JP2016066483A - Luminaire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire that is adaptive to a case in which an illuminance peak region shifts from a center part of an irradiation region, according to an embodiment of the present invention.SOLUTION: A luminaire according to an embodiment has a light emission part which emits illumination light and a collimator capable of changing an angle of installation to the light emission part according to light distribution characteristics of the illumination light emitted from the light emission part. Consequently, there is provided the luminaire adaptive to a case in which an illuminance peak region shifts from a center part of the irradiation region.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a lighting device.

  2. Description of the Related Art Conventionally, illumination devices such as a projector that illuminate a ground or the like have been widely used. For example, the projector has a halogen lamp as a light emitting unit and is used as a spotlight or the like.

  In recent years, some have light emitting diodes (hereinafter referred to as LEDs) as solid-state light emitting elements as light emitting portions in order to increase the lifetime, save energy, reduce weight, and the like. Such an LED type projector has, for example, a plurality of surface-mounted LEDs and a reflector.

  Some projectors are equipped with a sighting device so that illumination points can be aimed.

  In the case of an illuminating device using a halogen lamp or the like, the illuminance peak area at the center of the irradiation area is wide, so that the positional deviation between the illuminance peak and the aiming point is difficult.

  However, in the case of an illumination device using LEDs, the illuminance peak area at the center of the irradiation area is narrow, so if the illumination light is irradiated at an angle rather than perpendicular to the surface to be illuminated, the illuminance peak in the irradiation area There is a problem that the region is shifted from the center of the irradiation region. Therefore, even if aiming of the irradiation point of the illuminating device is performed using a fixed sight provided in the illuminating device, there is a problem that the illuminance peak region is shifted from the center of the irradiated region.

  When the illuminance peak area deviates from the center of the irradiation area, adjustment work is performed so that the illuminance peak area becomes the center of the irradiation area.

JP 2014-86159 A

  Therefore, an object of the embodiment is to provide an illuminating device that can cope with a case where the illuminance peak region is shifted from the center of the irradiation region.

  An illuminating device according to an embodiment includes: a light emitting unit that emits illumination light; and a sight that can change an installation angle with respect to the light emitting unit according to a light distribution characteristic of the illumination light emitted from the light emitting unit. .

  According to the embodiment of the present invention, it is possible to provide an illuminating device that can cope with a case where the illuminance peak region deviates from the center of the irradiation region.

It is sectional drawing of the illuminating device concerning embodiment. It is a figure for demonstrating the light distribution state on the ground which the illuminating device 1 in connection with embodiment illuminates. It is a graph for demonstrating the luminous intensity distribution of the illuminating device 1 in connection with embodiment. It is a figure which shows the irradiation surface distribution of the illuminating device which has a luminous intensity distribution like the graph G2 in connection with embodiment. It is a figure which shows the irradiation surface distribution of the illuminating device 1 which has a luminous intensity distribution like the graph G1 in connection with embodiment.

  The present embodiment includes: a light emitting unit that emits illumination light; and a sighting device that can change an installation angle with respect to the light emitting unit according to a light distribution characteristic of the illumination light emitted from the light emitting unit.

  The light emitting unit includes a plurality of light emitters.

  Each light emitter is a light emitting diode.

  The sighting device is configured to increase an angle of an optical axis of the illumination light with respect to a normal direction of a region plane irradiated with the illumination light with respect to an aiming operation of the illumination light irradiation point by the sighting device. The installation angle is adjusted.

  The illumination device is a projector.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a cross-sectional view of a lighting device according to this embodiment.

  The illuminating device 1 is a projector and has an aiming device 2. The lighting device 1 is installed in a stadium or the like and irradiates light to a ground or the like.

  The illuminating device 1 is attached to the front surface of a plurality of light emitting units 11, a radiator 12 as a casing, and a plurality of, here seven, reflectors 13 attached to the radiator 12 and the radiator 12. Cover unit 14 and power supply unit 15.

  Each light emitting unit 11 has an LED element as a light emitting element. Each LED element is mounted on the substrate by a COB (Chip On Board) method or an SMD (Surface Mount Device) method.

  The radiator 12 has a bottom surface portion 12a, and further has a side wall portion 12b that forms a space for accommodating the plurality of light emitting portions 11 on the front side of the bottom surface portion 12a, and a plurality of heat dissipation surfaces on the rear side. Fins 12c are provided. The heat radiating body 12 is integrally formed of a lightweight member having excellent heat dissipation, such as aluminum or aluminum die casting.

  A plurality of light emitting portions 11 are thermally connected and fixed to the flat bottom surface portion 12a. The side wall part 12b is formed in a wall shape continuous over the entire circumference of the bottom surface part 12a. For example, the side wall part 12b includes six side parts and surrounds the entire periphery of the reflector 13 in a frame shape.

