Dappled sunlight simulation lighting device and art lighting device
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2026-05-18
AI Technical Summary
Existing lighting devices lack the ability to create an indoor environment that simulates the feeling of being outdoors, specifically in terms of providing a desired lighting pattern.
A dappled sunlight simulation lighting device with a light irradiation unit and light-transmitting units featuring concave and convex portions, allowing light to reach a target position without directly entering the units, and optionally incorporating a cover member to support and protect the light-transmitting units.
The device provides a desired lighting pattern that mimics dappled sunlight, enhancing the indoor space with a natural and varied lighting effect.
Smart Images
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Abstract
Description
Technical Field
[0001] The present disclosure relates to a dappled sunlight simulation lighting device and an art lighting device.
Background Art
[0002] There has been proposed a lighting device that projects projection light for projecting a preset projection image onto a predetermined area (see, for example, Patent Document 1).
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] In a lighting device, further improvement is required to create an indoor space where the outdoors can be felt.
[0005] An object of the present disclosure is to solve the above problems and provide a desired lighting pattern.
Means for Solving the Problems
[0006] A dappled sunlight simulation lighting device according to one aspect of the present disclosure includes a light irradiation unit that irradiates light, at least one light-transmitting unit that passes the light, and is provided with the at least one light-transmitting unit includes a light incident portion where the light, which is incident light, is incident, and a light exit portion that is separated from the light incident portion and passes the incident light, and has the light exit portion has at least one of a concave portion and a convex portion, A part of the light emitted from the light irradiation unit reaches a target position where the light emitted from the light transmissive unit reaches without entering the light transmissive unit. It is characterized by this. The dappled sunlight simulation lighting device according to another aspect of the present disclosure is a light irradiation unit that irradiates light, and at least one light transmissive unit that transmits the light and is provided with The at least one light transmissive unit has a light incident portion where the light, which is incident light, is incident, and a light exit portion that is spaced apart from the light incident portion and transmits the incident light and has The light incident portion has at least one of a concave portion and a convex portion, A part of the light emitted from the light irradiation unit reaches a target position where the light emitted from the light transmissive unit reaches without entering the light transmissive unit. It is characterized by this. The dappled sunlight simulation lighting device according to another aspect of the present disclosure is a light irradiation unit that irradiates light, and at least one light transmissive unit that transmits the light and is provided with The at least one light transmissive unit has a light incident portion where the light, which is incident light, is incident, and a light exit portion that is spaced apart from the light incident portion and transmits the incident light and has The light exit portion has at least one of a concave portion and a convex portion, The at least one light transmissive unit is a plurality of light transmissive units, The plurality of light transmissive units Partially in the direction along the straight line connecting the light irradiation unit and the target position where the light emitted from the light transmissive unit arrives are overlapping It is characterized by this. The dappled sunlight simulation lighting device according to another aspect of the present disclosure is a light irradiation unit that irradiates light, and at least one light transmissive unit that transmits the light and is provided with The at least one light transmissive unit has a light incident portion where the light, which is incident light, is incident, A light emitting portion that is spaced apart from the light incident portion and transmits the incident light, and having the light emitting portion has at least one of a concave portion and a convex portion, further comprising a cover member that covers the light emitting portion, the emitted light emitted from the at least one light transmissive portion passes through the cover member, the cover member supports the at least one light transmissive portion characterized in that. An art lighting device according to another aspect of the present disclosure is the dappled sunlight simulation lighting device, and a sheet irradiated with the light emitted from the dappled sunlight simulation lighting device characterized by having.
Effects of the Invention
[0007] According to the present disclosure, a desired lighting pattern can be provided.
Brief Description of the Drawings
[0008]
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Embodiments for Carrying Out the Invention
[0009] Embodiment 1. FIG. 1 is a diagram schematically showing a dappled sunlight simulation lighting device 100 according to Embodiment 1. The dappled sunlight simulation lighting device 100 has at least one light irradiation part 1 that irradiates light L1 and at least one light-transmitting part 2 that allows the light L1 to pass through. The dappled sunlight simulation lighting device 100 may be referred to as a lighting device. The dappled sunlight simulation lighting device 100 can be applied to, for example, a box-shaped movable meeting room, conference room, office, factory, hospital room, room, etc. The dappled sunlight simulation lighting device 100 may be installed on the ceiling or may be a lighting device such as a downlight.
