JP6990581B2 - Lighting equipment - Google Patents

Description

The present invention relates to a lighting device including a light source and a light guide.

There is a lighting device that includes a light source and a light guide, and introduces light from the light source into the light guide to emit light.
The lighting device disclosed in Patent Document 1 below is a lighting device provided at the bottom of the cup holder in order to illuminate the inside of the cup holder of the vehicle, and is arranged on a transparent light guide plate and the back side of the light guide plate. It is equipped with a light source.

On the front side of the light guide plate, a concave first reflecting portion is formed at a position facing the light source. The first reflecting portion has a conical tapered surface having a downward gradient toward the center, and reflects the light from the light source in the direction along the surface of the light guide plate. A second reflective portion is formed on the outer peripheral portion on the back side of the light guide plate so that the corner portion is cut off. The second reflecting portion has a tapered surface substantially parallel to the tapered surface of the first reflecting portion, and reflects the light reflected by the first reflecting portion upward. As a result, the light is emitted from the front surface of the light guide plate, and the outer peripheral portion of the light guide plate emits light.

JP-A-2015-229455 (FIGS. 3 to 6)

In the lighting device of Patent Document 1, tapered surfaces must be processed on the front side and the back side of the light guide plate as the first and second reflecting portions, respectively, and the structure of the light guide plate is complicated.

In order to solve the above problems, the lighting device of the present invention is provided at a position facing the light source on the light guide plate, the light source arranged on the back side of the light guide plate, and the front surface of the light guide plate. It is characterized by comprising one light diffusing portion and a second light diffusing portion provided at a position away from the first light diffusing portion on the back surface of the light guide plate.

According to the above configuration, the light from the light source is diffusely reflected (diffusely reflected) by the first light diffusing portion provided on the front surface of the light guide plate, and propagates inside the light guide plate while repeating internal reflection. A part of the light reaches the second light diffusing portion provided on the back surface of the light guide plate, is diffusely reflected here, and is emitted to the outside from the front surface of the light guide plate. The emitted light illuminates the periphery of the front side of the light guide plate. Therefore, it is possible to perform lighting using the light guide plate with a simplified configuration without performing complicated processing on the light guide plate.

Preferably, at least one of the first and second light diffusing portions is removable from the light guide plate.
According to the above configuration, the installation position of the first and / or the second light diffusing part can be changed, and the degree of freedom of arrangement can be increased. When the first light diffusing portion is removable, the light guide plate can be shared with another lighting device having a different position of the light source. When the second light diffusing portion is removable, the part to be illuminated with light can be changed.

At least one of the first and second light diffusing portions is formed in a sheet shape and is attached to the outer surface of the light guide plate.
According to the above configuration, lighting using a light guide plate can be performed with an extremely simple configuration.

According to the present invention, it is possible to provide a lighting device having a simplified configuration using a light guide plate.

It is a top view of the cup holder provided with the lighting apparatus which concerns on 1st Embodiment of this invention. It is a top view of the light guide plate of the lighting apparatus. It is sectional drawing which follows the line III-III of FIG. It is an enlarged sectional view of the main part in the bottom part of a container holder. It is a top view of the cup holder provided with the lighting apparatus which concerns on 2nd Embodiment of this invention. It is a top view of the decorative plate of the lighting device. It is sectional drawing which follows the line VII-VII of FIG. It is a top view of the light guide plate of the lighting apparatus which concerns on 3rd Embodiment of this invention.

[First Embodiment]
Hereinafter, the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. In this embodiment, the present invention is applied to a lighting device for a cup holder, which is an interior component of an automobile.
The cup holder H is provided, for example, on a center console (not shown) that separates the driver's seat and the passenger seat, and accommodates and holds the beverage container. As shown in FIGS. 1 and 3, the cup holder H includes a case 1 and a partition 2. The case 1 has a bottom wall 1a and a side wall 1b that rises upward from the peripheral edge thereof, and the cross section has a substantially oval shape. The partition 2 is arranged between the central portions of the pair of long sides of the side wall 1b. As a result, the space inside the case 1 is divided into two, and two beverage containers are accommodated.

The lighting device 10 is provided at the bottom of the cup holder H, and has a light guide plate 11 and a light source 12 arranged below the light guide plate 11. The light source 12 faces the through hole 1c formed in the central portion of the bottom wall 1a of the cup holder H from below, and irradiates light toward the light guide plate 11. A light bulb, an LED (light emitting diode), or the like is used as the light source 12. As the light source 12, a light source having a desired emission color may be adopted, if necessary.

