Lighting system, control device and control method

Abstract

This invention provides a lighting system, a control device, and a control method that can improve relaxation effects. The lighting system (1) includes a light-emitting unit (21) and a control unit (11). The control unit controls the light-emitting unit. A first period during which the light intensity of the light-emitting unit is controlled by the control unit includes a second period during which the light intensity of the light-emitting unit is controlled based on a light output pattern. Regarding the light intensity of the light-emitting unit controlled by the control unit, during the second period, the component intensity of light components with a frequency greater than 1 Hz is less than 5% of the maximum value of the component intensity of light components with a frequency less than 1 Hz. The second period includes at least a third period. Regarding the light intensity of the light-emitting unit controlled by the control unit, the maximum value (Lmax) of the light intensity of the light-emitting unit during the third period, relative to the minimum value (Lmin) of the light intensity of the light-emitting unit during the third period, satisfies the relationship: 2 ≤ Lmax / Lmin ≤ 10.

Description

Technical Field

[0001] This disclosure relates to a lighting system, control device, and control method, and more particularly to a lighting system, control device, and control method for controlling a light-emitting part. Background Technology

[0002] Japanese Patent Publication No. 2015-46334 (hereinafter referred to as "Document 1") discloses a lighting device (lighting system) that can achieve a relaxing effect through fluctuations in color and brightness.

[0003] The lighting device disclosed in Document 1 includes a light source (light-emitting unit) and a control device (control unit) for controlling the light source based on a lighting signal. The lighting signal is a composite wave obtained by combining multiple waves with different frequencies. The control device causes the light source to emit light based on a series of repeatedly read lighting signals.

[0004] In the lighting device described in Reference 1, interruptions and color mixing are avoided by using a series of lighting signals where the end of one lighting signal is connected to the beginning of the next. However, depending on the waveform of the lighting signal, sometimes the flickering or fluctuation of the lighting is not easily noticeable, thus failing to achieve a sufficient relaxation effect. Summary of the Invention

[0005] The problem the invention aims to solve

[0006] The purpose of this disclosure is to provide a lighting system, control device, and control method with a high relaxation effect.

[0007] Solution for solving the problem

[0008] One aspect of this disclosure relates to a lighting system comprising a light-emitting unit and a control unit. The light-emitting unit includes a light source. The control unit controls the light-emitting unit. Regarding the light intensity of the light-emitting unit controlled by the control unit, a first period includes a second period. During the first period, the light intensity of the light-emitting unit is controlled by the control unit. During the second period, the light intensity of the light-emitting unit is controlled based on a light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum value of the component intensity of light components with frequencies less than 1 Hz. The second period includes at least a third period. Regarding the light intensity of the light-emitting unit controlled by the control unit, the maximum value Lmax of the light intensity of the light-emitting unit during the third period, relative to the minimum value Lmin of the light intensity of the light-emitting unit during the third period, satisfies the following relationship: 2 ≤ Lmax / Lmin ≤ 10.

[0009] One aspect of the control device disclosed herein includes a control unit. The control unit controls the light output of a light-emitting portion including a light source. Regarding the light intensity of the light-emitting portion controlled by the control unit, a first period includes a second period. During the first period, the control unit controls the light intensity of the light-emitting portion. During the second period, the light intensity of the light-emitting portion is controlled based on a light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum value of the component intensity of light components with frequencies less than 1 Hz. The second period includes at least a third period. Regarding the light intensity of the light-emitting portion controlled by the control unit, the maximum value Lmax of the light intensity of the light-emitting portion during the third period satisfies the following relationship relative to the minimum value Lmin of the light intensity of the light-emitting portion during the third period: 2 ≤ Lmax / Lmin ≤ 10.

[0010] One aspect of this disclosure relates to a control method comprising a control step. In this control step, the light output of a light-emitting portion including a light source is controlled. In this control step, regarding the light intensity of the light output from the light-emitting portion, a first period includes a second period. During the first period, the light intensity of the light-emitting portion is controlled by the control step. During the second period, the light intensity of the light-emitting portion is controlled based on a light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum value of the component intensity of light components with frequencies less than 1 Hz. The second period includes at least a third period. In this control step, regarding the light intensity of the light output from the light-emitting portion, the maximum value Lmax of the light intensity of the light-emitting portion during the third period, relative to the minimum value Lmin of the light intensity of the light-emitting portion during the third period, satisfies the following relationship: 2 ≤ Lmax / Lmin ≤ 10.

[0011] The effects of the invention

[0012] The lighting system, control device, and control method disclosed herein can enhance the relaxation effect. Attached Figure Description

[0013] Figure 1 This is a functional block diagram showing the structure of the lighting system according to Embodiment 1.

[0014] Figure 2 It is a graph showing the waveform of the light output pattern in the light-emitting system.

[0015] Figure 3 It is a graph showing the frequency distribution of the light output pattern in the light-emitting system.

[0016] Figure 4It is a graph showing the waveform of the light output pattern, including a portion of the pattern, in the light-emitting system.

[0017] Figure 5 It is a graph showing the relationship between the fluctuation frequency of the illumination light intensity and the flicker threshold.

[0018] Figure 6 This is a table showing the relationship between the frequency and degree of fluctuation of the light intensity of illumination and the fluctuation sensitivity and discomfort.

[0019] Figure 7 It is a graph showing the frequency distribution of the light output pattern in the light-emitting system according to Embodiment 2.

[0020] Figure 8 It is a graph showing the waveform of the light output pattern in the light-emitting system according to Embodiment 3.

[0021] Figure 9 It is a graph showing the waveform of the light output pattern in the light-emitting system according to Embodiment 4.

[0022] Figure 10 It is a graph showing the waveform of a portion of the light output pattern, i.e., the static pattern, in the light-emitting system involved in the modified example.

[0023] Figure 11 It is a graph showing the waveform of the light output pattern in the light-emitting system according to Embodiment 5.

[0024] Figure 12 It is a graph showing the waveform of the light output pattern in the light-emitting system according to Embodiment 6.

[0025] Figure 13 It is a graph showing the waveform of the light pattern in the light-emitting system according to Embodiment 7.

[0026] Figure 14A This is a schematic diagram showing the conditions for measuring illuminance. Figure 14B This is a top view showing the conditions under which the illuminance was measured. Detailed Implementation

[0027] The lighting system according to the embodiments will now be described with reference to the accompanying drawings.

[0028] (Implementation Method 1)

[0029] 1. Lighting system

[0030] The structure of the lighting system 1 according to Embodiment 1 will be described with reference to the accompanying drawings.

[0031] like Figure 1As shown, the lighting system 1 according to Embodiment 1 includes a control device 10 and a light source device 20.

[0032] 2. Elements of a lighting system

[0033] The constituent elements of the lighting system 1 according to Embodiment 1 will now be described.

[0034] (1) Control device

[0035] like Figure 1 As shown, the control device 10 includes a control unit 11 and a storage unit 12.

[0036] The control unit 11 controls the illumination of the light source device 20. More specifically, the control unit 11 controls, for example, the light-emitting part 21 of the light source device 20, so that the light intensity of the light-emitting part 21 varies according to the light output pattern. The light intensity of the light-emitting part 21 is, for example, the brightness of the light-emitting surface of the light-emitting part 21. The control unit 11 outputs a dimming signal based on the light output pattern to the light source device 20. The dimming signal is, for example, the voltage value applied to the light source of the light-emitting part 21, and is generated by PWM (Pulse Width Modulation) control.

[0037] The light output pattern is, for example, data representing the light intensity of the light-emitting unit 21 over a given time period. The control unit 11 generates the light output pattern, for example, using a partial pattern. The partial pattern is, for example, data representing the light intensity of the light-emitting unit 21 over a finite length period, based on the elapsed time from the beginning of the period.

[0038] Storage unit 12 is a storage medium that stores a portion of the pattern.

[0039] The control device 10 includes a computer system. The computer system is primarily structured with a processor and memory as hardware. The functions of the control device 10 in this disclosure are achieved by the processor executing a program recorded in the computer system's memory. The program can be pre-recorded in the computer system's memory, provided via a telecommunications line, or recorded on a non-transient recording medium such as a memory card, optical disk, or hard disk drive that can be read by the computer system. The processor of the computer system consists of one or more electronic circuits, including semiconductor integrated circuits (ICs) or large-scale integrated circuits (LSIs). The ICs or LSIs referred to herein are named differently depending on their degree of integration, including integrated circuits called system LSIs, VLSIs (Very Large Scale Integration), or ULSIs (Ultra Large Scale Integration). Furthermore, FPGAs (Field-Programmable Gate Arrays) that are programmed after LSI fabrication, or logic devices capable of reconstructing the internal bonding relationships or circuit partitioning within an LSI, can also be used as processors. Multiple electronic circuits can be integrated onto a single chip or distributed across multiple chips. Multiple chips can be integrated into a single device or distributed across multiple devices. The computer system described herein includes a microcontroller having one or more processors and one or more memories. Therefore, a microcontroller also consists of one or more electronic circuits, including semiconductor integrated circuits or large-scale integrated circuits.

[0040] Furthermore, the structure of integrating multiple functions of the control device 10 into a single housing is not a necessary structure for the control device 10; the components of the control device 10 can also be distributed across multiple housings. Moreover, at least some functions of the control device 10, such as a portion of the functions of the control unit 11, can be implemented via the cloud (cloud computing).

[0041] Conversely, in Embodiment 1, at least some of the functions of the control device 10, which are distributed across multiple devices, can also be integrated into a single housing. For example, some of the functions of the control device 10, which are distributed across the control unit 11 and the storage unit 12, can also be integrated into a single housing.

[0042] (2) Light source device

[0043] like Figure 1 As shown, the light source device 20 includes a light-emitting part 21. The light source device 20 is, for example, a so-called ceiling light installed on the ceiling. In addition, the light source device 20 is not limited to a ceiling light, and may also be any lighting device such as a table lamp or spot lighting.

[0044] The light-emitting unit 21 includes a light source. The light source is, for example, an LED light source that emits white light. The light-emitting unit 21 changes the intensity of the output light from the light source based on the control of the control unit 11. For example, the light-emitting unit 21 applies a voltage represented by a dimming signal output by the control unit 11 to the light source to output light.

[0045] 3. Illumination control performed by the control unit

[0046] The control of the light-emitting unit 21 based on the light output pattern will now be explained in more detail.

[0047] (1) Light output pattern and partial output pattern

[0048] Figure 2 This is a graph showing the waveform of the light output pattern 110. As described above, the light output pattern 110 is the value of the light intensity L of the light emitted by the light-emitting unit 21 at each moment.

