Lighting device and control method

Abstract

To provide a lighting fixture capable of improving the relaxation effect by fluctuation of the light intensity of a light-emitting portion.SOLUTION: A lighting device includes a light-emitting portion and a control portion. The light-emitting portion includes a light source. The control portion controls the light-emitting portion. A period during which the control portion dynamically changes the light intensity L1 of the light output from the light-emitting portion includes a first period T1 and a second period T2. An average value La2 of the light intensity L1 of the light-emitting portion in the second period T2 is greater than an average value La1 of the light intensity L1 of the light-emitting portion in the first period T1. A maximum value of the moving average of the light intensity L1 of the light-emitting portion in the second period T2 is greater than a maximum value of the moving average of the light intensity L1 of the light-emitting portion in the first period T1.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a lighting device and a control method, and more particularly to a lighting device and a control method for dynamically changing the light intensity of a light-emitting unit. [Background technology]

[0002] Patent Document 1 discloses a lighting device (lighting fixture) that can be turned on in a fluctuating lighting mode. In the lighting device of Patent Document 1, in the fluctuating lighting mode, a control unit of the lighting device increases or decreases at least one of the luminous flux value and color temperature of the illumination light. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-48713 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the lighting device disclosed in Patent Document 1, the intensity of the luminous flux value or color temperature of the illumination light in the fluctuating lighting mode is monotonous, and therefore the relaxation effect may not be fully exerted.

[0005] The present disclosure aims to provide a lighting device and a control method that can improve the relaxation effect achieved by fluctuations in the light intensity of a light-emitting section. [Means for solving the problem]

[0006] A lighting device according to an aspect of the present disclosure includes a light-emitting unit and a control unit. The light-emitting unit includes a light source. The control unit controls the light-emitting unit. A period during which the control unit dynamically changes the light intensity of the light output from the light-emitting unit includes a first period and a second period. An average value of the light intensity of the light-emitting unit in the second period is greater than an average value of the light intensity of the light-emitting unit in the first period. A maximum value of the moving average of the light intensity of the light-emitting unit in the second period is greater than a maximum value of the moving average of the light intensity of the light-emitting unit in the first period.

[0007] A lighting device according to another aspect of the present disclosure includes a light-emitting unit and a control unit. The light-emitting unit includes a light source. The control unit controls the light-emitting unit. A period during which the control unit dynamically changes the light intensity of the light output from the light-emitting unit includes a first period and a second period. The light intensity of the light-emitting unit is such that a total sum of component intensities of light components with a frequency of 1 Hz or more in a second interval including at least a part of the second period is greater than a total sum of component intensities of light components with a frequency of 1 Hz or more in a first interval including at least a part of the first period. A maximum value of a moving average of the light intensity of the light-emitting unit in the second period is greater than a maximum value of a moving average of the light intensity of the light-emitting unit in the first period.

[0008] A control method according to one aspect of the present disclosure is a control method for controlling a light-emitting unit including a light source. A period during which the light intensity of light output from the light-emitting unit is dynamically changed by the control method includes a first period and a second period. An average value of the light intensity of the light-emitting unit in the second period is greater than an average value of the light intensity of the light-emitting unit in the first period. A maximum value of the moving average of the light intensity of the light-emitting unit in the second period is greater than a maximum value of the moving average of the light intensity of the light-emitting unit in the first period.

[0009] A control method according to another aspect of the present disclosure is a control method for controlling a light-emitting unit including a light source. A period during which the light intensity of the light output from the light-emitting unit is dynamically changed by the control method includes a first period and a second period. The light intensity of the light-emitting unit is such that a total sum of component intensities of light components with a frequency of 1 Hz or more in a second interval including at least a part of the second period is greater than a total sum of component intensities of light components with a frequency of 1 Hz or more in a first interval including at least a part of the first period. The maximum value of the moving average of the light intensity of the light-emitting unit in the second period is greater than the maximum value of the moving average of the light intensity of the light-emitting unit in the first period. Effect of the Invention

[0010] According to the lighting device and the control method according to the above aspects, it is possible to improve the relaxation effect caused by the fluctuation of the light intensity of the light-emitting section. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram showing a configuration of a lighting fixture according to the first embodiment. [Diagram 2] FIG. 2 is a graph showing a portion of the waveform of the light output pattern of the above lighting fixture. [Diagram 3] 3A and 3B are graphs showing frequency distributions of the light output pattern of the lighting device in the first and second periods, respectively. [Figure 4] FIG. 4 is a graph showing a portion of a moving average waveform of the light output pattern of the above lighting fixture. [Diagram 5] FIG. 5 is a graph showing a part of a waveform different from that of FIG. 2 of the light output pattern of the above lighting fixture. [Figure 6] FIG. 6 is a schematic diagram showing a method of calculating the frequency distribution in the above lighting fixture. [Figure 7] FIG. 7 is a graph showing a portion of the waveform of a light output pattern in a lighting device according to the second embodiment. [Figure 8] FIG. 8 is a graph showing a part of a moving average waveform of a light output pattern of a lighting device according to the third embodiment. [Figure 9] FIG. 9 is a block diagram showing a configuration of a lighting system including a plurality of lighting fixtures according to the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, lighting fixtures according to embodiments 1 to 4 will be described with reference to the drawings. Note that all of the drawings referred to in the following embodiments 1 to 4 are schematic drawings, and the ratios of sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0013] (Embodiment 1) 1. Lighting fixtures The lighting fixture 10 is, for example, a lighting stand or a spotlight. Note that the lighting fixture 10 is not limited to a lighting stand or a spotlight, and may be, for example, any lighting fixture such as a ceiling light.

