surface of the light guide plate 20, the light reflected to the upper surface of the light guide plate 20 by the dots 62 or the light reflective sheet 60 passes through the upper surface of the light guide plate 20. Then, the light diffused by the light diffusion sheet 30 disposed on the upper surface of the light guide plate 20 uniformly diffuses the light diffused toward the image receiving body 40 having the print layer 70 disposed on the upper surface of the light diffusion sheet 30. Supply.

At this time, since the light reflecting sheet 60 is laid on the lower surface of the light guide plate 20 so as to correspond to the position of the emphasized portion 42 formed on the print layer 70 of the image receiving body 40, only the emphasized portion 42 is provided. Thus, light with a small loss of luminance is supplied. The light was further transmitted through the image receiving body 40 and the printing layer 70 and guided to an optical display screen (not shown) provided on the upper surface of the image receiving body 40.

That is, in the above-described illuminated signboard 3, the light reflecting sheet 60 having the dots 62 is laid only on the lower surface portion of the light guide plate 20 corresponding to the position of the desired emphasized portion 42 of the print layer 70 on the upper surface of the image receiving body 40. By doing so, only the emphasized portion 42 is emphasized.

[0011]

However, in the illuminated signboard 3 having the above-described emphasized portion 42, the image receiving member 40
Light guide plate 20 corresponding to only the emphasized portion 42 of the printed layer 70 of FIG.
It is difficult to make the emphasized portion 42 stand out and brighter than the non-emphasized portion 44 even when the light reflecting sheet 60 having the dots 62 is laid on the lower surface of the light reflecting sheet 60.

There is also a problem that the brightness of the entire optical display screen of the illuminated signboard 3 is not improved.

Therefore, there has been a demand for an illuminated signboard capable of significantly improving the luminance of the emphasized portion 42 as compared with the non-emphasized portion 44 and further improving the brightness of the entire illuminated signboard.

[0014]

SUMMARY OF THE INVENTION An illuminated signboard according to the present invention has been made in view of the above problems.
It is an object of the present invention to provide an illuminated signboard in which the brightness of an emphasized portion can be remarkably improved as compared with a non-emphasized portion, and further, the brightness of the entire illuminated signboard can be improved.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An illuminated signboard of the present invention has a light guide plate disposed horizontally in the same plane as a light source, a light diffusion sheet disposed on an upper surface of the light guide plate, and A light reflection sheet laid on the lower surface of the light guide plate, wherein the upper surface of the light reflection sheet comprises a mixture of an adhesive and a reflective agent having high transparency corresponding to a desired emphasized portion. It is characterized in that an emphasis dot is formed.
Therefore, the luminance of the emphasized portion can be significantly improved as compared with the non-emphasized portion.

Further, in the electric signboard of the present invention, dots formed of a mixture of an adhesive and a reflective agent having high transparency corresponding to the non-emphasized portions are formed on the upper surface of the light reflecting sheet together with the above-mentioned emphasis dots. It is characterized by doing. Therefore, it is possible to improve the brightness of the emphasized portion where the brightness is remarkable, and to further improve the brightness of the entire illuminated signboard.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an embodiment of an illuminated signboard 1 according to the present invention, which is characterized in that a light reflecting sheet having an emphasis dot on one surface is used as its internal structure.

As for the structure, a film-shaped image receiver 40 having a print layer 70 on which a desired image is printed on the surface is provided, and a light source 50 is provided on the lower surface of the image receiver 40. . A light guide plate 20 for receiving light from the light source 50 is disposed in parallel with a position on the same plane as the light source 50, and a light reflection sheet 10 having an emphasis dot 14 is provided on a lower surface of the light guide plate 20. Is laid. A light diffusion sheet 3 is provided between the light guide plate 20 and the image receiving body 40.
0 are stacked.

Here, the emphasis dot 12 of the light reflection sheet 10 corresponds to the desired emphasis portion 4 of the image receiving body 40.
2 and is formed at a location corresponding to the emphasized portion 42.

Actually, when the above-described lighted signboard 1 is used, the light from the light source 50 is incident from the side of the light guide plate 20 and repeatedly reflected inside the light guide plate 20. The light is reflected to the upper surface of the light guide plate 20 by the emphasized dots 14 of the laid light reflection sheet 10. At this time, as shown in FIG.
Since light is formed on the entire surface corresponding to the emphasized portion 42 of 0, light can be supplied particularly to a position corresponding to the emphasized portion 42.