[0049] In the light output pattern 110, the following relationship holds between the maximum value Lmax of the light intensity L of the light-emitting part 21 and the minimum value Lmin of the light intensity L of the light-emitting part 21.

[0050] 2≤Lmax / Lmin≤10……(Equation 1)

[0051] When the ratio of the maximum value Lmax to the minimum value Lmin of the light intensity L, Lmax / Lmin, is small, the fluctuation of the light intensity L of the light-emitting part 21 may not be noticeable. Therefore, it is preferable that Lmax / Lmin is 2 or more. On the other hand, when Lmax / Lmin is large, the fluctuation of the light intensity L of the light-emitting part 21 will be perceived as flickering, which may sometimes cause discomfort to the viewer. Therefore, in the light output pattern 110, it is preferable that Lmax / Lmin is 10 or less.

[0052] Furthermore, more preferably, the following relationship holds between the maximum value Lmax of the light intensity L of the light-emitting part 21 and the minimum value Lmin of the light intensity L of the light-emitting part 21.

[0053] 3≤Lmax / Lmin≤5……(Equation 2)

[0054] Therefore, fluctuations in the light intensity L of the light-emitting part 21 are easily noticeable. On the other hand, discomfort caused by perceiving fluctuations in the light intensity L of the light-emitting part 21 as flickering can be suppressed. Thus, the relaxation effect brought about by the fluctuations in the light intensity L of the light-emitting part 21 through the lighting system 1 can be further enhanced.

[0055] (2) Frequency of light output pattern

[0056] Figure 3This is a graph showing the frequency distribution 131 of the light output pattern 110. The frequency distribution 131 of the light output pattern 110 shows the component intensity (amplitude of the sine wave) of the sine wave at each frequency when the light output pattern 110 is represented by a synthesis of sine waves. For example, when there is a peak at 0.1 Hz in the frequency distribution 131 of the light output pattern 110, the light output pattern 110 represents a synthesized wave including a sine wave with a frequency of 0.1 Hz. Hereinafter, the peak at a specific frequency in the frequency distribution 131 of the light output pattern 110 is referred to as "the light component of the light output pattern 110 at a specific frequency". In addition, when the frequency distribution 131 of the light output pattern 110 has a peak at a specific frequency, the component intensity of the peak is referred to as "the component intensity of the light component at the specific frequency". The frequency distribution 131 of the light output pattern 110 is obtained by performing a Fourier transform on the frequency function of the light output pattern 110 as a function of time.

[0057] like Figure 3 As shown, the light output pattern 110 includes at least light components with frequencies below 1 Hz. Furthermore, in the light output pattern 110, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum value I1 of the component intensity of light components with frequencies below 1 Hz. Moreover, the maximum value I1 of the component intensity of light components with frequencies below 1 Hz is the maximum value of the component intensity of the peak present in the frequency distribution 131 of the light output pattern 110 within the frequency range below 1 Hz. For example, when there are multiple peaks in the frequency distribution 131 of the light output pattern 110 within the frequency range below 1 Hz, the component intensity of the peak with the largest component intensity is the maximum value I1 of the component intensity of light components with frequencies below 1 Hz. Additionally, when there is only one peak in the frequency distribution 131 of the light output pattern 110 within the frequency range below 1 Hz, the component intensity of that peak is the maximum value I1 of the component intensity of light components with frequencies below 1 Hz. Therefore, in the lighting system 1 according to Embodiment 1, it is possible to suppress the discomfort caused by the perception of fluctuations in the light intensity L of the light-emitting part 21 as flickering, and to obtain the relaxing effect brought about by the fluctuations in the light intensity L of the light-emitting part 21.

[0058] Furthermore, the light output pattern 110 may also exclude light components with frequencies greater than 1 Hz. When the light output pattern 110 excludes light components with frequencies greater than 1 Hz, the intensity of the light components with frequencies greater than 1 Hz is 0. Therefore, the intensity of the light components with frequencies greater than 1 Hz becomes less than 5% of the maximum value I1 of the intensity of light components with frequencies less than 1 Hz.

[0059] Furthermore, in the light output pattern, the peak intensity of the light component with a frequency greater than 0.5 Hz is less than 5% of the maximum value I2 of the component intensity of the light component with a frequency less than 0.5 Hz. Alternatively, the light output pattern may not include light components with a frequency greater than 0.5 Hz. In this case, the component intensity of the light component with a frequency greater than 0.5 Hz is also 0. Therefore, the component intensity of the light component with a frequency greater than 0.5 Hz is naturally less than 5% of the maximum value I2 of the component intensity of the light component with a frequency less than 0.5 Hz. Thus, in the lighting system 1 according to Embodiment 1, discomfort caused by the perception of fluctuations in the light intensity L of the light-emitting part 21 as flicker can be suppressed, and a relaxing effect resulting from fluctuations in the light intensity L of the light-emitting part 21 can be obtained.

[0060] (3) Partial Patterns

[0061] like Figure 4 As shown, the light output pattern 110 includes a partial pattern 111. In the light output pattern 110, the partial pattern 111 is repeated multiple times. More specifically, the partial pattern 111 begins at time T11, and at the end of the partial pattern 111 starting at time T11, i.e., at time T12, the next partial pattern 111 begins. As described above, the partial pattern 111 represents data showing the light intensity of the light-emitting unit 21 over a period P1, calculated as the elapsed time from the beginning of period P1. The duration of period P1 is, for example, 40 seconds.

[0062] (3.1) The beginning and end of some patterns

[0063] The light intensity L1 of the light-emitting part 21 at the beginning of the partial pattern 111 and the light intensity L2 of the light-emitting part 21 at the end of the partial pattern 111 have the following relationship.

[0064] 0.9≤(L1 / L2)≤1.1……(Equation 3)

[0065] Furthermore, at time T12, the end of partial pattern 111 and the beginning of the next partial pattern 111 are sequential in time. Therefore, at time T12, when partial pattern 111 ends and the next partial pattern 111 begins, the light intensity L of the light-emitting portion 21 changes from L2 at the end of partial pattern 111 to L1 at the beginning of partial pattern 111. Therefore, based on the relationship between the light intensity L2 at the end of partial pattern 111 and the light intensity L1 at the beginning of partial pattern 111, the light intensity L of the light-emitting portion 21 may change drastically at time T12. Therefore, it is preferable that the ratio L1 / L2 of the light intensity L1 at the beginning of partial pattern 111 to the light intensity L2 at the end of partial pattern 111 is 0.9 or more and 1.1 or less. Therefore, it is possible to suppress the discomfort caused by the change in light intensity L of the light-emitting part 21 being perceived as flickering at the moment T12 when part pattern 111 ends and the next part pattern 111 begins.

[0066] (3.2) Near the beginning and end of some patterns

[0067] During the beginning-side period P21, where the beginning of the partial pattern 111 is set as the start time T11 and has a predetermined time length, the light intensity L of the light-emitting part 21 has the following relationship with the light intensity L1 of the light-emitting part 21 at the beginning of the partial pattern 111. Furthermore, the duration of the beginning-side period P21, i.e., the predetermined time length, is, for example, 0.5 seconds.

[0068] 0.85≤L / L1≤1.15……(Equation 4)

[0069] That is, during the initial phase P21, the light intensity L of the light-emitting part 21 is more than 0.85 times and less than 1.15 times the light intensity L1 of the light-emitting part 21 at the beginning of the partial pattern 111.

[0070] Furthermore, during the end-side period P22, which is defined as the end time T12 of the partial pattern 111 and has a predetermined time length, the light intensity L of the light-emitting part 21 has the following relationship with the light intensity L2 of the light-emitting part 21 at the end of the partial pattern 111. In addition, the duration of the end-side period P22, i.e., the predetermined time length, is, for example, 0.5 seconds.

[0071] 0.85≤L / L2≤1.15……(Equation 5)

[0072] That is, during the end side period P22, the light intensity L of the light-emitting part 21 is more than 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting part 21 at the end of the partial pattern 111.

[0073] As described above, at time T12, the end of partial pattern 111 and the beginning of the next partial pattern 111 are sequential in time. Therefore, if the degree of change of the light intensity L of the light-emitting part 21 is different during the end-side period P22 and the beginning-side period P21, then at time T12, the degree of change of the light intensity L of the light-emitting part 21 will vary, and sometimes the change of the light intensity L of the light-emitting part 21 at time T12 will be perceived as flickering.

[0074] In contrast, in the light output pattern 110 according to Embodiment 1, during the end-side period P22, the difference between the light intensity L of the light-emitting portion 21 and the light intensity L2 of the light-emitting portion 21 at the end of the partial pattern 111 is within 15% of the light intensity L2. Similarly, during the beginning-side period P21, the difference between the light intensity L of the light-emitting portion 21 and the light intensity L1 of the light-emitting portion 21 at the beginning of the partial pattern 111 is within 15% of the light intensity L1. Therefore, the degree of change of the light intensity L of the light-emitting portion 21 is the same during the end-side period P22 and the beginning-side period P21, and the degree of change is small. Thus, in the lighting system 1 according to Embodiment 1, the variation in the degree of change of the light intensity L of the light-emitting portion 21 can be reduced at the moment T12 when the partial pattern 111 ends and the next partial pattern 111 begins. Therefore, in the lighting system 1 according to Embodiment 1, it is possible to suppress the discomfort caused by the change in light intensity L of the light-emitting part 21 being perceived as flickering at the moment T12 when the partial pattern 111 ends and the next partial pattern 111 begins.

[0075] 3. Fluctuating visual confirmation and discomfort

[0076] The relationship between the frequency of light intensity fluctuations and the amount of light intensity variation and human vision is explained in more detail.

[0077] (1) Frequency and flicker threshold

[0078] Figure 5 This is a graph showing the relationship between the fluctuation frequency of illumination and the flicker threshold. The flicker threshold is the lower limit of the ratio of the maximum to the minimum brightness required to detect flicker when the brightness of the light source varies in a sinusoidal waveform. That is, Figure 5 For each fluctuation frequency of the lighting, it was shown whether changes in the brightness of the light source were easily perceived as flickering and caused discomfort. At fluctuation frequencies with a low flicker threshold, even if the ratio of the maximum to minimum brightness value is small, it is easily perceived as flickering and easily causes discomfort. On the other hand, at fluctuation frequencies with a high flicker threshold, if the ratio of the maximum to minimum brightness value is not large, flickering may sometimes not be perceived, making it less likely to remember the discomfort caused by perceiving flickering, and the relaxing effect of fluctuations in light intensity is easily obtained. Furthermore, in Figure 5In the middle, the higher the threshold, the smaller it is, and the lower the threshold, the larger it is. Therefore, the higher the threshold, the easier it is to detect flicker, and the lower the threshold, the harder it is to detect flicker.

