JP2002343119A - Illumination equipment and light distribution control panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide illumination equipment and a light distribution control panel which can control efficiently light distribution cross-section of the illumination equipment into a narrow angle. SOLUTION: In the illumination equipment equipped with light sources 1 and the light distribution control panel 3 equipped in light emitting openings 2 of the light sources 1, the light distribution control panel 3 has two or more straight prisms 4 of adjoined mostly parallel, and the convex parts of each prisms 4 are arranged to a light incidence face side. The prisms are specified, for example, to have a triangle-shape section and the top angle triangle of about 105 deg. to about 130 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device and a light distribution control panel. More specifically, the present invention relates to a prism panel that controls the light distribution of a lighting device efficiently to a narrow angle for lighting devices in general.

[0002] The target device of the present invention includes a lighting device in which a light source unit and a light emitting unit are separated, or a lighting device incorporating the lighting device as a light source. For example, a hollow light guide type road light 500 (FIG. 55), a handrail lighting 50
1 (FIG. 56), a sign / signboard lamp 502 (FIG. 57), and the like. 503 is a light source and 504 is a light guide plate.

[0003] In addition to the above-mentioned lighting equipment, sign and sign lights (FIG. 5) are used as lighting equipment that can be expected to improve performance or function by controlling the light distribution of the light source unit.
8) and a fluorescent lighting device (FIG. 59). 505 is a rod-like light source such as a fluorescent lamp, 506 is a reflecting mirror, and 507 is a light guide plate.

[0004]

2. Description of the Related Art A conventional light distribution control method for each lighting fixture will be described below. Light distribution control of conventional lighting equipment is mainly performed using a reflector, a reflector, and a louver. For example, FIG.
Numeral 0 denotes a square appliance, which controls the light distribution with a louver.
1 is a gutter-like device for controlling light distribution with a louver, FIG. 62 is a gutter-like device for controlling light distribution with a reflector, FIG. 63 is a spotlight for controlling light distribution with a reflecting mirror, and FIG. 64 is a downlight for reflecting mirror. In FIG. 65, the light distribution is controlled by a light projector and a reflecting mirror.

[0005] The problem of this conventional example is that if light distribution control of a square type or gutter-like device is performed at a narrow angle using a louver, the efficiency of the device becomes extremely poor. Also, it is difficult to control narrow-angle light distribution of a square type or gutter-like device using only a reflector.
When narrow-angle light distribution control is performed on a lighting device such as a spotlight, a downlight, and a floodlight by a reflecting mirror shape, the efficiency of the device becomes extremely poor.

As another conventional example, as shown in FIGS. 66 and 67, for example, there is a hollow light guide lighting device, and the light distribution is controlled by changing the opening angle of a light emitting portion. Conventional narrow-angle light distribution control is performed by setting the aperture angle to approximately 60 ° as shown in FIG. 66 (a) to FIG. 66 (b).

However, a light guide having an opening angle of approximately 60 ° can achieve a narrow angle light distribution to some extent, but severe light distribution control cannot be performed only by the opening angle. In order to further narrow the angle, it is necessary to make the aperture angle smaller,
Since the opening area is small, the efficiency is low.

[0008] The basic structure of such a hollow light guide lighting device has a light source section 510 and a light emitting section 511 as shown in FIGS. 68 and 69, for example.

The light source section 510 mainly includes a lamp and a reflecting mirror, and the light emitting section 511 efficiently emits light from the lamp.
The light distribution is controlled by the shape of the reflector for introduction.

The basic structure of the light emitting section 511 includes an outer tube 512, a reflector film 513, an extractor film 514, and a light guide film 515. 516 is an opening.

The outer tube 512 is a transparent or milky white plastic pipe, and is generally made of polycarbonate or acrylic resin. The reflector film 513, which is a reflector, controls the light distribution of the emitted light, and a material having a high reflectance is generally used. For example, a high-reflection white PET film (Lumirror manufactured by Toray Industries, Inc.) or silver Evaporated films are used. The extractor film 514, which is a reflecting material, is for controlling the amount of light emitted from the hollow light guide in the length direction. As a material, a white material having a high diffuse reflectance is generally used. For example, high reflection white PET
Film (Lumirror manufactured by Toray Industries, Inc.) is used. Light is emitted from the hollow light guide from a portion not covered with the reflector film.

[0012]

As described above, in the prior art, when the light distribution is controlled at a narrow angle, the efficiency of the apparatus becomes very poor. In a hollow light guide lighting device, narrow angle light distribution control is the only method of reducing the opening angle, and light distribution control is difficult and inefficient.

Accordingly, an object of the present invention is to provide a lighting device and a light distribution control panel that can efficiently control the cross-sectional light distribution of the lighting device to a narrow angle.

[0014]

According to a first aspect of the present invention, there is provided an illumination apparatus including a light source and a light distribution control panel provided at an emission opening of the light source. These linear prisms are arranged substantially adjacent to each other and are juxtaposed, and the projections of each prism are arranged on the incident surface side.

According to the illumination device of the first aspect, the light distribution can be efficiently controlled to a narrow angle by the prism function of the light distribution control panel.

According to a second aspect of the present invention, in the first aspect, the prism has a triangular cross section, and the apex angle of the triangular shape is specified to be approximately 105 ° to approximately 130 °.

According to the illumination device of the second aspect, the same effect as that of the first aspect is obtained.

According to a third aspect of the present invention, in the first aspect, the prism has a curved cross section having a convex cross section.

According to the illumination device of the third aspect, the same effect as that of the first aspect is obtained.

According to a fourth aspect of the present invention, in the first aspect, the prism has a concave curved shape in cross section.

According to the lighting device of the fourth aspect, the same effect as that of the first aspect is obtained.

According to a fifth aspect of the present invention, in the third or fourth aspect, the prism has an elliptical cross section.

According to the illumination device of the fifth aspect, the same effect as that of the first aspect is obtained.

According to a sixth aspect of the present invention, in the third or fourth aspect, the prism has an arc-shaped cross section.

According to the illumination device of the sixth aspect, the same effect as that of the first aspect is obtained.

According to a seventh aspect of the present invention, in the first aspect, when the light source has directivity in the incident direction, the cross section of each prism is asymmetric.

According to the illuminating device of the seventh aspect, in addition to the same effects as those of the first aspect, the prism surface on the incident side is made more precise, and the shape on the side opposite to the incident direction requires that the prism surface be so precise. Therefore, it is possible to drastically reduce costs when preparing a mold and a prism panel.

According to an eighth aspect of the present invention, in the first aspect, the illuminating device is a light guide type indicator lamp having a light guide panel, and a light distribution control panel is provided between the light source and the light guide panel. It is arranged.

According to the illumination device of the eighth aspect, in addition to the same effects as those of the first aspect, the light guide loss can be reduced by controlling the light incident on the light guide plate at a narrow angle.

According to a ninth aspect of the present invention, in the first aspect, the illuminating device is a hollow light guide luminaire.

According to the lighting device of the ninth aspect, the same effect as that of the first aspect is obtained.

A lighting device according to a tenth aspect is the illuminating device according to the ninth aspect, wherein the lighting device is a light guide for column lighting.

According to the illumination device of the tenth aspect, the same effect as that of the first aspect is obtained.

