JP7573207B2 - Illumination device and illumination system - Google Patents

Description

This disclosure relates to lighting devices and lighting systems.

In recent years, lighting devices have been introduced that can create a special atmosphere in a room by changing the brightness and color of the light.

As conventional lighting devices, there are disclosed a number of lighting fixtures that illuminate a room, and a lighting control system that is connected to the multiple lighting fixtures and controls at least one of the light color and dimming level of the multiple lighting fixtures depending on the quality of a person's voice (see Patent Document 1).

JP 2015-60828 A

This type of lighting device only changes the brightness and color of the light around a person by changing the light emission mode according to the quality of the person's voice. For example, if light shines through a skylight in a room with a skylight, it looks as if the light that shines in has created a space of light in part of the room. Conventional lighting devices are unable to create a space of light by shining light as if it were cutting out a part of the space in the room.

Therefore, this disclosure has been made in consideration of the above circumstances, and provides a lighting device and lighting system that can create a space created by light.

In order to achieve the above-mentioned object, one aspect of the lighting device according to the present disclosure is a lighting device that irradiates light in a first direction and a second direction opposite to the first direction, the lighting device comprising: a first light source that irradiates light in the first direction; and a second light source that irradiates light in the second direction, the first light source and the second light source being arranged such that an optical axis of the first light source and an optical axis of the second light source are substantially parallel to the first direction and the second direction, a first contour of the light in the first direction irradiated onto an irradiation surface and a second contour of the light in the second direction irradiated onto an irradiation surface are synchronized , and the lighting device further comprises a control unit that controls the first contour and the second contour in response to bioinformation indicating a physical condition of a user detected by a sensor .

In order to achieve the above object, one aspect of the lighting system according to the present disclosure includes a lighting device, a sensor that outputs the bioinformation acquired by detecting the user's physical condition, and an information processing device that determines the light emission modes of the light emitted by the first light source and the second light source, as well as the first contour and the second contour, based on the bioinformation.

The lighting device and the like according to the present disclosure can create a space created by light.

FIG. 1 is a schematic diagram illustrating an illumination device according to an embodiment. FIG. 2 is a schematic diagram illustrating a light emission mode different from that shown in FIG. 1 in the lighting device according to the embodiment. FIG. 3 is a block diagram illustrating a lighting system according to an embodiment. FIG. 4A is a conceptual diagram illustrating a lighting system according to an embodiment. FIG. 4B is an image diagram illustrating a case where the size of the first contour and the size of the second contour are the same in the lighting system according to the embodiment. FIG. 5 is a cross-sectional view of the lighting device taken along line VV in FIG. FIG. 6 is a schematic diagram illustrating the opening diameters of the first contour forming portion and the second contour forming portion used in the lighting device of the lighting system according to the embodiment. FIG. 7 is a schematic diagram illustrating a boundary between an illuminated area and a non-illuminated area of light illuminated on an illumination surface by an illumination device of an illumination system according to an embodiment. FIG. 8 is a flow diagram illustrating the operation of the information processing device of the lighting system according to the embodiment. FIG. 9 is a flow diagram illustrating an operation of determining the diameter of the first contour in the information processing device of the lighting system according to the embodiment.

The following describes embodiments of the present disclosure with reference to the drawings. Each embodiment described below shows a specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, the arrangement and connection of the components, steps, and the order of steps shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following embodiments, components that are not described in an independent claim that shows the highest concept of the present disclosure are described as optional components.

Each figure is a schematic diagram and is not necessarily illustrated precisely. Therefore, for example, the scales and the like do not necessarily match in each figure. Furthermore, in each figure, the same reference numerals are used for substantially the same configurations, and duplicate explanations are omitted or simplified.

In the following embodiments, expressions such as "approximately parallel" are used. For example, "approximately parallel" does not only mean completely parallel, but also means substantially parallel, that is, including an error of, for example, about a few percent. Furthermore, "approximately parallel" means parallel within the range in which the effects of the present disclosure can be achieved. The same applies to other expressions using "approximately."

The following describes the lighting device and lighting system according to the embodiment.

(Embodiment)
[Configuration: Lighting System 1]
Fig. 1 is a schematic diagram illustrating a lighting device 3 according to an embodiment. Fig. 2 is a schematic diagram illustrating a light emission mode of the lighting device 3 according to the embodiment, which is different from that shown in Fig. 1.

As shown in Figures 1 and 2, the lighting system 1 is a system that detects the presence of users and can provide lighting with different light emission modes depending on the number of users present in the room, the user's facial expression, biometric information indicating the user's physical condition, the indoor environment, etc. This lighting system 1 uses a lighting device 3 that illuminates a part of the room. Note that the lighting device 3 may be capable of illuminating the entire room. The user's physical condition is, for example, the user's pulse rate, the user's body temperature, etc. The indoor environment is the temperature, humidity, the surrounding sound pressure level, etc.

Figure 3 is a block diagram illustrating a lighting system 1 according to an embodiment.

As shown in FIG. 3, the lighting system 1 includes a lighting device 3, an information processing device 5, and a terminal device 7.

[Lighting device 3]
As shown in FIG. 1 to FIG. 3, the lighting device 3 is installed on, for example, a ceiling in a room of a building. The lighting device 3 can irradiate (illuminate) light in a first direction and a second direction opposite to the first direction. The lighting device 3 synchronizes the light emission mode of the light irradiated in the first direction with the light emission mode of the light irradiated in the second direction. For example, the lighting device 3 irradiates light on a floor surface and at the same time irradiates light on a ceiling surface. In addition, when a user present in the room is recognized, the lighting device 3 irradiates light to the user. Specifically, the lighting device 3 irradiates light from the lighting device 3 to a floor surface in a first direction where the user is present, and irradiates light to a ceiling surface in a second direction opposite to the first direction. In this embodiment, the first direction is a vertically downward direction, and the second direction is a vertically upward direction. Note that the first direction and the second direction may change depending on the installation state of the lighting device 3, and the first direction is not limited to a vertically downward direction and the second direction is not limited to a vertically upward direction.

In addition, the lighting device 3 changes the emission mode of the light it irradiates depending on the number of users present in the room, the user's facial expression, biometric information indicating the user's physical condition, the user's voice, the environment around the lighting device 3, etc.

FIG. 4A is an image diagram illustrating a lighting system 1 according to an embodiment. As shown in FIG. 4A, for example, when there is one or more users in a room, the lighting device 3 irradiates light in a spot manner so as to cover the presence area of the users in a group. In other words, the lighting device 3 irradiates light so as to envelop the group. In other words, the lighting device 3 changes the area of light irradiated onto the floor and ceiling surfaces depending on the size of the presence area of the users. In addition, when the size and shape of the presence area change due to an increase or decrease in the number of users, the lighting device 3 simultaneously changes the size and shape of the irradiation area of each light so that the change in the irradiation area of the light irradiated onto the floor surface and the change in the irradiation area of the light irradiated onto the ceiling surface are synchronized.

The user presence area is an area in which one or more users are concentrated in a certain range, for example, an area formed by surrounding one or more users with a circle. The user presence area is also an area in which a first distance from the lighting device 3 to the user is equal to or less than a threshold value, as will be described later.

Here, shining light so as to envelop the group means that the lighting device 3 looks at the user and shines light onto almost the entire body of the user. Therefore, it does not mean that the lighting device 3 looks at the user and intentionally shines light onto part of the user's body.

The lighting device 3 also irradiates light onto the ceiling surface in a second direction, which is the opposite direction to the first direction from the lighting device 3 toward the group of users. This allows the lighting device 3 to illuminate from the ceiling surface to the floor surface. For example, if the room is dark, a columnar space is created that is bright from the ceiling surface to the floor surface.

In addition, when the lighting device 3 irradiates the floor and ceiling surfaces with light, the lighting device 3 also changes the boundary between the light-irradiated area and the non-irradiated area where light is not irradiated, in response to at least one of the user's facial expression and the biometric information indicating the user's physical condition. For example, the lighting device 3 irradiates light so that the boundary between the light-irradiated area and the non-irradiated area is clearly emphasized, or irradiates light so that the brightness gradually decreases from the center of the light-irradiated area toward the non-irradiated area, that is, so that the boundary of the light is blurred. In addition, when the user's facial expression and the biometric information indicating the user's physical condition change, the lighting device 3 simultaneously changes the light of each so that the change in the boundary between the light-irradiated area and the non-irradiated area of the light irradiated onto the floor surface and the change in the boundary between the light-irradiated area and the non-irradiated area of the light irradiated onto the ceiling surface are synchronized.

