JP7316536B2 - lighting system - Google Patents

Description

The present disclosure relates to lighting systems.

It is known that there is an internal rhythm called a circadian rhythm, and disruption of this rhythm has adverse effects on health, such as insomnia and disorders or diseases of various organs.

Therefore, in recent years, in order to suppress the collapse of the circadian rhythm, a system has been proposed that provides indoor illumination light in conjunction with outdoor ambient light. For example, in Patent Literature 1, by determining the illuminance of an indoor LED lighting unit following the illuminance of sunlight outdoors, light is supplied to the room that changes in a manner similar to that of lighting from a window. there is

JP 2011-108494 A

However, with the technique disclosed in Patent Document 1, the brightness of the entire room is determined by the illuminance of the LED lighting unit, so when the illuminance of the LED lighting unit is low, the visibility of the room may be insufficient.

The present disclosure has been made in consideration of the above points, and an object thereof is to provide a lighting system capable of emitting light that takes circadian rhythm into account without impairing visibility.

A lighting system according to the present disclosure includes:
a base lighting device that emits illumination light into an indoor space;
a production lighting device that emits production light for producing the space into the space;
A lighting system comprising: a control unit that controls emission of the effect light by the effect lighting device based on outdoor ambient light.

In a lighting system according to the present disclosure,
The control unit may control the color temperature of the effect light based on the color temperature of the ambient light as the control of the emission of the effect light.

In a lighting system according to the present disclosure,
The control unit may control the color temperature of the effect light by increasing or decreasing the color temperature of the effect light in accordance with the increase or decrease in the color temperature of the ambient light.

In a lighting system according to the present disclosure,
The base lighting device may maintain the color temperature of the illumination light even when the color temperature of the ambient light increases or decreases.

In a lighting system according to the present disclosure,
The color temperature of the ambient light may be the color temperature of the sun.

In a lighting system according to the present disclosure,
The control unit may control at least one of luminance and illuminance of the effect light based on at least one of luminance and illuminance of the ambient light as control of emission of the effect light.

In a lighting system according to the present disclosure,
The control unit controls at least one of the luminance and illuminance of the effect light to increase or decrease at least one of the luminance and illuminance of the effect light according to an increase or decrease in at least one of the luminance and illuminance of the ambient light. may

In a lighting system according to the present disclosure,
The base lighting device may maintain the luminance and illuminance of the illumination light even when at least one of the luminance and illuminance of the ambient light increases or decreases.

In a lighting system according to the present disclosure,
The control unit may control at least one of luminance and illuminance of the effect light to make the luminance of the effect light lower than the luminance of the illumination light.

In a lighting system according to the present disclosure,
further comprising an acquisition unit that acquires information about the ambient light,
The control section may control emission of the effect light based on the information acquired by the acquisition section.

In a lighting system according to the present disclosure,
The information about the ambient light may include at least one of time, color temperature of the ambient light, brightness of the ambient light, and illuminance of the ambient light.

In a lighting system according to the present disclosure,
The acquisition unit may be a detector that detects information about the ambient light.

In a lighting system according to the present disclosure,
The acquisition unit may be a communication device that acquires information about the ambient light from a server through communication.

In a lighting system according to the present disclosure,
The effect lighting device may be positioned on a ceiling or wall of a room surrounding the space, and may include an optical member having a light-emitting surface along the ceiling or wall.

In a lighting system according to the present disclosure,
A decorative sheet positioned on the ceiling or wall and covering the optical member may be further provided.

In a lighting system according to the present disclosure,
Further comprising a second acquisition unit that acquires the state of the user of the space,
After controlling the emission of the effect light based on the ambient light, the control unit may re-control the emission of the effect light based on the state of the user acquired by the second acquisition unit. good.

In a lighting system according to the present disclosure,
The user's condition may include at least one of the user's blood pressure, the user's heart rate, the user's stress level, and the user's fatigue level.

In a lighting system according to the present disclosure,
The control unit increases or decreases the emission of the effect light according to an increase or decrease in at least one of the color temperature, luminance, and illuminance of the ambient light so that the state of the user reaches a target state. At least one of the color temperature, luminance and illuminance of the effect light may be further increased or decreased.

In a lighting system according to the present disclosure,
The control unit adjusts the color temperature according to at least one of the color temperature, brightness, and illuminance of the ambient light so that the state of the user reaches a target state, as the recontrol of the emission of the effect light. Control may be performed to increase or decrease the intensity of a specific wavelength of the effect light in which at least one of luminance and illuminance is increased or decreased.

In a lighting system according to the present disclosure,
The second acquisition unit may include at least one of a sphygmomanometer attached to the user, a heart rate monitor, and a camera for capturing an image of the user.

In a lighting system according to the present disclosure,
A plurality of the effect lighting devices are arranged side by side along the ceiling,
The control unit controls the emission of the effect light by controlling a light emitting surface or a portion of the light emitting surface of the plurality of light emitting surfaces of the plurality of effect lighting devices in which the brightness of the effect light is maximized in accordance with a change in the position of the sun. may be controlled to change the

In a lighting system according to the present disclosure,
The control unit controls the emission of the effect light by adjusting the color temperature of the effect light emitted from the light emitting surface or a portion of the light emitting surface other than the light emitting surface or the portion of the light emitting surface where the brightness is the maximum. Control may be performed to make the color temperature different from the color temperature of the effect light emitted from the maximum light emitting surface or portion of the light emitting surface.

According to the present disclosure, light can be emitted in consideration of circadian rhythm without impairing visibility.