The lighting device according to claim 11 is the lighting device according to claim 10.
, The lighting device is for a road, and a plurality of emission openings are provided in one lighting device to illuminate a plurality of lanes.

According to the illuminating device of the eleventh aspect, in addition to the same effects as those of the first aspect, it is possible to irradiate a wide road surface uniformly and to control the light distribution for each opening, so that it is possible to irradiate only the road surface. By cutting the light upward, light pollution countermeasures can be taken.

According to a twelfth aspect of the present invention, in the ninth aspect of the present invention, in the ninth aspect, the illuminating device is a tunnel lamp having a plurality of exit openings, and is installed above a center of a plurality of lanes, and a road is provided from the plurality of exit openings. Is irradiated.

According to the lighting device of the twelfth aspect, in addition to the same effect as the first aspect, the uniformity of the road surface can be improved.

According to a thirteenth aspect of the present invention, in the ninth aspect, the illuminating device is a road sign light guide device.

According to the illumination device of the thirteenth aspect, in addition to the same effect as the first aspect, the light distribution of the light emitted from the light guide can be controlled to a narrow angle, so that the uniformity of the luminance of the display surface is improved. However, it is possible to increase the length of the display surface in the emission light direction.

According to a twelfth aspect of the present invention, in the illuminating device according to the ninth aspect, the light guide has a groove on an outer periphery thereof, and the light distribution control panel is attached to the groove.

According to the illumination device of the fourteenth aspect, in addition to the same effect as the first aspect, the light distribution control panel is configured to be freely replaceable, so that the light is emitted without changing the size of the opening. Variations in light distribution can be provided.

According to a fifteenth aspect of the present invention, the light distribution control panel has a triangular cross section, and the apex angle of the triangular shape is approximately 105 ° to approximately 130 °.
A plurality of prisms defined in degrees are arranged substantially adjacent to each other.

According to the light distribution control panel of the fifteenth aspect, the same effect as that of the first aspect can be obtained.

17. The light distribution control panel according to claim 16, wherein a plurality of curved prisms having a convex cross section are arranged substantially adjacent to each other.

According to the light distribution control panel of the sixteenth aspect, the same effect as that of the first aspect can be obtained.

The light distribution control panel according to a seventeenth aspect is characterized in that a plurality of prisms each having a concave curved section are arranged substantially adjacent to each other.

According to the light distribution control panel of the seventeenth aspect, the same effect as that of the first aspect can be obtained.

The light distribution control panel according to claim 18 is the light distribution control panel according to claim 16 or 17, wherein the cross section is elliptical.

According to the light distribution control panel of the eighteenth aspect, the same effect as that of the first aspect can be obtained.

A light distribution control panel according to a nineteenth aspect is the light distribution control panel according to the sixteenth or seventeenth aspect, wherein the cross section has an arc shape.

According to the light distribution control panel of the nineteenth aspect, the same effect as that of the first aspect can be obtained.

A light distribution control panel according to a twentieth aspect of the present invention is a light distribution control panel in which a plurality of linear prisms are arranged substantially adjacently and side by side, and a convex portion of each prism is arranged on an incident surface side.
The cross section of each prism has an asymmetric shape.

According to the light distribution control panel of the twentieth aspect, the same effect as that of the seventh aspect can be obtained.

[0054]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described with reference to FIGS. This lighting device is a lighting device including a light source 1 and a light distribution control panel 3 provided in an emission opening 2 thereof. In the light distribution control panel 3, the linear prisms 4 are arranged with the projections 4a on the incident surface side, and the linear prisms 4 are arranged substantially adjacent to each other. The cross section of the linear prism is, for example, a triangular shape, in particular, an isosceles triangular shape (geometrically a pentagon as shown in the figure), and the prism material is made of a resin material such as acryl, polycarbonate, pet, or a glass material. .

The light distribution control panel 3 is disposed in the opening 2 of the lighting fixture such that the uneven portion of the prism panel 3 is on the light incident surface side. The lighting device is square or gutter-shaped, and a light distribution control panel 3 is
And the lamp axis are parallel. The light distribution in the sectional direction parallel to the lamp axis is controlled to a narrow angle by the prism panel. Light distribution control in a cross-sectional direction perpendicular to the lamp axis is controlled by a normal reflector 11 in the fixture. Reference numeral 10 denotes an apparatus main body, which is used for office use.

According to the first embodiment, it is possible to control the light distribution in the cross-section direction perpendicular to the lamp axis, that is, the cross-section in the axial direction of the prism, to a narrow angle. It is possible to increase the efficiency of the device for narrow-angle light distribution control. In addition, there is an effect of glare cut on a computer screen as an office lighting fixture. Compared with the conventional louver glare cut, the fixture efficiency is higher and the illuminance immediately below the fixture increases.

FIG. 3 shows a variation of the light distribution control panel, in which the entire panel is curved rather than flat. Although the convex side of the prism is curved so as to be convex, it may be curved so as to be concave.

FIG. 4 shows a case where the lighting device is a floodlight,
Although the light distribution control panel 3 is arranged, since the emission opening 2 is an R-shaped instrument, the prism panel 3 may be cut and arranged so as to match the diameter of the opening 2. The same applies to the case where the present invention is applied to a downlight and a spotlight.

A second embodiment of the present invention will be described with reference to FIGS. That is, in the first embodiment, the cross section of each prism 4 of the light distribution control panel 3 is triangular, and for example, the apex angle of an isosceles triangular shape is approximately 105 ° to approximately 13 °.
It is defined as 0 °.

FIGS. 6 to 9 show light distribution simulation data using an isosceles triangular prism panel having an apex angle of 100 ° to 130 °. In each figure, φ = 0: a section orthogonal to the prism axis direction, φ = 45: a section at 45 ° to the prism axis direction, and φ = 90: a section parallel to the prism axis direction. FIG. 6A shows a case where the apex angle is 100 °.
7A shows a case where the apex angle is 110 °, FIG. 7A shows a case where the apex angle is 110 °, FIG. 7B shows a case where the apex angle is 115 °, FIG. b) is a vertical angle of 125 °,
FIG. 9 shows the case where the apex angle is 130 °.

From the above simulation data, the light distribution can be controlled to the narrowest angle when the apex angle is approximately 105 °. As the apex angle increases from approximately 105 ° to approximately 130 °, the light distribution tends to gradually spread, but the efficiency increases. Further, when the apex angle becomes approximately 100 °, light is not emitted to a section of φ = 90 °. This is the same tendency even when the apex angle is nearly 90 °.

A third embodiment of the present invention will be described with reference to FIG. That is, in the first embodiment, the light distribution control panel 3 includes a prism 4 having a convex cross section and a curved shape.
Are arranged substantially adjacent to each other.

A fourth embodiment of the present invention will be described with reference to FIG. That is, in the first embodiment, the light distribution control panel 3 includes a prism 4 having a concave cross section and a curved shape.
Are arranged substantially adjacent to each other. Specifically, prism 4
Has a curved shape in which both sides are high and the center is concave.