The lighting device 3 may also change the brightness and color (color temperature, wavelength, etc.) of the light it irradiates in response to the user's facial expression and biometric information indicating the user's physical condition. In this case, too, when the user's facial expression or the biometric information indicating the user's physical condition changes, the lighting device 3 simultaneously changes the brightness and color of the light irradiated onto the floor surface and the brightness and color of the light irradiated onto the ceiling surface so that they are synchronized.

Figure 5 is a cross-sectional view of the lighting device 3 taken along line V-V in Figure 1.

As shown in Figures 3 and 5, the lighting device 3 includes a housing 31, a first light-emitting module 10, a second light-emitting module 20, a first contour forming section 30, a second contour forming section 40, a first lens 50, a second lens 60, a control section 70, one or more acoustic devices 80, and a first communication section 90.

<Housing 31>
The housing 31 is a container that houses the first light-emitting module 10, the second light-emitting module 20, the first contour forming section 30, the second contour forming section 40, the first lens 50, the second lens 60, the control section 70, the acoustic device 80, and the first communication section 90. The housing 31 is bottomless and cylindrical, and is long in the up and down (vertical direction). In the present embodiment, the housing 31 is cylindrical, but is not limited thereto, and may be, for example, a polygonal tube, and the shape is not limited thereto.

In this embodiment, the housing 31 is connected to a wire 99 and installed on the ceiling via the wire 99. In other words, the housing 31 is installed so as to be suspended from the ceiling. A communication cable (not shown) that connects the first communication unit 90 and the information processing device 5 so that they can communicate with each other is inserted through the wire 99.

The housing 31 is preferably made of a metal material such as aluminum in order to efficiently dissipate heat generated by the first light-emitting module 10, the second light-emitting module 20, etc. However, as long as heat dissipation properties can be ensured, a resin material, for example, may also be used.

The housing 31 also has a shade section 39 on the vertically upward side that reflects the light emitted by the second light-emitting module 20 toward the ceiling surface. The shade section 39 has a mirror surface that controls the light distribution by reflecting the light irradiated from the second light-emitting module 20. The inner surface of the shade section 39 may be a mirror surface made of a metal such as aluminum, or may be formed using a hard white resin material such as polybutylene terephthalate. The shade section 39 is a bottomless cylinder that opens on the ceiling surface side. The shape of the shade section 39 is a truncated cone that is configured so that the inner diameter gradually increases from the end on the floor surface side toward the end on the ceiling surface side.

<First light emitting module 10>
The first light-emitting module 10 is a module that emits light in a predetermined light-emitting manner in accordance with instructions from the control unit 70. The first light-emitting module 10 is disposed on the floor side of the housing 31 and is held by the housing 31 so as to irradiate light toward the floor surface.

The first light-emitting module 10 has a first light source 11 and a substrate.

The first light source 11 emits light in a first direction (the floor surface in this embodiment). Specifically, the optical axis of the first light source 11 is a straight line that is approximately parallel to the vertical downward direction. In this embodiment, the first direction is the direction in which light is emitted that is parallel to the vertical direction. The optical axis is the straight line of the main light emitted by the first light source 11. The floor surface is an example of an illumination surface for the light emitted by the first light source 11.

The first light source 11 is configured to emit, for example, white light. Specifically, the first light source 11 is configured with a COB (Chip On Board) type LED element, and includes a substrate, a plurality of blue LEDs that are bare chips (LED chips) mounted on the substrate, and a sealing material that seals the blue LEDs and contains a yellow phosphor. The first light source 11 may also emit light of two or more colors. Specifically, the first light source 11 is an RGB three-color light source, and may emit three monochromatic lights of red light, blue light, and green light, and may also emit colored light or white light obtained by dimming these three monochromatic lights. In this embodiment, the color temperature of the light emitted by the first light source 11 is in the range of 2000K to 7000K.

The first light source 11 may be a surface mount device (SMD) type LED element in which the LED is packaged, and has a container (package), multiple LED chips mounted in the container, and a sealing member that seals the multiple LED chips. The sealing member is a translucent insulating resin material such as silicone resin. The sealing member may also contain a light diffusing material such as silica and a filler dispersed therein.

The first light source 11 configured in this manner is mounted on a substrate. In this embodiment, the first light source 11 is mounted on one substrate.

The board is a mounting board having a mounting surface for mounting the first light source 11. The board is fixed to the housing 31 by being attached to the housing 31 with fixing members such as screws (not shown). Specifically, the board is fixed to the housing 31 so that the mounting surface is approximately perpendicular to the vertical direction and faces the floor surface.

As the substrate, for example, a metal-based substrate obtained by applying an insulating coating to a base material made of a metal material such as aluminum or copper, a ceramic substrate which is a sintered body of a ceramic material such as alumina, or a resin substrate based on a resin material is used. In this embodiment, a printed wiring board made of a glass epoxy board on which metal wiring is formed is used as the substrate. The substrate may be either a rigid substrate or a flexible substrate.

<Second Light Emitting Module 20>
The second light-emitting module 20 is a module that emits light in a predetermined light-emitting manner in accordance with instructions from the control unit 70. The second light-emitting module 20 is disposed on the ceiling surface side of the housing 31 and is held by the housing 31 so as to emit light toward the ceiling surface.

The second light-emitting module 20 has a second light source 21 and a substrate.

The second light source 21 emits light in the second direction (the ceiling surface in this embodiment). Specifically, the optical axis of the second light source 21 is a straight line that is approximately parallel to the vertical downward direction. In this embodiment, the second direction is the direction in which light is emitted that is parallel to the vertical direction. The optical axis is the straight line of the main light emitted by the second light source 21. The ceiling surface is an example of an illumination surface for the light emitted by the second light source 21.

The second light source 21 is configured to emit, for example, white light. Specifically, the second light source 21 is configured with a COB type LED element, and has a substrate, a plurality of blue LEDs that are bare chips (LED chips) mounted on the substrate, and a sealing material that seals the blue LEDs and contains a yellow phosphor. The second light source 21 may also emit light of two or more colors. Specifically, the second light source 21 is an RGB three-color light source, and may emit three monochromatic lights of red light, blue light, and green light, and may also emit colored light or white light obtained by dimming these three monochromatic lights. In this embodiment, the color temperature of the light emitted by the second light source 21 is in the range of 2000K to 7000K.

The second light source 21 may be a surface-mounted LED element in which the LED is packaged, and includes a container (package), multiple LED chips mounted in the container, and a sealing member that seals the multiple LED chips. The sealing member is a translucent insulating resin material such as silicone resin. The sealing member may also contain a light diffusing material such as silica and a filler dispersed therein.

The second light source 21 configured in this manner is mounted on a substrate. In this embodiment, the second light source 21 is mounted on one substrate.

The board is a mounting board having a mounting surface for mounting the second light source 21. The board is fixed to the housing 31 by being attached to the housing 31 with fixing members such as screws (not shown). Specifically, the board is fixed to the housing 31 so that the mounting surface is approximately perpendicular to the vertical direction and faces the ceiling surface.

As the substrate, for example, a metal-based substrate obtained by applying an insulating coating to a base material made of a metal material such as aluminum or copper, a ceramic substrate which is a sintered body of a ceramic material such as alumina, or a resin substrate based on a resin material is used. In this embodiment, a printed wiring board made of a glass epoxy board on which metal wiring is formed is used as the substrate. The substrate may be either a rigid substrate or a flexible substrate.

<First contour forming portion 30>
The first contour forming unit 30 is an aperture mechanism that forms a first contour of the light irradiated by the first light source 11 that is irradiated on the floor surface. The first contour forming unit 30 is disposed on the optical axis closer to the floor surface than the first light source 11, and is held by the housing 31 so as to block a part of the light irradiated by the first light source 11. The first contour forming unit 30 forms a first contour of the irradiation area of the light irradiated on the floor surface. The first contour is a ring shape (ellipse, circle, polygon, etc.), a ring shape formed by a wavy curve, etc. In this embodiment, the size of the second contour is smaller than the size of the first contour, but the size of the first contour may be smaller than the size of the second contour or may be the same as the size of the second contour according to the arrangement of the lighting device and the environment to be provided.

