JP7178005B2 - Lighting system and lighting method - Google Patents

Description

The present disclosure relates to lighting systems and lighting methods.

BACKGROUND ART Conventionally, techniques for creating a space by emitting light into the space have been proposed. For example, in Patent Document 1, an indirect lighting device installed on a wall surface called a peripheral unit is used to emit light from a light source that is hidden and cannot be directly viewed by reflection on a reflective panel or ceiling. By projecting it indirectly into the space, the space is produced so as to emphasize the height of the ceiling and the breadth of the walls.

JP 2011-210594 A

However, in the technique disclosed in Patent Document 1, no effective proposal is made to sufficiently sustain the psychological state caused by the light emitted into the space in the user of the space.

The present disclosure has been made in consideration of the above points, and aims to provide a lighting system and a lighting method that can sufficiently sustain the psychological state caused by the light emitted into the space in the users of the space. aim.

A lighting system according to the present disclosure includes:
a lighting device that emits light into space;
A light of a first color for causing a target mental state in a user of the space and a light of a second color for causing the user to have the mental state are selectively emitted. and a control unit that controls the lighting device such that
The control unit
The light of the first color is emitted for an emission time equal to or less than a first duration during which the psychological state is maintained by the light of the first color, and the light of the second color is used to maintain the psychological state. Controlling the lighting device to emit light of the second color with an emission time of 2 or less.

In a lighting system according to the present disclosure,
The control unit
Emit the light of the first color for an emission time equal to or less than the first duration, and emit the light of the second color for an emission time equal to or less than the second duration at a preset set time. You may control the said illuminating device so that it may carry out.

In a lighting system according to the present disclosure,
the first duration is less than the second duration;
The control unit
If the set time is less than the first duration, controlling the lighting device to emit only the first color light for an emission time less than the first duration during the set time. Alternatively, the lighting device may be controlled to emit only light of the second color at the set time with an emission time less than the second duration.

In a lighting system according to the present disclosure,
The control unit
light of the first color during the set time when the set time is greater than or equal to the first duration and less than the total time of the first duration and the second duration at the first duration and controlling the lighting device to emit light of the second color for an emission time less than the second duration; The lighting device may be controlled to emit light of one color for an emission time less than the first duration and to emit light of the second color for the second duration.

In a lighting system according to the present disclosure,
The control unit
if the set time is greater than or equal to the total time, calculating the number of total times that can be allocated within the set time;
The illumination device may be controlled to emit the light of the first color and the light of the second color with the number of times of emission and the emission time corresponding to the calculated number of total times.

In a lighting system according to the present disclosure,
The control unit
The illumination device may be controlled to switch from one of the first color light emission and the second color light emission to the other over a preset switching time.

In a lighting system according to the present disclosure,
The control unit
The illumination device may be controlled to emit light of a third color positioned on a straight line connecting the first color and the second color in the chromaticity diagram during the switching time.

In a lighting system according to the present disclosure,
further comprising an input unit for inputting an instruction to change the state of mind to the control unit;
The control unit may change the state of mind and the color of light for causing the state of mind in the user in accordance with the instruction to change the state of mind.

In a lighting system according to the present disclosure,
The input unit inputs an instruction to change the set time to the control unit,
The control unit changes the set time and at least one of the emission time and the number of times of emission of at least one of the first and second color lights during the set time in response to an instruction to change the set time. You may

In a lighting system according to the present disclosure,
Further comprising a detection unit that detects the usage status of the space by the user,
The control unit may change the state of mind and the color of the light for causing the state of mind in the user, according to the detected state of use.

In a lighting system according to the present disclosure,
The control unit changes the set time and at least one of the emission time and the number of times of emission of at least one of the light of the first and second colors during the set time according to the detected usage status. may

A lighting method according to the present disclosure comprises:
A light of a first color for causing a target mental state in a user of the space and a light of a second color for causing the user to have the mental state are selectively emitted. to control the lighting system and
The control of the lighting device includes:
The light of the first color is emitted for an emission time equal to or less than a first duration during which the psychological state is maintained by the light of the first color, and the light of the second color is used to maintain the psychological state. controlling the lighting device to emit light of the second color with an emission time of 2 or less durations.

Advantageous Effects of Invention According to the present disclosure, it is possible to sufficiently sustain the mental state caused by the user of the space due to the light emitted into the space.

FIG. 1 is a perspective view showing a lighting system according to this embodiment. FIG. 2 is a plan view showing the lighting system according to this embodiment. FIG. 3 is a cross-sectional view showing an example of a surface light source device included in the illumination system according to this embodiment. FIG. 4 is an enlarged sectional view showing an example of a surface light source device included in the illumination system according to this embodiment. FIG. 5 is a block diagram showing the lighting system according to this embodiment. FIG. 6 is a flowchart showing an operation example of the lighting system according to this embodiment. FIG. 7 is a flow chart showing an operation example of the lighting system according to the first modified example of this embodiment. FIG. 8 is a flowchart showing in detail a part of an operation example of the lighting system according to the first modified example of this embodiment. FIG. 9 is a schematic diagram showing an operation example of the lighting system according to the first modified example of the present embodiment. FIG. 10 is a flow chart showing an operation example of the lighting system according to the second modified example of this embodiment. FIG. 11 is a schematic diagram showing an operation example of the lighting system according to the second modified example of this embodiment. FIG. 12 is a flowchart showing an operation example of the lighting system according to the third modified example of this embodiment. FIG. 13 is a schematic diagram showing an operation example of the lighting system according to the third modified example of this embodiment. FIG. 14 is a block diagram showing a lighting system according to a fourth modified example of this embodiment. FIG. 15 is a flow chart showing an overview of an operation example of the lighting system according to the fourth modified example of this embodiment. FIG. 16 is a flow chart showing details of an operation example of the lighting system according to the fourth modified example of this embodiment. FIG. 17 is a flow chart showing an overview of an operation example of the lighting system according to the fifth modified example of this embodiment. FIG. 18 is a flow chart showing details of an operation example of the lighting system according to the fifth modified example of the present embodiment. FIG. 19 is a block diagram showing a lighting system according to a sixth modified example of this embodiment. FIG. 20 is a flow chart showing an operation example of the lighting system according to the sixth modification of the present embodiment. FIG. 21 is a flow chart showing an operation example of the lighting system according to the seventh modified example of this embodiment. FIG. 22 is an enlarged sectional view showing a surface light source device included in an illumination system according to an eighth modified example of this embodiment. FIG. 23 is an enlarged cross-sectional view showing a surface light source device included in a lighting system according to a ninth modification of this embodiment.

A lighting system and a lighting method according to the present embodiment will be described below with reference to the drawings. In the drawings attached to this specification, for the convenience of illustration and ease of understanding, the scale and the ratio of vertical and horizontal dimensions are changed and exaggerated from those of the real thing.

In addition, terms such as "parallel", "perpendicular", "identical", etc. that specify shapes and geometric conditions and their degrees used in this specification are not bound by a strict meaning, It is interpreted to include the extent to which similar functions can be expected.

Furthermore, the terms "sheet", "film" and "plate" are not to be distinguished from each other as used herein solely based on a difference in designation. For example, "plate" is a concept that includes members that can be called sheets and films.

In addition, in the drawings referred to in this embodiment and its modifications, the same reference numerals or similar reference numerals are given to the same portions or portions having similar functions, and repeated description thereof may be omitted.