[0079] like Figure 5 As shown, when the fluctuation frequency is below 20Hz, the smaller the fluctuation frequency, the larger the threshold. That is, when the fluctuation frequency is below 20Hz, if the ratio of the maximum to the minimum light intensity is not large, the smaller the fluctuation frequency, the less likely it is to be perceived as flicker. In particular, when the fluctuation frequency is below 1Hz, it is not easy to perceive the change in light intensity caused by the fluctuation as flicker, thereby obtaining the relaxing effect brought about by the fluctuation.

[0080] (2) Combination of frequency and change in light intensity

[0081] Figure 6 This is an experimental result obtained by investigating the sensitivity to discomfort and fluctuations in light intensity by combining the frequency of light intensity fluctuations with the amount of change in light intensity. Figure 6 In this context, D1 represents the combination where fluctuations in light intensity are easily perceived as flickering, causing discomfort. D2 represents the combination where fluctuations in light intensity are difficult to perceive and relaxation is difficult to achieve. Furthermore, the combinations where it is difficult to perceive fluctuations in light intensity as flickering and where discomfort is difficult to remember are represented by A, B, and C, in descending order of the proportion of people who perceive fluctuations in light intensity and achieve relaxation.

[0082] like Figure 6 As shown, when the fluctuation frequency of light intensity exceeds 1 Hz, it is easier to perceive the fluctuation as flickering and cause discomfort compared to when the fluctuation frequency is below 1 Hz. Therefore, a fluctuation frequency of light intensity below 1 Hz is preferable. Furthermore, when the fluctuation frequency of light intensity is below 0.5 Hz, the relaxing effect of the light intensity fluctuation is further amplified. Therefore, a fluctuation frequency of light intensity below 0.5 Hz is more preferable.

[0083] In addition, such as Figure 6 As shown, when the ratio of the maximum to the minimum light intensity exceeds 10, fluctuations in light intensity are easily perceived as flickering, which can easily cause discomfort. Therefore, the ratio of the maximum to the minimum light intensity is preferably 10 or less. Furthermore, when the ratio of the maximum to the minimum light intensity is 5 or less, it is even more difficult to perceive fluctuations in light intensity as flickering, and therefore this is even more preferable.

[0084] On the other hand, such as Figure 6As shown, when the ratio of the maximum to the minimum light intensity is less than 2, fluctuations in light intensity are difficult to perceive. Therefore, it is preferable that the ratio of the maximum to the minimum light intensity is 2 or more. Furthermore, when the ratio of the maximum to the minimum light intensity is 3 or more, fluctuations in light intensity are more easily perceived, and therefore this is even more preferable.

[0085] 4. Effects

[0086] In the lighting system 1 according to Embodiment 1, in the light output pattern, the component intensity of the light component with a frequency greater than 1 Hz is less than 5% of the maximum value of the component intensity of the light component with a frequency less than 1 Hz. That is, the light output pattern includes light components with a frequency less than 1 Hz, and the component intensity of the light component with a frequency greater than 1 Hz is less than 5% of the maximum value of the component intensity of the light component with a frequency less than 1 Hz. Therefore, in the lighting system 1 according to Embodiment 1, the discomfort caused by perceiving fluctuations in light intensity as flicker can be suppressed, and the user can be provided with a sense of relaxation brought about by fluctuations in light intensity.

[0087] Furthermore, in the lighting system 1 according to Embodiment 1, the ratio of the maximum value Lmax to the minimum value Lmin of the light intensity L of the light-emitting part 21 in the light output pattern is 2 or more and 10 or less. Therefore, the user can perceive the fluctuation of the light intensity L, and the discomfort caused by perceiving the fluctuation of the light intensity L as flicker can be suppressed. Thus, in the lighting system 1 according to Embodiment 1, the user can reliably be provided with a sense of relaxation resulting from the fluctuation of the light intensity L of the light-emitting part 21.

[0088] Furthermore, in the lighting system 1 according to Embodiment 1, the light output pattern includes a partial pattern. The partial pattern is repeated multiple times in the light output pattern. Therefore, it is not necessary to store the light output pattern based on the light output pattern for the entire period of controlling the light-emitting unit 21 in the storage unit 12 in advance, which saves the capacity of the storage unit 12 and increases the variation of the light output pattern.

[0089] Furthermore, in the lighting system 1 according to Embodiment 1, the ratio L1 / L2 of the light intensity L1 of the light-emitting portion 21 at the beginning of the partial pattern to the light intensity L2 of the light-emitting portion 21 at the end of the partial pattern is 0.9 or more and 1.1 or less. Therefore, in the light output pattern, the light intensity of the light-emitting portion 21 does not change between the end of the partial pattern and the beginning of the next partial pattern. Therefore, in the lighting system 1 according to Embodiment 1, flickering of the light output by the light-emitting portion 21 between the end of the partial pattern and the beginning of the next partial pattern can be prevented.

[0090] Furthermore, in the lighting system 1 according to Embodiment 1, during the beginning-side period P21, where the beginning of a partial pattern is set as the start time and has a predetermined time length, the light intensity L of the light-emitting part 21 is 0.85 times or more and 1.15 times or less than the light intensity L1 of the light-emitting part 21 at the beginning of the partial pattern. Also, during the end-side period P22, where the end of a partial pattern is set as the end time and has a predetermined time length, the light intensity L of the light-emitting part 21 is 0.85 times or more and 1.15 times or less than the light intensity L2 of the light-emitting part 21 at the end of the partial pattern. Therefore, in the light output pattern, the degree of change in light intensity is not different between the end of the partial pattern and the beginning of the next partial pattern. Therefore, in the lighting system 1 according to Embodiment 1, flickering of the light output by the light-emitting part 21 between the end of the partial pattern and the beginning of the next partial pattern can be prevented.

[0091] (Implementation Method 2)

[0092] In the lighting system 1 according to Embodiment 2, the frequency distribution of the light output pattern also satisfies the following conditions.

[0093] Figure 7 This is a graph showing the frequency distribution 132 of the light output pattern according to Embodiment 2. Figure 7 As shown, the light output pattern includes at least light components with a frequency below 0.1 Hz and light components with a frequency greater than 0.1 Hz and less than 0.3 Hz.

[0094] In the light output pattern according to Embodiment 2, the peak-to-average value of the component intensity of light components with a frequency of 0.1 Hz or less is greater than the peak-to-average value of the component intensity of light components with a frequency greater than 0.1 Hz and less than 0.3 Hz. Furthermore, the peak-to-average value of the component intensity of light components with a frequency greater than 0.1 Hz and less than 0.3 Hz is greater than the peak-to-average value of the component intensity of light components with a frequency of 0.3 Hz or more.

[0095] Here, in the frequency distribution 132 of the light output pattern, the peak-to-average value of the component intensity of the light component with a frequency below 0.1 Hz is the average value of the peak intensity in the range of frequencies below 0.1 Hz. That is, as... Figure 7 As shown, when multiple peaks exist in the frequency distribution 132 of the light output pattern in the range below 0.1 Hz, the average value of these peaks is the average value of the component intensities of each light component corresponding to the peak. That is, in Figure 7In the above, the average value obtained by averaging the component intensities of peaks F1 to F4 is the peak-to-peak average value of the component intensities of the light components with frequencies below 0.1 Hz. Furthermore, when there is only one peak in the frequency distribution 132 of the light output pattern in the range of frequencies below 0.1 Hz, the component intensity of the light component corresponding to the peak is the peak-to-peak average value of the component intensities of the light components with frequencies below 0.1 Hz.

[0096] Similarly, in the frequency distribution 132 of the light output pattern, the peak-to-average value of the component intensity of the light component with a frequency greater than 0.1 Hz and less than 0.3 Hz is the average value of the peak intensity in the range of frequencies greater than 0.1 Hz and less than 0.3 Hz. That is, in Figure 7 In the above, the peak-to-average value of the component intensity of the light component with a frequency greater than 0.1 Hz and less than 0.3 Hz is the value obtained by averaging the intensities of peaks F5 to F12. Furthermore, when there is only one peak in the frequency distribution 132 of the light output pattern within the range of frequencies greater than 0.1 Hz and less than 0.3 Hz, the component intensity of the light component corresponding to that peak is the peak-to-average value of the component intensity of the light component with a frequency greater than 0.1 Hz and less than 0.3 Hz.

[0097] Similarly, in the frequency distribution 132 of the light output pattern, the peak-to-average value of the component intensity of the light component with a frequency above 0.3 Hz is the average value of the peak intensity in the range with a frequency greater than 0.3 Hz. That is, in Figure 7 In the frequency distribution 132 of the light output pattern, the peak-to-average value of the intensity of the light components with frequencies above 0.3 Hz is the value obtained by averaging the intensities of peaks F13 to F16. Furthermore, when only one peak exists in the frequency range above 0.3 Hz in the light output pattern's frequency distribution 132, the light intensity of the light component corresponding to that peak is the peak-to-average value of the intensity of the light components with frequencies above 0.3 Hz. Alternatively, in the frequency distribution 132 of the light output pattern, there may be no peaks in the frequency range above 0.3 Hz. In this case, the peak-to-average value of the intensity of the light components with frequencies above 0.3 Hz in the frequency distribution 132 of the light output pattern is 0.

[0098] By satisfying the above conditions through the light output pattern, in the frequency distribution 132 of the light output pattern, the lower the frequency of the light component, the greater its intensity, and the higher the frequency of the light component, the lower its intensity. In other words, the frequency distribution 132 of the light output pattern is a so-called "1 / f fluctuation." That is, since the intensity of the high-frequency light component in the light output pattern is low, the fluctuation of the light intensity L of the light-emitting part 21 is less likely to be perceived as flicker. On the other hand, since the intensity of the low-frequency light component in the light output pattern is high, the fluctuation of the light intensity L of the light-emitting part 21 is more easily perceived. Therefore, in the lighting system 1 according to Embodiment 2, the relaxation effect brought about by the fluctuation of light intensity can be improved while suppressing the discomfort caused by flicker. Furthermore, in the lighting system 1 according to Embodiment 2, the light output pattern includes multiple frequency components. Therefore, in the lighting system 1 according to Embodiment 2, the irregularity of the fluctuation of the light intensity L of the light-emitting part 21 based on the light output pattern can be improved, thereby further enhancing the relaxation effect.

