JP3829638B2 - Tunnel sign - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-tunnel sign used in a tunnel.
[0002]
[Prior art]
Conventional internally-illuminated signs have a light source (mainly a fluorescent lamp) in the sign, and the entire sign emits light, thereby improving the visibility of the sign.
[0003]
Conventional guide signs in tunnels are installed along the tunnel wall surface for the purpose of guiding the exit of the tunnel or the escape passage. And there is a reflection type and an internal illumination type, and when there is a blame passage, it must be an internal illumination type.
[0004]
[Problems to be solved by the invention]
Visible signs are satisfactory when viewed from the front (normal) of the signs, but when they leave at an angle to the normals (away from the longitudinal direction of the road), the luminous intensity decreases and is visible Decreased.
[0005]
The guide sign in the tunnel is the same light emission method as the internally illuminated sign, so visibility from the front is ensured, but the driver at a distance has an angle with respect to the normal, so the sign is visible Can not do it. In addition, since the reflective type emits light by reflecting the light from the headlamp, the light is not visually recognized by the driver unless the light from the headlamp properly enters the sign.
[0006]
Therefore, in the conventional example, it is impossible to inform the driver existing at a position away from the sign that the sign is present. Further, since the purpose of the installation of the guidance sign is to make it perceived as soon as possible which exit or evacuation route is suitable, it is desirable to improve the visibility from a distance as much as possible.
[0007]
Thus, it is difficult to perceive the character information in the sign from a distance, so it is necessary to improve the attractiveness by increasing the brightness in the direction of the driver and detect the presence of the sign early. is there.
[0008]
Accordingly, an object of the present invention is to provide a sign in the tunnel that makes it easy to visually recognize the presence of the sign from a distance along the road.
[0009]
[Means for Solving the Problems]
  The sign in the tunnel according to claim 1 is a sign in the tunnel that is installed at a predetermined interval with the illuminated sign surface approximately along the wall surface in the tunnel. The light distribution of the sign against the directionIt has a sufficiently bright intensity,
A display panel for forming the marking surface; and a light source device having a light source and a light guide disposed on the back side of the display panel,
The light source device is provided with the light source so as to irradiate light with respect to a substantially road longitudinal direction of a tunnel,
The light guide is formed such that its thickness decreases as it moves away from the incident end facing the light source, and the pair of light guides are arranged so that the directions from the incident end to the tip are opposite to each other. didIs.
[0010]
    According to the sign in the tunnel of the first aspect, the presence of the sign can be easily visually recognized from a distance along the road, and the visibility of the tunnel from a distance in the longitudinal direction of the road is improved.In addition, by using the light guide, unevenness in luminance on the display surface is reduced. Furthermore, the light guide is formed so that the thickness decreases as it moves away from the incident end facing the light source, and the pair of light guides are arranged so that the directions from the incident end to the tip are opposite to each other. Therefore, the luminance unevenness can be improved and inexpensively performed without performing the back surface diffusion treatment of the light guide.
[0019]
    Claim2The tunnel sign described isIn a tunnel sign that is installed at a predetermined interval with the illuminated sign surface approximately along the wall surface in the tunnel, the light distribution of the sign is sufficiently conspicuous in the direction of a position that is approximately half the installation interval away from the sign. It is a light intensity,
A display panel for forming a sign surface, and a light source device having a light source and a light guide disposed on the back side of the display panel,
The light source device is provided with the light source so as to irradiate light with respect to a substantially road longitudinal direction of a tunnel,
  Between the display panel and the light source device, an optical member having a plurality of concave and convex portions forming groove-like irregularities is interposed, and the direction in which the concaves and convexes are continuous is set to the substantially road longitudinal direction of the tunnel.
[0020]
    Claim2According to the tunnel signs described,The presence of the sign can be easily visually recognized from a distance along the road, and the visibility of the tunnel from a distance in the longitudinal direction of the road is improved. In addition, by using the light guide, unevenness in luminance on the display surface is reduced.
