Illumination device

Abstract

This illumination device is capable of irradiating an object to be irradiated with one or more beams of spot illumination light, said illumination device comprising: a plurality of light sources; a control unit that selectively controls the plurality of light sources and thereby controls an illumination light pattern of at least one beam of spot illumination light with which the object to be irradiated is irradiated; and a plurality of optical bodies that irradiate the object to be irradiated with spot illumination light in which light output from each of the plurality of light sources has been subjected to light distribution control, in a manner achieving one-to-one correspondence. The respective focal distances of the plurality of optical bodies are longer or shorter than the distance between the illumination device and the object to be irradiated.

Description

lighting equipment

[0001] The present disclosure relates to a lighting device.

[0002] Illumination devices capable of emitting spot illumination light for indoor use, particularly for stores, have been known. These illumination devices are generally optically designed to emit spot illumination light using light-emitting diodes (LEDs) that emit illumination light with a narrow luminous intensity distribution angle, a light reflecting mirror, and an optical lens.

[0003] For example, Patent Document 1 discloses a spotlight that includes a main body with an opening formed on one side, a lens that covers the opening, a light source arranged within the main body, and a concave reflector that reflects light emitted from the light source and emits it from the opening.

[0004] JP 2009-129805 A

[0005] However, with the spotlight of Patent Document 1, when spot illumination light is to be irradiated at multiple points on an object to be illuminated, multiple units must be installed, which poses the problem of an increased installation area and increased costs due to the multiple spotlights.

[0006] Therefore, the present disclosure provides a lighting device that can suppress an increase in the installation area of ​​the lighting device and an increase in the cost required for lighting equipment in a space due to the increase in installation area.

[0007] An illumination device according to one aspect of the present disclosure is an illumination device capable of irradiating an illumination object with one or more spot illumination lights, and includes a plurality of light sources; a control unit that controls an illumination light pattern of the one or more spot illumination lights irradiated onto the illumination object by selectively controlling each of the plurality of light sources; and a plurality of optical bodies that irradiate the illumination object with the spot illumination lights, which are obtained by controlling the light distribution of light emitted from each of the plurality of light sources, in a one-to-one correspondence, wherein a focal length of each of the plurality of optical bodies is longer or shorter than a distance between the illumination device and the illumination object.

[0008] According to the lighting device of the present disclosure, it is possible to suppress an increase in the installation area of ​​the lighting device and an increase in the cost required for illuminating the space due to the increase in installation area.

[0009] Further advantages and effects of one aspect of the present disclosure will become apparent from the specification and drawings. Such advantages and / or effects are provided by some embodiments and features described in the specification and drawings, but not all of them necessarily need to be provided in order to obtain one or more identical features.

[0010] FIG. 1 is a diagram illustrating an internal structure of a lighting device according to an embodiment and an illumination light pattern of spot illumination light irradiated onto an irradiation object. FIG. 2 is a block diagram illustrating a lighting device according to an embodiment. FIG. 3 is a diagram illustrating an internal structure of a lighting device according to an embodiment and an illumination light pattern different from that of FIG. 1 on an irradiation object. FIG. 4 is a diagram illustrating an internal structure of a lighting device according to an embodiment and an illumination light pattern different from that of FIG. 3 on an irradiation object. FIG. 5 is a diagram illustrating an internal structure of a lighting device according to an embodiment and an illumination light pattern different from that of FIG. 4 on an irradiation object. FIG. 6A is a diagram illustrating an illumination mode of the lighting device on an irradiation object. FIG. 6B is a diagram illustrating a state in which a space is illuminated. FIG. 6C is a diagram illustrating a state in which a user sets an illumination mode of the lighting device on an irradiation object using an external device. FIG. 7 is a diagram illustrating a first illumination region and a second illumination region, and the illuminance of the first illumination region and the illuminance of the second illumination region. FIG. 8 is a diagram illustrating a case in which spot illumination light is irradiated onto an irradiation object. FIG. 9 is a diagram illustrating a case in which another spot illumination light is irradiated onto an irradiation object. FIG. 10 is a diagram illustrating a case in which yet another spot illumination light is irradiated onto an irradiation object. Fig. 11 is a diagram showing the internal structure of a lighting device according to Modification 1 and an illumination light pattern of spot illumination light irradiated onto an illumination object. Fig. 12 is a diagram showing the internal structure of a lighting device according to Modification 3 and an illumination light pattern on an illumination object different from that shown in Fig. 11. Fig. 13 is a perspective view showing a lighting device according to Modification 4. Fig. 14 is a perspective view showing a lighting device installed on a stand. Fig. 15 is a cross-sectional view showing the internal structure of a lighting device according to Modification 4. Fig. 16 is a block diagram showing a lighting device according to Modification 4. Fig. 17 is a block diagram showing a lighting device when connected to an external power source by wire. Fig. 18 is a block diagram showing a lighting device when connected to an external power source wirelessly.

[0011] Hereinafter, the embodiments will be specifically described with reference to the drawings.

[0012] The embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component placement and connection configurations, steps, and step order shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Furthermore, among the components in the following embodiments, components not described in independent claims are described as optional components.

[0013] In addition, each drawing is a schematic diagram and is not necessarily an exact illustration. In addition, the same components are denoted by the same reference numerals in each drawing.

[0014] (Embodiment) <Configuration> First, a lighting device 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG.

[0015] Fig. 1 is a diagram showing the internal structure of an illumination device 1 according to an embodiment and an illumination light pattern of spot illumination light irradiated onto an illumination object, and Fig. 2 is a block diagram showing the illumination device 1 according to an embodiment.

[0016] As shown in FIGS. 1 and 2 , the lighting device 1 is, for example, a spotlight, a downlight, or a bracket light. The lighting device 1 can be attached to, for example, indoor building materials such as ceilings, floors, and walls, or to a lighting rail, thereby illuminating the surrounding space in a store, facility, or the like. Specifically, the lighting device 1 is capable of irradiating one or more spot illumination lights onto an illumination target, and can illuminate the illumination target by irradiating the illumination target with the spot illumination lights. For example, the lighting device 1 can irradiate multiple spot illumination lights in a one-to-one correspondence with multiple illumination targets arranged in a space, illuminate the entire space, illuminate the entire surface of a specific wall in the space, or illuminate a portion of a wall. This can create an effect that makes the illumination target stand out.

[0017] The spotlight is a type of illumination light that can highlight the outline of an object by concentrating illumination on a part or the whole of the object. For example, the lighting device 1 can display content (images) such as letters, pictures, figures, signs, and patterns by illuminating the object with the spotlight.

[0018] Examples of objects to be irradiated include building materials such as ceilings, floors, and walls in facilities, exhibits displayed in art galleries and museums, products displayed in stores, people and / or crowds moving through aisles or standing still in a space, etc.

[0019] Next, a specific configuration of the lighting device 1 will be described.

[0020] Specifically, the lighting device 1 includes a light-emitting device 10 , a control unit 50 , a storage unit 51 , a communication unit 52 , a plurality of optical bodies 30 , a wavelength converter 20 , and a housing 40 .

[0021] The light-emitting device 10 has a plurality of light sources 12 that emit light forward, and a substrate 11 on which the plurality of light sources 12 are arranged. Electric wires are connected to the substrate 11 to supply power for causing the plurality of light sources 12 to emit light and / or control signals for controlling the plurality of light sources 12.

[0022] The multiple light sources 12 are, for example, light-emitting elements that emit blue light. Light-emitting elements that emit green light and / or red light may also be used. The multiple light sources 12 are, for example, minute LEDs. The multiple light sources 12 are, for example, arranged in a two-dimensional matrix. The multiple light sources 12 are, for example, regularly arranged in a matrix of M rows and N columns (two-dimensional array). M and N are natural numbers greater than or equal to 2. M and N may be the same value or different values. That is, the arrangement intervals of the multiple light sources 12 in the row and column directions may be the same or different. Furthermore, although the outline of the area in which the multiple light sources 12 are arranged is rectangular in FIG. 2 , it may also be circular. The multiple light sources 12 may be configured to emit light of the same color tone or light of different color tones.

[0023] The wavelength converter 20 includes a phosphor. The phosphor may be, for example, but is not limited to, a YAG (yttrium aluminum garnet) yellow phosphor. The phosphor is arranged to face the multiple light sources 12. The phosphor is, for example, a phosphor that is excited by blue light to emit green light, yellow light, or red light. The wavelength converter 20 emits white light, which is a mixture of, for example, blue light emitted by the multiple light sources 12 and passed through the yellow phosphor, and yellow light whose wavelength is converted by the wavelength converter 20 while passing through the yellow phosphor.

[0024] In the present embodiment, the light source 12 may include a light-emitting element and a phosphor. In this case, the wavelength converter 20 may not be provided. In this case, in the plurality of light sources 12, the phosphor may be disposed on the light-emitting side (front) of the light-emitting element.

[0025] A control unit 50 that controls the light emission of each of the multiple light sources 12 is electrically connected to the substrate 11. The control unit 50 independently controls each of the multiple light sources 12 by outputting a control signal to the light-emitting device 10. For example, the control unit 50 turns on only one or more light sources 12 required to illuminate a predetermined area on an illumination target, and turns off the remaining light sources 12 that do not illuminate the predetermined area. The control unit 50 can also individually control the on / off, light emission intensity, light emission time, etc. of each of the multiple light sources 12. In other words, the control unit 50 selectively controls each of the multiple light sources 12 to control the illumination light pattern of one or more spot illumination lights irradiated on the illumination target. Specifically, the control unit 50 controls the multiple light sources 12 to change at least one of the light distribution characteristics, color tone, and intensity (brightness) of the spot illumination light.