[0014] As shown in FIG. 1, lighting device 10 includes control unit 11, storage unit 12, and light-emitting unit 21.

[0015] (1) Control section The control unit 11 controls the lighting of the light-emitting unit 21. More specifically, the control unit 11 controls the light-emitting unit 21 so that the light intensity L1 of the light output from the light-emitting unit 21 (hereinafter, abbreviated as "light intensity L1 of the light-emitting unit 21") changes dynamically. More specifically, the light intensity L1 of the light-emitting unit 21 changes dynamically as shown in the light output pattern 110 illustrated in FIG. 2. Here, the light intensity L1 of the light-emitting unit 21 changes dynamically means that the light intensity L1 of the light-emitting unit 21 changes over time. The change in the light intensity L1 of the light-emitting unit 21 is a periodic or non-periodic repetition of an increase and decrease in the light intensity L1, for example, a so-called fluctuation change. The light intensity L1 of the light-emitting unit 21 is, for example, the luminance of the light-emitting surface of the light-emitting unit 21. The control unit 11 outputs a dimming signal based on the light control pattern to the light-emitting unit 21. The dimming signal is, for example, a voltage value applied to the light source 22 of the light-emitting unit 21, and is generated by PWM (Pulse Width Modulation) control.

[0016] The light control pattern is, for example, data indicating the light intensity L1 of the light-emitting unit 21 for each time. The light control pattern is generated based on a plurality of partial patterns (two in FIG. 2). The partial patterns are stored in, for example, the storage unit 12.

[0017] (2) Storage section The storage unit 12 stores a plurality of partial patterns for generating a light control pattern. The control unit 11 generates a light control pattern by, for example, combining a plurality of partial patterns of finite length stored in the storage unit 12.

[0018] Each of the plurality of partial patterns includes, as a part or whole, a periodic waveform such as a sine wave, a triangular wave, or a rectangular wave. Also, each of the plurality of partial patterns includes, as a part or whole, a waveform obtained by combining a plurality of periodic waveforms having different frequencies. Note that each of the plurality of partial patterns may include, as a part thereof, a waveform in which the light intensity L1 does not change, or a waveform in which the light intensity L1 changes linearly.

[0019] (3) Light-emitting part As shown in Fig. 1, the light-emitting unit 21 includes a light source 22. The light source 22 is, for example, an LED light source that emits warm color light. The light-emitting unit 21 changes the light intensity L1 of the output light output by the light source 22 based on the control of the control unit 11. For example, the light-emitting unit 21 outputs light when a voltage indicated by a dimming signal output by the control unit 11 is applied to the light source 22. As a result, the light intensity L1 of the light-emitting unit 21 changes based on the light control pattern as shown in a light output pattern 110 (see Fig. 2).

[0020] (4) Other configurations of lighting fixtures The lighting fixture 10 includes a computer system. The computer system is mainly composed of a processor and a memory as hardware. The function of the lighting fixture 10 in the present disclosure is realized by the processor executing a program recorded in the memory of the computer system. The program may be pre-recorded in the memory of the computer system, provided through an electric communication line, or provided by recording it in a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by the computer system. The processor of the computer system is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or a large-scale integrated circuit (LSI). The integrated circuits such as IC or LSI referred to here are called by different names depending on the degree of integration, and include integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). Furthermore, a field-programmable gate array (FPGA) that is programmed after the manufacture of the LSI, or a logic device that can reconfigure the connection relationship inside the LSI or reconfigure the circuit partition inside the LSI, can also be adopted as a processor. The electronic circuits may be integrated in one chip or distributed across multiple chips. The multiple chips may be integrated into one device, or may be distributed across multiple devices. The computer system referred to here includes a microcontroller having one or more processors and one or more memories. Therefore, the microcontroller is also composed of one or more electronic circuits including a semiconductor integrated circuit or a large-scale integrated circuit.

[0021] Furthermore, it is not essential for lighting device 10 that multiple functions are concentrated in one housing, and the components of lighting device 10 may be distributed across multiple housings. Furthermore, at least some of the functions of lighting device 10, for example, some of the functions of control unit 11, may be realized by the cloud (cloud computing) or the like.

[0022] Conversely, at least some of the functions of lighting fixture 10 that are distributed across multiple components in embodiment 1 may be integrated into a single housing.

[0023] 2.Light emission control by the control unit The control of the light-emitting unit 21 by the control unit 11 will be described in more detail below.

[0024] (1) Overview of light output patterns The control unit 11 generates a light control pattern so that the light output pattern 110 shown in FIG.

[0025] The light output period during which the control unit 11 causes the light emitting unit 21 to emit light according to the light control pattern includes a plurality of first periods T1 (only one is shown in FIG. 2) and a plurality of second periods T2 (only one is shown in FIG. 2). Thus, the light output pattern 110 includes a plurality of first periods T1 and a plurality of second periods T2. Here, in the light output pattern 110, each of the plurality of first periods T1 does not overlap with any of the remaining first periods T1 and the plurality of second periods T2. Similarly, in the light output pattern 110, each of the plurality of second periods T2 does not overlap with any of the remaining second periods T2 and the plurality of first periods T1.

[0026] The length of each of the first period T1 and the second period T2 is equal to the reference period length. The reference period length is greater than or equal to 5 seconds and greater than or equal to 15 seconds. For example, in the light output pattern 110 shown in FIG. 2, the reference period length is 10 seconds. That is, in the light output pattern 110, the length of each of the first period T1 and the second period T2 is 10 seconds.