[0021]
    Claim3The in-tunnel signs described are claimed2The concavo-convex shape portion has a triangular, trapezoidal, or corrugated groove shape in cross section, is formed continuously or intermittently in the depth direction of the cross section, and is disposed toward the light guide.
[0022]
    Claim3According to the tunnel sign described, the claim2Has the same effect.
[0023]
    Claim4The tunnel sign described isIn a tunnel sign that is installed at a predetermined interval with the illuminated sign surface approximately along the wall surface in the tunnel, the light distribution of the sign is sufficiently conspicuous in the direction of a position that is approximately half the installation interval away from the sign. It is a light intensity,
A display panel for forming a sign surface, and a light source device having a light source and a light guide disposed on the back side of the display panel,
The light source device is provided with the light source so as to irradiate light with respect to a substantially road longitudinal direction of a tunnel,
    The surface of the light guide on the display panel side has a plurality of concave and convex portions having groove-like concave and convex portions, and the direction in which the concave and convex portions are continuous is the substantially road longitudinal direction of the tunnel.
[0024]
    Claim4According to the tunnel signs described,The presence of the sign can be easily visually recognized from a distance along the road, and the visibility of the tunnel from a distance in the longitudinal direction of the road is improved. In addition, by using the light guide, unevenness in luminance on the display surface is reduced. furtherSince the number of parts can be reduced and the configuration is simplified, the cost can be reduced.
[0025]
    Claim5The in-tunnel signs described are claimed4The concave-convex shape portion has a triangular, trapezoidal, or corrugated groove shape in cross section, and a diffusion processing portion is provided on the opposite side of the light guide from the display panel.
[0026]
    Claim5According to the tunnel sign described, the claim4Has the same effect.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention is shown in FIGS. In FIG. 1, a plurality of in-tunnel signs 1 are installed at predetermined intervals with the illuminated sign surface 1 a approximately along the wall surface 2 in the tunnel 6. A light source is arranged on the sign 1 so that the light distribution of the sign 1 with respect to the direction A in the position P which is approximately half the installation interval S from the sign 1 is about 0.8 cd or more and about 220 cd or less. ing. If the distance G from the wall surface 2 at the position P is the angle D in the direction A is tan^-1{G / (S / 2)}.
[0028]
In this way, the luminous intensity in the direction of the position at a distance of half the installation interval of the sign 1 that is the maximum observation distance is conspicuous so that the attractiveness of the sign 1 can be obtained from the position away from the tunnel 6 in the substantially longitudinal direction of the road. I decided to make the light intensity of the level. In addition, when the luminous intensity is increased, the attractiveness is increased. However, if the luminous intensity is excessively increased, glare (glare) is caused. Therefore, the luminous intensity is suppressed to such an extent that it does not feel dazzling.
[0029]
In addition, about the brightness which is conspicuous enough and the brightness which does not feel dazzling, it computed by implementing the following experiment. That is, in the experimental environment, a light emitter is installed on an actual road at night, and a state in which the luminous intensity of the light emitter is changed is observed from 40 meters ahead on or along the road. In the evaluation analysis, the five-step evaluation of “not at all noticeable” to “very noticeable” is applied to the attractiveness, and the cumulative probability of 75% that is answered as “noticeable” or “very noticeable” is adopted. The minimum value was about 0.8 cd. For glare, a five-step evaluation of “not at all dazzling” to “dazzling and uncomfortable” was adopted, and a cumulative probability of 25% of responses that felt dazzling (in other words, a cumulative probability of 75% that was not dazzling) was adopted. The maximum value at that time was 220 cd.
[0030]
FIG. 2 shows the structure of the sign 1 in the tunnel. 1a is a marking surface, 3 is a light emitter, 4 is a window made of a resin transparent plate of the light emitter 3, 5 is a light emitting diode (LED) of the light emitter 3, 7 is a side wall forming the window 4, and 8 is a light emitter. It is a support part. A window 4 made of a transparent plate is installed in the center of the side surface of the sign 1, and a bullet-type LED, which is a light emitting body 3, is installed inside the window 4 in the longitudinal direction of the road.
