JP2013026193A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device capable of restraining as much glare as possible, even when one's eyes are turned toward a light source direction.SOLUTION: The lighting device includes: a point light source arranged at a given position of a mirror face and emitting light of high directivity in a normal direction of the mirror face; and a sheet body consisting of a reflecting part arranged crossing an axis direction of light emitted from the point light source and reflecting the light emitted from the point light source toward the mirror face, and a transmission control part transmitting at least part of light reflected at the reflecting part and re-reflected at the mirror face. The reflecting part is to be arranged at a front position of the point light source.

Description

  The present invention relates to a lighting device that can suppress glare as much as possible even when viewed directly.

  Conventionally, various illumination devices are used to illuminate a predetermined object brightly.

  Among them, lighting devices using high-power LEDs, which are packaged by assembling a plurality of high-luminance LED elements as light sources, consume less power than conventional filament or fluorescent light sources. Since a large amount of light can be obtained, the range of use has been increasing year by year (for example, see Patent Document 1).

JP 2008-004519 A

  However, the conventional illuminating device including a light source that emits light having high directivity such as a high power LED has a problem in that when the line of sight is directed toward the light source, a very strong glare is felt.

  This invention is made | formed in view of such a situation, Comprising: Even if it is a case where a gaze is turned to the light source direction, the illuminating device which can suppress glare as much as possible is provided.

  In order to solve the above-described conventional problem, in the illumination device according to claim 1, a point light source disposed at a predetermined position on a mirror surface and emitting light having high directivity in a direction perpendicular to the mirror surface, and the point light source The light that is arranged to intersect the optical axis direction of the emitted light and reflects the light emitted from the point light source toward the mirror surface, and the light reflected by the reflection portion and re-reflected by the mirror surface A sheet body having a transmission control unit that transmits at least part of the light source, wherein the reflection unit is disposed at a front position of the point light source. .

  Moreover, in the illuminating device according to claim 2, in the illuminating device according to claim 1, the transmission control unit reflects the light re-reflected by the mirror surface again toward the mirror surface; and And having a transmission region that transmits light reflected by the mirror surface.

  Further, in the illumination device according to claim 3, in the illumination device according to claim 2, the transmission region is a circular through hole through which the light is transmitted, and the transmission hole is a radial shape centering on the point light source. And the reflection region is a region other than the through hole.

  The illumination device according to claim 4 is characterized in that, in the illumination device according to claim 2, the reflection region and the transmission region are arranged concentrically around the point light source.

  According to the first aspect of the present invention, a point light source that is disposed at a predetermined position on the mirror surface and emits light having high directivity in the direction perpendicular to the mirror surface, and an optical axis direction of the light emitted from the point light source are crossed. A reflection unit that reflects the light emitted from the point light source toward the mirror surface, and a transmission control unit that transmits at least part of the light reflected by the reflection unit and re-reflected by the mirror surface; And the reflector is arranged at the front position of the point light source, so that even if the line of sight is directed toward the light source, Can be provided as much as possible.

  In the present invention according to claim 2, the transmission control unit includes a reflection region that reflects the light re-reflected by the mirror surface toward the mirror surface again, and a transmission that transmits the light reflected by the mirror surface. Therefore, the light emitted from the lighting device is reflected at least once by the reflecting portion, and the object can be irradiated with as much light as possible.

  Further, in the present invention according to claim 3, the transmission region is a circular through-hole through which the light is transmitted, the through-hole is arranged radially around the point light source, and the reflection region is Since the area other than the through-hole is used, it is possible to uniformly irradiate the object with soft light attenuated by multiple reflections, and to impart excellent design to the light exit surface of the lighting device. it can.

  Further, in the present invention according to claim 4, since the reflection region and the transmission region are arranged concentrically around the point light source, the soft light attenuated by a plurality of reflections is uniformly applied to the object. Irradiation can be performed, and an excellent design can be imparted to the light exit surface of the lighting device.