[0027] In the following description, a portion of the light output pattern 110 that corresponds one-to-one to each of the multiple first periods T1 is referred to as a first pattern 111. Also, a portion of the light output pattern 110 that corresponds one-to-one to each of the multiple second periods T2 is referred to as a second pattern 112. The first pattern 111 and the second pattern 112 shown in Fig. 2 are so-called fluctuation changes in which the light intensity L1 changes non-periodically. Note that the first pattern 111 and the second pattern 112 may be waveforms in which the light intensity L1 changes periodically, and may include a portion in which the light intensity L1 does not change or changes linearly.

[0028] Here, the multiple first patterns 111 are not necessarily the same as each other. For example, when the light output pattern 110 includes three first periods T1, the three first patterns 111 included in the light output pattern 110 may all be different, two specific ones may be the same, or all may be the same. Also, the multiple second patterns 112 are not necessarily the same as each other. Similarly, in this case, for example, when the light output pattern 110 includes three second periods T2, the three second patterns 112 included in the light output pattern 110 may all be different, two specific ones may be the same, or all may be the same.

[0029] The light intensity L1 of the light-emitting unit 21 in the first period T1 and the light intensity L1 of the light-emitting unit 21 in the second period T2 satisfy the first and second conditions shown below. Moreover, the light intensity L1 of the light-emitting unit 21 in the first period T1 and the light intensity L1 of the light-emitting unit 21 in the second period T2 satisfy the third condition shown below.

[0030] (2) Optical output As a first condition, as shown in Fig. 2, the average value La2 of the light intensity L1 in each of the second periods T2 is greater than the average value La1 of the light intensity L1 in each of the first periods T1. As a result, the average light intensity L1 of the light-emitting unit 21 differs between the second periods T2 and the first periods T1, and thus a different impression is given to people in the space illuminated by the lighting device 10 in each of the first periods T1 and the second periods T2.

[0031] Here, the average value La2 of the light intensity L1 in the second period T2 is preferably 1.1 times or more the average value La1 of the light intensity L1 in the first period T1. This gives a different impression from the fluctuation of the light intensity L1 in the second period T2 and the fluctuation of the light intensity L1 in the first period T1. Therefore, in the lighting device 10, the light output pattern 110 fluctuates in a complex manner rather than monotonously, so that the relaxation effect brought about by the fluctuation of the light intensity L1 can be improved. Moreover, it is more preferable that the average value La2 of the light intensity L1 in the second period T2 is 1.3 times or more the average value La1 of the light intensity L1 in the first period T1. This makes it easier to recognize the change in the average of the light intensity L1 over time in the light output pattern 110. Therefore, in the lighting device 10, the relaxation effect brought about by the fluctuation of the light intensity L1 can be further improved. Moreover, it is more preferable that the average value La2 of the light intensity L1 in the second period T2 is 1.5 times or more the average value La1 of the light intensity L1 in the first period T1. This makes the average change in the light intensity L1 of the light output pattern 110 over time more noticeable, and further improves the relaxing effect brought about by the fluctuation of the light intensity L1.

[0032] (3) Frequency (3.1) Relationship between frequencies in the first and second periods As a second condition, as shown in Figures 3A and 3B, the sum of the component intensities of light components with frequencies of 1 Hz or more in the conversion window 132 (see Figure 6) including the second period T2 is greater than the sum of the component intensities of light components with frequencies of 1 Hz or more in the conversion window 131 (see Figure 6) including the first period T1.

[0033] The second condition will be described in more detail below.

[0034] Fig. 3A is a graph showing a frequency distribution 121 of the light intensity L1 of the light-emitting unit 21 in the first period T1. More specifically, the frequency distribution 121 shown in Fig. 3A is a frequency distribution in a conversion window 131 (see Fig. 6) including the first period T1. The frequency distribution 121 is the component intensity (amplitude of the sine wave component) for each frequency of a sine wave when the waveform in the conversion window 131 of the first pattern 111 is shown as a combination of one or more light components that are sine waves. The relationship between the first pattern 111, the conversion window 131, and the frequency distribution 121 will be described in detail later.

[0035] 3B is a graph showing a frequency distribution 122 of the light intensity L1 of the light-emitting unit 21 in the second period T2. More specifically, the frequency distribution 122 shown in FIG. 3B is a frequency distribution in a conversion window 132 (see FIG. 6) including the second period T2. The frequency distribution 122 is the component intensity for each frequency of a sine wave when the waveform in the conversion window 132 of the second pattern 112 is displayed as a combination of one or more sine waves. The relationship between the second pattern 112, the conversion window 132, and the frequency distribution 122 will be described in detail later.

[0036] Here, each of the frequency distributions 121 and 122 is normalized so that the integral value of the light components with frequencies equal to or higher than 0 Hz, i.e., the total value of the component intensities for all frequencies, is a predetermined value. In other words, the component intensity for each frequency is proportional to the ratio of the light intensity of the light component of that frequency to the light intensity L1.

[0037] As a second condition, the sum of the component intensities of light components with frequencies of 1 Hz or more in the conversion window 132 including the second period T2 is greater than the sum of the component intensities of light components with frequencies of 1 Hz or more in the conversion window 131 including the first period T1.

[0038] The total component intensity of the light components with a frequency of 1 Hz or more in the conversion window 131 including the first period T1 is, for example, an integral value S1 with an integral range of 1 Hz or more for the frequency distribution 121, and is the area of ​​the region shown by dots in Fig. 3A. The total component intensity of the light components with a frequency of 1 Hz or more in the conversion window 132 including the second period T2 is, for example, an integral value S2 with an integral range of 1 Hz or more for the frequency distribution 122, and is the area of ​​the region shown by dots in Fig. 3B. That is, the integral value S2 with an integral range of 1 Hz or more for the frequency distribution 122 is greater than the integral value S1 with an integral range of 1 Hz or more for the frequency distribution 121. In other words, the proportion of one or more light components with a frequency of 1 Hz or more in the light intensity L1 is greater in the second period T2 than in the first period T1.