[0099] (Implementation Method 3)

[0100] In the lighting system 1 according to embodiment 3, the light output pattern includes multiple partial patterns.

[0101] In the lighting system 1 according to Embodiment 3, the light output pattern includes two or more partial patterns. For example, the storage unit 12 stores a first partial pattern 112 and a second partial pattern 113. In the light output pattern, for example, the first partial pattern 112 and the second partial pattern 113 are repeated alternately. In the light output pattern, for example, the following pattern may be repeated: the second partial pattern 113 is followed by two consecutive first partial patterns 112. Alternatively, for example, the second partial pattern 113 may be repeated after three consecutive first partial patterns 112. That is, in the light output pattern, multiple partial patterns can be arbitrarily combined.

[0102] Figure 8 This is a graph illustrating the light output pattern 115 according to Embodiment 3. The light output pattern 115 includes a first partial pattern 112 and a second partial pattern 113 immediately following the first partial pattern 112. The first partial pattern 112 shows the light intensity L of the light-emitting portion 21 during the period P11 from time T13 to time T14. The second partial pattern 113 shows the light intensity L of the light-emitting portion 21 during the period P12 from time T14 to time T15.

[0103] In this case, the first part pattern 112 and the second part pattern 113 satisfy the following conditions.

[0104] During the end-side period P24, where the end of the first partial pattern 112 is set as the end time T14 and has a predetermined time length, the light intensity L of the light-emitting part 21 has the following relationship with the light intensity L4 at the end of the first partial pattern 112.

[0105] 0.85≤L / L⁴≤1.15……(Equation 6)

[0106] Furthermore, during the beginning-side period P25, where the beginning of the second part pattern 113 is set at the start time T14 and has a predetermined time length, the light intensity L of the light-emitting part 21 has the following relationship with the light intensity L5 at the beginning of the second part pattern 113.

[0107] 0.85≤L / L5≤1.15……(Equation 7)

[0108] Furthermore, the light intensity L5 of the light-emitting portion 21 at the beginning of the second pattern 113 and the light intensity L4 of the light-emitting portion 21 at the end of the first pattern 112 have the following relationship.

[0109] 0.9≤(L5 / L4)≤1.1……(Equation 8)

[0110] Therefore, in the light output pattern 115, at the moment T14 when the first partial pattern 112 ends and the second partial pattern 113 begins, the variation in the light intensity L of the light-emitting part 21 can be reduced. Thus, in the lighting system 1 according to Embodiment 3, at the moment T14 when the first partial pattern 112 ends and the second partial pattern 113 begins, discomfort caused by perceiving the change in the light intensity L of the light-emitting part 21 as flicker can be suppressed.

[0111] Furthermore, when the light output pattern 115 includes a repetition of the first partial pattern 112, it is preferable that, in addition to the conditions described above, the first partial pattern 112 satisfies the following conditions, similar to Embodiment 1. That is, regarding the first partial pattern 112, the light intensity L3 of the light-emitting portion 21 at the beginning and the light intensity L4 at the end satisfy the following conditions.

[0112] 0.9≤(L3 / L4)≤1.1……(Equation 9)

[0113] Furthermore, during the beginning side period P23, where the beginning of the first part pattern 112 is set as the start time T13 and has a predetermined time length, the light intensity L of the light-emitting part 21 has the following relationship with respect to the light intensity L3.

[0114] 0.85≤L / L3≤1.15……(Equation 10)

[0115] Furthermore, when the light output pattern 115 includes a repetition of the second part pattern 113, it is preferable that, in addition to the conditions described above, the second part pattern 113 satisfies the following conditions, similar to Embodiment 1. That is, regarding the second part pattern 113, the light intensity L5 of the light-emitting portion 21 at the beginning and the light intensity L6 at the end satisfy the following conditions.

[0116] 0.9≤(L5 / L6)≤1.1……(Equation 11)

[0117] Furthermore, during the end-side period P26, where the end of the second pattern 113 is set as the end time T15 and has a predetermined time length, the light intensity L of the light-emitting part 21 has the following relationship with respect to the light intensity L6.

[0118] 0.85≤L / L6≤1.15……(Equation 12)

[0119] Therefore, in the lighting system 1 according to Embodiment 3, similarly to the lighting system 1 according to Embodiment 1, it is possible to suppress the discomfort caused by perceiving fluctuations in light intensity as flickering, and to provide the user with a sense of relaxation brought about by fluctuations in light intensity.

[0120] (Implementation Method 4)

[0121] In the lighting system 1 according to embodiment 4, the light output pattern includes patterns other than partial patterns.

[0122] Figure 9 This is a graph illustrating the light output pattern 120 according to Embodiment 4. The light output pattern 120 includes a first partial pattern 112, a static pattern 121 continuous with the first partial pattern 112, and a second partial pattern 113 continuous with the static pattern 121. More specifically, in the light output pattern 120, the period from time T16 to time T17 is the first partial pattern 112. Furthermore, in the light output pattern 120, the period from time T17 to time T18 is the static pattern 121. Additionally, in the light output pattern 120, the period from time T18 to time T19 is the second partial pattern 113.

[0123] Similar to Embodiment 3, the first partial pattern 112 satisfies the following condition: The ratio L3 / L4 of the light intensity L3 of the light-emitting portion 21 at the beginning of the first partial pattern 112 to the light intensity L4 of the light-emitting portion 21 at the end of the first partial pattern 112 is 0.9 or more and 1.1 or less. Furthermore, during the beginning-side period P23 (refer to...) where the beginning of the first partial pattern 112 is set as the start time and has a predetermined time length... Figure 8The light intensity L of the light-emitting part 21 is 0.85 times or more and 1.15 times or less of the light intensity L3 of the light-emitting part 21 at the beginning of the first partial pattern 112. Furthermore, during the end-side period P24 (refer to...) where the end of the first partial pattern 112 is set as the end time and has a predetermined time length... Figure 8 The light intensity L of the light-emitting part 21 is more than 0.85 times and less than 1.15 times the light intensity L4 of the light-emitting part 21 at the end of the first pattern 112.

[0124] In addition, in the static pattern 121, during the period P3 from time T17 to time T18, the light intensity L of the light-emitting part 21 is the light intensity L4.

[0125] Therefore, in the light output pattern 120, at the moment T17 when the first partial pattern 112 ends and the static pattern 121 begins, the light intensity L of the light-emitting part 21 does not change relative to the light intensity L4. Furthermore, in the first partial pattern 112, during the end-side period P24, the change in the light intensity L of the light-emitting part 21 is small. Therefore, at the moment T17 when the first partial pattern 112 ends and the static pattern 121 begins, the change in the light intensity L of the light-emitting part 21 does not change significantly. Thus, in the lighting system 1 according to Embodiment 4, it is possible to suppress the perception of flickering as a change in the light intensity L of the light-emitting part 21 at the moment T17 when the first partial pattern 112 ends and the static pattern 121 begins.

[0126] Furthermore, in the light output pattern 120, at time T18 when the static pattern 121 ends and the second partial pattern 113 begins, the light intensity L of the light-emitting part 21 changes from light intensity L4 to light intensity L5. However, the light intensity L5 of the light-emitting part 21 at the beginning of the second partial pattern 113 and the light intensity L4 of the light-emitting part 21 at the end of the first partial pattern 112 satisfy a ratio L5 / L4 of 0.9 or more and 1.1 or less. Therefore, the change in light intensity L of the light-emitting part 21 at time T18 is not easily perceived as flickering. Additionally, in the second partial pattern 113, during the period P25 (refer to...) at the beginning side where the beginning is set as the start time... Figure 8 The change in light intensity L of the light-emitting part 21 is small. Therefore, even at the moment T18 when the static pattern 121 ends and the second partial pattern 113 begins, the change in light intensity L of the light-emitting part 21 will not change significantly. Thus, in the lighting system 1 according to Embodiment 4, it is possible to suppress the perception of the change in light intensity L of the light-emitting part 21 as flickering at the moment T18 when the static pattern 121 ends and the second partial pattern 113 begins.

[0127] Furthermore, no fluctuations in the light intensity L of the light-emitting portion 21 occur in the static pattern 121. Therefore, in the lighting system 1 according to Embodiment 4, the irregularity of the fluctuations in the light intensity L of the light-emitting portion 21 can be further improved in the light output pattern 120, thereby enhancing the relaxation effect.

[0128] Furthermore, in the light output pattern 120 according to Embodiment 4, the portion of the pattern immediately preceding the static pattern 121 is the first portion pattern 112, and the portion of the pattern immediately following the static pattern 121 is the second portion pattern 113. However, for example, it is also possible that both the portion of the pattern immediately preceding the static pattern 121 and the portion of the pattern immediately following it are the portion pattern 111 according to Embodiment 1.

[0129] (Modified Example)

[0130] In the variation examples, other methods of static patterning are explained.

[0131] In the static pattern 121 described in Embodiment 4, the light intensity of the light-emitting portion 21 does not change. However, the static pattern is not limited to this and may also be a pattern as follows.

[0132] Figure 10 This is a graph showing the static pattern 122 involved in the modified example. In the static pattern 122, P31 is a sine wave with a fixed frequency during the period. The frequency of the static pattern 122 is, for example, 0.3 Hz. In addition, the static pattern 122 satisfies the following conditions in the same way as the partial pattern involved in Embodiment 1. That is, the ratio L1 / L2 of the light intensity L1 of the light-emitting portion 21 at the beginning of the static pattern 122 to the light intensity L2 of the light-emitting portion 21 at the end of the static pattern 122 is 0.9 or more and 1.1 or less. In addition, during the period when the beginning of the static pattern 122 is set as the start time and has a predetermined time length, the light intensity L of the light-emitting portion 21 is 0.85 times or more and 1.15 times or less of the light intensity L1 of the light-emitting portion 21 of the static pattern 122. Furthermore, during the period when the end of the static pattern 122 is set as the end time and has a predetermined time length, the light intensity L of the light-emitting part 21 is more than 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting part 21 at the end of the static pattern 122.

[0133] In this case, at the moment when the partial pattern ends and the static pattern 122 begins, both the change in light intensity of the light-emitting part 21 and the degree of change in light intensity of the light-emitting part 21 can be reduced. Furthermore, even at the moment when the static pattern 122 ends and the partial pattern begins, both the change in light intensity of the light-emitting part 21 and the degree of change in light intensity of the light-emitting part 21 can be reduced. Therefore, flickering of the light emitted by the light-emitting part 21 can be suppressed.

