lighting equipment

Abstract

To provide a lighting system capable of easily changing an irradiation direction or an irradiation range of light, and capable of facilitating an empirical experiment in various illumination patterns.SOLUTION: A lighting system includes a light source 20 for emitting light, and irradiation adjustment means 30 capable of changing at least an irradiation direction or an irradiation range of light to the outside in an emission range of light from the light source 20.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a versatile lighting device, which is used for, for example, lighting a bathroom. [Background technology]

[0002] As one type of lighting device, there has been a field of bathroom lighting that is installed in a bathroom, for example. For example, Patent Document 1 discloses a bathroom lighting technology that includes a reflector and a lighting fixture that emits light toward the reflector, and the reflector is attached to the bathroom ceiling so that its angle is adjustable. With the technology of Patent Document 1, by changing the angle of the reflector, it is possible to freely switch between direct lighting that emits light toward the floor and indirect lighting that emits light toward the ceiling.

[0003] Furthermore, as an illumination device that can also be applied to bathroom lighting, for example, Patent Document 2 discloses a technology that includes a functional part that includes a reflector that reflects light and a light source, and a design part that includes a through-hole that irradiates light into a room and attaches the functional part to a wall, and that rotates the reflector around the light source to change its orientation.With the technology in Patent Document 2, by changing the orientation of the reflector, it was possible to adjust the irradiation direction of the light irradiated into the room from the through-hole in the design part. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Jpn. Published Application No. 4-110860 [Patent Document 2] Patent Publication No. 2013-243086 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the technology of Patent Document 1 mentioned above, while it is possible to change the direction of light irradiation toward the bathroom floor or ceiling by adjusting the angle of the reflecting mirror, it is difficult to adjust the range (size) of irradiation relative to the illuminated surface, i.e., the floor or ceiling. In particular, because the range of irradiation changes depending on the distance from the reflecting mirror to the illuminated surface and the angle at which the light is incident on the illuminated surface, it is extremely difficult to adjust the direction (position) of irradiation while keeping the illuminated range fixed at a certain area.

[0006] Furthermore, with the technology of Patent Document 2 described above, it was possible to adjust the direction of light irradiated into a room by rotating the reflector to change its orientation, but it was difficult to adjust the range (size) of light irradiated onto the illuminated surface such as the floor or ceiling, just like with the technology of Patent Document 1. Of course, with the technology of Patent Document 2, it was also very difficult to adjust the direction (position) of light while keeping the range of light irradiated onto the illuminated surface fixed at a certain area.

[0007] As described above, with conventional technology, it was difficult to adjust the range of light irradiation in addition to changing the direction of light irradiation on the illuminated surface. Therefore, for example, it was difficult to achieve lighting that would have a soothing effect on bathroom users by changing the direction and range of lighting in a bathroom.

[0008] The present invention has been made in response to the problems associated with the conventional technology described above, and aims to provide a lighting device that can easily change the direction or range of light emitted to the outside, and can easily realize a variety of lighting patterns. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, one aspect of the present invention is to provide a method for manufacturing a semiconductor device comprising: In a lighting device that irradiates light to the outside, A light source that emits light; The present invention is characterized by comprising an irradiation adjustment means capable of changing at least the direction or range of irradiation of light to the outside within the emission range of light from the light source. [Effects of the Invention]

[0010] According to the lighting device of the present invention, the direction or range of light emitted to the outside can be easily changed, and various lighting patterns can be easily realized. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a vertical cross-sectional view schematically illustrating a lighting device according to an embodiment of the present invention. [Figure 2] 1 is a schematic diagram illustrating a bathroom in which a lighting device according to an embodiment of the present invention is installed. [Figure 3] 1 is an explanatory diagram showing an example of light distribution control by an illumination adjustment unit of an illumination device according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a representative embodiment of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of the present invention. The lighting device 10 according to this embodiment emits light to the outside and includes a casing 11 forming an outer shell, a light source 20 that emits light, and a light irradiation adjustment means 30. Note that the components and shapes of the embodiment described below are examples of the present invention and do not limit the present invention. Furthermore, terms indicating directions such as up / down, front / back, left / right, etc. are used for convenience in describing the positional relationship of each part, and do not limit the installation posture of the lighting device 10.

