JP2012094332A - Light-distribution variable lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-distribution variable lighting device capable of changing an irradiating direction by switching a transparent state and a mirror surface state of a variable reflection section.SOLUTION: The light-distribution variable lighting device has: the variable reflection sections 3 capable of switching between a transparent state and a mirror surface state; and a light source 2. The plurality of variable reflection sections 3 are arranged along an optical axis of light from the light source 3, and irradiation directions can be changed by switching between the transparent state and the mirror surface state of the variable reflection section 3. Further, the plurality of variable reflection sections 3 are arranged at different angles against the optical axis.

Description

  The present invention relates to a variable reflection portion that can switch between a transparent state and a mirror surface state, and a light distribution variable lighting fixture having a light source.

  Conventionally, a lighting device using a light control material as disclosed in Patent Document 1 is known. This illuminating device includes a light control mirror layer that converts physical properties between a mirror surface state and a transparent state. The dimming mirror layer includes a rare earth metal hydride whose physical properties are converted into a mirror state and a transparent state by controlling an applied voltage. When the light control mirror layer is in a transparent state, a normal irradiation state is secured. On the other hand, when the light control mirror layer is in the mirror state, the irradiation range is controlled by mirror reflection, and an irradiation state different from the normal state is obtained.

JP 2005-56706 A

  However, in the illumination device using the light control material disclosed in Patent Document 1, only one light control mirror layer is disposed. Therefore, when the light control material is in a mirror state, the light is specularly reflected, and only an irradiation state different from the normal state is obtained. That is, there are only two irradiation directions.

  On the other hand, in order to ensure three or more irradiation directions only by arranging one dimming mirror layer, it is necessary to change the direction of the variable reflecting portion or the direction of the illumination device. In this case, a mechanism for changing the direction of the variable reflecting portion or the direction of the lighting device is required, and the lighting device has a complicated mechanism.

  This invention is made | formed in view of the said background art, The subject is providing the light distribution variable lighting fixture which can obtain three or more irradiation directions with a simple structure.

  In order to solve the above-mentioned problem, the light distribution variable luminaire of the present invention has a variable reflection portion that can switch between a transparent state and a mirror surface state, and a light source, and the light source is arranged in the optical axis direction of the light source. A plurality of variable reflectors are arranged, and the controller has a controller that can switch between the transparent state and the mirror surface state of the variable reflector.

  Further, it is preferable that the plurality of variable reflection portions are arranged at different angles with respect to the optical axis.

Further, an optical member that refracts or reflects light from the light source is disposed between the light source and the plurality of variable reflection units,
It is preferable that any one of a plurality of sets in which the plurality of variable reflecting portions are arranged is selected by the optical member.

  In addition, it is preferable that driving means for moving light from the light source is provided, and the driving means selects any one of the plurality of variable reflecting portions.

  The light distribution variable lighting fixture of the present invention can obtain three or more irradiation directions with a simple structure.

FIG. 1A is a perspective view of a variable light distribution type lighting fixture according to a first embodiment of the present invention. FIG. 1B is a schematic view showing an irradiation area of the variable light distribution type lighting fixture. FIG. 2: (a) Sectional drawing of the variable light distribution type lighting fixture which concerns on 2nd Embodiment of this invention (b) Schematic which shows an irradiation area | region FIG. 3: (a) Perspective view (b) Bottom view of the light distribution variable lighting fixture which concerns on 3rd Embodiment of this invention. FIG. 4 is a schematic diagram showing an irradiation region by a light distribution variable illumination device according to the third embodiment of the present invention.

[First Embodiment]
A light distribution variable lighting device 1 according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1: is the schematic which shows the irradiation area | region of the (a) variable light distribution type lighting fixture which concerns on 1st Embodiment of this invention, (b) light distribution variable type lighting fixture. The light distribution variable luminaire 1 of the present embodiment includes a variable reflection portion 3A and a variable reflection portion 3B that can switch between a transparent state and a mirror surface state, and a light source 2 in the optical axis direction of the light source 2. The variable reflection unit 3A and the variable reflection unit 3B are arranged, and includes a control unit that can switch between the transparent state and the mirror surface state of the variable reflection unit 3A and the variable reflection unit 3B.

