Lighting system, lighting fixture, and lighting control system

Abstract

The present disclosure addresses the problem of providing a lighting system that exhibits a high relaxation effect and a high sleep induction effect. A lighting system (100) is provided with: a chair (2) having a backrest (21); and a lighting fixture (1) having a light-emitting unit (11). The light-emitting unit (11) of the lighting fixture (1) is disposed at a position outside a first region (R1) that includes, as outer edges, a half line (LA1) that extends from a reference point (211) to the front side of the backrest (21) and extends from the reference point (211) in a direction that forms 8° upward with respect to a first direction (D1), a half line (LA2) that extends from the reference point (211) in a direction that forms 12° downward with respect to the first direction (D1), a half line that extends from the reference point (211) in a direction that forms 15° rightward with respect to the first direction (D1), and a half line that extends from the reference point (211) in a direction that forms 15° leftward with respect to the first direction (D1). The distance between the light-emitting unit (11) of the lighting fixture (1) and the reference point (211) is 500 mm or more.

Description

Lighting system, lighting fixture, and lighting control system

[0001] The present disclosure relates to a lighting system, a lighting fixture, and a lighting control system, and more particularly to a lighting system including a chair, and a lighting fixture and a lighting control system used in the lighting system.

[0002] Patent Document 1 discloses a vehicle lighting device (lighting fixture) for use in a vehicle having seats (chairs). The vehicle lighting device disclosed in Patent Document 1 is equipped with sleep-inducing lighting. In the vehicle lighting device of Patent Document 1, the sleep-inducing lighting is arranged below the vehicle and to the side of the seats.

[0003] However, with the vehicle lighting device disclosed in Patent Document 1, the sleep-inducing effect may not be sufficient depending on the positional relationship between the vehicle lighting device and the seat, particularly the vertical positional relationship, and the brightness of the vehicle lighting device.

[0004] Japanese Patent Application Laid-Open No. 2021-20559

[0005] The present disclosure aims to provide a lighting system, lighting fixture, and lighting control system that can enhance relaxation and sleep-inducing effects.

[0006] According to one aspect of the present disclosure, there is provided a lighting system comprising: a chair having a backrest; and a lighting fixture having a light-emitting unit. When the angle of the backrest of the chair is a predetermined angle, the light-emitting unit of the lighting fixture is disposed outside a first region including, as outer edges thereof, a half-ray extending from the reference point in a direction that forms an 8° upward angle with respect to a first direction that is a normal direction of the backrest at the reference point, a half-ray extending from the reference point in a direction that forms an 8° downward angle with respect to the first direction, a half-ray extending from the reference point in a direction that forms an 15° rightward angle with respect to the first direction, and a half-ray extending from the reference point in a direction that forms an 15° leftward angle with respect to the first direction. When the angle of the backrest of the chair is the predetermined angle, the distance between the light-emitting unit of the lighting fixture and the reference point is 500 mm or more.

[0007] A lighting device according to one aspect of the present disclosure is used in a lighting system including a chair with a backrest. The lighting device includes a light-emitting unit. When the angle of the backrest of the chair is a predetermined angle, the light-emitting unit of the lighting device is disposed outside a first region that includes, as outer edges, a half-ray extending from the reference point in a direction that forms an 8° upward angle with respect to a first direction that is a normal direction of the backrest at the reference point, a half-ray extending from the reference point in a direction that forms an 8° downward angle with respect to the first direction, a half-ray extending from the reference point in a direction that forms an 15° rightward angle with respect to the first direction, and a half-ray extending from the reference point in a direction that forms an 15° leftward angle with respect to the first direction. When the angle of the backrest of the chair is the predetermined angle, the distance between the lighting device and the reference point is 500 mm or more.

[0008] A lighting control system according to one aspect of the present disclosure includes the lighting device and a control device that controls the lighting device.

[0009] FIG. 1 is a schematic side view showing the configuration of a lighting system according to a first embodiment. FIG. 2 is a schematic diagram showing the relationship between an area included in a person's visual field and the center of the visual field. FIG. 3 is a schematic side view showing another state of the configuration of the lighting system according to the first embodiment. FIG. 4 is an example of a visual field area of ​​a user in the lighting system according to the first embodiment. FIG. 5 is a block diagram showing the configuration of a lighting control system according to a second embodiment. FIG. 6 is a schematic diagram showing the relationship between a light source of a lighting fixture and the center of the visual field in a lighting system according to a third embodiment. FIG. 7 is a schematic side view showing the configuration of a lighting system according to a fourth embodiment. FIG. 8 is a schematic side view showing the configuration of a lighting system according to a fifth embodiment. FIG. 9 is a schematic side view showing the configuration of a lighting system according to a sixth embodiment.

[0010] The lighting fixtures according to the first to sixth embodiments and their modifications will be described below with reference to the drawings. Note that the drawings referred to in the following first to sixth embodiments and their modifications are all schematic drawings, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0011] First Embodiment 1. Overall Configuration of Lighting System As shown in FIG. 1 , a lighting system 100 according to a first embodiment includes a lighting fixture 1 and a chair 2 .

[0012] The chair 2 is installed in a space where a user can take a nap, for example. The space may be, for example, the cabin of a passenger car, a bus passenger compartment, a train passenger compartment, an airplane passenger compartment, or a nap room in a building. The space is used by a user P1 naturally sitting in the chair 2. Hereinafter, directions within the space will be indicated as up, down, right, left, front, and rear, with the chair 2 as the reference point.

[0013] The chair 2 includes a backrest 21 and a seat surface 22. The center line of the visual field (hereinafter referred to as the "line of sight") of a user P1 seated naturally in the chair 2 facing forward is located on a half line A0 extending forward from the upper end of the backrest 21, at the center in the left-right direction (hereinafter referred to as the "upper end center of the backrest 21") 211. Here, the half line A0 extends from the upper end center 211 of the backrest 21 in a normal direction (hereinafter referred to as the "first direction") D1 of the backrest 21 at the upper end center 211 of the backrest 21.

[0014] The chair 2 is a so-called reclining seat, in which the orientation of the backrest 21 can be changed. Hereinafter, the angle between the normal direction of the backrest 21 and the normal direction of the seat surface 22 will be referred to as the angle a1 of the backrest 21. For example, when the angle a1 of the backrest 21 is 60°, the angle between the normal direction of the backrest 21 and the horizontal direction is 30°, and the chair functions as a chair. For example, when the angle a1 of the backrest 21 is 0°, the normal direction of the backrest 21 and the normal direction of the seat surface 22 are parallel, and the chair functions as a bed. The angle a1 of the backrest 21 corresponds to the predetermined angle in the present disclosure, and the predetermined angle is, for example, 60°, 0°, or any angle between 0° and 60°.

[0015] 2. Configuration of the Lighting Device The lighting device 1 includes a light source 11. The light source 11 includes, for example, a plurality of white LEDs for illumination. The plurality of LEDs included in the light source 11 are controlled to be turned on or off. The light source 11 corresponds to a light-emitting unit in the present disclosure. The lighting device 1 includes, for example, a control unit that controls the lighting of the light source 11.

[0016] 3. Relationship between chairs and lighting fixtures The relationship between chairs and lighting fixtures will be explained in detail below.

[0017] (1) Field of View from a Chair Figure 2 is a diagram showing a person's visual field. The person's visual field includes an effective visual field R1, an induced visual field R2, and an auxiliary visual field R3. Each of the effective visual field R1, the induced visual field R2, and the auxiliary visual field R3 is a three-dimensional area, and the end faces of each area, normal to the direction of the line of sight (hereinafter referred to as the "line of sight direction"), have similar shapes that expand in proportion to the distance between the end faces and the position of the eyes. Therefore, the effective visual field R1, the induced visual field R2, and the auxiliary visual field R3 will be described below based on the end faces shown in Figure 2.

[0018] In Fig. 2, the left-right direction is a direction based on the user P1 sitting naturally in the chair 2, and is perpendicular to the first direction D1. The up-down direction is a direction based on the user P1 sitting naturally in the chair 2, and is perpendicular to the left-right direction and also perpendicular to the center line of the user P1's line of sight. That is, in Fig. 2, the up-down direction (hereinafter also referred to as the "second direction D2") is perpendicular to the left-right direction and also perpendicular to the first direction D1. Therefore, if the first direction D1 does not coincide with the horizontal direction, the second direction D2 (see Fig. 1) does not coincide with the vertical direction.