A fifth embodiment of the present invention will be described with reference to FIGS. That is, in the third embodiment and the fourth embodiment, the convex or concave cross section of each prism 4 is made elliptical. FIG. 12 (a), FIG.
12B shows a case of a convex cross section, and FIGS. 12C and 12D show a case of a concave cross section. (A) to (d) show the case where one prism is used and the case where two prisms are used. The ratio of the major axis a to the minor axis b of the ellipse is shown in FIG. 12 (a) or FIG. 12 (c).
Approximately 1 <a / b <approximately 2. The angle α between both sides of the convex or concave as viewed from the center of the ellipse is shown in FIG.
As shown in FIG. 2 (d), the angle is made smaller than 180 °. α = approximately 1
80 ° is the most effective. FIG. 13 shows an elliptical convex and concave prism panel (a: b = 2: 1, α = 18).
0) using light distribution simulation data (φ = 9
0).

According to this embodiment, the narrow-angle light distribution control can be performed for both the convex shape and the concave shape, but the light distribution control can be performed for the convex-shaped prism panel at a narrower angle. Conversely, a concave prism panel is efficient. Therefore, the light distribution control can be performed efficiently at a narrow angle as compared with the light distribution control of the conventional method of the light guide.

A sixth embodiment of the present invention will be described with reference to FIGS. That is, in the third and fourth embodiments, the convex or concave cross section of each prism 4 has an arc shape. FIG. 14 (a), FIG.
15B shows a case of a convex cross section, and FIGS. 15C and 15D show a case of a concave cross section. (A) to (d) show the case where one prism is used and the case where two prisms are used.

The center angle α of the arc is shown in FIGS.
As shown in (d), it is smaller than 180 °. α = about 18
0 ° is the most effective.

FIG. 15 shows light distribution simulation data (φ = 90) using arc-shaped convex and concave prism panels (α = 180).

According to this embodiment, narrow-angle light distribution control can be performed for both the convex shape and the concave shape, but the light distribution control can be performed for the convex prism panel at a narrower angle. Conversely, a concave prism panel is efficient. In this manner, light distribution control can be performed efficiently at a narrow angle, compared to the light distribution control of the conventional method of the light guide.

A seventh embodiment of the present invention will be described with reference to FIG. That is, in the first embodiment, when there is directivity in the incident direction of the light source, the cross section of each prism 4 has an asymmetric shape.

FIG. 16A shows the case where the asymmetric shape of the prism 4 is triangular, FIG. 16B shows the case where the light distribution control panel 3 is formed by arranging a plurality of prisms 4, and FIG. The case where the direction is substantially parallel to the arrangement direction of the prisms 4 is shown.

For example, in the case where there is directivity in the light incident direction as in the case of a light guide lighting device, the light distribution control similar to that of the symmetric prism can be performed by forming only the side surface on which the light is incident into a light distribution control prism shape. It is possible. Since the shape on the side opposite to the incident direction does not require much accuracy, it is possible to greatly reduce the cost when manufacturing a mold and a prism panel.

FIGS. 17 and 18 show modifications of the light distribution control panel 4. FIG. 17 shows a case where the asymmetric shape of the prism is convex, and FIG. 18 shows a case where the asymmetric shape of the prism is concave.

An eighth embodiment of the present invention will be described with reference to FIG. That is, in the first embodiment, the luminaire has a square shape or a gutter shape, and the light distribution control panel 3 is installed in the opening 2 such that the axis of the prism 4 is orthogonal to the lamp axis.

According to this embodiment, it is possible to control the light distribution in the cross-section direction perpendicular to the lamp axis, that is, in the cross-section perpendicular to the prism axis, to a narrow angle. It is possible to increase the efficiency of the device with respect to the angular light distribution control.

A ninth embodiment of the present invention will be described with reference to FIGS. That is, in the present embodiment, the device in which the light distribution control prism panel 3 is disposed is used for illumination of a tunnel light. 20 is a tunnel,
21 is a lighting fixture, 22 is a light distribution. The light distribution in the cross-sectional direction perpendicular to the lamp axis is controlled to a narrow angle by the prism panel. The lamps for this fixture include fluorescent, NH, multi-halogen,
HID is used. This device is effective for single or multiple lights. FIG. 21 shows the case of one lamp, but the prism axis and the lamp axis are orthogonal to each other. In the case of two lamps, for example, one having the same configuration as the light distribution control panel used for the lighting fixture of FIG. 19 is used.

According to this embodiment, by controlling the light distribution at a narrow angle, it is possible to irradiate only the road surface, thereby increasing the road surface luminance. Therefore, it leads to an energy saving effect. Further, the efficiency is higher than that of the conventional louver type light distribution control. Since the light distribution can be changed depending on the shape of the prism, the position to be installed in the tunnel can be freely determined.

A tenth embodiment of the present invention will be described with reference to FIG. That is, in the present embodiment, the device in which the light distribution control prism panel 3 is arranged is used for a row lighting. Reference numeral 23 denotes a row lighting fixture mounted on the wall surface 24 at a height of about 0.5 m to 2 m from the road surface 26. The direction of the light distribution control panel 3 with respect to the lamp is shown in FIGS.
Is the same as Thus, the light distribution 25 in the cross-sectional direction perpendicular to the lamp axis is controlled to a narrow angle by the prism panel.
A fluorescent lamp, NH, multihalogen, and HID are used for the lamp of this device. This device is effective for single or multiple lights.

According to this embodiment, the road surface brightness can be increased by irradiating only the road surface 26 by performing the narrow-angle light distribution control. Therefore, it leads to an energy saving effect. Further, the efficiency is higher than that of the conventional louver type light distribution control. Further, by cutting off the light distribution in the upward direction, light pollution can be reduced.

An eleventh embodiment of the present invention will be described with reference to FIGS. That is, in the first embodiment, the illuminating device is a light-guiding indicator light fixture.
As shown in FIG. 23, the conventional light guide type high-brightness induction lamp includes a cold cathode lamp 30 whose back surface is covered with a reflector 30a, a light guide plate 31, and a diffuse reflection sheet 32. 33 is a display surface. As shown in FIG. 24, a light distribution control prism panel 3 is arranged between a cold cathode lamp 30 serving as a light source unit and an incident end of a light guide panel, that is, a light guide plate 31. The prism is arranged such that the prism axis is orthogonal to the lamp axis.

According to this embodiment, the light guide loss can be reduced by controlling the light incident on the light guide plate 31 at a narrow angle. Therefore, the brightness of the display surface can be increased. If the brightness of the display surface can be increased, the lamp current of the cold cathode lamp can be reduced in order to obtain the same brightness as the conventional one, and the life of the lamp is greatly extended.

As a modification of this embodiment, a configuration in which the light guide plate is removed is possible. That is, if a narrow-angle light distribution can be realized at the incident portion, uniform light emission can be achieved only with the diffuse reflection sheet 32 on the rear surface without using the light guide plate 31. For this reason, the cost reduction and the weight reduction of the apparatus can be realized by reducing the light guide plate 31.

A twelfth embodiment of the present invention will be described with reference to FIGS. 26 and 27. That is, in the first embodiment, the lighting device is a hollow light guide lighting device. Reference numeral 35 denotes a light source, and reference numeral 36 denotes a hollow light guide having an emission opening 37 in the axial direction. Then, the narrow-angle light distribution prism panel 4 similar to that of the first embodiment is arranged in the emission opening 37. More specifically, the prism panel 3 is placed with the uneven surface (prism surface) of the prism 4 inside the flat surface of the prism panel 3 so that the prism axis is substantially 90 ° direction, that is, orthogonal to the longitudinal direction (optical axis) of the light guide. It is arranged in the opening 37 so as to be inorganic.