(Lighting system 1)
1 to 23 are diagrams showing multiple examples of this embodiment. Among them, FIG. 1 is a perspective view showing an illumination system 1 according to this embodiment. Moreover, FIG. 2 is a plan view showing the lighting system 1 according to the present embodiment. The lighting system 1 according to the present embodiment can be used to produce the atmosphere of a space by emitting light into the space so as to create a desired psychological state for users of the space.

Specifically, the lighting system 1 according to the present embodiment illuminates and directs the space S in the room partitioned by the first to fourth walls W1 to W4, the ceiling CE, and the floor F, which are examples of the structure. can be used for The room illustrated in FIG. 2 is a rectangular room partitioned by four adjacent walls W1 to W4. A table T is installed in the center of the room. A doorway D is provided in the fourth wall W4. The lighting system 1 can also be effectively applied to rendering rooms other than rectangular.

The lighting system 1 includes a base lighting device 3 that irradiates a space S with illumination light, first to fourth surface light source devices 21 to 24 that are examples of lighting devices, and a control device 4 that is an example of a control unit. Prepare.
FIG. 3 is a sectional view showing an example of surface light source devices 21 to 24 included in the illumination system 1 according to this embodiment. As shown in FIG. 3, the surface light source devices 21 to 24 constitute a building material panel 20 included in the lighting system 1 together with the board 5, the decorative sheet 6, the auxiliary building material 7 and the fasteners 9. As shown in FIG. As shown in FIG. 1, the surface light source devices 21 to 24 are hidden from the space S by the decorative sheet 6 so that the user of the space S cannot directly see them. However, the decorative sheet 6 is not an essential component for the present disclosure, and can be removed if necessary.

(Surface light source devices 21 to 24)
The surface light source devices 21 to 24 will be described in detail below. The first surface light source device 21 is provided on the first wall W1 and emits light into the space S. As shown in FIG. 1, the first surface light source device 21 is provided at a position on the upper end side of a first wall W1 extending upward d11 in the vertical direction d1 from the floor F. As shown in FIG. The position of the first surface light source device 21 is such that, for example, a user seated at the seating position P1 of the table T shown in FIG. It is a position where the line of sight does not enter the field of vision when the line of sight is directed downward, but is within the field of vision when the line of sight is directed upward from the horizontal direction.

The second surface light source device 22 is provided on the second wall W2 and emits light into the space S. As shown in FIG. 1, the second surface light source device 22 is provided at a position on the upper end side of a second wall W2 extending upward d11 in the vertical direction d1 from the floor F. As shown in FIG. The position of the second surface light source device 22 is such that, for example, a user seated at the seating position P2 of the table T shown in FIG. It is a position where it does not enter the field of vision at times, but does enter the field of vision when the line of sight is directed upward from the horizontal direction.

The third surface light source device 23 is provided on the third wall W3 and emits light into the space S. As shown in FIG. 1, the third surface light source device 23 is provided at a position on the upper end side of a third wall W3 extending upward d11 in the vertical direction d1 from the floor F. As shown in FIG. The position of the third surface light source device 23 is such that, for example, when the users seated at the seating positions P1 and P2 turn their eyes toward the front, the third surface light source device 23 does not enter the field of view and is located in front of the third wall W3. This is the position where the line of sight enters the field of view when the line of sight is directed upward from the horizontal direction.

The fourth surface light source device 24 is provided on the fourth wall W4 and emits light into the space S. The fourth surface light source device 24 is provided at a position on the upper end side of the fourth wall W4 extending upward d11 in the vertical direction d1 from the floor F. As shown in FIG. The position of the fourth surface light source device 24 is such that, for example, when the users seated at the seating positions P1 and P2 turn their eyes toward the front, the fourth surface light source device 24 is out of sight and behind the fourth wall W4. This is the position where the line of sight enters the field of view when the line of sight is directed upward from the horizontal direction.

Arranged in such a position, the surface light source devices 21 to 24 are arranged so that when the user looks to the front for a meeting or looks to the user's hand to look at materials or a PC. When the user concentrates, the space can be effectively produced while ensuring seclusion of the surface light source devices 21 to 24 so as not to disturb the concentration, and when the user does not concentrate when the line of sight is directed upward. , the presentation effect of the surface light source devices 21 to 24 can be further enhanced.

However, the arrangement positions of the surface light source devices 21 to 24 are not limited to the example shown in FIG. For example, the surface light source devices 21 to 24 may be provided at positions on the lower end side of the walls W1 to W4, or may be provided at positions on the central side of the walls W1 to W2 in the vertical direction d1.

As shown in FIG. 3, the surface light source devices 21 to 24 each have a light emitting surface 210a and an optical member 210 that converts light emitted from a light emitter 220, which is an example of a light source, into planar light. Even if the amount of light emitted from a certain position on the light emitting surface 210a is less than the amount of light emitted from another position on the light emitting surface 210a located above the position d11 in the vertical direction d1 along the light emitting surface 210a. good. By doing so, the atmosphere of the space S can be effectively enhanced. In particular, by reducing the light emission amount at the edge portion of the lower side d12 in the vertical direction d1 of the light emitting surface 210a, the seam of light between the light emitting surface 210a and the area outside the light emitting surface 210a can be made inconspicuous. . This makes it possible to enhance the atmosphere of the space S more effectively.

More specifically, the surface light source devices 21 to 24 have a decorative sheet 6 forming a decorative surface that is the frontmost surface of the building material panel 20 . The decorative sheet 6 includes a light emitting area Z1 facing the light emitting surface 210a of the optical member 210 and a non-light emitting area Z2 adjacent to the light emitting area Z1. In this way, separately from the base lighting device 3 mainly aimed at improving the brightness of the space S, the surface light source devices 21 to 24 transmit and illuminate the decorative sheet 6, thereby expanding the limited space S. can be granted. In particular, the light-emitting region Z1 of the decorative sheet 6 is limited to a limited range, and the light-emitting surface 210a of the optical member 210 is concealed by the decorative sheet 6, so that the joint of the light on the decorative sheet 6, that is, the light-emitting region Z1 and the non-light-emitting region Z1. The seam with the region Z2 is less conspicuous than the seam between the light emitting surface 210a and its outer region when the light emitting surface 210a is exposed. With this device, the space S can be produced in a state in which the presence of the light source is effectively diluted, and thereby the atmosphere of the space S can be enhanced more effectively.

The surface light source devices 21 to 24 have the decorative sheet 6 and the optical member 210 as main components, as described above. In the illustrated specific example, the surface light source devices 21 to 24 are formed in a plate shape as a whole, and a building material panel 20 is constituted by a part or the whole thereof. As shown in FIG. 3, the building material panel 20 may function as an inner wall material of the room while being superimposed on the walls W1 to W4. In such an example, all or part of the components of the building material panel 20 may be treated as an assembly kit for manufacturing the building material panel 20 and distributed or sold. Alternatively, the building material panel 20 alone may form the inner wall of the room.

In one specific example shown in FIG. 3, building material panel 20 includes auxiliary building material 7, fasteners 9, and board 5 in addition to decorative sheet 6 and optical member 210. As shown in FIG.

The decorative sheet 6 is exposed in the space S as shown in FIGS. The decorative sheet 6 forms the surfaces of the surface light source devices 21 to 24 on the most light emitting side. As the decorative sheet 6, wallpaper for buildings, interior materials for floors and ceilings, interior materials for moving bodies such as vehicles, and members forming the outermost surfaces of furniture, electrical equipment, and the like can be used.