[0019] In the human visual field, the effective visual field R1 is the range in which information can be received with high accuracy, and when an object of interest is present within the effective visual field R1, the gaze instantaneously moves to that object. The end face of the effective visual field R1, with the gaze direction as the normal direction, includes the ellipse e1 shown in Figure 2 and its interior. The effective visual field R1 is an elliptical cone with its apex at the position of the eyes and its height direction aligned with the gaze direction.

[0020] The outer edge of the visual field R1 includes a half-line (half-line LA1 in FIG. 1 ) extending from the eye position in a direction forming an 8° angle upward with respect to the line of sight. The outer edge of the visual field R1 also includes a half-line (half-line LA2 in FIG. 1 ) extending from the eye position in a direction forming an 12° angle downward with respect to the line of sight. The outer edge of the visual field R1 also includes a half-line (half-line LA2 in FIG. 1 ) extending from the eye position in a direction forming an 15° angle to the right with respect to the line of sight and a half-line (half-line LA2) extending from the eye position in a direction forming an 15° angle to the left with respect to the line of sight.

[0021] The induced visual field R2 is a range that creates a sense of realism, and the induced effect is generated by visual information. The end face of the effective visual field R1, whose normal direction is the line of sight, is the ellipse e2 shown in Figure 2, the inside of the ellipse e2, and the outside of the ellipse e1. The induced visual field R2 is a shape that excludes the effective visual field R1 from an elliptical cone whose apex is the eye position and whose height direction is the line of sight.

[0022] The outer edge of the induced visual field R2 includes a half-line extending from the eye position in a direction forming a 35° angle upward with respect to the line of sight (half-line LB1 in FIG. 1 ). The outer edge of the induced visual field R2 also includes a half-line extending from the eye position in a direction forming a 50° angle downward with respect to the line of sight (half-line LB2 in FIG. 1 ). The outer edge of the induced visual field R2 also includes a half-line extending from the eye position in a direction forming a 50° angle to the right with respect to the line of sight and a half-line extending from the eye position in a direction forming a 50° angle to the left with respect to the line of sight. The inner edge of the induced visual field R2 is in contact with the outer edge of the effective visual field R1.

[0023] The auxiliary visual field R3 is the range in which simple visual information can be detected and accepted. The end face of the auxiliary visual field R3, with the line of sight as its normal direction, is the ellipse e3 and its interior, and the outside of the ellipse e2 shown in Figure 2. The auxiliary visual field R3 is shaped like an ellipse cone with its apex at the position of the eyes and its height direction aligned with the line of sight, excluding the effective visual field R1 and the induced visual field R2.

[0024] The outer edge of the auxiliary visual field R3 includes a half-line extending from the eye position in a direction forming a 50° angle above the line of sight (half-line LC1 in FIG. 1 ). The outer edge of the induced visual field R2 includes a half-line extending from the eye position in a direction forming a 75° angle below the line of sight (half-line LC2 in FIG. 1 ). The outer edge of the induced visual field R2 also includes a half-line extending from the eye position in a direction forming a 100° angle to the right with respect to the line of sight and a half-line extending from the eye position in a direction forming a 100° angle to the left with respect to the line of sight. The inner edge of the auxiliary visual field R3 is in contact with the outer edge of the induced visual field R2.

[0025] Therefore, in order for lighting device 1 to exert its relaxation and sleep-inducing effects, it is preferable that light source 11 of lighting device 1 be located outside of effective visual field R1. If light source 11 of lighting device 1 is located within effective visual field R1, user P1 sitting naturally in chair 2 may receive light emitted from light source 11 with high performance, which may disrupt user P1's sleep. In other words, it is preferable that light source 11 of lighting device 1 be located outside effective visual field R1 but within induced visual field R2.

[0026] Furthermore, when light source 11 of lighting device 1 is located in auxiliary visual field R3, user P1, who is naturally seated in chair 2, perceives the light emitted from light source 11 as simple visual information and does not undergo advanced information reception. This allows lighting device 1 to exert a relaxation effect and a sleep-inducing effect on user P1. In other words, it is more preferable that light source 11 of lighting device 1 be located outside induced visual field R2 but within auxiliary visual field R3.

[0027] (2) Relative Positional Relationship Between Chair and Lighting Fixture Fig. 1 is a schematic diagram showing the positional relationship between chair 2 and light source 11 of lighting fixture 1 as viewed from the left and right in a plan view. In Fig. 1, the angle of backrest 21 of chair 2 is 60°.

[0028] As shown in FIG. 1, when a user P1 is sitting naturally in a chair 2 and looking straight ahead, the line of sight of the user P1 is on a half line A0 extending forward from the center 211 of the upper end of the backrest 21.

[0029] The distance between the eyes of the user P1 and the light source 11 of the lighting device 1 is 500 mm or more. That is, the distance d1 between the light source 11 of the lighting device 1 and the upper center 211 of the backrest 21 is 500 mm or more.

[0030] Furthermore, the optical axis of light emitted from light source 11 of lighting fixture 1 does not pass through a sphere with a radius of 250 mm centered at the top center 211 of backrest 21. This prevents the light emitted from light source 11 of lighting fixture 1 from reaching the eyes of user P1 directly. Note that the expression "the optical axis of light emitted from light source 11 of lighting fixture 1 does not pass through a sphere with a radius of 250 mm centered at the top center 211 of backrest 21" includes cases where the light emitted from light source 11 of lighting fixture 1 is diffused light that does not have an optical axis.

[0031] Furthermore, the light source 11 of the lighting fixture 1 is located outside the effective visual field R1. In the lighting system 100 according to the first embodiment, the upper center 211 of the backrest 21 is regarded as the position of the eyes of the user P1, and the light source 11 is disposed outside the effective visual field R1. In other words, the upper center 211 of the backrest 21 corresponds to the reference point.

[0032] 1 , the light source 11 of the lighting fixture 1 is located below a half-line LA2 that extends forward from the upper center 211 of the backrest 21 at a direction that forms a 12° downward angle with respect to the half-line A0. The effective field of view R1 is located between the half-line LA1 that extends forward from the upper center 211 of the backrest 21 at a direction that forms a 8° upward angle with respect to the half-line A0, and the half-line LA2. More specifically, the outer edge of the effective field of view R1 includes, in addition to the half-lines LA1 and LA2, a half-line that extends forward from the upper center 211 of the backrest 21 at a direction that forms a 15° rightward angle with respect to the half-line A0, and a half-line that extends forward from the upper center 211 of the backrest 21 at a direction that forms a 15° leftward angle with respect to the half-line A0. As a result, as described above, the user P1, who is naturally seated in the chair 2, is able to reduce the high-performance information reception of the light emitted from the light source 11, and the lighting device 1 can exert a relaxing effect and a sleep-inducing effect on the user P1.

[0033] As shown in FIG. 1 , the light source 11 of the lighting device 1 is preferably located outside the induction field R2. Here, the induction field R2 is located between a half line LB1 extending forward from the upper center 211 of the backrest 21 and forming an upward angle of 35° with respect to the half line A0, and a half line LB2 extending forward from the upper center 211 of the backrest 21 and extending downward from the half line A0 and forming an downward angle of 50° with respect to the half line A0. More specifically, in addition to the half lines LB1 and LB2, the outer edge of the induction field R2 also includes a half line extending forward from the upper center 211 of the backrest 21 and extending rightward from the half line A0 and a half line extending forward from the upper center 211 of the backrest 21 and extending leftward from the half line A0 and forming an upward angle of 50° with respect to the half line A0. This enables the lighting device 1 to exert a relaxation effect and a sleep-inducing effect on the user P1.