  Further, the plurality of variable reflection portions 3 are arranged at different angles with respect to the optical axis.

  In addition, what was represented with the same number has the same component, and when it does not distinguish from each other, it shall show only with the numerical part of a code | symbol.

  The optical axis direction of the light source 2 is the direction of the optical axis immediately after exiting from the light source 2. Therefore, when the direction of the optical axis is changed by the variable reflection unit 3, the reflection unit 5, or the optical member 7, the optical axis direction of the light source 2 is not the changed direction of the optical axis.

  More details are as follows.

  As the light source 2, a fluorescent lamp, LED, organic EL, or the like is used. A dimming mirror is used for each of the variable reflector 3A and the variable reflector 3B. A magnesium / nickel alloy thin film, which is a thin film made of a rare earth metal hydride, is used for the dimming mirror. When the hydride is dehydrogenated, the metal state of the light control mirror changes. By this change in the metal state, the transparent state and the mirror surface state are switched to each other.

  A control unit 6 is provided as means for switching between the transparent state and the mirror surface state for each of the variable reflection unit 3A and the variable reflection unit 3B. Specifically, an electrochromic control unit 6 in which hydrogen ions are moved by an applied voltage is provided. A gas chromic control unit 6 in which hydrogen gas and oxygen gas are alternately exposed to the variable reflection unit 3 may be provided. When the variable reflector 3 is exposed to hydrogen gas, the variable reflector 3 is switched from the mirror surface state to the transparent state. On the other hand, when the variable reflector 3 is exposed to oxygen gas, the variable reflector 3 is switched from the transparent state to the mirror surface state.

  When light from the light source 2 is reflected by any one of the variable reflector 3A and the variable reflector 3B, and when the light from the light source 2 is reflected by another variable reflector 3 The variable reflecting portion 3A and the variable reflecting portion 3B are respectively arranged so as to irradiate directions different from those in FIG. Specifically, the variable reflection portion 3 </ b> A and the variable reflection portion 3 </ b> B are arranged at different angles with respect to the optical axis of the light source 2. That is, the variable reflection portion 3A and the variable reflection portion 3B are arranged at an angle that is not parallel to the optical axis of the light source 2.

  Each of the variable reflecting portion 3A and the variable reflecting portion 3B can switch between the transparent state and the mirror surface state, so that the light distribution variable lighting device 1 can change the irradiation direction.

  Specifically, when the variable reflecting portion 3A is in the mirror state, the light from the light source 2 is reflected by the variable reflecting portion 3A and irradiates the irradiation region 4A. When the variable reflecting portion 3A is in a transparent state, the light from the light source 2 passes through the variable reflecting portion 3A and travels toward the variable reflecting portion 3B. When the variable reflection part 3B is in a mirror state, the light from the light source 2 is reflected by the variable reflection part 3B and irradiates the irradiation region 4B. On the other hand, when the variable reflection portion 3A is in the transparent state and the variable reflection portion 3B is also in the transparent state, the light from the light source 2 passes through the variable reflection portion 3A and the variable reflection portion 3B, and irradiates the irradiation region 4Z. By arranging two variable reflection portions (the variable reflection portion 3A and the variable reflection portion 3B) in this way, three irradiation directions can be obtained.

  Even if each of the variable reflection portion 3A and the variable reflection portion 3B is disposed at the same angle with respect to the optical axis of the light source 2, three irradiation directions can be obtained.

[Second Embodiment]
Next, the light distribution variable lighting device 1 according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 2: is schematic which shows (a) sectional drawing (b) irradiation area | region of the (a) variable light distribution type lighting fixture which concerns on 2nd Embodiment of this invention. The light distribution variable lighting device 1 in the present embodiment is used by being provided on a ceiling in a general home or the like.