[0031]
That is, the light emitter 3 is installed within the thickness portion of the sign 1 (the width of the surface substantially perpendicular to the sign surface 1a), and the light distribution characteristics of the light emitter 3 are as shown in FIG. It has a directivity in the road longitudinal direction with respect to 1a, and does not substantially emit light in the direction across the road with respect to the sign surface 1a.
[0032]
When the sign is viewed from a distance on the road, the apparent area of the sign surface 1a is small, and sufficient visibility cannot be ensured. Therefore, by providing the light emitting body 3 having directivity in the road longitudinal direction in the thickness portion of the sign 1, it is possible to ensure visibility from a distance.
[0033]
According to the first embodiment, compared to the conventional sign, it is more attractive from a distance, so it is possible for the evacuee to appropriately perceive sign information and efficiently evacuate when an accident occurs. It is.
[0034]
3 to 9 are modifications of the first embodiment.
[0035]
In the embodiment of FIGS. 3 and 4, a transparent resin window 4 is installed at the upper and lower ends of the side surface of the sign 1, and a bullet-type LED as the light emitter 3 is installed inside the window 4 in the longitudinal direction of the road. ing. FIG. 4 shows the orientation characteristics.
[0036]
In the embodiment of FIG. 5, a light guide 9 made of a transparent resin is installed at the center of the side surface of the sign 1, and a surface-mounted LED as a light emitter 3 is installed at the upper and lower ends of the light guide 9. It is.
[0037]
The embodiment shown in FIG. 6 is a sign in which a cold cathode lamp as a light emitter 3 and a reflector 10 are installed on the side face of the sign 1.
[0038]
The embodiment shown in FIG. 7 is a sign in which a fluorescent lamp as a light emitter 3 and a reflector 10 are installed on the side face of the sign 1.
[0039]
In the embodiment of FIG. 8, a substantially semi-cylindrical light emitting portion 11 is installed in the center of the upper surface and the lower surface of the sign 1, which is a combination of a transparent resin portion 11 a forming a peripheral surface and a non-transparent resin portion 11 b forming an end surface. It is a sign that has been. Inside the light emitting unit 11, a bullet-type LED that is the light emitting body 3 is installed in the longitudinal direction of the road.
[0040]
In the embodiment of FIG. 9, in FIG. 8, a bullet-type LED (3) facing upward or downward and a reflecting plate 15 that reflects in a direction along the road are installed inside the light emitting unit 11.
[0041]
A second embodiment of the present invention is shown in FIGS. This tunnel sign is roughly divided into an outer casing 20, a plate-like transparent plastic such as acrylic, glass or the like, a display panel 16, a reflective sheet 21, a light source 17 such as a lamp such as an Hf lamp. And a ballast 22 for turning on the light source 17, and an emergency battery 23. Here, the outer casing 20 has a width of 1320 mm, a length of 720 mm, and a thickness of 100 mm, and a light guide 18 having a width of 1200 mm, a length of 600 mm, and a thickness of 35 mm is installed therein, and the back surface of the light guide 18 is provided. For example, a diffusion processing unit 30 printed with a dot pattern for diffusion is formed. The reflection sheet 21 is disposed on the back surface of the light guide 18. The light source 17 is installed on the end surface of the light guide 18 in the longitudinal direction of the tunnel. A ballast 22 and a battery 23 are also housed in the housing 20.
[0042]
In this way, the marking surface 1a is formed on the display panel 16, and a light source device including the light source 17 and the light guide 18 is provided on the back surface of the display panel 16, and the light source device is substantially in the longitudinal direction of the road of the tunnel. A light source 17 is provided so as to irradiate the light.
[0043]
In this structure, light emitted from the light source 17 enters the light guide 18, and a lot of light is guided from the sign surface 1 a which is the surface of the display panel 16 toward the substantially road longitudinal direction of the tunnel. For this reason, when the light is scattered by the diffusion processing unit 30 using, for example, a dot pattern inside the light guide 18, the light is also diffused but also has directivity in the substantially road longitudinal direction of the tunnel. 18 is injected outside. That is, the light distribution is slightly reduced on the sign surface 1a of the display panel 16 as shown in FIG. 10B, but compared with the conventional road distribution characteristic shown in FIG. It has light distribution in the longitudinal direction and emits a lot of light in an oblique direction.