[0013] <Outline of lighting device 10> The lighting device 10 according to this embodiment is a versatile lighting unit, and below we will explain an example of its application to bathroom lighting installed in a bathroom. As shown in Figure 2, a bathroom 1 is generally surrounded by wall panels on the front, back, left and right sides between the upper and lower floors 2 and the ceiling 3, and is equipped with a bathtub 8 and a washing area 9 inside. The wall panels are based on a front wall 4, which is the direction of the bathroom user's eyes when bathing in the bathtub 8, and are divided into a back wall 5 opposite the front wall 4 and a pair of side walls 6, 7 located on the left and right of the front wall 4 and facing each other.

[0014] Bathroom 1 has a door (not shown) on one side wall 6 facing the entrance, and bathtub 8 is installed on floor 2 along the other side wall 7. In addition, front wall 4 is provided with a counter 9a for washing area 9 and a mirror (not shown). Inside bathroom 1, lighting device 10 is attached to the upper end of front wall 4, and is installed in the corner where the front wall 4, ceiling 3, and other side wall 7 are adjacent, and is set to mainly illuminate the upper part of front wall 4 and ceiling 3, where bathroom users' eyes are directed when bathing.

[0015] <About Casing 11> As shown in FIG. 1, casing 11 forms the outer shell of lighting device 10, housing related components such as light source 20 and illumination adjustment means 30. Casing 11 is formed in a box-like shape from a thin plate of, for example, metal or resin. When installed on top of front wall 4 of bathroom 1, its top and back surfaces contact the ceiling 3 and front wall 4 of bathroom 1, respectively. Therefore, in practice, the top and back surfaces may be omitted, and the casing may be formed in a cover-like shape consisting of only front surface 12, bottom surface 13, and a pair of left and right side surfaces (not shown) that cover both ends. Casing 11 is waterproof enough to withstand use in bathroom 1.

[0016] As shown in Fig. 2(a), the casing 11 has a rectangular shape that is long in the left-right direction when viewed from the front, and as shown in Fig. 2(b), has a substantially square shape when viewed from the side. That is, the longitudinal directions of the front surface 12 and the bottom surface 13 of the casing 11 coincide with the left-right direction. The height direction of the casing 11 is perpendicular to the left-right direction, which is the longitudinal direction of the casing 11, and is parallel to the front surface 12. The front-rear direction of the casing 11 is perpendicular to the left-right direction of the casing 11 and is parallel to the bottom surface 13.

[0017] Space is provided inside the casing 11 to accommodate the light source 20, irradiation adjustment means 30, etc., which will be described later. Support structures for attaching the light source 20, irradiation adjustment means 30, etc. are provided inside both side surfaces of the casing 11 (not shown). Note that related parts such as a power supply circuit and control circuit for the light source 20 are arranged in appropriate positions inside or outside the casing 11 (not shown).

[0018] As described above, the casing 11 is made of a light-blocking material such as metal or resin, and is generally light-impermeable. However, one of the surfaces of the casing 11 is provided with windows 14, 15 that transmit light to the outside at multiple locations located in different directions relative to the internal light source 20. In this embodiment, a first window 14 covered with a cover made of a light-transmitting material such as glass or transparent resin is provided along the upper end side of the front surface 12, and a second window 15 similarly covered with a cover made of a light-transmitting material is provided along the rear end side of the bottom surface 13.

[0019] The upper edge of the first window section 14 is close to the ceiling 3 of the bathroom 1, and it extends left and right from one side section to the other side section at a predetermined height from its upper edge to the lower edge partway along the front section 12. The rear edge of the second window section 15 is close to the front wall 4 of the bathroom 1, and it extends left and right from its rear edge to the front edge partway along the bottom section 13 at a predetermined depth from its rear edge to the front edge partway along the bottom section 13. The covers that cover each window section 14, 15 are not limited to being colorless and transparent, but may be colored and transparent, and may also be made to diffuse and transmit light.

