JP6454938B2 - lighting equipment - Google Patents

Description

  The present invention relates to a lighting fixture, and more particularly to a lighting fixture suitable for road lighting and tunnel lighting.

  As a conventional example, a tunnel illumination device described in Patent Document 1 is illustrated. This conventional example includes a light source unit using a light emitting diode as a light source, an optical lens disposed on the light source unit, and the like. The optical lens is formed such that the cross-sectional shape of the exit surface along the width direction of the tunnel is composed of a plurality of continuous curves having different radii of curvature and is asymmetric with respect to the normal passing through the center of the entrance surface.

  Since the conventional example is configured to irradiate light far along the longitudinal direction of the tunnel (the direction in which the vehicle passes) by the optical lens, the interval between the tunnels can be widened.

JP 2012-212047 A

  However, in the above conventional example, since light is irradiated far away by the optical lens, glare that is uncomfortable for the driver of the vehicle is likely to occur.

  The present invention has been made in view of the above problems, and an object thereof is to suppress unpleasant glare while irradiating light far away.

The lighting fixture according to the present invention includes one or a plurality of LED modules, one or a plurality of lenses for controlling the light distribution of light emitted from the LED modules, and the LED modules and the devices containing the lenses. A main body, and the lens has an incident surface on which light emitted from the LED module is incident, and an emission surface from which the light incident from the incident surface is emitted. The light is distributed in a direction away from the optical axis, and the light emitted in a specific direction whose inclination angle with respect to the optical axis is in a range of 70 ° to 85 ° is relatively reduced. It is characterized by that.

  The lighting fixture of the present invention has an effect that it is possible to suppress unpleasant glare while irradiating light far away.

Embodiment of the lighting fixture which concerns on this invention is shown, FIG. 1A is a front view, FIG. 1B is a side view. It is a perspective view of the lens in the same as the above. 3A is a cross-sectional view taken along a plane F1 in FIG. 2, and FIG. 3B is a cross-sectional view taken along a plane F2 in FIG. FIG. 4A is a longitudinal sectional view, and FIG. 4B is a transverse sectional view. FIG. 5A shows the same isometric view, and FIG. 5B shows the isometric view of the comparative example. 6A to 6C are cross-sectional views showing other configurations of the lens in the same as above. 7A and 7B are cross-sectional views showing the structure of an inappropriate lens.

  As an embodiment of the present invention, a lighting fixture (tunnel lamp) used for tunnel lighting is illustrated. However, the present invention is also applicable to lighting fixtures used for road lighting, such as road lights.

  As illustrated in FIGS. 1A and 1B, the lighting fixture 8 of the present embodiment includes a plurality of LED modules 1, a plurality of lenses 2 that control light distribution of light emitted from the LED modules 1, and an LED module. 1 and an instrument body 3 that accommodates the lens 2. Moreover, it is preferable that the lighting fixture 8 of this embodiment accommodates the power supply device which makes each LED module 1 light-emit in the fixture main body 3. FIG.

  The instrument body 3 includes a case 30 and a cover 31. The case 30 is preferably formed of a metal material in a box shape whose front surface is open. The cover 31 is preferably composed of a panel 310 and a frame body 311. The panel 310 is preferably formed in a flat plate shape that matches the outer shape of the opening of the case 30 using a light-transmitting material such as quartz glass or polycarbonate resin. The frame body 311 is preferably formed of a metal material in a frame shape that matches the outer shape of the opening of the case 30 and supports the periphery of the panel 310 over the entire circumference. The cover 31 is attached to the case 30 by a pair of hinges 32 so as to be rotatable between a closed position where the front opening of the case 30 is closed and an open position where the front opening is opened. In addition, a pair of stoppers 33 are preferably provided on the edge of the case 30. That is, in a state where the cover 31 is in the closed position, the cover 31 is preferably fixed in the closed position by the pair of stoppers 33 being hooked on the end portions on the free end side of the cover 31.

  Further, two mounting brackets 34 are provided on the bottom surface of the outer side of the instrument body 3 (case 30) so as to protrude to the outside for mounting on the wall surface of the tunnel 9. These mounting brackets 34 are fixed to the wall surface of the tunnel by screwing (see FIG. 4B).

  The LED module 1 has an LED chip mounted on the surface of a substrate made of an insulating material such as ceramics, and the blue light emitted from the LED chip is converted into yellow light by the wavelength conversion member, and then mixed, It is preferably configured to emit white light. However, in the present embodiment, a large number of LED modules 1 are mounted in a matrix on a single mounting board, and one light source block 10 is configured by being electrically connected to each other. preferable. Then, as shown in FIG. 1A, the plurality of light source blocks 10 are accommodated in the case 30 in a state of being arranged vertically and horizontally.

