JP4944817B2 - Edge light type lighting system - Google Patents

Description

  The present invention relates to an edge light type illumination device.

  Conventionally, as shown in FIG. 3 and FIG. 4, a reflecting portion 8 is provided behind the light guide material 2 into which light of the light source 3 is introduced from the side end face, and the light source 3 in the light guide material 2 is formed by the reflecting portion 8. There is known an edge-light type luminaire 1 that reflects the light on the front side so that the light can be irradiated forward from the light guide member 2 (see, for example, Patent Document 1).

  In such an edge light type lighting fixture 1, in order to ensure the brightness of irradiation light, it is required to efficiently irradiate the light of the light source 3 in the light guide material 2 forward without leakage, and the edge light type In order to eliminate luminance unevenness due to a difference in the angle at which the luminaire 1 is viewed, it is required to eliminate the finger light property of the irradiated light. For example, attempts such as FIG. 4 (a) and FIG. 4 (b) are made. Has been.

  In FIG. 4A, the diffuse transmission part 7 is provided on the back surface of the light guide material 2 to diffuse the light of the light source 3 in the light guide material 2 to eliminate finger characteristics. However, some of the diffused light that has passed through the diffusing and transmitting part 7 does not reach the reflecting part 8 disposed behind the diffusing and transmitting part 7, and the inefficiency that the entire light quantity of the light source 3 cannot be irradiated forward is pointed out. Has been.

Further, in FIG. 4B, a reflection portion 8 is provided along the back surface of the light guide material 2 so that the entire light quantity of the light source 3 in the light guide material 2 is irradiated forward without omission. However, the back surface of the light guide material 2 where light from the light source 3 in the light guide material 2 is actually reflected (the portion along which the reflecting portion 8 is aligned) is flat, and the light from the light source 3 in the light guide material 2 is diffused. Instead, the irradiated light became light with strong finger characteristics.
JP 2001-155526 A

  The present invention has been made in view of the above points, and the object of the present invention is to efficiently forward light from a light source introduced into a light guide material as light having high diffusibility and no finger light. An object of the present invention is to provide an edge light type illumination device that can irradiate.

In order to solve the above problems, the invention according to claim 1 has the following configuration. That is, it has the light guide material 2 into which the light of the light source 3 is introduced from the side end face. A diffuse transmission part 7 that diffuses the light of the light source 3 in the light guide 2 is partially provided on the back surface of the light guide 2. From a transparent plate in which a reflecting portion 8 for reflecting the light passing through the diffusing and transmitting portion 7 toward the front of the light guide material 2 is covered with the diffusing and transmitting portion 7, and a wood grain pattern 5a is attached to the front side of the light guide material 2. The light transmitting portion 5 is disposed, and a non-white base color reflecting plate 6 is disposed on the back surface side of the light guide member 2 .

According to this, the light of the light source 3 introduced into the light guide material 2 is diffused by the diffuse transmission part 7 and reflected forward by the reflection part 8 covering the diffuse transmission part 7 without leaking, that is, The light of the light source 3 introduced into the light guide member 2 can be efficiently irradiated forward as light having high diffusibility and no finger light. Further, when the light source 3 is turned off, the external light taken into the edge light illumination device 1 is reflected by the reflecting plate 6, and the grain pattern 5a overlaps with the base color 6a of the tea system as the background. A tone appearance appears. On the other hand, when the light source 3 is turned on, the light from the light source 3 is radiated forward from the front surface of the light guide material 2 without loss, and a building part such as a wall surface on which the illuminated building panel material 1a is installed shines. Function as. Also, the woodgrain appearance is that the external light of the base color 6a reflected by the reflector 6 appears by illuminating the woodgrain pattern 5a from the back side, and the display object appears as if it is a backlight. Such self-luminous property can be provided, and it appears to be relatively bright and conspicuous. Furthermore, since the base color 6a and the wood grain pattern 5a of the reflector 6 constituting the woodgrain appearance are shifted in the front and back directions by the thickness of the light guide material 2, a three-dimensional appearance with depth. Therefore, it can be provided with a high design that brings out the texture of solid wood with irregularities. Further, the light guide pattern 4 provided with the reflection portion 8 is attached to the back surface of the light guide material 2 and the function of reflecting the light of the light source 3 on the reflection plate 6 is eliminated. The reflecting plate 6 provided with the non-white base color 6a could be used. That is, the degree of freedom in design of the reflecting portion 8 that appears in the appearance when the light source 3 is turned off can be improved, and the above-described woodgrain appearance can be realized.

