JP2013168277A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of changing an irradiation range by simply adjusting an irradiation direction by a light source and yet free from glare feeling.SOLUTION: The lighting device is provided with a reflector 11 and a light source module 12 arranged in opposition to the reflector 11 and having a linear light source extending along one direction. The reflector 11 includes a pair of reflection faces 16A, 16B which are directed to different directions, respectively, with a linear portion 15 facing the linear light source as a border, and the light source module 12 includes a plurality of light-emitting diodes 18 linearly arrayed to form the linear light source, and a substrate 19 on which the plurality of the light-emitting diodes 18 are mounted on a face opposed to the reflector 11, and moreover, directions of the light-emitting diodes 18 facing the reflector 11 can be changed within a prescribed range.

Description

  The present invention relates to a lighting device, and more particularly to a lighting device using a light emitting diode as a light source.

  Conventional indoor lighting devices often used fluorescent lamps, but in recent years, as an illumination lamp that reduces carbon dioxide (CO2), which is a cause of global warming, a light-emitting diode (hereinafter referred to as `` LED; The introduction of LED lighting using “Light Emitting Diode”) is increasing. However, since LED lighting is a point light source, when a direct illumination method (direct type) is adopted, a so-called “glare sensation” is produced in which a light source with a high brightness looks dazzling and dazzling. There is a problem.

  Also, in lighting using fluorescent lamps and LED lighting lamps, for example, when performing projector display indoors, turn off some of the lighting lamps arranged in the room and darken the projected surface. It is trying to display. If the room is still too bright and the display state is poor, it is necessary to darken the room.

  In addition, in an illuminating device using an LED illuminating lamp, a rotatable LED illuminating lamp in which LEDs are arranged on each surface of a substrate having a triangular cross section and a flat reflector are combined, and the LED illuminating lamp is combined. An LED illumination device that is capable of changing the incident direction of light by changing the incident angle of light applied to a reflecting surface by manually rotating the LED is known, for example, in Patent Document 1.

JP, 2011-124222, A.

  The LED illumination device described in Patent Document 1 has a structure in which an LED illumination lamp is manually rotated to change an incident angle of light irradiated on a reflection surface of a flat reflector. Therefore, since the change of the incident angle is limited to within one plane of 180 degrees, there is a problem that the irradiation range cannot be changed sufficiently wide. In addition, when installed on a high ceiling or the like, it is necessary to rotate the LED illumination lamp using a tall platform or the like, which is troublesome.

  Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide an irradiation apparatus that can easily adjust the irradiation direction by a light source to change the irradiation range and has no glare.

  The present invention has been proposed in order to achieve the above object, and the lighting device of the present invention includes a reflector and a linear light source that is disposed to face the reflector and extends along one direction. The light source module is provided, and the reflector has a pair of reflecting surfaces facing different directions with a linear portion opposed to the linear light source as a boundary, A plurality of light emitting diodes arranged in a straight line to form the linear light source, and a light emitting diode having a substrate for mounting the plurality of light emitting diodes on a surface facing the reflector, and facing the reflector This direction is configured to be variable within a predetermined range.

  According to this configuration, the angle of the pair of reflecting surfaces arranged with the linear portion facing the linear light source as a boundary can be changed from a planar shape to a V-shaped cross section with the linear portion as a boundary. . Thereby, the irradiation range at the time of rotating a light source module can be adjusted widely compared with the case of the flat reflective surface of a prior art, and only the optimal range can be irradiated. In addition, since the plurality of LEDs are arranged only on the surface of the substrate facing the reflector and the light reflected by the reflecting surface is irradiated, glare does not occur.

  The pair of reflecting surfaces are preferably arranged such that a central angle when viewed from the linear light source side is larger than 180 degrees.

  According to this configuration, the irradiation range can be adjusted over a larger range than in the prior art by adjusting the angle of the pair of reflecting surfaces to exceed 180 degrees.

  Moreover, it is preferable that each of the pair of reflecting surfaces is a flat surface.