[0010] The light irradiation part 1 has a light source such as a Light Emitting Diode (LED). The light irradiation part 1 may have an optical member such as a mirror or a lens in addition to the light source.
[0011] In the example shown in FIG. 1, the dappled sunlight simulation lighting device 100 has a plurality of light-transmitting parts 2. Each light-transmitting part 2 has a light incident part 21 where the incident light L1 enters and a light exit part 22 that allows the incident light L1 to pass through. The light exit part 22 is spaced apart from the light incident part 21. That is, at least one light-transmitting part 2 has a three-dimensional shape.
[0012] FIG. 2 is a diagram showing an example of the structure of the light-transmitting part 2. The region between the light incident portion 21 and the light emitting portion 22 may be a space, or there may be a member through which light passes. Each light transmitting portion 2 has at least one of the concave portion 211 and the convex portion 212. In the example shown in FIG. 2, the light transmitting portion 2 has a plurality of concave portions 211 and a plurality of convex portions 212.
[0013] The light transmitting portion 2 may have a three-dimensional shape including a flat surface, a curved surface, a protruding portion, or a refracting portion. For example, when the light transmitting portion 2 has a protruding portion or a refracting portion, these protruding portions or refracting portions may form the concave portion 211 or the convex portion 212.
[0014] The light incident portion 21 may have at least one of the concave portion 211 and the convex portion 212. The light incident portion 21 may have both the concave portion 211 and the convex portion 212. In the examples shown in FIGS. 1 and 2, the light incident portion 21 has a plurality of concave portions 211 and a plurality of convex portions 212.
[0015] The light emitting portion 22 may have at least one of the concave portion 211 and the convex portion 212. The light emitting portion 22 may have both the concave portion 211 and the convex portion 212. In the examples shown in FIGS. 1 and 2, the light emitting portion 22 has a plurality of concave portions 211 and a plurality of convex portions 212.
[0016] One or more concave portions 211, one or more convex portions 212, or a combination of the concave portion 211 and the convex portion 212 may be provided between the light incident portion 21 and the light emitting portion 22. In this case, the plurality of concave portions 211, the plurality of convex portions 212, or the combination of the concave portion 211 and the convex portion 212 may overlap between the light incident portion 21 and the light emitting portion 22.
[0017] At least one light transmitting portion 2 is, for example, a glass art component made of glass. The light transmitting portion 2 may be made of a resin such as acrylic.
[0018] According to the dappled sunlight simulation lighting device 100, it is possible to provide lighting patterns such as various desired dappled sunlight patterns.
[0019] At least one light-transmitting part 2 may have a plurality of colors. In other words, visible light of a plurality of wavelengths may exit from at least one light-transmitting part 2. Thereby, a dappled sunlight pattern having various colors can be formed at the target position P.
[0020] The incident light L1 incident on the light-transmitting part 2 is refracted and scattered at at least one of the light incident part 21 and the light exit part 22. In the light-transmitting part 2, there may be light absorption or light reflection. The emitted light L2 emitted from the light-transmitting part 2 (specifically, the light exit part 22) is irradiated onto the target position P. A part of the light emitted from the light irradiation part 1 may reach the target position P without entering the light-transmitting part 2. A pattern is formed at the target position P by the shadow of the light-transmitting part 2 and the emitted light L2.
[0021] The target position P is a position where the emitted light L2 reaches, such as a wall, a floor surface, a desk, a chair, a ceiling, a window, or a curtain.
[0022] The light-transmitting part 2 may be suspended from the ceiling or installed in the dappled sunlight simulation lighting device 100. For example, when the dappled sunlight simulation lighting device 100 has a case or a support member, the light-transmitting part 2 can be fixed by the case or the support member.
[0023] The plurality of light-transmitting parts 2 may completely overlap in the vertical direction or may partially overlap in the vertical direction. In this case, in the example shown in FIG. 1, the vertical direction refers to the direction along the straight line connecting the light irradiation part 1 and the target position P, and the horizontal direction refers to the direction perpendicular to the vertical direction.
[0024] In the example shown in FIG. 1, the plurality of light-transmitting parts 2 are arranged in the horizontal direction. As shown in FIG. 1, the gap between adjacent light-transmitting parts 2 may be a space. In this case, the light L1 passing through this space from the light irradiation part 1 reaches the target position P directly without passing through the light-transmitting part 2. Therefore, a pattern of non-uniform brightness distribution (for example, a dappled sunlight pattern) is formed at the target position P by the light L1 that does not pass through the light-transmitting part 2, the light L2 that passes through the light-transmitting part 2, and the shadow of the light-transmitting part 2.