[0020] <About Light Source 20> As shown in Figure 1, light source 20 emits light within a predetermined emission range, and LEDs are suitable as light-emitting elements. Light source 20 is formed, for example, by arranging surface-mounted LED chips in a row at predetermined intervals on a narrow, elongated substrate. Since the configuration of the LED itself is common, detailed description will be omitted. However, it is preferable to use LED chips that emit light at a predetermined luminous intensity distribution angle centered on an optical axis perpendicular to the substrate. A wiring pattern to which the LEDs are electrically connected is formed on the mounting surface of the substrate.

[0021] It is preferable that the light source 20 can ensure a wide emission range with as few light-emitting elements as possible, but if the LEDs on one board are insufficient, for example, two boards may be combined back to back or arranged side by side at a predetermined angle. Alternatively, a straight-tube LED light capable of emitting light in all directions along the length of the straight tube may also be used as the light source 20. Furthermore, the light emission range of the light source 20 is not necessarily limited to a fixed direction, and it is also possible to make the light emission range variable by, for example, adjusting the orientation (angle) of the board of the light source 20.

[0022] The color of light emitted by the LED, which is the light-emitting element, can be selected arbitrarily, and is not limited to a single color, and multiple types of light colors can be appropriately combined. The LED may also be a full-color LED that can emit any color by mixing three primary colors. Furthermore, the LED is not limited to a surface-mounted LED chip, and may also be an LED lamp with a chip embedded in a dome-shaped mold. It is preferable to provide a control means that can control the specific light emission (e.g., light output, light color, etc.) of the light-emitting element in the light source 20.

[0023] Regardless of the type of light source 20, a suitable overall shape is a narrow one that is arranged to extend over substantially the entire length of the casing 11 in the longitudinal direction. As shown in Fig. 1, a light source 20 of this shape is attached to the casing 11 in a side view, at a position that is closer to the upper end of the front surface 12 in the up-down direction and closer to the rear end of the bottom surface 13 in the front-to-rear direction, and extends in the left-to-right direction, relative to the center of the side surface. In this embodiment, it is sufficient that the light emission range from the light source 20 arranged in this way is in a direction or size that can reach the entire area of ​​each of the windows 14, 15 in the casing 11.

[0024] <Regarding the irradiation adjustment means 30> 1, the irradiation adjustment means 30 is capable of changing at least the direction or range of light irradiation to the outside within the emission range of light from the light source 20. The irradiation adjustment means 30 according to this embodiment is formed, for example, in a cylindrical shape surrounding the light source 20 and includes two light shielding bodies 31 and 32 that overlap each other on the inside and outside. Note that the number of light shielding bodies 31 and 32 is not limited to two, and three or more may be combined so that they overlap each other on the inside and outside.

[0025] Each of the light blocking bodies 31, 32 is cylindrical in shape and has a length that surrounds the light source 20 from the outside over its entire length, and is designed so that the outer diameter of the inner side does not interfere with the inner diameter of the outer side, and is made of a light blocking material such as metal or resin. Each of the light blocking bodies 31, 32 is supported, for example, between both side surfaces of the casing 11 so as to be individually rotatable in the circumferential direction with its inner center line serving as a horizontal rotation axis.

[0026] Each of the light blocking bodies 31, 32 has an opening 33, 34 that transmits light provided in a portion of its peripheral wall. The opening 33 of the light blocking body 31 is formed in the shape of a slit with a predetermined width, and extends in the longitudinal direction from one end to the other end of the light blocking body 31. Similarly, the opening 34 of the light blocking body 32 is formed in the shape of a slit with approximately the same width as the opening 33, and extends in the longitudinal direction from one end to the other end of the light blocking body 32. It is not necessary to cover the openings 33, 34 of each of the light blocking bodies 31, 32 with a cover made of a light-transmitting material, as are the windows 14, 15 of the casing 11.

