JP2002042537A - Light guide plate device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a larger light guide plate device. SOLUTION: The light guide plate device is provided where a plurality light guide plates 12 and 1 molded of a transparent acrylic resin are arranged side by side, with light incidence surfaces 2 and 2 positioned on the rear surface sides of them. In figure 1, the light incidence surface 2 is formed on the end surface provided by bending the end part of the light guide plate 1 toward the rear surface side. A front surface of a transparent material 3 tightly contacts the light incidence surface 2 while a tip side of a light-emitting element 5 such as a light-emitting diode is inserted in a recess 4 provided on the rear surface of the transparent material 3, thus the light from the light-emitting element 5 enters the light incidence surface 2. The light incident on the light incidence surface 2 passes inside the light guide plate 1, and then reflected on a light reflection surface 6 where many recessed lines or projected lines are formed on the rear surface of the light guide plate 1, then emitted outside from a smooth light exit surface 7 which is the front surface of the light guide plate 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate device in which a plurality of light guide plates are arranged.

[0002]

2. Description of the Related Art A conventional light guide plate has a light incident surface at an end of a transparent material having a flat plate shape as a whole.

[0003]

When the size of the light guide plate is increased, the light incident on the light guide plate hardly reaches a distant place, so that light unevenness tends to be conspicuous on the light emitting surface, and there is a limit to the size increase. . The present invention has been made in view of such problems to be solved, and has as its object to provide a light guide plate device that can be increased in size.

[0004]

Means for solving the problems are as described in the claims.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described. However, this is merely an exemplary embodiment adopted based on the present invention, and the present invention will be described based on matters unique to the embodiment. Therefore, the technical scope of the present invention should be determined based on the matters stated in the claims and matters substantially equivalent to the matters.

In the embodiment shown in FIG. 1, a plurality of light guide plates 1, 1 formed of a transparent acrylic resin or the like are arranged side by side, and the light guide plates 1, 1 are located on the back side of the light guide plates 1, 1. Is a light guide plate device provided with light incident surfaces 2 and 2.
In this example, a light incident surface 2 is formed on an end surface of a portion where the end of the light guide plate 1 is bent toward the back side. The front surface of the transparent material 3 is closely arranged on the light incident surface 2, and the transparent material 3
The tip side of a light emitting element 5 such as a light emitting diode is inserted into a concave portion 4 provided on the back surface of the light emitting element, and light from the light emitting element 5 enters the light incident surface 2. The light incident on the light incident surface 2 passes through the inside of the light guide plate 1, is reflected on the light reflection surface 6 formed with a large number of concave or convex stripes on the back surface of the light guide plate 1, and is reflected on the front surface of the light guide plate 1. Are emitted to the outside from the smooth light emitting surface 7. In this way, a light guide plate device in which the plurality of light guide plates 1 and 1 are arranged substantially without gaps can be configured.

FIG. 2 also shows a light guide plate device in which light incident surfaces 2 and 2 are provided on the light guide plates 1 and 1 so as to be located on the back side of the light guide plates 1 and 1. In this example, the light reflecting surface 6 on the back surface of the light guide plate 1 is formed as an inclined surface as a whole, and the light incident surface 2 is formed on the back side of the light guide plate 1.

FIG. 3 and FIG. 4 show a light guide plate device in which a plurality of light guide plates 1, 1,... Are arranged side by side in a cylindrical or prismatic annular shape, and a three-dimensional light guide plate device is realized.

Thus, according to the present embodiment, a large-sized light guide plate device can be realized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing another embodiment of the present invention.

FIG. 3 is a perspective view showing still another embodiment of the present invention.

FIG. 4 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

 1 light guide plate 2 light incident surface

Claims (3)

[Claims] 1. A light guide plate device in which a plurality of light guide plates are arranged side by side, and the light guide plate is provided with a light incident surface so as to be located on the back side of the light guide plate. 2. The light guide plate device according to claim 1, wherein the plurality of light guide plates are arranged substantially without gaps. 3. The light guide plate device according to claim 1, wherein the plurality of light guide plates are arranged in a ring shape.