[0025] One or more recesses 211, one or more protrusions 212, or a combination of a recess 211 and a protrusion 212 may be provided between the light incident portion 21 and the light exit portion 22. In this case, the one or more recesses 211 and the one or more protrusions 212 may be regularly arranged or irregularly arranged in the vertical direction. The positions of each of the plurality of recesses 211, the positions of each of the plurality of protrusions 212, or the positions of each combination of a recess 211 and a protrusion 212 may be offset from each other in the vertical direction.
[0026] The one or more recesses 211 and the one or more protrusions 212 may be regularly arranged or irregularly arranged in the horizontal direction.
[0027] The distance D from the light exit portion 22 of each light transmissive portion 2 to the target position P is non-uniform in the horizontal direction. With this configuration, a more natural dappled sunlight pattern can be formed.
[0028] The plurality of light transmissive portions 2 may be integrated as a single component. For example, the plurality of light transmissive portions 2 may form one downlight cover. The light transmissive portion 2 integrated as a single component may have at least one gap. Further, the light transmissive portion 2 integrated as a single component may be partially configured in a flat plate shape such that the angle of incidence of the light L1 on the light incident portion 21 is equal to the angle of emission from the light exit portion 22 (image of the integrated exposed portion cover member in FIG. 10 being in a flat plate shape).
[0029] FIG. 3 is a diagram showing an example of the dappled sunlight pattern formed at the target position P. In FIG. 3, an example of the dappled sunlight pattern formed at the target position P when viewed in the vertical direction from the dappled sunlight simulation lighting device 100 is shown, and the dappled sunlight simulation lighting device 100 when viewed in the horizontal direction is shown.
[0030] In this application, "sunlight filtering through trees" refers to the sunlight that penetrates through a grove of trees such as a forest or through branches and leaves. The sunlight filtering through trees simulation lighting device 100 forms a sunlight filtering through trees pattern, such as that formed by gaps between branches and leaves or overlapping leaves, at the target position P.
[0031] The sunlight filtering through trees pattern is, for example, a pattern formed on the ground by the following two principles. (1) Small circular patterns formed on the ground by sunlight that penetrates through numerous gaps formed between overlapping leaves, based on the same principle as a pinhole camera. (2) Patterns formed by the diffused light and shadows on the ground, caused by sunlight passing through and diffusing through multiple leaves, or by sunlight being blocked by small branches or the like.
[0032] When the sunlight filtering through trees simulation lighting device 100 has a plurality of light-transmitting portions 2, the sunlight filtering through trees simulation lighting device 100 creates an environment similar to overlapping leaves, and the light emitted from the light irradiation portion 1 creates the following lighting effects. (1) The light from the light irradiation portion 1 directly penetrates into the space between the sunlight filtering through trees simulation lighting device 100 and the target position P through the gaps between adjacent light-transmitting portions 2, and the light from the sunlight filtering through trees simulation lighting device 100 directly hits the target position P such as the interior wall surface, floor surface, and tabletop. (2) Due to the fine concave portions 211 or convex portions 212 on the surface of each light-transmitting portion 2, the light transmitted through each light-transmitting portion 2 becomes scattered light, forming various patterns in the space between the sunlight filtering through trees simulation lighting device 100 and the target position P, or at the target position P. Also, when each light-transmitting portion 2 has, for example, a substantially cylindrical shape, each light-transmitting portion 2 can superimpose the light assuming the light blocked by tree branches and the light assuming the light scattered and transmitted from leaves and the like.
[0033] By combining these lighting effects, a pattern similar to sunlight filtering through trees can be created at the target position P such as the wall surface, floor surface, and tabletop.
[0034] FIG. 4 is a diagram showing the principle by which a sunlight filtering through trees pattern is formed at the target position P by the sunlight filtering through trees simulation lighting device 100. In the example shown in FIG. 4, each light-transmitting portion 2 arranged in the horizontal direction has a cylindrical shape (i.e., a circular cross-section along the horizontal direction). In the example shown in FIG. 4, another light-transmitting portion 2 is further superimposed on the light-transmitting portions 2 arranged in the horizontal direction. As shown in FIG. 4, by combining a plurality of light-transmitting portions 2, the concave portion 211 or the convex portion 212 shown in FIG. 2 can also be formed. In this case, a plurality of light-transmitting portions 2 can also be used as an integrated light-transmitting portion 2.