It is explanatory drawing which showed the external appearance of the illuminating device which concerns on this embodiment. It is the disassembled perspective view which showed the structure of the illuminating device which concerns on this embodiment. It is explanatory drawing which showed the structure of the sheet | seat body. It is explanatory drawing which showed the behavior of the light in an illumination part. It is explanatory drawing which showed the structure of the sheet | seat body which concerns on a modification. It is explanatory drawing which showed the behavior of the light in the illumination part by which the sheet | seat body which concerns on a modification is arrange | positioned. It is explanatory drawing which showed the structure of the sheet | seat body which concerns on a modification. It is explanatory drawing which showed the structure of the illuminating device which concerns on other embodiment. It is explanatory drawing which showed the structure of the illuminating device which concerns on other embodiment.

  The present invention is arranged at a predetermined position on a mirror surface, and is disposed so as to intersect with a point light source that emits light having high directivity in a direction perpendicular to the mirror surface in the optical axis direction of the light emitted from the point light source, A sheet body having a reflection portion that reflects light emitted from a point light source toward the mirror surface, and a transmission control portion that transmits at least part of the light reflected by the reflection portion and re-reflected by the mirror surface; , Wherein the reflecting portion is disposed at a front position of the point light source.

  Here, the point light source is not particularly limited as long as the light source emits light having relatively high directivity, and for example, an LED, more preferably a high-intensity LED with high luminance can be used. As the high-brightness high-power LED, for example, an LED having a directivity of about 100 to 130 degrees and emitting a luminous flux of about 2500 to 5000 lumens can be used.

  In particular, when the point light source is a high-power high-brightness LED, it is preferable to attach a heat dissipation mechanism because the amount of heat generated during light emission increases. By setting it as such a structure, the lifetime of high power LED can be made longer.

  The point light source is arranged at a predetermined position on the mirror surface. That is, the point light source is arranged so as to be exposed from a hole or the like drilled at a predetermined position on the mirror surface, and the periphery of the point light source is configured to be surrounded by the mirror surface.

  In addition, the predetermined position of the mirror surface where a point light source is arrange | positioned is not specifically limited. For example, when only one point light source is used, it may be arranged at a substantially central portion of a mirror surface having a predetermined shape. Moreover, when using two or more point light sources, you may arrange | position in the position where between each point light source becomes equal.

  Further, the point light source is arranged so that the direction of the light emitted from the point light source is the normal direction of the mirror surface.

  However, the point light source used here is intended to have the emitted light spread in a relatively narrow conical region with the point light source as the apex, so that all the light is not necessarily parallel to the normal direction of the mirror surface. Need not be emitted. That is, the point light source in the present specification is not intended to be a light source that emits light that is extremely linear, such as laser light, and that is emitted almost only in the perpendicular direction.

  The sheet body includes a reflection portion and a transmission control portion, and is arranged so as to cross in the optical axis direction of the light emitted from the point light source.

  The sheet body is disposed at a predetermined distance from the point light source, and is disposed at a position where light other than scattered light (hereinafter also referred to as direct light) out of the light emitted from the point light source can be reflected toward the mirror surface. However, the optical axis direction of the light emitted from the point light source and / or the normal direction of the mirror surface and the normal direction of the sheet member are preferably arranged in parallel.

  The material of the sheet body is not particularly limited as long as it does not shrink or deform due to heat.

  Moreover, in the illuminating device which concerns on this embodiment, it is supposed that the reflection part provided in the sheet | seat body will be arrange | positioned in the front position of a point light source.

  With such a configuration, the direct light from the point light source can be efficiently reflected toward the mirror surface, and even when the user of the illumination device directs his line of sight toward the light source, it is intense. It is possible to prevent feeling dazzling.

  Moreover, you may arrange | position the wavelength-selective reflecting material which selects a predetermined wavelength and reflects on one side surface of the reflection part facing a point light source. By setting it as such a structure, a target object can be illuminated with the light of a predetermined wavelength (light of a predetermined color) among the lights radiate | emitted from the point light source.