[0039] The total component intensity of the light components with a frequency of 1 Hz or more in the conversion window 131 including the first period T1 may be, for example, the sum of the component intensity of one or more light components corresponding to one or more peaks with a frequency of 1 Hz or more in the frequency distribution 121. If there is one peak with a frequency of 1 Hz or more in the frequency distribution 121, the total component intensity of the light components with a frequency of 1 Hz or more is the component intensity of the light components corresponding to the peak. Similarly, the total component intensity of the light components with a frequency of 1 Hz or more in the conversion window 132 including the second period T2 may be, for example, the sum of the component intensity of one or more light components corresponding to one or more peaks with a frequency of 1 Hz or more in the frequency distribution 122. If there is one peak with a frequency of 1 Hz or more in the frequency distribution 122, the total component intensity of the light components with a frequency of 1 Hz or more is the component intensity of the light components corresponding to the peak.

[0040] When light intensity L1 of lighting device 10 changes in light output pattern 110 that satisfies the second condition, the fluctuation of light intensity L1 of light-emitting unit 21 in second time period T2 has a higher proportion of components that change at 1 Hz or more than the fluctuation of light intensity L1 of light-emitting unit 21 in first time period T1. In other words, light intensity L1 of light-emitting unit 21 tends to change faster in second time period T2 than in first time period T1.

[0041] (3.2) Details of frequencies in the first and second periods The frequency distribution 121 of the light intensity L1 of the light-emitting section 21 in the first period T1 and the frequency distribution 122 of the light intensity L1 of the light-emitting section 21 in the second period T2 may have the following waveforms.

[0042] The upper limit frequency f2 of frequency distribution 122 is higher than the upper limit frequency f1 of frequency distribution 121. Here, the upper limit frequencies f1 and f2 refer to frequencies that satisfy the following condition: In frequency distribution 121, the component intensity of optical components having frequencies higher than the upper limit frequency f1 is 30% or less of the average component intensity of optical components having frequencies equal to or lower than the upper limit frequency f1.

[0043] Here, the average value of the component intensity of the light component having a frequency equal to or lower than the upper limit frequency f1 is the component intensity of the light component corresponding to the peak when there is only one peak whose frequency is lower than the upper limit frequency f1 in the frequency distribution 121. Also, the average value of the component intensity of the light component having a frequency equal to or lower than the upper limit frequency f1 is the average value of the component intensity of the light components corresponding to the multiple peaks when there are multiple peaks whose frequency is lower than the upper limit frequency f1 in the frequency distribution 121. Note that the average value of the component intensity of the light component having a frequency equal to or lower than the upper limit frequency f1 may be a value obtained by dividing an integral value having a frequency range from 0 Hz to the upper limit frequency f1 for the frequency distribution 121 by the value of the upper limit frequency f1. Also, it is possible that the component intensity of the component having a frequency higher than the upper limit frequency f1 in the frequency distribution 121 is 0, that is, the first pattern 111 in the first period T1 does not include a light component having a frequency higher than the upper limit frequency f1.

[0044] Similarly, in frequency distribution 122, the component intensity of light components having frequencies higher than the upper limit frequency f2 is 30% or less of the average value of the component intensity of light components having frequencies equal to or lower than the upper limit frequency f2. The method for calculating the average value of the component intensity of light components having frequencies equal to or lower than the upper limit frequency f2 is the same as the average value of the component intensity of light components having frequencies equal to or lower than the upper limit frequency f1, and therefore will not be described here. Also, in frequency distribution 122, the component intensity of components having frequencies higher than the upper limit frequency f2 may be 0, i.e., the second pattern 112 in the second period T2 may not include light components having frequencies higher than the upper limit frequency f2.

[0045] Moreover, it is preferable that the upper limit frequency f2 is 1 Hz or more higher than the upper limit frequency f1. This makes it easier to notice that the light intensity L1 in the second time period T2 contains light components whose frequencies are higher than the upper limit frequency f1. This makes it easier to detect changes in the fluctuating frequency of the light intensity L1, which makes it easier to evoke natural flickering, such as the flickering of a flame, and improves the relaxing effect brought about by the lighting device 10.

[0046] Moreover, the upper limit frequency f1 is preferably 5 Hz or less. This makes it easier to prevent a situation in which the fluctuation of the light intensity L1 is recognized as flickering or reminds the user of an incandescent light bulb with a broken filament, thereby reducing the relaxation effect. In the lighting device 10 according to the first embodiment, the upper limit frequency f1 is 2 Hz, as shown in FIG. 3A.

[0047] Moreover, the upper limit frequency f2 is preferably 3 Hz or more and 8 Hz or less. This reduces the impression that the fluctuations in the light intensity L1 of the light-emitting unit 21 give the same impression in the second period T2 and the first period T1, and improves the relaxation effect provided by the lighting device 10. Also in the second period T2, the fluctuations in the light intensity L1 in the second period T2 are not excessively intense, so that the relaxation effect provided by the lighting device 10 can be improved. In the lighting device 10 according to the first embodiment, the upper limit frequency f2 is 4 Hz, as shown in FIG. 3B. Therefore, the upper limit frequency f2 is 1 Hz or more higher than the upper limit frequency f1.