FIG. 1 is a perspective view showing a lighting system according to this embodiment. FIG. 2 is a block diagram showing the lighting system according to this embodiment. FIG. 3 is a cross-sectional view showing the illumination system according to this embodiment. FIG. 4 is a front view showing the effect lighting device included in the lighting system according to this embodiment. FIG. 5 is an enlarged sectional view showing a surface light source device included in the illumination 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 flow chart showing an operation example of the lighting system according to the second modified example of this embodiment. FIG. 9 is a block diagram showing a lighting system according to a third modified example of this embodiment. FIG. 10 is a block diagram showing a lighting system according to a fourth modified example of this embodiment. FIG. 11 is a flow chart showing an operation example of the lighting system according to the fourth modified example of this embodiment. FIG. 12 is a flow chart showing an operation example of the lighting system according to the fifth modified example of this embodiment. FIG. 13 is a flow chart showing an operation example of the lighting system according to the sixth modification of the present embodiment. FIG. 14 is a diagram showing an operation example of the lighting system according to the sixth modified example of this embodiment. FIG. 15 is a perspective view showing a lighting system according to a seventh modified example of this embodiment. FIG. 16 is a cross-sectional view showing a lighting system according to a seventh modified example of this embodiment. FIG. 17 is an enlarged cross-sectional view showing a surface light source device included in an illumination system according to an eighth modified example of this embodiment. FIG. 18 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. FIG. 19 is an enlarged cross-sectional view showing a surface light source device included in a lighting system according to a tenth modification of this embodiment.

A lighting system according to the present embodiment will be described below with reference to the drawings. In addition, 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 appropriately changed and exaggerated from those of the real thing.

Also, in this specification, the terms "sheet", "film", and "plate" are not to be distinguished from each other based only on the difference in designation. For example, "plate" is a concept that includes members that can be called sheets and films.

Further, the "vertical direction" in this specification is a direction non-parallel to the horizontal direction in a plane parallel to the vertical direction, and does not necessarily match the vertical direction. "Upper" refers to one side in the up-down direction and the side or direction closer to "upper" in the vertical direction. "Lower" refers to the side or direction opposite to "upper" in the vertical direction and closer to "lower" in the vertical direction.

First, a lighting system according to the present embodiment will be described with reference to FIGS. 1 to 6. FIG. FIG. 1 is a perspective view showing a lighting system 1 according to this embodiment. FIG. 2 is a block diagram showing the lighting system 1 according to this embodiment. FIG. 3 is a cross-sectional view showing the illumination system 1 according to this embodiment. FIG. 4 is a front view showing the effect lighting device 20 included in the lighting system 1 according to this embodiment. FIG. 5 is an enlarged sectional view showing the surface light source device 21 included in the illumination system 1 according to this embodiment. FIG. 6 is a flowchart showing an operation example of the lighting system 1 according to this embodiment.

In the examples of FIGS. 1 to 6, the lighting system 1 is provided in a room surrounded by a ceiling CE, side walls W, and a floor F, and can be used to illuminate and present a space S in the room. .

The lighting system 1 includes a base lighting device 3 that emits illumination light Lx into an indoor space S, a plurality of lighting devices 20 that emit lighting light L for lighting the space S into the space S, and a control unit 4. , an acquisition unit and an ambient light information detector 5, which is an example of a detector. A plurality of effect lighting devices 20 are arranged side by side along the ceiling CE.

From the viewpoint of ease of introduction of the lighting system 1, the ceiling CE is preferably a system ceiling. A system ceiling is a ceiling in which the ceiling finishing plate and equipment installed on the ceiling are assembled together. In conventional ceilings, a board is attached to the base and equipment is installed later. It is a method of fitting and setting.

The production lighting device 20 is positioned on the ceiling CE of the room surrounding the space S, and includes a surface light source device 21, a decorative sheet 6, and a support frame 7. - 特許庁The surface light source device 21 is hidden from the space S by the decorative sheet 6 so that the user of the space S cannot directly see it.

(Surface light source device 21)
The surface light source device 21 will be described in detail below. The surface light source device 21 is provided on the ceiling CE and emits the effect light L into the space S.

As shown in FIG. 3, the surface light source device 21 has a light emitting surface 210a along the ceiling CE, and includes an optical member 210 that converts light emitted from a light emitter 220 as a light source into planar light.

The surface light source device 21 is covered with a decorative sheet 6 forming a decorative surface that is the lowermost surface of the lighting device 20 . Separately from the base lighting device 3 mainly aimed at improving the brightness of the space S, the surface light source device 21 illuminates the decorative sheet 6 with transmitted light, thereby effectively reducing the presence of the light source. S can be produced, thereby effectively enhancing the atmosphere of the space S and making the users of the space S have a desired mental state.

As shown in FIG. 5, the surface light source device 21 is configured as an edge light type surface light source device 21 . This surface light source device 21 has a light emitter 220 and an optical member 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 device 21 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 device. Further, as shown in FIG. 3 , the surface light source device 21 may be arranged so that the light emitter 220 is positioned closer to the side wall W than the optical member 210 .

Light emitter 220 emits light. A specific aspect of the light emitter 220 is not particularly limited, and various members capable of selectively emitting light of at least two colors 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 FIGS. 3 and 4 the light emitter 220 is supported by the support frame 7 . As shown in FIG. 4, a plurality of light emitters 220 are arranged at intervals along the longitudinal direction of the support frame 7, that is, the horizontal direction in FIG. The support frame 7 may be removable from the optical member 210 along with the plurality of light emitters 220 . In this case, part or all of the plurality of light emitters 220 can be replaced.

It is known that the color of the effect light L emitted from the effect lighting device 20 affects the psychological state of people. For example, when the space S is illuminated with bright green illumination light or reddish-purple illumination light, it is said that the users of the space S become 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 purpose of the illumination system 1 is to positively affect the psychological state of the user with the effect light L of the effect lighting device 20 and to effectively influence the user's psychological state.

In the illustrated example, the light emitted from each light emitter 220 of the surface light source device 21 becomes the effect light L. As shown in FIG. Therefore, in order to bring about a desired mental state in the user, each light emitter 220 can select 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 device 21 includes a light emitting body 220 capable of emitting red light, a light emitting body 220 capable of emitting green light, and a light emitting body 220 capable of emitting blue light. The color of the effect light L can be selected from colors in the entire range on the chromaticity diagram. The surface light source device 21 may further include a light emitter 220 capable of emitting white light.

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.

As shown in FIG. 5, one of the side surfaces of the light guide plate 211 is a light incident surface 211d into which light emitted from the light emitter 220 enters. The light incident surface 211 d extends along the longitudinal direction of the support frame 7 . The light incident surface 211d faces the multiple light emitters 220 held by the support frame 7 . The plurality of light emitters 220 are arranged at intervals along the longitudinal direction of the light incident surface 211d.