For example, the first contour forming section 30 has a configuration equivalent to an aperture mechanism used in cameras and the like. The first contour forming section 30 has a bottomless cylindrical holding member having an opening through which light from the first light source 11 passes, and aperture blades that are provided in the opening of the holding member and that are stacked together to vary the aperture diameter of the opening. The multiple aperture blades are driven and controlled by the control section 70, causing the two overlapping aperture blades to slide and vary the aperture diameter of the opening.

Figure 6 is a schematic diagram illustrating the opening diameters of the first contour forming section 30 and the second contour forming section 40 used in the lighting device 3 of the lighting system 1 according to the embodiment.

Each of the aperture blades 34a shown in FIG. 6a has a tip formed in an arc shape. Also, each of the aperture blades 34b shown in FIG. 6b has a tip formed in a wavy shape that forms the opening 33. In this embodiment, two types of aperture blades 34a and 34b are shown as examples, but are not limited to these. The tip of each aperture blade may be straight or sawtooth, and the shape is not particularly limited. In this embodiment, the first contour forming section 30 has two types of aperture blades 34a and 34b with the shapes shown in FIG. 6a and FIG. 6b. In this way, the first contour forming section 30 can switch the contour of the opening 33 using two types of aperture blades 34a and 34b.

3 and 6, the first contour forming unit 30 is driven and controlled by the control unit 70 to simultaneously rotate the multiple aperture blades 34a or multiple aperture blades 34b that set the shape of the opening 33. For example, the first contour forming unit 30 forms the shape of the opening 33 of the multiple aperture blades 34a or multiple aperture blades 34b in a wavy shape, and then rotates the multiple aperture blades 34a or multiple aperture blades 34b simultaneously around a line that passes through the center of the opening surface of the opening 33 and is perpendicular to the opening surface. This forms the first contour in a wavy manner. The first contour forming unit 30 also rotates the multiple aperture blades 34a or multiple aperture blades 34b simultaneously while changing the diameter of the opening 33 or the shape of the opening 33.

<Second contour forming portion 40>
As shown in FIG. 3 and FIG. 5, the second contour forming unit 40 is an aperture mechanism that forms a second contour of the light irradiated by the second light source 21 that is irradiated to the ceiling surface. The second contour forming unit 40 is disposed on the optical axis closer to the ceiling surface than the second light source 21, and is held by the housing 31 so as to block a part of the light irradiated by the second light source 21. The second contour forming unit 40 forms a second contour of the irradiation area of the light irradiated to the ceiling surface. The second contour is an annular shape (elliptical, circular, polygonal, etc.), an annular shape formed by a wavy curve, etc. In the present embodiment, the size of the second contour is smaller than the size of the first contour, but as shown in FIG. 4B, the size of the first contour may be smaller than the size of the second contour or may be the same according to the arrangement of the lighting device 3 and the environment to be provided. FIG. 4B is an image diagram illustrating a case in which the size of the first contour and the size of the second contour are the same in the lighting system 1 according to the embodiment.

For example, the second contour forming section 40 has a configuration equivalent to an aperture mechanism used in cameras and the like. The second contour forming section 40 has a bottomless cylindrical holding member having an opening through which light from the second light source 21 passes, and aperture blades that are provided in the opening of the holding member and that are stacked together to vary the aperture diameter of the opening. The multiple aperture blades are driven and controlled by the control section 70, causing the two overlapping aperture blades to slide and vary the aperture diameter of the opening.

The second contour forming section 40 has the same configuration as that shown in FIG. 6a and FIG. 6b. The tip side of each aperture blade of the second contour forming section 40 is formed in an arc shape. The tip side of each aperture blade that forms the opening is formed in a wavy shape. Note that, in this embodiment, two types of aperture blades are exemplified, but are not limited to these. The tip of each aperture blade may be straight or sawtooth, and the shape is not particularly limited. In this embodiment, the second contour forming section 40 has the above-mentioned two types of aperture blades. In this way, the second contour forming section 40 can switch the contour of the opening using two types of aperture blades.

The second contour forming unit 40 is driven and controlled by the control unit 70 to simultaneously rotate multiple aperture blades that set the shape of the opening. For example, the second contour forming unit 40 forms the opening shape of the multiple aperture blades into a wavy shape, and then simultaneously rotates the multiple aperture blades around an axis that passes through the center of the opening surface of the opening and is perpendicular to the opening surface. This forms the second contour in a wavy manner. The second contour forming unit 40 also rotates the multiple aperture blades simultaneously while changing the diameter or shape of the opening.

<First Lens 50>
The first lens 50 is disposed on the optical axis closer to the floor surface than the first light source 11 and the first contour forming portion 30, and is held by the housing 31 so as to transmit light that has passed through the first contour forming portion 30. The first lens 50 is a light distribution control lens that controls the distribution of light irradiated from the first light source 11. The surface of the first lens 50 facing the first light source 11 has a shape that allows the light emitted from the first light source 11 to be taken into the first lens 50 with as little leakage as possible.

The position of the first lens 50 changes relative to the first light source 11 and the first contour forming unit 30. In other words, the control unit 70 controls a drive unit (not shown), and the first lens 50 moves vertically by the drive unit.

Figure 7 is a schematic diagram illustrating the boundary between the illuminated area and the non-illuminated area of the light irradiated onto the illumination surface by the illumination device 3 of the illumination system 1 according to the embodiment. As shown in Figures 5 and 7, the distance from the opening 33 of the first contour forming portion 30 to the first lens 50 changes, so that the boundary between the illuminated area and the non-illuminated area of the light irradiated onto the floor surface is clearly emphasized or blurred.

<Second Lens 60>
5 and 7, the second lens 60 is disposed on the optical axis closer to the ceiling surface than the second light source 21 and the second contour forming portion 40, and is held by the housing 31 so as to transmit light that has passed through the second contour forming portion 40. The second lens 60 is a light distribution control lens that controls the distribution of light irradiated from the second light source 21. The surface of the second lens 60 facing the second light source 21 has a shape that allows the light emitted from the second light source 21 to be taken into the second lens 60 with as little leakage as possible.

The second lens 60 changes its position relative to the second light source 21 and the second contour forming unit 40. That is, the control unit 70 controls the drive unit (not shown), and the second lens 60 moves vertically by the drive unit. Because the distance from the opening of the second contour forming unit 40 to the second lens 60 changes, the boundary between the illuminated area and the non-illuminated area of the light irradiated onto the ceiling surface is clearly emphasized or blurred.

<Control Unit 70>
3 and 5, the control unit 70 controls the light emission modes of the light emitted by the first light source 11 and the second light source 21. Specifically, the control unit 70 controls the first light source 11 and the second light source 21 such that the light emission modes of the light emitted by the first light source 11 and the second light source 21 are synchronized.

The light emission mode includes the color (color temperature, wavelength), brightness, blinking, etc., of the light emitted by the first light source 11 and the second light source 21. When the control unit 70 acquires light emission scene information indicating the light emission mode from the information processing device 5, it controls the first light source 11 and the second light source 21 according to the acquired light emission scene information. The light emission scene information includes light emission information indicating the light emission mode of the light emitted by the first light source 11 and the second light source 21, and aperture control information for controlling the shape of the opening (using the aperture blade 34a or the aperture blade 34b) of the first contour forming unit 30 and the second contour forming unit 40 for forming the first contour and the second contour, and the aperture diameter of the opening.

Furthermore, when the control unit 70 acquires light emission scene information indicating the light emission mode from the information processing device 5, the control unit 70 controls the first contour and the second contour of the light emitted by the first light source 11 and the second light source 21, respectively, according to the acquired light emission scene information. Specifically, the control unit 70 controls the first contour forming unit 30 and the second contour forming unit 40 to gradually change the first contour and the second contour so that they are synchronized.