[0027] The direction and size of the overlapping opening area of ​​the openings 33, 34 of the light shielding bodies 31, 32 change depending on the rotation angle of the light shielding bodies 31, 32. That is, when the openings 33, 34 of the light shielding bodies 31, 32 are aligned, the area of ​​the range irradiated with light from the irradiation adjustment means 30 is maximized. On the other hand, when the openings 33, 34 of the light shielding bodies 31, 32 do not overlap at all, no light is irradiated from the irradiation adjustment means 30. The rotation of the light shielding bodies 31, 32 does not have to be manual; it is preferable to provide a drive mechanism driven by an electric force such as a motor. Here, if the drive mechanism is also controlled by the control means, the rotation angle of the light shielding bodies 31, 32 can be automatically adjusted.

[0028] 3, the irradiation adjustment means 30 adjusts the direction in which light is irradiated to the outside by adjusting the rotation angle when the openings 33, 34 of the light shielding bodies 31, 32 overlap. Furthermore, the range in which light is irradiated to the outside is adjusted by adjusting the degree of overlap between the openings 33, 34 of the light shielding bodies 31, 32. Here, the direction in which light is irradiated (hereinafter also referred to as "irradiation direction") is a concept that includes not only different general directions, but also finer directions toward different positions within the range of each general direction.

[0029] In the present embodiment, specifically, the "ceiling direction" passing through the first window 14 of the casing 11 toward the ceiling 3 of the bathroom 1 and the "front direction" passing through the second window 15 of the casing 11 toward the front wall 4 of the bathroom 1 are each rough directions. Furthermore, even within the ceiling direction, the ceiling direction is further subdivided between the direction in which light passing through the first window 14 illuminates the position on the ceiling 3 closest to the lighting device 10 and the direction in which light illuminates the position farthest from the lighting device 10. The front direction is similarly subdivided.

[0030] The range of light irradiation (hereinafter also referred to as "irradiation range") that can be changed by the irradiation adjustment means 30 is a concept that corresponds to the shape or area of ​​the area that is actually irradiated by light on the ceiling 3 or front wall 4 of the bathroom 1, which is the surface to be illuminated by the light. This irradiation range changes depending on the distance from the irradiation adjustment means 30 to the irradiated surface and the angle at which the light is incident on the irradiated surface, and is also restricted, such as being partially blocked, depending on the angle through the windows 14 and 15 of the casing 11. The direction of light irradiation and the change in the irradiation direction by the irradiation adjustment means 30 will be described in detail below.

[0031] The operation of the lighting device 10 according to the first embodiment will be described below. <Assembly of the lighting device 10> When assembling the lighting device 10, first, the light source 20 is attached to the casing 11 so that it extends in the longitudinal direction. Here, the light source 20 is oriented so that the windows 14, 15 on the two sides of the casing 11 are as close as possible to being within the range of the light distribution angle of each LED, which is a light-emitting element. The number of boards on which the LEDs are arranged is not limited to one, but minimizing the number of LEDs as much as possible can reduce costs.

[0032] Next, light shields 31 and 32 of the illumination adjustment means 30 are supported within the casing 11 so as to surround the light source 20 from the outside over the entire length. Here, each of the light shields 31 and 32 is individually rotatable in the circumferential direction, and it is preferable that the rotation angle be automatically adjusted by an electric drive mechanism. By adjusting the rotation angle of each of the light shields 31 and 32 in this way, even if the light source 20 itself has only a small number of LEDs, the direction or range of light irradiation outside the casing 11 can be changed, as will be described in detail below.

[0033] <Installation of lighting device 10> As shown in Figure 2, when lighting device 10 is used for bathroom lighting, it is installed in the corner where front wall 4 and ceiling 3 are adjacent to each other in order to primarily illuminate the upper part of front wall 4 and ceiling 3 of bathroom 1, where bathroom users' eyes are directed while bathing. Casing 11 can be attached to the upper end of front wall 4 using fasteners such as screws. Note that waterproofing that can withstand use in bathroom 1 must be considered not only for the structure of casing 11 itself but also for the mounting structure.