  Each reflector 13 has a cylindrical shape with both front and rear ends opened, and is formed in a parabolic shape that gradually increases in diameter from the rear side to the front side, and the inner surface, that is, the reflection surface has a mirror shape. A light emitting unit 11 is disposed at the center of each reflector 13.

  The cover part 14 includes a cover 14a as a cover part main body formed in, for example, a hexagonal plate shape by a member such as glass having translucency, and a hexagonal frame-like frame body 14b that holds an outer edge part of the cover 14a. And.

  In the power supply unit 15, for example, a plurality of power supplies are arranged in a matrix in a rectangular case, and a predetermined DC power supply is supplied to each light emitting unit 11.

  The sighting device 2 is supported by a support member 2 a whose sighting direction can be changed, and is installed on the radiator 12. The sighting device 2 is a device having two holes, a laser beam pointer or the like.

  Here, the sighting device 2 is fixed to the support member 2a by screws 2b. As will be described later, the aiming direction of the sighting device 2 can be changed by loosening the screw 2b. That is, the sighting device 2 can change the installation angle with respect to the plurality of light emitting units 11.

  The lighting device 1 is provided with an arm 16 (shown by a dotted line) for fixing to a structure such as a pole. The arm 16 is for fixing the lighting device 1 to a structure such as a pole at a predetermined position and angle. Here, the arm 16 has a U-shape that surrounds a part of the outside of the side wall portion 12b. Have.

  Illumination light from the illumination device 1 is emitted from the cover portion 14 in a predetermined optical axis direction.

  Here, the case where the illuminating device 1 illuminates, for example, the ground will be described.

  FIG. 2 is a diagram for explaining a light distribution state on the ground illuminated by the lighting device 1.

  The illumination device 1 is fixed to a pole P installed on the ground G, and is projected onto a part of a rectangular space S indicated by a two-dot chain line in FIG.

  The lighting device 1 is fixed to the tip of the pole P and illuminates a predetermined range. For example, the lighting device 1 is installed and fixed to the pole P at a height of 50 m from the ground G so that the emission direction of the illumination light is 20 degrees with respect to the vertical direction.

  Here, the luminous intensity distribution of the illumination device 1 is adjusted so that the illumination surface distribution of the illumination device 1 becomes a predetermined distribution. The luminous intensity distribution will be described later.

  As shown in FIG. 2, the illumination light is irradiated with an angle with respect to the ground G. That is, the illumination light is irradiated with an angle, not 0 degrees, with respect to the normal direction (vertical direction) of the area surface to which the illumination light is irradiated.

  Therefore, the illuminance peak area DLC in the illumination light irradiation area DL is shifted from the center of the irradiation area DL. This is because the illuminance peak area DLC moves closer to the illumination device 1 in the irradiation area DL because the illuminance peak area at the center of the projector using the LED is narrow. In FIG. 2, the aim of the sighting device 2 is aligned with the center C of the irradiation region DL, but the illuminance peak region DLC is closer to the pole P side.

  Then, since the sighting device 2 of the illuminating device 1 of this embodiment can change the installation angle with respect to the heat radiator 12, it can change an aim.

  As shown in FIG. 2, how much the installation angle of the sighting device 2 with respect to the radiator 12 is corrected or changed to determine whether the illuminance peak area DLC coincides with the point C on the ground G where the aim is set. It is possible to know in advance by calculation according to the height at which 1 is installed, the emission angle of illumination light with respect to the vertical direction (or horizontal direction), and the light distribution characteristics.

  The adjuster who installs the illumination device 1 corrects or changes the installation angle of the sighting device 2 with respect to the radiator 12 by the correction value θ of the installation angle.

  That is, the sighting device 2 can change the installation angle with respect to the light emitting unit 11 according to the light distribution characteristic of the illumination light emitted from the light emitting unit 11. Therefore, when the aim of the aiming device 2 is set to the point C that is the center of the irradiation region DL, the angle of the aiming device 2 with respect to the illumination device 1 is such that the illuminance peak region DLC coincides with the point C on the ground G. Only the correction value θ is changed.

  Therefore, according to the height of the pole P, the emission angle of the illumination light with respect to the ground G, and the light distribution characteristics of the illumination device 1, the correction value θ of the angle of the sighting device 2 with respect to the illumination device 1 is compiled beforehand in a table or the like. The adjuster who adjusts the illumination light obtains an angle correction value according to the height, the emission angle, and the light distribution characteristic at which the illumination device 1 is installed with reference to the table. The installation angle of the sighting device 2 is adjusted.