According to this embodiment, it is difficult to control the light distribution at a narrow angle by the conventional method. However, by using the product of the present invention, it is possible to control the light at a narrow angle compared to the conventional light guide light control method. Light distribution can be controlled with high emission, that is, with high efficiency. In addition, efficient light distribution control in multiple directions is possible. In particular,
For highway lighting applications, it is possible to cut the upward light distribution, which has conventionally been a bottleneck, and more efficiently illuminate the road surface. Therefore, for example, if a light guide lighting device is used as road lighting, it is possible to uniformly illuminate a wide road surface width.

FIG. 27 shows a case where there are a plurality of exit apertures.
Each has a light distribution control panel 4.

A thirteenth embodiment of the present invention will be described with reference to FIGS. That is, in the twelfth embodiment, a schematic diagram of the configuration of the hollow light guide in which the light distribution control prism panel 3 is arranged is shown in FIG. 40 is an outer shell, 41 and 42 are reflection sheets, and 43 is a light guide prism sheet. In the hollow light guide on which the light distribution control panel 3 is arranged, the opening angle θ of the irradiation opening 37 is 5-18.
0 ° is desirable. In this embodiment, the angle is set to approximately 60 °. The diameter φ of the light guide is desirably 30 mm to 400 mm, but in the present embodiment, the diameter φ is 150 mm. The light distribution control prism panel 3 is provided in the above embodiment (claims 2 to 7).
Is preferable. In this embodiment, a triangular prism according to claim 2 is used. Further, in the present embodiment, as shown in FIG. 29, the panel 3 of the prism 4 in which the apex angle α of the triangular prism is set to approximately 110 ° is used. As described above, the light distribution control panel 3 is arranged such that the flat surface of the prism faces outward in the direction in which the prism axis is orthogonal to the optical axis (longitudinal direction).

FIG. 30 shows the light distribution characteristics of the above light guide.

According to this embodiment, by using this light guide configuration, a narrow-angle light distribution and high emission can be realized as compared with a conventional light guide. In this embodiment, the emission amount is increased by about 1.5 times as compared with the performance of the conventional light guide.

A fourteenth embodiment of the present invention will be described with reference to FIGS. That is, this lighting device
In the first embodiment, a light distribution control panel is used for a high-row lighting light guide.

A hollow light guide lighting device 54 having the light distribution control panel 3 is arranged on a railing, a wall surface, and near a median strip of a road. 55 is a road surface. In the present embodiment, it is installed on the wall railing section 50. Installation height H is 0.7m ~
2.5 m is desirable, but in this embodiment, the height H = 1.2 m
Was installed in the railing section 50.

In the hollow light guide 36 arranged for a road, as shown in FIG. 32A, the opening angle θ of the irradiation opening is preferably 5 to 120 °, but in the present embodiment, it is approximately 45 °. did. The diameter φ of the light guide 36 is 50 mm
~ 200 mm is desirable. In this embodiment, φ = 150 m
m. The light distribution control prism panel 3 desirably has the prism shape described in each of the above embodiments (corresponding to claims 2 to 7). In the present embodiment, a concave curved prism according to claim 4 is used. The light distribution control panel 3 is arranged so that the flat surface of the prism faces outward in a direction perpendicular to the prism axis with respect to the optical axis (longitudinal direction). The installation angle β of the road light guide is 30 as shown in FIG.
Although it is desirable to set the angle β to 79 °, in the present embodiment, β is set to 79 °.

FIG. 33 shows the light distribution characteristics of the above light guide.

In addition, the result of the study on a one-lane (3.75 m) road shows that the road surface uniformity (minimum luminance / maximum luminance) is 0. 55 for a light guide with a light distribution control panel. It was 76. The road surface average illuminance is 26 (lx) for a conventional light guide, while 35 (lx) for a light guide having a light distribution control panel.
Met.

According to this embodiment, the road surface is irradiated with narrow-angle, high-output light emitted from the hollow light guide. By using the configuration of this light guide lighting device, it is possible to control the light distribution with a narrow angle light distribution and a high emission,
For example, if this light guide lighting device is used as road lighting, a wider road surface width can be uniformly radiated than conventional light guide lighting. In addition, since there is little flicker on the road surface, there is no discomfort and the vehicle can travel safely. Further, since the light distribution has a narrow angle, it is possible to irradiate only the road surface 55 and cut light in the upward direction, thereby making it possible to take measures against light pollution. In addition, since the light beam is radiated in a pro-beam direction in the traveling direction as compared with the conventional light guide, the preceding vehicle can be easily recognized.

A fifteenth embodiment of the present invention will be described with reference to FIGS. That is, in the illuminating device, in the thirteenth and fourteenth embodiments, one light guide 36 is provided with two or more openings 37 so that light can be emitted in a plurality of directions. is there. A hollow light guide lighting device having a plurality of light distribution control panels 3 is arranged on a railing, a wall surface and near a median strip of a road. In the present embodiment, it is installed near the median strip on the road surface 55.

The installation height H is desirably 0.7 m to 2.5 m. In the present embodiment, the height H is set at 1.5 m. In a hollow light guide arranged for a road, the opening angles θ1 and θ2 of the irradiation opening are desirably 5 to 120 ° as shown in FIG. In the present embodiment, approximately 40
°. Light guide diameter φ is 50mm ~ 200m
m is desirable. In the present embodiment, φ = 150 mm.

The light distribution control prism panel 3 is described in claims 2-7.
The prism shape described in the above embodiment corresponding to the above is preferable. In this embodiment, a triangular prism according to claim 2 is used. In this embodiment, a prism whose apex angle α of the triangular prism shown in FIG. 29 is specified to be approximately 105 ° is used.

The light distribution control panel 3 is arranged so that the flat surface of the prism faces outward in a direction perpendicular to the prism axis with respect to the optical axis (longitudinal direction).

The installation angle β of the road light guide 36 is desirably 30 ° to 89 °. In this embodiment, FIG.
As shown in (b), β1 and β2 were set to 72 °.

According to this embodiment, the road surface is irradiated with narrow-angle, high-output light emitted from the hollow light guide 36. In addition, one light guide 36 having openings 37 in two directions and light distribution control prisms 3 arranged in each direction is installed on a two-lane separation zone separated by a central separation zone or the like. It is possible to illuminate the lane. -If the configuration of the light guide lighting device described above is used, it is possible to control the light distribution to have a narrow angle light distribution and a high emission.

For example, if this light guide lighting device 54 is used as road lighting, it becomes possible to irradiate a wider road surface uniformly than conventional light guide lighting. In addition, since the flickering of the road surface 55 is small, there is no discomfort and the vehicle can travel safely. Furthermore, since the light distribution is of a narrow angle, it is possible to irradiate only the road surface and cut light in the upward direction, thereby making it possible to take measures against light pollution.

A sixteenth embodiment of the present invention will be described with reference to FIGS. 36 and 38. That is, this lighting device illuminates the road surfaces 60 and 61 of a plurality of lanes on the same side by providing a plurality of emission openings 37 in one lighting device. The light distribution control panel 3 is disposed in each of the emission openings 37 of one light guide 36, and different road surfaces 60 and 61 are illuminated for each panel. As shown in FIG. 37, by adjusting the opening angle θ and the installation angle β of the opening 37,
The road surface 60 near the light guide 36 is also
A road surface 61 distant from the vehicle can be uniformly irradiated.