A main surface 211b of the light guide plate 211 is provided with a concave portion 211c functioning as an extraction element for extracting light. The concave portion 211c changes the direction of travel of the light beams L1 and L2 that enter from the light entrance surface 211d and travel through the light guide plate 211 . More specifically, the lights L1 and L2 emitted from the light-emitting body 220 enter the light guide plate 211 and then travel through the light guide plate 211 through internal reflection, particularly total reflection, on the main surfaces 211a and 211b of the light guide plate 211. . 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 L1 and L2 emitted from the light emitting surface 211a of the light guide plate 211 then enter the light diffusion sheet 212. As shown in FIG. 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.

In the examples of FIGS. 1 and 3, the amount of light emitted from a certain position of the light emitting surface 210a is the same as that of the light emitting surface 210a located on the side of the side wall W in the horizontal direction along the light emitting surface 210a, that is, on the side of the light emitter 220. It may be less than the amount of emitted light from a certain position. In this case, the amount of light emitted from the light emitting surface 210a may decrease continuously as the distance from the side wall W, that is, the light emitter 220 increases. Such a configuration can be embodied, for example, by controlling the distribution in the horizontal direction of the concave portions 211c of the light guide plate 211 described with reference to FIG.

(Decorative sheet 6)
As shown in FIGS. 1 and 3, the decorative sheet 6 is positioned on the ceiling CE so as to be exposed to the space S, and hides the surface light source device 21, that is, the optical member 210. As shown in FIG. The decorative sheet 6 forms the surface of the effect lighting device 20 on the most light emitting side. As the decorative sheet 6, for example, the wallpaper of the building or the interior material of the ceiling can be used.

The decorative sheet 6 faces the light-emitting surface 210a of the optical member 210 and is irradiated with light from the rear side by the optical member 210 . The decorative sheet 6 has visible light transmittance. Therefore, the light emitted from the light emitting surface 210 a of the optical member 210 can pass through the decorative sheet 6 . Since the decorative sheet 6 is illuminated with transmitted light in this manner, for example, a white wallpaper having a relatively high transmittance is suitably used as the decorative sheet 6 . However, the pattern of the decorative sheet 6 is not particularly limited, because wallpaper with a relatively low transmittance, such as wood grain wallpaper, can be sufficiently and effectively illuminated to produce the atmosphere of the space S. do not have. The visible light transmittance of the decorative sheet 6 is preferably 1.0% or more, more preferably 5.0% or more. From the viewpoint of eliminating the presence of the surface light source device 21, the visible light transmittance of the decorative sheet 6 is preferably 20% or less. 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.

(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.

(Ambient light information detector 5)
Next, the ambient light information detector 5 will be explained. The ambient light information detector 5 acquires information about ambient light by detecting information about outdoor ambient light. Information about outdoor ambient light is hereinafter also referred to as ambient light information. Ambient light is the light of the outdoor environment, typically sunlight. The ambient light information detector 5 outputs the detected ambient light information to the controller 4 .

The ambient light information is, for example, the time or the color temperature or chromaticity of the ambient light.

The ambient light information detector 5 can be composed of, for example, a clock that detects time, or a color thermometer or colorimeter that detects the color temperature of ambient light. When the ambient light information detector 5 is composed of a color thermometer, the color thermometer is placed outdoors, for example, so that the color temperature of the ambient light can be detected. A color thermometer may be placed indoors near a window.

(control unit 4)
Next, the controller 4 will be explained. The control unit 4 controls emission of the effect light L by the effect lighting device 20 based on the outdoor ambient light. In the examples of FIGS. 1 to 3, the control unit 4 controls emission of the effect light L based on the ambient light information detected or acquired by the ambient light information detector 5. FIG.

More specifically, the control unit 4 controls the color temperature of the effect light L based on the color temperature of the ambient light as control of the emission of the effect light L. As shown in FIG. The color temperature of ambient light is, for example, the color temperature of the sun. The control unit 4 may control the color temperature of the effect light L by increasing or decreasing the color temperature of the effect light L in accordance with the increase or decrease in the color temperature of the ambient light. On the other hand, in order to ensure the clarity of the space S, the base lighting device 3 maintains the color temperature of the illumination light Lx even when the color temperature of the ambient light increases or decreases.

The control unit 4 controls emission of the effect light L by controlling power supplied from a power source (not shown) to the light emitters 220 of the surface light source device 21 . The control of the emission of the effect light L may be performed, for example, based on a table or function describing the correspondence between the power supplied to the light emitter 210 and the physical quantity to be controlled by the effect light L, such as the color temperature. good.

The control unit 4 is configured by hardware such as a computer, for example. At least part of the control unit 4 may be configured by software. Moreover, the control part 4 may be able to cooperate with other components by communication through a network between the one part structure part. A part of the control unit 4 may be located on a device capable of communicating with other components through an external network, such as a cloud server or database. Also, the control unit 4 may be wholly arranged outside the production lighting device 20 , or at least part of it may be arranged inside the production lighting device 20 .

(Operation example)
Next, an operation example of the lighting system 1 will be described with reference to the flowchart of FIG. The flow chart of FIG. 6 is repeated as necessary.

In the initial state of FIG. 6, the effect lighting device 20 emits the effect light L at a predetermined color temperature, and the base lighting device 3 emits the illumination light Lx at a constant color temperature. shall be The color temperature of the effect light L in the initial state may be the color temperature set by the control unit 4 corresponding to the color temperature of the ambient light detected by the ambient light information detector 5, or the color temperature at the start of the operation. default color temperature.

From the initial state, first, the ambient light information detector 5 detects and acquires the color temperature of ambient light as ambient light information (step S1). The ambient light information detector 5, for example, continuously acquires the color temperature of the ambient light at regular time intervals. The ambient light information detector 5 may detect time as the ambient light information.