The light emission scene information further includes aperture control information that controls the shape of the aperture (using aperture blade 34a or aperture blade 34b) of the first contour forming section 30 and the second contour forming section 40 for forming the first contour and the second contour, and the aperture diameter of the aperture.

The control unit 70 controls the drive units of the first contour forming unit 30 and the second contour forming unit 40 to change the shape and size of the opening by the multiple aperture blades of each of the first contour forming unit 30 and the second contour forming unit 40. As a result, the control unit 70 changes the first contour and the second contour of the light irradiated to the floor surface and the ceiling surface so that they are synchronized. The first contour and the second contour are synchronized means that the shape of the first contour and the shape of the second contour are approximately the same, that when the size of the first contour and the size of the second contour are different, the size of the first contour and the size of the second contour change in the same way (when the size of the first contour increases, the size of the second contour also increases, or vice versa), and that when the size of the first contour and the size of the second contour are the same, the size of the first contour and the size of the second contour change in the same way.

When the size of the first contour and the size of the second contour are made to coincide as shown in FIG. 4B, the first irradiation distance from the lighting device 3 to the first irradiation surface that forms the first contour and the second irradiation distance to the second irradiation surface that forms the second contour are different, so in this embodiment, this is achieved by using the following means.

By providing a distance sensor on the lighting device 3 or on a wall surrounding the lighting device 3, the distance sensor may measure a first irradiation distance from the lighting device to the first irradiation surface and a second irradiation distance from the lighting device 3 to the second irradiation surface. The control unit 70 may obtain information indicating the first irradiation distance and the second irradiation distance obtained from the distance sensor, and adjust the size of the opening of the first contour forming unit 30 and the second contour forming unit 40 according to the first irradiation distance and the second irradiation distance so that the size of the first contour and the size of the second contour match. The lighting system 1 may be equipped with such a distance sensor.

The control unit 70 may also have a table that adjusts the size of the openings of the first contour forming unit 30 and the second contour forming unit 40 so that the size of the first contour and the size of the second contour match based on the dimensions of the lighting device 3 and the installation position of the lighting device 3. The control unit 70 can match the size of the first contour and the size of the second contour based on the table.

The control unit 70 may also calculate the first irradiation distance and the second irradiation distance based on image information captured by the imaging unit 110. If the imaging unit 110 is a TOF (Time Of Flight) sensor, the control unit 70 may obtain information indicating the first irradiation distance and the second irradiation distance from the imaging unit 110, and adjust the size of the openings of the first contour forming unit 30 and the second contour forming unit 40 according to the first irradiation distance and the second irradiation distance so that the size of the first contour and the size of the second contour match.

Although the above method is an example of making the size of the first contour coincide with the size of the second contour, the method is not limited to this and other known means may be used.

The control unit 70 also acquires from the information processing device opening control information generated based on user information indicating the number of users present in a detection area detectable by the imaging unit 110 described later and the group presence area (sometimes simply referred to as the user presence area) defined by the arrangement of the users. The control unit 70 changes (controls) the size (i.e., diameter) of the first contour by controlling the first contour forming unit 30 based on the opening control information. The opening control information includes control information for setting the diameter of the first contour as the first diameter, or control information for setting the diameter of the first contour as the second diameter larger than the first diameter, etc. The opening control information is determined by the information processing device 5 based on the user information, so details will be described later. When the first contour is wavy, for example, the diameter of the first contour may be an average value defined by the maximum value of the first contour and the minimum value of the first contour. Note that the control unit 70 may control the second contour forming unit 40 in the same manner as in the case of controlling the first contour forming unit 30 described above.

The control unit 70 also changes the light distribution angle of the light emitted by the first light source 11 and the light distribution angle of the light emitted by the second light source 21 so that they are synchronized with each other. Specifically, the control unit 70 controls the first contour forming unit 30 and the second contour forming unit 40 so that the change in the emphasis degree of the first contour (the light gradation of the first contour portion) and the change in the emphasis degree of the second contour (the light gradation of the second contour portion) are synchronized. In other words, the control unit 70 changes the position of the first lens 50 relative to the first light source 11 and the first contour forming unit 30, and changes the position of the second lens 60 relative to the second light source 21 and the second contour forming unit 40. The control unit 70 changes the positions of the first lens 50 and the second lens 60 by a drive unit not shown. The control unit 70 also synchronizes the change (control) of the position of the first lens 50 and the second lens 60, such that when the first lens 50 is moved away from the first contour forming unit 30, the second lens 60 is also moved away from the second contour forming unit 40. As a result, the control unit 70 simultaneously clearly emphasizes or blurs the boundary between the illuminated area and non-illuminated area of the light illuminated on the floor surface and the boundary between the illuminated area and non-illuminated area of the light illuminated on the ceiling surface.

The control unit 70 also changes the color temperature of the light emitted by the first light source 11 and the second light source 21 in response to the biometric information. That is, the control unit 70 changes the color temperature of the light emitted by the first light source 11 and the second light source 21 based on the light emission information indicated in the light emission scene information (light emission scene information acquired from the information processing device 5) generated in response to the biometric information. The control unit 70 synchronizes the change in the color temperature of the light so that the light emitted by the first light source 11 and the second light source 21 has the same color temperature.

The control unit 70 may also change the light emission mode of each of the light emitted by the first light source 11 and the second light source 21, as well as the first contour and the second contour, according to the sound pressure level collected by the sound collection unit 120. Here, the sound pressure level collected by the sound collection unit 120 indicates, for example, the volume of the user's speech. In other words, the control unit 70 changes the light emission mode (color temperature, brightness, etc. of the light) of each of the light emitted by the first light source 11 and the second light source 21 based on the volume of the user's speech collected by the sound collection unit 120. For example, the control unit 70 synchronizes changes in the color temperature, brightness, etc. of the light emitted by each of the first light source 11 and the second light source 21.

The control unit 70 also causes the acoustic device 80 to output sound in response to the user's facial expression and biometric information. That is, the control unit 70 causes the acoustic device 80 to output sound based on the light emission information (light emission information acquired from the information processing device 5) indicated in the music information generated in response to the user's facial expression and biometric information. The control unit 70 also causes the acoustic device 80 to output sound in synchronization with the respective lights emitted by the first light source 11 and the second light source 21. That is, the control unit 70 changes the sound output from the acoustic device 80 or changes the volume in response to changes in the light emission state of the respective lights emitted by the first light source 11 and the second light source 21.

<Audio Device 80>
The acoustic device 80 is a speaker that outputs sounds stored in a storage unit (not shown) in accordance with the facial expression and biometric information of the user recognized by the information processing device 5. That is, the acoustic device 80 outputs sounds based on music information (music information acquired from the information processing device 5) generated in accordance with the facial expression and biometric information of the user. In this embodiment, the acoustic device 80 plays music that relaxes the user, music that activates the user, etc. in accordance with the facial expression and biometric information of the user.

The sound device 80 is placed on the floor side of the housing 31 and is held in the housing 31 so as to emit sound toward the floor. In other words, the sound device 80 is placed in a position in which it outputs sound toward a user present below the lighting device 3. In addition, in this embodiment, the sound device 80 is housed in the housing 31 of the lighting device 3, but it may be installed on the ceiling or the like, and may not be housed in the housing 31.

The acoustic device 80 has a speaker grill 81 that covers a portion of the opening of the housing 31, and a speaker body 82 that outputs sound. When the lighting device 3 is viewed vertically upward, the speaker grill 81 is disposed closer to the floor surface of the housing 31 than the first lens 50 so as to cover the speaker body 82 and surround the first lens 50.

In this embodiment, the audio device 80 may be a sound player equipped with a speaker. In this case, the control unit 70 or the information processing device 5 stores music, software for playing music, etc.

The audio device 80 may be a directional speaker. For example, the audio device 80 may output sound so that only users who are within the first contour illuminated by the lighting device 3 can hear the music.

<First Communication Unit 90>
The first communication unit 90 is a communication module (communication interface) that receives information such as light emission scene information, music information, and fragrance information from the information processing device 5. The first communication unit 90 acquires each piece of information through wireless communication or wired communication with the information processing device 5. The first communication unit 90 outputs each piece of acquired information to the control unit 70. In the present embodiment, the first communication unit 90 communicates with the information processing device 5 through a wired communication cable.