  In the present embodiment, the light distribution variable lighting device 1 includes a light source 2, variable reflecting portions 3A to 3D, and a reflecting portion 5A. The contents described in the first embodiment are omitted. For example, although actually provided, the control unit 6 is not shown.

  The variable reflecting portions 3A to 3D are arranged so as to irradiate downward. Further, the variable reflecting portions 3A to 3D are inclined in the direction of the light source 2. The variable reflection portion 3 arranged farther from the light source 2 is more greatly inclined with respect to the optical axis of the light source 2 from the state in which the variable reflection portions 3A to 3D are arranged perpendicularly. Specifically, the variable reflection unit 3D, the variable reflection unit 3C, the variable reflection unit 3B, and the variable reflection unit 3A are arranged in the order far from the light source 2 and are greatly inclined.

  In addition, the reflecting portion 5A is disposed in the optical axis direction of the light source 2 and at a position farther from the light source 2 than the variable reflecting portions 3A to 3D. By arranging the reflection part 5A in this way, the light from the light source 2 that has passed through the variable reflection parts 3A to 3D is reflected by the reflection part 5A. In addition, the variable reflection portion 3D is inclined more greatly than the state where the reflection portion 5A is arranged perpendicular to the optical axis of the light source 2.

  For example, a metal reflector, a milky white paint reflector, or the like is used as the reflector 5A.

  When the variable reflecting portion 3A is in the mirror state, the light from the light source 2 is reflected by the variable reflecting portion 3A and irradiates the irradiation region 4A. When the variable reflecting portion 3A is in a transparent state, the light from the light source 2 passes through the variable reflecting portion 3A and travels toward the variable reflecting portion 3B. When the variable reflection part 3B is in a mirror state, the light from the light source 2 is reflected by the variable reflection part 3B and irradiates the irradiation region 4B. When the variable reflecting portion 3A is in a transparent state and the variable reflecting portion 3B is also in a transparent state, the light from the light source 2 passes through the variable reflecting portion 3A and the variable reflecting portion 3B and travels toward the variable reflecting portion 3C. When the variable reflection portion 3C is in the mirror state, the light from the light source 2 is reflected by the variable reflection portion 3C and irradiates the irradiation region 4C. When the variable reflectors 3A to 3C are in a transparent state and the variable reflector 3D is in a mirror state, the light from the light source 2 is reflected by the variable reflector 3D and irradiates the irradiation region 4D. When the variable reflecting portions 3A to 3D are in a transparent state, the light from the light source 2 is reflected by the reflecting portion 5A and irradiates the irradiation region 4Y.

[Third Embodiment]
Next, a variable light distribution type lighting fixture 1 according to a third embodiment of the present invention will be described with reference to FIGS. 3 (a), 3 (b), and 4. FIG. FIG. 3: is (a) perspective view (b) bottom view of the light distribution variable lighting fixture 1 which concerns on the 3rd Embodiment of this invention. FIG. 4 is a schematic view showing an irradiation region by the light distribution variable illumination device 1 according to the third embodiment of the present invention. The light distribution variable luminaire 1 shown in FIG. 3 of the present embodiment has a plurality of sets of variable reflecting portions arranged in a plurality, and any one of the plurality of sets can be selected by changing the optical axis. The contents described in the first embodiment and the second embodiment are omitted. For example, the control unit 6 is actually provided but is not shown.

  In addition, an optical member 7 that refracts light from the light source 2 is disposed between the light source 2 and the plurality of variable reflection portions 3, and a plurality of sets in which the plurality of variable reflection portions 3 are disposed by the optical member 7. One of the groups is selected.

  Further, a driving unit 8 for moving the light source 2 is provided. By moving the light from the light source 2 by the driving unit 8, any one of a plurality of sets in which the plurality of variable reflecting portions 3 are arranged is formed. To choose.