[0034] It is preferable that light source 11 of lighting device 1 is outside of effective visual field R1 regardless of the angle of backrest 21 of chair 2. More specifically, as shown in FIG. 3 , light source 11 of lighting device 1 is outside effective visual field R1 even when the angle of backrest 21 of chair 2 is 0°. When the angle of backrest 21 of chair 2 is 0°, the normal direction (first direction) D1 of backrest 21 at the upper center 211 of backrest 21 is the up-down direction. User P1's line of sight is on half line A0 extending upward from the upper center 211 of backrest 21. Therefore, the ranges of effective visual field R1, induced visual field R2, and auxiliary visual field R3, and the respective positions of half lines LA1, LA2, LB1, LB2, LC1, and LC2 move to the positions shown in FIG. 3 . Light source 11 of lighting device 1 is located outside effective field of view R1 whether the angle of backrest 21 of chair 2 is between 0° and 60°. Furthermore, when the angle of backrest 21 of chair 2 is 0°, distance d2 between light source 11 of lighting device 1 and upper center 211 of backrest 21 is 500 mm or more. Therefore, even if user P1 freely sets the angle of backrest 21 of chair 2, lighting device 1 can still provide a relaxing effect and a sleep-inducing effect to user P1.

[0035] Furthermore, it is preferable that light source 11 of lighting device 1 is located outside of induced visual field R2 regardless of the angle of backrest 21 of chair 2. More specifically, as shown in Fig. 3 , light source 11 of lighting device 1 is located outside of induced visual field R2 even when the angle of backrest 21 of chair 2 is 0°. Therefore, light source 11 of lighting device 1 is located outside of induced visual field R2 whether the angle of backrest 21 of chair 2 is between 0° and 60°. Therefore, even if user P1 freely sets the angle of backrest 21 of chair 2, lighting device 1 can still provide a relaxation effect and a sleep-inducing effect to user P1.

[0036] Furthermore, it is preferable that the light source 11 of the lighting device 1 is disposed below the half line A0, which makes it easy to dispose the light source 11 outside the effective visual field R1 or the induced visual field R2 regardless of the angle of the backrest 21 of the chair 2.

[0037] (3) Luminance If the luminance in the visual field of the user P1 is high, sleep may be disturbed. Therefore, it is preferable that the luminance in the visual field of the user P1 satisfies the following condition.

[0038] (3.1) Cases where there is a possibility of influence of external light When there is an influence of a light source other than the lighting fixture 1, the luminance of the area illuminated by the light source 11 of the lighting fixture 1 is 100 cd / m in the auxiliary visual field R3 (see Figure 2). ２The auxiliary visual field R3 is a region excluding the effective visual field R1 and the induced visual field R2 from a truncated cone-shaped region that includes, as its outer edges, a half-line LC1 (see FIGS. 1 and 3 ) that extends forward from the upper center 211 of the backrest 21 and forms an angle of 50° upward with respect to the half-line A0, a half-line LC2 (see FIGS. 1 and 3 ) that extends forward from the upper center 211 of the backrest 21 and forms an angle of 75° downward with respect to the half-line A0, a half-line LC2 that extends forward from the upper center 211 of the backrest 21 and forms an angle of 100° to the right with respect to the half-line A0, and a half-line LC3 that extends forward from the upper center 211 of the backrest 21 and forms an angle of 100° to the left with respect to the half-line A0. For example, if the chair 2 is a rear seat of a car, the auxiliary field of view R3 includes a region R11 below the front seat (see FIG. 4).

[0039] Here, the case where there is an influence of a light source other than the lighting fixture 1 means that the luminance in the auxiliary visual field R3 when the light source 11 of the lighting fixture 1 is not emitting light is 10 cd / m ２ In other words, the auxiliary field of view R3 is illuminated with light from a light source other than the lighting fixture 1. Therefore, when the luminance in the auxiliary field of view R3 is 100 cd / m or less, ２ The term "equal to or less" means that when both light from the light source 11 of the lighting fixture 1 and light from a light source other than the lighting fixture 1 are irradiated, the luminance in the auxiliary visual field R3 is 100 cd / m ２ This means that:

[0040] Therefore, the luminance of auxiliary visual field R3 in the visual field of user P1 illuminated by light source 11 of lighting device 1 is sufficiently low, thereby reducing the possibility that the light emitted by light source 11 of lighting device 1 will interfere with the relaxation and sleep-inducing effects on user P1.

[0041] (3.2) When there is no influence of external light, the luminance of the area illuminated by the light source 11 of the lighting fixture 1 is 50 cd / m in the auxiliary visual field R3 when there is no influence of light sources other than the lighting fixture 1. ２Here, the absence of influence from light sources other than the lighting fixture 1 means that the luminance in the auxiliary visual field R3 when the light source 11 of the lighting fixture 1 is not emitting light is 10 cd / m or less. ２ In this case, the visual field of the user P1 is darker than when there is the influence of external light, so the luminance in the auxiliary visual field R3 when the light source 11 of the lighting fixture 1 is emitting light is 50 cd / m or less. ２ This makes it possible to reduce the possibility that the light emitted by light source 11 of lighting device 1 will interfere with the relaxation and sleep-inducing effects on user P1.

[0042] 4. Effects The lighting device 1 according to the first embodiment includes a chair 2 having a backrest 21 and a lighting device 1 having a light source 11. When the angle of the backrest 21 of the chair 2 is 0° or 60°, the following condition is satisfied. That is, the light-emitting unit 11 of the lighting device 1 is disposed outside an effective field of view R1 that includes as its outer edges a half-line LA1 extending from the upper center 211 of the backrest 21 toward the front of the backrest 21 and that forms an angle of 8° upward with respect to a first direction D1 that is the normal direction of the backrest 21, a half-line LA2 extending from the upper center 211 of the backrest 21 in a direction that forms an angle of 12° downward with respect to the first direction D1, a half-line LA2 extending from the upper center 211 of the backrest 21 in a direction that forms an angle of 15° to the right with respect to the first direction D1, and a half-line LA3 extending from the upper center 211 of the backrest 21 in a direction that forms an angle of 15° to the left with respect to the first direction D1. The distance between the light source 11 of the lighting device 1 and the upper center 211 of the backrest 21 is 500 mm or more. This reduces the high-performance information reception of light emitted from the light source 11 by the user P1 who is naturally seated in the chair 2, and enables the lighting device 1 to exert a relaxing effect and a sleep-inducing effect on the user P1.

[0043] Furthermore, in lighting device 1 according to embodiment 1, when the angle of backrest 21 of chair 2 is 0° or 60°, the following condition is satisfied: light-emitting unit 11 of lighting device 1 is disposed outside of induced field of view R2, which extends from upper center 211 of backrest 21 toward the front side of backrest 21 and includes as outer edges a half-line LB1 extending from upper center 211 of backrest 21 in a direction forming an upward angle of 35° with respect to first direction D1, a half-line LB2 extending from upper center 211 of backrest 21 in a direction forming an downward angle of 50° with respect to first direction D1, a half-line LB2 extending from upper center 211 of backrest 21 in a direction forming an angle of 50° to the right with respect to first direction D1, and a half-line extending from upper center 211 of backrest 21 in a direction forming an angle of 50° to the left with respect to first direction D1. This further reduces the reception of light emitted from the light source 11 by the user P1, who is naturally seated in the chair 2, and enables the lighting device 1 to exert a stronger relaxation effect and sleep-inducing effect on the user P1.

[0044] Furthermore, in lighting device 1 according to embodiment 1, light source 11 of lighting device 1 is disposed below half line A0 extending in first direction D1 from upper center 211 of backrest 21. This makes it easy to dispose light source 11 outside effective field of view R1 or outside induced field of view R2, regardless of the angle of backrest 21 of chair 2, when backrest 21 of chair 2 is reclining.

[0045] Furthermore, in the lighting device 1 according to the first embodiment, the luminance is 100 cd / m in the auxiliary visual field R3, which is outside the induced visual field R2 and is an area extending from the upper center 211 of the backrest 21 to the front side of the backrest 21, and which includes, as outer edges thereof, a half-line LC1 extending from the upper center 211 of the backrest 21 in a direction forming 50° upward with respect to the first direction D1, a half-line LC2 extending from the upper center 211 of the backrest 21 in a direction forming 75° downward with respect to the first direction D1, a half-line LC2 extending from the upper center 211 of the backrest 21 in a direction forming 100° right with respect to the first direction D1, and a half-line LC3 extending from the upper center 211 of the backrest 21 in a direction forming 100° left with respect to the first direction D1. ２This makes it possible to reduce the possibility that the light emitted from light source 11 of lighting device 1 will interfere with the relaxation and sleep-inducing effects on user P1.

