JPH09230809A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device having simple constitution which can mount an optical fiber to a display board without using an adhesive. SOLUTION: Plural mounting holes 1a for passing through with optical fibers 10a are provided in a display board 1 in which a base material having a prescribed thickness (d) as the display board 1 of a display device is used, each optical fiber 10a is passed through each mounting hole 1a, a prescribed bending force is given to a part of the optical fiber of internal side from the display board 1 in the reverse direction to a tip of the optical fiber 10 utilizing elasticity of each optical fiber 10a, and the optical fiber 10a is fixed to the display board 1 by bending the optical fiber 10a. In this case, a transparent plate 3 is provided forward the display board 1 of the display device keeping a prescribed interval, and tips of each optical fiber 10a passed through each mounting holes 1a of the display board 1a are abutted on the transparent plate 3. Furthermore, an acrylic plate is used as the transparent plate, and both of the display board 1 and the transparent plate 3 are mounted keeping a prescribed interval by a spacer 5 is provided between the display board 1 and the transparent plate 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a display device using an optical fiber used for various purposes such as signboards, illuminations and road signs.

[0002]

2. Description of the Related Art Conventionally, as a display device for this kind of use,
There is a display device as shown in FIG. In the figure, K is a light source, 10 is a plurality of optical fibers for transmitting the light of the light source K to the display board 11, and the desired characters or the like are displayed by using the light emission from each tip of the plurality of optical fibers 10. Is. 12
Reference characters a and 12b are character holes formed on the display plate 11 for forming each character, and in this example, are character holes for forming two characters "Caution". The respective tip portions of the optical fiber 10 are inserted into these character holes 12a and 12b, and the respective tip portions of these optical fibers are connected to the display board 11.
As shown in Fig. 3, project forward from the character hole inside the
The letters are formed by the light emission from the tip of the optical fiber. FIG. 3 shows a state in which the optical fiber 10 is attached to the display plate 11 in the display device as a representative of one optical fiber 10a. As shown in FIG. The optical fiber 10a of the book is penetrated and projected, and the optical fiber 10a is fixed to the inner surface side of the display board 11 with the adhesive 13. The adhesive 13 prevented dew condensation on the inner surface of each optical fiber 10a and also served as an adhesive shield.

[0003]

By the way, in the conventional display device, since the optical fiber is fixed to the display plate with the adhesive as described above, there are the following problems. (1) Since a large number of optical fibers are fixed to the display board with an adhesive, it is necessary to fix each optical fiber until they are bonded, and workability is poor. (2) It is difficult to align the tips of a large number of optical fibers provided on the display plate so as to be uniform, and there has been a waste of time and labor for arranging the lengths for uniform alignment. (3) Since the tips of many optical fibers protrude from the display plate, it is difficult to clean the display plate from dirt. An object of the present invention is to provide a display device which solves the above-mentioned problems (problems) of the conventional one.

[0004]