  The transmission control unit is a part that transmits at least part of the light reflected by the reflection unit and re-reflected by the mirror surface. In other words, it can be said that the light emitted from the point light source transmits light other than direct light.

  The transmission control unit may be configured to include a reflection region that reflects the light re-reflected by the mirror surface toward the mirror surface again, and a transmission region that transmits the light reflected by the mirror surface. In other words, the transmission control unit may irradiate the object to be illuminated with all the light reflected by the mirror surface without providing a reflection region, and may illuminate a part of the light reflected by the mirror surface. An object may be irradiated, and the illumination target may be irradiated after the remaining portion is reflected again by the reflection region.

  The transmission region may be formed by perforating the sheet body, or may be formed of a transparent resin or the like that can transmit light having a wavelength emitted from the point light source. As described above, the hole-like portion that transmits the light emitted from the point light source regardless of the presence of a transparent resin or the like is collectively referred to as a through-hole.

  The shape of the through hole is not particularly limited, and may be a desired shape in plan view such as a circle, a rectangle, a triangle, or a star. Since the through hole is a part where the reflected light of the light from the point light source is emitted from the lighting device, the design can be improved by making the shape of the through hole in a plan view a desired shape.

  The through hole can be appropriately arranged at a desired position in the transmission control unit. For example, the point where the optical axis of the light emitted from the point light source intersects the sheet (hereinafter also referred to as the optical axis intersection) .) May be arranged radially except for the reflective portion.

  With such a configuration, light reflected by the reflecting portion can be sequentially emitted from the through-holes one by one, so that more uniform light can be irradiated onto the object.

  When the through holes are provided radially, the area of the through holes may be sequentially increased from the through hole close to the optical axis to the through hole far from the optical axis.

  By setting it as such a structure, much light can be radiate | emitted toward a target object also from the through-hole of the position away from the light source.

  Further, the reflection area and the transmission area of the transmission control unit may be arranged concentrically with the optical axis intersection as the center. In other words, a donut-shaped reflection region having a predetermined radius and a predetermined width and a donut-shaped transmission region having a predetermined radius and a different radius from the reflection region may be alternately arranged.

  Also with such a configuration, the light reflected by the reflecting portion can be sequentially emitted from the transmission region part by part, so that more uniform light can be irradiated onto the object.

  Further, the width of the doughnut-shaped reflection region may be gradually narrowed as the distance from the optical axis intersection increases. With such a configuration, even at a position far from the intersection of the optical axes, the amount of reflection can be reduced and the amount of transmission can be increased, and the amount of light can be made as uniform as possible regardless of the distance from the point light source. can do.

  Further, the width of the donut-shaped transmission region may be gradually increased as the distance from the optical axis intersection increases. In this case as well, the amount of transmission can be increased even at a position far from the optical axis intersection, and the amount of light can be made as uniform as possible regardless of the distance from the point light source.

  In addition, the width of the combination of the above-described structures, that is, the width of the donut-shaped reflection region is gradually narrowed as the distance from the optical axis intersection increases, and the width of the donut-shaped transmission region is gradually increased as the distance from the optical axis intersection increases. In this case, the amount of emitted light can be made more uniform.

  Hereinafter, the lighting device A according to the present embodiment will be described more specifically with reference to the drawings. FIG. 1 is an explanatory view showing the appearance of the lighting device according to the present embodiment, and FIG. 2 is an exploded perspective view showing the configuration of the lighting device.

  As shown in FIG. 1, the illumination device A according to the present embodiment is used for irradiating light on a stage such as a theater or a concert, and is directed toward an illumination target such as a person or a set on the stage. The device main body 1 having a substantially cylindrical shape that emits light and the hanging metal fitting 2 for suspending and mounting the device main body 1 on the ceiling.