[0134] Furthermore, the frequency of the static pattern 122 is not limited to 0.3 Hz. Additionally, the frequency of the static pattern 122 is 1 Hz or less. Furthermore, the frequency of the static pattern 122 may also be 0.5 Hz or less.

[0135] Furthermore, for example, in a static pattern, the light intensity L5 of the light-emitting portion 21 at the beginning of the second part of the pattern 113 immediately following the static pattern can be set to the light intensity L of the light-emitting portion 21. Alternatively, in a static pattern, the degree of variation in the light intensity of the light-emitting portion 21 can be kept constant, and the light intensity L of the light-emitting portion 21 can be varied from the light intensity L4 of the light-emitting portion 21 at the end of the first part of the pattern 112 immediately preceding the static pattern to the light intensity L5 of the light-emitting portion 21 at the beginning of the second part of the pattern immediately following the static pattern.

[0136] (Implementation Method 5)

[0137] In the lighting system 1 according to embodiment 5, the light output pattern includes multiple partial patterns, and the light intensity L of the light-emitting part 21 at the beginning and end of the partial pattern satisfies the following conditions.

[0138] Figure 11 This is a graph showing the light output pattern 116 according to Embodiment 5. The light output pattern 116 includes a partial pattern 114 and a continuous partial pattern 114. The partial pattern 114 shows the light intensity L of the light-emitting portion 21 during P4. The partial pattern 114 satisfies the conditions of the partial pattern in Embodiment 1.

[0139] Partial pattern 114 also satisfies the following conditions. In partial pattern 114, the light intensity L of the light-emitting portion 21 at both the beginning and end points is at a minimum. That is, in partial pattern 114, during the period P42 when the end point is set as the end time, the light intensity L of the light-emitting portion 21 decreases monotonically, and the time derivative dL / dt of L satisfies dL / dt≤0. Furthermore, in partial pattern 114, the degree of change in the light intensity of the light-emitting portion 21 at the end point of partial pattern 114 is 0, and the time derivative dL / dt of L satisfies dL / dt=0. Additionally, in partial pattern 114, during the period P41 when the beginning point is set as the start time, the light intensity L of the light-emitting portion 21 increases monotonically, and the time derivative dL / dt of L satisfies dL / dt≥0. Furthermore, in part of pattern 114, the degree of change in light intensity of the light-emitting part 21 at the beginning of part of pattern 114 is 0, and the time derivative of L, dL / dt, satisfies dL / dt=0.

[0140] By satisfying the above conditions, the degree of change in the light intensity L of the light-emitting unit 21 changes smoothly before and after the end of partial pattern 114 and the beginning of the next partial pattern 114. Therefore, in the lighting system 1 according to Embodiment 5, the flickering of the output of the light-emitting unit 21 can be suppressed when the end of partial pattern 114 and the beginning of the next partial pattern 114.

[0141] Furthermore, when the light output pattern includes a combination of multiple partial patterns, each partial pattern can individually satisfy the above conditions. Therefore, regardless of how the partial patterns are combined, flickering of the output of the light-emitting unit 21 at the end of a partial pattern and the beginning of the next partial pattern can be suppressed.

[0142] Furthermore, when the above conditions are met, the light intensity L1 of the light-emitting portion 21 at the beginning of the partial pattern and the light intensity L2 of the light-emitting portion 21 at the end of the partial pattern both decrease. That is, even when the ratio L1 / L2 of light intensity L1 is not 1, the difference L1-L2 between light intensity L1 and light intensity L2 also decreases. Therefore, in the lighting system 1 according to Embodiment 5, flickering of the output of the light-emitting portion 21 when a partial pattern ends and the next partial pattern begins can be suppressed.

[0143] (Implementation Method 6)

[0144] In the lighting system 1 according to Embodiment 6, the time during which the control unit 11 controls the light-emitting unit 21 includes time not based on the light output pattern. Furthermore, in the lighting system 1 according to Embodiment 6, the light output pattern includes time during which the light intensity L does not satisfy the condition Lmin ≤ L ≤ Lmax.

[0145] Figure 12 This is a graph illustrating the light output pattern 130 according to Embodiment 6. Figure 12 In the first period from time 0s to time 50s, the control unit 11 controls the light intensity L of the light-emitting unit 21.

[0146] During the period from time 0s to time T1, P53, the control unit 11 increases the light intensity L of the light-emitting unit 21 from 0 to light intensity Lmin. The change 141 of light intensity L during P53 includes periods when light intensity L is less than light intensity Lmin. Additionally, as... Figure 12 As shown, the change 141 in light intensity L of P53 during this period may also include the time when light intensity L is greater than light intensity Lmax. The time when light intensity L is greater than light intensity Lmax is caused, for example, by the inrush flow into the light-emitting part 21.

[0147] Next, during the second period P51 from time T1 to time T2, the control unit 11 controls the light intensity L of the light-emitting unit 21 based on the light output pattern 130. The light output pattern 130 during the second period P51 includes at least light components with a frequency of 1 Hz or less. Furthermore, in the light output pattern 130, the light intensity of light components with a frequency greater than 1 Hz is less than 5% of the maximum value of the component intensity of light components with a frequency of 1 Hz or less.

[0148] Furthermore, during the second period P51, the light output pattern 130 includes at least a third period P52 where the light intensity L satisfies the condition Lmin ≤ L ≤ Lmax. Additionally, during the second period P51, the light output pattern 130 may include a fourth period P54 where the light intensity L does not satisfy the condition Lmin ≤ L ≤ Lmax. Preferably, the duration of the fourth period P54 is less than 10% of the duration of the second period P51 in which the control unit 11 controls the light-emitting unit 21 based on the light output pattern 130. Furthermore, the light intensity Lmin is the minimum value of the light intensity L in the third period P52. Additionally, the light intensity Lmax is the maximum value of the light intensity L in the third period P52. That is, the light intensity L in the fourth period P54 is excluded from the calculation of the maximum value Lmax and the minimum value Lmin of the light intensity L in the light output pattern 130. Furthermore, as explained in Embodiment 1, the ratio Lmax / Lmin is 2 or more and 10 or less.

[0149] Furthermore, the second period P51 may also exclude the fourth period P54, similar to embodiments 1 to 4. When the second period P51 excludes the fourth period P54, the third period P52 is the same as the second period P51. That is, the third period P52 is the entire period of the second period P51. Additionally, the minimum value Lmin is the minimum value of the light intensity L in the second period P51. And the maximum value Lmax is the maximum value of the light intensity L in the second period P51. In this case, the light output pattern 130 of the second period P51 satisfies the conditions of the light output pattern described in any of embodiments 1 to 4.

[0150] Next, during the period from time T2 to time 50s (P55), the control unit 11 causes the light intensity of the light-emitting unit 21 to decrease from light intensity Lmin to 0. The change 142 of light intensity L during this period (P55) includes times when light intensity L is less than light intensity Lmin. Additionally, the change 141 of light intensity L during this period (P55) may include times when light intensity L is greater than light intensity Lmax.

[0151] Therefore, in the lighting system 1 according to Embodiment 6, during the second period P51 when the control unit 11 controls the light intensity L of the light-emitting unit 21 based on the light output pattern 130, similarly to the lighting system 1 according to Embodiment 1, it is possible to suppress the discomfort caused by perceiving fluctuations in light intensity as flickering, and to provide the user with a sense of relaxation brought about by fluctuations in light intensity.

[0152] On the other hand, in the lighting system 1 according to Embodiment 6, during periods P53 and P55 when the control unit 11 controls the light intensity L of the light-emitting unit 21 without relying on the light output pattern, the light intensity L does not necessarily satisfy the condition Lmin≤L≤Lmax. Therefore, by using periods P53 and P55, it is easy to start or end the second period P51 during which the control unit 11 controls the light intensity L of the light-emitting unit 21 based on the light output pattern 130. Furthermore, in the lighting system 1 according to Embodiment 6, it is also possible that during the entire first period P50, the light intensity of light components with a frequency greater than 1 Hz is not necessarily less than 5% of the maximum value of the component intensity of light components with a frequency less than 1 Hz. That is, the periods P53 and P55 during which the control unit 11 controls the light intensity L of the light-emitting unit 21 without relying on the light output pattern may not include light components with a frequency less than 1 Hz, but may include light components with a frequency greater than 1 Hz. Therefore, the operation of the control unit 11 during the period during which the control unit 11 controls the light intensity L of the light-emitting unit 21 without relying on the light output pattern 130 can be simplified.

[0153] Alternatively, in the lighting system according to Embodiment 6, the light output pattern 130 may include a fourth period P54 in which the light intensity L does not satisfy the condition Lmin≤L≤Lmax during the second period P51. Preferably, the duration of the fourth period P54 is less than 10% of the duration of the second period P51 in which the control unit 11 controls the light-emitting unit 21 based on the light output pattern 130. This suppresses the significant decrease in relaxation caused by fluctuations in light intensity, thus simplifying the operation of the control unit 11.

[0154] Furthermore, in the lighting system according to Embodiment 6, the light output pattern 130 may include a partial pattern during the second period P51. In this case, the partial pattern may include a period during which the light intensity L does not satisfy the condition Lmin ≤ L ≤ Lmax. Additionally, it is preferable that the duration of the period during the second period P51 during which the light intensity L does not satisfy the condition Lmin ≤ L ≤ Lmax is less than 10% of the duration of the second period P51. For example, the partial pattern may be configured such that the duration of the period during which the light intensity L does not satisfy the condition Lmin ≤ L ≤ Lmax is less than 10% of the duration of the partial pattern. Thus, regardless of how the partial patterns are combined, the condition that the duration of the fourth period P54 is less than 10% of the duration of the second period P51 can be satisfied.

[0155] (Implementation Method 7)

[0156] In the lighting system 1 according to Embodiment 7, similarly to Embodiment 6, the time during which the control unit 11 controls the light-emitting unit 21 includes the time during which control is not based on the light output pattern. Furthermore, in the lighting system 1 according to Embodiment 7, during the time the control unit 11 controls the light-emitting unit 21, the light output pattern includes multiple partial patterns and multiple static patterns.

[0157] Figure 13 This is a graph illustrating the light output pattern according to Embodiment 7. Figure 13 In the first period from time 0s to time 450s, the control unit 11 controls the light intensity L of the light-emitting unit 21.

[0158] From time 0s to time T3, the control unit 11 controls the light intensity L of the light-emitting unit 21 so that the light intensity of the light-emitting unit 21 becomes the light intensity at the beginning of the partial pattern 117 described later at time T3. The control of the control unit 11 from time 0s to time T3 is not based on the light output pattern.