[0035] When the light L1 from the light irradiation unit 1 is greatly scattered by the light-transmitting portion 2, the shape of the light-transmitting portion 2 is formed as a shadow at the target position P. When enhancing the contrast of the dappled sunlight pattern, the light L1 from the light irradiation unit 1 preferably has a high degree of parallelism. As shown in FIG. 4, the light-transmitting portion 2 can superimpose the light assumed to be blocked by the branches of the trees and the light assumed to be scattered and transmitted from the leaves and the like.
[0036] FIG. 5 is a view of the dappled sunlight simulation lighting device 100 shown in FIG. 4 as viewed in the vertical direction. As shown in FIG. 5, a part of the light L2 that has passed through each light-transmitting portion 2 having a cylindrical shape (i.e., a circular cross-section along the horizontal direction) is greatly scattered, and light does not reach the target position P corresponding to these light-transmitting portions 2. Thereby, it becomes possible to form a shadow by the light-transmitting portion 2 at the target position P. Note that since a part of the scattered light also reaches the target position P, it becomes possible to form a blurred dappled sunlight pattern at the target position P.
[0037] As shown in FIG. 5, due to the shape of the light-transmitting portion 2, from the relationship between the direction of the light L1 from the light irradiation unit 1 (i.e., the irradiation direction) and the target position P, it becomes possible to form a dappled sunlight pattern obtained by projecting the light-transmitting portion 2 at the target position P.
[0038] FIG. 6 is a view showing another example of the light-transmitting portion 2. In the example shown in FIG. 6, each light-transmitting portion 2 arranged in the horizontal direction has a concave semi-cylindrical shape (i.e., a semi-circular cross-section along the horizontal direction is concave). Also in the example shown in FIG. 6, other light-transmitting portions 2 are further stacked on the light-transmitting portions 2 arranged in the horizontal direction. As shown in FIG. 6, by combining a plurality of light-transmitting portions 2, the concave portion 211 or the convex portion 212 shown in FIG. 2 can also be formed. In this case, the plurality of light-transmitting portions 2 can also be used as an integrated light-transmitting portion 2. When the light L1 from the light irradiation unit 1 is greatly scattered by the light-transmitting portion 2, the shape of the light-transmitting portion 2 is formed as a shadow at the target position P.
[0039] FIG. 7 is a view of the dappled sunlight simulation lighting device 100 shown in FIG. 6 seen in the vertical direction. In the example shown in FIG. 7, each light-transmitting portion 2 has a concave semi-cylindrical shape (i.e., a semi-circular cross-section along the horizontal direction is concave). Also in this case, the light L2 that has passed through each light-transmitting portion 2 is greatly scattered, and light does not reach the target position P corresponding to these light-transmitting portions 2.
[0040] As shown in FIG. 7, due to the shape of the light-transmitting portion 2, from the relationship between the direction of the light L1 (i.e., the irradiation direction) from the light irradiation unit 1 and the target position P, it is possible to form a dappled sunlight pattern projected by the light-transmitting portion 2 at the target position P.
[0041] FIG. 8 is a view showing still another example of the light-transmitting portion 2. In the example shown in FIG. 8, each light-transmitting portion 2 arranged in the horizontal direction has a semi-cylindrical shape (i.e., a semi-circular cross-section along the horizontal direction). When the light L1 from the light irradiation unit 1 is greatly scattered by the light-transmitting portion 2, the shape of the light-transmitting portion 2 is formed as a shadow at the target position P. Note that, similar to FIG. 6, by combining a plurality of light-transmitting portions 2, the concave portion 211 or the convex portion 212 shown in FIG. 2 can also be formed.
[0042] FIG. 9 is a view of the dappled sunlight simulation lighting device 100 shown in FIG. 8 seen in the vertical direction. In the example shown in FIG. 9, each light-transmitting portion 2 has a semi-cylindrical shape (i.e., a semi-circular cross-section along the horizontal direction). Even in this case, the light L2 passing through each light-transmitting portion 2 is greatly scattered, and light does not reach the target position P corresponding to these light-transmitting portions 2.