  The suspension fitting 2 is attached to and fixed to a ceiling with a mounting seat portion 3, and a gate shape attached to the mounting seat portion 3 via a horizontal rotation shaft 4 so as to be rotatable around the axis of the horizontal rotation shaft 4. The left and right lower ends of the portal frame 5 are swingably connected to the left and right sides of the apparatus main body 1 via a vertical swinging portion 6 having a vertical swinging shaft 7. ing.

  Therefore, the apparatus main body 1 is swung in the horizontal direction by the horizontal rotation shaft 4 by the hanging metal fitting 2 and in the vertical direction by the vertical rocking shafts 7 of the vertical rocking portions 6 provided at both ends of the portal frame 5. It is possible.

  As shown in FIG. 2, the apparatus body 1 includes an illuminating unit 10 that emits light to illuminate an illumination target, a power supply unit 11 that supplies power to the illuminating unit 10, and the illuminating unit 10 and the power supply unit 11. It is comprised with the heat radiator 12 which thermally radiates the heat emitted.

  The illumination unit 10 includes a light source stay 14 including a light source unit 13, a sheet body 15 disposed in front of the light emitting direction of the light source unit 13, a cover plate 16 disposed further in front of the sheet body 15, and the sheet. The body 15 and the cover plate 16 are composed of a ring body 17 for integrally attaching to the light source stay 14.

  The light source stay 14 has a substantially cylindrical shape in appearance, and is provided with a light source portion 13 as a point light source that emits light at a substantially central portion of an end surface having a circular plane.

  A wall 18 is formed at the edge of the circular plane provided with the light source 13, and a male screw groove 19 is formed on the outer peripheral surface of the wall 18.

  The light source unit 13 is a high-power LED formed by packaging a plurality of high-luminance LED elements in an array, and when power is supplied from the power supply unit 11, light with high directivity is emitted from the circle. It arrange | positions so that it may radiate | emit by making the perpendicular direction of a shape plane into an optical axis.

  In addition, the peripheral part where the light source part 13 on the circular plane is arranged is a mirror part 20 that reflects light efficiently.

  As shown in FIG. 3, the sheet body 15 is provided at a substantially central portion when viewed from the front, and includes a reflecting portion 21 that is not formed with a through hole 23 surrounded by a broken line in the drawing, and a length outside the reflecting portion 21. It is a donut-shaped region sandwiched between broken lines, and is configured with a transmission control unit 22 provided with a plurality of through holes 23. Note that FIG. 3 shows the sheet body 15 as viewed from the light source unit 13 side, and the part indicated by shading indicates that mirror finishing is performed.

  The reflection unit 21 is a part that reflects the light emitted from the light source unit 13 toward the mirror surface unit 20 of the light source stay 14, and is disposed at a front position of the light source unit 13. The surface facing the light source unit 13 of the reflection unit 21 is mirror-finished over the entire surface. Further, the size of the reflecting portion 21 is formed wider than the region where the light (direct light) emitted from the light source portion 13 hits the sheet body 15.

  The transmission control unit 22 is a part that transmits at least part of the light reflected by the reflection unit 21 and re-reflected by the mirror surface unit 20, and directs the light re-reflected by the mirror surface unit 20 to the mirror surface unit 20 again. The reflection region 24 that reflects light and the transmission region 25 that transmits light reflected by the mirror surface portion 20 are configured. In the present embodiment, the transmission region 25 of the sheet body 15 is realized by the through hole 23 formed by drilling a hole in the sheet body 15, but is not limited thereto, and light is transmitted. It may be formed of possible transparent resin or the like.

  Returning to the description of FIG. 2, the cover plate 16 is a disk-shaped member formed of a transparent resin capable of transmitting light transmitted through the transmission region 25 of the sheet body 15, and the user directly touches the sheet body 15. The sheet body 15 is protected so as not to touch.

  The ring body 17 is a member having a substantially cylindrical shape. A female thread groove 26 is formed on the inner peripheral surface of the ring body 17 so as to be screwed into the male thread groove 19 of the light source stay 14, and the cover plate 16 and the sheet body 15 are accommodated in the ring body 17. The illumination part 10 is integrally formed by screwing the ring body 17 into the light source stay 14.