[0044]
This improves the visibility of the tunnel from a distance in the longitudinal direction of the road. Further, the use of the light guide 18 reduces the luminance unevenness of the display surface.
[0045]
A third embodiment of the present invention is shown in FIGS. The difference from the second embodiment is that a light emitting diode (LED) is used as the light source 17, and the light guide body is composed of a pair of light guide bodies 18a and 18b, each having a wedge shape, having a width of 600 mm, The vertical length is 600 mm and the maximum thickness is 35 mm. Two wedge-shaped light guide plates 18a and 18b are installed in such a manner that the inclined surface 25 side is the display panel 16 side and the narrower side is attached to each other, and a light source is provided on the substantially longitudinal end surface of the tunnel of the light guides 18a and 18b. 17 is installed. Others are the same as in the first embodiment.
[0046]
In this way, the in-tunnel marker 1 is formed so that its thickness decreases as the light guides 18a and 18b move away from the incident end facing the light source 17 toward the tip, and the pair of light guides 18a and 18b are connected to each other. They are arranged so that the directions from the incident end to the tip are opposite to each other.
[0047]
In this structure, the light emitted from the light source 17 enters the light guides 18a and 18b as indicated by arrows, and the angle between the light beam and the surfaces of the light guides 18a and 18b is large while being internally reflected. It will become. For this reason, the light beam becomes smaller than the critical angle and is emitted. The emitted angle is an angle close to the longitudinal direction of the tunnel. As shown in FIG. 12 (b), this light distribution has a directivity in the longitudinal direction of the tunnel, although the light distribution is slightly reduced on the sign surface 1a of the display panel 16. Give out light.
[0048]
This improves the visibility of the tunnel from a distance in the longitudinal direction of the road. Further, by using the light guides 18a and 18b, there is little luminance unevenness on the display surface. Furthermore, since it is not necessary to perform the back surface diffusion process of the light guides 18a and 18b, the cost becomes low.
[0049]
FIG. 14 to FIG. 17 are modifications of almost the same form as the structure of the sign in the tunnel of the third embodiment described above.
[0050]
14 and 15 differ only in the installation direction of the light guides 18a and 18b, the wedge-shaped inclined surface 25 is installed so as to be opposite to the display panel 16, and the inclined surface 25 is provided. A reflective sheet 21 is provided on the surface. The light distribution is the same as in the third embodiment, and a large amount of light is emitted in an oblique direction. The light source 17 may be a lamp such as a fluorescent lamp, including the third embodiment.
[0051]
The embodiment of FIGS. 16 and 17 differs from the third embodiment in that the light guides 18a and 18b have a wedge shape, for example, a width of 580 mm, a length of 600 mm, and a maximum thickness of 35 mm. . Two wedge-shaped light guide plates 18a and 18b are installed in the outer casing 20 such that the inclined surface 25 side is opposite to the display panel 16 side and the narrower side is directed toward the instrument end surface. Further, a lamp, for example, an Hf lamp is used as the light source 17, and the ballast 22 lights up. The light source 17 is installed vertically in the center of the appliance so as to be orthogonal to the longitudinal direction of the tunnel, and the light source 17 is surrounded by the thick ends of the light guides 18a and 18b. Here, a half mirror 26 is disposed on the display panel 16 side of the light sources 18a and 18b, and a reflecting plate 27 is disposed on the opposite side. For example, a half mirror 26 having a part of transmitted light is provided on the display panel 16 side of the light source 17 so as to suppress the transmitted light and eliminate a portion with high luminance on the panel surface. The light distribution characteristics are the same as in FIG. 12B, and a large amount of light is emitted in an oblique direction.