  According to this configuration, each of the reflection surfaces is configured as a flat surface, whereby the light reflected by the reflection surface can be easily reflected in a predetermined direction.

  Moreover, it is preferable that the said light source module is comprised by the motor so that rotation rotation is possible.

  According to this configuration, the direction in which the light source module faces from a location far away from the light source module can be easily adjusted by remotely controlling the drive of the motor.

  Further, it is preferable that the motor is a stepping motor, and the light source module is rotated and held after the rotation by the stepping motor.

  According to this configuration, the direction in which the light source module faces can be finely adjusted using the stepping motor, and the holding after the adjustment can be easily performed using the rotational load of the motor or the like.

  According to the present invention, the irradiation range when rotating the light source module is finely and easily adjusted over a wide range compared to the case of a lighting device using a flat reflective surface of the prior art, It is possible to easily irradiate only the optimum range. Thereby, for example, when using a screen of a projector, it is possible to easily realize darkening only a part of a room with a single lighting device. In addition, a plurality of light emitting diodes are arranged only on the surface facing the reflector of the substrate, and the light reflected by the reflecting surface is irradiated, so there is no glare, and the light source is free from the light and glare. Can be irradiated with light.

It is a side view of the illuminating device which shows one Embodiment of the illuminating device which concerns on this invention, and shows it in the state which notched some covers. (a) is sectional drawing of the AA line shown in FIG. 1, (b) is a schematic diagram explaining the change of an irradiation range. It is a perspective view which shows the light source module and its peripheral structure in embodiment same as the above.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings.

  1 and 2 show a lighting device according to the present invention. FIG. 1 is a side view showing a state in which a part of a cover is cut away, and FIG. 2 (a) is an AA line shown in FIG. FIG. 2B is a cross-sectional view and is an explanatory view of an irradiation range in the illumination device.

  1 and 2, the lighting device 10 includes a reflector 11, a light source module 12 disposed so as to face the reflector 11, and a cover 13 disposed so as to cover the reflection surface of the reflector 11 and the light source module 12. And a pair of end plates 14A, 14B, etc., which support and integrate both ends of the reflector 11, the light source module 12, and the cover 13, respectively.

  The reflector 11 is an elongated columnar resin member having a substantially pentagonal cross section. The top side 15 (hereinafter referred to as “linear portion 15”) is opposed to the light source module 12, and is placed on the front surface of the light source module 12. Has been placed. Then, flat surfaces 16A and 16B formed by uniform flat surfaces are provided on the left and right sides of the linear portion 15 as a boundary. The pair of planes 16A and 16B are arranged in a state where the center angle when viewed from the light source module 12 side is larger than 180 degrees and inclined toward the outer side. Further, white paint is applied to the outer surfaces of the pair of flat surfaces 16A and 16B, and the flat surfaces 16A and 16B to which the white paint is applied are used as reflecting surfaces for reflecting light emitted from the light source module 12. Therefore, in the following description, the planes 16A and 16B are described as the reflecting surface 16A and the reflecting surface 16B, respectively.

  As long as the reflector 11 has a pair of reflecting surfaces 16A and 16B, the reflector 11 may not be a pentagonal cross section, but may be a triangle, for example, and is extended to the left and right sides of the line portion 15 as a boundary. Two flat plates may also be used. Furthermore, if the reflector 11 itself is a white body that easily reflects light, the white paint applied to the reflecting surfaces 16A and 16B can be omitted.

  The light source module 12 includes a plurality of LEDs 18, a substrate 19 in which the plurality of LEDs 18 are arranged in a straight line along the linear portion 15, and one end side and an end plate 14 </ b> A of the substrate 19. The motor 20 is interposed between the other end of the substrate 19 and the end plate 14B. In FIG. 3, in the light source module 12, a part of one end side of the substrate 19 is fixed to the rotation output shaft 20a of the motor 20 attached to the end plate 14A, and the rotation output shaft 20a and the substrate 19 are integrated. A rotating configuration is shown.