A hollow light guide luminaire having the light distribution control panel 3 according to the twelfth embodiment (corresponding to claim 9) is arranged near a railing, a wall surface and a median strip of a road. In the present embodiment, it is installed in the column section 70. The installation height H is desirably 0.7 m to 2.5 m. In the present embodiment, it is installed at a height H = 1.2 m.

In a hollow light guide arranged for a road, the opening angles θ1 and θ2 of the irradiation opening are determined according to FIG.
As shown in (a), the angle is preferably 5 to 90 degrees. In the present embodiment, θ1 = approximately 40 ° and θ2 = approximately 25 °. The diameter φ of the light guide 36 is desirably 50 mm to 200 mm. In the present embodiment, φ = 150 mm. The light distribution control prism panel 3 desirably has the prism shape described in the above embodiment corresponding to claims 2 to 7. In the present embodiment, a triangular prism in which the apex angle α of the triangular prism is set to approximately 105 ° is used.

The light distribution control panel 3 is disposed so that the flat surface of the prism faces outward in a direction perpendicular to the prism axis with respect to the optical axis (longitudinal direction). The installation angle β of the road light guide is desirably 30 ° to 89 °. In this embodiment, β1 = 79 ° and β2 = 45 °. With narrow-angle, high-power light emitted from this hollow light guide 36,
The road surfaces 60 and 61 are irradiated.

FIG. 38 shows light distribution characteristics of a conventional light guide and a light guide having the light distribution control panel 3.

According to this embodiment, by using the configuration of the above-described light guide lighting device, it is possible to control the light distribution to a narrow angle light distribution and a high light emission. For example, when this light guide lighting device is used as road lighting, it becomes possible to irradiate a wider road surface (for example, two lanes) evenly and uniformly than conventional light guide lighting (the uniformity level). Improvement). Compared to a conventional light guide, the average illuminance on the road surface was improved by about 1.5 times, and the brightness uniformity was also improved.

Further, since the light distribution is a narrow angle and the light distribution can be controlled for each of the openings, it is possible to irradiate only the road surfaces 60 and 61 and to cut off the light in the upward direction, thereby making it possible to take measures against light pollution. Becomes

By combining different prisms in the plurality of exit apertures 3, it is possible to control light distribution arbitrarily, to realize a variety of narrow-angle light distribution, and to irradiate the road surface efficiently and uniformly. Becomes

A seventeenth embodiment of the present invention will be described with reference to FIGS. 39 and 40. That is, as in the sixteenth embodiment, by providing two or more openings in one light guide, this lighting device can emit light in a plurality of directions. In the present embodiment, four openings 37 are provided. In this case, corresponding to a plurality of lanes on the same side, a plurality of emission openings 37 are provided in one lighting device.
And illuminate. In the present embodiment, the central divider 64
2 corresponding to the road surfaces 60 and 61 and the road surfaces 62 and 63
An opening 37 was provided for each location.

A hollow light guide lighting device having the light distribution control panel 3 according to the twelfth embodiment corresponding to the ninth embodiment is arranged near a railing, a wall surface, and a median strip of a road. In the present embodiment, it is installed near the median strip 64 corresponding to the opening 37. Installation height H is 0.7m
2.5 m is desirable. In the present embodiment, the height H =
It was installed at a height of 1.5 m.

The hollow light guide 36 arranged in the present embodiment is arranged such that the opening 37 of the light guide 36 shown in FIG. Configuration.

According to this embodiment, the central divider 64
The four lanes are illuminated by providing openings 37 in four directions on a two-lane separation zone separated by the same, and installing one light guide 36 in each of which the light distribution control prism panel 3 is arranged. It is possible to In addition, by using the above-described configuration of the light guide lighting device, it is possible to control the light distribution with a narrow angle and a high emission, and to uniformly irradiate a wide road surface width as compared with the conventional light guide lighting. Becomes possible. Furthermore, since there is little flicker on the road surface, there is no discomfort and the vehicle can travel safely. In addition, since the light distribution can be controlled for each of the openings 37, it is possible to irradiate only the road surface and cut off the upward light, thereby making it possible to take measures against light pollution.

An eighteenth embodiment of the present invention will be described with reference to FIGS. That is, this lighting device is a tunnel light, and is installed above the center of a plurality of lanes. As in the twelfth embodiment and the sixteenth embodiment,
The road is illuminated from the plurality of emission openings 37.

The road surfaces 60 and 61 are uniformly illuminated by using the light guide lighting device 54 having a plurality of emission openings 37 installed substantially above the center of a plurality of lanes of the tunnel 80. By providing two or more openings 37 in one light guide 36, light can be emitted in a plurality of directions and the road surface can be made uniform. A hollow light guide lighting device 54 having the light distribution control panel 3 according to the twelfth embodiment corresponding to the ninth embodiment is arranged above the center of a plurality of lanes of the tunnel 80. The installation height H is desirably 2.5 m to 10 m.
In the present embodiment, it is installed at a height H = 7 m. Further, in the hollow light guide 36 arranged for roads, as shown in FIG.
, Θ2 are preferably 5 to 120 °. In the present embodiment, it is set to approximately 40 °.

The light guide 36 has a diameter φ of 50 m.
m to 200 mm is desirable. In this embodiment, φ = 200
mm.

The light distribution control prism panel 3 is described in claims 2-7.
The prism shape described in the above-described embodiment corresponding to the above is preferable. In the present embodiment, a triangular prism is used, and the apex angle α of the triangular prism is set to approximately 120 °. The light distribution control panel 3 is arranged so that the flat surface of the prism 4 faces outward in a direction in which the prism axis is orthogonal to the optical axis (longitudinal direction).

The installation angle β of the road light guide is desirably 30 ° to 89 ° as shown in FIG. In the present embodiment, β1, β2 = 35 °. The road surface is illuminated with narrow-angle, high-output light emitted from the hollow light guide 36.

The number of lanes in this embodiment is two. The lane width D is 3.75 m × 2 vehicles.

According to the present embodiment, one light guide 3 in which openings 37 are provided in two directions substantially in the upper center of the tunnel 80 and the light distribution control prism panels 3 are arranged in each of the openings 37.
By installing 6, it becomes possible to irradiate a wide road surface uniformly. If this light guide lighting device is used as road lighting, it becomes possible to irradiate a wide road surface width uniformly without unevenness as compared with conventional light guide lighting. As shown in FIG. 41B, the light guide P of the conventional light guide has a round light distribution and a small amount of emission, and therefore it is difficult to irradiate the road surface in the tunnel with uniformity. However, FIG.
By irradiating the light from approximately above the center of the tunnel 80 using the light guide 36 having the light distribution control panel 3 as shown in FIG. 1A, the road surface illuminance distribution can be made uniform. FIG.
3 shows the illuminance distribution in the cross-sectional direction of the road surface.

Further, since there is little flickering on the road surface, there is no discomfort and the vehicle can travel safely.