As described above, the decorative sheet 6 includes the light emitting area Z1 facing the light emitting surface 210a of the optical member 210 and the non-light emitting area Z2 offset from the position facing the light emitting surface 210a. The non-light-emitting region Z2 is adjacent to the light-emitting region Z1. The decorative sheet 6 is irradiated with light from the rear side by the optical member 210 in the light emitting region Z1. The decorative sheet 6 has visible light transmittance at least in the light emitting region Z1. Therefore, at least part of the light emitted from the light emitting surface 210a of the optical member 210 can pass through the light emitting area Z1 of the decorative sheet 6. FIG. Since the decorative sheet 6 is illuminated with transmitted light in this manner, a white wallpaper having a relatively high transmittance is suitably used as the decorative sheet 6 . However, wallpaper with a relatively low transmittance, such as wood grain wallpaper, can be sufficiently effectively transilluminated to achieve the effects described later, and the pattern of the decorative sheet 6 is not particularly limited. The visible light transmittance in the light emitting region Z1 of the decorative sheet 6 is preferably 1.0% or more, more preferably 10% or more. Visible light transmittance is measured using an infrared-visible-ultraviolet spectrophotometer (UV3100PC manufactured by Shimadzu Corporation) in accordance with JIS A5759-2008 in the wavelength range of 380 nm or more and 780 nm or less, and specified in the same standard. It is calculated by the calculation formula.

As shown in FIG. 3, the light-emitting regions Z1 and the non-light-emitting regions Z2 are arranged in the vertical direction d1. The light-emitting region Z1 is positioned on the upper d11 side in the vertical direction d1, and the non-light-emitting region Z2 is positioned on the lower D12 side in the vertical direction d1.

From the viewpoint of expecting the effect of improving the atmosphere of the space by the surface light source devices 21 to 24, it is preferable to make the boundary between the light emitting area Z1 and the non-light emitting area Z2 of the decorative sheet 6 inconspicuous. From this point, it is preferable that the decorative sheet 6 has the same configuration in the light-emitting region Z1 and the non-light-emitting region Z2.

As shown in FIG. 3, the board 5 is a plate-like member. The board 5 is arranged so as to face at least the non-light emitting area Z2 of the decorative sheet 6 . The decorative sheet 6 may be attached to the board 5 . In this case, the board 5 can stably support the decorative sheet 6 .

In the example shown in FIG. 3, the board 5 is arranged facing both the non-light emitting area Z2 and the light emitting area Z1. This board 5 is provided with a concave portion 51 at a position facing the light emitting region Z1. An optical member 210 is accommodated within the recess 51 of the board 5 . According to the example of FIG. 3, the board 5 can stably support the optical member 210 . The fastener 9 is provided on the board 5 and fixes the optical member 210 on the board 5 . Further, in addition to or instead of the fastener 9, the board 5 and the optical member 210 may be fixed by a bonding layer containing an adhesive, a pressure-sensitive adhesive, or the like.

The light-emitting surface 210a of the optical member 210 is preferably located on the same plane as the surface 5a of the board 5 facing the non-light-emitting region Z2 of the decorative sheet 6. As shown in FIG. The decorative sheet 6 is laminated on the board 5 and the optical member 210 positioned in this way. In this case, a step is less likely to be formed between the surface 5a of the board 5 and the light emitting surface 210a of the optical member 210, and the deterioration of the design of the decorative sheet 6 due to the step being visually recognized through the decorative sheet 6 is prevented. can be effectively suppressed. Furthermore, the presence of the optical member 210 can be effectively made inconspicuous when the surface light source devices 21 to 24 emit light, and the effect of enhancing the atmosphere of the space S by the surface light source devices 21 to 24 can be more significantly exhibited. become.

The board 5 is determined according to the application of the decorative sheet 6 . When the decorative sheet 6 is a member that decorates the surface of walls, floors, ceilings, etc., the board 5 may be made of wood such as veneer, plywood, laminated wood, particle board, fiber board, etc. It can be an inorganic non-metallic plate made of a plate material, cement-based material such as concrete or mortar, a gypsum board, calcium silicate or the like, or a metal plate made of iron, aluminum or the like. When the decorative sheet 6 serves as an interior material for a moving object such as a vehicle, the board 5 is, for example, a resin plate material or a metal plate. When the decorative sheet 6 is used for furniture or electrical appliances, the board 5 is made of, for example, a wooden board or a resin board. In applying the surface light source devices 21 to 24 to the building material panel 3, the board 5 preferably has flame resistance and fire resistance.

3, along with the illustration of the fastener 9, the decorative sheet 6 is shown with a gap between it and the board 5 and the optical member 210. As shown in FIG. However, they may be attached to the board 5 and the optical member 210 without leaving a gap.

The auxiliary building material 7 is a member provided at the interface between the ceiling CE and the walls W1 to W4. The auxiliary building material 7 covers the joints between the ceiling CE and the walls W1 to W4 to improve the design of the building material panel 20. FIG. As the auxiliary building material 7, members called "circumference" or "baseboard" can be used. However, it is also possible to omit the auxiliary building material 7 .

As shown in FIG. 3, the optical member 210 has a light emitting surface 210a that emits planar light. The optical member 210 is positioned such that its light emitting surface 210a faces only a portion of the decorative sheet 6. As shown in FIG.

Specific examples of the surface light source devices 21 to 24 will now be described. FIG. 4 is an enlarged cross-sectional view showing an example of the surface light source devices 21 to 24 included in the illumination system 1 according to this embodiment. The surface light source devices 21 to 24 shown in FIG. 4 are configured as edge light type surface light source devices 21 to 24 . The surface light source devices 21 to 24 have light emitters 220 and optical members 210 . The optical member 210 has a light diffusion sheet 212 , a reflection sheet 213 and a light guide plate 211 . The surface light source devices 21 to 24 may be, for example, a surface light source device using a direct type LED, a surface light source device using an EL (Electro Luminescence) sheet, or the like. It may be configured by a combination with a surface light source device.

Light emitter 220 emits light. A specific aspect of the light emitter 220 is not particularly limited, and various members that emit light can be widely used. Specifically, for example, a cold cathode tube, a point-like full-color light emitting diode (LED), an incandescent light bulb, a laser oscillation device, or the like can be used as the light emitter 220 . In the example shown in FIG. 3 the light emitter 220 is held by the auxiliary building material 7 . A plurality of light emitters 220 are arranged at intervals along the horizontal direction d2 shown in FIG. If the auxiliary building material 7 is removable, the plurality of light emitters 220 can be removed from the walls W1 to W4 together with the auxiliary building material 7, and part or all of the plurality of light emitters 220 can be replaced.

It is known that the color of the illumination light emitted from the illumination system 1 affects the psychological state of humans. For example, when the space S is illuminated with bright green illumination light or reddish purple illumination light, it is said that the user H of the space S is made lively. Similarly, when mauve-colored illumination light or iris-colored illumination light is used, it is said to have the effect of relieving drowsiness from the user. In addition, it is said that the use of skin-colored illumination light has the effect of causing the user to concentrate. Further, when lemon-colored illumination light or skin-colored illumination light is used, it is said that there is an effect of imparting comfort to the user and making the user feel relaxed. The illumination system 1 is intended to positively affect the psychological state of the user with such illumination light and to effectively influence the psychological state of the user.

In the illustrated example, light emitted from each of the light emitters 220 of the surface light source devices 21 to 24 becomes the illumination light. Therefore, in order to bring about a desired mental state in the user, each light emitter 220 is capable of selecting the color of light so as to emit light in a wavelength range corresponding to the desired mental state. As an example, each light emitter 220 is a plurality of types of light emitters 220 capable of emitting light in different wavelength ranges. In this case, by adjusting the output of each light emitter 220, it is possible to perform illumination with various colors of illumination light through additive color mixture. Typically, the surface light source devices 21 to 24 include a light emitter capable of emitting red light, a light emitter capable of emitting green light, and a light emitter capable of emitting blue light. , the color of the illumination light can be selected from the entire range of colors on the chromaticity diagram.