[0046] Furthermore, in the lighting fixture 1 according to the first embodiment, the luminance in the auxiliary visual field R3 when the light source 11 of the lighting fixture 1 is not emitting light is 10 cd / m ２ and the luminance when the light source 11 of the lighting fixture 1 is emitting light is 50 cd / m ２ This makes it possible to reduce the possibility that the light emitted by light source 11 of lighting device 1 will interfere with the relaxation and sleep-inducing effects on user P1.

[0047] Furthermore, in the lighting fixture 1 according to the first embodiment, the optical axis of the light emitted from the light source 11 of the lighting fixture 1 does not pass through an area with a radius of 250 mm centered on the upper center 211 of the backrest 21. This prevents the light emitted from the light source 11 of the lighting fixture 1 from directly reaching the eyes of the user P1.

[0048] Second Embodiment 1. Configuration A lighting system 100 according to a second embodiment includes a lighting control system 10. As shown in Fig. 5 , the lighting control system 10 includes a lighting fixture 1 and a control device 15. The control device 15 controls the light intensity of light emitted from a light source 11 of the lighting fixture 1.

[0049] In the lighting fixture 1 according to the second embodiment, the light intensity of the light emitted from the light source 11 of the lighting fixture 1 is changed under the control of the control device 15. More specifically, the light intensity of the light emitted from the light source 11 increases or decreases over time. More specifically, the light intensity of the light emitted from the light source 11 changes, for example, in a sinusoidal manner according to a predetermined frequency. The control device 15 stores, for example, a pattern indicating the time-series change in the light intensity of the light emitted from the light source 11, and changes the emission intensity of the light source 11 according to the pattern. Note that the change in the light intensity of the light emitted from the light source 11 does not have to be sinusoidal, and may be any manner as long as it includes times when the light intensity increases and times when the light intensity decreases.

[0050] In the lighting device 1 according to the second embodiment, when there is an influence of a light source other than the lighting device 1, the maximum luminance value in the auxiliary visual field R3 is 100 cd / m ２ More specifically, the control device 15 determines whether the maximum luminance in the auxiliary visual field R3 is 100 cd / m when the light intensity of the light emitted from the light source 11 is at its maximum. ２ As a result, in the lighting device 1 according to the second embodiment, when there is an influence from a light source other than the lighting device 1, the luminance in the auxiliary visual field R3 is always 100 cd / m ２ Therefore, it is possible to reduce the possibility that the light emitted by light source 11 of lighting device 1 will interfere with the sleep-inducing effect on user P1, and to improve the relaxation effect due to changes in light intensity.

[0051] Furthermore, in the lighting device 1 according to the second embodiment, when there is no influence from light sources other than the lighting device 1, the maximum luminance in the auxiliary visual field R3 is 50 cd / m ２ More specifically, the control device 15 determines whether the maximum luminance in the auxiliary visual field R3 is 50 cd / m when the light intensity of the light emitted from the light source 11 is at its maximum. ２ As a result, in the lighting device 1 according to the second embodiment, when there is no influence from a light source other than the lighting device 1, the luminance in the auxiliary visual field R3 is always 50 cd / m ２ Therefore, it is possible to reduce the possibility that the light emitted by light source 11 of lighting device 1 will interfere with the sleep-inducing effect on user P1, and to improve the relaxation effect due to changes in light intensity.

[0052] 2. Effects In the lighting device 1 according to the second embodiment, the intensity of light emitted from the light source 11 is changed. In the auxiliary visual field R3, the maximum luminance is 100 cd / m ２ This reduces the possibility that the light emitted by light source 11 of lighting device 1 will interfere with the sleep-inducing effect on user P1. Furthermore, changing the light intensity of light source 11 can improve the relaxation effect.

[0053] Furthermore, in the lighting device 1 according to the second embodiment, the light intensity of the light emitted from the light source 11 is changed. In the auxiliary visual field R3, when the light source 11 of the lighting device 1 is not emitting light, the luminance is 10 cd / m ２ and the maximum luminance when the light source 11 of the lighting fixture 1 is emitting light is 50 cd / m ２ This reduces the possibility that the light emitted by light source 11 of lighting device 1 interferes with the sleep-inducing effect on user P1. Furthermore, changing the light intensity of light source 11 can improve the relaxation effect.

[0054] Furthermore, lighting control system 10 according to the second embodiment includes lighting fixture 1 and control device 15 that controls lighting fixture 1. This makes it possible to control lighting fixture 1 so that light emitted from light source 11 of lighting fixture 1 exerts a relaxation effect and a sleep-inducing effect.

[0055] (Third embodiment) 1. Configuration In the lighting fixture 1 according to the third embodiment, the upper center 211 of the backrest 21 and the light source 11 of the lighting fixture 1 are located on a plane perpendicular to the left-right direction, but the upper center 211 of the backrest 21 and the light source 11 of the lighting fixture 1 may be located at different positions in the left-right direction.

[0056] FIG. 6 is a schematic diagram based on the line of sight of a user P1 who is on a half line A0 extending forward from the center 211 of the upper end of the backrest 21.

[0057] As a first specific example of the third embodiment, the light source 11 of the lighting fixture 1 is located between a surface S11 at 50° to the left and a surface S12 at 50° to the right in the horizontal direction. Here, each of the surfaces S11 and S12 is parallel to the second direction D2 and forms an angle of 50° with the half line A0 in a plan view from the second direction D2. In other words, in a plan view from the second direction D2, the angle formed by the line segment connecting the light source 11 of the lighting fixture 1 and the half line A0 is 50° or less. For example, when the light source 11 of the lighting fixture 1 is located within the induction field R2, the light source 11 of the lighting fixture 1 is located in a region R21 of the induction field R2 that is located between the surfaces S11 and S12. Furthermore, when the light source 11 of the lighting fixture 1 is located within the auxiliary field R3, the light source 11 of the lighting fixture 1 is located in a region R31 of the auxiliary field R3 that is located between the surfaces S11 and S12. This allows the light source 11 of the lighting fixture 1 to be installed in front of the chair 2, making it possible to design a space including the lighting fixture 1 and the chair 2 compactly.

[0058] As a second specific example of the third embodiment, light source 11 of lighting device 1 is located to the left of plane S11 in the horizontal direction or to the right of plane S12, which is 50° to the right. In other words, in a plan view from second direction D2, the angle between half line A0 and a line segment connecting light source 11 of lighting device 1 is greater than 50°. For example, when light source 11 of lighting device 1 is located within induction field R2, light source 11 of lighting device 1 is located in region R22 of induction field R2, which is not between plane S11 and plane S12. Furthermore, when light source 11 of lighting device 1 is located within auxiliary field R3, light source 11 of lighting device 1 is located in region R32 of auxiliary field R3, which is not between plane S11 and plane S12. This allows light source 11 of lighting fixture 1 to be installed to the left and right of chair 2, making it easy to arrange light source 11 of lighting fixture 1 in region R22 or region R32 even if the distance between light source 11 of lighting fixture 1 and upper center 211 of backrest 21 of chair 2 is short. Therefore, it is possible to reduce the space including lighting fixture 1 and chair 2 in the front-to-back direction.

[0059] In a third specific example according to the third embodiment, light sources 11 of lighting fixture 1 are disposed at the positions of light sources 11 of lighting fixture 1 in the first specific example and in the second specific example. Lighting fixture 1 in the first specific example corresponds to the first lighting fixture of the present disclosure. Lighting fixture 1 in the second specific example corresponds to the second lighting fixture of the present disclosure.

[0060] 2. Effects In lighting system 100 according to embodiment 3, in a plan view from second direction D2 that is orthogonal to both first direction D1 and the left-right direction, the angle between half line A0 and a line segment connecting light source 11 of lighting fixture 1 and upper center 211 of backrest 21 is 50° or less. This allows light source 11 of lighting fixture 1 to be installed in front of chair 2, making it possible to design a compact space including lighting fixture 1 and chair 2.