On the other hand, the light diffused by the emphasis dot 14 and transmitted to the lower surface of the emphasis dot 14 is further transmitted to the light reflection sheet 10.
Thus, the light is reflected to the upper surface of the light guide plate 20.

The light reflected on the upper surface of the light guide plate 20 by the highlighting dots 14 and the light reflection sheet 10 is further diffused by the light diffusion sheet 30 laminated on the upper surface of the light guide plate 20, and the print layer 70 is formed. Receiver 4 having
After passing through 0, the light is supplied to an optical display screen (not shown). At this time, the light reflected to the upper surface of the light guide plate 20 by the highlighting dots 14 mainly passes through the highlighting portion 42 of the print layer 70, so that the highlighting portion 42 stands out more than the non-highlighting portion 44 on the optical display screen. It is displayed brightly.

FIG. 2 shows still another embodiment of the illuminated signboard 1 of the present invention. The light reflecting sheet has dots 12 formed not only on the emphasized dots 14 but also on portions corresponding to non-emphasized portions. You are using

Here, as shown in a partial perspective view of the illuminated signboard of FIG. 3, the dots 12 are formed coarsely at positions close to the light source 50 and densely formed at positions remote from the light source 50. . Therefore, the dots 12 can uniformly reflect the light that has entered the light guide plate from the light source 50 and is repeatedly reflected inside the light guide plate 20 to the upper surface of the light guide plate 20.

The dot 1 is diffused by the dot 12 and
The light transmitted to the lower surface 2 is reflected by the light reflecting sheet 10 to the upper surface of the light guide plate 20.

The dots 12 and the light reflecting sheet 1
The light reflected by the light guide plate 20 on the upper surface of the light guide plate 20 is further diffused by the light diffusion sheet 30 on the upper surface of the light guide plate 20, passes through the image receiver 40 having the print layer 70, and is supplied to an optical display screen (not shown). Is done. At this time, dot 1
Since the light reflected to the upper surface of the light guide plate by 2 mainly passes through the non-emphasized portion 44, the non-emphasized portion 44 is also displayed brightly along with the emphasized portion 42 which is markedly brightened by the emphasis dot 14 as described above. Can be.

Hereinafter, each component of the present invention will be described in detail from the lower layer to the upper layer.

First, the light reflecting sheet 10 which is a feature of the present invention is described.
1 has an emphasis dot 14 as shown in FIG. 1 and a dot 12 and an emphasis dot 14 as shown in FIG.
It is possible to use one having both of the above.

Here, as the base material of the light reflecting sheet 10, it is preferable to use a material having excellent surface reflectivity in order to reduce the reflection loss of light as much as possible. It is possible to use a sheet made of a synthetic resin deposited on the surface of the substrate, a synthetic resin having a surface coated with a reflective agent, or the like. If polycarbonate (PC) having a coefficient of expansion similar to that of the acrylic resin used for the light guide plate is used as the base material, the state of adhesion to the light guide plate during thermal bonding can be improved.

The dots 12 and the emphasis dots 14 formed on the light reflecting sheet 10 have a light transmitting property, a light reflecting property, and a mixture of a reflective agent and an adhesive for imparting adhesiveness. Used. At this time, it is preferable to use titanium oxide, calcium carbonate, barium sulfate, or magnesium sulfate as the reflector. Further, it is preferable to use an acrylic or ester-based adhesive as the adhesive. In order to impart appropriate light reflectivity and appropriate adhesiveness, it is preferable to mix the adhesive in an amount of 10 to 300% by weight based on 100 parts by weight of the reflective agent.

When the above-described mixture is printed on the upper surface of the light reflection sheet 10 by using a well-known screen printing method, the dots 12 and the emphasized dots 14 can be formed.

At this time, the dot 12 is, as described above,
As shown in FIG. 4, a portion close to the light source 50 is rough so that light can be uniformly reflected over the entire upper surface of the light guide plate 20,
In addition, it is formed densely in a portion separated from the light source 50.

The emphasizing dot 14 has a shape and area corresponding to the emphasizing portion 42 so as to supply more light to the emphasizing portion 42, and has a shape corresponding to the emphasizing portion 42. It is formed on the upper surface of the reflection sheet 10.

Next, as the light guide plate 20, it is preferable to use a plate-like plate having high transparency so as to have a light guide property, and a plate made of a synthetic resin such as an acrylic resin may be used for handling, weather resistance and the like. This is also preferable from the point of view.