[0159] Next, starting from time T3, the control unit 11 begins to perform control based on the light output pattern 140. That is, time T3 is the beginning of the second period P51.

[0160] The light output pattern 140 includes multiple partial patterns 117, a static pattern 123, multiple partial patterns 118, a static pattern 124, and multiple partial patterns 118.

[0161] During the period from time T3 to time T4, the control unit 11 repeats partial pattern 117 multiple times (seven times in the example shown). Partial pattern 117 satisfies the conditions of partial pattern 111 or 114 described above. Therefore, the period from time T3 to time T4 during which partial pattern 117 is repeatedly implemented is the third period P52.

[0162] Next, during the period from time T4 to time T5, the control unit 11 implements static pattern 123.

[0163] Next, during the period from time T5 to time T6, the control unit 11 repeats partial pattern 118 multiple times (eight times in the example shown). Partial pattern 118 satisfies the conditions of partial pattern 111 or 114 described above. Therefore, the period from time T4 to time T5 during which partial pattern 118 is repeatedly implemented is the third period P52.

[0164] Next, during the period from time T6 to time T7, the control unit 11 implements static pattern 124.

[0165] Next, during the period from time T7 to time T8, the control unit 11 repeats partial pattern 119 multiple times (five times in the example shown). Partial pattern 119 satisfies the conditions of partial pattern 111 or 114 described above. Therefore, the period from time T7 to time T8 during which partial pattern 119 is repeatedly implemented is the third period P52.

[0166] Next, from time T8 to time 450s, the control unit 11 controls the light intensity L of the light-emitting unit 21. The control by the control unit 11 from time T8 to time 450s is not based on the light output pattern.

[0167] In the lighting system 1 according to Embodiment 7, the first period P50 during which the control unit 11 controls the light-emitting unit 21 includes a second period P51 during which the control unit 11 controls the light-emitting unit 21 based on the light output pattern 140. In each of the partial patterns 117, 118, 119 and the static patterns 123, 124, the component intensity of the light component with a frequency greater than 1 Hz is less than 5% of the maximum value of the component intensity of the light component with a frequency less than 1 Hz. Therefore, in the second period P51, the component intensity of the light component with a frequency greater than 1 Hz is less than 5% of the maximum value of the component intensity of the light component with a frequency less than 1 Hz. Furthermore, in each of the partial patterns 117, 118, and 119, the maximum value Lmax and the minimum value Lmin of the light intensity of the light-emitting unit 21 satisfy the relationship 2 ≤ Lmax / Lmin ≤ 10.

[0168] Therefore, in the lighting system according to Embodiment 7, it is possible to suppress the discomfort caused by perceiving fluctuations in light intensity as flickering, and to provide the user with a sense of relaxation brought about by fluctuations in light intensity.

[0169] Furthermore, the combination of partial pattern 117, static pattern 123, and partial pattern 118 can satisfy the conditions that the combination of the first partial pattern 112, static pattern 121, and second partial pattern 113 should satisfy. Similarly, the combination of partial pattern 118, static pattern 124, and partial pattern 119 can satisfy the conditions that the combination of the first partial pattern 112, static pattern 121, and second partial pattern 113 should satisfy. Thus, the entire second period P51 becomes the third period P52, thereby more effectively suppressing the discomfort caused by perceiving fluctuations in light intensity as flicker.

[0170] Furthermore, the repetition frequency of each pattern in partial patterns 117, 118, and 119 is illustrative and can be any number of times. Additionally, the light output pattern 140 may also include other partial patterns. Furthermore, any two or all of the patterns in partial patterns 117, 118, and 119 can be the same partial pattern.

[0171] (Other variations of the implementation method)

[0172] (1) In embodiments 1 to 7 and the modified examples, the light intensity L of the light-emitting part 21 is the brightness of the light-emitting surface of the light-emitting part 21. However, the light intensity L of the light-emitting part 21 is not limited to the brightness of the light-emitting part 21, as long as it is an index that directly or indirectly represents the intensity of the light output by the light-emitting part 21.

[0173] For example, the light intensity L of the light-emitting part 21 can be the luminance of the light-emitting part 21. Alternatively, for example, the light intensity L of the light-emitting part 21 can be the luminous flux of the light-emitting part 21. Alternatively, for example, the light intensity L of the light-emitting part 21 can be the dimming rate of the light-emitting part 21. Alternatively, for example, the light intensity L of the light-emitting part 21 can be the power consumption of the light-emitting part 21.

[0174] In addition, for example, the light intensity L of the light-emitting part 21 can be the illuminance at a specified position within a specified space illuminated by the light-emitting part 21. Figure 14A and Figure 14B An example of the conditions for measuring illuminance is shown. For example... Figure 14A and Figure 14B As shown, the designated space 30 is a cuboid space with a width Wa in the x-direction, a depth Da in the y-direction, and a height Ha in the z-direction. The light source device 20 is positioned on the ceiling with its light-emitting portion 21 facing the floor. The light source device 20 is positioned a distance Db in the y-direction from the end of the ceiling with its major axis and a distance Wb in the x-direction from the end of the ceiling with its minor axis. The designated position 31 is the ground level reached by the light source device 20 after moving in the z-direction. That is, the designated position 31 is a height Ha away from the light source device 20 in the z-direction. Furthermore, when viewed from above in the z-direction, the designated position 31 overlaps with the light source device 20. The width Wa in the x-direction, the depth Da in the y-direction, and the height Ha in the z-direction are, for example, 4.54m, 3.5m, and 2.5m, respectively. Additionally, the distance Wb in the x-direction between the end of the ceiling with its minor axis and the light source device 20, and the distance Db in the y-direction between the end of the ceiling with its major axis and the light source device 20, are, for example, 1.9m and 1.4m, respectively.

[0175] (2) In embodiments 1, 2, 4-5 and their variations, the case where the duration of the partial pattern is 40 seconds has been described. However, the duration of the partial pattern is not limited to 40 seconds. Furthermore, the duration of the partial pattern is preferably 30 seconds or more. This can suppress the feeling that the light output pattern is monotonous.

[0176] Similarly, in Embodiment 3, the case where the duration of each of the first and second partial patterns is 40 seconds was described. However, the duration of the first and second partial patterns is not limited to 40 seconds. Furthermore, the duration of the first and second partial patterns is preferably 30 seconds or more. This can suppress the feeling that the light output pattern is monotonous.

[0177] Furthermore, in embodiments 1 to 5 and their variations, the duration of the light output pattern is not described, but it is preferably 30 seconds or more. This increases the irregularity of the light output pattern, thereby enhancing the relaxation effect.

[0178] (3) In embodiments 1 to 7 and their variations, the lighting system 1 is described as having a control device 10 and a light source device 20. However, the lighting system 1 may be a lighting device having all the elements of the control device 10 and the light source device 20. In addition, the lighting system 1 may have a single control device 10 and multiple light source devices 20, with the single control device 10 controlling the multiple light source devices 20.

[0179] Furthermore, the light source device 20 is not limited to emitting light by applying voltage according to the dimming signal output by the control device 10. For example, the light-emitting part 21 of the light source device 20 may also emit light by using the dimming signal as a power source. Additionally, the light source device 20 may include a light-emitting part 21 and a dimming control unit, which controls the light intensity L of the light-emitting part 21 based on the dimming signal output by the control device 10. In this case, the dimming signal can indicate the light intensity L of the light-emitting part 21 to the dimming control unit; for example, it may be a signal indicating the light intensity L at each moment.

[0180] (Summarize)

[0181] The lighting system (1) according to the first method includes a light-emitting part (21) including a light source and a control part (11). The control part (11) controls the light-emitting part (21). The first period (P50) includes a second period (P51). In the first period (P50), the light intensity (L) of the light-emitting part (21) is controlled by the control part (11). In the second period (P51), the light intensity (L) of the light-emitting part (21) is controlled based on the light output pattern (110; 115; 116; 120; 130; 140). Regarding the light intensity (L) of the light-emitting part (21) controlled by the control part (11), in the second period (P51), the component intensity of the light component with a frequency greater than 1 Hz is less than 5% of the maximum value (I1) of the component intensity of the light component with a frequency less than 1 Hz. The second period (P51) includes at least a third period (P52). Furthermore, regarding the light intensity (L) of the light-emitting part (21) controlled by the control unit (11), the maximum value Lmax of the light intensity (L) of the light-emitting part (21) in the third period (P52) satisfies the following relationship with the minimum value Lmin of the light intensity (L) of the light-emitting part (21) in the third period (P52): 2≤Lmax / Lmin≤10.

[0182] According to the lighting system (1) described above, fluctuations in the light intensity (L) of the light-emitting part (21) can be detected. On the other hand, it is possible to suppress the discomfort caused by perceiving fluctuations in the light intensity (L) of the light-emitting part (21) as flickering. Therefore, a lighting system (1) that reproduces natural fluctuations and has a high relaxation effect can be realized.

[0183] In the lighting system (1) involved in the second method, based on the first method, the second period (P51) includes a third period (P52) and a fourth period (P54). In the fourth period (P54), the light intensity (L) of the light-emitting part (21) is greater than the maximum value Lmax or the light intensity (L) of the light-emitting part (21) is less than the minimum value Lmin. The duration of the fourth period (P54) is less than 10% of the duration of the second period (P51).

[0184] According to the lighting system (1) described above, the duration of the fourth period (P54), in which the relaxation effect is low due to the fluctuation of the light intensity (L) of the light-emitting part (21) during the second period (P51), is very short. Therefore, a lighting system (1) that reproduces natural fluctuations and has a high relaxation effect can be realized.

[0185] In the lighting system (1) involved in the third approach, based on the first approach, the third period (P52) is the entire period of the second period (P51).

[0186] According to the lighting system (1) described above, during the second period (P51), fluctuations in the light intensity (L) of the light-emitting part (21) can be perceived. On the other hand, it is possible to suppress the discomfort caused by perceiving fluctuations in the light intensity (L) of the light-emitting part (21) as flickering. Therefore, a lighting system (1) that reproduces natural fluctuations and has a high relaxation effect can be realized.

[0187] In the lighting system (1) involved in the fourth method, based on the first to third methods, the light output pattern (110; 116; 120; 140) includes partial patterns (111; 114; 117 to 119). The partial patterns (111; 114; 117 to 119) are repeated multiple times in the light output pattern (110; 116; 120; 140). The light intensity L1 of the light-emitting part (21) at the beginning of the partial pattern (111; 114; 117 to 119) and the light intensity L2 of the light-emitting part (21) at the end of the partial pattern (111; 114; 117 to 119) satisfy the following relationship: 0.9≤L1 / L2≤1.1.