[0048] (4) Moving average of light intensity As a third condition, as shown in FIG. 4, the maximum value L2x of the moving average 142 of the light intensity L1 of the light-emitting section 21 in the second period T2 is greater than the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting section 21 in the first period T1.

[0049] Here, the moving average 140 of the light intensity L1 of the light-emitting unit 21 refers to the light intensity L1 of the light-emitting unit 21 at each time point being associated with an average value from a predetermined time before that time point to that time point. In the moving average 140 of the light intensity L1 of the light-emitting unit 21, a portion corresponding to each of the multiple first periods T1 is referred to as moving average 141, and a portion corresponding to each of the multiple second periods T2 is referred to as moving average 142. The predetermined time is, for example, 0.5 seconds or more and 1 second or less. In the moving average 140 shown in FIG. 4, the predetermined time is 0.5 seconds.

[0050] That is, the moving average 140 of the light intensity L1 of the light-emitting unit 21 changes gradually with respect to the light output pattern 110 (see FIG. 2) at the same time. In particular, when the light output pattern 110 includes a very short-term change, the change is not easily reflected in the moving average 140. For example, when the first pattern 111 of the light intensity L1 of the light-emitting unit 21 has a very short-term peak 111p as shown in FIG. 5, the influence of the peak 111p on the moving average 141 is very small. The peak 111p may be generated intentionally using a light control pattern, or may occur accidentally due to noise or the like generated in the control unit 11. In the impression of the fluctuation of the light intensity L1 of the light-emitting unit 21 in the first period T1 or the second period T2, a very short-term change such as the peak 111p hardly contributes. 5 and, for example, when the continuous time during which light is emitted at the same light intensity L1 as peak 111p is 2 seconds, the impression of the fluctuation of light intensity L1 of light-emitting unit 21 is clearly different. Since the third condition is a conditioning based on the impression of the fluctuation of light intensity L1 of light-emitting unit 21, the maximum and minimum values ​​of the moving average 140 of light intensity L1 of light-emitting unit 21 are used for conditioning, rather than the maximum and minimum values ​​of light intensity L1 of light-emitting unit 21. As a result, even if an extremely short-term change such as peak 111p is included in light output pattern 110, it does not affect the determination of the third condition.

[0051] By satisfying the third condition described above, the fluctuation of the light intensity L1 in the second period T2 satisfies the conditions that the maximum value of the moving average of the light intensity L1 is larger and the average of the light intensity L1 is larger than the fluctuation of the light intensity L1 in the first period T1. Also, the fluctuation of the light intensity L1 in the second period T2 satisfies the conditions that the maximum value of the moving average of the light intensity L1 is larger and the proportion of light components with a frequency of 1 Hz or more is larger than the fluctuation of the light intensity L1 in the first period T1. As a result, the impression given by the fluctuation of the light intensity L1 of the light-emitting unit 21 is different between the first period T1 and the second period T2, so that the fluctuation is not monotonous but irregular enough to be felt as a natural fluctuation.

[0052] 4, the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1 is equal to or greater than the minimum value L2n of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2. In contrast, when the maximum value L1x of the moving average 141 is less than the minimum value L2n of the moving average 142, for example, the range of possible values ​​of the moving average 141 and the range of possible values ​​of the moving average 142 do not overlap, so that when the first period T1 and the second period T2 are consecutive, a sudden change in the light intensity L1 occurs at the boundary between the first period T1 and the second period T2. On the other hand, if the maximum value L1x of the moving average 141 is equal to or greater than the minimum value L2n of the moving average 142, a part of the range of values ​​that the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1 can take overlaps with a part of the range of values ​​that the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2 can take. This means that when switching from the first period T1 to the second period T2, or when switching from the second period T2 to the first period T1, a sudden change in the light intensity L1 does not necessarily occur. Therefore, the change in the light intensity L1 due to the light output pattern 110 can evoke a natural fluctuation.

[0053] Moreover, the minimum value L1n of the moving average 141 of the light intensity L1 of the light-emitting section 21 in the first period T1 is larger than the minimum value L2n of the moving average 142 of the light intensity L1 of the light-emitting section 21 in the second period T2. As a result, the range from the minimum value L1n to the maximum value L1x of the moving average 141 is included in the range from the minimum value L2n to the maximum value L2x of the moving average 142. Therefore, the possible range of the moving average 142 of the light intensity L1 in the second period T2 includes the possible range of the moving average 141 of the light intensity L1 in the first period T1, and is wider than the possible range of the moving average 141. That is, the variation range of the light intensity L1 in the second period T2 is wider than that in the first period T1. As a result, the change in the fluctuation of the light intensity L1 is more easily noticed between the first period T1 and the second period T2, and the attention is increased.

[0054] Moreover, it is preferable that the ratio (L1x / L1n) of the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1 to the minimum value L1n is larger than the ratio (L2x / L2n) of the maximum value L2x of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2. The ratio (L1x / L1n) of the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1 to the minimum value L1n corresponds to a first intensity ratio. The ratio (L2x / L2n) of the maximum value L2x of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2 corresponds to a second intensity ratio. As a result, while the maximum value L2x of the moving average 142 of the light intensity L1 is large in the second period T2, the ratio of the maximum value L2x to the minimum value L2n is small. That is, in the second time period T2, the maximum value of light intensity L1 is large but the range of change is small, and drastic changes in light intensity L1 are suppressed. Meanwhile, in the first time period T1, the maximum value L1x of the moving average 141 of light intensity L1 is small but the ratio of the maximum value L1x to the minimum value L1n is large. That is, in the first time period T1, the maximum value of light intensity L1 is small but the range of change is large, and the change in light intensity L1 is easy to see. Therefore, in lighting device 10, the fluctuation change in light intensity L1 is easily recognized, and a relaxing effect is exerted.