  The power supply unit 11 is a part that supplies power to the illumination unit 10 and is connected to the light source unit 13 by a power cable or the like (not shown). In addition, a drive circuit or the like for driving the light source unit 13 is accommodated in the power source unit 11, and the light source unit 13 is turned on by operating a switch (not shown) provided in the power source unit 11. It is configured to light up. The apparatus main body 1 may be configured to be driven by a battery built in the power supply unit 11, and an external power supply (for example, AC 100 V) is converted into a voltage by a step-down circuit provided in the power supply unit 11. You may comprise so that it may drive.

  The radiator 12 is a member for releasing heat generated when the light source unit 13 emits light and heat generated in the power supply unit 11, and a plurality of heat radiation fins 27 are provided.

  In addition, vertical swing bases 28 for attaching the portal frame 5 are formed on the left and right side portions of the radiator 12, and the apparatus main body 1 swings in the vertical direction via the vertical swing shaft 7 described above. It is configured as possible. That is, the vertical rocking portion 6 includes left and right lower ends of the portal frame 5, the vertical rocking shaft 7, and the vertical rocking pedestal 28.

  In the apparatus main body 1 having such a configuration, when the light source unit 13 is turned on by turning on the switch provided in the power source unit 11, the light emitted from the light source unit 13 is first as shown in FIG. It reaches the reflection portion 21 of the sheet body 15.

  Here, since the light emitted from the light source unit 13 has high directivity, almost all of the light (direct light) reaches a predetermined region on the reflection unit 21 facing the front face of the light source unit 13. Become. In the following description, a region on the reflecting portion 21 that is directly exposed to light is referred to as a direct light region S.

  Since the reflection part 21 is formed wider than the direct light region S as described above, almost all of the direct light is reflected by the reflection part 21 and goes to the mirror surface part 20. In other words, direct light is not emitted from the illumination unit 10, and even if the user views the direction of the light source unit 13 directly, for example, the direct light is not visually recognized. Thereby, it is possible to prevent the user from feeling intense glare.

  Further, the light that has reached the mirror surface portion 20 is reflected again at the respective reflection angles and travels toward the sheet body 15, but is transmitted like light indicated by a one-dot chain line on the left side of the light source portion 13 in FIG. 4. The light that reaches the region 25 is emitted from the illumination unit 10 as it is, and irradiates the object.

  In addition, like the light indicated by the alternate long and short dash line on the right side of the light source unit 13 in FIG. 4, the light reaching the reflection region 24 of the sheet body 15 is reflected again toward the mirror surface unit 20. Such light is also repeatedly reflected a plurality of times between the sheet body 15 and the mirror surface portion 20, and eventually reaches the transmission region 25 and is emitted from the illumination unit 10.

  As described above, since the lighting device A according to the present embodiment has the above-described configuration, the direct light emitted from the light source unit 13 is blocked by the reflecting unit 21, and thus the line of sight is directed toward the light source direction. Even if it is a case, glare can be suppressed as much as possible.

  Moreover, the light emitted from the light source unit 13 is emitted after being reflected by the reflecting unit 21 once, so that the light emitted from the illumination unit 10 can be made soft and dazzling. It becomes possible to suppress as much as possible.

  Next, an example in which the sheet body is modified will be described below as a first modification with reference to FIGS. 5 and 6. In the following description, the same components as those described above are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 5, the sheet body 30 according to the first modified example has substantially the same configuration as that of the above-described sheet body 15, but the through hole 23 as the transmission region 25 is provided in a portion excluding the reflection portion 21. The structures are different in that they are arranged radially around the optical axis intersection P.

