JP2013045641A - Panel type lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a panel type lighting fixture capable of being easily manufactured and preventing leakage and heat generation.SOLUTION: The panel type lighting fixture includes a light guide plate 2 with a dot-pattern 7 formed for making incident light to reflect irregularly, an optical fiber 3 which is arranged in extension along an upper end face (end face) 2a of the light guide plate 2 and makes light incident into the light guide plate 2, a light source 5 for making the optical fiber 3 to emit light, and a reflection mirror 6 which covers the upper end face 2a of the light guide plate 2 and the optical fiber 3 and can reflect the light emitted by the optical fiber 3 to an end face of the light guide plate 2.

Description

  The present invention relates to a panel type lighting apparatus.

Conventionally, as a panel type lighting fixture, a plurality of LED lamps are arranged on the end face of a light guide plate such as a glass plate or an acrylic plate, and the light of the LED lamp incident from the end face of the light guide plate is diffused and emitted from the entire surface of the light guide plate. It is known (see, for example, Patent Document 1).
In this panel-type lighting fixture, the light guide plate is formed by joining a thick transparent panel and a thin diffusion panel, and the diffusion panel uses a milky white translucent acrylic plate.

Further, as a panel-type lighting fixture, there is also known a configuration in which a rough dot pattern is formed by silk printing or the like on a portion where light is diffused, and light is irregularly reflected in this dot pattern.
Such panel-type lighting fixtures do not form a dot pattern on the entire surface of the light guide plate, but form a dot pattern along a desired character, mark, or pattern, thereby emitting light along the character, mark, or pattern. Because it can be used, it is also used for signs and decorations.

Japanese Patent Application Laid-Open No. 2011-100569

Since the above-mentioned panel type lighting fixture has a configuration in which a plurality of LED lamps are arranged on the end face of the light guide plate, there is a problem that it takes time to manufacture the plurality of LED lamps and it takes time to manufacture.
Further, for example, when a panel type lighting fixture is used outdoors, there is a risk of electric leakage or heat generation due to rain or the like splashing on the LED lamp.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a panel-type lighting fixture that can be easily manufactured and can prevent leakage and heat generation.

  To achieve the above object, a light guide plate in which a dot pattern for irregularly reflecting incident light is formed, and an optical fiber that is provided so as to extend along an end surface of the light guide plate and that makes light incident on the light guide plate. A light source that emits light from the optical fiber, and a reflecting mirror that covers the end face of the light guide plate and the optical fiber and reflects light when the optical fiber emits light to the end face of the light guide plate. To do.

In the present invention, by causing the optical fiber in the reflecting mirror to emit light by the light source, the light of the optical fiber is reflected directly and reflected by the reflecting mirror to enter the light guide plate, and is irregularly reflected by the dot pattern formed on the light guide plate. The light guide plate emits light. Then, by making the entire surface of the light guide plate a dot pattern, the entire surface can emit light. Further, by forming a dot pattern along the shape of characters, marks, patterns, etc. on the light guide plate, the characters, marks, patterns can be emitted.
And in the conventional panel type lighting fixture, although the some LED lamp was the structure arranged in the end surface of the light-guide plate, in this invention, an optical fiber extended along the end surface of a light-guide plate instead of an LED lamp. Therefore, the optical fiber is arranged along the end face of the light guide plate, and the optical fiber is covered with a reflecting mirror. Compared with the installation of a plurality of LED lamps, the optical fiber is installed. This can be easily performed, and a panel-type lighting fixture can be easily manufactured.
In addition, since the optical fiber is covered with the reflecting mirror, when the panel type lighting fixture is used outdoors, water such as rain is not applied to the optical fiber, and no leakage occurs even if rainwater leaks.

Moreover, in the panel type lighting fixture according to the present invention, the reflecting mirror is formed in a semicircular arc surface shape having the extending direction of the optical fiber as an axial direction, and the optical fiber is disposed inside. Is preferred.
By doing so, the light emitted from the optical fiber and incident on the reflecting mirror is reflected toward the light guide plate, so that the light can be efficiently incident on the light guide plate.

Moreover, in the panel type lighting fixture which concerns on this invention, the said light source is good also as a sunlight condensing apparatus which condenses sunlight.
By doing in this way, the energy saving type panel type lighting fixture using sunlight is realizable.

