JP2604455Y2 - Fluorescent display - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent display device, and more specifically, a fluorescent display which can be clearly recognized both when exposed to sunlight, when there is no sunlight, and when it is irradiated with ultraviolet rays to produce a fluorescent color. The present invention relates to a fluorescent display device which is particularly suitable for use as a road sign.

[0002]

2. Description of the Related Art Conventionally, various display devices have been provided. In particular, among various display devices, a road sign is one that is required to have high visibility. Such a road sign is required not to be dazzled by the driver and to be excellent in visibility.

[0003] In particular, a road sign can be visually recognized by sunlight in the daytime, but cannot be visually recognized at night. Therefore, generally, a road sign installed at a relatively low position can be visually recognized by sunlight in the daytime, and can be visually recognized by light from a headlight of a passing automobile at nighttime.

[0004] Among the road signs, there are road signs installed at a position higher than a car traveling on the road, for example, a direction instruction display plate, a distance instruction display plate, a place instruction display plate indicating a tollgate, and the like. . Such a road sign is visually recognized by sunlight during the daytime, and has a separate lighting means because light from a headlight of an automobile does not reach at nighttime.

The lighting means used here includes:
Since the light source cannot be used due to the dazzling eyes in normal light, the entire structure is formed in a hollow box shape and the light source is inserted inside, so replacement when the light source is cut or the like is extremely complicated. It was supposed to be. Therefore, it has already been proposed by the same applicant to improve the night visibility by using a fluorescent display unit as the display unit, using ultraviolet light as illumination means, and causing the fluorescent display unit to emit fluorescent light.

When formed in this manner, ultraviolet light does not dazzle the eyes and can be used as exposure light. Therefore, it is easy to replace the light source when it is cut off, and the fluorescent display unit emits fluorescent light. Is excellent in visibility.

[0007]

[Problem to be solved by the invention] Although such a road sign is installed beside a road, especially in the daytime,
Sometimes the driver overlooked it. This was, of course, also possible at night. In addition, about such a conventional example, the same can be said of a signboard etc. other than a road sign.

Therefore, in the present invention, the invention according to claim 1 provides a display portion drawn by using a phosphor and a urethane resin-based ink on a substrate, and further comprises:
Light-transmitting glass beads with a diameter of 50 μm to 2000 μm
By forming a diffuse reflection layer due to noise, and further providing an irradiation source for irradiating the display unit with ultraviolet rays, particularly by night to make the display stand out by the fluorescent color, and also by daylight formation by the diffuse reflection of the diffuse reflection layer. ,
It is an object of the present invention to provide a fluorescent display device in which oversight is prevented within a range that is not dazzled.

Further, according to the present invention, the irregular reflection layer has a diameter of 50 μm.
With light transmissive glass beads of m to 2000 μm,
An object of the present invention is to provide a fluorescent display device which can be easily manufactured and has improved weather resistance.

[0010]

In order to achieve the above-mentioned object, the present invention provides a phosphor and a urethane resin on a substrate.
A display section drawn using ink is provided, and the surface of the display section has a light transmittance of 50 μm to 2000 μm in diameter.
A diffused reflection layer made of glass beads, and an irradiation source for irradiating the display section with ultraviolet light.

[0011]

[0012]

In the road sign using the phosphor according to the present invention, the display portion is visually recognized in the daytime by sunlight, but the display portion itself has a light-transmissive irregular reflection layer provided on the surface of the display portion, so that the display portion itself is visible. Not only can the display unit be overlooked due to the irregular reflection of the irregular reflection layer, but also.

In the nighttime, the display unit emits fluorescent light by irradiating the display unit with ultraviolet rays at night, so that various displays can be easily recognized by the eyes, and the display unit can be easily recognized by the diffuse reflection of the diffuse reflection layer. Will not be overlooked. Further, when the irregular reflection layer is formed of glass beads, the glass beads themselves can be used for a long period of time due to their excellent weather resistance and light transmittance.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a state in which the fluorescent display device according to the present invention is applied to a road sign, and FIG. 2 is an enlarged sectional view of the same. In the figure, the road sign device includes a display unit 20 in which a part or all of information required by a road sign 10 is drawn using a phosphor, and an irradiation source 30 that irradiates the display unit 20 with ultraviolet rays. Is provided. On the surface of the display section 20, a diffuse reflection layer 40 is formed. Here, a hood 31 is provided above the irradiation source 30.