[Information processing device 5]
By detecting users, the information processing device 5 generates light-emitting scene information for changing the light-emitting mode of the lighting device 3, generates music information to be output from the audio device 80, and generates fragrance information for emitting a fragrance from the fragrance device 130, depending on the number of users present in the room, the user's mood, biometric information indicating the user's physical condition, the indoor environment, etc.

In addition, the information processing device 5 periodically acquires weather information such as temperature and humidity from an external server 300 via the network. The information processing device 5 periodically acquires weather information from an external server 300 connected to the network via the first communication unit 90.

The information processing device 5 has an imaging unit 110, a sound collection unit 120, a fragrance device 130, a processing unit 140, a power supply unit 150, and a second communication unit 160.

<Image capture unit 110>
The imaging unit 110 is an image sensor that outputs an image of the user's facial expression. The imaging unit 110 is installed on a ceiling, a wall, or the like so that the user's facial expression can be captured. When the imaging unit 110 captures the user's facial expression, it outputs the image information showing the user's facial expression to the processing unit 140. In this embodiment, the imaging unit 110 captures the user's facial expression and outputs the image information showing the user's facial expression to the processing unit 140. The user's facial expression captured by the imaging unit 110 includes the user's eye movement, mouth movement, and the like. The user's facial expression may include not only the face but also the user's leg movement, torso movement, hand movement, head movement, and the like. The image information may include not only still images but also moving images.

The imaging unit 110 also recognizes the number of users and their layout, and outputs the recognition results to the processing unit 140. Specifically, the imaging unit 110 recognizes the number of users present in the detection area and the layout of the users (such as the degree of dispersion of the users), generates user information indicating the number of users and the layout of the users, and outputs the generated user information to the processing unit 140.

The imaging unit 110 may be mounted on the lighting device 3, and it is not essential that it be installed on a wall, ceiling, etc., or mounted on the information processing device 5.

<Sound collection unit 120>
The sound collection unit 120 is a microphone that collects sounds around the user. Specifically, the sound collection unit 120 not only collects environmental sounds around the sound collection unit 120, but also actively collects the user's speech. The sound collection unit 120 outputs sound collection information indicating the collected sound to the processing unit 140. In this embodiment, the sound collection unit 120 collects the voice generated by the user's speech and outputs sound collection information indicating the voice to the processing unit 140.

The sound collection unit 120 may be a directional microphone that is highly directional toward the area in which the user is present so that it can collect the user's voice.

The sound collection unit 120 may be mounted on the lighting device 3 or installed on the ceiling, wall, etc.

<Fragrance device 130>
The fragrance device 130 is a dispenser such as a spray can that contains a liquid fragrance. The fragrance device 130 generates a fragrance in response to the facial expression and biometric information of the user recognized by the information processing device 5. In the present embodiment, the fragrance device 130 generates a fragrance based on fragrance information generated by the processing unit 140 in response to the facial expression and biometric information of the user.

When the fragrance device 130 acquires fragrance information from the processing unit 140, the button on the spray can is pressed to spray the liquid fragrance. The fragrance device 130 also emits a fragrance from the fragrance device 130 in synchronization with the light emitted by the first light source 11 and the second light source 21.

The fragrance device 130 may be mounted on the lighting device 3 or installed on the ceiling, wall, etc.

<Processing Unit 140>
When the processing unit 140 acquires image information from the imaging unit 110, it recognizes the user's facial expression shown in the image indicated by the image information. That is, the processing unit 140 not only identifies the position of the user's face by image recognition, but also reads the user's facial expression from the user's facial features such as the movement of the user's eyes, mouth, and cheeks. For example, if there is not much change in the movement of the user's eyes, cheeks, etc., the processing unit 140 recognizes that the facial expression is tense. Also, if the movement of the user's eyes, cheeks, etc. changes drastically, the processing unit 140 recognizes that the conversation is lively, that the facial expression is a laughing expression, a sleepy expression, etc. Also, if the movement of the user's eyes, cheeks, etc. changes gradually, the processing unit 140 recognizes that the facial expression is normal. Note that, although the facial expressions to be recognized are given here as examples, they are not limited to these.

The processing unit 140 determines the light emission mode of the light emitted by the first light source 11 and the second light source 21, and the first and second contours, according to the recognized facial expression and biometric information of the user. The processing unit 140 further determines the light emission mode of the light emitted by the first light source 11 and the second light source 21, and the first and second contours, taking into account the sound pressure level of the sound collected by the sound collection unit 120. In this embodiment, the processing unit 140 determines the light emission mode of the light emitted by the first light source 11 and the second light source 21, and the first and second contours, based on the recognized facial expression of the user, the body temperature and pulse rate indicated in the biometric information, and the sound pressure level of the voice uttered by the user. In addition, the processing unit 140 may further determine the light emission mode of the light emitted by the first light source 11 and the second light source 21, and the first and second contours, taking into account meteorological information. Specific details of the determination will be described later.

The processing unit 140 also determines the size of the first contour and the size of the second contour based on the user information acquired from the imaging unit 110. Specifically, the processing unit 140 determines the size of the first contour (the area within the first contour) based on the presence area of the group defined by the number of users and the user arrangement indicated in the user information. In other words, in order to irradiate the group with light, the processing unit 140 determines the size of the first contour so that it is equal to or larger than the size of the presence area. Specifically, the processing unit 140 calculates a first distance from the lighting device 3 (i.e., the first light source 11) to the user from the number of users and the arrangement of the users (user presence area) indicated in the user information.

When the calculated first distance is equal to or less than a threshold, the processing unit 140 sets the diameter of the first contour to the first diameter. This is the case when a user is present near the lighting device 3, and the processing unit 140 makes the user near the lighting device 3 fit within the first contour (surround the user with the first contour). Specifically, in order to set the diameter of the first contour to the first diameter, the processing unit 140 determines the diameter of the opening of the first contour forming unit 30, and generates opening control information including control information for controlling the first contour forming unit 30 to achieve the determined opening diameter. The processing unit 140 then transmits the generated opening control information to the lighting device 3.

Furthermore, when the calculated first distance is greater than a threshold value, the processing unit 140 sets the diameter of the first contour to a second diameter smaller than the first diameter. This is the case when a user is present far from the lighting device 3, and the processing unit 140 makes sure that the user who is far from the lighting device 3 is not included in the first contour, and that the user who is present close to the lighting device 3 is included in the first contour. Specifically, in order to set the diameter of the first contour to the second diameter, the processing unit 140 determines the diameter of the opening of the first contour forming unit 30, and generates opening control information including control information for controlling the first contour forming unit 30 to obtain the determined opening diameter. The processing unit 140 then transmits the generated opening control information to the lighting device 3.

Also, since users within a group may move slightly, the size of the first contour may be increased by several tens of percent of the area of existence. The processing unit 140 also increases the size of the second contour so that it is synchronized with the size of the first contour.

In addition, the processing unit 140 causes the fragrance device 130 to emit a fragrance in synchronization with the light emitted by the first light source 11 and the second light source 21 according to the recognized facial expression and biometric information of the user. When there are multiple spray cans, the processing unit 140 changes the fragrance emitted from the fragrance device 130 according to changes in the light emission state of the light emitted by the first light source 11 and the second light source 21.

<Power supply unit 150>
The power supply unit 150 has a function of supplying power to each unit of the lighting device 3. The power supply unit 150 is, for example, a power supply circuit in which a plurality of electronic components are mounted on a printed circuit board. The power supply unit 150 generates, for example, a driving power for causing each of the first light source 11 and the second light source 21 to emit light. Specifically, the power supply unit 150 generates a driving power for causing the first light source 11 and the second light source 21 to emit light, and supplies this driving power to the first light source 11 and the second light source 21. For example, when the lighting device 3 is connected to a commercial AC power source by a plug or the like, the power supply unit 150 converts the AC power into DC power, which is the driving power. The power supply unit 150 supplies this DC power to the first light source 11 and the second light source 21 as the driving power for causing the first light source 11 and the second light source 21 to emit light.