After obtaining the color temperature of the ambient light, the control unit 4 determines whether the color temperature of the ambient light has increased based on the obtained color temperature of the ambient light (step S2). Note that when the time is acquired as the ambient light information, the control unit 4 estimates the color temperature of the ambient light based on the acquired time, and determines whether the color temperature of the ambient light has increased based on the estimated color temperature. It is sufficient to determine whether or not The estimation of the color temperature of ambient light based on time may be performed, for example, based on a table or function describing the correspondence between time and color temperature.

If the color temperature of the ambient light has increased (step S2: Yes), the controller 4 increases the color temperature of the effect light L (step S3).

On the other hand, if the color temperature of the ambient light does not increase (step S2: No), the control unit 4 determines whether the color temperature of the ambient light has decreased based on the acquired color temperature of the ambient light ( step S4).

When the color temperature of the ambient light has decreased (step S4: Yes), the control unit 4 controls the color temperature of the effect light L to decrease (step S5).

On the other hand, if the color temperature of the ambient light does not decrease (step S4: No), the control section 4 performs maintenance control of the color temperature of the effect light L (step S6).

In the process of increasing, decreasing, or maintaining the color temperature of the effect light L, the base lighting device 3 maintains the color temperature of the illumination light Lx (step S7). The base lighting device 3 may maintain all irradiation conditions of the illumination light Lx including the color temperature. Note that the color temperature of the effect light L and the color temperature of the illumination light Lx can be measured using a color thermometer.

According to the lighting system 1 according to the present embodiment, the base lighting device 3 that stably emits the illumination light Lx into the space S without being affected by outdoor ambient light ensures the visibility of the space S, while controlling By controlling the emission of the production light L by the production lighting device 20 based on the outdoor ambient light by the unit 4, the production light L can be emitted in consideration of the circadian rhythm. That is, according to the illumination system 1, light can be emitted in consideration of the circadian rhythm without impairing the visibility.

More specifically, by making the color temperature of the effect light L closer to the color temperature of the ambient light based on the ambient light information while maintaining the color temperature of the illumination light Lx regardless of the ambient light information, the bright Disruption of circadian rhythm can be suppressed without impairing visibility.

Further, by hiding the surface light source device 21 with the decorative sheet 6, the presence of the surface light source device 21 can be effectively reduced, so that the atmosphere of the space S can be effectively produced.

In addition, since lighting wiring is often already installed on the ceiling CE, the effect lighting device 20 can be installed on the ceiling at low cost by utilizing the existing wiring. Moreover, in the case of a system ceiling, the effect lighting device 20 can be installed more simply.

The lighting system 1 according to the present disclosure is not limited to the configurations shown in FIGS. 1 to 6, and can be variously modified as shown in the following modified examples. In the following description, the same reference numerals as those used for the corresponding portions in the above-described embodiment are used, and overlapping explanations are omitted.

(First modification)
FIG. 7 is a flowchart showing an operation example of the lighting system 1 according to the first modified example of this embodiment.

In FIG. 6, an example of controlling the color temperature of the effect light L based on the color temperature of the ambient light has been described. On the other hand, the lighting system 1 in the first modified example controls the brightness of the effect light L based on the brightness of the ambient light.

Specifically, as shown in FIG. 7, the ambient light information detector 5 first acquires the brightness of the ambient light by detecting the brightness of the ambient light as the ambient light information (step S1a). The ambient light information detector 5 can be composed of, for example, a luminance meter. A luminance meter is placed, for example, outdoors so that it can detect the luminance of ambient light. A luminance meter may be placed indoors near a window.

After acquiring the brightness of the ambient light, the control unit 4 determines whether or not the brightness of the ambient light has increased based on the acquired brightness of the ambient light (step S2a). Note that the control unit 4 may acquire the time as the ambient light information. In this case, the control unit 4 may estimate the brightness of the ambient light based on the acquired time, and determine whether or not the brightness of the ambient light has increased based on the estimated brightness. The estimation of the luminance of ambient light based on time may be performed based on, for example, a table or function describing the correspondence between time and luminance.

If the brightness of the ambient light has increased (step S2a: Yes), the controller 4 increases the brightness of the effect light L (step S3a).

On the other hand, if the brightness of the ambient light does not increase (step S2a: No), the control unit 4 determines whether the brightness of the ambient light has decreased based on the acquired brightness of the ambient light (step S4a). .

When the brightness of the ambient light has decreased (step S4a: Yes), the control unit 4 performs control to decrease the brightness of the effect light L (step S5a).

On the other hand, when the brightness of the ambient light does not decrease (step S4a: No), the control section 4 performs maintenance control of the brightness of the effect light L (step S6a).

In the process of increasing, decreasing, or maintaining the luminance of the effect light L, the base lighting device 3 maintains the luminance of the illumination light Lx (step S7a). The base lighting device 3 may maintain all irradiation conditions of the illumination light Lx including brightness. The luminance of the effect light L and the luminance of the illumination light Lx can be measured using a luminance meter.

Further, in controlling the luminance of the effect light L, the control unit 4 may make the luminance of the effect light L lower than the luminance of the illumination light Lx. In this case, the control unit 4 may control the luminance of the effect light L to 1/10 or less, 1/50 or less, or further 1/100 or less of the luminance of the illumination light Lx depending on the purpose of the effect.

According to the first modification, the brightness of the illumination light Lx is maintained regardless of the brightness of the ambient light, and the brightness of the effect light L is brought closer to the brightness of the ambient light. collapse can be effectively suppressed.

In addition, by setting the luminance of the effect light L lower than the luminance of the illumination light Lx, it is possible to more effectively secure the visibility, and the presence of the surface light source device 21 can be more effectively diluted to reduce the space S. atmosphere can be produced more effectively.

Note that the first modification may be combined with the flowchart of FIG. In that case, it is more effective to maintain the luminance and color temperature of the illumination light Lx regardless of the luminance and color temperature of the ambient light, and bring the luminance and color temperature of the effect light L closer to the luminance and color temperature of the ambient light. In addition, it is possible to suppress the collapse of the circadian rhythm without impairing the clarity.

(Second modification)
FIG. 8 is a flow chart showing an operation example of the lighting system 1 according to the second modified example of this embodiment.