[0055] Note that the ratio (L2x / L2n) of the maximum value L2x of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second time period T2 to the minimum value L2n may be greater than the ratio (L1x / L1n) of the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first time period T1 to the minimum value L1n. In this case, the fluctuation of the light intensity L1 in the second time period T2 gives an impression of being more intense than the fluctuation of the light intensity L1 in the first time period T1. Therefore, in the lighting device 10, the change in light intensity L1 gives an impression of vibrancy, and an eye-catching effect is obtained.

[0056] Here, it is preferable that the ratio (L1x / L1n) of the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1 to the minimum value L1n is not less than 1.1 and not more than 8. This allows the light intensity L1 to change to an easily noticeable degree in the first period T1, and reduces discomfort caused by the change being recognized as flickering.

[0057] Furthermore, the ratio (L2x / L2n) of the maximum value L2x of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2 to the minimum value L2n is preferably equal to or greater than 1.5 and equal to or less than 10. This makes it possible to reduce discomfort caused by the light intensity L1 changing to such an extent that a dynamic change is felt in the second period T2 and being mistaken for a malfunction.

[0058] (5) Frequency analysis of the first and second periods FIG. 6 is a schematic diagram showing the relationship between the light output pattern 110, the conversion windows 130-132, and the frequency distribution. In FIG. 6, the conversion windows 130-132 indicate a time domain corresponding to the frequency distribution. The frequency distribution is obtained by Fourier transforming the portion of the light output pattern 110 located within the conversion window 130. The time length W1 of the conversion window 130 is 2 seconds or more and 30 seconds or less. Moreover, the time length W1 of the conversion window 130 is preferably 5 seconds or more and 20 seconds or less. The time length W1 of the conversion window 130 is, for example, 10 seconds.

[0059] When generating the frequency distribution of the light output pattern 110, for example, the value of the light intensity L1 included in the conversion window 130 is Fourier transformed to calculate a frequency distribution at the time corresponding to the position of the conversion window 130. The time corresponding to the position of the conversion window 130 is, for example, the time at the center of the conversion window 130. Note that the time corresponding to the position of the conversion window 130 may be, for example, the start time of the conversion window 130 or the end time of the conversion window 130.

[0060] Then, the start time of conversion window 130 is changed by a predetermined time width, and the process of generating a frequency distribution is repeated. As a result, a frequency distribution corresponding to all time periods of light output pattern 110 is obtained. The predetermined time width is, for example, 0.05 seconds or more and 5 seconds or less. Using the frequency distribution obtained by the above process, light output pattern 110 can be divided into units of 10 seconds, which is the reference interval length, and it can be determined whether each interval corresponds to first period T1 or second period T2. As a result, it can be determined whether light output pattern 110 of lighting device 10 satisfies the above-mentioned conditions.

[0061] Here, in FIG. 6, one of the possible positions of the conversion window 130 is shown as the conversion window 130, and two of the special positions of the conversion window 130 shown below are shown as the conversion window 131 and the conversion window 132. That is, the multiple positions of the conversion window 130 include the conversion window 130, the conversion window 131, and the conversion window 132 in FIG. 6. The conversion window 131 includes the first period T1 and corresponds to the first section. Moreover, the conversion window 132 includes the second period T2 and corresponds to the second section. Note that, when the width of the conversion window 130 and the reference section length are different, they can be handled as follows. For example, when it can be determined that 50% or more of the width of the conversion window 130 is a part of the first period T1, it can be said that the range of the conversion window 130 is at least a part of the first period T1. Similarly, when it can be determined that 50% or more of the width of the conversion window 130 is the second period T2, it can be said that the range of the conversion window 130 is at least a part of the second period T2. When the range of the conversion window 130 spans both the first period T1 and the second period T2, the corresponding frequency distribution is a linear combination of the frequency distribution of the first period T1 and the frequency distribution of the second period T2. The ratio of the linear combination of the frequency distribution of the first period T1 and the frequency distribution of the second period T2 corresponds to the time ratio of the first period T1 to the second period T2 in the range of the conversion window 130. Therefore, when 50% or more of the width of the conversion window 130 is the first period T1, the corresponding frequency distribution includes 50% or more of the frequency distribution of the first period T1 as a component. Similarly, when 50% or more of the width of the conversion window 130 is the second period T2, the corresponding frequency distribution includes 50% or more of the frequency distribution of the second period T2 as a component.

[0062] 3.Effects The lighting device 10 according to the first embodiment includes a light-emitting unit 21 and a control unit 11. The light-emitting unit 21 includes a light source 22. The control unit 11 controls the light-emitting unit 21. The period during which the control unit 11 dynamically changes the light intensity L1 of the light output from the light-emitting unit 21 includes a first period T1 and a second period T2. The average value La2 of the light intensity L1 of the light-emitting unit 21 in the second period T2 is greater than the average value La1 of the light intensity L1 of the light-emitting unit 21 in the first period T1. The maximum value L2x of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2 is greater than the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1. As a result, the range of fluctuation of the light intensity L1 of the light-emitting unit 21 differs between the first period T1 and the second period T2, and therefore the impression given by the light-emitting unit 21 differs between the first period T1 and the second period T2. Therefore, the fluctuation of light intensity L1 of light-emitting section 21 of lighting device 10 becomes a natural fluctuation.