[0052]
A fourth embodiment of the present invention is shown in FIG. The difference from the second embodiment is that the surface of the light source device including the light source 17 and the light guide 18 for uniform light emission and the display panel 16 have a concavo-convex shape having a plurality of groove-shaped concavo-convex on the surface. An optical member (prism sheet) 31 having a portion is interposed, and the direction in which the projections and recesses are continuous is arranged as the irradiation direction of the light source 17. The concave-convex shape portion of the optical member is formed adjacent to each other in the form of, for example, a triangular, trapezoidal, or corrugated groove (trend). This cross-sectional shape is formed continuously or intermittently across the entire width in the depth direction of the cross section. Therefore, this embodiment is characterized in that the concave and convex shape portion of the optical member 31 is directed toward the light guide 18 and the groove shape is substantially aligned in a direction substantially orthogonal to the light irradiation direction.
[0053]
Specifically, the prism-shaped optical member 31 arranged in a triangular shape is placed between the light guide 18 and the display panel 16 with the convex portion facing the light guide 18 side. As shown in FIG. 18C, one cross-sectional shape of this prism is a base wall thickness of 0.8 mm, a width of 2 mm, and a height of 1 mm. The rest is the same as in the second embodiment.
[0054]
In this structure, the light emitted from the light source 17 enters the light guide 18 and is scattered by hitting the tont pattern 30 of the diffusion processing portion on the back surface of the light guide 18 while being repeatedly reflected inside. Of the scattered light, light that is smaller than the critical angle of the surface of the light guide 18 is emitted to the outside of the light guide 18. This light is bent in the substantially road longitudinal direction of the tunnel by the prism surface of the next optical member 31. As shown in FIG. 18 (d), this light distribution has directivity in the substantially road longitudinal direction of the tunnel although the light distribution is slightly reduced on the sign surface 1a of the display panel 16.
[0055]
This improves the visibility of the tunnel from a long distance in the longitudinal direction of the road. Further, the use of the light guide 18 reduces the luminance unevenness of the display surface.
[0056]
19 to 21 are modifications of the third embodiment.
[0057]
The embodiment of FIG. 19 differs only in the cross-sectional shape of the prism that is the optical member 31. Here, prisms having a trapezoidal cross section are arranged between the light guide 18 and the display panel 16 so that the convex portions thereof are directed toward the light guide 18. As shown in FIG. 19 (b), the cross-sectional shape of one of the prisms is a base wall thickness of 0.8 mm, a trapezoid lower side width of 2 mm, a trapezoid upper side width of 0.2 mm (in the convex direction), and a height of 0.9 mm. In the light distribution, as shown in FIG. 19C, a large amount of light is emitted in the oblique direction of the sign surface 1a, and more light is emitted in the front direction from the smooth portion at the upper end of the prism trapezoid. Since there is a lot of light in the front direction in this way, visibility can be ensured not only near the tunnel in the longitudinal direction of the road but also in the vicinity of the front direction.
[0058]
The embodiment of FIG. 20 also differs only in the cross-sectional shape of the prism. Here, between the light guide 18 and the display panel 16, the prisms of the optical member 31 in which the waveform shape is arranged are installed so that the convex portion faces the light guide 18 side. One cross-sectional shape of this prism is a base thickness of 0.8 mm, a surface shape is a sin waveform, a height (amplitude) of the lower point from the apex is 1 mm, and a lateral width of 2 mm from the apex to the lower point. In the light distribution, as shown in FIG. 20 (c), a large amount of light is emitted in the oblique direction of the sign surface 1a, and more light is emitted in the front direction from the apex portion and lower point portion of the wave portion. Similar to the nineteenth embodiment, the visibility at a short distance increases.
[0059]
The embodiment of FIG. 21 is different in the continuity in the depth direction of the cross section, not in the cross sectional shape of the prism. 21A and 21B show the optical member 31 according to the fourth embodiment, but the depth direction of the cross section is continuous. In this modified embodiment, as shown in FIGS. 21 (c) and 21 (d), the depth direction of the prism of the optical member 31 is, for example, divided into 600 mm depths in four and alternately arranged in a bowl-shaped arrangement direction every 150 mm. It has a three-dimensional shape (divided saddle shape) shifted so that the convex is located in the concave. Others are the same as in the fourth embodiment.