The light guide plate 211 is a plate-like member having a pair of main surfaces 211a and 211b and side surfaces positioned between the pair of main surfaces 211a and 211b. One main surface forms the light output surface 211a, and the other main surface forms the back surface 211b. The main surfaces 211a and 211b are typically rectangular in plan view. The main surfaces 211a and 211b have a pair of side edges extending along the vertical direction d1 and a pair of side edges extending along the horizontal direction d2 orthogonal to the vertical direction d1.

As shown in FIG. 4, the light guide plate 211 has a light incident surface 211d located on the upper end side in the vertical direction d1. 211 d of light-incidence surfaces are extended in the horizontal direction d2 so that the auxiliary|assistant building material 7 may be followed. The light incident surface 211 d faces the light emitter 220 held by the auxiliary building material 7 . The plurality of light emitters 220 are arranged at intervals along the horizontal direction d2, which is the longitudinal direction of the light incident surface 211d.

As shown in FIG. 4 , light emitted from the light emitter 220 enters the light guide plate 211 and travels through the light guide plate 211 . A main surface 211b of the light guide plate 211 is provided with a concave portion 211c functioning as an extraction element. The concave portion 211c changes the traveling directions of the lights L1 and L2 traveling through the light guide plate 211 . The light emitted from the light emitter 220 enters the light guide plate 211 from the light incident surface 211d and travels through the light guide plate 211 through reflection, especially total reflection. The lights L1 and L2 traveling through the light guide plate 211 are incident on the pair of main surfaces 211a and 211b of the light guide plate 211 at an incident angle less than the critical angle for total reflection by changing the direction of travel, particularly by scattering. As a result, the light can be emitted from the light guide plate 211 .

The light whose traveling direction has been changed by the concave portion 211c is emitted from the light guide plate 211 through one of the pair of main surfaces 211a and 211b. A light diffusion sheet 212 is provided facing the light exit surface 211 a of the light guide plate 211 . Lights L 1 and L 2 emitted from the light exit surface 211 a of the light guide plate 211 then enter the light diffusion sheet 212 . The light diffusing sheet 212 has a light diffusing function, and can adjust the luminance angular distribution caused by the transmitted light. The light diffusion sheet 212 forms the light emitting surface 210a of the optical member 210. As shown in FIG. The light diffused by the light diffusion sheet 212 is emitted from the optical member 210 toward the decorative sheet 6. - 特許庁The light diffusion sheet 212 can employ various configurations capable of exhibiting a light diffusion function. The diffusion characteristics of the light diffusion sheet 212 may be isotropic or anisotropic.

A reflective sheet 213 is provided facing the rear surface 211 b of the light guide plate 211 . The reflective sheet 213 can reflect the light emitted from the back surface 211 b and direct it toward the light guide plate 211 and the light diffusion sheet 212 . By providing the reflection sheet 213, the amount of light emitted from the light emitting surface 210a of the optical member 210 can be increased. Thereby, the utilization efficiency of the light emitted from the light emitter 220 can be improved. Various configurations capable of exhibiting a light reflecting function can be employed for the reflective sheet 213 . The reflection characteristic of the reflection sheet 213 may be specular reflection or diffuse reflection. The diffuse reflection characteristics of the reflective sheet 213 may be isotropic or anisotropic.

(Base lighting device 3)
Next, the base lighting device 3 will be described. As shown in FIGS. 1 and 3, the base lighting device 3 is attached to the ceiling CE and emits illumination light Lx into the space S from above. The base lighting device 3 may be fixed to the ceiling CE or suspended from the ceiling CE. The base lighting device 3 assists in grasping the inside of the space S through human vision. Therefore, as the base lighting device 3, a general indoor lighting fixture can be used.
Although the illumination light Lx emitted from the base illumination device 3 is not particularly limited, natural illumination can be achieved by using white.

(control device 4)
Next, the control device 4 will be explained. FIG. 5 is a block diagram showing the illumination system 1 according to this embodiment. The control device 4 is a device that controls the emission of light from the surface light source devices 21-24.

In the examples of FIGS. 3 and 5, the control device 4 is electrically connected to the light emitters 220 of the surface light source devices 21-24. The control device 4 controls the light emitting operation of the light emitter 220 by controlling power supplied to the light emitter 220 from a power supply (not shown). By controlling the light emitting operation of the light emitter 220, the control device 4 controls the emission of light from the surface light source devices 21-24. Specifically, the control device 4 controls at least one of the color and emission time of the light emitted from the surface light source device 21 into the space S.

More specifically, the control device 4 controls the light of the first color for causing the user of the space to enter the target state of mind and the light of the first color for causing the user of the space to enter the target state of mind. The surface light source devices 21 to 24 are controlled to selectively emit light of the second color. Hereinafter, the target mental state is also called a target mental state.

The light of the first color and the light of the second color are set in advance in the control device 4 in association with the desired state of mind. For example, when the target state of mind is "lively", the light of the first color may be bright green light, and the light of the second color may be reddish purple light. Further, when the target state of mind is "improved drowsiness", the light of the first color may be mauve light, and the light of the second color may be iris light.

The light of the second color is not limited to light of one color, and may be light of two or more different colors. That is, the control device 4 may perform control to selectively emit light of three or more colors for producing the desired state of mind.

The control device 4 emits the light of the first color for an emission time equal to or shorter than the first duration for which the target state of mind is maintained by the light of the first color, and the light of the second color is used to maintain the target state of mind. The surface light source devices 21 to 24 are controlled so as to emit light of the second color for an emission time equal to or shorter than the second duration.

The first duration is a known preset time associated with the target state of mind and the first color of light. The first duration may be the time required for a viewer's chromatic adaptation to light of the first color. The second duration is a known preset time associated with the target state of mind and the second color of light. The second duration may be the time required for a viewer's chromatic adaptation to light of the second color.

The specific aspect of the control device 4 is not particularly limited as long as it can control the emission of light from the surface light source devices 21 to 24 . As an example, the control device 4 shown in FIG. 5 has a storage section 41 , a calculation section 42 and an injection control section 43 . The storage unit 41 stores information used by the control device 4 to control emission of light from the surface light source devices 21 to 24 . For example, the storage unit 41 stores a target mental state, a first color and a first duration corresponding to the target mental state, and a second color and a second duration corresponding to the target mental state. may have been Based on the information stored in the storage unit 41, the calculation unit 42 creates a program for controlling light emission by the surface light source devices 21-24. Note that the calculation unit 42 may create a program by updating a part of the default program. The emission control unit 43 executes the program created by the calculation unit 41 to control emission of light from the surface light source devices 21 to 24 .

The control device 4 is, for example, incorporated in an electric circuit that supplies power from a power source to the light emitting body 220, a control circuit that controls the operation of circuit elements of the electric circuit, and a storage device that stores data used for processing of the control circuit. It consists of hardware such as At least part of the control device 4 may be configured by software.

The control device 4 may be wholly provided outside the building material panel 20 , or at least part of it may be provided inside the building material panel 20 . Moreover, the control device 4 may be capable of cooperating with other components by communication through a network between some components thereof. In addition, the control device 4 may have a part of its constituent parts on a device capable of communicating with other constituent parts through an external network, for example, on a cloud server or database.

(Lighting method)
An example of a lighting method using the lighting system 1 will be described below with reference to FIG.
FIG. 6 is a flowchart showing an operation example of the lighting system 1 according to this embodiment. The flow chart of FIG. 6 is repeated as necessary.