[0063] In addition, in the lighting device 10 according to the first embodiment, the light intensity L1 of the light-emitting unit 21 is such that the integral value S2 of the light components with a frequency of 1 Hz or more in the conversion window 132 including the second period T2 is greater than the integral value S1 of the light components with a frequency of 1 Hz or more in the conversion window 131 including the first period T1. As a result, the frequency distribution of the light intensity L1 of the light-emitting unit 21 differs between the first period T1 and the second period T2, and therefore the impression given by the light intensity L1 of the light-emitting unit 21 differs between the first period T1 and the second period T2. Therefore, the fluctuation of the light intensity L1 of the light-emitting unit 21 of the lighting device 10 becomes a natural fluctuation.

[0064] Furthermore, in the lighting device according to the first embodiment, the minimum value L2n of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2 is smaller than the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1. This makes it difficult for abrupt changes in the light intensity L1 to occur when switching from the first period T1 to the second period T2, and when switching from the second period T2 to the first period T1. Therefore, the change in the light intensity L1 caused by the light output pattern 110 can evoke a natural fluctuation.

[0065] In addition, in the lighting device 10 according to the first embodiment, the ratio of the maximum value L1x of the moving average 141 of the light intensity L1 of the light-emitting unit 21 to the minimum value L1n in the first period T1 is larger than the ratio of the maximum value L2x of the moving average 142 of the light intensity L1 of the light-emitting unit 21 to the minimum value L2n in the second period T2. As a result, in the second period T2, the maximum value L2x of the moving average 142 of the light intensity L1 is large, while the ratio of the maximum value L2x to the minimum value L2n is small. That is, in the second period T2, the maximum value of the light intensity L1 is large, while the range of change is small, and the drastic change of the light intensity L1 is suppressed. On the other hand, in the first period T1, the maximum value L1x of the moving average 141 of the light intensity L1 is small, while the ratio of the maximum value L1x to the minimum value L1n is large. That is, in the first period T1, the maximum value of the light intensity L1 is small, while the range of change is large, and the change of the light intensity L1 is easy to understand. Therefore, in lighting device 10, fluctuations in light intensity L1 are easily noticeable, and a relaxing effect is achieved.

[0066] Furthermore, in the lighting device 10 according to the first embodiment, the second frequency f2, which is the upper limit frequency of the light intensity L1 of the light-emitting unit 21 in the second period T2, is higher than the first frequency f1, which is the upper limit frequency of the light intensity L1 of the light-emitting unit 21 in the first period T1. This makes the difference between the fluctuation of the light intensity L1 in the first period T1 and the fluctuation of the light intensity L1 in the second period T2 more distinct. Therefore, for example, the fluctuation of the light intensity L1 becomes closer to a natural fluctuation such as a flickering flame, and the relaxing effect brought about by the lighting device 10 can be improved.

[0067] (Embodiment 2) 1. Configuration In lighting device 10 according to the second embodiment, the period length of each of the multiple first periods T1 and the multiple second periods T2 is variable.

[0068] In lighting device 10 according to the second embodiment, the length of each of the multiple first periods T1 and the multiple second periods T2 is an integer multiple of the reference period length. For example, if the reference period length is 10 seconds, the length of each of the multiple first periods T1 and the multiple second periods T2 is an integer multiple of 10 seconds.

[0069] 7 shows a portion of the waveform of light output pattern 110 of lighting device 10 according to embodiment 2. Here, the time between times t1 and t2, the time between times t2 and t3, the time between times t3 and t4, and the time between times t4 and t5 are each 10 seconds, which is the reference interval length. Each of periods T11 and T12 corresponds to the first period T1 when the period length of the first period T1 is 10 seconds. Furthermore, each of periods T21 and T22 corresponds to the second period T2 when the period length of the second period T2 is 10 seconds.

[0070] In lighting device 10 according to embodiment 2, when consecutive periods that could correspond to first period T1 (periods T11 and T12 in FIG. 7) are present, if these periods satisfy either the fourth or fifth condition below, then these periods are treated as a single first period T1. In the example of FIG. 7, periods T11 and T12 are treated as a single first period T1.

[0071] The fourth condition is that the difference in average output in the light intensity L1 of the light-emitting unit 21 among a plurality of periods is 1 / 3 or less of the average output in one period. More specifically, if the difference between the average value of the light intensity L1 of the light-emitting unit 21 in period T11 and the average value of the light intensity L1 of the light-emitting unit 21 in period T12 is 1 / 3 or less of the average value of the light intensity L1 of the light-emitting unit 21 in period T11, the period from time t3 to time t5 is set as the first period T1. In this case, the period length of the first period T1 is 20 seconds.

[0072] The fifth condition is that the difference between the integral value S1 (see FIG. 3A) in the frequency distribution with an integral range of 1 Hz or more in the corresponding frequency distribution among a plurality of periods is 1 / 3 or less of the integral value S1 in one period. More specifically, if the difference between the integral value S1 in the frequency distribution with an integral range of 1 Hz or more in the frequency distribution corresponding to the period T11 and the integral value S1 in the frequency distribution with an integral range of 1 Hz or more in the frequency distribution corresponding to the period T12 is 1 / 3 or less of the integral value S1 in the frequency distribution with an integral range of 1 Hz or more in the frequency distribution corresponding to the period T11, the period from time t3 to time t5 is set as the first period T1. In this case, the period length of the first period T1 is 20 seconds.

[0073] Similarly, in lighting device 10 according to embodiment 2, when consecutive periods that could correspond to second period T2 (periods T21 and T22 in FIG. 7) are consecutive, if these periods satisfy either the fourth or fifth condition described above, then these periods are treated as a single second period T2. In the example of FIG. 7, periods T21 and T22 are treated as a single second period T2.