[0061] Furthermore, lighting system 100 according to the fourth embodiment further includes lighting fixture 1. In a plan view from second direction D2, which is orthogonal to both first direction D1 and the left-right direction, the angle between half line A0 and a line segment connecting light source 11 of lighting fixture 1 and upper center 211 of backrest 21 is greater than 50°. As a result, light source 11 of lighting fixture 1 is disposed on both the front and side of chair 2, thereby improving the sleep-inducing and relaxing effects on user P1.

[0062] Furthermore, in lighting system 100 according to embodiment 3, in a plan view from second direction D2 that is orthogonal to both first direction D1 and the left-right direction, the angle between half line A0 and a line segment connecting light source 11 of lighting fixture 1 and upper center 211 of backrest 21 is greater than 50°. This allows light source 11 of lighting fixture 1 to be installed to the side of chair 2, thereby making it possible to reduce the space including lighting fixture 1 and chair 2 in the front-to-back direction.

[0063] 7 , in a lighting system 100 according to a fourth embodiment, a lighting fixture 1 includes a light-blocking member 12 that covers a portion of a light source 11. The light source 11 and the light-blocking member 12 are located within an induced field R2 that includes half lines LB1 and LB2 as its outer edges. The light-blocking member 12 blocks direct light emitted by the light source 11 and indirect light from within the induced field R2 from reaching the upper center 211 of the backrest 21. The lighting fixture 1 is, for example, a so-called cornice lighting fixture that illuminates a wall surface.

[0064] In the lighting system 100 according to the fourth embodiment, as shown in FIG. 7 , the light source 11 is located within the induction field R2. However, the light that directly reaches the user P1 from the light source 11 is blocked by the light blocking member 12, and therefore the light is not visible to the user P1. Furthermore, with regard to indirect light emitted from the light source 11 as a light source, the indirect light emitted from within the induction field R2 is not visible to the user P1. On the other hand, the area 13 that is located outside the induction field R2 and illuminated by the light source 11 is visible to the user P1. In other words, in the lighting system 100 according to the fourth embodiment, the area 13 illuminated by the light source 11 of the lighting fixture 1, which is indirect lighting, is located outside the induction field R2, similar to the light source 11 of the lighting system 100 according to the first embodiment. In the lighting system 100 according to the fourth embodiment, the light source 11 of the lighting fixture 1 may be located anywhere as long as it is not directly visible to the user P1.

[0065] In addition, in the auxiliary visual field R3 outside the induced visual field R2 and including the half lines LC1 and LC2 as the outer edge, when the influence of external light is present, the luminance is 100 cd / m ２ Below, when there is no influence of external light, the brightness is 50 cd / m ２ As in the first embodiment, the following is preferable.

[0066] In the lighting system 100 according to the fourth embodiment, the light source 11 of the lighting fixture 1 is disposed within the induced visual field R2, while the light blocking member 12 covers the light source 11 so that the light emitted from the light source 11 does not enter the induced visual field R2 of the user P1. Therefore, the light source 11 can be disposed in a position directly in front of the user P1 without impairing the sleep-inducing effect and relaxation effect on the user P1.

[0067] In the lighting system 100 according to the fourth embodiment, the light source 11 of the lighting fixture 1 is disposed within the guidance field R2. However, the light source 11 of the lighting fixture 1 may be disposed within the effective field R1, which includes the half lines LA1 and LA2 as its outer edges. In this case, the light blocking member 12 blocks at least direct light and indirect light from within the effective field R1 from reaching the upper center 211 of the backrest 21, among the light emitted by the light source 11. The light blocking member 12 may also block indirect light from within the guidance field R2 from reaching the upper center 211 of the backrest 21. (Fifth Embodiment) 1. Configuration In the lighting system 100 according to the fifth embodiment, the chair 2 has a headrest 213. More specifically, as shown in FIG. 8 , the backrest 21 of the chair 2 has a main body 212 and a headrest 213.

[0068] When the backrest 21 of the chair 2 includes a headrest 213, the upper center 211 of the backrest 21 is the upper center 211 of the headrest 213. In other words, the upper center 211 of the headrest 213 corresponds to the reference point. Furthermore, the normal direction of the backrest 21 at the upper center 211 of the backrest 21 is the normal direction D11 of the headrest 213. As a result, in a chair 2 that has a headrest 213, the posture of the user P1 can be predicted more accurately by using the headrest 213 as a reference.

[0069] Here, when the head of user P1 is not in contact with the main body 212 of the backrest 21 but is in contact with the headrest 213, the line of sight of user P1 is located on a half line A0 extending from the upper center 211 of the headrest 213 in the normal direction D11 of the headrest 213. On the other hand, when the head of user P1 is in contact with both the headrest 213 and the main body 212, the line of sight of user P1 is located on a half line A1 extending from the upper center 211 of the headrest 213 in the normal direction D12 of the main body 212, or on a half line A2 located between the half lines A0 and A1.

[0070] Therefore, in lighting system 100 according to embodiment 5, when the extension direction of an arbitrary half-ray A2 located between half-ray A0 and half-ray A1 is defined as the line of sight of user P1, light source 11 of lighting device 1 is arranged so as to satisfy any of the requirements of embodiments 1 to 4. That is, for example, when light source 11 is below upper center 211 of headrest 213 and outside induced field of view R2, the angle between half-ray A2 and the line segment connecting upper center 211 of headrest 213 and light source 11 is greater than 50°. As a result, lighting system 100 according to embodiment 5 can exert a sleep-inducing effect and a relaxing effect on user P1 even when the direction of the line of sight varies depending on the physique of user P1.

[0071] 2. Effects In the lighting system 100 according to the fifth embodiment, the backrest 21 of the chair 2 includes a headrest 213. The upper center 211 of the backrest 21 is the upper center 211 of the headrest 213. As a result, in the chair 2 having the headrest 213, the posture of the user P1 can be predicted more accurately by using the headrest 213 as a reference.

[0072] Sixth Embodiment In a lighting system 100 according to a sixth embodiment, a position other than the center 211 of the top end of the backrest 21 is set as the starting position of the viewpoint of the user P1, and the light source 11 of the lighting fixture 1 is disposed at this position.

[0073] 9, the eye position P11 of the user P1 is located further forward of the backrest 21 than the upper center 211 of the backrest 21. The distance d3 between the eye position P11 of the user P1 and the upper center 211 of the backrest 21 is 250 mm or less, for example, 200 mm.

[0074] In the lighting system 100 according to the sixth embodiment, a ray A0 extending from the eye position P11 of the user P1 in the normal direction D12 of the backrest 21 is defined as the line of sight of the user P1. That is, the eye position P11 of the user P1 corresponds to the reference point. That is, the outer edge of the effective visual field R1, which includes the ray LA1 and LA2, has the eye position P11 of the user P1 as its vertex. Similarly, the outer edge of the induction visual field R2, which includes the ray LB1 and LB2, has the eye position P11 of the user P1 as its vertex. Similarly, the outer edge of the auxiliary visual field R3, which includes the ray LC1 and LC2, has the eye position P11 of the user P1 as its vertex.

[0075] This allows the light source 11 to be positioned to better match the visual field characteristics of the user P1. Also, even if the position of the top end of the backrest 21 or the top end of the headrest 213 is different from the eye height of the user P1, for example, if the top end of the backrest 21 is at the neck height of the user P1 or if the top end of the headrest 213 is higher than the zenith of the head of the user P1, the light source 11 can be positioned appropriately.

[0076] (Other Modifications of the Embodiments) (1) In the lighting systems 100 according to the first to sixth embodiments, the chair 2 is a reclining seat in which the angle a1 of the backrest 21 can be freely changed, but the chair 2 may be one in which the angle a1 of the backrest 21 can be changed in stages, allowing one to be selected from a plurality of options. Also, the chair 2 may be one in which the angle a1 of the backrest 21 cannot be changed.