[0026] For example, the control unit 50 may have a dimming function and a color adjustment function. In this case, the control unit 50 can adjust the dimming and color of the light irradiated onto the illumination target based on the control signal. For example, the lighting device 1 can irradiate the illumination target with dynamic spot illumination light whose color tone changes over time or whose color tone changes periodically. For example, the control unit 50 controls the multiple light sources 12 so that the color tone of the spot illumination light emitted from the lighting device 1 gradually changes over time from light with a low color temperature to light with a high color temperature, or gradually changes the color tone of the spot illumination light emitted from the lighting device 1 from light with a high color temperature to light with a low color temperature.

[0027] Furthermore, the lighting device 1 individually controls the on / off of the multiple light sources 12. This allows the lighting device 1 to emit spot illumination light with brightness and darkness for each region of the illumination object, spot illumination light with adjusted color, and spot illumination light with adjusted shape. For example, by irradiating the illumination object with the spot illumination light, an image corresponding to the brightness and darkness can be made to appear on the wall surface. The image may be a still image or a moving image.

[0028] Furthermore, a hook blade 60 that receives power from an external commercial power source may be electrically connected to the control unit 50. By connecting the hook blade 60 to the ceiling hook, power is supplied to the control unit 50 from the external commercial power source.

[0029] The control unit 50 is realized by, for example, an ASIC (Application Specific Integrated Circuit) and a microcontroller. The microcontroller includes, for example, a non-volatile memory in which a program is stored, a volatile memory that is a temporary storage area for executing the program, and a processor that executes the program. The program may be stored in the storage unit 51. The control unit 50 may be a dedicated processing circuit that performs processing.

[0030] The storage unit 51 stores information necessary for processing performed by the control unit 50, illumination data for controlling the illumination light pattern of the spot illumination light, and software for executing the illumination data. The storage unit 51 is, for example, a non-volatile storage medium such as an HDD (Hard Disk Drive) or a flash memory.

[0031] The communication unit 52 is a wireless communication interface or a wired communication interface capable of communicating with an external device. The communication unit 52 acquires control input data for controlling each of the multiple light sources 12 from the external device. For example, the communication unit 52 receives control input data transmitted from an external device operated by a user and outputs the received control input data to the control unit 50. As a result, the control unit 50 controls each of the multiple light sources 12 in accordance with the control input data acquired by the communication unit 52. Specifically, the control unit 50 acquires, from the storage unit 51, lighting data in accordance with the control input data input from the communication unit 52, using software stored in the storage unit 51. The control unit 50 can control the multiple light sources 12 by outputting control signals based on the lighting data acquired on the software to the multiple light sources 12.

[0032] Each of the optical bodies 30 is a lens for adjusting the output direction of light emitted from each of the multiple light sources 12, the light distribution of the spot illumination light from the light-emitting device 10, the distance at which a desired illumination light pattern can be drawn, etc., particularly a fixed lens without a focal length adjustment function. The optical body 30 used in this embodiment is an aspherical lens, but is not limited to this. Each of the multiple optical bodies 30 emits light forward by controlling the light distribution of the light emitted from each of the multiple light sources 12 via the wavelength converter 20 so that an image based on the spot illumination light is displayed on the illumination object. In other words, the light emitted from each of the multiple light sources 12 becomes spot illumination light that is irradiated onto the illumination object via the wavelength converter 20 and the multiple optical bodies 30. Each of the multiple optical bodies 30 can irradiate the illumination object with spot illumination light obtained by controlling the light distribution of the light emitted from each of the multiple light sources 12 in a one-to-one correspondence. The optical axes of the spot illumination light corresponding to the light emitted from each of the multiple light sources 12 are different. The optical axis of the spot illumination light is parallel to the emission direction of the main spot illumination light emitted from the illumination device 1 .

[0033] The number, shape, outer diameter, etc. of the multiple optical bodies 30 are appropriately determined depending on, for example, the functions required of the lighting device 1. In the present embodiment, the number of multiple optical bodies 30 is illustrated as four, but this is not limiting. For example, the number of multiple optical bodies 30 may be two or three. It is preferable that the number of multiple optical bodies 30 is four or less. In this case, the optical system is simplified compared to a projector or the like that requires five or more lenses to ensure focusing. At the same time, there is no problem in drawing the desired illumination light pattern on the irradiation surface, etc. Therefore, the lighting device 1 of the present embodiment can suppress increases in size and cost.

[0034] The focal length of each of the multiple optical bodies 30 is set to be longer or shorter than the distance between the lighting device 1 and the illumination object. In other words, one optical system (the multiple optical bodies 30) can convert light into spot illumination light that forms an unfocused illumination light pattern at an illumination distance of at least 0.5 m to 10 m. The multiple optical bodies 30 are arranged in the housing 40 so as to overlap along the optical axis of the light source 12, but the focal lengths of the multiple optical bodies 30 are different from one another. Therefore, when the spot illumination light emitted by the lighting device 1 is irradiated onto the illumination object, the spot illumination light can blur the boundaries of the image displayed on the illumination object. Thus, by setting the illumination distance to 0.5 m to 10 m, in particular, it is expected that the spot illumination light can blur the boundaries of the image displayed on the illumination object.

[0035] In this embodiment, the optical bodies 30 are arranged so that the outer diameter of the lens gradually increases with increasing distance from the light emitting device 10 .

[0036] The housing 40 is a container that houses the light-emitting device 10, the plurality of optical bodies 30, and the control unit 50. The housing 40 is cylindrical with a bottom and is open on one side. The plurality of optical bodies 30 are arranged side by side on the opening side of the housing 40 so as to overlap along the optical axis of the light source 12 and cover the opening of the housing 40. The control unit 50 is housed in the bottom of the housing 40, and the light-emitting device 10 is arranged in the housing 40 so as to be located between the control unit 50 and the plurality of optical bodies 30.

[0037] <Illumination Mode> Next, with reference to FIGS. 3 to 5, an illumination mode of the spot illumination light that the illumination device 1 of this embodiment irradiates onto an illumination object will be described.

[0038] Fig. 3 is a diagram showing an internal structure of the lighting device 1 according to the embodiment and an illumination light pattern on an illuminated object different from that shown in Fig. 1. Fig. 4 is a diagram showing an internal structure of the lighting device 1 according to the embodiment and an illumination light pattern on an illuminated object different from that shown in Fig. 3. Fig. 5 is a diagram showing an internal structure of the lighting device 1 according to the embodiment and an illumination light pattern on an illuminated object different from that shown in Fig. 4.

[0039] The lighting device 1 can control the illumination light pattern of the spot illumination light irradiated onto the illumination object. As shown in Fig. 1, the lighting device 1 can irradiate the illumination object with two illumination light patterns, each of which has a circular spot illumination light shape. In other words, the lighting device 1 can display multiple illumination light patterns on the illumination object.

[0040] 3, the lighting device 1 can also project onto an illumination object two illumination light patterns, one in which the shape of the spot lighting is circular and the other in which the shape of the spot lighting is rectangular. In other words, the lighting device 1 can freely select and change the shape of the illumination light pattern, and can display illumination light patterns of different shapes on an illumination object.

[0041] 4, the illumination device 1 can also irradiate an illumination object with two illumination light patterns, one in which the shape of the spot illumination light is circular and the other in which the shape of the spot illumination light is a large circle. In other words, the illumination device 1 can freely change the size of the illumination light pattern.

[0042] 5, the lighting device 1 can also irradiate an illumination object with one illumination light pattern in which the shape of the spot illumination light is circular and another illumination light pattern in which the shape of the spot illumination light is circular but the irradiation position is changed. In other words, the lighting device 1 can freely change the position at which the spot illumination light is irradiated on the illumination object.

[0043] In this way, by appropriately designing the multiple optical bodies 30, multiple spot illumination lights can be generated from the light emitted by each of the multiple light sources 12. Furthermore, in the illumination device 1, the control unit 50 can selectively control one or more light sources 12 from among the multiple light sources 12 to control the illumination light pattern of one or more spot illumination lights irradiated onto the illumination object. That is, the control unit 50 controls the illumination device 1 so that only one or more light sources 12 necessary to illuminate a predetermined area on the illumination object are turned on, and the remaining light sources 12 that do not illuminate the predetermined area are turned off. For example, by turning on all light sources 12 that fall within a circular area of ​​a predetermined size among the multiple light sources 12 arranged in a two-dimensional array, spot illumination light that forms a circular illumination light pattern is irradiated onto the illumination object via the multiple optical bodies 30. By selectively controlling one or more light sources 12 from among the multiple light sources 12, the control unit 50 can simultaneously form illumination light patterns of different shapes, sizes, and positions on the illumination object.

[0044] Furthermore, as described above, the illumination device 1 of this embodiment can change the size of the spot illumination light irradiated onto the illumination object, as shown in FIG. 4 . Therefore, as shown in FIG. 4 and other figures, the area of ​​the spot illumination light when viewed from the front can be made smaller than the area of ​​the optical body 30 when viewed from the front. In this case, even if the area of ​​the illumination object when viewed from the front is smaller than the area of ​​the optical body 30 when viewed from the front, the size of the spot illumination light can be adjusted to fit the size of the small illumination object. Furthermore, even for illumination objects that are far from the illumination device 1, the size of the spot illumination light can be adjusted to fit the size of the illumination object.