  The motor 20 is a stepping motor and rotates stepwise through a motor drive control circuit (not shown). In addition, the rotation is output via a speed reduction mechanism as necessary. Further, at the time of stoppage, the stop position is held by the rotation load of the speed reduction mechanism and the rotation load of the motor, and at the same time, the stop position of the substrate 19 after the rotation adjustment is performed. Hold.

  The holder 21 is a bearing member fixed to the inner surface of the end plate 14B, and rotatably supports the other end of the substrate 19. Therefore, both ends of the substrate 19 are stably held by the rotation output shaft 20a of the motor 20 and the holder 21, respectively. Although not shown, a rotary contact mechanism or the like is provided between the substrate 19 and the end plate 14A to supply current from the external power source to the substrate 19 to cause each LED 18 to emit light.

  The cover 14 is formed of a resin material in a bowl shape having a curved cross section. The cover 14 is disposed so as to cover the reflecting surfaces 16 </ b> A and 16 </ b> B of the reflector 11 and the entire outside of the light source module 12. Therefore, the cover 14 is light-transmitting so that light directly coming from the light source module 12 and light reflected by the reflecting surfaces 16A and 16B of the reflector 11 can be transmitted. If necessary, the surface of the cover 14 is provided with a diamond cut shape or the like so as to be light diffusive. A plate-shaped molding member 22 is attached to the left and right sides of the top of the cover 14, and both ends of the molding member 22 are detachably attached to the left and right end plates 14A and 14B, respectively. The cover 14 is attached to the reflector 11 and integrated with the reflector 11.

  Next, the effect | action of the illuminating device 10 which concerns on this invention is demonstrated as a case where it installs in the indoor ceiling which requires illumination. The lighting device 10 is attached by fixing the end plates 14A and 14B to the indoor ceiling, for example.

  And the illuminating device 10 has normally stopped the motor 20 by arrange | positioning the board | substrate 19 of the light source module 12 in the position shown with the code | symbol "N" in (a) of FIG. When the substrate 19 is disposed at the position indicated by the symbol “N”, the respective centers of the plurality of LEDs 18 mounted on the substrate 19 are disposed in direct opposition to the linear portion 15 of the reflector 11. Is in a state. The stop position of the motor 20 is held by a rotational load of the motor 20 and a rotational load such as a speed reduction mechanism.

  When each LED 18 is turned on when the substrate 19 is disposed at the position indicated by the symbol “N”, the light emitted from each LED 18 is incident on the left and right sides mainly across the linear portion 15, that is, one pair. Are substantially uniformly incident on the reflecting surfaces 16A and 16B. The incident light is reflected by the reflecting surfaces 16A and 16B, and the light passes through the cover 13 and irradiates the room. If the irradiation range in the left-right direction at this time is schematically shown, it becomes a range of (NR)-(NL) shown by a solid line in FIG. 2B, and is almost evenly distributed between (NR)-(NL). Irradiated.

  In this state, when the motor 20 is driven and the substrate 19 is rotated from the position indicated by the symbol “N” in FIG. 2A toward the position indicated by the symbol “R”, the direction of each LED 18 gradually increases. Adjustment is made to face the reflecting surface 16A. As the substrate 19 rotates, the light emitted from each LED 18 is distributed more in the direction toward the reflecting surface 16A than in the direction toward the reflecting surface 16B. In (b) of 2, it changes while gradually moving to the right side, and finally irradiates a range of (RR)-(RL) schematically shown by a one-dot chain line. When the desired irradiation state is obtained, when the motor 20 is stopped, the substrate 19 stops at that position, and the position is held by the rotational load of the motor 20 and a rotational load such as a speed reduction mechanism. In the irradiation range (RR)-(RL), the (RR) side is brighter than the (RL) side.