[0034] As shown in Figure 1, casing 11 has a first window 14 on front surface 12 that opens forward along ceiling 3 and perpendicular to ceiling 3, and a second window 15 on bottom surface 13 that opens downward along front wall 4 and perpendicular to front wall 4. The placement and size of these windows 14, 15 are designed taking into consideration the direction and range of light emitted from lighting device 10 to the outside. Note that the top and back surfaces of casing 11 contact the ceiling 3 and front wall 4 of bathroom 1, respectively, and therefore do not serve as illumination surfaces and may be omitted.

[0035] Of course, the specific installation location of lighting device 10 shown in Figure 2 is merely one example. For example, if the main surfaces to be illuminated are the front wall 4 and side wall 7 of bathroom 1, casing 11 would be installed in a corner where the front wall 4, side wall 7, and ceiling 3 are adjacent, with its longitudinal direction parallel to the vertical direction. In this installation, front portion 12 of casing 11 is perpendicular to front wall 4 along its longitudinal direction (vertical direction), and bottom portion 13 is not actually oriented as a bottom, but is perpendicular to side wall 7 along its longitudinal direction (vertical direction). In this way, the relative orientation of lighting device 10 changes depending on the installation location.

[0036] <Regarding Light Distribution Control of the Lighting Device 10> When the light source 20 in the lighting device 10 is turned on, the light distribution of the light emitted from the light source 20 is controlled by the irradiation adjustment means 30. This makes it possible for the lighting device 10 to easily change the direction or range in which light is irradiated to the outside of the casing 11.

[0037] 3 is an explanatory diagram schematically illustrating an example of light distribution control in the lighting device 10. In FIG. 3, (a) and (b) surrounded by dashed lines indicate adjustment of the illumination range (size), (b) and (c) surrounded by dashed lines indicate adjustment of the illumination position (illumination direction in the narrow sense), and (c) and (d) surrounded by dashed double-dashed lines indicate adjustment of the illumination direction. It should be noted that the rotation of each of the light blocking bodies 31 and 32 described below should preferably be powered by a drive mechanism as described above, and the direction of rotation and fine rotation angle should preferably be automatically controlled.

[0038] <<Change the irradiation range (size)>> As shown in Figure 3(a), when each of the light blocking bodies 31, 32 of the illumination adjustment means 30 is at the rotation angle shown in the figure, light from the illumination adjustment means 30 passes through the first window portion 14 of the casing 11. The light that passes through this first window portion 14 is irradiated over a wide range on the ceiling 3 of the bathroom 1, from a position close to the lighting device 10 to a position away from it.

[0039] At this time, openings 33, 34 of each light blocking body 31, 32 are aligned, and the opening area through which light is emitted from irradiation adjustment means 30 is at its maximum area. The lower end of the range of light emitted from this opening area passes through first window portion 14 of casing 11 and becomes approximately parallel to ceiling 3 of bathroom 1. Therefore, light from irradiation adjustment means 30 can be emitted over a wide band-like area extending horizontally on ceiling 3 to the end away from lighting device 10.

[0040] As shown in Figure 3(b), when the light blocking members 31, 32 of the illumination adjustment means 30 are rotated to the angle shown in the figure, the width of the opening area where the openings 33, 34 of the light blocking members 31, 32 overlap is slightly narrower than in Figure 3(a). The angle is set so that the upper end of the illumination range of light from this opening area is located near the upper frame of the first window portion 14 of the casing 11. Therefore, the light from the illumination adjustment means 30 is illuminated in a narrow area on the ceiling 3 of the bathroom 1, close to the lighting device 10.

[0041] In this way, the illumination adjustment means 30 controls the rotation angle of each light blocking body 31, 32 to adjust the size and orientation of the overlapping opening area of ​​each opening 33, 34, thereby freely changing the illumination range of light on the ceiling 3 of the bathroom 1. Note that the adjustment of the illumination range (size) of light by the illumination adjustment means 30 is not limited to the two steps illustrated in Figures 3(a) and (b), but can be adjusted continuously and steplessly.