  Further, as shown in FIG. 6, as the distance from the optical axis intersection P to the outer side in the radial direction increases, the diameter of the through holes 23 sequentially increases such that d <e <f <g <h. Another feature is that the edge of the hole 23 is tapered. Note that FIG. 5 shows the sheet body 30 as viewed from the light source unit 13 side, and the portion indicated by hatching indicates that mirror finishing is performed.

  With such a configuration, as shown in FIG. 6A, the light reflected by the reflecting portion 21 can be sequentially emitted from the through-holes 23 one by one, so that more uniform light is targeted. Can irradiate objects.

  Further, since the area of the through-hole 23 is sequentially increased from the through-hole 23 near the optical axis intersection P to the far-through hole 23, a large amount of light can be obtained from the through-hole 23 at a position away from the light source unit 13. Can be emitted toward the object.

  Further, as shown in FIG. 6B, an inner surface side taper portion 31 facing the mirror surface portion 20 and an outer surface side taper portion 32 facing the cover plate 16 are formed at the edge of the through hole 23. The inner surface side tapered portion 31 is mirror-finished.

  Therefore, when the light reflected by the mirror surface portion 20 such as the light L reaches the inner surface side tapered portion 31, it enters the mirror surface portion 20 at an angle different from the light L ′ having the same angle reaching the flat surface portion 33 of the reflection region 24. Therefore, the light emitted from the through-hole 23 can be made softer. In other words, it is possible to uniformly irradiate the object with soft light attenuated by a plurality of reflections.

  Moreover, since the outer surface side taper part 32 is provided in the edge part of the through-hole 23, compared with the case where the outer surface side taper part 32 is not provided, the light M which reached the through-hole 23 is edged. The light can be transmitted without hindering, and light can be emitted more efficiently.

  Moreover, the designability which was excellent in the light emission surface of the illuminating device A can be provided.

  Next, a further example in which the sheet body is modified will be described below as a second modification and a third modification with reference to FIG.

  A sheet body 40 shown in FIG. 7A includes a reflection unit 21 disposed on the front surface of the light source unit 13, and the transmission control unit 22 connects the reflection region 24 and the transmission region 25 to the optical axis intersection P. It is characterized in that it is arranged concentrically with the center.

  Further, the width of the transmission region 25 is gradually increased as the distance from the optical axis intersection P increases. By adopting such a configuration, it is possible to uniformly irradiate the object with soft light attenuated by a plurality of reflections, as in the case of the sheet body 30 described above, and a position far from the optical axis intersection point P. Even so, the amount of transmission can be increased, and the amount of light can be made as uniform as possible regardless of the distance from the light source unit 13. Moreover, the design property excellent in the light emission surface of an illuminating device can be provided.

  The sheet body 50 shown in FIG. 7B has a feature in that it includes a reflection unit 21 disposed on the front surface of the light source unit 13, and the transmission control unit 22 includes only the transmission region 25. .

  According to such a configuration, since direct light from the light source unit 13 is not emitted from the illumination unit 10, even when the line of sight is directed toward the light source, the glare is suppressed as much as possible. Can do.

  Next, a lighting apparatus B according to another embodiment will be described with reference to FIG. FIG. 8 is an explanatory diagram illustrating a state in which the illumination device B according to another embodiment is viewed obliquely from below.

  The lighting device B has substantially the same configuration as the lighting device A described above, but has a different structure in that the lighting device B is a downlight that is suspended from the ceiling and used to illuminate the floor surface direction.

  That is, the lighting device B includes a lighting unit 10 disposed in a state of facing the floor, a power source unit (not shown) that performs voltage conversion of power supplied to the lighting unit 10, and heat dissipation surrounding the power source unit. It has a truncated cone shape with a body 12 and is configured to be supplied with power by a power cable 60 extending upward from the truncated head 61.

  Even with the illumination device B having such a configuration, it is possible to suppress glare as much as possible even when the user looks up in the light source direction by looking up.

  Next, an illuminating device C according to still another embodiment will be described with reference to FIG. FIG. 9A is an explanatory diagram showing a state in which the illumination device C is viewed obliquely from below, and FIG. 9B is an exploded perspective view of the illumination device C. FIG.