In the present invention, the light of the light source introduced into the light guide material can be efficiently irradiated forward as light having high diffusibility and no finger light .
In addition, when the light source is turned off, the external light taken into the edge light type illumination device is reflected by the reflector, and the wood grain appearance appears such that the wood pattern is superimposed on the base color of the tea system as the background Is done. On the other hand, when the light source is turned on, the light from the light source is irradiated forward from the front surface of the light guide material without loss, and functions as an illuminating device that illuminates a building location such as a wall surface on which a building panel with illumination is installed. Further, the wood-tone appearance can be provided with a self-luminous property that makes a display object appear in the appearance with a backlight, and appears to be relatively bright and conspicuous. Furthermore, it can be provided with a high design property that brings out the texture of solid wood. Furthermore, the degree of freedom in the design of the reflective portion appearing in the appearance when the light source is turned off can be improved, and the wood grain appearance as described above can be made possible.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  The edge light type illumination device 1 of this example is a plate-like illumination device having a light guide material 2 into which light of a light source 3 is introduced from the side end face as shown in FIG. The light from the light source 3 in the light material 2 is emitted by uniformly illuminating the entire front surface of the light guide material 2 by a light distribution pattern corresponding to the light guide pattern 4 provided on the back surface of the light guide material 2. It is intended to be irradiated in front of.

  Here, the light source 3 can be composed of a straight tube fluorescent lamp or a linear light source formed by arranging a large number of LEDs in a line. Further, a colorless and transparent acrylic plate can be suitably used as the light guide material 2. In the figure, reference numerals 5 and 6 denote a light transmission part and a reflection plate provided as required for the use of the edge light type illumination device 1.

  The light guide pattern 4 of this example is formed by printing on the back surface of the light guide material 2, and uses a diffusion transmission type ink 7a that diffuses and transmits light, and a light reflection type ink 8a that reflects light. It is done. Specifically, the diffuse transmission type ink 7a is first attached to the back surface of the light guide material 2, and then the light reflection type ink 8a is attached so as to cover the diffusion transmission type ink 7a. The diffuse transmission type ink 7 a and the diffusion transmission type ink 7 a are partially provided on the back surface of the light guide material 2 because the light guide pattern 4 is formed.

  The longitudinal section of the edge light type illumination device 1 having the light guide pattern 4 is as shown in FIG. 1B. As can be seen from this figure, the light is partially diffused and transmitted through the back surface of the light guide material 2. A diffusing and transmitting portion 7 made of mold ink 7 a is provided alongside, and a reflecting portion 8 made of light reflecting ink 8 a is provided so as to cover the diffusing and transmitting portion 7.

  In the edge light type illumination device 1 of the present example having the above configuration, the light of the light source 3 introduced into the light guide member 2 is diffused by the diffusing and transmitting unit 7 and is not leaked, and the reflecting unit 8 covers the diffusing and transmitting unit 7. In other words, the light from the light source 3 introduced into the light guide member 2 can be efficiently irradiated forward as light having high diffusibility and no finger light. Therefore, in the edge light type lighting fixture 1 of this example, the light quantity of the light source 3 irradiated forward from the light guide member 2 can be made bright and bright, and luminance unevenness due to a difference in the angle at which the edge light type lighting fixture 1 is viewed. Was able to be eliminated.

  Specifically, the light of the light source 3 in the light guide member 2 that has passed through the diffuse transmission part 7 is reflected at the boundary surface 9 with the reflection part 8 in the diffuse transmission part 7 (that is, the outer surface of the diffuse transmission part 7). However, the outer surface of the diffuse transmission part 7 composed of the diffusion transmission type ink 7a solidified in the form of water droplets from the surface tension is curved (non-planar), and can diffusely reflect the light. In this respect as well, it has been attempted to improve the light diffusibility and eliminate the finger light property.

  By the way, the edge light type illuminating device 1 of the present example can be suitably used as a light-emitting display board such as a lighting-equipped building panel material 1a and an emergency exit guide light.