  When the aim is determined using the aiming device 2 of the illumination device 1 in which the angle of the aiming device 2 is adjusted, the illuminance peak region DLC can be positioned at the position where the aim is determined.

  As a result, in the case of FIG. 2, when the sighting device 2 is aimed at the point C, the sighting direction TD of the sighting device 2 and the emission direction La of the illumination light are different, but the illuminance peak region DLC is at the point C. Will be located.

  Next, the light intensity distribution of the lighting device 1 will be described. In order to suppress glare, it is desirable to adjust the light distribution characteristics in the irradiation region.

  FIG. 3 is a graph for explaining the luminous intensity distribution of the lighting device 1. FIG. 3 is a diagram illustrating the luminous intensity according to the angle of the illumination light with respect to the optical axis. The vertical axis in FIG. 3 is the luminous intensity (candela), and the horizontal axis is the illumination light emission angle when the center of the illumination light emission direction is 0 degree. Graphs G1 and G2 in FIG. 3 show luminous intensity distributions in two illumination devices that obtain the same luminous flux. Graph G2 shows an example of a light intensity distribution with a relatively high peak light intensity.

  FIG. 4 is a diagram showing the irradiation surface distribution of the illumination device having the luminous intensity distribution as shown in the graph G2. In FIG. 4, a large ellipse indicated by a two-dot chain line indicates an illumination range, and within the illumination range, the illuminance is higher in the smaller ellipse. When the illumination device 1 has a light intensity distribution as shown in the graph G2 in FIG. 3, as shown in FIG. 4, the illuminance peak value in the illuminance peak area DLC of the irradiation surface distribution of the irradiation area DL increases, and glare occurs. easy.

  On the other hand, the graph G1 shows a luminous intensity distribution having a peak luminous intensity lower than that of the example of the graph G2 and having an irradiation surface distribution having a trapezoidal shape.

  The illuminating device indicated by the graph G1 has a constant luminous intensity in the range from 5 degrees to 5 degrees from the center of the optical axis of the illumination light, and a luminous intensity that changes monotonously in the range from 5 degrees to 13 degrees. Is adjusted so that the illumination light has a trapezoidal light intensity distribution such that the light intensity becomes zero when the light intensity exceeds.

    When the illumination light of the illumination device 1 has a light intensity distribution as shown by the graph G1 in FIG. 3, the illumination light emitted from the illumination device 1 has a light distribution on the ground G as shown by the dotted line in FIG.

  FIG. 5 is a diagram showing an irradiation surface distribution of the illumination device 1 having a luminous intensity distribution as shown in the graph G1. In FIG. 5, a large ellipse indicated by a two-dot chain line indicates the illumination range, and in the illumination range, the illuminance is higher in a smaller ellipse or in an ellipse that is partially cut. When the illumination device 1 has a luminous intensity distribution as shown in the graph G1 of FIG. 3, as shown in FIG. 5, the illuminance peak is suppressed in the illuminance peak area DLC of the irradiation surface distribution of the irradiation area DL, and glare hardly occurs. .

  Therefore, glare can be suppressed by using an illumination device having an altitude distribution as shown in the graph G1 in FIG. Therefore, in the present embodiment, the amount of light emitted from each light emitting unit 11 is adjusted so that the luminous intensity distribution of the illumination device 1 becomes a graph G1.

  As mentioned above, according to embodiment mentioned above, the illuminating device which can respond when the illumination intensity peak area | region deviates from the center part of an irradiation area | region can be provided. As a result, the aiming time can be shortened.

  Furthermore, glare can also be suppressed by using the illumination device having the light intensity distribution as described above.

  Although several embodiments of the present invention have been described, these embodiments are illustrated by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Illuminating device, 2 ... Sighting device, 2a ... Supporting member, 2b ... Screw, 11 ... Light emission part, 12 ... Radiator, 12a ... Bottom part, 12b ... Side wall part, 12c ... Radiation fin, 13 ... Reflector, 14 ... cover part, 14a ... cover, 14b ... frame, 15 ... power supply part, 16 ... arm.

Claims (5)

A light emitting unit for emitting illumination light;
An sighting device capable of changing an installation angle with respect to the light emitting unit according to a light distribution characteristic of the illumination light emitted from the light emitting unit;
A lighting device.   The lighting device according to claim 1, wherein the light emitting unit includes a plurality of light emitters.   The lighting device according to claim 2, wherein each light emitter is a light emitting diode. The sighting device is configured to increase an angle of an optical axis of the illumination light with respect to a normal direction of a region plane irradiated with the illumination light with respect to an aiming operation of the illumination light irradiation point by the sighting device. The lighting device according to claim 1, wherein an installation angle is adjusted.   The lighting device according to claim 1, wherein the lighting device is a projector.

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