First, as shown in FIG. 6, the control device 4 controls the surface light source devices 21 to 24 to emit light of a first color (step S1).

After the emission of the light of the first color is started by controlling the surface light source devices 21 to 24, the control device 4 determines that the emission time of the light of the first color has reached the first duration from the start of emission. It is determined whether or not (step S2). This determination may be made using, for example, the timer function of the control device 4, but is not limited to this.

When the emission time of the light of the first color reaches the first duration (step S2: Yes), the control device 4 terminates the emission of the light of the first color and then emits the light of the second color. , the surface light source devices 21 to 24 are controlled so as to emit the light of (step S3).

On the other hand, if the emission time of the light of the first color has not reached the first duration (step S2: No), the control device 4 continues the emission of the light of the first color and The determination of whether or not the light emission time has reached the first duration is repeated (step S2).

After the emission of the light of the second color is started by controlling the surface light source devices 21 to 24, the control device 4 determines that the emission time of the light of the second color has reached the second duration from the start of emission. It is determined whether or not (step S4).

If the emission time of the light of the second color reaches the second duration (step S4: Yes), the control device 4 terminates the process.

On the other hand, if the emission time of the light of the second color has not reached the second duration (step S4: No), the control device 4 continues the emission of the light of the second color and of the light has reached the second duration (step S4).

As described above, in the present embodiment, the control device 4 emits the light of the first color for an emission time equal to or less than the first duration during which the target state of mind is sustained by the light of the first color. The surface light source devices 21 to 24 are controlled so as to emit light of the second color for an emission time equal to or shorter than the second duration during which the target state of mind is sustained by the light of the two colors. Thus, before the user's chromatic adaptation occurs to the light irradiated into the space in order to cause the user of the space to generate the target mental state, the light of a different color that causes the target mental state can be emitted. can be done. As a result, the psychological state caused by the light emitted into the space can be sufficiently maintained in the user of the space.

(First modification)
Next, a first modification will be described in which an ejection time equal to or less than the duration is assigned to the set time. Since the basic configuration of the lighting system 1 of the first modified example is the same as that of FIGS. 1 to 5, the first modified example will be described using the reference numerals in FIGS.

In a first variant, the control device 4 emits light of the first color with an emission time equal to or less than a first duration and with an emission time equal to or less than a second duration at a preset set time. The surface light source devices 21 to 24 are controlled to emit light of the second color.

The set time is part or all of the time that the user uses the space S, and is the time that is set with the intention of causing the user to reach the desired state of mind. The set time is stored in the storage unit 41 of the control device 4, for example.

For example, if the first duration is less than the second duration, controller 4 will only emit light of the first color at the set time if the set time is less than the first duration. The surface light source devices 21 to 24 may be controlled so as to emit light for an emission time shorter than the duration of . Alternatively, the control device 4 may control the surface light source devices 21 to 24 so as to emit only the light of the second color during the set time for an emission time shorter than the second duration. Thereby, the target state of mind can be maintained for a set period of time shorter than the first duration without the need to switch the color of the light.

In addition, when the set time is equal to or longer than the first duration and is less than the total time of the first duration and the second duration, the control device 4 sets the color of the first color in the set time. The surface light source devices 21-24 may be controlled to emit light for a first duration and to emit light of a second color for an emission time less than the second duration. Alternatively, the control device 4 controls the surface light source to emit light of the first color for an emission time shorter than the first duration and to emit light of the second color for a second duration at the set time. Devices 21-24 may be controlled. Thus, by switching between the light of the first color and the light of the second color with a minimum number of switching times for a set time period that is less than the sum of the first duration time and the second duration time, the target You can maintain your mental state.

In addition, when the set time is equal to or greater than the total time of the first duration and the second duration, the control device 4 may calculate the number of total times that can be allocated within the set time. good.
Then, the control device 4 controls the surface light source devices 21 to 24 to emit the light of the first color and the light of the second color with the number of times of emission and the emission time corresponding to the calculated number of total times. may Thereby, the light is emitted so as to minimize the number of times of switching between the light of the first color and the light of the second color in the set time equal to or longer than the total time of the first duration and the second duration. Color, number of shots and shot time can be assigned.

An operation example of the lighting system 1 of the first modified example of the present embodiment configured as described above will be described below with reference to FIGS. 7 to 9. FIG. FIG. 7 is a flowchart showing an operation example of the lighting system 1 according to the first modified example of this embodiment. FIG. 8 is a flowchart showing in detail a part of an operation example of the lighting system 1 according to the first modified example of this embodiment. FIG. 9 is a schematic diagram showing an operation example of the lighting system 1 according to the first modified example of the present embodiment. The flow chart of FIG. 7 is repeated as necessary.

First, as shown in FIG. 7, the control device 4 sets the color of light to be emitted during the set time T, the emission time, and the number of times of emission (step S5).

Specifically, as shown in FIG. 8, the control device 4 first determines whether or not the set time T is less than the first duration t1 (step S51).

If the set time T is less than the first duration t1 (step S51: Yes), the controller 4 instructs the controller 4 to emit the light of the first color once with an emission time of less than the first duration t1. Set (step S52).

On the other hand, if the set time T is not less than the first duration t1 (step S51: No), the control device 4 determines that the set time T is less than the total time t1+t2 of the first duration t1 and the second duration t2. (step S53).

When the set time T is less than the total time t1+t2 (step S53: Yes), the control device 4 sets to emit the light of the first color once in the first duration t1, and sets the second It is set to emit the color light once with an emission time less than the second duration t2 (step S54).

On the other hand, if the set time T is not less than the total time t1+t2 (step S53: No), the control device 4 calculates how many total times t1+t2 can be allocated within the set time T (step S55). Note that the calculation of the number of total times t1+t2 that can be allocated within the set time T may be performed at the beginning of step S5. In that case, step S51 may be executed when the number of calculated total times t1+t2 is zero.

After calculating the number of total times t1+t2 that can be allocated within the set time T, the control device 4 sets the injection time and the number of injections according to the calculated number (step S56). For example, if two total times t1+t2 can be allocated within the set time T, the controller 4 emits light of the first color twice with the first duration t1, as shown in FIG. , emitting light of the second color twice with a second duration t2, and switching between emitting light of the first color and emitting light of the second color three times.

After setting the color of the light to be emitted at the set time T, the emission time, and the number of times of emission as described above, as shown in FIG. It is determined whether or not to emit light of color 1 (step S6).

If the light of the first color is to be emitted (step S6: Yes), the control device 4 controls the surface light source devices 21 to 24 to emit the light of the first color (step S1).

After the emission of the light of the first color is started under the control of the surface light source devices 21 to 24, the control device 4 sets the emission time of the light of the first color to be equal to or less than the first duration t1. It is determined whether or not the time has reached (step S21).

When the emission time of the light of the first color reaches the set emission time (step S21: Yes), or when the light of the first color is not emitted (step S6: No), the control device 4 Based on the setting information, it is determined whether or not to emit light of the second color (step S7).

On the other hand, when the emission time of the light of the first color has not reached the set emission time (step S21: No), the control device 4 continues the emission of the light of the first color while continuing to emit the light of the first color. (step S21).

If the light of the second color is to be emitted (step S7: Yes), the control device 4 terminates the emission of the light of the first color and then causes the surface light source to emit the light of the second color. The devices 21 to 24 are controlled (step S3).

After the emission of the light of the second color is started by the control of the surface light source devices 21 to 24, the control device 4 sets the emission time of the light of the second color to the second duration t2 or less. It is determined whether or not the time has reached (step S41).