[0043] The dappled sunlight simulation lighting device 100 may have the light-transmitting portion 2 shown in FIG. 4 and the light-transmitting portion 2 shown in FIG. 6. Further, the light-transmitting portion 2 shown in FIG. 4 and the light-transmitting portion 2 shown in FIG. 6 may be integrated as a single component. Each light-transmitting portion 2 is not limited to a cylindrical shape, a semi-cylindrical shape, or a concave semi-cylindrical shape, and may have a shape other than these shapes. For example, each light-transmitting portion 2 may be a donut-shaped light-transmitting portion 2.
[0044] Embodiment 2. FIG. 10 is a diagram schematically showing the dappled sunlight simulation lighting device 200 according to Embodiment 2. The dappled sunlight simulation lighting device 200 according to Embodiment 2 further includes a cover member 30. The dappled sunlight simulation lighting device 200 according to Embodiment 2 is different from Embodiment 1 in that it has a cover member 30, and the configuration described in Embodiment 1 is applicable to Embodiment 2.
[0045] The cover member 30 covers the light-emitting portion 22. Thereby, a dust-proof effect can be obtained. The emitted light L2 emitted from the light-transmitting portion 2 passes through the cover member 30. The light passing through the cover member 30 reaches the target position P, and a dappled sunlight pattern is formed at the target position P.
[0046] The cover member 30 may support at least one light-transmitting portion 2. Thereby, when the light-transmitting portion 2 is a glass art component, the cover member 30 can support the glass art component, and the installation of the glass art component becomes easy. The light-transmitting portion 2 is not limited to a glass art component, and may be made of a resin such as acrylic.
[0047] The cover member 30 and at least one light-transmitting portion 2 may be integrally formed as a single component. In this case, the transmittance of the light-transmitting portion 2 may be equal to the transmittance of the cover member 30.
[0048] FIG. 11 is a view showing the light-transmitting portion 2 and the cover member 30 as viewed in the horizontal direction. As shown in FIG. 11, a gap G may be provided between the light-transmitting portion 2 and the cover member 30. Thereby, the number of portions contributing to refraction increases, and the types of sunbeam patterns can be increased. Further, the sunbeam pattern can be adjusted by adjusting the shape of the gap G between the light-transmitting portion 2 and the cover member 30.
[0049] FIG. 12 is a view showing another example of the light-transmitting portion 2. As shown in FIG. 12, the light-transmitting portion 2 may have a linearly extending portion and a curved portion. With this structure, the light-transmitting portion 2 shown in FIG. 12 has at least one concave portion 211 and at least one convex portion 212. The light-transmitting portion 2 shown in FIG. 12 is also applicable to the light-transmitting portion 2 in Embodiment 1.
[0050] FIG. 13 is a view of a plurality of light-transmitting portions 2 and the cover member 30 as viewed in the longitudinal direction from the light irradiation unit 1. In the example shown in FIG. 13, a plurality of light-transmitting portions 2 are arranged on the cover member 30. The portion on the cover member 30 where the light-transmitting portion 2 is not arranged is the exposed portion 31. When the cover member 30 has the exposed portion 31, a part of the light L1 from the light irradiation unit 1 reaches the target position P by passing through the exposed portion 31 without passing through the light-transmitting portion 2.
[0051] The sunbeam simulation lighting device 200 according to Embodiment 2 also has the same advantages as the sunbeam simulation lighting device 100 described in Embodiment 1.
[0052] Embodiment 3. FIG. 14 is a view schematically showing an art lighting device 300 according to Embodiment 3. The art lighting device 300 includes the dappled sunlight simulation lighting device 100 according to Embodiment 1 or the dappled sunlight simulation lighting device 200 according to Embodiment 2, and a sheet 40 as a target position P. In the example shown in FIG. 14, the dappled sunlight simulation lighting device 100 according to Embodiment 1 is mounted on the art lighting device 300. However, the dappled sunlight simulation lighting device 200 according to Embodiment 2 may be mounted on the art lighting device 300 instead of the dappled sunlight simulation lighting device 100 according to Embodiment 1.
[0053] The light emitted from the dappled sunlight simulation lighting device 100 reaches the sheet 40. Thereby, the dappled sunlight pattern by the dappled sunlight simulation lighting device 100 is formed on the sheet 40 which is the target position P.
[0054] The sheet 40 is, for example, a cloth such as a curtain. Thereby, for example, by changing the shape of the sheet 40 by the wind from the air conditioner, the dappled sunlight pattern formed on the sheet 40 can be changed. The sheet 40 is not limited to cloth as long as it is a material that can be swayed by the wind. For example, the sheet 40 may be a sheet made of resin or a paper sheet.