[0188] According to the lighting system (1) described above, a light output pattern (110; 116; 120; 140) can be generated by repeating partial patterns (111; 114; 117-119) multiple times. Therefore, it is not necessary to maintain the entire light output pattern (110; 116; 120; 140), which can improve the utilization efficiency of the storage medium. In addition, the drastic change in the light intensity (L) of the light-emitting part (21) can be suppressed from the end of the partial pattern (111; 114; 117-119) to the beginning of the next partial pattern (111; 114; 117-119), thus suppressing the flickering of the light-emitting part (21).

[0189] In the lighting system (1) according to the fifth method, based on the fourth method, the light intensity (L) of the light-emitting part (21) during the period of 0.5 seconds (P21) starting from the beginning of the partial pattern (111; 114; 117-119) is more than 0.85 times and less than 1.15 times the light intensity L1 of the light-emitting part (21) at the beginning of the partial pattern (111; 114; 117-119). Furthermore, the light intensity (L) of the light-emitting part (21) during the period of 0.5 seconds (P22) ending from the end of the partial pattern (111; 114; 117-119) is more than 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting part (21) at the end of the partial pattern (111; 114; 117-119).

[0190] According to the lighting system (1) described above, during the 0.5-second period (P21) starting at the beginning of the partial patterns (111; 114; 117-119) and the 0.5-second period (P22) ending at the end of the partial patterns (111; 114; 117-119), the change in light intensity (L) of the light-emitting part (21) decreases by the same degree. Therefore, from the end of the partial patterns (111; 114; 117-119) to the beginning of the next partial pattern (111; 114; 117-119), the change in light intensity (L) of the light-emitting part (21) decreases by the same degree, thus suppressing the flickering of the light-emitting part (21).

[0191] In the lighting system (1) involved in the sixth method, based on the fourth or fifth method, some patterns (111; 114) are data representing the operation of the light-emitting part (21) during a period of more than 30 seconds.

[0192] According to the lighting system (1) described above, in the light output patterns (110; 116; 120), the repetition period of some patterns (111; 114) is more than 30 seconds. Therefore, it is possible to avoid short-term periodic changes in the light intensity (L) of the light-emitting part (21), thereby achieving more natural fluctuations in the light intensity (L) of the light-emitting part (21).

[0193] In the lighting system (1) according to the seventh method, based on the first to third methods, the light output pattern (115) includes a first part pattern (112) and a second part pattern (113). The light output pattern (115) includes at least a continuous part in the order of the first part pattern (112) and the second part pattern (113). The light intensity L1 (L5) of the light-emitting part (21) at the beginning of the second part pattern (113) and the light intensity L2 (L4) of the light-emitting part (21) at the end of the first part pattern (112) satisfy the following relationship: 0.9≤L1 / L2≤1.1.

[0194] According to the lighting system (1) described above, a light output pattern (115) can be generated by combining the first partial pattern (112) and the second partial pattern (113). Therefore, by maintaining the first partial pattern (112) and the second partial pattern (113), various light output patterns (115) can be generated. In addition, drastic changes in the light intensity (L) of the light-emitting part (21) can be suppressed from the end of the first partial pattern (112) to the beginning of the second partial pattern (113), thus suppressing the flickering of the light-emitting part (21).

[0195] In the lighting system (1) involved in the eighth method, based on the seventh method, the light output pattern (115) also includes a continuous part in the order of the second part pattern (113) and the first part pattern (112).

[0196] According to the lighting system (1) involved in the above method, more light output patterns (115) can be generated by combining the first part pattern (112) and the second part pattern (113).

[0197] In the lighting system (1) according to the ninth method, based on the seventh or eighth method, the light intensity (L) of the light-emitting part (21) during the period of 0.5 seconds (P24) ending at the end of the first partial pattern (112) is more than 0.85 times and less than 1.15 times the light intensity L2 (L4) of the light-emitting part (21) at the end of the first partial pattern (112). Furthermore, the light intensity (L) of the light-emitting part (21) during the period of 0.5 seconds (P25) starting at the beginning of the second partial pattern (113) is more than 0.85 times and less than 1.15 times the light intensity L1 (L5) of the light-emitting part (21) at the beginning of the second partial pattern (113).

[0198] According to the lighting system (1) described above, during the 0.5-second period (P24) from the end of the first partial pattern (112) to the beginning of the second partial pattern (113) (P25), the change in light intensity (L) of the light-emitting part (21) decreases by the same degree. Therefore, from the end of the first partial pattern (112) to the beginning of the second partial pattern (113), the change in light intensity (L) of the light-emitting part (21) decreases by the same degree, thus suppressing the flickering of the light-emitting part (21).

[0199] In the lighting system (1) involved in the tenth method, based on any of the seventh to ninth methods, the first part pattern (112) and the second part pattern (113) are respectively data representing the operation of the light-emitting part (21) during a period of 30 seconds or more.

[0200] According to the lighting system (1) involved in the above method, the periodic changes in the light intensity (L) of the light-emitting part (21) in the light output pattern (115) can be avoided in the short term, thereby achieving a more natural fluctuation in the light intensity (L) of the light-emitting part (21).

[0201] In the lighting system (1) involved in the eleventh method, based on any of the first to tenth methods, regarding the light intensity (L) of the light-emitting part (21) based on the light output pattern (110; 115; 116; 120; 130; 140), the component intensity of the light component with a frequency greater than 0.5 Hz is less than 5% of the maximum value (I2) of the component intensity of the light component with a frequency less than 0.5 Hz.

[0202] According to the lighting system (1) described above, fluctuations in the light intensity (L) of the light-emitting part (21) can be detected. On the other hand, it is possible to suppress the discomfort caused by perceiving fluctuations in the light intensity (L) of the light-emitting part (21) as flickering. Therefore, a lighting system (1) that reproduces natural fluctuations and has a high relaxation effect can be realized.

[0203] In the lighting system (1) involved in the twelfth method, based on any of the first to eleventh methods, regarding the light intensity (L) of the light-emitting part (21) based on the light output pattern (110; 115; 116; 120; 130; 140), the peak-to-average value of the component intensity of light components with a frequency greater than 0.1 Hz and less than 0.3 Hz is smaller than the peak-to-average value of the component intensity of light components with a frequency of less than 0.1 Hz and larger than the peak-to-average value of the component intensity of light components with a frequency of more than 0.3 Hz.

[0204] According to the lighting system (1) described above, the frequency distribution of the light output pattern (110; 115; 116; 120; 130; 140) exhibits a so-called 1 / f fluctuation characteristic, where the intensity of the light component with lower frequency is greater and the intensity of the light component with higher frequency is smaller. Therefore, fluctuations in the light intensity (L) of the light-emitting part (21) can be perceived, while simultaneously suppressing discomfort caused by perceiving fluctuations in the light intensity (L) of the light-emitting part (21) as flickering. Thus, a lighting system (1) that reproduces natural fluctuations and has a high relaxing effect can be realized.

[0205] In the lighting system (1) involved in the thirteenth method, based on any of the first to twelfth methods, the light output pattern (110; 115; 116; 120; 130; 140) is data representing the operation of the light-emitting part during a period of 30 seconds or more.

[0206] According to the lighting system (1) involved in the above method, the periodic changes in the light intensity (L) of the light-emitting part (21) in the light output pattern (110; 115; 116; 120; 130; 140) can be avoided in the short term, thereby achieving a more natural fluctuation in the light intensity (L) of the light-emitting part (21).

[0207] The control device (10) according to the fourteenth method includes a control unit (11). The control unit (11) controls the light output of the light-emitting unit (21), which includes a light source. The first period (P50) includes a second period (P51). In the first period (P50), the light intensity (L) of the light-emitting unit (21) is controlled by the control unit (11). In the second period (P51), the light intensity (L) of the light-emitting unit (21) is controlled based on the light output pattern (110; 115; 116; 120; 130; 140). Regarding the light intensity (L) of the light-emitting unit (21) controlled by the control unit (11), in the second period (P51), the component intensity of the light component with a frequency greater than 1 Hz is less than 5% of the maximum value of the component intensity of the light component with a frequency less than 1 Hz. The second period (P51) includes at least a third period (P52). Furthermore, regarding the light intensity (L) of the light-emitting part (21) controlled by the control unit (11), the maximum value Lmax of the light intensity (L) of the light-emitting part (21) in the third period (P52) relative to the minimum value Lmin of the light intensity (L) of the light-emitting part (21) in the third period (P52) satisfies the following relationship: 2≤Lmax / Lmin≤10.

[0208] According to the control device (10) described above, fluctuations in the light intensity (L) of the light-emitting part (21) can be detected. On the other hand, it can suppress the discomfort caused by perceiving fluctuations in the light intensity (L) of the light-emitting part (21) as flickering. Therefore, the control device (10) enables the light-emitting part (21) to function as a highly relaxing illumination that reproduces natural fluctuations.

[0209] The control method involved in the fifteenth method includes a control step. In the control step, the light output of the light-emitting part (21) including the light source is controlled. A first period (P50) includes a second period (P51). In the first period (P50), the light intensity (L) of the light-emitting part (21) is controlled by the control step. In the second period (P51), the light intensity (L) of the light-emitting part (21) is controlled based on the light output pattern (110; 115; 116; 120; 130; 140). In the control step, regarding the light intensity (L) of the light output of the light-emitting part (21), in the second period (P51), the component intensity of light components with a frequency greater than 1 Hz is less than 5% of the maximum value of the component intensity of light components with a frequency less than 1 Hz. The second period (P51) includes a third period (P52). Furthermore, in the control step, regarding the light intensity (L) of the light output of the light-emitting part (21), the maximum value Lmax of the light intensity (L) of the light-emitting part (21) in the third period (P52) relative to the minimum value Lmin of the light intensity (L) of the light-emitting part (21) in the third period (P52) satisfies the following relationship: 2≤Lmax / Lmin≤10.

[0210] According to the control method described above, fluctuations in the light intensity (L) of the light-emitting part (21) can be detected. On the other hand, it is possible to suppress the discomfort caused by perceiving fluctuations in the light intensity (L) of the light-emitting part (21) as flickering. Therefore, through the control method, the light-emitting part (21) can function as a highly relaxing illumination that reproduces natural fluctuations.