[0042] <<Changing the irradiation position>> As mentioned above, when each of the light blocking bodies 31, 32 of the illumination adjustment means 30 is at the rotation angle shown in Figure 3(b), light from the illumination adjustment means 30 is irradiated over a predetermined range on the ceiling 3 of the bathroom 1 at a position close to the lighting device 10.

[0043] Next, as shown in Figure 3(c), when the light blocking members 31, 32 of the illumination adjustment means 30 are rotated to the angle shown in the figure, the width of the opening area where the openings 33, 34 overlap is significantly narrower than in Figure 3(a). The illumination range of light from this opening area is angled to pass through the middle of the first window portion 14 of the casing 11. Therefore, the illumination range of light from the illumination adjustment means 30 moves to a position on the same ceiling 3 of the bathroom 1 that is farther away from the lighting device 10. Here, the illumination range shown in Figure 3(c) and the illumination range shown in Figure 3(b) are each maintained at a constant area.

[0044] In this way, the illumination adjustment means 30 controls the rotation angle of each light blocking body 31, 32 to adjust the size and orientation of the overlapping opening area of ​​each opening 33, 34, thereby changing the illumination position (illumination direction in the narrow sense) while maintaining a constant area of ​​light illumination range on the ceiling 3 of the bathroom 1. Note that the adjustment of the light illumination position by the illumination adjustment means 30 is not limited to the two steps illustrated in Figures 3(b) and (c), but can be adjusted continuously and steplessly.

[0045] <<Changing the irradiation direction>> As mentioned above, when each of the light blocking bodies 31, 32 of the irradiation adjustment means 30 is at the rotation angle shown in Figure 3(c), light from the irradiation adjustment means 30 passes through the first window portion 14 of the casing 11 and is irradiated toward the ceiling 3 of the bathroom 1. Also, in Figures 3(a) and (b), light from the irradiation adjustment means 30 similarly passes through the first window portion 14 of the casing 11 and is irradiated toward the ceiling 3 of the bathroom 1.

[0046] On the other hand, as shown in Figure 3(d), when the light blocking members 31, 32 of the illumination adjustment means 30 are rotated to the angle shown in the figure, the opening area where the openings 33, 34 of the light blocking members 31, 32 overlap faces downward rather than forward. As a result, light from the illumination adjustment means 30 passes through the second window portion 15 of the casing 11 and is irradiated toward the front wall 4 of the bathroom 1. In the illumination direction shown in Figure 3(d), the illumination range (size) of the light can be changed in the same way as in the cases of Figures 3(a) and (b) described above, and the illumination position of the light can also be changed in the same way as in the cases of Figures 3(b) and (c) described above.

[0047] In this way, the illumination adjustment means 30 controls the rotation angle of each light blocking body 31, 32 to adjust the orientation of the opening area where the openings 33, 34 overlap, thereby freely changing the illumination direction of light outside the casing 11, such as illuminating the ceiling 3 of the bathroom 1 or illuminating the front wall 4, which is in a completely different direction from the ceiling 3. As mentioned above, it is also possible to change the illumination range (size) and illumination position for each separate illumination direction of the light.

[0048] <Other light distribution controls> The light emitted from the openings 33, 34 of the light shielding bodies 31, 32 in the irradiation adjustment means 30 may be adjusted so as to be emitted toward the periphery of the windows 14, 15 so as not to pass directly through the windows 14, 15 of the casing 11. In this way, the light that has passed through the irradiation adjustment means 30 leaks to the outside as indirect light from the windows 14, 15 of the casing 11.

[0049] That is, when the casing 11 is viewed from the outside, only the periphery of the window portions 14, 15 is illuminated dimly by indirect light reflected inside. In addition to illumination by such dim light, the illumination effect of the lighting can be further enhanced by controlling the light emission to change the color of the LED of the light source 20 in the light distribution control described above.

[0050] [Configuration and effects of the present invention] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. The present invention derived from the above-described embodiments will be described below.

[0051] First, the present invention provides a lighting device 10 that irradiates light to the outside, a light source 20 that emits light; and an irradiation adjustment means 30 that can change at least the direction or range of light emitted from the light source 20 to the outside within the emission range of the light.