A nineteenth embodiment of the present invention will be described with reference to FIGS. That is, this lighting device
In a twelfth embodiment corresponding to claim 9, the light distribution control panel 3 is used for a light guide type road marking light fixture. An emission light guide is arranged inside the sign, and the narrow-angle light distribution control prism panel 3 is arranged in the opening (light emission part) 37. 44A shows an example in which the light source 35 is installed below the sign display surface 83, and FIG. 44B shows an example in which the light source is installed on the side. 84 is a light guide light guide, and 85 is a light guide bending unit.

Here, the conventional light guide type road marking light fixture has a structure as shown in FIG. 90 is a back reflector, 91 is an outer box. Since the light distribution of the light emitted from the light guide 36 that does not use the light distribution control panel 3 as in the present embodiment is a substantially circular light distribution, the display surface 83 needs to have a uniform display surface in order to have uniform brightness. The size of 83, particularly the length in the emission direction of the light from the emission light guide 36, is restricted. The basic configuration of the exit light guide 36 is shown in FIG.
It is as follows. Outer shell tube 86, reflector film 87, extractor film 88, light guide film 89
Consists of The outer shell tube 86 is a transparent or milky white plastic pipe, and its material is generally polycarbonate or acrylic resin. The reflector film 87 controls the light distribution of the emitted light, and a material having a high reflectivity is generally used. Is done. The extractor film 88 controls the amount of light emitted from the hollow light guide in the length direction. As a material, a white material having a high diffuse reflectance is generally used.
For example, a highly reflective white PET film (Lumirror manufactured by Toray Industries, Inc.) is used. The portion from which light is emitted from the hollow light guide 36 is a portion that is not covered with the reflector film 87.

FIG. 47 shows the structure of the display surface 83 having the light distribution control panel 3. In the present embodiment, the height of the display surface 83 is set to 1. Prototype was made 5 times as long. Back reflector 9
For 0, a high-reflection white reflector (reflectance = 97%) was used. The configuration of the emission light guide 36 is as shown in FIG. The opening angle α is set to 20 depending on the size of the display surface 83.
It is set in the range of {-90}. In the present embodiment, the opening angle is 45 °. The material of the light distribution control prism panel 3 is acrylic resin, and the angle of the apex angle of the triangular prism 4 is
120 ゜. As the material of the reflector film 87 and the extractor film 88, "Lumirror", a high reflection white PET film manufactured by Toray Industries, Inc., was used. As the light guide film 89, "SOLF" manufactured by 3M was used. The material of the outer shell tube is an acrylic resin.

According to this embodiment, the light distribution of the light emitted from the light guide 36 can be controlled to a narrow angle.
The length (height direction) of the display surface 83 in the emission light direction can be increased while maintaining the uniformity of the luminance of the display surface 83. Also, in this embodiment, the height is 1. Even if it is 5 times, the luminance uniformity of the display panel display surface 83 is 2. Same as 3.

The brightness uniformity referred to here is a value obtained from the following equation.

Luminance uniformity = maximum luminance of display surface / minimum luminance of display surface The structure of the light guide type road sign lighting device can obtain the same effect in a general sign lighting device with the same configuration.

As a modification of this embodiment, for example, in the device form shown in FIG.
3 was installed on the side or lower side, and the display surface 83 was prototyped with the same height as the conventional example. As the back reflector, a high-reflection white reflector (reflectance = 97%) was used. The configuration of the emission light guide is as shown in FIG. The opening angle is set in the range of 20 ° to 90 ° depending on the size of the display surface. In the present embodiment, the opening angle is 45 °. The material of the light distribution control prism panel is an acrylic resin, and the apex angle of the prism is 120 °. The material of the reflector film and the extractor film is Toray
"Lumirror", a high-reflection white PET film manufactured by Co., Ltd., was used. “SOLF” manufactured by 3M was used as the light guide film. The material of the outer shell tube is an aluminum extruded outer shell.

According to this modification, the light distribution of the output light from the output light guide can be controlled to a narrow angle, so that the uniformity of the luminance of the display surface is improved. Further, while the luminance uniformity of the conventional example is 2.3, the luminance uniformity of the present embodiment is 1. 9 and the uniformity improved. Here, the luminance uniformity is a value obtained from the following equation.

Luminance uniformity = maximum luminance of display surface / minimum luminance of display surface The structure of the light guide type road sign lighting device can obtain the same effect in a general sign lighting device with the same configuration.

A twentieth embodiment of the present invention will be described with reference to FIGS. 49 and 50. That is, in the nineteenth embodiment, a marker light in which two upper and lower emission light guides 36 are arranged, and the device form is a type in which the light source 35 is installed on the side surface of the display surface 83 as shown in FIG. I have. The structure of the display surface 83 is shown in FIG. As the back reflector 90, a high-reflection white reflector (reflectance = 97%) was used.
The configuration of the exit light guide 36 is as shown in FIG. The opening angle is set to 20 depending on the size of the display surface 83.
It is set in the range of {-90}. In the present embodiment, the opening angle is 45 °. The light distribution control prism panel 3 is made of acrylic resin, and the apex angle of the prism is 110 °. As the material of the reflector film and the extractor film, "Lumirror", a high-reflection white PET film manufactured by Toray Industries, Inc., was used. "SOLF" manufactured by 3M was used as the light guide film. The material of the outer shell tube is an acrylic resin.

According to this embodiment, since the light distribution of the emitted light from the emitted light guide can be controlled to a narrow angle, the brightness uniformity on the display surface is improved. Further, by arranging the upper and lower two outgoing light guides, the brightness can be increased. If this type of marker light is used, it can be applied to a large marker light. Further, the configuration of the light guide type road sign lighting device can obtain the same effect with a similar configuration in a general sign lighting device.

A twenty-first embodiment of the present invention will be described with reference to FIGS. That is, in the nineteenth embodiment, a marker light in which the emission light guide 36 provided with the openings 37 in two directions is arranged.
As shown in (a), the light source 35 is provided on the side surface of the display surface 83. The configuration of the display surface 83 is shown in FIG. The back reflector 90 is a highly reflective white reflector (reflectance =
97%). The configuration of the exit light guide 36 is shown in FIG.
As shown in FIG. 2B, the opening (light emitting portion) 37
Are provided on opposite sides of each other. The opening angle is determined on the display surface 83.
Is set in the range of 20 ° to 90 ° depending on the size of. In the present embodiment, both of the opening angles are 30 °. The material of the light distribution control prism panel is acrylic resin, and the apex angle of the prism is 110 °. The material of the reflector film 87 and the extractor film is as follows.
"Lumirror", a high-reflection white PET film manufactured by Toray Industries, Inc., was used. The light guide film 89 is made of 3M “S”
OLF "was used. The material of the outer tube 86 is an acrylic resin.

According to this embodiment, the light distribution of the output light from the output light guide 36 can be controlled to a narrow angle, and the uniformity of the luminance of the display surface 83 is improved by emitting light in two directions. . In addition, the structure of the light guide type road sign lighting device can obtain the same effect with a similar structure in a general sign lighting device.