[0045] Next, a case where an illumination light pattern of spot illumination light is displayed on an actual illumination object using the illumination device 1 of this embodiment will be described with reference to Fig. 6A. Fig. 6A is a diagram showing an illumination mode of the illumination device 1 on the illumination object.

[0046] 6A shows a case where light is irradiated onto an irradiation object placed at a position 2 m away from the lighting device 1. In FIG. 6A, a white styrene board is used as an example of the irradiation object.

[0047] For example, as shown in (a) of Figure 6A, the lighting device 1 can realize an illumination light pattern in which a large circular spot illumination light and a small circular spot illumination light are simultaneously irradiated onto the object to be illuminated at a position that avoids at least a position directly in front of the optical body 30.

[0048] 6A(b), the illumination device 1 can realize an illumination light pattern in which the circular spot illumination light gradually increases in size as it moves to the right from the illumination light pattern shown in FIG. 6A(a), and the number of spot illumination light increases as it moves from left to right. In this way, the illumination device 1 can simultaneously display illumination light patterns of multiple spot illumination light of different sizes on the illumination object.

[0049] Furthermore, as shown in FIG. 6A(c), the lighting device 1 can realize an illumination light pattern in which a single circular spotlight is displayed or the size of the spotlight changes over time.

[0050] As shown in FIG. 6A(d), the lighting device 1 can realize an illumination light pattern that displays one circular spot illumination light darker than in the case of FIG. 6A(c).

[0051] 6A(e), the lighting device 1 can realize a grid-like or mesh-like illumination light pattern. In this way, the lighting device 1 can display an illumination light pattern of a complex shape on an illuminated object.

[0052] Furthermore, even when the distance between the lighting device 1 and the object to be illuminated is short, as shown in (f) of Fig. 6A, the lighting device 1 can realize a grid-like or mesh-like illumination light pattern on the object to be illuminated. Note that when the distance between the lighting device 1 and the object to be illuminated is less than 0.5 m, the illumination light pattern is likely to disappear, making it difficult for the user to recognize the illumination light pattern. Note that, from the illumination light pattern state shown in (e) of Fig. 6A, the grid-like or mesh-like illumination light pattern can be gradually made smaller or its illumination position can be moved, as shown in (f) of Fig. 6A.

[0053] 6A(g), the lighting device 1 can realize a square spotlight, a polygonal spotlight such as a hexagonal or pentagonal spotlight, or a star-shaped spotlight. Also, as shown in FIG. 6A(h), the lighting device 1 can realize spotlights such as emergency exit guide lights and passageway guide lights. In this way, the lighting device 1 can simultaneously display a plurality of spotlight patterns of different shapes on an illuminated object.

[0054] The spot illumination light shown in (a) to (h) of FIG. 6A is merely an example, and is not limited to this embodiment, and other known shapes can also be realized as spot illumination light.

[0055] As shown in (a) to (h) of Figure 6A, the contours of the boundary portions of the spot illumination light are blurred. This is because, as described above, the focal length of each of the multiple optical bodies 30 is set to be different from the distance between the illumination device 1 and the object to be illuminated. For example, in the multiple spot illumination lights whose light distribution is controlled by the multiple optical bodies 30, the focus may be shifted within a range of 1 m to 3 m along the illumination direction from the optical body 30 arranged at the forefront of the multiple optical bodies 30. In the illumination device 1 of this embodiment, even though the contours of the boundary portions of the illumination light pattern of the spot illumination light are blurred, the shape of the illumination light pattern can be displayed on the object to be illuminated so that the shape of the illumination light pattern can be recognized.

[0056] Next, a case where an illumination light pattern of spot illumination light is displayed on an actual illumination target using the illumination device 1 of this embodiment will be described with reference to Fig. 6B. Fig. 6B is a diagram showing how a space is illuminated.

[0057] 6B(a), for example, the lighting device 1 can simultaneously emit multiple spot illumination lights in different directions to simultaneously form illumination light patterns at multiple locations on an object to be illuminated. Furthermore, the lighting device 1 can individually control the dimming, light distribution, position, color tone, etc., of the multiple illumination light patterns.

[0058] 6B(b), for example, when the lighting device 1 irradiates an object with spotlight, it can perform lighting effects using lighting patterns such as still images and moving images. Furthermore, the control unit 50 can use the lighting data stored in the storage unit 51 to reproduce lighting patterns or set a schedule to reproduce predetermined lighting patterns.

[0059] As shown in (c) of FIG. 6B , for example, when the lighting device 1 irradiates an irradiation object with spot illumination light, the shape of the illumination light pattern irradiated onto the irradiation object can be appropriately changed. Furthermore, upon acquiring information indicating the shape of the irradiation object, the control unit 50 can select one or more corresponding light sources 12 from among the plurality of light sources 12 based on the information and turn on the selected light sources 12. This allows the lighting device 1 to irradiate the irradiation object with spot illumination light according to the shape of the irradiation object, thereby displaying a flexible illumination light pattern according to the shape of the irradiation object. As shown in (c) of FIG. 6B , flexible lighting can be performed that matches the contours of a floor, which is an example of an irradiation object.

[0060] Next, a description will be given of setting the illumination mode of the lighting device 1 with reference to Fig. 6C. Fig. 6C is a diagram showing how a user sets the illumination mode of the lighting device 1 with respect to an illumination target using an external device.

[0061] The user can set the illumination mode by operating the external device while viewing the illumination light pattern that the illumination device 1 irradiates onto the illumination object. By setting the illumination mode, the illumination device 1 can produce, for example, a spot-like illumination light pattern, a preset pattern, or an illumination light pattern that uses spot illumination light to draw a picture on the illumination object in the same way as a picture that the user draws on the screen of the external device.

[0062] Next, an illumination light pattern of spot illumination light irradiated onto an illumination object will be described with reference to Fig. 7. Fig. 7 is a diagram showing a first illumination region and a second illumination region, and the illuminance of the first illumination region and the illuminance of the second illumination region. Specifically, Fig. 7(a) shows the first illumination region and the second illumination region included in the illumination light pattern when spot illumination light having the illumination pattern shown in Fig. 6A is irradiated onto an illumination object. Fig. 7(b) shows the illuminance of the first illumination region and the illuminance of the second illumination region in the case of Fig. 7(a).

[0063] As shown in (a) of FIG. 7, the illumination light pattern of the spot illumination light irradiated onto the illumination object includes a first illumination region, which is the center of the illumination light pattern, and a second illumination region surrounding the first illumination region. As shown in (b) of FIG. 7, the illuminance of the illumination light pattern tends to decrease at a predetermined gradient at a boundary portion B. The first illumination region is an area having a higher illuminance than the second illumination region. The boundary portion B is an edge portion on the periphery of the first illumination region, which indicates a position where the illuminance is 50% of the sum of the maximum illuminance of the first illumination region and the minimum illuminance (background) of the second illumination region. Note that the boundary portion B is not limited to a position where the illuminance is 50% of the sum, but may be 40%, 30%, 20%, 10%, etc. In this case, the illumination light pattern drawn by the spot illumination light can be highlighted.

[0064] The plurality of spot illumination lights whose light distribution is controlled by the plurality of optical bodies 30 may have a first illumination region and a second illumination region formed in a range of 0.7 m to 4 m along the illumination direction from the optical body 30 that is arranged foremost among the plurality of optical bodies 30. In this case, the illumination device 1 according to the embodiment can display the illumination light pattern of the spot illumination light on the illumination object so that the shape of the illumination light pattern can be recognized even though the outline of the boundary portion of the illumination light pattern is blurred.

[0065] In the case of a plurality of spot illumination lights whose light distribution is controlled by a plurality of optical bodies 30, the effective distance at which the illumination light pattern can be recognized along the irradiation direction from the optical body 30 arranged at the forefront of the plurality of optical bodies 30 is set to be 0.5 m or more. Furthermore, in the case of a plurality of spot illumination lights whose light distribution is controlled by a plurality of optical bodies 30, the effective distance at which the illumination light pattern can be recognized along the irradiation direction from the optical body 30 arranged at the forefront of the plurality of optical bodies 30 is set to be 10 m or less. If the effective distance is less than 0.5 m, the illuminated object may be hidden by the lighting device 1 and may become invisible from the surroundings. Furthermore, if the effective distance is less than 0.5 m or exceeds 10 m, the illumination light pattern may disappear, and the user may not be able to recognize the boundary between the first illumination area and the second illumination area that indicate the illumination light pattern.

[0066] Although the lighting device 1 according to the present embodiment has been described above, the configuration of the lighting device 1 is not limited to the configuration described in the above embodiment. Therefore, modifications of the configuration of the lighting device 1 will be described, focusing on the differences from the above embodiment.

[0067] <Luminance Distribution> Next, with reference to FIGS. 8 to 10, a luminance distribution when the illumination device 1 of this embodiment irradiates an illumination object with spot illumination light will be described.

[0068] Fig. 8 is a diagram showing a case where spot illumination light is irradiated onto an irradiation object. Fig. 8 shows the luminance distribution when the small circular spot illumination light on the left in (a) of Fig. 6A is irradiated onto an irradiation object. Fig. 9 is a diagram showing a case where another spot illumination light is irradiated onto an irradiation object. Fig. 9 shows the luminance distribution when the circular spot illumination light in (c) of Fig. 6A is irradiated onto an irradiation object. Fig. 10 is a diagram showing a case where yet another spot illumination light is irradiated onto an irradiation object. Fig. 10 shows the luminance distribution when the circular spot illumination light in (d) of Fig. 6A is irradiated onto an irradiation object.