<Second Communication Unit 160>
The second communication unit 160 is a communication module (communication interface) that transmits information such as light-emitting scene information, music information, and fragrance information to the lighting device 3. The second communication unit 160 acquires each piece of information through wireless communication or wired communication with the lighting device 3. In the present embodiment, the second communication unit 160 communicates with the lighting device 3 through a wired communication cable.

[Terminal Device 7]
The terminal device 7 is a wearable terminal that is carried by a user to acquire biometric information indicating the user's physical condition and output the acquired biometric information. The terminal device 7 acquires biometric information indicating the user's physical condition using a millimeter wave sensor or the like. The biometric information includes at least one of information indicating the user's pulse rate and body temperature information indicating the user's body temperature. In other words, the terminal device 7 detects the user's body temperature and pulse rate at predetermined intervals to generate biometric information and transmits the generated biometric information to the information processing device 5. Note that the terminal device 7 may acquire biometric information using an app on a smartphone or the like, and is not limited to being worn on the body. The terminal device 7 is an example of a sensor.

[Action]
Next, the operation of the lighting device 3 and the lighting system 1 will be described.

Figure 8 is a flow diagram illustrating the operation of the information processing device 5 of the lighting system 1 according to the embodiment. Here, it is assumed that the lighting device 3 is in a state in which light is already irradiated onto the floor surface, that is, an illuminated area of light is formed on the floor surface.

As shown in FIG. 8, the processing unit 140 determines whether the presence of a user has been detected by the imaging unit 110 (S1). In other words, it determines whether the user has entered or touched the illumination area of the light irradiated on the floor surface.

When a user enters or comes into contact with the light-illuminated area, the imaging unit 110 detects the user (Yes in S1), and the processing unit 140 acquires user information indicating the number of users and their positions (S2). Specifically, when a user enters the light-illuminated area, the imaging unit 110 recognizes the number of users and their positions, and generates user information indicating the number of users and their positions. The imaging unit 110 outputs the generated user information to the processing unit 140.

On the other hand, if the user does not enter or touch the light-illuminated area, the image capture unit 110 cannot detect the user (No in S1), and the processing unit 140 repeats the same process or puts the process on hold until the image capture unit 110 detects the user.

The processing unit 140 determines the size of the first contour and the size of the second contour based on the user information acquired from the imaging unit 110 (S3).

The imaging unit 110 also generates image information indicating an image capturing the facial expression of each user, and outputs the generated image information to the processing unit 140. The processing unit 140 acquires the image information from the imaging unit 110 (S4). When the processing unit 140 acquires the image information from the imaging unit 110, it recognizes the facial expression of the user that appears in the image indicated by the image information. For example, the processing unit 140 recognizes a tense expression, a laughing expression, a sleepy expression, a normal expression, etc.

The imaging unit 110 may generate image information and user information in parallel, or may output the image information and user information together to the processing unit 140. Therefore, the processes of steps S2 and S4 may be performed together.

The sound collection unit 120 also generates sound collection information indicating the sound generated by the user's speech, and outputs the generated sound collection information to the processing unit 140. The processing unit 140 acquires the sound collection information from the sound collection unit 120 (S5). Upon acquiring the sound collection information from the sound collection unit 120, the processing unit 140 recognizes the level of the user's sound pressure indicated by the sound collection information.

The terminal device 7 also acquires biometric information indicating the user's physical condition, and outputs the acquired biometric information to the processing unit 140. The processing unit 140 acquires the biometric information from the terminal device 7 (S6). For example, when the processing unit 140 acquires the biometric information from the terminal device 7, it recognizes a change in the user's pulse rate indicated by the biometric information.

The order of steps S4 to S6 is not limited to this, and any order may be used. These processes may also be performed simultaneously in parallel. In other words, the processing unit 140 may simultaneously acquire image information, sound collection information, and biometric information.

The processing unit 140 determines whether the user's facial expression is the first facial expression, the sound pressure level is equal to or lower than the first level, and the pulse rate is equal to or higher than a specified pulse rate value from the image information, sound collection information, and biometric information obtained in steps S4 to S6 (S7). For example, the first facial expression is a tense facial expression, the first level is approximately 50 dB, and the specified pulse rate value is the average value of a normal pulse rate. Note that the first facial expression, the first level, and the specified pulse rate value are merely examples and are not limited to these.

When the user's facial expression is tense (first facial expression), the sound pressure level is about 50 dB (first level) or less, and the pulse rate is the average value (prescribed pulse rate value) or more, it is considered that the user is seriously working on some task. For this reason, it is necessary to provide the user with an environment in which he or she can concentrate. When the processing unit 140 recognizes the user's tense facial expression, determines that the user's sound pressure level is about 50 dB or more, and determines that the pulse rate is higher than the average value (Yes in S7), it determines the light emission scene (S8). That is, the processing unit 140 generates light emission information that sets the color temperature of the light, which is the light emission mode of the light emitted by the first light source 11 and the second light source 21, to about 3500 K. In addition, the processing unit 140 generates opening control information that clearly emphasizes the boundary between the light irradiation area and the non-irradiation area of the light in the first contour and the second contour, and does not move the first contour and the second contour. The processing unit 140 outputs the light emission scene information including the generated light emission information and opening control information to the lighting device 3.

The processing unit 140 may also determine fragrance information and music information to output fragrance and music corresponding to the light-emitting scene determined in step S8.

If any of the conditions in step S7 is not met (No in S7), the processing unit 140 determines whether the user's facial expression is the second facial expression, the sound pressure level is at or above the second level, and the pulse rate is changing rapidly from the image information, sound collection information, and biometric information obtained in steps S4 to S6 (S9). For example, the second facial expression is a sleepy expression, and the second level is about 60 dB. A rapid change in pulse rate refers to, for example, a change of several tens of percent between the pulse rate before the change and the pulse rate at each change. Note that the second facial expression and the second level are merely examples and are not limited to these.

When the user's facial expression is a sleepy expression (second facial expression), the sound pressure level is about 60 dB (second level) or more, and the pulse rate changes rapidly, it is considered that the user is in a state of being overcome by drowsiness. For this reason, it is necessary to provide an environment that wakes up the user. When the processing unit 140 recognizes the user's sleepy facial expression, determines that the user's sound pressure level is about 60 dB or more, and determines that the pulse rate is changing rapidly (Yes in S9), it determines a light-emitting scene (S10). That is, the processing unit 140 generates light-emitting information that sets the color temperature of the light, which is the light-emitting mode of the light emitted by the first light source 11 and the second light source 21, to about 6500 K and blinks the light for a predetermined period of time. In addition, the processing unit 140 generates opening control information that clearly emphasizes the boundary between the light-illuminated area and the non-illuminated area of the light in the first contour and the second contour, and does not move the first contour and the second contour. The processing unit 140 outputs light-emitting scene information including the generated light-emitting information and opening control information to the lighting device 3.

The processing unit 140 may also determine fragrance information and music information to output fragrance and music corresponding to the light-emitting scene determined in step S10.

If any one of the conditions in step S9 is not met (No in S9), the processing unit 140 determines whether the user's facial expression is the third facial expression, the sound pressure level is at or above the second level, and the pulse rate is at or above the specified pulse rate from the image information, sound collection information, and biometric information obtained in steps S4 to S6 (S11). For example, the third facial expression is a laughing facial expression, and the second level is approximately 60 dB. Note that the third facial expression is an example and is not limited to these.

When the user's facial expression is a laughing facial expression (third facial expression), the sound pressure level is about 60 dB (second level) or more, and the pulse rate is the average value (prescribed pulse rate) or more, the user's state is considered to be a state of lively conversation. For this reason, it is necessary to provide the user with an environment that encourages more active conversation. Therefore, the processing unit 140 recognizes the user's laughing facial expression, determines that the user's sound pressure level is about 60 dB or more, and determines that the pulse rate is higher than the average value (Yes in S11), and determines the light emission scene (S12). In other words, the processing unit 140 generates light emission information that sets the color temperature of the light, which is the light emission mode of the light emitted by the first light source 11 and the second light source 21, to about 5000 K. In addition, the processing unit 140 generates aperture control information that blurs the boundary between the light irradiation area and the non-irradiation area of the light in the first contour and the second contour, makes the shape of the first contour and the second contour wavy, and moves the first contour and the second contour so as to waver (rotates the aperture blades). The processing unit 140 outputs the generated light-emitting scene information, including the light-emitting information and aperture control information, to the lighting device 3.