[0055] The art lighting device 300 according to Embodiment 3 also has the same advantages as the dappled sunlight simulation lighting device 100 described in Embodiment 1 or the dappled sunlight simulation lighting device 200 according to Embodiment 2.
[0056] The features in each of the above-described embodiments can be combined with each other.
Description of Reference Numerals
[0057] 1 Light irradiation unit, 2 Light transmission unit, 21 Light incident unit, 22 Light emission unit, 30 Cover member, 31 Exposed portion, 40 Sheet, 100, 200 Dappled sunlight simulation lighting device, 211 Concave portion, 212 Convex portion, 300 Art lighting device, P Target position.
Claims
1. A light-emitting section that emits light, The light-transmitting portion and Equipped with The at least one light-transmitting portion is, The light incident section into which the incident light is incident, A light-emitting portion that allows the incident light to pass through is spaced apart from the light-incident portion. It has, The light-emitting portion has at least one of a recess or a convex portion. A portion of the light emitted from the light-emitting section reaches the target position to which the light emitted from the light-transmitting section is directed, without entering the light-transmitting section. A lighting device that simulates sunlight filtering through trees, characterized by the following features.
2. The light incident portion has at least one of a recess or a convex portion, as described in claim 1, for the dappled sunlight simulation lighting device.
3. The light-emitting portion has both the recess and the protrusion, as described in claim 1, for the dappled sunlight simulation lighting device.
4. The light incident portion has both a recess and a convex portion, as described in claim 1, for the dappled sunlight simulation lighting device.
5. A light-emitting section that emits light, The light-transmitting portion and Equipped with The at least one light-transmitting portion is, The light incident section into which the incident light is incident, A light-emitting portion that allows the incident light to pass through is spaced apart from the light-incident portion. It has, The light incident portion has at least one of a recess or a convex portion, A portion of the light emitted from the light-emitting section reaches the target position to which the light emitted from the light-transmitting section is directed, without entering the light-transmitting section. A lighting device that simulates sunlight filtering through trees, characterized by the following features.
6. The light incident portion has both the recess and the protrusion, as described in claim 5, for the dappled sunlight simulation lighting device.
7. The dappled sunlight simulation lighting device according to any one of claims 1 to 6, characterized in that the at least one light-transmitting section is a plurality of light-transmitting sections.
8. A light irradiation unit that irradiates light, The light-transmitting portion and Equipped with The at least one light-transmitting portion is, The light incident section into which the incident light is incident, A light-emitting portion that allows the incident light to pass through is spaced apart from the light-incident portion. It has, The light-emitting portion has at least one of a recess or a convex portion. The aforementioned at least one light-transmitting portion is a plurality of light-transmitting portions, The aforementioned multiple light-transmitting parts partially overlap. A lighting device that simulates sunlight filtering through trees, characterized by the following features.
9. The dappled sunlight simulation lighting device according to any one of claims 1 to 6, 8, characterized in that visible light of multiple wavelengths is emitted from at least one of the light-transmitting parts.
10. The dappled sunlight simulation lighting device according to any one of claims 1 to 6, 8, characterized in that the at least one light-transmitting portion has multiple colors.
11. The light emission portion is further provided with a cover member, The light emitted from at least one of the light-transmitting portions passes through the cover member. A lighting device that simulates sunlight filtering through trees, as described in any one of claims 1 to 6 or 8.
12. A light irradiation unit that irradiates light, The light-transmitting portion and Equipped with The at least one light-transmitting portion is, The light incident section into which the incident light is incident, A light-emitting portion that allows the incident light to pass through is spaced apart from the light-incident portion. It has, The light-emitting portion has at least one of a recess or a convex portion. The light emission portion is further provided with a cover member, The light emitted from at least one of the light-transmitting portions passes through the cover member. The cover member supports the at least one light-transmitting portion. A lighting device that simulates sunlight filtering through trees, characterized by the following features.
13. The dappled sunlight simulation lighting device according to claim 12, characterized in that the transmittance of at least one of the light-transmitting portions is equal to the transmittance of the cover member.
14. A lighting device simulating sunlight filtering through trees according to any one of claims 1 to 6, 8, or 12, The sheet onto which light emitted from the aforementioned dappled sunlight simulation lighting device is shone, An art lighting device characterized by having the following features.
15. The art lighting device according to claim 14, characterized in that the sheet is made of cloth.