[0069] For example, the illuminance of the spot illumination light irradiated on the irradiation object may be as shown in Fig. 8 to Fig. 10. Specifically, when the illuminance of the spot illumination light irradiated on the irradiation object has an inverted V-shaped waveform as shown in Fig. 8, or when the illuminance of the spot illumination light irradiated on the irradiation object has an inverted U-shaped waveform as shown in Fig. 9, the illuminance of the spot illumination light irradiated on the irradiation object may change gradually as shown in Fig. 10. In either case, the illumination light pattern of the spot illumination light irradiated on the irradiation object includes a first illumination region and a second illumination region, and the user can recognize the first illumination region and the second illumination region.

[0070] 8 to 10, the average illuminance of the first irradiation region is set to 1.1 to 100 times the average illuminance of the second irradiation region. Preferably, the average illuminance of the first irradiation region may be set to 2, 3, 5, or 10 to 100 times the average illuminance of the second irradiation region. Furthermore, the average gradient of the illuminance distribution in boundary portion B is larger than the average gradient of the illuminance distribution in the center of the first irradiation region and the outer periphery of the second irradiation region.

[0071] <Modification 1> In this modification, the same components as those in the above embodiment are denoted by the same reference numerals and the description thereof will be omitted as appropriate.

[0072] First, a lighting device 1a of this modified example will be described with reference to FIG.

[0073] FIG. 11 is a diagram showing the internal structure of the lighting device 1a according to the first modification and the illumination light pattern of the spot illumination light irradiated onto an illumination object.

[0074] The lighting device 1 a of this modification includes a light emitting device 10 , a control unit 50 , a memory unit 51 , a communication unit 52 , a plurality of optical bodies 30 , a wavelength converter 20 , and a housing 40 , as well as a detection unit 71 .

[0075] The detection unit 71 is a sensor that detects at least one of the shape, size, and color tone of an object to be illuminated with spot illumination light. The detection unit 71 is, for example, an object detection sensor, a color sensor, an image sensor, or the like.

[0076] The control unit 50 controls each of the plurality of light sources 12 based on the detection result detected by the detection unit 71. For example, the control unit 50 controls each of the plurality of light sources 12 so that the light source has a shape corresponding to the shape of the object to be irradiated based on the detection result detected by the detection unit 71. In this way, the control unit 50 controls each of the plurality of light sources 12 so that the light source has a shape similar to the shape of the object to be irradiated, so that the lighting device 1a can irradiate the object with spot illumination light so that the light source has a shape similar to the shape of the object to be irradiated.

[0077] Furthermore, for example, the control unit 50 controls each of the plurality of light sources 12 so that the size of each light source 12 is approximately the same as the size of the object to be irradiated that covers the object to be irradiated, based on the detection result detected by the detection unit 71. In this way, the control unit 50 controls each of the plurality of light sources 12 so that the size of each light source 12 is approximately the same as the size of the object to be irradiated that covers the object to be irradiated, and thus the lighting device 1a can irradiate the object to be irradiated with spot illumination light so that the size of each light source 12 is approximately the same as the size of the object to be irradiated that covers the object to be irradiated.

[0078] Furthermore, for example, the control unit 50 controls each of the plurality of light sources 12 so that the color tone corresponds to the color tone of the object to be illuminated, based on the detection result detected by the detection unit 71. Specifically, the control unit 50 controls the plurality of light sources 12 so that white light is emitted if the color tone of the object to be illuminated is black. In this way, the control unit 50 controls each of the plurality of light sources 12 so as to highlight the color tone of the object to be illuminated, and thereby the lighting device 1a can illuminate the object to be illuminated with spot illumination light so that the color tone can highlight the object to be illuminated.

[0079] In this modification, the lighting device 1 a includes the detection unit 71, but the present modification is not limited to this. For example, the modification may be applied to a lighting system including the detection unit 71 and the lighting device 1 a having the light-emitting device 10, the control unit 50, the storage unit 51, the communication unit 52, the plurality of optical bodies 30, the wavelength converter 20, and the housing 40.

[0080] <Modification 2> In this modification, the same components as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted as appropriate. Since this modification has the same configuration as Modification 1, the description will be made with reference to FIG. 11 .

[0081] First, a lighting device 1a of this modified example will be described with reference to FIG.

[0082] The lighting device 1 a of this modification includes a light emitting device 10 , a control unit 50 , a memory unit 51 , a communication unit 52 , a plurality of optical bodies 30 , a wavelength converter 20 , and a housing 40 , as well as a detection unit 71 .

[0083] The detection unit 71 is a sensor that detects at least one of the movement of an object to be irradiated with spot illumination light and the temperature of the object to be irradiated. The detection unit 71 is, for example, a motion sensor, a thermosensor, an image sensor, or the like.

[0084] The control unit 50 controls each of the plurality of light sources 12 based on the detection result detected by the detection unit 71. For example, the control unit 50 controls each of the plurality of light sources 12 based on the detection result detected by the detection unit 71 so as to follow the movement of the irradiation target.

[0085] For example, the control unit 50 may control each of the plurality of light sources 12 to have a shape similar to the shape of the irradiation object, which changes in accordance with the movement of the irradiation object, or may control each of the plurality of light sources 12 to continue irradiating the irradiation object in accordance with the movement of the irradiation object. When the control unit 50 identifies the trajectory of the moving irradiation object, which is the movement of the irradiation object, the lighting device 1a may continue irradiating the irradiation object with light so as to follow the identified trajectory. In this way, by the control unit 50 controlling each of the plurality of light sources 12 so as to follow the irradiation object, the lighting device 1a can irradiate the irradiation object or the surroundings of the moving irradiation object or the forward direction of the movement of the irradiation object in accordance with the movement of the irradiation object.

[0086] For example, the control unit 50 controls each of the plurality of light sources 12 so as to change the color tone of the light irradiated onto the irradiation object in accordance with the temperature of the irradiation object. Specifically, the control unit 50 controls the plurality of light sources 12 so that reddish spot illumination light is irradiated onto the irradiation object if the irradiation object is at a predetermined temperature or higher, and controls the plurality of light sources 12 so that bluish spot illumination light is irradiated onto the irradiation object if the irradiation object is below the predetermined temperature. In this way, the control unit 50 controls each of the plurality of light sources 12 in accordance with the temperature of the irradiation object, so that the lighting device 1a can irradiate the irradiation object with spot illumination light of a color in accordance with the temperature of the irradiation object.

[0087] In addition, this modified example may also be applied to an illumination system including an illumination device 1a having a light-emitting device 10, a control unit 50, a memory unit 51, a communication unit 52, a plurality of optical bodies 30, a wavelength converter 20 and a housing 40, and a detection unit 71.

[0088] <Modification 3> In this modification, the same components as those in the above embodiment are denoted by the same reference numerals and the description thereof will be omitted as appropriate.

[0089] First, a lighting device 1b of this modified example will be described with reference to FIG.

[0090] FIG. 12 is a diagram showing the internal structure of a lighting device 1b according to Modification 3 and an illumination light pattern on an object to be illuminated, which is different from that shown in FIG.

[0091] The illumination device 1b of this modified example further includes an acquisition unit 72 in addition to the light-emitting device 10, the control unit 50, the storage unit 51, the communication unit 52, the plurality of optical bodies 30, the wavelength converter 20, and the housing 40.

[0092] The acquisition unit 72 acquires at least one of the following: season, calendar, time, weather, climate, temperature, and humidity. The acquisition unit 72 may be, for example, a data acquisition unit that acquires the season, calendar, time, weather, climate, temperature, and humidity from an external device, or may be a sensor such as a timing sensor, a temperature sensor, a meteorological sensor, or a humidity sensor.

[0093] The control unit 50 controls each of the plurality of light sources 12 based on the content acquired by the acquisition unit 72 .

[0094] For example, the control unit 50 controls each of the multiple light sources 12 according to the season. Specifically, when the season is spring, the control unit 50 controls the multiple light sources 12 so that a spring scene is displayed on the irradiation object. When the season is summer, the control unit 50 controls the multiple light sources 12 so that a summer scene is displayed on the irradiation object. When the season is autumn, the control unit 50 controls the multiple light sources 12 so that an autumn scene is displayed on the irradiation object. When the season is winter, the control unit 50 controls the multiple light sources 12 so that a winter scene is displayed on the irradiation object. In this way, by the control unit 50 controlling each of the multiple light sources 12 according to the season, the lighting device 1b can irradiate the irradiation object with spot illumination light that displays seasonal characters, pictures, figures, patterns, etc.

[0095] For example, the control unit 50 controls each of the plurality of light sources 12 according to a calendar. Specifically, the control unit 50 controls the plurality of light sources 12 so that a calendar showing the current month and day is displayed on the illumination object. As a result, the control unit 50 controls each of the plurality of light sources 12 according to the calendar, and the illumination device 1b can irradiate the illumination object with spot illumination light of characters, pictures, figures, patterns, etc. according to the calendar.

[0096] For example, the control unit 50 controls each of the multiple light sources 12 according to the time. Specifically, when it is morning, the control unit 50 controls the multiple light sources 12 so that a morning scene is displayed on the object to be irradiated. When it is daytime, the control unit 50 controls the multiple light sources 12 so that a daytime scene is displayed on the object to be irradiated. When it is evening, the control unit 50 controls the multiple light sources 12 so that an evening scene is displayed on the object to be irradiated. When it is night, the control unit 50 controls the multiple light sources 12 so that a night scene is displayed on the object to be irradiated. In this way, by the control unit 50 controlling each of the multiple light sources 12 according to the time, the lighting device 1b can irradiate the object to be irradiated with spotlight light that displays characters, pictures, figures, patterns, etc. according to the time. As shown in FIG. 12 , the time itself can also be displayed as a clock.