[0077] Furthermore, in the first embodiment, the light source 11 of the lighting device 1 is outside the effective visual field R1 or outside the induced visual field R2 over the entire range of the angle a1 of the backrest 21. However, for example, depending on the angle a1 of the backrest 21, the light source 11 of the lighting device 1 may be outside the induced visual field R2 or inside the effective visual field R1. For example, if the driver's seat of a passenger vehicle is a chair 2, the light source 11 of the lighting device 1 may be outside the induced visual field R2 when the angle a1 of the backrest 21 is 10° or less, and may be inside the effective visual field R1 when the angle a1 of the backrest 21 is 50° or more. This allows the driver to relax when the seat is reclined, while also allowing the driver to be appropriately tense while driving.

[0078] (2) Although the lighting system 100 according to the third embodiment includes a plurality of lighting fixtures 1 in the third specific example, a single lighting fixture 1 may include a plurality of light sources 11 .

[0079] (3) In lighting system 100 according to embodiment 1, light source 11 of lighting fixture 1 is outside effective field of view R1 or outside induced field of view R2 across the entire range of angle a1 of backrest 21. However, for example, lighting system 100 may be configured such that light source 11 of first lighting fixture 1 is located outside induced field of view R2 when backrest 21 angle is 60°, and light source 11 of second lighting fixture 1 is located outside induced field of view R2 when backrest 21 angle is 0°. In this case, first lighting fixture 1 corresponds to the lighting fixture of the present disclosure when backrest 21 angle is 60°, and second lighting fixture 1 corresponds to the lighting fixture of the present disclosure when backrest 21 angle is 0°. In this case, lighting system 100 may further include control device 15, which may switch lighting fixture 1 to be turned on depending on the angle of backrest 21 of chair 2.

[0080] (4) The above-described embodiments and modifications are merely a part of the various embodiments and modifications of the present invention. Furthermore, the embodiments and modifications can be modified in various ways depending on the design, etc., as long as the object of the present invention can be achieved. Furthermore, one embodiment and another embodiment, or one embodiment and one modification, or one modification and another modification may be combined as appropriate.

[0081] (Aspect) A lighting system (100) according to a first aspect includes a chair (2) and a lighting fixture (1). The chair (2) has a backrest (21). The lighting fixture (1) has a light-emitting unit (11; 13). When the angle (a1) of the backrest (21) of the chair (2) is a predetermined angle, a half-line (LA1) extends from the reference point (211; P11) at the upper end center (211) of the backrest (21) toward the front of the backrest (21) and forms an angle of 8° upward with respect to a first direction (D1) that is the normal direction of the backrest (21) at the reference point (211; P11). A half-line (LA1) extends from the reference point (211; P11) in a direction that forms an angle of 8° upward with respect to a first direction (D1). A half-line (LA2) extends from the reference point (211; P11) in a direction that forms an angle of 8° downward with respect to the first direction (D1). The light-emitting unit (11) of the lighting device (1) is disposed outside a first region (R1) including, as outer edges, a half-line (LA2) extending from the reference point (211; P11) in a direction forming an angle of 12° to the right with respect to the first direction (D1), a half-line (LA2) extending from the reference point (211; P11) in a direction forming an angle of 15° to the right with respect to the first direction (D1), and a half-line (LA2) extending from the reference point (211; P11) in a direction forming an angle of 15° to the left with respect to the first direction (D1). When the angle (a1) of the backrest (21) of the chair (2) is a predetermined angle, the distance between the light-emitting unit (11) of the lighting device (1) and the reference point (211; P11) is 500 mm or more.

[0082] According to the lighting system (100) of the above aspect, the user who is naturally seated in the chair (2) is able to reduce the high-performance information reception of the light emitted from the light source (11), and the lighting device (1) can exert a relaxing effect and a sleep-inducing effect on the user.

[0083] In the lighting system (100) according to the second aspect, when the angle of the backrest (21) of the chair (2) in the first aspect is a predetermined angle, a half line (LB1) extending from the reference point (211; P11) to the front side of the backrest (21) and forming an angle of 35° upward with respect to the first direction (D1), and a half line (LB2) extending from the reference point (211; P11) in a direction forming an angle of 50° downward with respect to the first direction (D1) are provided. The light-emitting portion (11; 13) of the lighting device (1) is arranged at a position outside a second region (R2) that includes as its outer edges a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° to the right with respect to the first direction (D1), a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° to the left with respect to the first direction (D1), and the half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° to the left with respect to the first direction (D1).

[0084] The lighting system (100) according to the above aspect can further reduce the high-performance information reception of light emitted from the light source (11) by a user who is naturally seated in a chair (2), thereby enhancing the relaxation and sleep-inducing effects of the lighting device (1) on the user.

[0085] In the lighting system (100) according to the third aspect, in the first or second aspect, the light-emitting portion (11; 13) of the lighting device (1) is arranged below a half line (A0) extending from the reference point (211; P11) in a first direction (D1).

[0086] According to the lighting system (100) of the above aspect, when the backrest (21) of the chair (2) is reclining, it becomes easy to position the light source (11) outside the first region (R1) or outside the second region (R2) regardless of the angle (a1) of the backrest (21) of the chair (2).

[0087] In the lighting system (100) according to the fourth aspect, in any of the first to third aspects, a region (R 1 ) is provided which includes, as outer edges thereof, a half line (LB1) extending from the reference point (211; P11) in a direction that forms an angle of 35° upward with respect to the first direction (D1), a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° downward with respect to the first direction (D1), a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° right with respect to the first direction (D1), and a half line (LB3) extending from the reference point (211; P11) in a direction that forms an angle of 50° left with respect to the first direction (D1). 2), and is a region extending from the reference point (211; P11) to the front side of the backrest (21), and the luminance is 100 cd / m within a region (R3) including as outer edges a half line (LC1) extending from the reference point (211; P11) in a direction forming 50° upward with respect to the first direction (D1), a half line (LC2) extending from the reference point (211; P11) in a direction forming 75° downward with respect to the first direction (D1), a half line (LC2) extending from the reference point (211; P11) in a direction forming 100° to the right with respect to the first direction (D1), and a half line (LC2) extending from the reference point (211; P11) in a direction forming 100° to the left with respect to the first direction (D1). ２ The following is the result.

[0088] According to the lighting system (100) of the above aspect, it is possible to reduce the possibility that the light emitted by the light-emitting unit (11; 13) of the lighting device (1) will interfere with the relaxation effect and sleep-inducing effect on the user.

[0089] In the lighting system (100) according to the fifth aspect, in any of the first to third aspects, the lighting system (100) extends from the reference point (211; P11) to the front side of the backrest (21), and is outside a region (R2) that includes as outer edges a half line (LB1) extending from the reference point (211; P11) in a direction that forms an angle of 35° upward with respect to the first direction (D1), a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° downward with respect to the first direction (D1), a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° right with respect to the first direction (D1), and a half line extending from the reference point (211; P11) in a direction that forms an angle of 50° left with respect to the first direction (D1), and The luminance of the light-emitting portion (11; 13) of the lighting device (1) is 10 cd / m² when the light-emitting portion (11; 13) is not luminous. ... ２ and the luminance when the light-emitting unit (11; 13) of the lighting device (1) is emitting light is 50 cd / m ２ is.

[0090] According to the lighting system (100) of the above aspect, it is possible to reduce the possibility that the light emitted by the light-emitting unit (11) of the lighting device (1) interferes with the relaxation effect and sleep-inducing effect on the user.

[0091] In the lighting system (100) according to the sixth aspect, in any of the first to fifth aspects, the optical axis of the light emitted from the light-emitting unit (11; 13) of the lighting device (1) does not pass through an area with a radius of 250 mm centered on the reference point (211; P11).

[0092] According to the lighting system (100) of the above aspect, it is possible to prevent light emitted from the light-emitting unit (11; 13) of the lighting device (1) from reaching the eyes of the user directly.