When the emission time of the light of the second color reaches the set emission time (step S41: Yes), or when the light of the second color is not emitted (step S7: No), the control device 4 It is determined whether or not the set time T has been reached (step S8).

When the set time T is reached (step S8: Yes), the control device 4 terminates the light emission control.

On the other hand, if the set time T has not been reached (step S8: No), the control device 4 proceeds to determine whether or not to emit light of the first color (step S6). At this time, if the number of times the light of the first color is emitted is set to 2 or more, the determination result in step S6 is affirmative: Yes.

As described above, in the first modification, the control device 4 emits light of the first color with an emission time equal to or shorter than the first duration, and emits light of the first color for a duration equal to or shorter than the first duration, and The surface light source devices 21 to 24 are controlled so as to emit light of the second color with an emission time shorter than the time. As a result, the psychological state caused by the light emitted into the space can be sufficiently maintained for the required time.

(Second modification)
Next, a second modification will be described in which a switching time is provided between the emission of the light of the first color and the emission of the light of the second color. Since the basic configuration of the lighting system 1 of the second modification is the same as that of FIGS. 1 to 5, the second modification will be described using the reference numerals of FIGS. 1 to 5. FIG.

In a second modification, the control device 4 controls the surface light source device 21 to switch from one of the emission of the light of the first color and the emission of the light of the second color to the other over a preset switching time. ∼24.

An operation example of the lighting system 1 of the second modified example of the present embodiment configured as described above will be described below with reference to FIGS. 10 and 11. FIG. FIG. 10 is a flow chart showing an operation example of the lighting system 1 according to the second modified example of this embodiment. FIG. 11 is a schematic diagram showing an operation example of the illumination system 1 according to the second modified example of this embodiment. The flowchart of FIG. 10 is repeated as necessary.

The flowchart of FIG. 10 has steps S9, S10 and S11 added to the flowchart of FIG.

Specifically, when the light of the first color is to be emitted (step S6: Yes), the control device 4 determines whether or not the light of the first color is emitted for the second time or later in the set time. (Step S9).

If the emission of the light of the first color is the second time or later (step S9: Yes), the control device 4 waits for the switching time ts before emission of the light of the first color (step S10), and after waiting, The surface light source devices 21 to 24 are controlled to emit light of the first color (step S1).

On the other hand, if the emission of the light of the first color is not the second time or later (step S9: No), the control device 4 controls the surface light source devices 21 to 24 to emit the light of the first color (step S1).

In addition, when the control device 4 emits the light of the second color (step S7: Yes), it waits for the switching time ts before emitting the light of the second color (step S11). The surface light source devices 21 to 24 are controlled so as to emit colored light (step S3).

As shown in FIG. 11, when setting the setting information (step S5), the control device 4 sets the switching time ts together with the emission time of the light of the first color and the emission time of the light of the second color. may In this case, the control device 4 calculates the number of total times t1+ts+t2 of the first duration t1, the switching time ts, and the second duration t2 that can be allocated during the set time T, and The injection time and number of injections may be set accordingly.

As described above, in the second modification, the control device 4 switches from one of the first color light emission and the second color light emission to the other over a preset switching time. The surface light source devices 21 to 24 are controlled as follows. As a result, it is possible to suppress the user's sense of discomfort due to the sudden change in the color of the light.

(Third modification)
Next, a third modification will be described in which light of a color close to both the first color and the second color is emitted at the switching time ts. Since the basic configuration of the lighting system 1 of the third modification is the same as that of FIGS. 1 to 5, the third modification will be described using the reference numerals of FIGS. 1 to 5. FIG.

In a third modification, the control device 4 causes the surface to emit light of a third color located on a straight line connecting the first color and the second color in the chromaticity diagram at the switching time ts. It controls the light source devices 21-24.

An operation example of the lighting system 1 according to the third modified example of the present embodiment configured in this way will be described below with reference to FIGS. 12 and 13. FIG. FIG. 12 is a flowchart showing an operation example of the lighting system 1 according to the third modified example of this embodiment. FIG. 13 is a schematic diagram showing an operation example of the lighting system according to the third modified example of this embodiment.

As shown in FIG. 12, the control device 4 waits for the switching time ts to emit light of the first color (step S10). First, as shown in FIG. The surface light source devices 21 to 24 are controlled so as to emit the light of the third color positioned on the straight line connecting the second color (step S101).

The third color may be a fixed color located on a straight line connecting the first color and the second color in the chromaticity diagram. Alternatively, the third color changes from the source color of the first and second colors to the destination color along a straight line connecting the first color and the second color as the switching time ts elapses. It may also be a variable color that gradually changes toward it.

After the emission of the third color light is started under the control of the control device 4, the control device 4 determines whether or not the switching time ts has elapsed since the start of standby (step S102).

If the switching time ts has passed (step S102: Yes), the control device 4 terminates the emission of the light of the third color and then causes the surface light source devices 21 to 21 to emit the light of the first color. 24 is controlled (step S1).

On the other hand, if the switching time ts has not elapsed (step S102: No), the control device 4 continues to emit light of the third color and repeats determination of whether or not the switching time ts has reached (step S102).

As described above, in the third modification, the control device 4 controls, at the switching time ts, the light of the third color positioned on the straight line connecting the first color and the second color in the chromaticity diagram. The surface light source devices 21 to 24 are controlled to emit the . As a result, compared to the second modified example, it is possible to more effectively suppress discomfort when switching between the light of the first color and the light of the second color.

(Fourth modification)
Next, a description will be given of a fourth modification in which it is possible to instruct to change the desired state of mind. FIG. 14 is a block diagram showing a lighting system 1 according to a fourth modified example of this embodiment.

As shown in FIG. 14, the illumination system 1 according to the fourth modification of the present embodiment further has an input device 8, which is an example of an input unit, in addition to the configuration of FIG.

The input device 8 inputs an instruction to change the desired state of mind to the control device 4 in accordance with a user's operation.

The control device 4 changes the target mental state and the color of the light for causing the target mental state in the user in accordance with the instruction to change the target mental state from the input device 8 . The control device 4 may also change the injection time and the number of injections.

The input device 8 may input an instruction to change the desired state of mind to the control device 4 by either a wired or wireless communication method. Further, the input device 8 may input an instruction to change the desired state of mind to the control device 4 by either key operation input or voice input. Further, the instruction to change the desired state of mind may be input at any timing during the period during which the light is emitted to cause the current desired state of mind. Also, the input device 8 may be configured by, for example, a personal computer or a smartphone.

An operation example of the lighting system 1 according to the third modified example of the present embodiment configured as described above will be described below with reference to FIGS. 15 and 16. FIG. FIG. 15 is a flow chart showing an outline of an operation example of the lighting system 1 according to the fourth modified example of this embodiment. FIG. 16 is a flow chart showing details of an operation example of the lighting system 1 according to the fourth modified example of the present embodiment.

First, the control device 4 determines whether or not an instruction to change the desired state of mind has been input by the input device 8 (step S12).

If no instruction to change the desired state of mind is input (step S12: No), the control device 4 controls the surface light source devices 21 to 24 to emit light for producing the current desired state of mind. (Step S13). This control is, for example, a continuation of execution of the flow chart shown in FIG.

On the other hand, if an instruction to change the desired state of mind is input (step S12: Yes), the control device 4 causes the surface light source devices 21 to 24 to emit light for producing the changed desired state of mind. control (step S14).

Here, the flowchart of FIG. 16 shows an example of light emission control (step S14) for producing the changed desired state of mind.