FIG. 6 describes an example of controlling the color temperature of the effect light L based on the color temperature of the ambient light, and FIG. 7 describes an example of controlling the luminance of the effect light L based on the luminance of the ambient light. On the other hand, the lighting system 1 in the second modified example controls the illuminance of the effect light L based on the illuminance of the ambient light.

Specifically, as shown in FIG. 8, the ambient light information detector 5 first acquires the illuminance of the ambient light by detecting the illuminance of the ambient light as the ambient light information (step S1b). The ambient light information detector 5 can be composed of, for example, an illuminometer. The illuminometer is placed outdoors, for example, so that the illuminance of ambient light can be detected. A luminometer may be placed indoors near a window.

After the illuminance of the ambient light is acquired, the controller 4 determines whether the illuminance of the ambient light has increased based on the acquired illuminance of the ambient light (step S2b). Note that the control unit 4 may acquire the time as the ambient light information. In this case, the control unit 4 may estimate the illuminance of the ambient light based on the acquired time, and determine whether or not the illuminance of the ambient light has increased based on the estimated illuminance. The estimation of the illuminance of ambient light based on time may be performed, for example, based on a table or function describing the correspondence between time and illuminance.

If the illuminance of the ambient light has increased (step S2b: Yes), the controller 4 increases the illuminance of the effect light L (step S3b).

On the other hand, if the illuminance of the ambient light does not increase (step S2b: No), the control unit 4 determines whether the illuminance of the ambient light has decreased based on the acquired illuminance of the ambient light (step S4b). .

When the illuminance of the ambient light has decreased (step S4b: Yes), the control unit 4 performs control to decrease the illuminance of the effect light L (step S5b).

On the other hand, if the illuminance of the ambient light does not decrease (step S4b: No), the control section 4 performs maintenance control of the illuminance of the effect light L (step S6b).

In the process of increasing, decreasing, or maintaining the illuminance of the effect light L, the base lighting device 3 maintains the illuminance of the illumination light Lx (step S7b). The base lighting device 3 may maintain all irradiation conditions of the illumination light Lx including the illuminance. The illuminance of the effect light L and the illuminance of the illumination light Lx can be measured using an illuminometer.

According to the second modification, the illuminance of the illumination light Lx is maintained regardless of the illuminance of the ambient light, and the illuminance of the effect light L is brought closer to the illuminance of the ambient light. collapse can be effectively suppressed.

The second modification may be combined with the flowchart of FIG. 6, the first modification, or both. In that case, while maintaining the illuminance, color temperature, and brightness of the illumination light Lx regardless of the illuminance, color temperature, and brightness of the ambient light, By bringing the .

(Third modification)
FIG. 9 is a block diagram showing a lighting system 1 according to a third modified example of this embodiment. 1 to 6, an example of controlling the emission of the effect light L by the effect lighting device 20 based on the ambient light information detected by the ambient light information detector 5 has been described. On the other hand, the lighting system 1 in the third modified example controls the emission of the effect light L by the effect lighting device 20 based on the ambient light information acquired by communication.

Specifically, as shown in FIG. 9, the lighting system 1 includes a communication device 5a, which is an example of an acquisition unit, instead of the ambient light information detector 5 shown in FIGS. The communication device 5 a acquires ambient light information from the server 5 c through communication via an external network 5 b such as the Internet, and outputs the acquired ambient light information to the control unit 4 .

The control unit 4 controls emission of the effect light L by the effect lighting device 20 based on the ambient light information output from the communication device 5a. The specific contents of the ambient light information and the specific contents of the emission control of the effect light L based on the ambient light information are as already explained in FIGS. be.

According to the third modification, the ambient light information can be obtained from the outside of the lighting system 1, so the lighting system 1 does not need to detect the ambient light information by itself. Thereby, the equipment cost of the lighting system 1 can be reduced.

(Fourth modification)
FIG. 10 is a block diagram showing a lighting system 1 according to a fourth modified example of this embodiment. So far, an example has been described in which emission of the effect light L by the effect lighting device 20 is controlled in consideration of only ambient light information. On the other hand, the illumination system 1 according to the fourth modification controls the emission of the effect light L by the effect lighting device 20 in consideration of the state of the user of the space S in addition to the ambient light information. .

Specifically, as shown in FIG. 10, the lighting system 1 in the fourth modification further includes a user state detector 8, which is an example of a second acquisition unit, in addition to the configuration shown in FIG. .

The user state detector 8 acquires the state of the user of the space S by detecting the state of the user of the space S. Hereinafter, the state of the user of the space S will also be referred to as the user state. The user state detector 8 outputs the acquired user state to the control unit 4 .

The user's condition includes at least one of user's blood pressure, user's heart rate, user's stress level, and user's fatigue level. The user condition detector 8 may be composed of, for example, a sphygmomanometer attached to the user, a heartbeat monitor, and a camera that captures the image of the user.

After controlling the emission of the effect light L based on the ambient light information, the control unit 4 re-controls the emission of the effect light L based on the user state obtained by the user state detector 8 .

More specifically, as the re-control of the emission of the effect light L, the control unit 4 adjusts at least one of the color temperature, luminance, and illuminance of the ambient light so that the state of the user reaches the target state. At least one of the color temperature, luminance and illuminance of the effect light L that has been increased or decreased is further increased or decreased.

FIG. 11 is a flow chart showing an operation example of the lighting system 1 according to the fourth modified example of this embodiment. For example, as shown in FIG. 11, after the color temperature of the effect light L is increased (step S3), decreased (step S5), or maintained (step S6) based on the color temperature of the ambient light, The user status detector 8 acquires the user status (step S8).

After the user status is acquired, the control unit 4 determines whether or not the acquired user status is the target status (step S9).

If the user state is the target state (step S9: Yes), the process ends.

On the other hand, if the user's state is not the target state (step S9: No), the control section 4 performs control to increase or decrease the color temperature of the effect light L according to the user's state (step S10).

For example, the color temperature of the ambient light increases from the color temperature of the morning sun to the color temperature of the sunlight in the daytime. If the blood pressure has not risen to the target range in the daytime, the control unit 4 may control the color temperature of the effect light L to further increase.