In order to solve the above-mentioned problems, the display device of the present invention uses a base material having a predetermined thickness as a display plate of the display device, and a plurality of optical fiber penetrating plates are used for the display plate. The mounting holes are provided, the optical fibers are inserted into the mounting holes, and the elasticity of each optical fiber is used to apply a predetermined bending force to the inner surface of the display plate in the direction opposite to the tip of the optical fiber. By bending the optical fiber, the optical fiber is fixed to the display plate. In this case, a transparent plate is provided in front of the display plate of the display device at a predetermined interval, and the tip of each optical fiber penetrating each mounting hole of the display plate is brought into contact with the transparent plate. An acrylic plate may be used as the transparent plate, and a spacer may be provided between the display plate and the transparent plate to form a predetermined space so that both the display plate and the transparent plate can be attached.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The structure from the light source to the display plate of the display device to which the present invention is applied and the structure of characters displayed on the display plate may be the same as those in FIG. The present invention will be specifically described below with reference to the embodiment shown in FIG. FIG. 1 is a vertical sectional front view of a main part of a display device according to an embodiment of the present invention. In this figure, a state in which an optical fiber is attached to a display plate is represented by one optical fiber 10a. In the figure, 1 is a display plate, and the thickness d of the display plate 1
Consists of a substrate that is thicker than the thickness of a conventional display board. 1a
Is a mounting hole for penetrating the optical fiber 10a provided in the display plate 1. In addition, the mounting hole 1a is formed in the display plate 1
The required number is provided in relation to the character holes formed in.
The diameter D ₁ of the mounting hole 1a is equal to the diameter D _{2 of the} optical fiber 10a.
The position of the tip of the optical fiber 10a protruding forward from the display plate 1 can be accurately aligned. A transparent plate 3 made of a transparent material such as an acrylic plate is attached to the display plate 1 via a spacer 5 so as to form a predetermined space 4. The optical fiber 10a penetrates into the mounting hole 1a of the display plate 1, passes through the space 4, and is arranged so that its tip comes into contact with the back surface of the transparent plate 3. In this case, the spacer 5 also has a function of maintaining airtightness. Similarly, other optical fibers attached to the display plate 1 are attached to the display plate 1 in the same manner as the optical fiber 10a shown in FIG. 1, and the display device of the present invention is configured. As described above, in the display device of the present invention, the plurality of optical fibers 10a are inserted into the respective mounting holes 1a of the display plate 1, pass through the space portion 4, and the tips of the respective optical fibers abut on the back surface of the transparent plate 3. The optical fibers 10 a are fixed to the display plate 1 by bending each optical fiber 10 a on the inner surface side (front side) of the display plate 1 as shown by an arrow so as not to be bent. In this case, the thickness of the display board 1 has a required thickness as shown by d, and the diameter of the mounting hole 1a is as close as possible to the diameter of the optical fiber 10a as described above. The penetrating portion is tightly supported by the inner wall portion of the mounting hole 1a of the display plate 1, and even if the optical fiber 10a is bent as described above, the light emission from the tip of the optical fiber 10a protruding to the outer surface side of the display plate 1 is performed. Light is prevented from leaking to the inner surface side of the display plate 1 through the mounting hole 1a. In addition, the optical fiber 10a is formed on the inner surface of the transparent plate 3.
By abutting the tip of the optical fiber 10a, it becomes easy to make the protruding length of the tip of the optical fiber 10a uniform, and the transparent plate 3 also has a function of a cover for covering the display plate 1 and the optical fiber 10a. The airtightness with respect to the outside air can be maintained without attaching a special shield when attaching each optical fiber to the optical fiber 1.

[0006]

Since the display device of the present invention is constructed as described above, it has the following excellent effects. (1) By increasing the thickness of the base material of the display plate, the optical fiber is supported by the thickness portion of the display plate (inner wall surface of the mounting hole), and the optical fiber is supported on the inner surface side of the display plate. By applying a predetermined bending force, each optical fiber can be properly attached to the display plate without the need for an adhesive. Therefore, the workability is significantly improved as compared with the case where the conventional optical fiber is fixed with an adhesive. (2) If a transparent plate is provided in the front of the display plate with a predetermined space therebetween, the tip of each optical fiber is brought into contact with the transparent plate, so that uniform positioning of the tip of each optical fiber is facilitated. It can be carried out. Further, with such a configuration, since the display characters stand out on the transparent plate, the aesthetic effect as illumination is also improved. Since this transparent plate also has a function as a cover that does not expose the tips of the display plate and the optical fibers to the atmosphere in which dust floats, it is not necessary to provide a special shield when attaching each optical fiber to the display plate. The airtightness to the outside air can be maintained, and a clear display can always be performed by cleaning the surface of the transparent plate without contaminating the tip of the optical fiber. (3) It is practical to use an acrylic plate as the transparent plate because it is lightweight and inexpensive.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a main part of a display device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a conventional display device.

FIG. 3 is a vertical sectional front view of a main part of the display device of FIG.

[Explanation of symbols]

 1: Display plate 1a: Mounting hole 3: Transparent plate 4: Space 5: Spacer 10a: Optical fiber

Claims (3)

[Claims] 1. A display device for sending light from a light emitting source to a display plate through a plurality of optical fibers and performing a desired display by emitting light from these optical fibers, wherein the display plate is a base material having a predetermined thickness. This display plate is provided with a plurality of mounting holes for optical fiber penetration, each of the optical fibers is inserted into each mounting hole, and the elasticity of each optical fiber is used to display in the direction opposite to the tip of the optical fiber. A display device characterized in that the optical fiber is fixed to the display plate by applying a predetermined bending force to a portion on the inner surface side of the plate to bend the optical fiber. 2. A transparent plate is provided in front of a display plate of the display device at a predetermined distance, and the tip of each optical fiber penetrating each mounting hole of the display plate is brought into contact with the transparent plate. The display device according to claim 1, further comprising: 3. An acrylic plate is used as the transparent plate, and a spacer is provided between the display plate and the transparent plate so that both the display plate and the transparent plate are attached at a predetermined interval. 1. The display device according to 1.