[0093] In a lighting system (100) according to a seventh aspect, in any one of the first to third aspects, the intensity of light emitted from the light-emitting unit (11; 13) is changed. The lighting system (100) according to a seventh aspect is configured to change the intensity of light emitted from the light-emitting unit (11; 13). The lighting system (100) according to a seventh aspect is configured to change the intensity of light emitted from the light-emitting unit (11; 13). The lighting system (100) according to a seventh aspect extends from a reference point (211; P11) to the front side of the backrest (21), and is outside a region (R2) including as outer edges thereof a half-ray (LB1) extending from the reference point (211; P11) in a direction that forms an angle of 35° upward with respect to a first direction (D1), a half-ray (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° downward with respect to the first direction (D1), a half-ray (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° rightward with respect to the first direction (D1), and a half-ray (LB3) extending from the reference point (211; P11) in a direction that forms an angle of 50° leftward with respect to the first direction (D1). The maximum luminance value is 100 cd / m within a region (R3) extending from the reference point (211; P11) to the front side of the backrest (21), the region (R3) including, as outer edges, a half line (LC1) extending from the reference point (211; P11) in a direction forming 50° upward with respect to the first direction (D1), a half line (LC2) extending from the reference point (211; P11) in a direction forming 75° downward with respect to the first direction (D1), a half line (LC2) extending from the reference point (211; P11) in a direction forming 100° to the right with respect to the first direction (D1), and a half line (LC2) extending from the reference point (211; P11) in a direction forming 100° to the left with respect to the first direction (D1). ２ The following is the result.

[0094] The lighting system (100) according to the above aspect can reduce the possibility that the light emitted by the light-emitting unit (11; 13) of the lighting device (1) interferes with the sleep-inducing effect. Also, by changing the light intensity of the light-emitting unit (11; 13) of the lighting device (1), it is possible to enhance the relaxation effect.

[0095] In the lighting system (100) according to the eighth aspect, in any one of the first to third aspects, the intensity of the light emitted from the light emitting unit (11; 13) is changed. The area (R2) extends from the reference point (211; P11) to the front side of the backrest (21), and is outside the area (R2) including as outer edges thereof a half line (LB1) extending from the reference point (211; P11) in a direction that forms an angle of 35° upward with respect to the first direction (D1), a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° downward with respect to the first direction (D1), a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° right with respect to the first direction (D1), and a half line (LB3) extending from the reference point (211; P11) in a direction that forms an angle of 50° left with respect to the first direction (D1), and is outside the area (R2) including as outer edges thereof a half line (LB1) extending from the reference point (211; P11) to the front side of the backrest (21), and is outside the area (R2) including as outer edges thereof a half line (LB2) extending from the reference point (211; P11) in a direction that forms an angle of 50° ), and the luminance when the light-emitting section (11; 13) of the lighting device (1) is not emitting light is 10 cd / m inside a region (R3) including as outer edges a half-ray (LC1) extending from the reference point (211; P11) in a direction forming 50° upward with respect to the first direction (D1), a half-ray (LC2) extending from the reference point (211; P11) in a direction forming 75° downward with respect to the first direction (D1), a half-ray (LC2) extending from the reference point (211; P11) in a direction forming 100° to the right with respect to the first direction (D1), and a half-ray (LC2) extending from the reference point (211; P11) in a direction forming 100° to the left with respect to the first direction (D1). ２ and the luminance when the light-emitting unit (11; 13) of the lighting device (1) is emitting light is 50 cd / m ２ is.

[0096] The lighting system (100) according to the above aspect can reduce the possibility that the light emitted by the light-emitting unit (11; 13) of the lighting device (1) interferes with the sleep-inducing effect. Also, by changing the light intensity of the light-emitting unit (11; 13) of the lighting device (1), it is possible to enhance the relaxation effect.

[0097] In the lighting system (100) according to the ninth aspect, in any of the first to eighth aspects, in a planar view from a second direction (D2) perpendicular to both the first direction (D1) and the left-right direction, the angle formed by a line segment connecting the light-emitting portion (11; 13) of the lighting device (1) and the reference point (211; P11) and a half-line (A0) extending from the reference point (211; P11) in the first direction (D1) is 50° or less.

[0098] According to the lighting system (100) of the above aspect, the light-emitting unit (11; 13) of the lighting device (1) can be installed in front of the chair (2), making it possible to design a compact space including the lighting device (1) and the chair (2).

[0099] A lighting system (100) according to a tenth aspect is the lighting system (100) of the ninth aspect, further comprising a second lighting fixture (1) different from the first lighting fixture (1). The second lighting fixture (1) comprises a second light-emitting unit (11; 13) different from the first light-emitting unit (11; 13). In a plan view from a second direction (D2) perpendicular to both the first direction (D1) and the left-right direction, the angle formed by a line segment connecting the second light-emitting unit (11; 13) of the second lighting fixture (1) to a reference point (211; P11) and a half line (A0) extending from the reference point (211; P11) in the first direction (D1) is greater than 50°.

[0100] According to the lighting system (100) of the above aspect, the light-emitting portions (11; 13) of the lighting device (1) are arranged on both the front and sides of the chair (2), thereby improving the sleep-inducing effect and relaxation effect.

[0101] In the lighting system (100) according to the eleventh aspect, in any of the first to eighth aspects, in a planar view from a second direction (D2) perpendicular to both the first direction (D1) and the left-right direction, the angle formed by the line segment connecting the light-emitting portion (11; 13) of the lighting device (1) and the reference point (211; P11) and a half-line (A0) extending from the reference point (211; P11) in the first direction (D1) is greater than 50°.

[0102] According to the lighting system (100) of the above aspect, the light source unit (11; 13) of the lighting device (1) can be installed on the side of the chair (2), so that the space including the lighting device (1) and the chair (2) can be made smaller in the front-to-back direction.

[0103] In the lighting system (100) according to the twelfth aspect, in any one of the first to eleventh aspects, the backrest (21) of the chair (2) includes a headrest (213). The reference point (211) is the center (211) of the top edge of the headrest (213).

[0104] According to the lighting system (100) of the above aspect, in a chair (2) having a headrest (213), the posture of the user can be predicted more accurately by using the headrest (213) as a reference.

[0105] A lighting device (1) according to a thirteenth aspect is used in a lighting system (100) including a chair (2) having a backrest (21). The lighting device (1) has a light-emitting unit (11; 13). When the angle (a1) of the backrest (21) of the chair (2) is a predetermined angle, a half-line (LA1) extends from the reference point (211; P11) at the upper end center (211) of the backrest (21) toward the front side of the backrest (21) and forms an angle of 8° upward with respect to a first direction (D1) that is the normal direction of the backrest (21) at the reference point (211; P11). A half-line (LA1) extends from the reference point (211; P11) in a direction that forms an angle of 8° upward with respect to a first direction (D1). A half-line (LA2) extends from the reference point (211; P11) in a direction that forms an angle of 8° downward with respect to the first direction (D1). The light-emitting unit (11) of the lighting device (1) is disposed outside a first region (R1) including, as outer edges, a half-line (LA2) extending from the reference point (211; P11) in a direction forming an angle of 12° to the right with respect to the first direction (D1), a half-line (LA2) extending from the reference point (211; P11) in a direction forming an angle of 15° to the right with respect to the first direction (D1), and a half-line (LA2) extending from the reference point (211; P11) in a direction forming an angle of 15° to the left with respect to the first direction (D1). When the angle (a1) of the backrest (21) of the chair (2) is a predetermined angle, the distance between the light-emitting unit (11) of the lighting device (1) and the reference point (211; P11) is 500 mm or more.

[0106] The lighting device (1) according to the above aspect reduces the high-performance information reception of light emitted from the light source (11) by a user who is naturally seated in a chair (2), and can provide a relaxation effect and a sleep-inducing effect to the user.

[0107] A lighting control system (10) according to a fourteenth aspect includes the lighting device (1) according to the thirteenth aspect and a control device (15). The control device (15) controls the lighting device (1).

[0108] According to the lighting control system (10) of the above aspect, it is possible to control the lighting device (1) so that the light emitted from the light-emitting unit (11) of the lighting device (1) has a relaxing effect and a sleep-inducing effect.