The flowchart of FIG. 16 is basically the same as the flowchart of FIG. It is different from FIG. 10 in that the target mental state is changed and processing is performed according to the changed target mental state.

That is, step S51 corresponds to step S5 in FIG. 10, and when the target mental state is changed, the first and second colors, the ejection time, and the number of shots are changed so as to correspond to the changed target mental state. This is the step of changing the settings. Step S61 corresponds to step S6 in FIG. 10, and is a step of determining whether or not to emit light of the first color after the change. Step S11 corresponds to step S1 in FIG. 10, and is a step of controlling the surface light source devices 21 to 24 so as to emit light of the first color after the change. Step S22 corresponds to step S21 in FIG. 10, and determines whether or not the changed emission time of the light of the first color has reached the set emission time equal to or less than the changed first duration. It is a process to do. Step S71 corresponds to step S7 in FIG. 10, and is a step of determining whether or not to emit light of the second color after the change. Step S31 corresponds to step S3 in FIG. 10, and is a step of controlling the surface light source devices 21 to 24 so as to emit light of the second color after the change. Step S42 corresponds to step S41 in FIG. 10, and determines whether or not the changed emission time of the light of the second color has reached the set emission time equal to or less than the changed second duration. It is a process to do.

As described above, in the fourth modification, the lighting system 1 further includes the input device 8 for inputting an instruction to change the desired state of mind to the control device 4. According to the instruction, the target state of mind and the color of the light for causing the target state of mind in the user are changed. Thereby, the target state of mind can be changed so as to meet the user's request.

(Fifth Modification)
Next, a description will be given of a fifth modification in which it is possible to instruct to change the set time. Since the basic configuration of the lighting system 1 of the fifth modified example is the same as that of FIG. 14, the fifth modified example will be described using the reference numerals in FIG.

In the fifth modification, the input device 8 inputs an instruction to change the set time to the control device 4 according to the user's operation. The control device 4 changes the set time and the emission time of at least one of the first and second lights in the set time in response to the instruction to change the set time. Instead of changing the emission time of at least one of the first and second lights, or in addition to changing the emission time of at least one of the first and second lights, the control device 4 changes the first and second The number of times of emission of at least one of the lights may be changed.

An operation example of the lighting system 1 according to the fifth modified example of the present embodiment configured as described above will be described below with reference to FIGS. 17 and 18. FIG. FIG. 17 is a flow chart showing an overview of an operation example of the lighting system 1 according to the fifth modified example of this embodiment. FIG. 18 is a flow chart showing details of an operation example of the lighting system 1 according to the fifth modification of the present embodiment.

First, the control device 4 determines whether or not an instruction to change the set time has been input by the input device 8 (step S15).

If no instruction to change the set time is input (step S15: No), the control device 4 controls the surface light source devices 21 to 24 to emit light during the current set time (step S16). This control is, for example, a continuation of execution of the flow chart shown in FIG.

On the other hand, when an instruction to change the set time of the mental state is input (step S15: Yes), the control device 4 controls the surface light source devices 21 to 24 to emit light at the set time after the change ( step S17).

Here, the flowchart of FIG. 18 shows an example of light emission control (step S17) at the set time after the change.

The flowchart of FIG. 18 is basically the same as the flowchart of FIG. Step S52) is different from step S5 in FIG.

As described above, in the fifth modification, the input device 8 inputs an instruction to change the set time to the control device 4, and the control device 4 responds to the instruction to change the set time. , changing the emission time and/or the number of times of emission of at least one of the light of the first and second colors at a set time. Thereby, the duration of the target mental state can be changed so as to meet the user's request.

(Sixth modification)
Next, a sixth modification will be described in which the setting of the state of mind is changed according to how the user uses the space. FIG. 19 is a block diagram showing a lighting system 1 according to a sixth modified example of this embodiment.

As shown in FIG. 19, the illumination system 1 according to the sixth modification of the present embodiment further has a sensor 9, which is an example of a detection section, in addition to the configuration of FIG.

A sensor 9 detects how the user uses the space. The control device 4 changes the target state of mind and the color of the light for causing the target state of mind in the user according to the usage state detected by the sensor 9 . Furthermore, the control device 4 may change the injection time and the number of injections.

The usage status of the space includes at least one of the appearance and biometric information of the user of the space. The sensor 9 may be either a contact sensor or a non-contact sensor. For example, the sensor 9 may be a camera that detects the appearance of the user and biometric information of the user such as body temperature and heart rate. In addition, as the sensor 9, a wearable device that detects the user's heart rate, blood pressure, brain waves, cerebral blood flow, etc., a sound collection microphone that detects the atmosphere of the space and the user's emotion from voice information, A headset-type sensitivity analyzer or the like that detects emotions from the user's electroencephalogram can be preferably applied. The sensor 9 may transmit detection information to the control device 4 by either wired or wireless communication method. Moreover, the sensor 9 may transmit the detection information directly to the control device 4 or may transmit it to the control device 4 via the input device 8 .

When the control device 4 determines that the detection information of the sensor 9 does not match the current target state of mind, the control device 4 changes the current target state of mind to the target state of mind according to the detection information. For example, the control device 4 determines that the detection information of the sensor 9 acquired during the light emission control for producing "liveliness" as the target mental state indicates, for example, an increase in heart rate equal to or greater than a threshold. When it is determined that the user is tired, the target state of mind may be changed to "reduce fatigue". In this case, the control device 4 may emit mauve light as the first color light and iris light as the second color light.

An operation example of the illumination system 1 according to the sixth modification of the present embodiment configured in this way will be described below with reference to FIG. 20 . FIG. 20 is a flow chart showing an operation example of the lighting system 1 according to the sixth modification of the present embodiment.

First, the control device 4 acquires detection information from the sensor 9 (step S18).

After acquiring the detection information, the control device 4 determines whether or not it is necessary to change the target state of mind based on the detection information (step S19).

If it is not necessary to change the target state of mind (step S19: No), the control device 4 controls the surface light source devices 21 to 24 to emit light for generating the current target state of mind (step S13 ). This control is, for example, a continuation of execution of the flow chart shown in FIG.

On the other hand, if it is necessary to change the desired state of mind (step S19: Yes), the control device 4 controls the surface light source devices 21 to 24 to emit light for producing the changed desired state of mind. (Step S14). This control is, for example, the execution of the flowchart shown in FIG.

As described above, in the sixth modification, the lighting system 1 further includes the sensor 9 that detects the usage status of the space by the user, and the control device 4 adjusts the target psychological state according to the detected usage status. Change the state and the color of the light to create the target mental state in the user. As a result, the target state of mind can be changed to suit the usage situation.

(Seventh Modification)
Next, a seventh modification will be described in which the set time is changed according to how the user uses the space. Since the basic configuration of the lighting system 1 of the seventh modified example is the same as that of FIG. 19, the seventh modified example will be described using the reference numerals in FIG.

In the seventh modified example, the control device 4 changes the set time and the emission time of at least one of the first and second lights in the set time according to the usage of the space detected by the sensor 9. . Instead of changing the emission time of at least one of the first and second lights, or in addition to changing the emission time of at least one of the first and second lights, the control device 4 changes the first and second The number of times of emission of at least one of the lights may be changed.

For example, if it is determined that the user has not left the room even after the set time has passed, the control device 4 extends the set time for a certain period of time based on the image of the camera, which is an example of the sensor 9. You may Also, when part of the usage time of the room is set as the set time for the meeting with the target state of mind as "lively", the set time has elapsed based on the camera image and voice input information. If it is determined that the conference is still ongoing, the set time may be extended to continue the light emission control to create liveliness.