  Next, the motor 20 is driven in a state where the substrate 19 is at the position indicated by the symbol “N” or the position indicated by the symbol “R” in FIG. When the LED 18 is rotated toward the position indicated by the symbol “L”, the direction of each LED 18 is adjusted so as to gradually face the reflecting surface 16B side. And when the board | substrate 19 passes the position shown by code | symbol "N" and rotates to the position side shown by code | symbol "L", the light emitted from each LED18 will be on the reflective surface 16B side rather than the light which goes to the reflective surface 16A side. The amount of light that travels is more light distribution, and the irradiation range in the left-right direction changes while gradually moving to the left in FIG. 2B, and finally (LR) − ( LL). When the desired irradiation state is obtained, when the motor 20 is stopped, the substrate 19 stops at that position, and the position is held by the rotational load of the motor 20 and a rotational load such as a speed reduction mechanism. In the irradiation range (LR)-(LL), the ((LL) side is brighter than the (LR) side.

  The rotation of the substrate 19 may be stopped at an arbitrary position, or may be stopped once every time it is rotated to a predetermined angle such as 10 degrees, 20 degrees, and 30 degrees.

  Therefore, in the illuminating device 10 configured as described above, the pair of reflecting surfaces 16A and 16B arranged with the linear portion opposed to the linear light source as a boundary have different directions from each other with the linear portion 15 as a boundary. Since it is arranged in a V-shaped cross section, the irradiation range when the light source module is rotated can be adjusted wider than in the case of a conventional flat reflecting surface, and only the optimal range can be irradiated. it can. Thereby, when using the screen of a projector, for example, it is possible to easily realize that only a part of the room is darkened by the single lighting device 10.

  The plurality of LEDs 18 of the light source module 12 are disposed only on the surface of the substrate 19 facing the reflector 11, and the light of each LED 18 is applied to the reflecting surfaces 16 </ b> A and 16 </ b> B of the reflector 11 and reflected. Thus, a gentle natural light emission feeling can be obtained without causing a glare feeling.

  Further, since the rotation of the stepping motor 20 is used as a driving force to adjust the rotation of the substrate 19, remote control is possible and fine adjustment is possible. It can be easily performed by the load of the speed reduction mechanism or the like.

  In the above embodiment, the pair of reflecting surfaces 16A and 16B are arranged such that the angle of the reflecting surfaces is larger than 180 degrees, and the reflecting surfaces are different from each other with the linear portion 15 as a boundary. The structure arranged in a V-shaped cross section so as to face is described as an example. However, it is also possible to arrange the light source module 12 so that the reflecting surfaces are arranged in a V-shaped cross section smaller than 180 degrees facing inward directions.

  Further, the reflecting surfaces 16A and 16B can be curved surfaces instead of flat surfaces.

  Furthermore, the angle of inclination of the pair of reflecting surfaces 16A and 16B (in FIG. 2A, the reflecting surfaces 16A and 16B are reflectors of the substrate 19 in a state where the substrate 19 is disposed at the position indicated by the symbol “N”. The inclination angle with respect to a virtual plane parallel to the surface facing 11 is not necessarily the same. For example, in a room where a projector screen is installed, the inclination angle of the reflecting surface 16A (or 16B) located on the screen side is set to 0 (zero) degree, and the reflecting surface 16B (or 16A) located on the opposite side of the screen side is used. ) May be larger than 0 (zero) degrees.

  Moreover, although the said embodiment demonstrated the case where the illuminating device 10 was installed in a room ceiling, it is also possible to install on a wall surface or a floor surface or a table. In that case, the molding member 22 may be used as a mounting base for installation on a wall surface, a floor surface, or a table.

  Therefore, the present invention includes modifications and improvements as long as the object of the present invention can be achieved.

DESCRIPTION OF SYMBOLS 10 Illuminating device 11 Reflector 12 Light source module 13 Cover 14A, 14B End plate 15 Top side (linear part)
16A, 16B Reflective surface 17 White paint 18 LED (light emitting diode)
19 Substrate 20 Motor 20a Rotation output shaft 21 Holder 22 Mold member

According to this configuration, by adjusting beyond 180 degrees angle of the reflecting surface of a pair can be adjusted over an irradiation range greater range than the prior art.