[0211] Explanation of reference numerals in the attached figures

[0212] 1: Lighting system; 10: Control device; 11: Control unit; 20: Light source device; 21: Light-emitting unit; 110, 115, 116, 120, 130, 140: Light output patterns; 111, 114, 117, 118, 119: Partial patterns; 112: First partial pattern; 113: Second partial pattern; L: Light intensity; Lmax: Maximum light intensity; Lmin: Minimum light intensity; L1: Light intensity; L2: Light intensity; I1: Maximum component intensity; I2: Maximum component intensity; P50: First period; P51: Second period; P52: Third period; P54: Fourth period; P21: Start-side period; P22: End-side period; P24: End-side period; P25: Start-side period.

Claims

1. A lighting system comprising: The light-emitting part includes a light source; and The control unit controls the light-emitting unit. Regarding the light intensity of the light-emitting part controlled by the control unit, The first period during which the control unit controls the light intensity of the light-emitting unit includes a second period during which the light intensity of the light-emitting unit is controlled based on the light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum component intensity of light components with frequencies less than 1 Hz. The second period includes at least the third period. The maximum value Lmax of the light intensity of the light-emitting part during the third period, relative to the minimum value Lmin of the light intensity of the light-emitting part during the third period, satisfies the following relationship: 2≤Lmax / Lmin≤10, The light output pattern includes a partial pattern. The partial pattern is repeated multiple times in the light output pattern. The light intensity L1 of the light-emitting part at the beginning of the partial pattern and the light intensity L2 of the light-emitting part at the end of the partial pattern satisfy the following relationship: 0.9≤L1 / L2≤1.1, The light intensity of the light-emitting portion during a period of 0.5 seconds starting from the beginning of the partial pattern is 0.85 times or more and 1.15 times or less the light intensity L1 of the light-emitting portion at the beginning of the partial pattern. The light intensity of the light-emitting part during the 0.5-second period ending at the end of the partial pattern is more than 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting part at the end of the partial pattern.

2. The lighting system according to claim 1, characterized in that, The second period includes the third and fourth periods, wherein the fourth period is the period during which the light intensity of the light-emitting part is greater than the maximum value Lmax or less than the minimum value Lmin. The duration of the fourth period is less than 10% of the duration of the second period.

3. The lighting system according to claim 1, characterized in that, The third period is the entire period of the second period.

4. The lighting system according to any one of claims 1 to 3, characterized in that, The pattern represents data indicating the operation of the light-emitting part during a period of 30 seconds or more.

5. The lighting system according to any one of claims 1 to 3, characterized in that, Regarding the light intensity of the light-emitting portion based on the light output pattern, The intensity of light components with frequencies greater than 0.5 Hz is less than 5% of the maximum intensity of light components with frequencies less than 0.5 Hz.

6. The lighting system according to any one of claims 1 to 3, characterized in that, Regarding the light intensity of the light-emitting part based on the light output, The peak-to-average intensity of light components with frequencies greater than 0.1 Hz and less than 0.3 Hz is smaller than that of light components with frequencies below 0.1 Hz, but larger than that of light components with frequencies above 0.3 Hz.

7. The lighting system according to any one of claims 1 to 3, characterized in that, The light output pattern represents data indicating the operation of the light-emitting part during a period of 30 seconds or more.

8. A lighting system comprising: The light-emitting part includes a light source; and The control unit controls the light-emitting unit. Regarding the light intensity of the light-emitting part controlled by the control unit, The first period during which the control unit controls the light intensity of the light-emitting unit includes a second period during which the light intensity of the light-emitting unit is controlled based on the light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum component intensity of light components with frequencies less than 1 Hz. The second period includes at least the third period. The maximum value Lmax of the light intensity of the light-emitting part during the third period, relative to the minimum value Lmin of the light intensity of the light-emitting part during the third period, satisfies the following relationship: 2≤Lmax / Lmin≤10, The light output pattern includes a first part of the pattern and a second part of the pattern. The light output pattern includes at least a continuous portion following the order of the first part of the pattern and the second part of the pattern. The light intensity L1 of the light-emitting portion at the beginning of the second partial pattern and the light intensity L2 of the light-emitting portion at the end of the first partial pattern satisfy the following relationship: 0.9≤L1 / L2≤1.1, The light intensity of the light-emitting portion during a period of 0.5 seconds from the end of the first partial pattern is at least 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting portion at the end of the first partial pattern. The light intensity of the light-emitting part during a period of 0.5 seconds from the beginning of the second partial pattern is more than 0.85 times and less than 1.15 times the light intensity L1 of the light-emitting part at the beginning of the second partial pattern.

9. The lighting system according to claim 8, characterized in that, The light output pattern also includes portions that are consecutive in the order of the second part of the pattern and the first part of the pattern.

10. The lighting system according to claim 8 or 9, characterized in that, The first part of the pattern and the second part of the pattern represent data on the operation of the light-emitting part during a period of 30 seconds or more.

11. The lighting system according to claim 8 or 9, characterized in that, Regarding the light intensity of the light-emitting portion based on the light output pattern, The intensity of light components with frequencies greater than 0.5 Hz is less than 5% of the maximum intensity of light components with frequencies less than 0.5 Hz.

12. The lighting system according to claim 8 or 9, characterized in that, Regarding the light intensity of the light-emitting part based on the light output, The peak-to-average intensity of light components with frequencies greater than 0.1 Hz and less than 0.3 Hz is smaller than that of light components with frequencies below 0.1 Hz, but larger than that of light components with frequencies above 0.3 Hz.

13. The lighting system according to claim 8 or 9, characterized in that, The light output pattern represents data indicating the operation of the light-emitting part during a period of 30 seconds or more.

14. A control device, It includes a control unit that controls the light output of a light-emitting unit, including a light source. Regarding the light intensity of the light-emitting part controlled by the control unit, The first period during which the control unit controls the light intensity of the light-emitting unit includes a second period during which the light intensity of the light-emitting unit is controlled based on the light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum component intensity of light components with frequencies less than 1 Hz. The second period includes at least the third period. The maximum value Lmax of the light intensity of the light-emitting part during the third period, relative to the minimum value Lmin of the light intensity of the light-emitting part during the third period, satisfies the following relationship: 2≤Lmax / Lmin≤10, The light output pattern includes a partial pattern. The partial pattern is repeated multiple times in the light output pattern. The light intensity L1 of the light-emitting part at the beginning of the partial pattern and the light intensity L2 of the light-emitting part at the end of the partial pattern satisfy the following relationship: 0.9≤L1 / L2≤1.1, The light intensity of the light-emitting portion during a period of 0.5 seconds starting from the beginning of the partial pattern is 0.85 times or more and 1.15 times or less the light intensity L1 of the light-emitting portion at the beginning of the partial pattern. The light intensity of the light-emitting part during the 0.5-second period ending at the end of the partial pattern is more than 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting part at the end of the partial pattern.

15. A control method, The control step includes controlling the light output of the light-emitting part, including the light source. In the control step, the light intensity of the light output from the light-emitting part is... The first period for controlling the light intensity of the light-emitting part through the control steps includes a second period for controlling the light intensity of the light-emitting part based on the light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum component intensity of light components with frequencies less than 1 Hz. The second period includes at least the third period. The maximum value Lmax of the light intensity of the light-emitting part during the third period, relative to the minimum value Lmin of the light intensity of the light-emitting part during the third period, satisfies the following relationship: 2≤Lmax / Lmin≤10, The light output pattern includes a partial pattern. The partial pattern is repeated multiple times in the light output pattern. The light intensity L1 of the light-emitting part at the beginning of the partial pattern and the light intensity L2 of the light-emitting part at the end of the partial pattern satisfy the following relationship: 0.9≤L1 / L2≤1.1, The light intensity of the light-emitting portion during a period of 0.5 seconds starting from the beginning of the partial pattern is 0.85 times or more and 1.15 times or less the light intensity L1 of the light-emitting portion at the beginning of the partial pattern. The light intensity of the light-emitting part during the 0.5-second period ending at the end of the partial pattern is more than 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting part at the end of the partial pattern.

16. A control device, It includes a control unit that controls the light output of a light-emitting unit, including a light source. Regarding the light intensity of the light-emitting part controlled by the control unit, The first period during which the control unit controls the light intensity of the light-emitting unit includes a second period during which the light intensity of the light-emitting unit is controlled based on the light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum component intensity of light components with frequencies less than 1 Hz. The second period includes at least the third period. The maximum value Lmax of the light intensity of the light-emitting part during the third period, relative to the minimum value Lmin of the light intensity of the light-emitting part during the third period, satisfies the following relationship: 2≤Lmax / Lmin≤10, The light output pattern includes a first part of the pattern and a second part of the pattern. The light output pattern includes at least a continuous portion following the order of the first part of the pattern and the second part of the pattern. The light intensity L1 of the light-emitting portion at the beginning of the second partial pattern and the light intensity L2 of the light-emitting portion at the end of the first partial pattern satisfy the following relationship: 0.9≤L1 / L2≤1.1, The light intensity of the light-emitting portion during a period of 0.5 seconds from the end of the first partial pattern is at least 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting portion at the end of the first partial pattern. The light intensity of the light-emitting part during a period of 0.5 seconds from the beginning of the second partial pattern is more than 0.85 times and less than 1.15 times the light intensity L1 of the light-emitting part at the beginning of the second partial pattern.

17. A control method, The control step includes controlling the light output of the light-emitting part, including the light source. In the control step, the light intensity of the light output from the light-emitting part is... The first period for controlling the light intensity of the light-emitting part through the control steps includes a second period for controlling the light intensity of the light-emitting part based on the light output pattern. During the second period, the component intensity of light components with frequencies greater than 1 Hz is less than 5% of the maximum component intensity of light components with frequencies less than 1 Hz. The second period includes at least the third period. The maximum value Lmax of the light intensity of the light-emitting part during the third period, relative to the minimum value Lmin of the light intensity of the light-emitting part during the third period, satisfies the following relationship: 2≤Lmax / Lmin≤10, The light output pattern includes a first part of the pattern and a second part of the pattern. The light output pattern includes at least a continuous portion following the order of the first part of the pattern and the second part of the pattern. The light intensity L1 of the light-emitting portion at the beginning of the second partial pattern and the light intensity L2 of the light-emitting portion at the end of the first partial pattern satisfy the following relationship: 0.9≤L1 / L2≤1.1, The light intensity of the light-emitting portion during a period of 0.5 seconds from the end of the first partial pattern is at least 0.85 times and less than 1.15 times the light intensity L2 of the light-emitting portion at the end of the first partial pattern. The light intensity of the light-emitting part during a period of 0.5 seconds from the beginning of the second partial pattern is more than 0.85 times and less than 1.15 times the light intensity L1 of the light-emitting part at the beginning of the second partial pattern.

Images