[0097] For example, the control unit 50 controls each of the multiple light sources 12 according to the weather. Specifically, when the weather is sunny, the control unit 50 controls the multiple light sources 12 so that a sunny appearance is displayed on the illumination target. Furthermore, when the weather is cloudy, the control unit 50 controls the multiple light sources 12 so that a cloudy appearance is displayed on the illumination target. Furthermore, when the weather is rainy, the control unit 50 controls the multiple light sources 12 so that a rainy appearance is displayed on the illumination target. Furthermore, when the weather is snowy, the control unit 50 controls the multiple light sources 12 so that a snowy appearance is displayed on the illumination target. In this way, by the control unit 50 controlling each of the multiple light sources 12 according to the weather, the lighting device 1b can irradiate the illumination target with spot illumination light that displays letters, pictures, figures, patterns, etc. according to the weather.

[0098] For example, the control unit 50 controls each of the plurality of light sources 12 in accordance with the climate, such as weather, temperature, precipitation, and wind. Specifically, the control unit 50 controls the plurality of light sources 12 so that the current climate state is displayed on the illumination target. As a result, the control unit 50 controls each of the plurality of light sources 12 in accordance with the climate, and the lighting device 1b can irradiate the illumination target with spot illumination light that displays characters, pictures, figures, patterns, and the like in accordance with the climate.

[0099] For example, the control unit 50 controls each of the plurality of light sources 12 in accordance with the temperature. Specifically, the control unit 50 controls the plurality of light sources 12 so that the current temperature is displayed on the object to be illuminated. As a result, the control unit 50 controls each of the plurality of light sources 12 in accordance with the temperature, and the lighting device 1b can illuminate the object to be illuminated with spot illumination light that displays characters, pictures, figures, patterns, etc. in accordance with the temperature.

[0100] For example, the control unit 50 controls each of the plurality of light sources 12 according to the humidity. Specifically, the control unit 50 controls the plurality of light sources 12 so that the current humidity state is displayed on the object to be illuminated. As a result, the control unit 50 controls each of the plurality of light sources 12 according to the humidity, and the lighting device 1b can illuminate the object to be illuminated with spot illumination light that displays characters, pictures, figures, patterns, etc. according to the humidity.

[0101] In this modification, the illumination device 1b includes the acquisition unit 72, but the present modification is not limited to this. For example, the modification may be applied to an illumination system including the illumination device 1b, which includes the light-emitting device 10, the control unit 50, the storage unit 51, the communication unit 52, the plurality of optical bodies 30, the wavelength converter 20, and the housing 40, and the acquisition unit 72.

[0102] <Modification 4> In this modification, the same components as those in the above embodiment are denoted by the same reference numerals and the description thereof will be omitted as appropriate.

[0103] First, illumination devices 1c, 1c1, 1d, 1e, and 1f of the present modified example will be described with reference to FIGS.

[0104] Fig. 13 is a perspective view showing a lighting device 1c according to Modification 4. Fig. 14 is a perspective view showing a lighting device 1c1 installed on a stand 110. Fig. 15 is a cross-sectional view showing the internal structure of a lighting device 1d according to Modification 4. Fig. 16 is a block diagram showing a lighting device 1d according to Modification 4. Fig. 17 is a block diagram showing a lighting device 1e when connected to an external power source by wire. Fig. 18 is a block diagram showing a lighting device 1f when connected to an external power source wirelessly.

[0105] As shown in FIG. 13 , the lighting device 1c may have a grip 41 to make it easier for the user to carry. The housing 40 is cylindrical, and the grip 41 is integrally connected to the outer periphery of the housing 40, which houses the multiple light sources 12, the control unit, and the multiple optical bodies 30. Being integrally connected means that the housing 40 and the grip 41 cannot be separated without being destroyed. In this embodiment, the grip 41 has a U-shaped, D-shaped, or C-shaped grip, for example, so that the user can easily grasp it. Note that the shape of the grip 41 is not limited to a U-shaped, D-shaped, or C-shaped grip, and may be any other known shape, as long as the user can grasp the grip 41.

[0106] 14 , the lighting device 1c1 may have a stand 110 for placing the lighting device 1c1 in a predetermined position. The stand 110 is connected to the housing 40. That is, the housing 40 may have a connecting portion for attaching the lighting device 1c1 to the stand 110. The connecting portion is connected to the stand 110, thereby fixing the lighting device 1c1 to the stand 110. The stand 110 may also allow rotation, including panning and tilting, so as to change the position of the housing 40.

[0107] Specifically, the stand 110 has legs 111, a support column 112, and a pivotal connection portion 113. The legs 111 support the support column 112. The legs 111 may be, for example, a tripod, a tetrapod, or a plate-like base. The support column 112 is supported by the legs 111 and extends vertically. The pivotal connection portion 113 is connected to the support column 112 so as to be pivotable in the circumferential direction around the longitudinal direction of the support column 112 as a central axis. In other words, the pivotal connection portion 113 is pivotable in the pan direction (left-right direction) relative to the support column 112. Because a pivotal shaft portion 114 extending horizontally and provided on the pivotal connection portion 113 is pivotally connected to a connection portion of the housing 40, the pivotal connection portion 113 allows the housing 40 to be pivoted in the tilt direction (up-down direction). Therefore, the lighting device 1c1 connected to the stand 110 can rotate in the pan direction and the tilt direction. The rotation in the pan direction and the tilt direction provided on the stand 110 may be performed automatically or manually. When the rotation in the pan direction and the tilt direction is performed automatically, an actuator such as a motor that rotates the stand 110 in the pan direction and the tilt direction is mounted on the stand 110.

[0108] Such a stand 110 is required to have a certain level of strength in order to support the lighting device 1c1, and therefore the stand 110 may be made of a metal material or the like.

[0109] Furthermore, lighting device 1c1 is detachable from stand 110. When lighting device 1c1 is attached to pivotal connection portion 113 of stand 110, pivotal connection portion 113 rotates relative to support portion 112, thereby allowing lighting device 1c1 to rotate in the pan direction, and pivotal connection portion 113 rotates relative to support portion 112, thereby allowing lighting device 1c1 to rotate in the tilt direction.

[0110] 15 and 16 , the lighting device 1d may further include a battery 54 and a power supply unit 53 for supplying power to the plurality of light sources 12. In this case, the battery 54 and the power supply unit 53 may also be housed in the housing 40.

[0111] The power supply unit 53 can convert power from an external power supply into DC power of a predetermined level and supply the converted DC power to each light source 12. When the external power supply is a commercial power supply, the power supply unit 53 can convert AC power from the external power supply into DC power of a predetermined level by rectifying, smoothing, stepping down, etc., and supply the converted DC power to each light source 12.

[0112] Furthermore, the power supply unit 53 can supply power from the battery 54 to the plurality of light sources 12. When the external power supply is a commercial power supply, the power supply unit 53 can convert AC power from the external power supply into DC power of a predetermined level by rectifying, smoothing, stepping down, etc., and supply the power to the battery 54, thereby charging the battery 54. Furthermore, the power supply unit 53 can convert DC power from the battery 54 into DC power of a predetermined level and supply the converted DC power to each light source 12.

[0113] The battery 54 may be a primary battery or a secondary battery. If the battery 54 is a secondary battery, the stand 110 may have a function to charge the battery 54 of the lighting device 1d.

[0114] Furthermore, even if the battery 54 of the lighting device 1d runs out of power, the lighting device 1d can be turned on by replacing the battery 54. For this reason, the lighting device 1d does not need to be connected to a power supply cable, i.e., it does not need to be connected to an external power source by a power supply cable.

[0115] For example, as shown in Fig. 17, the lighting device 1e may be powered by a wired connection. Specifically, the lighting device 1e may be powered by being connected to an external power source such as a commercial power source via a power supply cable.

[0116] In this case, the lighting device 1e may further include a power supply connector 55 in addition to the battery 54, the power supply unit 53, etc. The power supply connector 55 is a connector for supplying power to the power supply unit 53, and is provided on the housing 40. The power supply connector 55 may be connected to a power supply cable, and outputs power supplied from an external power source via the power supply cable to the power supply unit 53. In other words, the lighting device 1e is supplied with power from the external power source via the power supply cable.

[0117] The power supply cable is, for example, a USB cable, a power supply cable with an adapter, etc. The power supply connector 55 is, for example, a USB terminal, a DC plug, etc.

[0118] The external power source may also be another lighting device having a battery 54. The other lighting device may have a configuration similar to that of the lighting device 1e. In this case, the power supply connector 55 of the lighting device 1e may be connected to a connector of the other lighting device via a power supply cable, or may be directly connected to a connector of the other lighting device. In this case, the lighting device 1e may be able to be charged by the other lighting device, or may charge the other lighting device.

[0119] For example, as shown in FIG. 18 , the lighting device 1f may be powered wirelessly (contactless power supply). Specifically, in addition to the battery 54 and the power supply unit 53, the lighting device 1f may further include a power receiving unit 56 capable of receiving power contactlessly from a power transmitting unit 57. The power transmitting unit 57 is composed of a power transmitting coil and the like connected to an external power source. The power receiving unit 56 is provided in the housing 40 of the lighting device 1f and is composed of a power receiving coil and the like connected to the power supply unit 53. When the lighting device 1f is powered, the lighting device 1f is placed near the power transmitting unit 57, and power is supplied to the power receiving unit 56 from the power transmitting unit 57. The power receiving unit 56 outputs power supplied from the external power source via the power transmitting unit 57 to the power supply unit 53. In other words, the lighting device 1f is supplied with power from the external power source via the power receiving unit 56 and the power transmitting unit 57.