[0052] As a result, even if the light source does not have a large number of light-emitting elements such as LEDs spread over a wide area, the limited light from the light source 20 can be freely changed in the direction of irradiation towards the outside and the range of irradiation towards the external irradiated surface by the irradiation adjustment means 30. If the direction or range of irradiation of the light can be continuously changed over time, it becomes easy to achieve, for example, illumination in which the center of gravity of the light moves.

[0053] With this illumination device 10, it is possible to easily achieve a lighting style that provides a soothing effect to bathroom users, for example, by appropriately adjusting the direction and range of light illumination in a bathroom. Of course, the illumination device 10 is not limited to the soothing effect of bathroom lighting, and can easily achieve light distribution control for various purposes depending on the installation location.

[0054] Furthermore, in the present invention, the irradiation adjustment means 30 is characterized in that it is possible to change the direction of irradiation while maintaining the range of light irradiation on one external irradiation surface at a constant area.

[0055] As a result, on a single illuminated surface, the area of ​​the illuminated range of light can be left unchanged, and only the illuminated position can be arbitrarily changed in accordance with the change in the illumination direction. Therefore, illumination is possible in which the size of the illuminated range remains fixed while the position is appropriately adjusted. The illuminated range of light changes depending on the distance from the illumination adjustment means 30 to the illuminated surface, the angle at which the light is incident on the illuminated surface, and other factors. However, adjustments by the illumination adjustment means 30 can be automatically controlled by taking these data into consideration in advance.

[0056] In the present invention, the irradiation adjusting means 30 is formed in a cylindrical shape surrounding the light source 20 and includes a plurality of light blocking bodies 31 and 32 overlapping each other on the inside and outside, The light blocking bodies 31 and 32 are individually rotatable in the circumferential direction, and have openings 33 and 34 in parts of their peripheral walls that allow light to pass through. The direction of light irradiation to the outside is changed depending on the rotation angle when the openings 33 and 34 of the light blocking bodies 31 and 32 overlap each other. The range of light irradiated to the outside can be changed depending on the degree of overlap between the openings 33 and 34 of the light blocking bodies 31 and 32.

[0057] In this way, the irradiation adjustment means 30 can be simply constructed by stacking cylindrical light shielding bodies 31, 32 surrounding the light source 20 on one another, without increasing costs, and can easily adjust the irradiation range or irradiation direction of the light that has passed through the irradiation adjustment means 30. In other words, the direction in which the openings 33, 34 of the light shielding bodies 31, 32 overlap determines the irradiation direction of the light, and the degree of overlap of the openings 33, 34 determines the irradiation range of the light.

[0058] The present invention also provides a casing 11 that surrounds the light source 20 and the irradiation adjustment means 30 to form an outer shell, The casing 11 is made of a light-blocking material and has windows 14 and 15 at multiple locations located in different directions from the light source 20, allowing light to pass through to the outside. The direction of the light passing through the irradiation adjusting means 30 is changed in units of the windows 14 and 15, The range of light irradiated from the windows 14, 15 onto the external surface to be irradiated is restricted by the angle at which the light passing through the irradiation adjusting means 30 passes through the windows 14, 15.

[0059] In this way, if the light source 20 and the irradiation adjustment means 30 are housed inside the casing 11, light is irradiated to the outside only through the windows 14, 15 in the casing 11. Therefore, the direction in which the light that has passed through the irradiation adjustment means 30 is irradiated to the outside can be changed by corresponding to each of the windows 14, 15.

[0060] Here, not all of the light that has passed through the irradiation adjustment means 30 necessarily passes through the inside of the windows 14, 15, and some of the light may be blocked by the window frame depending on the angle at which it passes through the windows 14, 15. In this way, the irradiation range of light from the windows 14, 15 and the irradiation adjustment means 30 overlap, and by utilizing this restriction of the irradiation range, it is possible to adjust the irradiation range of light on the irradiated surface.