  When the edge light type lighting device 1 of this example is used as the lighting-equipped building panel material 1a as shown in FIG. 2A, for example, the light transmitting portion 5 is formed of a transparent plate with a wood grain pattern 5a. The reflector 6 can be configured by including a base color 6a of a non-white system (specifically, a tea system) as a base color of wood. Here, when the light source 3 is not emitting light when the light source 3 is OFF, the reflecting plate 6 is taken into the device 1 from the front side through the transparent portion 5b of the light transmitting portion 5 as shown in FIG. 2B. It has only the function of reflecting outside light forward.

  This lighting-equipped building panel material 1a is a woodgrain panel that can be used as a wall surface material or a ceiling surface material. Specifically, when the light source 3 is extinguished, external light taken into the edge light type lighting device 1 Is reflected by the reflecting plate 6, and a wood grain appearance appears such that the wood grain pattern 5 a overlaps the base color 6 a of the tea system as the background. On the other hand, when the light source 3 is turned on, the light from the light source 3 is radiated forward from the front surface of the light guide material 2 without loss, and a building part such as a wall surface on which the illuminated building panel material 1a is installed shines. It is supposed to function as.

  Here, the above-mentioned woodgrain appearance is that the external light of the base color 6a reflected by the reflecting plate 6 appears by illuminating the woodgrain pattern 5a from the back side, and the display object appears as if it is a backlight. It is possible to provide such self-luminous property, and it appears to be relatively bright and conspicuous. Furthermore, since the base color 6a and the wood grain pattern 5a of the reflector 6 constituting the woodgrain appearance are shifted in the front and back directions by the thickness of the light guide material 2, a three-dimensional appearance with depth. Therefore, it can be provided with a high design that brings out the texture of solid wood with irregularities.

  In the first place, as shown in FIG. 4A, the edge light type illumination device 1 originally has the function of reflecting the light of the light source 3 on the reflection plate 6, that is, the reflection portion 8 is configured. As the reflecting plate 6 constituting such a reflecting portion 8, it is necessary to use a reflecting plate with a white base color 6 a that easily reflects light. However, in the edge light type illumination device 1 of the present example, the light guide pattern 4 provided with the reflection portion 8 is attached to the back surface of the light guide material 2 to eliminate the function of reflecting the light of the light source 3 on the reflection plate 6. Thus, the reflecting plate 6 provided with a non-white base color 6a such as a tea system as a base color of wood could be used. That is, the degree of freedom in design of the reflecting portion 8 that appears in the appearance when the light source 3 is turned off can be improved, and the above-described woodgrain appearance can be realized.

  Moreover, when using the edge light type illuminating device 1 of this example as display boards, such as an emergency exit guide light, the light transmissive part 5 can be comprised with the transparent board which attached | subjected the guidance signs, such as the arrow which points to an emergency exit, for example. . Even if the light source 3 is turned off for some reason, the guide sign can be displayed on the appearance in a relatively conspicuous manner by floating from the base color 6a by the self-luminous property, so that the function as a guide light can be secured, which is preferable.

BRIEF DESCRIPTION OF THE DRAWINGS It is an edge light type illuminating device of the example of embodiment of this invention, (a) is an exploded side view, (b) is an expanded sectional view of the principal part. It is the example which used the edge light type illuminating device same as the above as a panel material for building with illumination, (a) is a disassembled perspective view, (b) is sectional drawing explaining the state at the time of light source extinction. It is a front view of the edge light type illuminating device of the example of a prior art. (A) (b) is sectional drawing of the principal part of the edge light type illuminating device of the other example of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Edge light type illuminating device 2 Light guide material 3 Light source 4 Light guide pattern 5 Light transmissive part 6 Reflector 7 Diffuse transmissive part 7a Diffuse transmissive ink 8 Reflector 8a Light reflective ink 9 Boundary surface

Claims (1)

It has a light guide material into which light from the light source is introduced from the side end surface, and a diffusion transmission part is provided along the back surface of the light guide material to partially diffuse the light of the light source in the light guide material. A reflection part that reflects the light passing through the front of the light guide material is covered on the diffuse transmission part, and a light transmission part made of a transparent plate with a wood grain pattern is arranged on the front side of the light guide material, An edge light type illumination device , wherein a non-white base color reflector is disposed on the back side of a light guide material .