  The power supply device is preferably configured to convert a voltage / current supplied from an external power supply (for example, a commercial AC power supply) into a DC voltage / current suitable for each light source block 10. The power supply device also includes a printed wiring board on which various circuit components are mounted and a metal housing that houses the printed wiring board, and is located behind the light source block 10 in the case 30 (on the bottom plate side of the case 30). ).

  The lens 2 is preferably configured as a part of the lens block 4. In the lens block 4, it is preferable that the plurality of lenses 2 and the main body 40 are integrally formed of a synthetic resin material having translucency such as acrylic resin. The main body 40 is preferably formed in a rectangular flat plate shape. The plurality of lenses 2 are provided at a number and position corresponding to the plurality of LED modules 1 of the light source block 10 on a one-to-one basis.

  Next, the lens 2 in this embodiment will be described in detail with reference to FIGS. 2, 3A and 3B. FIG. 2 is a perspective view of the lens 2. 3A shows a cross-sectional view in the plane F1 of FIG. 2, and FIG. 3B shows a cross-sectional view in the plane F2 of FIG. However, the two planes F1 and F2 are orthogonal to each other.

  The lens 2 has an entrance surface 20 and an exit surface 21. As shown in FIGS. 3A and 3B, the incident surface 20 has a parabolic shape in the cross-sectional shapes in the two planes F1 and F2, and brings the cross-sectional shape in the plane F2 closer to the flat shape than the cross-sectional shape in the plane F1. It is preferable to be formed as follows. The exit surface 21 is preferably formed so that the cross-sectional shapes in the two planes F1 and F2 are both semi-elliptical and the cross-sectional shape in the plane F2 is inclined with respect to the optical axis X of the LED module 1. In other words, the lens 2 distributes the light emitted from the LED module 1 in a direction away from the optical axis X in one plane F1, and the light from the optical axis X on one side in the other plane F2. It is configured to distribute light in a direction inclined to the (road side).

  Furthermore, as shown in FIGS. 2 and 3A, the lens 2 is provided with a pair of dimming portions 22. The dimming unit 22 is configured to relatively reduce light emitted in a specific direction with an inclination angle φ [°] with respect to the optical axis X within a predetermined range (light emitted from the LED module 1). The However, the specific direction is a direction in which, when the lighting fixture 8 of the present embodiment is installed in the tunnel 9, it is likely to cause unpleasant glare for a driver of a vehicle (for example, an automobile 7) passing through the tunnel 9. And For example, the specific direction is preferably set to a direction in which the inclination angle φ is 70 ° ± α ° (where 0 ≦ α ≦ 15).

  As shown in FIG. 2 and FIG. 3A, the light reduction unit 22 is preferably configured by a recess provided in a portion that distributes light in a specific direction. Furthermore, it is preferable that at least a part of the exit surface 21 of the concave portion constituting the dimming portion 22 is configured so as not to cause a step at the boundary with the output surface 21 excluding the concave portion (see FIG. 3A).

  As shown in FIG. 1A, the lens block 4 can be arranged in the instrument body 3 so that the major axis direction (direction parallel to the plane F1) of each lens 2 coincides with the longitudinal direction of the instrument body 3. preferable.

  As shown in FIGS. 4A and 4B, the luminaire 8 is preferably installed in the vicinity of the boundary between the vertical wall and the arc-shaped ceiling in the face-to-face tunnel 9. However, it is preferable that the lighting fixture 8 is installed so that the optical axis of the LED module 1 may be inclined from the vertical direction to the center line side.

  Here, the light distribution characteristic of the luminaire 8 in the direction of passage in the tunnel 9 (the left-right direction in FIG. 4A) is a short isosceles triangle, as indicated by the broken line L1 in FIG. 4A. Moreover, the light distribution characteristic of the lighting fixture 8 in the road width direction (the left-right direction in FIG. 4B) in the tunnel 9 is a triangular shape having one apex angle as an obtuse angle, as indicated by a broken line L2 in FIG. 4B.

  As described in the related art, when the lighting fixture 8 emits light far along the direction of travel, glare that is uncomfortable for the driver of the automobile 7 is likely to occur. Therefore, in the lighting fixture 8 of the present embodiment, the light dimming unit 22 provided in the lens 2 relatively reduces the light emitted in a direction (specific direction) in which unpleasant glare is likely to occur for the driver. .

  Here, the light distribution characteristics of the lens 2 in the present embodiment will be described in detail with reference to FIGS. 5A and 5B. 5A shows an isometric view of the lens 2 provided with the dimming section 22, and FIG. 5B shows an isometric view of the lens 2 without the dimming section 22.