The processing unit 140 may also determine fragrance information and music information to output fragrance and music corresponding to the light-emitting scene determined in step S12.

If any one of the conditions in step S11 is not met (No in S11), the processing unit 140 determines whether the user's facial expression is the third facial expression, the sound pressure level is equal to or lower than the third level, and the pulse rate is less than the specified pulse rate from the image information, sound collection information, and biometric information obtained in steps S4 to S6 (S13). For example, the fourth facial expression is a normal facial expression, and the third level is about 30 dB. Note that the fourth facial expression is an example and is not limited to these.

When the user's facial expression is a normal facial expression (fourth facial expression), the sound pressure level is about 30 dB (third level) or more, and the pulse rate is less than the average value (prescribed pulse rate), the user's state is considered to be a calm and normal state. For this reason, it is necessary to provide the user with an environment that allows them to relax. Therefore, the processing unit 140 recognizes the user's normal facial expression, determines that the user's sound pressure level is about 30 dB or less, and determines that the pulse rate is lower than the average value (Yes in S13), and determines the light emission scene (S14). That is, the processing unit 140 generates light emission information that sets the color temperature of the light, which is the light emission mode of the light emitted by the first light source 11 and the second light source 21, to about 2400 K. In addition, the processing unit 140 generates aperture control information that blurs the boundary between the light irradiation area and the non-irradiation area in the first contour and the second contour, and gradually changes the size of each of the first contour and the second contour by increasing or decreasing it (increasing or decreasing the aperture diameter of the aperture blade). The processing unit 140 outputs the generated light-emitting scene information, including the light-emitting information and aperture control information, to the lighting device 3.

The processing unit 140 may also determine fragrance information and music information to output fragrance and music corresponding to the light-emitting scene determined in step S14.

If any of the conditions in step S13 is not satisfied (No in S13), the processing unit 140 determines the predetermined light-emitting scene (S15) and outputs the determined light-emitting scene information to the lighting device 3. Then, the information processing device 5 ends this process.

In this way, when the lighting device 3 acquires the light-emitting scene information determined by the information processing device 5, it illuminates according to the acquired light-emitting scene information. Note that in this embodiment, the user states are exemplified as a state of lively conversation, a normal, calm state, a state of being seriously engaged in some task, and a state of being overcome by drowsiness, but are not limited to these. Therefore, the flow diagram of the information processing device 5 is also not limited to this embodiment.

Next, we will explain the process of determining the diameter of the first contour.

Figure 9 is a flow diagram illustrating an example of an operation for determining the diameter of the first contour in the information processing device 5 of the lighting system 1 according to the embodiment. Here, the first contour is assumed to have a circular shape.

As shown in FIG. 9, first, the processing unit 140 acquires user information from the imaging unit 110 (S31).

Next, the processing unit 140 determines the size of the first contour based on the number of users indicated in the user information and the location of the users (area in which the users exist) (S32). Specifically, the processing unit 140 calculates a first distance from the lighting device 3 to each user based on the number of users and the location of the users indicated in the user information.

Next, the processing unit 140 determines whether the calculated first distance is less than or equal to a threshold value (S33).

If the calculated first distance is equal to or less than the threshold (Yes in S33), the processing unit 140 determines the diameter of the first contour to be the first diameter (S34). In other words, all users present near the lighting device 3 are included within the first contour.

Next, the processing unit 140 generates opening control information that is control information for controlling the diameter of the opening of the first contour forming unit 30 and includes control information for setting the diameter of the first contour to the first diameter. Then, the processing unit 140 transmits the generated opening control information to the lighting device 3 via the second communication unit 160 (S35). Then, the information processing device 5 ends the processing.

If the calculated first distance is greater than the threshold value (No in S33), the processing unit 140 determines the diameter of the first contour to be the second diameter (S36). In other words, the processing unit 140 does not include users who are far from the lighting device 3 within the first contour, and includes users who are close to the lighting device 3 within the first contour.

Next, the processing unit 140 generates opening control information that is control information for controlling the diameter of the opening of the first contour forming unit 30 and includes control information for setting the diameter of the first contour to the second diameter. Then, the processing unit 140 transmits the generated opening control information to the lighting device 3 via the second communication unit 160 (S37). Then, the information processing device 5 ends the processing.

[Action and Effect]
Next, the effects of the lighting device 3 and the lighting system 1 in this embodiment will be described.

As described above, the lighting device 3 according to this embodiment is a lighting device that irradiates light in a first direction and a second direction opposite to the first direction. The lighting device 3 synchronizes a first contour of the light in the first direction irradiated onto the irradiated surface with a second contour of the light in the second direction irradiated onto the irradiated surface.

This makes it possible to simultaneously illuminate, for example, part of the floor and part of the ceiling. This makes the illuminated area on the floor appear to float from the illuminated area on the ceiling. In other words, it is possible to create an effect in which the space formed by the illuminated area of light is separated from the rest of the space.

Therefore, this lighting device 3 can create a space that is created by light.

In addition, the lighting device 3 according to this embodiment further includes a control unit 70 that controls the first contour and the second contour in response to biometric information indicating the user's physical condition detected by the terminal device 7.

This allows the first contour and the second contour to be changed in response to the biometric information. For example, the size of the first contour and the second contour can be changed, or the shape of the first contour and the second contour can be changed, in response to the user's actions. This makes it possible to realize a performance based on the user's actions through lighting.

The lighting system 1 according to this embodiment also includes a lighting device 3, a terminal device 7 that outputs biometric information acquired by detecting the user's physical condition to an information processing device 5, and an information processing device 5 that determines the emission modes of the light emitted by the first light source 11 and the second light source 21, as well as the first contour and the second contour, based on the biometric information.

This lighting system 1 also provides the same effects as described above.

In addition, in the lighting device 3 according to this embodiment, the control unit 70 controls the first contour and the second contour to be wavy.

This allows the rippling movement of the first and second contours to be expressed with light. This makes it possible to use lighting to create effects that correspond to the user's actions.

In addition, in the lighting device 3 according to this embodiment, the control unit 70 controls the first contour and the second contour to coincide with each other.

This allows the space from the illuminated area on the ceiling surface to the illuminated area on the floor surface to be expressed as a single unit using light. This allows the user to see a clearer separation between the space formed by the illuminated area and the rest of the space.

The lighting device 3 according to this embodiment includes a first light source 11 that irradiates light in a first direction, a second light source 21 that irradiates light in a second direction, a first contour forming unit 30 that forms a first contour of the light irradiated by the first light source 11 onto the irradiation surface, and a second contour forming unit 40 that forms a second contour of the light irradiated by the second light source 21 onto the irradiation surface. The control unit 70 controls the light emission modes of the first light source 11 and the second light source 21 to be synchronized, and controls the first contour forming unit 30 and the second contour forming unit 40 to be synchronized.

This allows the lighting conditions of the ceiling and floor surfaces to be synchronized with the contours of the ceiling and floor surfaces, creating a unified light space. This allows the user to see a clearer separation between the space formed by the light-illuminated area and the rest of the space.

In addition, in the lighting device 3 according to this embodiment, the light emission mode includes the color temperature and brightness of the light emitted by the first light source 11 and the second light source 21.

This allows the color temperature and brightness of the ceiling and floor surfaces to be synchronized. This allows the lighting to create effects that correspond to the user's actions.

In addition, in the lighting device 3 according to this embodiment, the control unit 70 gradually changes the first contour and the second contour by controlling the first contour forming unit 30 and the second contour forming unit 40.

This allows the contour to change gradually in response to biometric information, for example. This makes it possible to use lighting to create a presentation that corresponds to the user's actions. Furthermore, the gradual change in the contour makes it less likely that the user will feel uncomfortable.

In addition, in the lighting device 3 according to this embodiment, the control unit 70 changes the light distribution angle of the light emitted by the first light source 11 and the light distribution angle of the light emitted by the second light source 21 so that they are synchronized with each other.

This allows the boundary between the illuminated and non-illuminated areas to be clearly emphasized or blurred. This allows the boundary to be changed according to biometric information. This makes it possible to use lighting to create effects that correspond to the user's actions.