  The illuminating device C shown in FIG. 9A is used to illuminate the floor surface direction by being installed on the ceiling surface, and the sheet body 71 provided in the illuminating unit 70 is shown in FIG. Four light control patterns 72 in which the transmission regions 25 are arranged radially are formed, and light is emitted from each of the light control patterns 72.

  Specifically, the illuminating device C includes a light source stay 74 including four light source units 13 arranged at a predetermined interval, a sheet body 71 on which four dimming patterns 72 are formed, and the sheet body 71. The sheet body 71 and the cover plate 73 are configured to be attached to a rectangular outer frame body 75 provided in the light source stay 74.

  In addition, the reflecting portion 21 in each dimming pattern 72 of the sheet body 71 is disposed so as to face directly in front of each light source unit 13 provided in the light source stay 74. The same effect as the sheet body shown in FIG. 5 is obtained.

  According to the lighting device C having such a configuration, for example, in a room such as a bedroom or a hospital room, even when there is a person lying on his back, it is possible to feel that this person is dazzling. The room can be illuminated while being suppressed.

  As described above, according to the illuminating device according to the present embodiment, a point light source (for example, a light source that emits light having high directivity in the normal direction of the mirror surface is disposed at a predetermined position on the mirror surface (for example, the mirror surface portion 20). , The light source unit 13) and a reflection unit (for example, the reflection unit 21) that is arranged so as to cross the optical axis direction of the light emitted from the point light source and reflects the light emitted from the point light source toward the mirror surface. ) And a transmission control unit (for example, the transmission control unit 22) that transmits at least part of the light reflected by the reflection unit and re-reflected by the mirror surface, for example, the sheet body 15), Since the reflecting part is arranged at the front position of the point light source, even if the line of sight is directed toward the light source, the glare is suppressed as much as possible. Can be a lighting device that can

  Finally, the description of each embodiment described above is an example of the present invention, and the present invention is not limited to the above-described embodiment. For this reason, it is a matter of course that various modifications can be made in accordance with the design and the like as long as they do not depart from the technical idea according to the present invention other than the embodiments described above.

  For example, the inner surface side taper portion 31 and the outer surface side taper portion 32 have been described with the sheet body 30 as a representative example. However, the present invention is not limited to this, and is applicable to, for example, the sheet bodies 15, 40, 50, 71, and the like. May be.

DESCRIPTION OF SYMBOLS 10 Illumination part 11 Power supply part 13 Light source part 14 Light source stay 15 Sheet body 16 Cover board 20 Mirror surface part 21 Reflection part 22 Transmission control part 23 Through-hole 24 Reflection area 25 Transmission area 30 Sheet body 40 Sheet body 50 Sheet body 70 Illumination part 71 Sheet body 72 Dimming pattern A Lighting device B Lighting device C Lighting device P Optical axis intersection

Claims (4)

A point light source arranged at a predetermined position on the mirror surface and emitting light having high directivity in the direction perpendicular to the mirror surface;
A reflector that is arranged so as to intersect the optical axis of the light emitted from the point light source and reflects the light emitted from the point light source toward the mirror surface, and is reflected by the reflector and re-appears on the mirror surface. A sheet body having a transmission control unit that transmits at least part of the reflected light, and a lighting device comprising:
The said reflection part is arrange | positioned in the front position of the said point light source, The illuminating device characterized by the above-mentioned.   2. The transmission control unit according to claim 1, further comprising: a reflection region that reflects the light re-reflected by the mirror surface toward the mirror surface again; and a transmission region that transmits the light reflected by the mirror surface. The lighting device according to 1.   The transmission region is a circular through-hole through which the light passes, the through-holes are arranged radially around the point light source, and the reflection region is a region other than the through-hole. The lighting device according to claim 2.   The lighting device according to claim 2, wherein the reflection region and the transmission region are arranged concentrically with the point light source as a center.

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