Further, the light source module is rotating can configured by a motor, it is preferable.

1 and 2, the lighting device 10 includes a reflector 11, a light source module 12 disposed so as to face the reflector 11, and a cover 13 disposed so as to cover the reflection surface of the reflector 11 and the light source module 12. When one pair of end plates 14A to integrally supporting both ends of the reflector 11 and the light source module 12 and the cover 13, respectively, it is formed by 14B or the like.

The reflector 11 is an elongated columnar resin member having a substantially pentagonal cross section. The top side 15 (hereinafter referred to as “linear portion 15”) is opposed to the light source module 12, so Has been placed. Then, flat surfaces 16A and 16B formed by uniform flat surfaces are provided on the left and right sides of the linear portion 15 as a boundary. Plane 16A of a pair, 16B, the center angle is greater than 180 degrees, and are disposed in the inclined state facing outwardly from one another when viewed from the light source module 12 side. Further, a pair of plane 16A, the white paint are respectively applied to the outer surface of the 16B, using a plane 16A coated with the white paint and 16B as a reflecting surface for reflecting light emitted from the light source module 12. Therefore, in the following description, the planes 16A and 16B are described as the reflecting surface 16A and the reflecting surface 16B, respectively.

Note that the reflector 11, a pair of reflecting surfaces 16A, as long as it has a 16B, may be also e.g. triangle without a cross-sectional pentagonal, also be expanded to the left and right sides as a boundary line portion 15 Two flat plates may also be used. Furthermore, if the reflector 11 itself is a white body that easily reflects light, the white paint applied to the reflecting surfaces 16A and 16B can be omitted.

The cover 13 is formed of a resin material in a bowl shape having a curved cross section. The cover 13 is disposed so as to cover the reflecting surfaces 16 </ b> A and 16 </ b> B of the reflector 11 and the entire outside of the light source module 12. Therefore, the cover 13 is light-transmitting so that light directly coming from the light source module 12 and light reflected by the reflecting surfaces 16A and 16B of the reflector 11 can be transmitted. Further, if necessary, the surface of the cover 13 is provided with a diamond cut shape or the like to provide light diffusion. A plate-shaped molding member 22 is attached to the left and right sides of the top of the cover 13 , and both ends of the molding member 22 are detachably attached to the left and right end plates 14A and 14B, respectively. The cover 13 is attached to the reflector 11 and integrated with the reflector 11.

When the substrate 19 is disposed at a position indicated by the symbol "N", as each LED18 is lit, respectively, light emitted from each LED18 is incident on the right and left evenly across mainly the linear portion 15, i.e. a pair Are substantially uniformly incident on the reflecting surfaces 16A and 16B. The incident light is reflected by the reflecting surfaces 16A and 16B, and the light passes through the cover 13 and irradiates the room. If the irradiation range in the left-right direction at this time is schematically shown, it becomes a range of (NR)-(NL) shown by a solid line in FIG. 2B, and is almost evenly distributed between (NR)-(NL). Irradiated.

Claims (5)

A lighting device including a light source module including a reflector and a linear light source that is disposed to face the reflector and extends in one direction,
The reflector has a pair of reflecting surfaces facing different directions from each other with a linear portion facing the linear light source as a boundary,
The light source module has a plurality of light emitting diodes arranged in a straight line to form the linear light source, and a substrate on which the plurality of light emitting diodes are mounted on a surface facing the reflector, and the reflection An illumination device, wherein the direction of the light-emitting diode facing the body is variable within a predetermined range.   2. The lighting device according to claim 1, wherein the pair of reflection surfaces are arranged such that a central angle when viewed from the linear light source side is larger than 180 degrees.   The lighting device according to claim 1, wherein each of the pair of reflection surfaces is a flat surface.   The lighting device according to claim 1, wherein the light source module is configured to be rotatable by a motor.   The illumination apparatus according to claim 4, wherein the motor is a stepping motor, and the light source module is rotated and held after the rotation by the stepping motor.

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