[0120] The lighting device 1f may also have a power supply connector 55. In this case, the power supply connector 55 of the lighting device 1f may be connected to a connector of another lighting device via a power supply cable, or may be directly connected to a connector of another lighting device. In this case, the lighting device 1f may be able to be charged by the other lighting device, or may charge the other lighting device. The other lighting device may have a configuration similar to that of the lighting device 1f.

[0121] In the lighting devices 1e and 1f, an operation switch that enables the user to select whether to charge the lighting device 1e or 1f or another lighting device and to charge the selected lighting device may be provided on the housing 40. By operating the operation switch, the user can switch between charging the lighting device 1e or 1f from another lighting device and charging the other lighting device from the lighting device 1e or 1f.

[0122] For example, lighting device 1e or 1f may act as a master device, and connect its power supply connector 55 to the connector of another lighting device to charge the other lighting device as a slave device. When multiple other lighting devices are connected to lighting device 1e or 1f, a lighting device that should be given priority for charging may be charged from among the multiple other lighting devices. The lighting device that should be given priority for charging is a lighting device that is using a spot illumination light pattern and has a low charge capacity of its battery 54. The user can charge the lighting device that should be given priority by inputting a setting in advance via an external device.

[0123] For example, if there are two lighting devices 1e and 1f that serve as slave devices, and the two lighting devices 1e and 1f share their charge capacity with each other, as in a peer-to-peer format, power may be supplied from the lighting device 1e or 1f that is executing an illumination light pattern with a lower importance to the lighting device 1e or 1f that is executing an illumination light pattern with a higher importance.

[0124] In either the case of wired connection or wireless connection, the lighting devices 1e and 1f may not be equipped with a battery 54. In this case, the power supply unit 53 may convert AC power from an external power supply into DC power of a predetermined level by rectifying, smoothing, stepping down, etc., and supply the converted DC power to each light source 12.

[0125] Although the present modification illustrates a case in which the battery 54 is mounted in the housing 40 of the lighting device 1d, 1e, or 1f, the present invention is not limited to this. For example, the battery 54 may be provided external to the lighting device 1d, 1e, or 1f. In this case, the user may carry the lighting device 1d, 1e, or 1f together with the battery 54 while holding the lighting device 1d, 1e, or 1f, such as by carrying the lighting device 1d, 1e, or 1f on the user's shoulder or attached to the user's arm or torso.

[0126] Furthermore, the configuration of the grip portion 41 and the stand 110 in the lighting devices 1c and 1c1 may be included in the lighting devices 1d, 1e, and 1f.

[0127] <Operational Effects> Next, operational effects of the lighting devices 1, 1a, and 1b according to the present embodiment will be described.

[0128] As described above, the illumination devices 1, 1a, and 1b according to technique 1 of the present embodiment are illumination devices capable of irradiating an illumination object with one or more spot illumination lights, and include a plurality of light sources 12, a control unit 50 that controls illumination light patterns of the one or more spot illumination lights irradiated onto the illumination object by selectively controlling each of the plurality of light sources 12, and a plurality of optical bodies 30 that irradiate the illumination object with spot illumination lights obtained by controlling the light distribution of light emitted from each of the plurality of light sources 12 in a one-to-one correspondence. The focal length of each of the plurality of optical bodies 30 is longer or shorter than the distance between the illumination device 1, 1a, or 1b and the illumination object.

[0129] This allows a single lighting device 1, 1a, or 1b to simultaneously irradiate multiple illumination targets or to irradiate light that changes over time. This eliminates the need to install multiple lighting fixtures in a space to illuminate multiple illumination targets, as was previously required, and therefore reduces the need to install multiple lighting devices in a space.

[0130] Therefore, according to the lighting devices 1, 1a, and 1b of this embodiment, it is possible to suppress the increase in the installation area of ​​the lighting device and the increase in costs required for lighting equipment in the space due to the increase in installation area, and it is expected that the number of lighting fixtures to be installed can be reduced, so that an illuminated space with excellent design can be realized without having to line up a large number of lighting fixtures.

[0131] In particular, according to the lighting devices 1, 1a, and 1b of the present embodiment, when the focal length of each of the optical bodies 30 is longer than the distance between the lighting devices 1, 1a, and 1b and the object to be illuminated, spot illumination light can be created that blurs the contour of the spot illumination light like illumination light from a general lighting fixture, but still allows the user to recognize the illumination light pattern of the spot illumination light that can display content, etc., even though the light is closer to illumination light from a general lighting fixture than light illuminated by a projector onto an object to be illuminated, with a clearly separated contour of light.

[0132] Furthermore, when the focal length of each of the multiple optical bodies 30 is shorter than the distance between the lighting devices 1, 1a, 1b and the object to be illuminated, by using a fisheye lens or the like, as in a single-focus projector, it is possible to create spot lighting light that blurs the contours in the lighting light pattern of the spot lighting light, like the lighting light of a general lighting fixture, while still allowing the lighting light pattern to be recognized.

[0133] In this way, the illumination devices 1, 1a, and 1b of the present embodiment can use the illumination light pattern of spot illumination light to display an illumination light pattern that is recognizable like light emitted by a projector, while also displaying a blurred outline like general illumination light. As a result, there is no need to use an expensive device such as a projector, and an increase in the number of illumination devices 1, 1a, and 1b installed can be suppressed, thereby suppressing an increase in the cost required for lighting equipment in a space.

[0134] Furthermore, the control unit 50 controls the plurality of light sources 12 arranged in a two-dimensional array, thereby enabling independent control of each of the plurality of spot illumination lights. This allows one or more spot illumination lights to be irradiated to a desired location, while preventing spot illumination light from being irradiated to an unnecessary location. As a result, the illumination devices 1, 1a, and 1b of the present embodiment can suppress an increase in power consumption and are easy to use.

[0135] Furthermore, according to the lighting devices 1, 1a, and 1b of the present embodiment, even when a plurality of spot illumination lights are to be irradiated onto a plurality of small objects such as dolls and ornaments, spot illumination lights adjusted to fit the size of each small object can be irradiated from a distance.

[0136] Furthermore, conventional lighting fixtures using gobo filters can only emit a single illumination light pattern, making it difficult to change the illumination light pattern emitted to the illumination target, and the gobo filter blocks the light emitted by the light source 12, resulting in wasted power. Therefore, it has been considered to use a projector to emit illumination light to the illumination target, but projectors require an air-cooling fan, which increases power consumption, makes embedding the projector difficult, increases costs for maintenance and inspection due to dust accumulation, increases the size of the equipment, and generates noise.

[0137] However, it is possible to change the illumination light pattern irradiated onto the illumination object and to suppress an increase in the cost required for lighting equipment in the space.

[0138] Furthermore, the illumination devices 1, 1a, and 1b according to Technique 2 of the present embodiment are the illumination devices 1, 1a, and 1b described in Technique 1. In this case, the focal lengths of the optical bodies 30 are different from one another.

[0139] With this, when a plurality of spot illumination lights emitted from the lighting devices 1, 1a, and 1b are irradiated onto an object to be illuminated, an illumination light pattern of the spot illumination lights with blurred contours can be displayed on the object to be illuminated.

[0140] Furthermore, the illumination devices 1, 1a, and 1b according to Technology 3 of this embodiment are the illumination devices 1, 1a, and 1b described in Technology 1 or 2. In this case, the illumination light pattern of the spot illumination light irradiated onto the illumination object includes a first illumination region that is a central portion of the illumination light pattern and a second illumination region that surrounds the periphery of the first illumination region. The average gradient of the illuminance distribution at a boundary portion B between the first illumination region and the second illumination region is larger than the average gradient of the illuminance distribution at the central portion of the first illumination region and the outer periphery of the second illumination region.

[0141] This allows the first illumination area to display the illumination light pattern of the spot illumination light in a recognizable manner, like a projector, and the second illumination area to blur the contours of the illumination light pattern of the spot illumination light, like general illumination light.

[0142] Furthermore, the lighting devices 1, 1a, and 1b according to Technique 4 of the present embodiment are the lighting devices 1, 1a, and 1b described in Technique 3. In this case, the average illuminance of the first irradiation region is 1.1 to 100 times the average illuminance of the second irradiation region.

[0143] For example, if the average illuminance of the first illumination area is less than 1.1 times the average illuminance of the second illumination area, it may become impossible to recognize the contour of the illumination light pattern of the spot illumination light.

[0144] However, according to this embodiment, the lighting devices 1, 1a, and 1b can use the illumination light pattern of spot illumination light to display an illumination light pattern that is recognizable like light emitted by a projector, while also displaying a blurred outline like general illumination light.

[0145] Furthermore, the illumination devices 1, 1a, and 1b according to Technology 5 of the present embodiment are the illumination devices 1, 1a, and 1b described in any one of Technologies 1 to 4. In this case, the plurality of spot illumination lights subjected to light distribution control by the plurality of optical bodies 30 are out of focus within a range of 1 m to 3 m along the irradiation direction from the optical body 30 that is arranged foremost among the plurality of optical bodies 30.

[0146] This allows the spot illumination light to illuminate the target object so as to blur its contour within a range of 1 m to 3 m along the illumination direction from the optical body 30. In other words, the illumination light pattern of the spot illumination light irradiated onto the target object can be recognized within a range of 1 m to 3 m. Within this distance range, an illumination light pattern that is recognizable by the user can be presented to the target object. In particular, the lighting device 1 of this embodiment is expected to be usable within a distance range that is primarily used for general lighting, store lighting, and street lighting.