In the panel-type lighting fixture according to the present invention, the light source may be an LED light source.
By doing in this way, the color which a light-guide plate light-emits can be changed by changing the color of a LED light source.
Moreover, energy saving and a long life can be aimed at by using a light source as a LED light source.

According to the present invention, in the conventional panel type lighting fixture, a plurality of LED lamps are arranged on the end face of the light guide plate. However, in the present invention, an optical fiber is provided on the end face of the light guide plate instead of the LED lamp. Since the optical fiber is arranged along the end face of the light guide plate and the optical fiber is covered with a reflecting mirror, it is lighter than the installation of a plurality of LED lamps. The fiber can be easily installed, and a panel-type lighting fixture can be easily manufactured.
In addition, since the optical fiber is covered with the reflecting mirror, when the panel type lighting fixture is used outdoors, water such as rain is not applied to the optical fiber, and no leakage occurs even if rainwater leaks.

It is a figure which shows an example of the panel type lighting fixture by embodiment of this invention. It is the sectional view on the AA line of FIG.

(First embodiment)
Hereinafter, the panel type lighting fixture by embodiment of this invention is demonstrated based on FIG. 1 and 2. FIG.
As shown in FIGS. 1 and 2, the panel-type lighting fixture 1 according to the present embodiment includes a horizontally long and substantially rectangular plate-shaped light guide plate 2 and an end face 2 a of the light guide plate 2. 3, an optical fiber bundle 4, a light source 5 (see FIG. 1) that allows light to pass through the plurality of optical fibers 3, and a reflecting mirror that is installed so as to cover the end surface 2 a of the light guide plate 2 and the plurality of optical fibers 3. 6 are provided.

The light guide plate 2 is made of, for example, glass such as float glass or highly transmissive glass, acrylic, or the like, and an arbitrary character, mark, or pattern dot pattern 7 is formed on one surface. The dot pattern 7 is formed into a rough surface by silk printing or the like, and is configured to diffusely emit by diffuse reflection when light is incident.
In the present embodiment, a character dot pattern 7 is formed on the light guide plate 2. The dot pattern 7 is not only partially formed on one side of the light guide plate 2 such as characters, marks, or patterns, but may be formed on the entire one side of the light guide plate 2. Good. The dot pattern 7 may be formed on both surfaces of the light guide plate 2.

  Further, in the present embodiment, the light guide plate 2 is erected on the installation surface so as to have a horizontally long and substantially rectangular shape when viewed from the front. The end surface 2a on which the optical fiber bundle 4 is disposed is the upper end surface. Hereinafter, the end surface 2a on which the optical fiber bundle 4 is arranged will be described as an upper end surface 2a.

The optical fiber 3 is a known optical fiber including a core and a clad surrounding the core, and is disposed along the length direction (the direction of arrow A in FIG. 1) of the upper end surface 2 a of the light guide plate 2.
In this embodiment, an optical fiber bundle 4 in which a plurality of optical fibers 3 are bundled is processed and used as a shielded optical fiber cable 9 accommodated in a shield 8. In the optical fiber bundle 4, the portion 4 a installed on the upper end surface 2 a of the light guide plate 2 is in an exposed state without the shield 8 and is continuous with the portion installed on the upper end surface 2 a of the light guide plate 2. The portion 4 b connected to the light source 5 is covered with the shield 8.
In the present embodiment, a sunlight condensing device that condenses sunlight is used as the light source 5.

The reflecting mirror 6 extends to the same length as the upper end surface 2 a of the light guide plate 2, and is disposed at both ends of the semicylindrical member 11 having a semicircular arc-shaped cross section perpendicular to the length direction. A pair of semicircular plate-like semicircular disk members 12.
The semi-cylindrical member 11 is installed so that the inner side faces the upper end surface 2 a of the light guide plate 2, and covers the upper end surface 2 a of the light guide plate 2 and the optical fiber bundle 4. And the semicircular disk member 12 is installed in the both ends of the semicylindrical member 11, respectively, The end part side of the optical fiber bundle 4 is also covered.
In addition, a hole 13 into which the optical fiber bundle 4 can be inserted is formed in the semicircular member 12A installed on the light source 5 side of the pair of semicircular members 12.
The inner side of the semi-cylindrical member 11 and the inner side of the semi-disc member 12 are formed as mirror surfaces that can reflect the light emitted from the optical fiber 3.