  More specifically, in the present embodiment, the variable reflecting portion 3A, the variable reflecting portion 3B, and the reflecting portion 5A are arranged on a straight line in the order from the light source 2. Further, in the optical axis direction of the light source 2, the variable reflection unit 3 </ b> E, the variable reflection unit 3 </ b> F, and the reflection unit are arranged on the right side of the variable reflection unit 3 </ b> A, the variable reflection unit 3 </ b> B, and the reflection unit 5 </ b> A in FIG. 5B are arranged on a straight line. Further, in the direction of the optical axis of the light source 2 and on the left side of FIG. 3 of the variable reflection unit 3A and the 3B reflection unit 5A, the variable reflection unit 3G, the variable reflection unit 3H, and the reflection unit 5C are arranged in order from the light source 2, It is arranged on a straight line. Furthermore, the optical member 7 is provided between the light source 2 and the variable reflecting portions 3A to 3B and 3E to 3H. Further, the driving unit 8 is provided on the right side of the light source 2 in FIG. 3 and the driving unit 8 is driven so that the light source 2 is moved.

  Note that optical glass is used as the optical member 7.

  The inclination of the variable reflecting portion 3 is the same as that in the second embodiment. That is, the variable reflecting portion 3A, the variable reflecting portion 3B, and the reflecting portion 5A are arranged so as to irradiate downward. Furthermore, the variable reflecting portion 3A, the variable reflecting portion 3B, and the reflecting portion 5A are inclined in the direction of the light source 2. The variable reflecting portion 3 and the reflecting portion 5A arranged farther from the light source 2 are more greatly inclined from the state of being arranged perpendicular to the optical axis of the light source 2. Specifically, the reflecting portion 5A, the variable reflecting portion 3B, and the variable reflecting portion 3A are arranged farther from the light source 2 in this order, and are greatly inclined.

  Note that the variable reflector 3E, the variable reflector 3F, and the reflector 5B are the same as the variable reflector 3A, the variable reflector 3B, and the reflector 5A. Furthermore, the variable reflection unit 3G, the variable reflection unit 3H, and the reflection unit 5C are the same as the variable reflection unit 3A, the variable reflection unit 3B, and the reflection unit 5A.

  More specifically, the light source 2 is slid in the direction perpendicular to the optical axis of the light source 2 by the driving unit 8, and the light from the light source 2 is incident on A of the optical member 7. A is a position where the light from the light source 2 enters the variable reflecting portion 3G when it passes through. Therefore, the light from the light source 2 is refracted by the optical member 7, and the light from the light source 2 is directed to the variable reflection portion 3G. When the variable reflecting portion 3G is in the mirror state, the light from the light source 2 is reflected by the variable reflecting portion 3G and irradiates the irradiation region 4G. The irradiation area is described in FIG. When the variable reflection portion 3G is in a transparent state, light from the light source 2 passes through the variable reflection portion 3G and travels toward the variable reflection portion 3H. When the variable reflection portion 3H is in the mirror state, the light from the light source 2 is reflected by the variable reflection portion 3H and irradiates the irradiation region 4H. When the variable reflection portion 3G is in a transparent state and the variable reflection portion 3H is also in a transparent state, the light from the light source 2 passes through the variable reflection portion 3G and the variable reflection portion 3H, and travels toward the reflection portion 5C. The light from 2 is reflected by the reflecting portion 5C and irradiates the irradiation region 4W.

  When the light from the light source 2 is incident on B of the optical member 7, the light from the light source 2 is directed to the variable reflector 3A. B is a position where the light from the light source 2 enters the variable reflecting portion 3A. For this reason, when the variable reflection portion 3A is in the mirror state, the light from the light source 2 is reflected by the variable reflection portion 3A and irradiates the irradiation region 4A. When the variable reflecting portion 3A is in a transparent state, the light from the light source 2 is directed to the variable reflecting portion 3B. When the variable reflecting portion 3B is in the mirror state, the light from the light source 2 is reflected by the variable reflecting portion 3B and irradiates the irradiation region 4B. When the variable reflecting portion 3A is in a transparent state and the variable reflecting portion 3B is also in a transparent state, the light from the light source 2 is directed to the reflecting portion 5A, and the light from the light source 2 is reflected by the reflecting portion 5A and passes through the irradiation region 4Y. Irradiate.