[0147] Furthermore, the lighting devices 1, 1a, and 1b according to Technology 6 of the present embodiment are the lighting devices 1, 1a, and 1b described in Technology 3. In this case, in the plurality of spot illumination lights subjected to light distribution control by the plurality of optical bodies 30, a first illumination region and a second illumination region are formed within a range of 0.7 m to 4 m along the illumination direction from the optical body 30 arranged at the forefront of the plurality of optical bodies 30.

[0148] According to this, by forming the first illumination region and the second illumination region within a range of 0.7 m to 4 m along the illumination direction from the optical body 30, it is possible to illuminate the illumination object so as to blur the contours of the spot illumination light. In other words, it is not necessary to irradiate multiple illumination objects with focused illumination light. This eliminates the need for a focus adjustment function, and it is possible to prevent the illumination devices 1, 1a, and 1b from becoming larger and their structures from becoming more complex. In particular, it is expected that the illumination devices 1, 1a, and 1b will be used within distances typically used for general lighting, store lighting, and street lighting.

[0149] Furthermore, the lighting devices 1, 1a, and 1b according to Technology 7 of the present embodiment are the lighting devices 1, 1a, and 1b described in any one of Technologies 1 to 6. In this case, in a plurality of spot illumination lights whose light distribution is controlled by a plurality of optical bodies 30, the effective distance at which an illumination light pattern can be recognized along the irradiation direction from the optical body 30 arranged at the forefront of the plurality of optical bodies 30 is 0.5 m or more.

[0150] For example, when an illumination target is placed at a position less than 0.5 m from the illumination device 1, 1a, or 1b, the illumination target may be hidden by the illumination device 1, 1a, or 1b. Furthermore, when the distance is less than 0.5 m, the illumination light pattern may disappear, making it difficult for the user to recognize the illumination light pattern. Therefore, it is expected that the illumination target illuminated with spot illumination light will be recognized by the user so that the illumination target is not partially or completely hidden. Furthermore, it is expected that the illumination light pattern of the spot illumination light illuminated on the illumination target will not be lost so that the illumination light pattern will not disappear.

[0151] Furthermore, the lighting devices 1, 1a, and 1b according to Technology 8 of the present embodiment are the lighting devices 1, 1a, and 1b described in any one of Technologies 1 to 7. In this case, in a plurality of spot illumination lights whose light distribution is controlled by a plurality of optical bodies 30, the effective distance at which an illumination light pattern can be recognized along the irradiation direction from the optical body 30 arranged at the forefront of the plurality of optical bodies 30 is 10 m or less.

[0152] For example, when spot illumination light is irradiated onto an illumination target located more than 10 m away from the illumination device, the contour of the illumination light pattern of the spot illumination light may become blurred.

[0153] However, with the lighting devices 1, 1a, and 1b of the present embodiment, it is expected that the illumination light pattern of the spot illumination light can be recognized.

[0154] Furthermore, in this embodiment, since the spot illumination light is not irradiated onto an illumination target located at a distance of more than 10 m, it is not necessary to use an optical design for realizing a narrower light distribution angle or a control mechanism for accurately irradiating the spot illumination light toward a predetermined position. Therefore, by suppressing the complexity of the optical design and control mechanism in the illumination devices 1, 1a, and 1b, it is possible to suppress an increase in the manufacturing costs of the illumination devices 1, 1a, and 1b.

[0155] Furthermore, the lighting devices 1, 1a, and 1b according to Technique 9 of the present embodiment are the lighting devices 1, 1a, and 1b described in any one of Techniques 1 to 8. In this case, the control unit 50 controls the plurality of light sources 12 to change at least one of the light distribution characteristics, color tone, and intensity of the spot illumination light.

[0156] According to this, it is possible to irradiate an object with a plurality of spot illumination lights having different characteristics. Therefore, it is possible to irradiate a plurality of objects with different characteristics with corresponding spot illumination lights. Since the object can be presented with the spot illumination lights, it is expected that the appearance of the object can be improved.

[0157] Furthermore, the lighting devices 1, 1a, and 1b according to Technology 10 of this embodiment are the lighting devices 1, 1a, and 1b described in any one of Technology 1 to 9. In this case, the lighting devices 1, 1a, and 1b further include a communication unit 52 capable of communicating with an external device. The communication unit 52 also acquires control input data for controlling each of the plurality of light sources 12 from the external device. The control unit 50 then controls each of the plurality of light sources 12 in accordance with the control input data acquired by the communication unit 52.

[0158] This allows the lighting devices 1, 1a, and 1b to be controlled from a location away from the lighting devices 1, 1a, and 1b, and allows the user to adjust the spot illumination light while checking the illumination light pattern of the illumination object illuminated by the spot illumination light. In other words, the lighting devices 1, 1a, and 1b can irradiate the illumination object with spot illumination light whose shape, position, size, color tone, intensity, etc. are dynamically changed in conjunction with the user's operation of an external device. This improves usability for the user.

[0159] Furthermore, the lighting devices 1, 1a, and 1b according to Technique 11 of the present embodiment are the lighting devices 1, 1a, and 1b described in any one of Techniques 1 to 10. In this case, the lighting devices 1, 1a, and 1b further include a storage unit 51 that stores software for controlling the illumination light patterns of the plurality of light sources 12. The control unit 50 controls each of the plurality of light sources 12 using the software stored in the storage unit 51.

[0160] According to this, by installing software in an external device such as a smartphone or tablet terminal, it is possible to operate the lighting devices 1, 1a, and 1b using the external device.

[0161] Furthermore, since it will be easier to upgrade software, it is expected to become more widely used and will be easier for users to use.

[0162] Furthermore, the illumination device 1a according to Technology 12 of this embodiment is the illumination device 1a according to any one of Technology 1 to Technology 11. In this case, the illumination device 1a further includes a detection unit 71 that detects at least one of the shape, size, and color tone of an illumination object illuminated with spot illumination light. The control unit 50 controls each of the plurality of light sources 12 based on the detection result detected by the detection unit 71.

[0163] This allows the illumination light to be emitted in accordance with at least one of the shape, size, and color tone of the object to be illuminated, so that the object to be illuminated can be illuminated with the spot illumination light in an illumination mode that suits the object to be illuminated.The spot illumination light can create an effect on the object to be illuminated, which is expected to improve the appearance of the object to be illuminated.

[0164] Furthermore, the illumination device 1a according to Technique 13 of the present embodiment is the illumination device 1a according to any one of Techniques 1 to 11. In this case, the illumination device 1a further includes a detection unit 71 that detects at least one of the movement of an illumination object irradiated with spot illumination light and the temperature of the illumination object. The control unit 50 controls each of the plurality of light sources 12 based on the detection result detected by the detection unit 71.

[0165] This allows the irradiation of spot illumination light according to at least one of the movement of the irradiation object and the temperature of the irradiation object, so that the irradiation object can be irradiated with spot illumination light in an illumination mode according to the irradiation object. Since the irradiation object can be presented with the spot illumination light, it is expected that the appearance of the irradiation object can be improved.

[0166] Furthermore, a lighting device 1b according to Technique 14 of the present embodiment is the lighting device 1b according to any one of Techniques 1 to 11. In this case, the lighting device 1b further includes an acquisition unit 72 that acquires at least one of the following information: season, calendar, time, weather, climate, temperature, and humidity. The control unit 50 controls each of the plurality of light sources 12 based on the information acquired by the acquisition unit 72.

[0167] This allows at least one of the season, calendar, time, weather, climate, temperature, and humidity to be displayed on the illumination object using the illumination light pattern of the spot illumination light, allowing the user to recognize the illumination light pattern displayed on the illumination object.

[0168] Furthermore, an illumination device 1c according to Technique 15 of the present embodiment is the illumination device 1c according to any one of Techniques 1 to 14. In this case, the illumination device 1c includes a housing 40 that houses a plurality of light sources 12, a control unit 50, and a plurality of optical bodies 30, and a grip unit 41 connected to the housing 40.

[0169] According to this, when the lighting device 1c is turned on, the housing 40 may become hot. Even in this case, the user can hold the grip portion 41 without feeling much heat, and therefore the user can carry the lighting device 1c while holding the grip portion 41.

[0170] Furthermore, the illumination device 1c1 according to Technology 16 of the present embodiment is the illumination device 1c1 described in any one of Technologies 1 to 15. In this case, the illumination device 1c1 includes a housing 40 that houses a plurality of light sources 12, a control unit 50, and a plurality of optical bodies 30, and a stand 110 for installing the housing 40.

[0171] According to this, by installing the lighting device 1c1 on the stand 110, the lighting device 1c1 can be maintained in a desired position. This reduces the shaking of the lighting device 1c1's position and the fluctuation of the illumination light pattern of the spot illumination light irradiated on the illumination target. Note that the lighting device 1c1 may be equipped with a camera stabilizer function and a vibration sensor in case the stand 110 is weakly constructed. In this case, if the vibration detection result of the vibration sensor exceeds an allowable range, the control unit 50 may activate the camera stabilizer function. This reduces the shaking of the illumination device 1c1's illumination due to the vibration, even if the lighting device 1c1 vibrates due to, for example, a person walking near the lighting device 1c1.

[0172] Furthermore, a lighting device 1d according to Technology 17 of the present embodiment is the lighting device 1d described in any one of Technologies 1 to 16. In this case, the lighting device 1d includes a battery 54 and a power supply unit 53 for supplying power from the battery 54 to the plurality of light sources 12, and the battery 54 and the power supply unit 53 are housed in a housing 40.