The light diffusing sheet 30 disposed on the upper surface of the light guide plate 20 is preferably made of a material having transparency like the light guide plate so as to transmit light. Also,
As the shape, the surface on which the light from the light guide plate 20 is incident is optically smooth or non-smooth so that more light is diffused, and the light diffusion surface for diffusing light is uneven. It is preferable to use one. At this time, it is preferable that the uneven surface is coated with beads or silica as shown in FIG. 5A, or has a sawtooth-shaped cross section as shown in FIG.

The image receiving member 40 may be a film made of a transparent or translucent synthetic resin so as to transmit light. For example, a film made of a synthetic resin is preferable. In addition, information such as desired characters may be printed on the print layer 70 formed on the upper surface of the image receiving body 40 using ink that can transmit light.

It is to be noted that if a coloring agent is mixed in the emphasis dot 14 or the dot 12 in advance, it is possible to display a color-enhanced portion and a non-emphasis portion on the optical display screen alone.

As described above, the emphasis dot 14 or the dot 1
2 is colored, it is not necessary to provide the print layer 70 on the image receiving body 40 shown in FIGS. 1, 2 and 3, and it is not necessary to dispose the image receiving body 40 itself. It is possible to provide an illuminated signboard that displays the emphasized portion that stands out brightly.

It is also possible to combine the colored dots 12 and the emphasized dots 14 with the printing layer 70.

[0041]

The illuminated signboard according to the present invention uses a light diffusing sheet having emphasized dots formed on the surface thereof in the optical display device so as to correspond to the emphasized portion of the image receiving body.

Thus, the light emitted from the light source and repeatedly reflected inside the light guide plate is reflected by the highlighting dots on the upper surface of the light guide plate and is mainly supplied to the emphasized portion of the image receiving body. On the optical display screen, the highlighted portion can be displayed remarkably bright.

Further, the illuminated signboard according to the present invention uses a light diffusion sheet having dots formed at positions corresponding to non-emphasized portions of the image receiving body together with the emphasized dots.

Thus, the light that is repeatedly reflected inside the light guide plate is reflected toward the upper surface of the light guide plate 20 by not only the emphasized dots but also the dots. Since the light reflected by the dots is mainly supplied to the non-emphasized portion of the image receiving body, the non-emphasized portion as well as the emphasized portion can be displayed brightly on the optical display screen.

That is, the illuminated signboard of the present invention optically displays the emphasized portion of the image receiving body by the emphasized dots and dots formed on the light reflection sheet, and further supplies light to the non-emphasized portion. The brightness of the entire display screen can also be increased.

[Brief description of the drawings]

FIG. 1 is an internal partial cross-sectional view of an illuminated signboard according to an embodiment of the present invention.

FIG. 2 is an internal partial cross-sectional view of the illuminated signboard according to the embodiment of the present invention.

FIG. 3 is a partial perspective view of a light reflecting sheet which is a constituent member of the illuminated signboard of the present invention.

FIG. 4 is an internal partial cross-sectional view of a conventional illuminated signboard.

5A and 5B are partial cross-sectional views of a light diffusion sheet, in which FIG. 5A shows a light diffusion sheet having beads on a light diffusion surface, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Illuminated signboard (this application) 3 ... Illuminated signboard (conventional) 10 ... Light reflection sheet (this application) 12 ... Dot 14 ... Emphasis dot 20 ... Light guide plate 30 ... Light diffusion sheet 40 ... Image receiving body 42 ... Emphasis part 44 ... Non-emphasized part 50 ... Light source 60 ... Light diffusion sheet 62 ... Dot 70 ... Print layer

Claims (5)

[Claims] 1. A light guide plate disposed horizontally in the same plane as a light source, a light diffusion sheet disposed on an upper surface of the light guide plate, and a light reflection sheet disposed on a lower surface of the light guide plate. The light reflecting sheet according to claim 1, wherein the light reflection sheet has an emphasis dot made of a mixture of an adhesive and a reflective agent having high transparency corresponding to a desired emphasis portion. 2. The light reflection sheet according to claim 1, wherein the light reflection sheet has, together with the emphasis dots, dots made of a mixture of an adhesive and a reflection agent having high transparency corresponding to a non-emphasis portion. Illuminated signboard. 3. The illuminated signboard according to claim 1, wherein the adhesive is an acrylic or ester-based adhesive. 4. The illuminated signboard according to claim 1, wherein the reflecting agent is titanium oxide, calcium carbonate, barium sulfate, or magnesium sulfate. 5. The mixing ratio of the mixture is 100
The illuminated signboard according to any one of claims 1 to 4, wherein the reflective agent is mixed in an amount of 10 to 300% by weight with respect to part by weight.