  Comparing the isoluminosity diagram of FIG. 5A with the isoluminosity diagram of FIG. 5B, regardless of the presence or absence of the dimming part 22, the horizontal angle that is the maximum luminous intensity is about 60 ° and the vertical angle is about 80 °. Here, in the isoluminosity diagram of FIG. 5B, all isoluminosity curves are elliptical, whereas in the isoluminosity diagram of FIG. 5A, the third and fourth isoluminosity curves from the highest are shown in a specific direction. The shape is broken (recessed) from the oval shape. That is, the lens 2 in the present embodiment is configured to relatively reduce the luminous intensity in a specific direction (horizontal angle is about 90 ° and vertical angle is about 60 °). Therefore, compared with the case where the light reduction part 22 is not provided in the lens 2, the lighting fixture 8 of this embodiment can aim at suppression of an unpleasant glare, irradiating light far away.

  As described above, the lighting fixture 8 of this embodiment includes one or a plurality of LED modules 1, one or a plurality of lenses 2 that control the light distribution of light emitted from the LED modules 1, and the LED modules. 1 and an instrument body 3 that accommodates the lens 2. The lens 2 has an incident surface 20 on which light emitted from the LED module 1 is incident, and an output surface 21 that emits light incident from the incident surface 20. The lens 2 distributes the light in a direction away from the optical axis X of the LED module 1 and relatively reduces the light emitted in a specific direction in which the inclination angle φ with respect to the optical axis X is within a predetermined range. Configured to let

  The lighting fixture 8 of the present embodiment is configured as described above, and the lens 2 is configured so as to relatively reduce the light (luminous intensity) in a specific direction. It is possible to suppress unpleasant glare while irradiating.

  By the way, the shape of the light reduction part 22 is not limited to the recessed part mentioned above. For example, as shown in FIG. 6A, the light reduction unit 22 may be configured by a convex portion provided in a portion that distributes light in a specific direction. Moreover, it is preferable that at least a part of the light exit surface 21 of the convex portion constituting the light reduction portion 22 is configured so as not to cause a step at the boundary with the light output surface 21 excluding the convex portion.

  Or as shown to FIG. 6B, the light reduction part 22 may be comprised by the curved-surface-shaped recessed part which comprises some spherical surfaces. Or as shown to FIG. 6C, the light reduction part 22 may be comprised by the hemispherical convex part.

  As described above, in the lighting fixture 8 of the present embodiment, it is preferable that the lens 2 is provided with at least one of a convex portion and a concave portion (a light reducing portion 22) in a portion that distributes the light in the specific direction. .

  If the lighting fixture 8 of this embodiment is comprised as mentioned above, the said light radiated | emitted in a specific direction can be reduced relatively by a comparatively simple structure.

  Moreover, in the lighting fixture 8 of this embodiment, at least a part of the emission surface 21 of the convex portion (the dimming portion 22) and the emission surface 21 of the concave portion (the dimming portion 22) is an emission surface excluding the convex portion and the concave portion. It is preferable to configure so as not to cause a step at the boundary with 21.

  If the lighting fixture 8 of this embodiment is comprised as mentioned above, the said light radiated | emitted in a specific direction can be reduced relatively by a comparatively simple structure.

  However, as shown in FIG. 7A, a convex portion 23 that simply translates the exit surface 21 outward, or a recess that simply translates the exit surface 21 inward as shown in FIG. 7B. 24 cannot relatively reduce the light emitted in a specific direction. Therefore, the convex part 23 and the concave part 24 cannot be used as the light reducing part 22.

DESCRIPTION OF SYMBOLS 1 LED module 2 Lens 3 Appliance main body 8 Illumination fixture 20 Incident surface 21 Output surface 22 Dimming part

Claims (3)

One or a plurality of LED modules, one or a plurality of lenses for controlling the light distribution of light emitted from the LED modules, and an instrument body for housing the LED modules and the lenses,
The lens has an incident surface on which light emitted from the LED module is incident, and an output surface from which the light incident from the incident surface is emitted,
The lens distributes the light in a direction away from the optical axis of the LED module, and relatively emits the light emitted in a specific direction having an inclination angle with respect to the optical axis in a range of 70 ° to 85 °. A luminaire characterized in that it is configured to be reduced.   The lighting device according to claim 1, wherein the lens is provided with at least one of a convex portion and a concave portion in a portion that distributes the light in the specific direction.   At least a part of the emission surface of the convex portion and the emission surface of the concave portion is configured not to cause a step at a boundary with the emission surface excluding the convex portion and the concave portion. The lighting fixture according to claim 2.

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