In addition, in the lighting system 1 according to this embodiment, the biometric information includes at least one of information indicating the user's pulse rate and information indicating the user's body temperature.

This allows the user's physical condition to be accurately recognized. Therefore, the lighting system 1 can provide lighting consisting of a light emission mode, a first contour, and a second contour according to the biometric information, i.e., according to the user's condition. In other words, it is possible to realize a performance according to the user's behavior through lighting.

The lighting system 1 according to this embodiment further includes an imaging unit 110 that outputs an image capturing the facial expression of the user. The information processing device 5 recognizes the facial expression of the user captured in the image output by the imaging unit 110, and determines the light emission modes of the light emitted by the first light source 11 and the second light source 21, as well as the first contour and the second contour, according to the recognized facial expression and biometric information of the user.

This allows the system to recognize the user's facial expressions and grasp the user's condition more accurately. This allows lighting to be used to create effects that correspond to the user's actions.

The lighting system 1 according to this embodiment further includes a sound collection unit 120 that collects sounds around the user. The control unit 70 further determines the light emission state of the light emitted by the first light source 11 and the second light source 21, as well as the first contour and the second contour, according to the sound pressure level collected by the sound collection unit 120.

This allows the user's condition to be grasped more accurately by recognizing the sound around the user, for example the volume level of the user's speech. This makes it possible to realize effects based on the user's actions through lighting.

The lighting system 1 according to this embodiment further includes an audio device 80 that outputs sound. The audio device 80 outputs sound in response to the facial expression and biometric information of the user recognized by the information processing device 5.

This allows sounds to be output to the user, making it possible to realize effects that correspond to the user's actions.

The lighting system 1 according to this embodiment further includes a fragrance device 130 that emits a fragrance. The fragrance device 130 emits a fragrance in response to the facial expression and biometric information of the user recognized by the information processing device 5.

This allows the fragrance to be emitted towards the user, making it possible to realize effects that correspond to the user's actions.

(Other Modifications)
Although the lighting device and lighting system according to the present disclosure have been described based on the above-mentioned 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, modifications that are conceivable by a person skilled in the art may also be included within the scope of the present disclosure.

For example, in the lighting device and lighting system according to the above-described embodiment, the number of users and their locations are recognized by the imaging device, but the number of users and their locations may be detected by using a human presence sensor. The human presence sensor may be mounted in the lighting device, in the information processing device, or provided separately from the lighting device and the information processing device.

In addition, in the lighting device and lighting system according to the above-described embodiment, the imaging unit or processing unit may recognize the state of the user, such as the user's standing posture and sitting posture. The processing unit may change the size of the first contour illuminated by the lighting device according to the user's posture. For example, in the case of a sitting posture, the size of the first contour of the light emitted by the lighting device may be larger than in the case of a standing posture.

In the lighting device and lighting system according to the above-mentioned embodiment, the lighting device has a first light source and a second light source, but may have only one light source. In this case, the light emitted by the light source may be divided into a first direction and a second direction by a lens or the like, and the light may be irradiated in the first direction and the second direction.

In addition, in the lighting device and lighting system according to the above-described embodiment, the light emitted by the first light source and the second light source may be a halo that constitutes the first contour and the second contour. In other words, the light emitted by the first light source and the second light source may be a ring-shaped light (i.e., a halo), and the object may be contained inside the halo.

Furthermore, each processing unit included in the lighting device and lighting system according to the above-mentioned embodiment is typically realized as an LSI, which is an integrated circuit. These may be individually implemented as single chips, or may be integrated into a single chip to include some or all of them.

In addition, the integrated circuit is not limited to LSI, but may be realized by a dedicated circuit or a general-purpose processor. It is also possible to use an FPGA (Field Programmable Gate Array) that can be programmed after LSI manufacturing, or a reconfigurable processor that can reconfigure the connections and settings of circuit cells inside the LSI.

In each of the above embodiments, each component may be configured with dedicated hardware, or may be realized by executing a software program suitable for each 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.

Furthermore, all the numbers used above are merely examples to specifically explain this disclosure, and the embodiments of this disclosure are not limited to the numbers shown as examples.

The division of functional blocks in the block diagram is one example, and multiple functional blocks may be realized as one functional block, one functional block may be divided into multiple blocks, or some functions may be transferred to other functional blocks. In addition, the functions of multiple functional blocks having similar functions may be processed in parallel or in a time-sharing manner by a single piece of hardware or software.

The order in which each step in the flowchart is performed is merely an example to specifically explain the present disclosure, and orders other than those described above may also be used. Some of the steps may also be performed simultaneously (in parallel) with other steps.

This disclosure also includes forms obtained by applying various modifications to the above-described embodiments that would come to mind by a person skilled in the art, and forms realized by arbitrarily combining the components and functions of each embodiment without departing from the spirit of this disclosure.

1 Lighting system 3 Lighting device 5 Information processing device 7 Terminal device (sensor)
Reference Signs List 11 First light source 21 Second light source 30 First contour forming section 40 Second contour forming section 70 Control section 80 Acoustic device 110 Imaging section 120 Sound collecting section 130 Fragrance device

Claims (13)

A lighting device that emits light in a first direction and a second direction opposite to the first direction,
A first light source that irradiates light in the first direction;
a second light source that irradiates light in the second direction,
the first light source and the second light source are arranged such that an optical axis of the first light source and an optical axis of the second light source are substantially parallel to the first direction and the second direction,
Synchronizing a first contour of the light in the first direction irradiated onto an irradiation surface with a second contour of the light in the second direction irradiated onto an irradiation surface ;
The sensor further includes a control unit that controls the first contour and the second contour in response to biological information indicating a physical condition of the user detected by the sensor.
Lighting equipment. The lighting device according to claim 1 , wherein the control unit controls the first contour and the second contour to have a wavy shape. The lighting device according to claim 1 , wherein the control unit performs control so that the first contour and the second contour coincide with each other. a first contour forming section that forms the first contour of light irradiated onto an irradiation surface by the first light source;
a second contour forming unit that forms the second contour of the light irradiated onto the irradiation surface by the second light source,
The lighting device according to any one of claims 1 to 3, wherein the control unit controls the light emission modes of the first light source and the second light source to be synchronized, and controls the first contour forming unit and the second contour forming unit to be synchronized with each other. The lighting device according to claim 4 , wherein the light emission aspects include color temperatures and brightnesses of the lights emitted by the first light source and the second light source. The lighting device according to claim 4 , wherein the control unit controls the first contour forming unit and the second contour forming unit to gradually change the first contour and the second contour. The lighting device according to claim 4 , wherein the control unit changes a light distribution angle of the light emitted by the first light source and a light distribution angle of the light emitted by the second light source so as to be synchronized with each other. The lighting device according to any one of claims 4 to 7 ,
A sensor that outputs the bioinformation acquired by detecting a physical condition of a user;
an information processing device that determines the light emission modes of the light emitted by the first light source and the second light source, and the first contour and the second contour based on the biological information. The lighting system according to claim 8 , wherein the biological information includes at least one of information indicating a pulse rate of the user and information indicating a body temperature of the user. Further, an imaging unit is provided for outputting an image obtained by capturing a facial expression of the user,
The information processing device includes:
Recognizing a facial expression of the user appearing in the image output by the imaging unit;
The lighting system according to claim 8 or 9, further comprising: determining the light emission modes of the light emitted by the first light source and the second light source, and the first contour and the second contour, in accordance with the recognized facial expression and the biometric information of the user. Further, the device includes a sound collection unit that collects sounds around the user,
The lighting system according to claim 10 , wherein the control unit further determines the light emission modes of the light irradiated by the first light source and the second light source, and the first contour and the second contour, in accordance with a sound pressure level of the sound collected by the sound collection unit . Further, an audio device for outputting sound is provided,
The lighting system according to claim 10 , wherein the sound device outputs a sound in response to a facial expression and the biological information of the user recognized by the information processing device. Further, a fragrance device for emitting a fragrance is provided,
The lighting system according to claim 10 , wherein the fragrance device emits a fragrance in response to a facial expression of the user and the biological information recognized by the information processing device.

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