Also, the color temperature of the ambient light decreases from the color temperature of sunlight in the daytime to the color temperature of the setting sun, and after the color temperature of the effect light L is controlled to decrease according to this decrease in color temperature, the blood pressure of the user increases. If the blood pressure has not fallen to the target range in the evening, the control unit 4 may control the color temperature of the effect light L to further decrease.

The fourth modification may be combined with the flowchart of FIG. 7 of the first modification. In that case, after the luminance of the effect light L is increased (step S3a), decreased (step S5a), or maintained (step S6a) based on the luminance of the ambient light, the user state detector 8 Get user status. After the user status is acquired, the control unit 4 determines whether or not the acquired user status is the target status. If the user state is the target state, the process ends. On the other hand, if the user's state is not the target state, the control unit 4 controls the brightness of the effect light L to increase or decrease according to the user's state.

Also, the fourth modification may be combined with the flowchart of FIG. 8 of the second modification. In that case, after the increase control (step S3b), decrease control (step S5b), or maintenance control (step S6b) of the illuminance of the effect light L is performed based on the illuminance of the ambient light, the user state detector 8 Get user status. After the user status is acquired, the control unit 4 determines whether or not the acquired user status is the target status. If the user state is the target state, the process ends. On the other hand, if the user's state is not the target state, the control unit 4 controls the illuminance of the effect light L according to the user's state.

According to the fourth modification, by considering not only the ambient light information but also the user state, it is possible to more effectively suppress the collapse of the circadian rhythm compared to the case where only the ambient light information is considered. can.

(Fifth Modification)
FIG. 12 is a flow chart showing an operation example of the lighting system 1 according to the fifth modified example of this embodiment. In FIGS. 10 and 11, an example of increasing or decreasing the color temperature, luminance, and illuminance of the effect light L has been described as the recontrol of the emission of the effect light L in consideration of the user's condition. On the other hand, the lighting system 1 in the fifth modified example increases or decreases the intensity of the specific wavelength of the effect light L as re-control of the emission of the effect light L in consideration of the user's condition.

Specifically, as shown in FIG. 12, when the user state is not the target state (step S9: No), the control unit 4 increases or decreases the intensity of the specific wavelength of the effect light L according to the user state. control (step S10a).

Here, it is known that light with a wavelength of around 460 nm suppresses melatonin, a human hormone that has the effect of adjusting the circadian rhythm. Melatonin is also known to dilate blood vessels and lower blood pressure by activating nitric oxide synthesis.

For example, the color temperature of the ambient light increases from the color temperature of the morning sun to the color temperature of the sunlight in the daytime. If the blood pressure does not rise to the target range in the daytime, the control unit 4 increases the intensity of 450 to 500 nm, which is an example of the specific wavelength of the production light L, so that melatonin decreases and the blood pressure rises. You may

Also, the color temperature of the ambient light decreases from the color temperature of sunlight in the daytime to the color temperature of the setting sun, and after the color temperature of the effect light L is controlled to decrease according to this decrease in color temperature, the blood pressure of the user increases. If the blood pressure does not fall to the target range in the evening, the control unit 4 may control the intensity of the effect light L with a wavelength of 450 to 500 nm to decrease so that the melatonin increases and the blood pressure decreases.

According to the fifth modification, as in the fourth modification, by considering not only the ambient light information but also the user state, the circadian rhythm is broken compared to when only the ambient light information is considered. can be suppressed more effectively.

(Sixth modification)
FIG. 13 is a flow chart showing an operation example of the illumination system 1 according to the sixth modified example of this embodiment. So far, an example has been described in which emission of the effect light L is controlled based on the time, color temperature, luminance, and illuminance as environmental light information. On the other hand, the lighting system 1 in the sixth modification controls the emission of the effect light L based on the position of the sun as the environmental light information.

Specifically, as shown in FIG. 13, first, the ambient light information detector 5 acquires the position of the sun (step S11). For example, the ambient light information detector 5 has a plurality of luminance sensors or illuminance sensors installed outdoors so as to face a plurality of different directions, and acquires the direction where the luminance or illuminance of the sensors is maximum as the position of the sun. You may Moreover, when sunlight cannot be detected directly, such as when it is cloudy or rainy, the ambient light information detector 5 may acquire the position of the sun by further considering the time. Alternatively, the communication device 5a may acquire the current time, the sunrise time, and the predicted sunset time from the server 5c, and estimate the position of the sun based on the acquired times.

After the position of the sun is acquired, the control unit 4 maximizes the luminance of the effect light L emitted from the light emitting surface 210a corresponding to the acquired position of the sun among the light emitting surfaces 210a of the plurality of effect lighting devices 20. (step S12).

Next, the control unit 4 determines whether or not the position of the sun has changed based on the detection result of the ambient light information detector 5 (step S13).

If the position of the sun has changed (step S13: Yes), the control unit 4 changes the light emitting surface 210a that maximizes the brightness of the effect light L among the light emitting surfaces 210a of the plurality of effect lighting devices 20 (step S14). ).

On the other hand, if the position of the sun does not change (step S13: No), the control unit 4 maintains the light emitting surface 210a that maximizes the luminance of the effect light L among the light emitting surfaces 210a of the plurality of effect lighting devices 20 ( step S15).

In the process of changing the light emitting surface 210a that maximizes the brightness of the effect light L according to the position of the sun, the control unit 4 controls the effect that the effect light L is emitted from the light emitting surface 210a other than the light emitting surface 210a having the maximum brightness. The color temperature of the light L is made different from the color temperature of the light emitting surface 210a where the effect light L has the maximum luminance (step S16). For example, the control unit 4 controls the color temperature of the effect light L emitted from the light emitting surfaces 210a other than the light emitting surface 210a where the effect light L has the maximum luminance to match the color temperature of the sky.

FIG. 14 is a diagram showing an operation example of the illumination system 1 according to the sixth modified example of this embodiment. According to the sixth modification, as shown in FIG. 14, the position of the sun from the east side to the west side changes with time, that is, among the plurality of light emitting surfaces 210a shown in gray in FIG. The light emitting surface 210a where the effect light L has the maximum luminance can be changed from the east side to the west side.

In the example of FIG. 14, the unit for maximizing the brightness of the effect light L is the entire light emitting surface 210a, but the unit for maximizing the brightness of the effect light L may be a part of the light emitting surface 210a.