Further, the road sign device is shown as having a road sign 10 indicating that the vehicle will go straight to "Tokyo" when it goes straight on the road and to reach "Chiba" when it turns left. Here, an arrow display section 12 and a place name display section 1 of "Tokyo" and "Chiba" required in the road sign 10 are shown.
The portion of the bag 14 excluding 3 is painted in advance using a paint that exhibits a green color under sunlight. Further, the arrow display unit 12 and the place name display unit 13 of “Tokyo” and “Chiba” use a paint containing a phosphor that exhibits white under sunlight and also exhibits white when irradiated with ultraviolet rays. It is what is drawn. Therefore, in this embodiment, only the arrow display section 12 and the place name display section 13 of "Tokyo" and "Chiba" can be said to be the display section 20. In this embodiment,
Arrow display section 12 and place name display section 13 as display section 20
Is provided with the irregular reflection layer 40.

Accordingly, in the daytime, the road sign 10 having the white arrow display section 12 and the place name display section 13 on the green back 14 is visually recognized. In addition, sunlight is displayed on display unit 2.
When the light hits 0, the sunlight first hits the diffuse reflection layer 40, so that the driver or the like will be shining light at the road sign 10, and the road sign 10, and hence the display unit 20.
Never overlook.

At night, only the arrow display section 12 as the display section 20 and the place name display section 13 of "Tokyo" and "Chiba" emit fluorescent light due to ultraviolet irradiation from the irradiation source 30. Therefore, at night, only the fluorescently colored arrow display section 12 and the place name display sections 13 of "Tokyo" and "Chiba" appear to be raised. Also at this time, not only the fluorescent coloring itself is conspicuous, but also the fluorescent coloring light is diffusely reflected by the diffuse reflection layer 40, so that the fluorescent coloring part is brilliant, and the road sign 10 and the display unit 2
0 is not overlooked.

Of course, in this case, the back 14 of the road sign 10 can be drawn with a paint containing a phosphor which exhibits a green color under sunlight and also exhibits a green color when irradiated with ultraviolet rays. . In this case, the entire surface of the road sign 10 can be said to be the display unit 20. In this case, as in the case of the above-described road sign 10, the road sign 1 having a white arrow display portion 12 and a place name display portion 13 on a green background 14 in the daytime.
It is visually recognized as 0. However, at night, not only the arrow display section 12 and the place name display sections 13 of "Tokyo" and "Chiba" but also the portion of the back 14 emits fluorescent light, so that the visibility is further improved.

In such a case, the irregular reflection layer 40 can be formed on the entire surface of the road sign 10 as the display section 20, or the irregular reflection layer 40 can be formed only on the arrow display section 12 and the place name display section 13 of the display section 20. 40 or back 1
4 may be provided with the irregular reflection layer 40. Whichever part of the irregular reflection layer 40 is provided, it is sufficient that the road sign 10 be brilliant and stand out by reflection.

Furthermore, in the embodiment, only the arrow in the direction of Chiba and the place name display of "Chiba" are drawn using a paint containing a phosphor which looks blue in the daytime and shows a blue color even when fluorescent. Since it can be clearly distinguished from "Tokyo" when the vehicle goes straight to emit white fluorescent light, the visibility is further improved. In the above description, the color that is recognized by the sunlight during the daytime and the color when the fluorescent color is emitted are described as an example of the phosphor that is the same color. However, different colors may be used.

Regardless of the type of fluorescent material used, the fluorescent color is clearly visible but easy on the eyes, and is also useful for relieving stress on drivers running on highways and the like. is there. Here, as a powder of a fluorescent material constituting a display portion that emits light by ultraviolet irradiation, white light emission can be classified according to the color of light emission.
-B, YS-A, HG-A Light color emission Nemoto Special Chemical Co., Ltd. Product name YS-
A, HG-A Blue light emission Nemoto Special Chemical Co., Ltd. Product name ALN
-B Red light emission Nemoto Special Chemical Co., Ltd. Product name YS-
A Green light emission Product name HG-
A is given.