[0060]
A fifth embodiment of the present invention is shown in FIGS. The difference from the second embodiment is that the surface of the light guide 18 on the display panel 16 side has a plurality of concave and convex portions 33 that form concave and convex portions, and the direction in which the concave and convex portions are continuous is substantially the tunnel road. The longitudinal direction is used. In the embodiment, the concavo-convex portion 33 is a triangular, trapezoidal, or corrugated groove-shaped prism, and a plurality of adjacent prisms are formed adjacent to each other in a substantially orthogonal direction to the light irradiation direction. It is formed substantially along, and the back surface thereof is provided with a diffusion processing unit 30 such as dot printing, laser pattern, and fine processing. One cross-sectional shape of the prism has a width of 2 mm and a height of 1 mm as shown in FIG. The light source 17 has, for example, a Hf lamp parallel to the longitudinal direction of the tunnel of the light guide 18 and is installed on the end surfaces of the upper and lower light guides 18. The rest is the same as in the second embodiment.
[0061]
In this structure, the light source 17 is disposed substantially along the longitudinal direction of the road of the tunnel, and light emitted from the light source 17 enters the light guide 18 and is repeatedly reflected inside the light guide 18. Are scattered by the back surface of the diffusion processing unit 30. Of the scattered light, light that is smaller than the critical angle of the surface of the light guide 18 is emitted to the outside of the light guide 18. At this time, it is bent substantially in the longitudinal direction of the tunnel by the prism shape formed on the surface portion of the light guide 18. As shown in FIG. 24C, this light distribution has directivity in the substantially road longitudinal direction of the tunnel although the light distribution is slightly reduced on the sign surface 1a of the display panel 16.
[0062]
This improves the visibility of the tunnel from a distance in the longitudinal direction of the road. Further, the use of the light guide 18 reduces the luminance unevenness of the display surface. Furthermore, compared with the fourth embodiment, the number of members can be reduced, and the configuration is simplified, so that the cost can be reduced.
[0063]
25 and 26 are modifications of the embodiment.
[0064]
The embodiment of FIG. 25 differs only in the prism cross-sectional shape of the light guide 18. Here, the prism cross-sectional shape which is the uneven portion 33 carved on the surface of the light guide 18 is a trapezoidal shape. For example, as shown in FIG. 25 (b), the cross-sectional shape of this prism is a trapezoidal lower side width of 2 mm, a trapezoidal upper side width of 0.2 mm (in the convex portion direction), and a height of 0.9 mm. In this embodiment, not only a large amount of light is emitted in an oblique direction, but also a large amount of light is emitted in the front direction from the smooth portion at the upper end of the trapezoid, resulting in a light distribution as shown in FIG. In particular, the visibility at a short distance increases.
[0065]
The embodiment shown in FIG. 26 differs only in the prism cross-sectional shape of the light guide 18. Here, the prism cross-sectional shapes carved on the surface of the light guide 18 are arranged in a wavy shape. One cross-sectional shape of this prism has a sin waveform on the surface, and has a height (amplitude) of 1 mm from the apex to the lower point and a horizontal width of 2 mm from the apex to the lower point as shown in FIG. In this embodiment, not only a large amount of light is emitted in an oblique direction, but also a large amount of light is emitted in the front direction from the apex and lower point of the corrugated portion, so that the light distribution shown in FIG. In particular, the visibility at a short distance is improved.
[0066]
【The invention's effect】
    According to the sign in the tunnel of the first aspect, the presence of the sign can be easily visually recognized from a distance along the road, and the visibility of the tunnel from a distance in the longitudinal direction of the road is improved.In addition, by using the light guide, unevenness in luminance on the display surface is reduced. Furthermore, the light guide is formed so that the thickness decreases as it moves away from the incident end facing the light source, and the pair of light guides are arranged so that the directions from the incident end to the tip are opposite to each other. Therefore, the luminance unevenness can be improved and inexpensively performed without performing the back surface diffusion treatment of the light guide.