The light guide plate 11 shown in FIG. 2 is a colorless and transparent plate formed in a substantially oval shape, is slightly smaller than the bottom wall 1a of the cup holder H, is placed on the upper surface of the bottom wall 1a, and is placed on the bottom wall 1a. Covers most of. For the light guide plate 11, a light guide resin material having light transmittance, for example, an acrylic resin or a polycarbonate resin is used.

A first light diffusing portion 13 is provided on the upper surface (front surface) of the light guide plate 11 at a position facing the light source 12. In this embodiment, the first light diffusing unit 13 is located directly below the partition 2 and cannot be visually recognized from above the cup holder H. The surface of the first light diffusing unit 13 on the light source 12 side is not microscopically flat, and the light that hits the surface is diffused in all directions. Therefore, the light from the light source 12 is diffusely reflected in the light guide plate 11.

In this embodiment, a circular white resin film seal is used as the first light diffusing portion 13. The first light diffusing portion 13 is attached to the outer surface of the light guide plate 11 after molding the light guide plate 11, and can be peeled off.

The lower surface (back surface) of the light guide plate 11 is provided with second light diffusing portions 14 and 14 between the center and both ends of the light guide plate 11 in the long axis direction, respectively. It is arranged away from the light diffuser 13. Similar to the first light diffusing unit 13, the surface of the second light diffusing unit 14 on the light guide plate 11 side is not microscopically flat, and the light hitting the surface is diffused in all directions. Therefore, the light propagated by the inner surface reflection in the light guide plate 11 is diffusely reflected.

In this embodiment, a white resin film seal is used as the second light diffusing portions 14, 14. The second light diffusing portion 14 is attached to the outer surface of the light guide plate 11 after molding the light guide plate 11, and can be peeled off. In this embodiment, one second light diffusing portion 14 (left side in FIG. 1) is formed in an oval shape, and the other second light diffusing portion 14 (right side in FIG. 1) is formed in a trapezoidal shape.

Next, the operation of the lighting device 10 having the above configuration will be described with reference to FIG.
When the light source 12 is turned on and the light 3 is irradiated, the light 3 passes through the light guide plate 11. The light 3 transmitted through the light guide plate 11 hits the first light diffusing unit 13 and is diffusely reflected. The diffusely reflected light 3 propagates in the light guide plate while repeatedly reflecting on the front and back surfaces of the light guide plate 11.

A part of the light 3 diffused by the first light diffusing unit 13 and propagated in the light guide plate 11 reaches the second light diffusing unit 14, is diffusely reflected, and is emitted to the outside from the upper surface of the light guide plate 11. .. The emitted light 3 illuminates the surroundings on the upper side of the light guide plate 11. At this time, the two second light diffusing portions 14 appear to shine in an oval shape and a trapezoidal shape, respectively. Since the second light diffusing portion 14 is white with high reflectance, it can be illuminated brightly and appears to shine brightly. The light that illuminates the inside of the cup holder H is indirect light that diffusely reflects the light of the light source 12, so that it is soft light that does not easily form shadows.

In the lighting device 10, a sticker is attached to the light guide plate 11 as the first and second light diffusion portions 13 and 14, and the light guide plate 11 is guided by a simplified configuration without complicated processing. Illumination using the light plate 11 can be performed.
The first light diffusing unit 13 attached to the light guide plate 11 after molding can be arranged at any place, and for example, the light guide plate 11 can be shared with another lighting device having a different position of a light source. It can also contribute to the plan. Further, since the first light diffusing portion 13 can be peeled off from the light guide plate 11, it is possible to cope with a design change of the arrangement of the light source 12.
Since the second light diffusing portion 14 is also attached to the light guide plate 11 after molding, it can be arranged at any place and can be peeled off from the light guide plate 11, so that the place where the light is desired to be illuminated can be changed. Become.

Since the second light diffusing portion 14 appears to shine when the light source 12 is turned on, it can also be used as a pattern for decorating the bottom of the cup holder H. Depending on the shape and arrangement of the second light diffusing portion 14, various lighting modes of decorative patterns can be adopted, and the design of the certification device 10 is enhanced.
Since the second light diffusing portion 14 is a seal made of a resin film, it can be easily processed into various shapes, and the degree of freedom of the decorative pattern is increased.

Next, another embodiment of the present invention will be described. Regarding the following embodiments, only configurations different from those of the above embodiments will be described, and the same components will be designated by the same reference numerals and the description thereof will be omitted.