[0173] According to this, even if the battery 54 of the lighting device 1d runs out of power, the lighting device 1d can be turned on simply by replacing the battery 54. Therefore, the lighting device 1d can be carried in a turned-on state without connecting the lighting device 1d to an external power source such as a commercial power source, thereby improving the convenience of the lighting device 1d.

[0174] Furthermore, a lighting device 1e according to Technique 18 of the present embodiment is the lighting device 1e described in any one of Techniques 1 to 17. In this case, the lighting device 1e includes a power supply unit 53 for supplying power to the plurality of light sources 12, and a power feed connector 55 for feeding power to the power supply unit 53, and the power feed connector 55 is supplied with power from an external power source.

[0175] According to this, when the external power source is a commercial power source, the lighting device 1e is powered from the external power source via the power feed connector 55, and therefore can be turned on by power fed from the commercial power source. On the other hand, when the external power source is another lighting device, the lighting device 1e is powered from the other lighting device via the power feed connector 55, and therefore can be turned on by power fed from the commercial power source. The lighting device 1e is highly versatile because it can select the external power source to feed power from.

[0176] Furthermore, a lighting device 1f according to Technique 19 of the present embodiment is the lighting device 1f described in any one of Techniques 1 to 18. In this case, the lighting device 1f includes a power receiving unit 56 capable of receiving power from a power transmitting unit 57 in a contactless manner, and a power supply unit 53 for supplying the power received by the power receiving unit 56 to the plurality of light sources 12.

[0177] According to this, power is supplied to the lighting device 1f simply by placing the lighting device 1f near the power receiving unit 56, so that power can be easily supplied to the lighting device 1f.

[0178] (Other Modifications) While the lighting device according to the present disclosure has been described above based on the above-described embodiments, the present disclosure is not limited to these embodiments. As long as the modifications do not deviate from the spirit of the present disclosure, various modifications conceivable by those skilled in the art may also be included in the scope of the present disclosure.

[0179] For example, although the lighting device in this embodiment is exemplified as including a light source and a wavelength converter, this is not limiting. For example, the lighting device may not be provided with a separate wavelength converter, as in this embodiment. In this case, the light emitting device is composed of a plurality of light sources, a light emission control circuit, and the like. Each of the plurality of light sources may include a red LED chip, a blue LED chip, and a green LED chip. Note that the light source may be realized by other light emitting elements, such as a semiconductor laser, an organic electroluminescence (EL) element, or an inorganic EL element.

[0180] Furthermore, the lighting device in this embodiment is installed indoors in a store, facility, etc., but may also be applied to manned transport vehicles such as ships, vehicles, and aircraft, or may be applied to outdoor lighting.

[0181] Furthermore, the control unit included in the lighting device of this embodiment is typically realized as an LSI, which is an integrated circuit. These may be individually implemented as single chips, or some or all of them may be integrated into a single chip.

[0182] Furthermore, the integrated circuit is not limited to an LSI, but may be realized by a dedicated circuit or a general-purpose processor. An FPGA (Field Programmable Gate Array) that can be programmed after the LSI is manufactured, or a reconfigurable processor that can reconfigure the connections and settings of circuit cells within the LSI may also be used.

[0183] In the above-described embodiments, each component may be configured with dedicated hardware, or may be realized by executing a software program suitable for that component. Each component may be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a storage medium such as a hard disk or semiconductor memory.

[0184] Furthermore, all of the numbers used above are examples for specifically explaining the present disclosure, and the embodiments of the present disclosure are not limited to the numbers shown as examples.

[0185] The division of functional blocks in the block diagram is an example, and multiple functional blocks may be realized as a single functional block, one functional block may be divided into multiple blocks, or some functions may be moved to another functional block.Furthermore, the functions of multiple functional blocks having similar functions may be processed in parallel or in time-sharing by a single piece of hardware or software.

[0186] The present disclosure also includes forms obtained by applying various modifications to the above-described embodiments that would occur to those skilled in the art, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope of the present disclosure. In other words, the present disclosure also includes forms realized by arbitrarily combining the components and functions of the present embodiment, modifications 1 to 4, and other modifications.

[0187] Furthermore, the lighting device in this embodiment includes the lighting devices in Modifications 1 to 4 and other modifications, and forms realized by arbitrarily combining the components and functions of the lighting devices in Modifications 1 to 4 and other modifications are also included in the present disclosure.

[0188] REFERENCE SIGNS 1, 1a, 1b, 1c, 1c1, 1d, 1e, 1f Illumination device 12 Light source 30 Optical body 41 Grip unit 50 Control unit 51 Storage unit 52 Communication unit 53 Power supply unit 54 Battery 55 Power supply connector 56 Power receiving unit 57 Power transmitting unit 71 Detection unit 72 Acquisition unit 110 Stand

Claims

1. A lighting device capable of irradiating an illumination object with one or more spot illumination lights, comprising: a plurality of light sources; a control unit which controls an illumination light pattern of the one or more spot illumination lights irradiated to the illumination object by selectively controlling each of the plurality of light sources; and a plurality of optical bodies which irradiate the illumination object with the spot illumination lights, which are obtained by controlling the light distribution of the light emitted from each of the plurality of light sources, in a one-to-one correspondence, wherein the focal length of each of the plurality of optical bodies is longer or shorter than the distance between the lighting device and the illumination object.

2. The lighting device according to claim 1, wherein the focal lengths of the optical bodies are different from each other.

3. The lighting device according to claim 1 or 2, wherein the illumination light pattern of the spot illumination light irradiated onto the illumination object includes a first illumination area which is a central part of the illumination light pattern, and a second illumination area which surrounds the periphery of the first illumination area, and an average gradient of the illuminance distribution at a boundary portion between the first illumination area and the second illumination area is larger than an average gradient of the illuminance distribution at the central part of the first illumination area and an outer periphery of the second illumination area.

4. The lighting device according to claim 3, wherein the average illuminance of the first illumination area is 1.1 to 100 times the average illuminance of the second illumination area.

5. The lighting device according to claim 1 or 2, wherein the plurality of spot illumination lights, the light distribution of which is controlled by the plurality of optical bodies, are out of focus within a range of 1 m or more and 3 m or less along the irradiation direction from the optical body that is located at the forefront of the plurality of optical bodies.

6. The lighting device according to claim 3, wherein the first illumination area and the second illumination area are formed in a range of 0.7 m to 4 m along the illumination direction from the optical body that is arranged at the forefront of the plurality of optical bodies in the plurality of spot illumination lights that have been light distribution controlled by the plurality of optical bodies.

7. The lighting device according to claim 1 or 2, wherein in the plurality of spot illumination lights whose light distribution is controlled by the plurality of optical bodies, an effective distance at which the illumination light pattern can be recognized along the irradiation direction from the optical body that is arranged at the forefront of the plurality of optical bodies is 0.5 m or more.

8. The lighting device according to claim 1 or 2, wherein in the plurality of spot illumination lights whose light distribution is controlled by the plurality of optical bodies, an effective distance at which the illumination light pattern can be recognized along the irradiation direction from the optical body that is arranged at the forefront of the plurality of optical bodies is 10 m or less.

9. The lighting device according to claim 1 or 2, wherein the control unit controls the plurality of light sources so as to change at least one of the light distribution characteristics, color tone, and intensity of the spot illumination light.

10. The lighting device according to claim 1 or 2, further comprising a communication unit capable of communicating with an external device, the communication unit acquiring control input data for controlling each of the plurality of light sources from the external device, and the control unit controlling each of the plurality of light sources in accordance with the control input data acquired by the communication unit.

11. A lighting device as described in claim 1 or 2, further comprising a memory unit storing software for controlling the illumination light pattern of each of the plurality of light sources, wherein the control unit controls each of the plurality of light sources using the software stored in the memory unit.

12. The lighting device according to claim 1 or 2, further comprising a detection unit that detects at least one of the shape, size, and color tone of the object to be illuminated on which the spot illumination light is irradiated, and the control unit controls each of the plurality of light sources based on the detection results detected by the detection unit.

13. The lighting device according to claim 1 or 2, further comprising a detection unit that detects at least one of the movement of the object to be irradiated with the spot illumination light and the temperature of the object to be irradiated, and the control unit controls each of the plurality of light sources based on the detection results detected by the detection unit.

14. A lighting device as described in claim 1 or 2, further comprising an acquisition unit that acquires at least one of the following information: season, calendar, time, weather, climate, temperature, and humidity, and the control unit controls each of the multiple light sources based on the information acquired by the acquisition unit.

15. The lighting device according to claim 1 or 2, comprising: a housing that houses a plurality of the light sources, the control unit, and a plurality of the optical bodies; and a gripping unit connected to the housing.

16. The lighting device according to claim 1 or 2, comprising: a housing that houses a plurality of the light sources, the control unit, and a plurality of the optical bodies; and a stand for installing the housing.

17. The lighting device according to claim 15, further comprising: a battery; and a power supply unit for supplying the power of the battery to the plurality of light sources, the battery and the power supply unit being housed in the housing.

18. The lighting device according to claim 1 or 2, further comprising: a power supply unit for supplying power to the plurality of light sources; and a power supply connector for supplying power to the power supply unit, the power supply connector receiving power from an external power supply.

19. The lighting device according to claim 1 or 2, comprising: a power receiving unit capable of receiving power from a power transmitting unit in a non-contact manner; and a power supply section for supplying the power received by the power receiving unit to the plurality of light sources.

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