[0109] 100 Lighting system 10 Lighting control system 1 Lighting fixture 11 Light source (light-emitting unit) 13 Area (light-emitting unit) 15 Control device 2 Chair 21 Backrest 211 Center of top edge (reference point) 213 Headrest a1 Angle P11 Eye position (reference point) D1 First direction D2 Second direction A0; LA1, LA2, LB1, LB2, LC1, LC2 Half line R1 Effective visual field (first area) R2 Induced visual field (second area, area) R3 Auxiliary visual field (area)

Claims

1. A lighting system comprising: a chair with a backrest; and a lighting fixture having a light-emitting unit, wherein, when the angle of the backrest of the chair is a predetermined angle, the light-emitting unit of the lighting fixture is disposed at a position outside a first area that extends from the center of the upper end of the backrest, which is a reference point, to the front side of the backrest, and includes as outer edges a half-line extending from the reference point in a direction that forms 8° upward with respect to a first direction that is the normal direction of the backrest at the reference point, a half-line extending from the reference point in a direction that forms 12° downward with respect to the first direction, a half-line extending from the reference point in a direction that forms 15° to the right with respect to the first direction, and a half-line extending from the reference point in a direction that forms 15° to the left with respect to the first direction, and the distance between the light-emitting unit of the lighting fixture and the reference point is 500 mm or more.

2. The lighting system of claim 1, wherein, when the angle of the backrest of the chair is the specified angle, the light-emitting unit of the lighting fixture is positioned at a position outside a second region that extends from the reference point to the front side of the backrest and includes as outer edges a half line extending from the reference point in a direction forming 35° upward with respect to the first direction, a half line extending from the reference point in a direction forming 50° downward with respect to the first direction, a half line extending from the reference point in a direction forming 50° to the right with respect to the first direction, and a half line extending from the reference point in a direction forming 50° to the left with respect to the first direction.

3. The lighting system according to claim 1 or 2, wherein the light-emitting portion of the lighting device is disposed below a half line extending from the reference point in the first direction.

4. The seat back is outside an area including, as outer edges, a half line extending from the reference point in a direction that forms an angle of 35° upward with respect to the first direction, a half line extending from the reference point in a direction that forms an angle of 50° downward with respect to the first direction, a half line extending from the reference point in a direction that forms an angle of 50° to the right with respect to the first direction, and a half line extending from the reference point in a direction that forms an angle of 50° to the left with respect to the first direction, and the half line extending from the reference point in a direction that forms an angle of 50° to the left with respect to the first direction. a luminance of 100 cd / m2 or less is achieved within an area extending toward the front side of the backrest, the area including, as outer edges, a half line extending from the reference point in a direction that forms 50° upward with respect to the first direction, a half line extending from the reference point in a direction that forms 75° downward with respect to the first direction, a half line extending from the reference point in a direction that forms 100° to the right with respect to the first direction, and a half line extending from the reference point in a direction that forms 100° to the left with respect to the first direction. ２ 4. The lighting system according to claim 1 , wherein:

5. a half-line extending from the reference point to the front side of the backrest, the half-line extending from the reference point in a direction forming 35° upward with respect to the first direction, the half-line extending from the reference point in a direction forming 50° downward with respect to the first direction, the half-line extending from the reference point in a direction forming 50° to the right with respect to the first direction, and the half-line extending from the reference point in a direction forming 50° to the left with respect to the first direction, and the half-line extending from the reference point in a direction forming 50° to the left with respect to the first direction, the half-line extending from the reference point to the front side of the backrest, the half-line extending from the reference point to the direction forming 50° upward with respect to the first direction, the half-line extending from the reference point in a direction forming 75° downward with respect to the first direction, the half-line extending from the reference point in a direction forming 100° to the right with respect to the first direction, and the half-line extending from the reference point in a direction forming 100° to the left with respect to the first direction, When the light-emitting portion of the lighting device does not emit light, the luminance is 10 cd / m ２ and the luminance when the light-emitting portion of the lighting device is emitting light is 50 cd / m ２ 4. The lighting system according to claim 1 , wherein:

6. The lighting system according to any one of claims 1 to 5, wherein the optical axis of the light emitted from the light-emitting unit of the lighting fixture does not pass through an area with a radius of 250 mm centered on the reference point.

7. Changing the light intensity emitted from the light emitting unit, the light emitting unit is outside a region including, as outer edges, a half line extending from the reference point to the front side of the backrest, a half line extending from the reference point in a direction that forms an angle of 35° upward with respect to the first direction, a half line extending from the reference point in a direction that forms an angle of 50° downward with respect to the first direction, a half line extending from the reference point in a direction that forms an angle of 50° to the right with respect to the first direction, and a half line extending from the reference point in a direction that forms an angle of 50° to the left with respect to the first direction, and the light emitting unit is outside a region including, as outer edges, a half line extending from the reference point to the front side of the backrest, the half line extending from the reference point in a direction that forms an angle of 35° upward with respect to the first direction, a half line extending from the reference point in a direction that forms an angle of 50° downward with respect to the first direction, and a half line extending from the reference point in a direction that forms an angle of 50° left with respect to the first direction, a region extending toward the front side of the seat back, the region including as its outer edges a half line extending from the reference point in a direction that forms 50° upward with respect to the first direction, a half line extending from the reference point in a direction that forms 75° downward with respect to the first direction, a half line extending from the reference point in a direction that forms 100° to the right with respect to the first direction, and a half line extending from the reference point in a direction that forms 100° to the left with respect to the first direction, the maximum luminance value being 100 cd / m ２ 4. The lighting system according to claim 1 , wherein:

8. Changing the intensity of light irradiated from the light emitting unit; a half-line extending from the reference point to the front side of the backrest, the half-line extending from the reference point in a direction forming 35° upward with respect to the first direction, the half-line extending from the reference point in a direction forming 50° downward with respect to the first direction, the half-line extending from the reference point in a direction forming 50° to the right with respect to the first direction, and the half-line extending from the reference point in a direction forming 50° to the left with respect to the first direction, and the half-line extending from the reference point in a direction forming 50° to the left with respect to the first direction, the half-line extending from the reference point to the front side of the backrest, the half-line extending from the reference point to the direction forming 50° upward with respect to the first direction, the half-line extending from the reference point in a direction forming 75° downward with respect to the first direction, the half-line extending from the reference point in a direction forming 100° to the right with respect to the first direction, and the half-line extending from the reference point in a direction forming 100° to the left with respect to the first direction, When the light-emitting portion of the lighting device does not emit light, the luminance is 10 cd / m ２ and the maximum luminance when the light-emitting portion of the lighting device is emitting light is 50 cd / m ２ 4. The lighting system according to claim 1 , wherein:

9. A lighting system as described in any one of claims 1 to 8, wherein, in a planar view from a second direction perpendicular to both the first direction and the left-right direction, an angle formed by a line segment connecting the light-emitting portion of the lighting device and the reference point and a half line extending from the reference point in the first direction is 50° or less.

10. The lighting system of claim 9, further comprising a second lighting fixture different from the first lighting fixture, the second lighting fixture comprising a second light-emitting unit different from the first light-emitting unit, and in a planar view from the second direction, an angle formed by a line segment connecting the second light-emitting unit of the second lighting fixture and the reference point and a half-line extending from the reference point in the first direction is greater than 50°.

11. A lighting system as described in any one of claims 1 to 8, wherein, in a planar view from a second direction perpendicular to both the first direction and the left-right direction, an angle between a line segment connecting the light-emitting portion of the lighting device and the reference point and a half line extending from the reference point in the first direction is greater than 50°.

12. The lighting system according to any one of claims 1 to 11, wherein the back of the chair includes a headrest, and the reference point is the centre of the top edge of the headrest.

13. A lighting fixture used in a lighting system including a chair with a backrest, the lighting fixture comprising a light-emitting unit, when the angle of the backrest of the chair is a predetermined angle, the light-emitting unit of the lighting fixture is disposed at a position outside a first area that extends from the center of the upper end of the backrest, which is a reference point, to the front side of the backrest, and includes as outer edges a half-line extending from the reference point in a direction that forms 8° upward with respect to a first direction that is the normal direction of the backrest at the reference point, a half-line extending from the reference point in a direction that forms 12° downward with respect to the first direction, a half-line extending from the reference point in a direction that forms 15° to the right with respect to the first direction, and a half-line extending from the reference point in a direction that forms 15° to the left with respect to the first direction, and the distance between the lighting fixture and the reference point is 500 mm or more.

14. A lighting control system comprising: a lighting device according to claim 13; and a control device for controlling the lighting device.

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