The twenty-second embodiment of the present invention will be described with reference to FIG. That is, in the embodiment of the illuminating device having the light guide, the light guide 36 has the grooves 90 on both sides of the emission opening of the outer tube 86 of the light guide 36, and the light distribution control panel 3 is attached to the grooves 90. The groove 90 is formed by a mounting guide provided on the outer tube 86. The outer tube 86 is made of metal (aluminum, steel plate, stainless steel), resin, or the like. In the embodiment, the outer tube 86 is made of an extruded aluminum shell, and the light distribution control panel 3 is made of an acrylic resin. The reflective material 91 inside the outer tube (pipe) of the light guide includes a highly reflective material (for example, a sheet, a plate material such as a silver vapor deposition, a high-reflection film treatment, an alumite treatment, a high-reflection white film, or a contour or a light guide film). (A treatment such as high-reflection coating is performed directly). Reference numeral 92 denotes a light guide prism sheet. The light distribution control panel 3 is inserted into the groove 90, and sealed and fixed with packing or the like.

According to this embodiment, in the conventional light guide, the outer tube 86 is formed of a resin pipe, and the emission opening 37 is integrated with the outer tube. However, by providing a groove 90 in the outer tube 86 of the light guide and attaching the light distribution control panel 3 to the groove 90, the light distribution control panel 3 or the outer tube 86 in the opening 37 can be freely replaced. it can. Therefore, the opening 37
The light distribution can be varied without changing the size of the light.

FIG. 54 shows a modification of this embodiment. FIG. 54A shows a case where the light distribution control panel 3 has a curved surface. The radius of curvature is preferably adjusted to the radius of the outer tube. FIG. 54B shows a configuration in which a cover 95 is provided on the front side of the light distribution control panel 3. The width of the groove 90 is increased, and the cover 95 is also inserted and mounted in the same groove 90. Cover 9
5 prevents contamination of the prism panel 3.

[0138]

According to the illumination device of the first aspect, the light distribution can be efficiently controlled to a narrow angle by the prism function of the light distribution control panel.

According to the lighting devices of the second to sixth aspects, the same effects as those of the first aspect can be obtained.

According to the illuminating device of the seventh aspect, in addition to the same effects as those of the first aspect, the prism surface on the incident side is made more accurate, and the shape on the side opposite to the incident direction requires much higher accuracy on the prism surface. Therefore, it is possible to drastically reduce costs when preparing a mold and a prism panel.

According to the illumination device of the eighth aspect, in addition to the same effects as those of the first aspect, the light guide loss can be reduced by controlling the light incident on the light guide plate at a narrow angle.

According to the lighting device of the ninth aspect, the same effect as that of the first aspect is obtained.

According to the lighting device of the tenth aspect, the same effect as that of the first aspect is obtained.

According to the illuminating device of the eleventh aspect, in addition to the same effects as those of the first aspect, it is possible to irradiate a wide road surface uniformly and to control the light distribution for each opening, so that it is possible to irradiate only the road surface. By cutting the light upward, light pollution countermeasures can be taken.

According to the lighting device of the twelfth aspect, in addition to the same effect as the first aspect, the uniformity of the road surface can be improved.

According to the illumination device of the thirteenth aspect, in addition to the same effect as the first aspect, the light distribution of the light emitted from the light guide can be controlled to a narrow angle, so that the uniformity of the luminance of the display surface is improved. However, it is possible to increase the length of the display surface in the emission light direction.

According to the illumination device of the fourteenth aspect, in addition to the same effects as those of the first aspect, the light distribution control panel is configured to be freely replaceable, so that the light is emitted without changing the size of the opening. Variations in light distribution.

According to the light distribution control panel of the present invention, the same effects as those of the first aspect can be obtained.

According to the light distribution control panel of the twentieth aspect, the same effect as that of the seventh aspect can be obtained.

[Brief description of the drawings]

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

FIG. 2A is a perspective view of a plurality of prisms, and FIG. 2B is a perspective view of a light distribution control panel.

FIG. 3 is a perspective view of a light distribution control panel according to a modified embodiment.

FIG. 4 is an exploded perspective view when a light distribution control panel is provided in the light projector.

FIG. 5 is a perspective view of an isosceles triangular prism panel according to a second embodiment.

6A is a light distribution simulation diagram with a vertical angle of 100 °, and FIG. 6B is a light distribution simulation diagram with a vertical angle of 105 °.

7A is a light distribution simulation diagram at a vertex angle of 110 °, and FIG. 7B is a light distribution simulation diagram at a vertex angle of 115 °.

8A is a light distribution simulation diagram at a vertex angle of 120 °, and FIG. 8B is a light distribution simulation diagram at a vertex angle of 125 °.

FIG. 9 is a light distribution simulation diagram at an apex angle of 130 °.

FIG. 10A is a perspective view of a prism according to a third embodiment, and FIG. 10B is a perspective view of a light distribution control panel.

FIG. 11A is a perspective view of a prism according to a fourth embodiment, and FIG. 11B is a perspective view of a light distribution control panel.

12A is a schematic cross-sectional view of a convex semi-elliptical prism according to the fifth embodiment, FIG. 12B is a schematic cross-sectional view of a partially elliptical prism, and FIG. 12C is a concave cross-sectional view. FIG. 3D is a schematic sectional view of a semi-elliptical prism, and FIG.

FIG. 13 is a light distribution simulation diagram thereof.

14A is a schematic cross-sectional view of a convex semi-circular prism according to the sixth embodiment, FIG. 14B is a schematic cross-sectional view of an arc-shaped prism, and FIG. FIG. 3D is a schematic sectional view of a circular prism, and FIG. 4D is a schematic sectional view of the circular prism.

FIG. 15 is a light distribution simulation diagram.

16A is a perspective view of an asymmetric triangular prism according to the seventh embodiment, FIG. 16B is a perspective view of a light distribution control panel, and FIG. 16C is a view for explaining an incident direction of the light. FIG.

17 (a) is a perspective view of a modified asymmetric convex prism, FIG. 17 (b) is a perspective view of a light distribution control panel, and FIG. 17 (c).
FIG. 4 is an explanatory diagram for explaining the incident direction of the light.

18A is a perspective view of a modified asymmetric concave prism, and FIG. 18B is a perspective view of a light distribution control panel.

FIG. 19 is an exploded perspective view of the eighth embodiment.

FIG. 20 is a sectional view of a tunnel according to a ninth embodiment.

FIG. 21 is an exploded perspective view of the lighting fixture.

FIG. 22 is a perspective view of a main part of a tenth embodiment.

FIG. 23 is a perspective view in a case where there is no light distribution control panel in the description of the eleventh embodiment.

FIG. 24 is an exploded perspective view showing a state where the light distribution control panel is incorporated.

FIG. 25 is a perspective view showing a state where the light distribution control panel is incorporated.

FIG. 26A is an exploded perspective view of a twelfth embodiment,
(B) is a perspective view of the assembled state.

FIG. 27 is a perspective view of a case where there are a plurality of openings.

FIG. 28 (a) is a schematic sectional view of a thirteenth embodiment,
(B) is a bottom view seen from the opening side.

FIG. 29 is a perspective view of a light distribution control panel including a plurality of triangular prisms.

FIG. 30 is a light distribution characteristic diagram of the thirteenth embodiment.

FIG. 31 is a perspective view of a main part of a fourteenth embodiment.

FIG. 32A is a schematic cross-sectional view of a light guide, and FIG.
FIG. 3 is a schematic cross-sectional view for explaining the direction of the exit aperture.

FIG. 33 is a light distribution characteristic diagram of the fourteenth embodiment.