[0061] Furthermore, the present invention is characterized in that the light that has passed through the irradiation adjustment means 30 is irradiated toward the periphery of the window portions 14, 15 without passing directly through the window portions 14, 15, and can also be used for illumination that leaks out to the outside as indirect light from the window portions 14, 15.

[0062] As a result, the light that has passed through the irradiation adjustment means 30 leaks to the outside as indirect light from the windows 14 and 15 of the casing 11. In other words, it is possible to realize an illumination pattern in which, when the casing 11 is viewed from the outside, only the areas around the windows 14 and 15 glow dimly due to indirect light reflected inside.

[0063] Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to the above-described embodiments, and modifications and additions that do not deviate from the gist of the present invention are also included in the present invention. For example, the installation location of the lighting device 10 is not limited to the corner of the bathroom 1 shown in Figure 2, and the use is not limited to bathroom lighting in the first place.

[0064] In addition, when the lighting device 10 is installed not in a household bathroom but in a large space such as a large bathhouse, the plurality of lighting devices 10 may be installed side by side in the longitudinal direction. Further, the light-emitting element constituting the light source 20 is not necessarily limited to an LED, and other semiconductor elements such as organic EL (OLED) may be used instead.

[0065] In addition, the specific shape of the casing 11 is not limited to the illustrated example. Also, although the casing 11 has been described as having light-shielding properties and not transmitting light except for its window portions 14 and 15, it is not necessarily limited to a light-shielding material and may be formed of a light-transmissive material such as translucent that can transmit some light.

[0066] Furthermore, the irradiation adjustment means 30 is not limited to being constituted by the light-shielding bodies 31 and 32. Also, the light-shielding bodies 31 and 32 are not necessarily limited to a cylindrical shape that surrounds the light source 20 in the entire circumferential direction, and may have a plate-like configuration that overlaps in a state of covering only the emission range of the light source 20 as described above.

Industrial Applicability

[0067] The lighting device according to the present invention is not limited to the use of bathroom lighting and can be widely used as general lighting in various installation locations.

Explanation of Reference Numerals

[0068] 1... Bathroom 2... Floor surface 3... Ceiling 4... Front wall 10... Lighting device 11... Casing 12... Front part 13... Bottom part 14... First window portion 15... Second window portion 20... Light source 30... Irradiation adjustment means 31... First light-shielding body 32... Second light-shielding body 33... Opening 34... Opening

Claims

1. In a lighting device that irradiates light to the outside, a light source that emits light; an irradiation adjusting unit that can change at least the direction or range of light irradiated to the outside within the emission range of light from the light source, the irradiation adjusting unit including a plurality of cylindrically formed light blocking bodies that surround the light source and overlap each other on the inside and outside; a drive mechanism that rotates each of the light blocking bodies by electric force; a control means for controlling the drive mechanism, Each of the light blocking bodies is individually rotatable in a circumferential direction, and has an opening in a part of a peripheral wall thereof through which light passes; The direction in which light is irradiated to the outside is changed depending on the rotation angle when the openings of the light blocking bodies are overlapped, The extent to which the openings of the light blocking bodies overlap each other changes the range in which light is irradiated to the outside, The lighting device is characterized in that the rotation angle of each of the light blocking members can be automatically adjusted by controlling the drive mechanism with the control means.

2. 2. The lighting device according to claim 1, wherein the illumination adjustment means is capable of changing the direction of illumination while maintaining a constant area of ​​the range of illumination of the light onto an external illumination target surface.

3. a casing that surrounds the light source and the irradiation adjustment means to form an outer shell; the casing is made of a light-blocking material and has a plurality of windows that are located in different directions from the light source, and allow light to pass through to the outside; The direction of the light that has passed through the irradiation adjustment means to be irradiated to the outside is changed for each window portion, 3. The lighting device according to claim 1, wherein the range of light irradiated from the window onto an external surface to be irradiated is regulated by the angle at which the light passing through the irradiation adjustment means passes through the window.

4. 4. The lighting device according to claim 3, wherein the light passing through the irradiation adjustment means is irradiated toward the periphery of the window without passing directly through the window, and is also capable of illuminating the area through the window as indirect light.

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