According to the sixth modification, by aligning the position of the light emitting surface 210a where the effect light L has the maximum luminance with the position of the sun, it is possible to effectively suppress the collapse of the circadian rhythm.

In addition to the position of the sun, the control unit 4 may also control the emission of the effect light L in consideration of the color temperature, luminance, and illuminance of the ambient light as described above.

(Seventh Modification)
FIG. 15 is a perspective view showing a lighting system 1 according to a seventh modified example of this embodiment. FIG. 16 is a cross-sectional view showing a lighting system 1 according to a seventh modified example of this embodiment.

So far, an example in which the effect lighting device 20 is arranged on the ceiling CE has been described. On the other hand, the effect lighting device 20 in the seventh modification is arranged on the side wall W as shown in FIGS. 15 and 16. FIG. The effect lighting device 20 may function as an inner wall material of the room, that is, a building material panel in a state of being superimposed on the side wall W. In such an example, all or part of the components of the production lighting device 20 may be treated as an assembly kit for manufacturing the production lighting device 20 and distributed or sold. Alternatively, the effect lighting device 20 alone may form the inner wall of the room.

In the example of FIGS. 15 and 16, the surface light source device 21 of the lighting device 20 is arranged at the upper end side of the side wall W extending upward d11 in the vertical direction d1 perpendicular to the floor F. It is However, the arrangement position of the surface light source device 21 is not limited to the examples shown in FIGS. For example, the surface light source device 21 may be arranged on the lower end side of the side wall W, or may be arranged on the center side of the side wall W in the vertical direction d1. Moreover, the side wall W may be substituted with a partition.

As shown in FIG. 16, the optical member 210 of the surface light source device 21 is fixed on the board 50 arranged along the side wall W. As shown in FIG. The board 50 constitutes part of the effect lighting device 20 . More specifically, the surface 5a on the upper end side of the board 50 is provided with a concave portion 51 toward the side wall W, and the optical member 210 is accommodated in the concave portion 51. As shown in FIG. The optical member 210 housed in the recess 51 is fixed to the board 50 via fasteners 9 . In addition to or instead of the fastener 9, the board 50 and the optical member 210 may be fixed by a bonding layer containing an adhesive, a pressure-sensitive adhesive, or the like. A specific aspect of the optical member 210 is as described with reference to FIG. In the example of FIG. 16, the surface light source device 21 is arranged such that the light emitter 220 is located above the optical member 210 d1.

In the example of FIG. 16, the decorative sheet 6 covers the light emitting surface 210a of the optical member 210 and the surface 5a of the board 50 adjacent to the light emitting surface 210a at the lower d12. As a result, the area of the decorative sheet 6 facing the light emitting surface 210a becomes a light emitting area Z1 that emits the effect light L, and the area of the decorative sheet 6 facing the surface 5a of the board 50 is , a non-light-emitting region Z2 from which the effect light L is not emitted.

The light-emitting surface 210a of the optical member 210 is preferably located on the same plane as the surface 5a of the board 50 facing the non-light-emitting region Z2 of the decorative sheet 6. As shown in FIG. In this case, a step is less likely to be formed between the surface 5a of the board 50 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 surface light source device 21 can be effectively made inconspicuous when the lighting device 20 emits light, and the effect of enhancing the atmosphere of the space S by the lighting device 20 is remarkably exhibited.

The board 50 is determined according to the application of the decorative sheet 6 . As an example, the board 50 may be a veneer, plywood, laminated wood, particle board, fibrous board, etc. made of wood of a seed tree, cement-based material such as concrete, mortar, etc., gypsum board, inorganic non-metallic material made of calcium silicate, etc. It becomes a plate or a metal plate made of iron, aluminum, or the like. The board 50 preferably has flame resistance and fire resistance.

16, along with the illustration of the fastener 9, the decorative sheet 6 is shown with a gap between it and the board 50 and the optical member 210. As shown in FIG. However, the decorative sheet 6 may be attached to the board 50 and the optical member 210 without leaving a gap.

In the example of FIG. 16, the support frame 7 that supports the light emitter 220 is provided at the interface between the ceiling CE and the side walls W. As shown in FIG. The support frame 7 covers the joints between the ceiling CE and the side walls W to improve the design of the production lighting device 20. - 特許庁As the support frame 7, a member called a "surrounding edge" or a "baseboard" can be used.

In the examples of FIGS. 15 and 16, the amount of light emitted from a certain position on the light emitting surface 210a is the amount of light emitted from another position on the light emitting surface 210a located above d11 in the vertical direction d1 along the light emitting surface 210a. may be less than In this case, the amount of light emitted from the light emitting surface 210a may decrease continuously from the top d11 toward the bottom d12. Such a configuration can be embodied, for example, by controlling the distribution in the vertical direction d1 of the concave portions 211c of the light guide plate 211 described with reference to FIG.

To effectively enhance the atmosphere of the space S by making the amount of emitted light from a certain position on the light emitting surface 210a smaller than the amount of emitted light from another certain position on the light emitting surface 210a located above the position d11. becomes possible. 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. . As a result, the atmosphere of the space S can be enhanced more effectively, and the user of the space S can be brought into a desired state of mind more reliably.

In order to make the presence of the surface light source device 21 inconspicuous, an example has been described in which the amount of light emitted from the light emitting surface 210a changes along the vertical direction d1. However, the present invention is not limited to this example, and the surface light source device 21 can be made inconspicuous by changing the amount of light emitted from the light emitting region Z1 of the decorative sheet 6 along the vertical direction d1. Therefore, at least one of the amount of light emitted from the light emitting surface 210a and the transmittance of the decorative sheet 6 should be changed along the vertical direction d1.

For example, making the visible light transmittance of the decorative sheet 6 at a certain position lower than the visible light transmittance of the decorative sheet 6 at another certain position located above the position d11 in the vertical direction d1. , the amount of light emitted from the decorative sheet 6 can be reduced at a position close to the non-light-emitting region Z2 located at the lower side d12. According to the effect lighting device 20, the brightness in the light-emitting region Z1 can be made darker in the region adjacent to the non-light-emitting region Z2 than in the region away from the non-light-emitting region Z2. As a result, the presence of the surface light source device 21 can be effectively reduced.