An operation example of the illumination system 1 according to the seventh modified example of the present embodiment configured as described above will be described below with reference to FIG. 21 . FIG. 21 is a flow chart showing an operation example of the illumination system 1 according to the seventh modified example of this embodiment.

First, the control device 4 acquires detection information from the sensor 9 (step S18).

After obtaining the detection information, the control device 4 determines whether or not it is necessary to change the set time based on the detection information (step S20).

If the set time does not need to be changed (step S20: No), the control device 4 controls the surface light source devices 21 to 24 to emit light during the current set time (step S16). This control is, for example, a continuation of execution of the flow chart shown in FIG.

On the other hand, if the set time needs to be changed (step S20: Yes), the control device 4 controls the surface light source devices 21 to 24 so as to emit light at the changed set time (step S17). This control is, for example, the execution of the flowchart shown in FIG.

As described above, in the seventh modification, the control device 4 controls the setting time and at least one of the light of the first and second colors during the setting time according to the usage state detected by the sensor 9. Change the injection time and/or number of injections. This makes it possible to change the duration of the desired state of mind so as to suit the usage situation.

(Eighth modification)
In the example of FIG. 4, the concave portion 211c is exemplified as the extracting element of the light guide plate 211. As shown in FIG. As another example, the outcoupling element can be a light scattering layer 215 laminated to the light guide plate 211, as shown in FIG. The light scattering layer 215 has a support layer 215a functioning as a binder and light scattering elements 215b dispersed within the support layer 215a. The support layer 215a may be made of a resin having visible light transmittance. The light scattering element 215b has a function of changing the traveling direction of light traveling through the light scattering layer 215 by reflection, refraction, diffraction, or the like. The light scattering element 215b may have a refractive index different from that of the support layer 215a, or may be made of a material having light reflectivity such as metal. Specific examples of the light scattering element 215b include metal compounds, gas-containing porous substances, resin beads surrounding a metal compound, white fine particles, air bubbles, and particles with a different refractive index than the surroundings. In the example of FIG. 22, the lights L1 and L2 traveling through the light guide plate 211 can collide with the light scattering elements 215b in the light scattering layer 215 to change their traveling directions and then exit the light guide plate 211. becomes.

It is preferable that the refractive index of the support layer 215a of the light scattering layer 215 is equal to or higher than the refractive index of the light guide plate 211. FIG. When the refractive index of the support layer 215a of the light scattering layer 215 is lower than that of the light guide plate 211, the light L3 traveling through the light guide plate 211 is totally reflected at the interface between the light guide plate 211 and the light scattering layer 215. There is a possibility that the light cannot enter the light scattering layer 215 . After entering the light guide plate 211 from the light incident surface 211d, the light L3 travels through the light guide plate 211 to the opposite surface 211e. The presence of such light will reduce the energy efficiency of the light emitter 220 . By making the refractive index of the support layer 215a equal to or higher than the refractive index of the light guide plate 211, total reflection at the interface between the light guide plate 211 and the light scattering layer 215 is effectively prevented, and the light scattering layer 215 functions as an extraction element. can function more effectively.

(Ninth modification)
As yet another example, as shown in FIG. 23, light scattering elements 215b functioning as outcoupling elements may be dispersed within the light guide plate main body 65. FIG. In the light guide plate 211 shown in FIG. 23, the light L traveling through the light guide plate 211 collides with the light scattering elements 215b, is scattered, and can be emitted from the light guide plate 211. FIG. The light scattering element 215b can be configured similarly to the light scattering element 215b described above.

Also, the light guide plate 211 may include multiple types of extraction elements. In the example shown in FIG. 23, the light guide plate 211 contains light scattering elements 215b and also has recesses 211c.

Furthermore, the light scattering power caused by the concave portions 211c in each region of the light guide plate 211 may not be constant and may be different. That is, the light scattering power of the light guide plate 211 may be changed in each region along the plate surface. In other words, the light scattering power in a certain region of the light guide plate 211 may be different from the light scattering power in other regions shifted from the region along the plate surface. By changing the light scattering power in each region along the panel surface of the light guide plate 211, it is possible to adjust the amount of light emitted from each region.

The light scattering ability is the strength of the light guide plate 211's ability to scatter light passing through it. The degree of light scattering ability can be evaluated, for example, by using the haze value [%] measured according to JIS-K7361-1, and the higher the haze value [%], the higher the light scattering ability. It will be. Therefore, in the illustrated example, the transmission haze value of light transmitted in the normal direction to the plate surface of the light guide plate 211 is not constant in each region of the light guide plate 211, but has different values.
The haze value [%] can be measured by a method based on JIS K7136 using a haze meter (manufactured by Murakami Color Research Laboratory, product number: HM-150).

In addition, the lighting system 1 of the present disclosure can be applied not only to rooms in buildings, but also to presentation of spaces in rooms of mobile objects such as cabins and cabins of ships.

Although specific examples and modified examples of one embodiment have been described above, it is of course possible to appropriately combine and apply a plurality of examples.

While several embodiments of the disclosure have been described, these embodiments are provided by way of example and are not intended to limit the scope of the disclosure. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof fall within the scope and gist of the present disclosure, as well as within the scope of the present disclosure described in the claims and equivalents thereof.

1 lighting system 21 first surface light source device 22 second surface light source device 23 third surface light source device 24 fourth surface light source device 4 control device

Claims (8)

Skylight of a first color for producing a target psychological state in a user between;targeta light of a second color for producing a psychological state; andin light ofControl light equipmentdeath,
Saidof the lighting systemsystemyou,
detecting the usage status of the space by the user by a detection unit;
Judging whether or not it is necessary to change the current target psychological state according to the detected usage status,
If it is determined that the above change is unnecessary, the current said light of a first colorcurrent targetpersistent psychological statecurrentwith an injection time less than or equal to the first durationcurrentemitting light of a first color,currentsaid light of a second colorcurrent targetpersistent psychological statecurrentat an injection time less than or equal to the second durationcurrentcontrolling the lighting device to emit light of a second colordeath,
When the change is determined to be necessary, the light of the changed first color has an emission time of the changed first duration or less in which the changed target state of mind persists. The light of one color is emitted, and the light of the second color after the change is emitted for an emission time equal to or less than the second duration after the change during which the target psychological state after the change is maintained. controlling said lighting device to emit light of a color of ,illuminationMethod. 2. The lighting method of claim 1, wherein the modified emission time of the first duration or less is different from the current emission time of the first duration or less. 3. The lighting method according to claim 1 or 2, wherein the modified emission time of the second duration or less is different from the current emission time of the second duration or less. emission of said current first color light at an emission time less than or equal to said current first duration and said current second color light at an emission time less than or equal to said current second duration 4. Illumination method according to any one of the preceding claims, wherein the emission takes place at a current set time. said modified emission of light of the first color at an emission time equal to or less than said modified first duration and said modified second emission at an emission time equal to or less than said modified second duration 5. Illumination method according to any one of the preceding claims, wherein the emission of colored light is performed at a set time after the change. emission of said current first color light at an emission time less than or equal to said current first duration and said current second color light at an emission time less than or equal to said current second duration 5. The lighting method of claim 4, wherein firing is performed at the current set time with a current number of firings. said modified emission of light of the first color at an emission time equal to or less than said modified first duration and said modified second emission at an emission time equal to or less than said modified second duration 6. The illumination method according to claim 5, wherein the emission of colored light is performed at the changed number of times of emission at the changed set time. The lighting method according to any one of claims 1 to 7, wherein the usage status of the space includes at least one of the user's appearance and biometric information.

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