FIG. 34 is a perspective view of a main part of the fifteenth embodiment.

FIG. 35 (a) is a schematic cross-sectional view illustrating an output opening of a light guide, and FIG. 35 (b) is a schematic cross-sectional view illustrating the direction of the output opening.

FIG. 36 is a perspective view of a main part of a sixteenth embodiment.

FIG. 37 (a) is a schematic cross-sectional view illustrating an emission opening of a light guide, and FIG. 37 (b) is a schematic cross-sectional view illustrating the direction of the emission opening.

FIG. 38 is a light distribution characteristic diagram of the sixteenth embodiment.

FIG. 39 is a perspective view of a main part of a seventeenth embodiment.

FIG. 40 is a schematic cross-sectional view illustrating an emission opening of a light guide.

FIG. 41 (a) is a sectional view of a tunnel according to the eighteenth embodiment, and FIG. 41 (b) is an explanatory diagram illustrating light distribution P in a conventional tunnel.

42A is a schematic cross-sectional view illustrating an emission opening of a light guide, and FIG. 42B is a schematic cross-sectional view illustrating the direction of the emission opening.

FIG. 43 is an illuminance distribution diagram in a cross-sectional direction of a road surface.

FIGS. 44A and 44B show a nineteenth embodiment, wherein FIG. 44A is a front view of a light source provided below a display surface, and FIG.

FIG. 45 is a partial perspective view illustrating the structure of a light guide type road marking light device without a light distribution control panel.

FIG. 46 (a) is a partially cutaway perspective view of the light guide, and FIG. 46 (b) is a cross-sectional view.

FIG. 47 is a partial perspective view illustrating the structure of a light guide type road marking light device having a light distribution control panel.

FIG. 48 is a sectional view of the same.

FIG. 49 is a front view of the twentieth embodiment.

FIG. 50 is a partial perspective view of the marker light device.

FIG. 51 is a partial perspective view of the beacon light fixture of the twenty-first embodiment.

52A is a front view of a display surface, and FIG. 52B is a cross-sectional view of a light guide.

FIG. 53 (a) is a sectional view of a light guide according to a twenty-second embodiment, and FIG. 53 (b) is a partially enlarged view thereof.

FIGS. 54A and 54B are cross-sectional views of modified examples of the light guide.

FIG. 55 is a perspective view of road lighting.

FIG. 56 is a perspective view of handrail lighting.

FIG. 57 is a perspective view of a sign / signboard light.

FIG. 58 is a perspective view of another sign / signboard light.

FIG. 59 is a perspective view of a fluorescent lamp device.

FIG. 60 is a perspective view of a louver light distribution control square type instrument.

FIG. 61 is a perspective view of a gutter-like device for louver light distribution control.

FIG. 62 is a perspective view of a gutter-like device for light distribution control using a reflector.

FIG. 63 is a perspective view of a spotlight of light distribution control by a reflecting mirror.

FIG. 64 is a perspective view of a downlight whose light distribution is controlled by a reflecting mirror.

FIG. 65 is a perspective view of a light projector whose light distribution is controlled by a reflecting mirror.

FIG. 66 is an explanatory diagram illustrating light distribution control of a light guide.

FIG. 67 is a characteristic diagram of conventional cross-sectional light distribution.

FIG. 68 is a front view of a hollow light guide lighting device.

FIG. 69 (a) is a partially broken perspective view of a light guide,
(B) is a sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light source 2 Emission opening part 3 Light distribution control panel 4 Prism 20 Tunnel 21 Lighting device 22 Light distribution 23 Column lighting device 24 Wall surface 25 Light distribution 26 Road surface 30 Cold cathode lamp 30a Reflection plate 31 Light guide plate 32 Diffuse reflection sheet 35 Light source 36 Light Guide 37 Emission opening 54 Light guide lighting device 55 Road surface 60 Road surface 61 Road surface 63 Road surface 64 Road surface 70 Wall railing 80 Tunnel 83 Display surface 90 Groove 95 Cover

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G09F 13/18 F21W 111: 08 // F21W 111: 02 F21Y 103: 00 111: 08 F21S 3/00 Z F21Y 103: 00 1/00 BF (72) Inventor Osamu Kuramitsu 1048 Odakadoma, Kadoma-shi, Osaka Matsushita Electric Works, Ltd. (72) Inventor Satoshi Okada 1048 Odakadoma, Kadoma-shi, Osaka Matsushita Electric Works, Ltd. Kensaku Atsumi 1048 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Works F-term (reference) 5C096 AA02 BA02 CA02 CA06 CA14 CB01 CC10 CC13 CD02 CD53 CE12 CE15 CF02 CG13 FA03

Claims (20)

[Claims] 1. A lighting device comprising a light source and a light distribution control panel provided at an emission opening of the light source, wherein the light distribution control panel includes a plurality of linear prisms arranged substantially adjacent to each other. An illumination device, wherein a convex portion of each prism is arranged on an incident surface side. 2. The illumination device according to claim 1, wherein the prism has a triangular cross section, and the apex angle of the triangular shape is specified to be approximately 105 ° to approximately 130 °. 3. The illumination device according to claim 1, wherein the prism has a convex cross-sectional shape. 4. The illumination device according to claim 1, wherein the prism has a concave curved section. 5. The illumination device according to claim 3, wherein the prism has an elliptical cross section. 6. The illumination device according to claim 3, wherein the prism has an arc-shaped cross section. 7. The illumination device according to claim 1, wherein the cross section of each prism is asymmetrical when the light source has directivity in the incident direction. 8. The lighting device according to claim 1, wherein the lighting device is a light-guiding indicator light device having a light guide panel, and a light distribution control panel is arranged between the light source and the light guide panel. 9. The lighting device according to claim 1, wherein the lighting device is a hollow light guide lighting device. 10. The lighting device according to claim 9, wherein the lighting device is a high-row lighting light guide. 11. The illuminating device according to claim 10, wherein the illuminating device is for a road, and a plurality of exit openings are provided in one illuminating device to illuminate a plurality of lanes. 12. A lighting device, comprising: a tunnel light having a plurality of exit openings;
The lighting device according to claim 9, wherein a road is illuminated from the plurality of emission openings. 13. The lighting device according to claim 9, wherein the lighting device is a road sign light guide device. 14. The structure of the illuminating device according to claim 9, wherein a groove is formed on an outer periphery of the light guide, and the light distribution control panel is attached to the groove. 15. A light distribution control panel having a triangular cross section and a plurality of prisms each having a triangular apex angle of approximately 105 ° to approximately 130 ° arranged substantially adjacent to each other. 16. A light distribution control panel wherein a plurality of prisms having a convex curved cross section are arranged substantially adjacent to each other. 17. A light distribution control panel, wherein a plurality of prisms having a concave cross section and having a curved shape are arranged substantially adjacent to each other. 18. The light distribution control panel according to claim 16, wherein the light distribution control panel has an elliptical cross section. 19. The light distribution control panel according to claim 16, wherein the light distribution control panel has an arc-shaped cross section. 20. A light distribution control panel in which a plurality of linear prisms are arranged substantially adjacently and juxtaposed, and a convex portion of each prism is arranged on the incident surface side, wherein each prism has an asymmetric cross section. A light distribution control panel.