In the panel type lighting fixture 1 according to the present embodiment, when light is sent from the light source 5 to the optical fiber 3, the portion of the optical fiber 3 installed on the upper end surface 2 a of the light guide plate 2 emits light, and the light is emitted. The light enters the light guide plate 2 from the upper end surface 2a. At this time, the light emitted from the optical fiber 3 and reflected by the reflecting mirror 6 also enters the light guide plate 2 from the upper end surface 2a.
The light incident on the light guide plate 2 is diffusely reflected by the dot pattern 7 and emitted along the dot pattern 7 to display the characters.

Next, the effect of the panel type lighting fixture 1 mentioned above is demonstrated using drawing.
According to the panel type lighting fixture 1 according to the present embodiment, the optical fiber 3 is the upper end surface of the light guide plate 2 instead of the LED lamp of the conventional panel type lighting fixture in which a plurality of LED lamps are arranged on the end surface of the light guide plate 2. Since it is provided so as to extend along 2a, the optical fiber 3 can be easily installed and manufactured easily as compared with the installation of a plurality of LED lamps.
Moreover, since the optical fiber 3 is used without using the LED lamp, the leakage of the panel-type lighting fixture 1 and heat generation can be prevented when used outdoors.

Further, the reflecting mirror 6 includes the semi-cylindrical semi-cylindrical member 11, so that the light reflected from the semi-cylindrical member 11 can be efficiently incident on the light guide plate 2.
Moreover, by using a sunlight condensing device as the light source 5, it is possible to realize an energy-saving panel type lighting fixture using sunlight.

As mentioned above, although embodiment of the panel type lighting fixture 1 by this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably.
For example, in the above-described embodiment, a solar light collecting device is used as the light source 5. However, for example, an LED light source may be used instead of the solar light collecting device. And when using a LED light source for the light source 5, the color of the character light-emitted from the dot pattern 7 can be changed by changing the light emission color. Moreover, energy saving and long life can be aimed at by using the light source 5 as an LED light source.
In the above-described embodiment, the power source may be a solar battery. By doing in this way, the energy-saving panel type lighting fixture 1 using photovoltaic power generation is realizable.
In the above-described embodiment, the light guide plate 2 having the dot pattern 7 formed on one side is used. However, the light guide plate 2 may be a laminated glass light guide plate 2 having the dot pattern 7 formed therein. It is good also as the light-guide plate 2 of the multilayer glass in which the dot pattern 7 was formed and the inside was filled with argon gas.

In the above-described embodiment, the optical fiber bundle 4 is arranged on the upper end surface 2a of the light guide plate 2. However, the present invention is not limited to this. A bundle 4 may be arranged.
In the above-described embodiment, the light guide plate 2 having a substantially rectangular shape is used. However, for example, other shapes such as a triangle, a rhombus, and an ellipse may be used when viewed from the front. In short, it is only necessary that the optical fiber 3 is disposed on at least a part of the end surface of the light guide plate 2 and the optical fiber 3 can be covered with the reflecting mirror 6.

DESCRIPTION OF SYMBOLS 1 Panel type lighting fixture 2 Light guide plate 2a Upper end surface (end surface)
3 Optical fiber 4 Optical fiber bundle 5 Light source 6 Reflector 7 Dot pattern 8 Shield 9 Optical fiber cable 11 Semi-cylindrical member 12 Semi-disc member

Claims (4)

A light guide plate formed with a dot pattern for irregularly reflecting incident light; and
An optical fiber that is provided so as to extend along an end surface of the light guide plate and that makes light incident on the light guide plate;
A light source for emitting the optical fiber;
A panel-type lighting fixture comprising: a reflecting mirror that covers the end face of the light guide plate and the optical fiber, and is capable of reflecting light when the optical fiber emits light to the end face of the light guide plate.   The panel type according to claim 1, wherein the reflecting mirror is formed in a semicircular arc shape having an extending direction of the optical fiber as an axial direction, and the optical fiber is disposed on the inner side. lighting equipment.   The panel-type lighting fixture according to claim 1, wherein the light source is a sunlight condensing device that condenses sunlight. The panel-type lighting device according to claim 1, wherein the light source is an LED light source.

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