[0071]
    According to the sign in the tunnel according to claim 2,The presence of the sign can be easily visually recognized from a distance along the road, and the visibility of the tunnel from a distance in the longitudinal direction of the road is improved. In addition, by using the light guide, unevenness in luminance on the display surface is reduced.
[0072]
    Claim3According to the tunnel sign described, the claim2Has the same effect.
[0073]
    Claim4According to the tunnel signs described,The presence of the sign can be easily visually recognized from a distance along the road, and the visibility of the tunnel from a distance in the longitudinal direction of the road is improved. In addition, by using the light guide, unevenness in luminance on the display surface is reduced. furtherSince the number of parts can be reduced and the configuration is simplified, the cost can be reduced.
[0074]
Claim5According to the tunnel sign described, the claim4Has the same effect.
[Brief description of the drawings]
FIGS. 1A and 1B are explanatory views of a tunnel in the longitudinal direction of a tunnel in which a tunnel sign is installed according to the first embodiment of the present invention, and FIG. 1B is a light distribution characteristic diagram of the tunnel sign.
2A is a perspective view of a sign in a tunnel, and FIG. 2B is a cross-sectional view of a light emitting portion thereof.
3A and 3B show a modified embodiment, in which FIG. 3A is a perspective view of a sign in a tunnel, and FIG. 3B is a cross-sectional view of a light emitting portion thereof.
FIG. 4 is a light distribution characteristic diagram of the in-tunnel sign.
5A and 5B show a modified embodiment, in which FIG. 5A is a perspective view of a sign in a tunnel, and FIG. 5B is a cross-sectional view of a light emitting portion thereof.
6A and 6B show a modified embodiment, in which FIG. 6A is a perspective view of a sign in a tunnel, and FIG. 6B is a top view of a light emitting portion thereof.
7A and 7B show a modified embodiment, in which FIG. 7A is a perspective view of a sign in a tunnel, and FIG. 7B is a top view of a light emitting portion thereof.
8A and 8B show a modified embodiment, in which FIG. 8A is a perspective view of a sign in a tunnel, FIG. 8B is an enlarged perspective view of a light emitting portion, and FIG. 8C is a cross-sectional view of the light emitting portion.
9A and 9B show a modified embodiment, in which FIG. 9A is a perspective view of a sign in a tunnel, FIG. 9B is an enlarged perspective view of a light emitting portion, and FIG. 9C is a cross-sectional view of the light emitting portion.
10A and 10B show a second embodiment, in which FIG. 10A is a detailed cross-sectional view of a light source device portion of a sign in a tunnel, FIG. 10B is a light distribution characteristic diagram, and FIG. 10C is a conventional light distribution characteristic; FIG.
11A is a front view of a sign in a tunnel, and FIG. 11B is a cross-sectional view thereof.
12A and 12B show a third embodiment, in which FIG. 12A is a detailed cross-sectional view of a light source device portion of a sign in a tunnel, FIG. 12B is a light distribution characteristic diagram thereof, and FIG. 12C is a conventional light distribution characteristic; FIG.
13A is a cross-sectional view of a sign in a tunnel, and FIG. 13B is a partially enlarged view thereof.
FIG. 14 is a cross-sectional view of a modified light source device portion.
15A is a cross-sectional view of the sign in the tunnel, and FIG. 15B is a partially enlarged view thereof.
FIG. 16 is a cross-sectional view of a light source device portion according to another modification.
17A is a cross-sectional view of the sign in the tunnel, and FIG. 17B is a partially enlarged view thereof.
18A and 18B show a fourth embodiment, wherein FIG. 18A is a cross-sectional view of a sign in a tunnel, FIG. 18B is a partially enlarged view thereof, FIG. 18C is a partially enlarged view of its prism, and FIG. FIG.