(Eighth modification)
In the example of FIG. 5, the concave portion 211c is illustrated 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 transparency. 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. 17, 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 from 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 entrance 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. 18, light scattering elements 215b functioning as outcoupling elements may be dispersed within the light guide plate main body 211. FIG. In the light guide plate 211 shown in FIG. 18, the light L traveling inside 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. 18, 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).

(Tenth Modification)
So far, an example in which the surface light source device 21 has the light guide plate 211 has been described. On the other hand, as shown in FIG. 19, the surface light source device 21 may omit the light guide plate 211 . The configuration in FIG. 19 corresponds to the configuration in which the light guide plate 211 is omitted from the configuration in FIG. Note that the light emitter 220 , the light diffusion sheet 212 and the reflection sheet 213 may be fixed to the support frame 7 .

According to the tenth modification, since the light guide plate 211 can be omitted, the cost can be reduced, and the weight of the surface light source device 21 can be reduced to improve the handleability.

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 their modifications are included in the scope and gist of the present disclosure, as well as in the scope of the present disclosure described in the claims and equivalents thereof.

1 lighting system 3 base lighting device 4 control unit 20 production lighting device

Claims (20)

a base lighting device that emits illumination light into an indoor space;
a production lighting device that emits production light for producing the space into the space;
a control unit that controls the emission of the production light by the production lighting device based on outdoor ambient light,
The effect lighting device comprises an optical member positioned on the ceiling or wall of the room surrounding the space and having a light emitting surface along the ceiling or wall,
further comprising a decorative sheet positioned on the ceiling or wall to conceal the optical member;
A plurality of the effect lighting devices are arranged side by side along the ceiling,
The control unit controls the emission of the effect light by controlling a light emitting surface or a portion of the light emitting surface of the plurality of light emitting surfaces of the plurality of effect lighting devices in which the brightness of the effect light is maximized in accordance with a change in the position of the sun. A lighting system that controls to change the a base lighting device that emits illumination light into an indoor space;
a production lighting device that emits production light for producing the space into the space;
a control unit that controls the emission of the production light by the production lighting device based on outdoor ambient light,
The effect lighting device comprises an optical member positioned on the ceiling or wall of the room surrounding the space and having a light emitting surface along the ceiling or wall,
The lighting system further includes a decorative sheet positioned on the ceiling or wall and concealing the optical member and having a visible light transmittance of 1% or more and 20% or less. 3. The lighting system according to claim 1 , wherein said control unit controls the color temperature of said effect light based on the color temperature of said ambient light as control of emission of said effect light. 4. The lighting system according to claim 3 , wherein, as control of the color temperature of the effect light, the control unit increases or decreases the color temperature of the effect light according to an increase or decrease in the color temperature of the ambient light. 5. The lighting system of claim 4 , wherein the base lighting device maintains the color temperature of the illumination light even when the color temperature of the ambient light increases or decreases. The lighting system according to any one of claims 3 to 5 , wherein the color temperature of said ambient light is the color temperature of the sun. 3. The lighting system according to claim 1, wherein said control unit controls at least one of brightness and illuminance of said effect light based on at least one of brightness and illuminance of said ambient light as control of emission of said effect light. system. The control unit controls at least one of the luminance and illuminance of the effect light to increase or decrease at least one of the luminance and illuminance of the effect light according to an increase or decrease in at least one of the luminance and illuminance of the ambient light. 8. A lighting system according to claim 7 . 9. The lighting system according to claim 8 , wherein the base lighting device maintains the luminance and illuminance of the illumination light even when at least one of the luminance and illuminance of the ambient light increases or decreases. 10. The lighting system according to claim 8 , wherein the control unit controls the luminance of the effect light so that the luminance of the effect light is lower than the luminance of the illumination light. further comprising an acquisition unit that acquires information about the ambient light,
The lighting system according to any one of claims 1 to 10 , wherein the control section controls emission of the effect light based on the information acquired by the acquisition section. 12. The lighting system according to claim 11 , wherein the information about the ambient light includes at least one of time, color temperature of the ambient light, brightness of the ambient light, and illuminance of the ambient light. 13. The lighting system according to claim 11 or 12 , wherein said acquisition unit is a detector that detects information about said ambient light. The lighting system according to claim 11 or 12 , wherein the acquisition unit is a communication device that acquires information about the ambient light from a server through communication. Further comprising a second acquisition unit that acquires the state of the user of the space,
wherein, after controlling emission of the effect light based on the ambient light, the control unit re-controls emission of the effect light based on the state of the user acquired by the second acquisition unit. Item 15. The lighting system according to any one of Items 1 to 14 . 16. The lighting system according to claim 15 , wherein the user's condition includes at least one of the user's blood pressure, the user's heart rate, the user's stress level, and the user's fatigue level. The control unit increases or decreases the emission of the effect light according to an increase or decrease in at least one of the color temperature, luminance, and illuminance of the ambient light so that the state of the user reaches a target state. 17. The lighting system according to claim 15 or 16 , further controlling to increase or decrease at least one of color temperature, luminance and illuminance of said effect light. The control unit adjusts the color temperature according to at least one of the color temperature, brightness, and illuminance of the ambient light so that the state of the user reaches a target state, as the recontrol of the emission of the effect light. 17. The lighting system according to claim 15 or 16 , wherein control is performed to increase or decrease the intensity of a specific wavelength of said effect light in which at least one of luminance and illuminance is increased or decreased. 19. The lighting system according to any one of claims 15 to 18 , wherein said second acquisition unit includes at least one of a sphygmomanometer attached to said user, a heart rate monitor, and a camera for photographing said user. The control unit controls the emission of the effect light by adjusting the color temperature of the effect light emitted from the light emitting surface or a portion of the light emitting surface other than the light emitting surface or the portion of the light emitting surface where the brightness is the maximum. 2. The lighting system according to claim 1 , wherein control is performed to make the color temperature of the effect light emitted from the maximum light emitting surface or a portion of the light emitting surface different.

Images