In order to provide the display section 20 on the road sign 10, a powder pigment of a fluorescent material is dispersed in a urethane resin-based ink at a weight ratio of 2: 1 to form a UV-irradiated luminescent material. . Next, the display unit 20 is printed directly on the road sign 10 using the ultraviolet irradiation light emitting material,
The coating and fixing can be performed by drying for about 15 minutes.

[0023]

The irradiation source 30 has a wavelength of 300 to 4
A 00 nm ultraviolet lamp is used. Specifically, for example, BL-B1 manufactured by Matsushita Electric Industrial Co., Ltd.
A 5 W ultraviolet lamp can be used.

Here, the ultraviolet light from the irradiation source 30 is
Since it is out of the visible light range, the irradiation source 30
Even if ultraviolet light from the eyes enters the eyes, the driver does not recognize it and therefore does not dazzle the driver. Furthermore, in the embodiment, since the irradiation source 30 is provided as an external exposure type, even if the irradiation source 30 is cut, it can be easily replaced.

Further, as the irregular reflection layer 40, fine glass beads, for example, glass beads having a diameter of about 100 μm, are fixed to the display section 20 by adhering to the surface of the display section 20 before the display section 20 dries. be able to. Further, when the irregular reflection layer 40 is formed of glass beads as described above, the glass beads themselves can be used for a long period of time due to their excellent weather resistance and light transmittance.

On the other hand, the irregular reflection layer 40 can be formed by preparing glass beads fixed on a transparent sheet, cutting the glass beads into an appropriate shape, and affixing the glass beads on the display section 20. In this way, the manufacture of the road sign 10 is facilitated. In this case, for example, a polyurethane resin can be used as the sheet, and a methacrylic resin can be used as an adhesive for fixing the glass beads. Further, glass beads having a diameter of about 100 μm can be used. Can be used.

Here, as the diameter of the glass beads increases, diffuse reflection increases and becomes conspicuous.
It becomes difficult to clearly identify the boundary of the image. Also, when the diameter is reduced, the boundary of the display unit 20 and the like can be clearly identified, but it is less noticeable. Then, it was confirmed that the diameter was in the range of 50 μm to 2000 μm as a practical range.

In the embodiment described above, the present invention is applied to the case where the road sign 10 is applied. However, the present invention can be applied to various displays such as a signboard.

[0030]

[Effects of the Invention] As described above, in the present invention,
The invention according to claim 1 is to provide a display section drawn using a phosphor on a substrate, to form a light-transmissive irregular reflection layer on the surface of the display section, and to further irradiate the display section with ultraviolet rays. By providing a light source, the fluorescent light is made to be conspicuous especially at night, and furthermore, it is made to be conspicuous by the diffuse reflection of the diffuse reflection layer even in the day, thereby preventing oversight within a range not to be dazzled.

Further, according to the present invention, the irregular reflection layer has a diameter of 50 μm.
With light transmissive glass beads of m to 2000 μm,
It can be easily manufactured and has improved weather resistance.

[Brief description of the drawings]

FIG. 1 is a front view showing a fluorescent display device according to the present invention.

FIG. 2 is an enlarged sectional view showing the fluorescent display device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Road sign 12 Arrow display part 13 Place name display part 14 Back 20 Display part 30 Irradiation source 31 Hood 40 Diffuse reflection layer

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-6-67514 (JP, U) JP-A-57-133004 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G09F 13/16 G09F 13/20 G09F 13/42

Claims (1)

(57) [Scope of request for utility model registration] 1. A phosphor and a urethane resin-based ink on a substrate.
A display unit drawn using a key is provided, and a light-transmitting gas having a diameter of 50 μm to 2000 μm is provided on the surface of the display unit.
A fluorescent display device, comprising : a diffuse reflection layer of ras beads ; and an irradiation source for irradiating the display unit with ultraviolet light.