FIGS. 19A and 19B show modified embodiments, in which FIG. 19A is a schematic partial sectional view of an optical device portion, FIG. 19B is a partially enlarged view of the prism, and FIG. 19C is a light distribution characteristic diagram;
20A and 20B show another modified embodiment, in which FIG. 20A is a schematic partial cross-sectional view of an optical device portion, FIG. 20B is a partially enlarged view of the prism, and FIG. 20C is a light distribution characteristic diagram;
FIGS. 21A and 21B show still another modified embodiment, in which FIG. 21A is a plan view of an optical member according to the fourth embodiment, FIG. 21B is a perspective view thereof, and FIG. 21C is a modified embodiment; The top view of an optical member and (d) are the perspective views.
FIG. 22 is a front view of a light guide according to a fifth embodiment.
23A is a front view of a sign in a tunnel, FIG. 23B is a transverse sectional view thereof, and FIG. 23C is a longitudinal sectional view thereof.
24A is a partially enlarged view of the light source device, FIG. 24B is a partially enlarged view of the light guide, and FIG. 24C is a light distribution characteristic diagram;
FIGS. 25A and 25B show modified embodiments, in which FIG. 25A is a partially enlarged view of the light source device, FIG. 25B is a partially enlarged view of the light guide, and FIG. 25C is a light distribution characteristic diagram;
FIG. 26 shows another modified embodiment, in which (a) is a partially enlarged view of the light source device, (b) is a partially enlarged view of the light guide, and (c) is a light distribution characteristic diagram.
[Explanation of symbols]
1 Tunnel sign
2 Wall surface
3 Light emitters
16 Display panel
17 Light source
18 Light guide
18a Light guide
18b light guide
30 Diffusion processing part
31 Optical members
31a Optical member
33 Uneven shape part

Claims (5)

In a tunnel sign that is installed at a predetermined interval with the illuminated sign surface approximately along the wall surface in the tunnel, the light distribution of the sign is sufficiently conspicuous in the direction of a position that is approximately half the installation interval away from the sign. The intensity of light,
A display panel for forming the marking surface; and a light source device having a light source and a light guide disposed on the back side of the display panel,
The light source device is provided with the light source so as to irradiate light with respect to a substantially road longitudinal direction of a tunnel,
The light guide is formed such that its thickness decreases as it moves away from the incident end facing the light source, and the pair of light guides are arranged so that the directions from the incident end to the tip are opposite to each other. tunnel label to. In a tunnel sign that is installed at a predetermined interval with the illuminated sign surface approximately along the wall surface in the tunnel, the light distribution of the sign is sufficiently conspicuous in the direction of a position that is approximately half the installation interval away from the sign. It is a light intensity,
A display panel for forming a sign surface, and a light source device having a light source and a light guide disposed on the back side of the display panel,
The light source device is provided with the light source so as to irradiate light with respect to a substantially road longitudinal direction of a tunnel,
Between said display panel light source device, a plurality of interposed an optical member having a concave-convex part forming a groove-shaped irregularities, and the tunnel in the label substantially road longitudinal direction of consecutive its uneven tunnel . 3. The tunnel according to claim 2, wherein the uneven portion has a triangular, trapezoidal, or corrugated groove shape in cross section, is formed continuously or intermittently in the depth direction of the cross section, and is disposed toward the light guide. Inside sign. In a tunnel sign that is installed at a predetermined interval with the illuminated sign surface approximately along the wall surface in the tunnel, the light distribution of the sign is sufficiently conspicuous in the direction of a position that is approximately half the installation interval away from the sign. It is a light intensity,
A display panel for forming a sign surface, and a light source device having a light source and a light guide disposed on the back side of the display panel,
The light source device is provided with the light source so as to irradiate light with respect to a substantially road longitudinal direction of a tunnel,
The display has a concave-convex part forming a plurality of groove-shaped irregularities on the panel side surface, the tunnel in the labeling direction of consecutive its irregularities substantially road longitudinal tunnel of the light guide. The sign in a tunnel according to claim 4, wherein the uneven portion has a triangular, trapezoidal, or corrugated groove shape in cross section, and a diffusion processing portion is provided on the opposite side of the light guide from the display panel.

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