  Similarly, when the light from the light source 2 is incident on C of the optical member 7, the light from the light source 2 is directed to the variable reflecting portion 3E. C is a position where the light from the light source 2 enters the variable reflecting portion 3E. Therefore, when the variable reflection portion 3E is in the mirror state, the light from the light source 2 is reflected by the variable reflection portion 3E and irradiates the irradiation region 4E. When the variable reflecting portion 3E is in the transparent state, the light from the light source 2 goes to the variable reflecting portion 3F. When the variable reflecting portion 3E is in the transparent state and the variable reflecting portion 3F is in the mirror state, the light from the light source 2 is reflected by the variable reflecting portion 3F and irradiates the irradiation region 4F. When the variable reflecting portion 3E is in the transparent state and the variable reflecting portion 3F is also in the transparent state, the light from the light source 2 is directed to the reflecting portion 5B, is reflected by the reflecting portion 5B, and irradiates the irradiation region 4X.

  If the light distribution variable lighting device 1 is designed so that the incident position on the optical member 7 is changed by moving the light source 2, the light from the light source 2 can irradiate a wider range. Therefore, the light distribution variable lighting device 1 is small and can irradiate a wide range.

  Note that a plurality of optical members 7 may be disposed between the light source 2 and the plurality of variable reflecting portions 3. By arranging a plurality of optical members 7, the light distribution variable luminaire 1 can irradiate a wider range.

  Further, the movement of the light source 2 is not only slid in the direction perpendicular to the optical axis of the light source 2 by the driving unit 8, but the direction of the light source 2 may be changed by the driving unit 8, for example. In this case, since the optical axis direction of the light source 2 is moved at the place where the light source 2 is installed, the light distribution variable luminaire 1 is further downsized.

  In addition, the optical member 7 may be moved without moving the light source 2, so that any one of a plurality of sets in which the plurality of variable reflection units 3 are arranged may be selected.

  In addition, the light from the light source 2 is reflected by the optical member 7, so that any one of a plurality of sets in which the plurality of variable reflection units 3 are arranged may be selected.

  At this time, a reflection member such as a metal reflector or a milky white paint reflector is used as the optical member 7.

  Further, even if the light source 2 is not moved by the driving means 8, any of the plurality of sets in which the plurality of variable reflection sections 3 are arranged may be selected by arranging three light sources 2.

  In addition, the optical member 7 is not provided, and three light sources 2 are arranged, and light from each light source 2 is directly incident on the variable reflection unit 3, and any one of a plurality of sets of the variable reflection units 3 arranged in a plurality is arranged. A set may be selected.

DESCRIPTION OF SYMBOLS 1 Light distribution variable lighting fixture 2 Light source 3 Variable reflection part 4 Irradiation area 5 Reflection part 6 Control part 7 Optical member 8 Driving means

Claims (5)

A variable reflection unit that can switch between a transparent state and a mirror state, and a light source;
A plurality of the variable reflection portions are arranged in the optical axis direction of the light source;
A light distribution variable lighting device having a control unit capable of switching between a transparent state and a mirror surface state of the variable reflection unit. The light distribution variable lighting device according to claim 1, wherein the plurality of variable reflecting portions are arranged at different angles with respect to the optical axis. Having a plurality of sets of the plurality of variable reflecting portions arranged,
3. The light distribution variable lighting device according to claim 1, wherein any one of the plurality of sets can be selected by changing the optical axis. An optical member that refracts or reflects light from the light source is disposed between the light source and the plurality of variable reflection units,
4. The light distribution variable lighting device according to claim 3, wherein any one of a plurality of sets in which the plurality of variable reflecting portions are arranged is selected by the optical member. Drive means for moving the light from the light source is provided;
The light distribution variable illumination device according to claim 3 or 4, wherein any one of the plurality of variable reflecting portions is selected by the driving means.

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