[Second Embodiment]
5 to 7 show a second embodiment of the present invention. In this embodiment, a decorative plate covering the light guide plate is provided on the upper surface of the light guide plate.
The decorative plate 15 is a light-shielding plate formed in an oval shape, and is formed to be slightly smaller than the light guide plate 11. The decorative plate 15 is placed on the upper surface of the light guide plate 11 and covers most of the light guide plate 11. As the decorative plate 15, a plate made of iron, elastomer, resin or the like is used.

On the decorative plate 15, lattice windows 15a and 15a are formed at locations corresponding to the second light diffusing portions 14 and 14. The frame portion of the lattice window 15a has a similar shape to the second light diffusing portion 14, and is formed to be slightly smaller than the second light diffusing portion 14.

The light diffusely reflected by the second light diffusing unit 14 and emitted from the light guide plate 11 illuminates the surroundings through the lattice window 15a. Further, the light 3 (see FIG. 4) from the light source 12 diffusely reflected by the first light diffusing unit 13 tries to go out from the upper surface of the light guide plate 11 in the process of propagating in the light guide plate 11. The light to be emitted is shielded by the decorative plate 15. As a result, the second light diffusing portion 14 that appears to shine through the lattice window 15a is made to stand out by increasing the difference in brightness with respect to the decorative plate 15, and the lattice of the lattice window 15a adds stripe decoration. Will be done. Therefore, the design of the lighting device 10 is further enhanced.

The decorative plate 15 may be formed with a window without a grid, or may be formed by punching out desired characters or figures.

[Third Embodiment]
FIG. 8 shows a third embodiment of the present invention. In this embodiment, the shape and arrangement of the second light diffusing portion are different from those in the above embodiment.
The second light diffusing portion 14 of this embodiment is formed in a star shape, and a plurality of the second light diffusing portions 14 are arranged on both side portions in the long axis direction of the light guide plate 11. When the light source 12 of the lighting device 10 is turned on, a star-shaped pattern appears on the bottom of the cup holder 1. In the lighting device 10 of this embodiment, the lighting mode with an emphasis on decorativeness is realized by the second light diffusing unit 14 that can be arranged in various shapes and can adopt various decorative patterns.

The present invention is not limited to the above embodiment, and various modifications can be adopted without departing from the gist thereof.
In the above embodiment, a resin film seal is attached to the light guide plate in order to provide the first and second light diffusing portions, but printing with ink, coating with paint, marking with a pen, vapor deposition, and sputtering are performed. , Or sticking a sheet made of paper or other material may be used. Further, roughening treatment such as blasting, etching, and electric discharge machining may be used.
In the above embodiment, one light source is used, but a plurality of light sources may be arranged at different positions.
The shape and arrangement of the second light diffusing portion is not limited to the above embodiment, and for example, the second light diffusing portion may be arranged along the outer peripheral edge portion of the surface on the back side of the light guide plate.
The light guide plate may be formed of a colored light-transmitting material.
In the above embodiment, the second light diffusing part is made white with high reflectance and illuminated brightly, but other colors having different reflectances may be adopted, for example, black with low reflectance and illuminated darkly. good.

The present invention can be applied to a lighting device including a light source and a light guide.

10 Lighting device 11 Light guide plate 12 Light source 13 First light diffuser 14 Second light diffuser

Claims (4)

Light guide plate and
The light source arranged on the back side of the light guide plate and
A first light diffusing portion provided at a position facing the light source on the front surface of the light guide plate, and a first light diffusing portion.
A second light diffusing portion provided at a position away from the first light diffusing portion on the back surface of the light guide plate is provided , and the second light diffusing portion is removable from the light guide plate. A lighting device featuring. The lighting device according to claim 1, wherein the first light diffusing unit is removable from the light guide plate. The lighting device according to claim 2, wherein at least one of the first and second light diffusing portions is formed in a sheet shape and is attached to the outer surface of the light guide plate. A lighting device for a vehicle cup holder, the cup holder has an accommodating portion having a bottom wall and a side wall, and a partition for partitioning the internal space of the accommodating portion.
The light guide plate provided at the bottom of the cup holder and
The light source arranged on the back side of the light guide plate and
A first light diffusing portion provided at a position facing the light source on the front surface of the light guide plate, and a first light diffusing portion.
A second light diffusing portion provided at a position away from the first light diffusing portion on the back surface of the light guide plate is provided.
A lighting device for a cup holder for a vehicle, wherein the light source and the first light diffusing unit are arranged so as to be shielded by the partition.

Images