[0074] In other words, as the fourth condition, if the difference between the average value of the light intensity L1 of the light-emitting unit 21 in the period T21 and the average value of the light intensity L1 of the light-emitting unit 21 in the period T22 is less than 1 / 3 of the average value of the light intensity L1 of the light-emitting unit 21 in the period T21, the period from time t1 to time t3 is the second period T2.

[0075] As a fifth condition, if the difference between the integral value S2 having an integration range of 1 Hz or more in the frequency distribution corresponding to the period T21 and the integral value S2 having an integration range of 1 Hz or more in the frequency distribution corresponding to the period T22 is less than 1 / 3 of the integral value S2 having an integration range of 1 Hz or more in the frequency distribution corresponding to the period T21, then the period from time t1 to time t3 is the second period T2.

[0076] The second period T2 having a period length of 20 seconds and the first period T1 having a period length of 20 seconds satisfy the first condition, the second condition, and the third condition described in the first embodiment. That is, as the first condition, the average value La2 of the light intensity L1 in the second period T2 is greater than the average value La1 of the light intensity L1 in each of the first periods T1. The same applies to the second and third conditions.

[0077] As a result, even if the first period T1 and the second period T2 have different period lengths, the change in light intensity L1 caused by the light output pattern 110 can evoke natural fluctuations, as in the first embodiment.

[0078] Here, the length of the first period T1 is preferably 0.1 seconds or more and 120 seconds or less. This allows the second period T2, in which the change in light intensity L1 of the light-emitting unit 21 is more intense than the first period T1, to occur at least once within a continuous two minutes. Therefore, the change in light intensity L1 by the light output pattern 110 is not too gentle but changes appropriately, improving the relaxation effect.

[0079] Moreover, the duration of the second period T2 is preferably 0.1 seconds or more and 40 seconds or less. For example, since it is rare for drastic changes in a natural flame to continue for more than 40 seconds, this configuration makes it possible to reduce the occurrence of discomfort caused by unnatural changes in the light intensity L1 due to the light output pattern 110.

[0080] 2.Effects In the lighting device 10 according to the second embodiment, the duration of the second time period T2 is 40 seconds or less, which can reduce the sense of discomfort caused by the unnatural change in light intensity L1 caused by the light output pattern 110.

[0081] In addition, in the lighting device 10 according to the second embodiment, the length of the first period T1 is 120 seconds or less. As a result, the second period T2, in which the change in the light intensity L1 of the light-emitting unit 21 is more rapid than the change in the first period T1, occurs at least once within two consecutive minutes. Therefore, the change in the light intensity L1 caused by the light output pattern 110 is not too gentle but moderate, improving the relaxation effect.

[0082] (Embodiment 3) In the lighting device 10 of embodiment 3, the relationship between the minimum value L1n of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1 and the minimum value L2n of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2 differs from that of embodiment 1.

[0083] 8, in the lighting device 10 according to the third embodiment, the minimum value L1n of the moving average 141 of the light intensity L1 of the light-emitting unit 21 in the first period T1 is equal to or smaller than the minimum value L2n of the moving average 142 of the light intensity L1 of the light-emitting unit 21 in the second period T2. This makes the fluctuation of the light intensity L1 gentler between the first period T1 and the second period T2. Therefore, even if a person stays for a long time in a space illuminated by the lighting device 10 according to the third embodiment, the person is unlikely to feel uncomfortable, and the lighting device 10 according to the third embodiment is suitable for lighting and staging in places where people stay for a long time.

[0084] (Embodiment 4) A lighting fixture 10 according to the fourth embodiment is used in a lighting system 1. As shown in Fig. 9, the lighting system 1 includes a plurality of lighting fixtures 10 (three in the illustrated example) and a control device 30. Each of the lighting fixtures 10 has a similar configuration.

[0085] Controller 30 controls each of the multiple lighting devices 10. More specifically, controller 30 instructs controller 11 of each of the multiple lighting devices 10 on the content of a light control pattern for generating light output pattern 110, the start timing of control of light-emitting unit 21, or the start timing of first period T1 or second period T2.

[0086] For example, control device 30 controls multiple lighting fixtures 10 to synchronize the multiple lighting fixtures 10 and align the changes in light intensity L1 of light-emitting unit 21. In this way, multiple lighting fixtures 10 can be treated as a single lighting fixture, making it possible to provide a unified and eye-catching presentation.

[0087] Furthermore, for example, the control device 30 controls the multiple lighting fixtures 10 so that the contents of the light control patterns for generating the light output patterns 110 in the multiple lighting fixtures 10 or the start timings of control of the light-emitting units 21 are made different from one another. As a result, the multiple lighting fixtures 10 are controlled so that the changes in the light intensities L1 of the light-emitting units 21 are not synchronized. As a result, the light intensities L1 of the light-emitting units 21 in the multiple lighting fixtures 10 are different from one another, making it possible to create a natural presentation that does not give an artificial impression. Furthermore, the lighting system 1 as a whole can provide a wide variety of presentations.

[0088] Furthermore, for example, the control device 30 controls the lighting fixtures 10 arranged in a line so that the start timing of the control of the light-emitting unit 21 using the same light output pattern 110 is shifted by an error time. The error time is set to, for example, about 0.2 seconds to 5 seconds between adjacent lighting fixtures 10. This results in an effect in which the lighting fixtures 10 arranged in a line operate sequentially in the line direction, making it possible to perform an effect that guides an observer along the line direction of the lighting fixtures 10, for example. Therefore, the lighting system 1 can be used, for example, to explain the route at an event or to reduce people's stagnation.

[0089] (Other Modifications of the Embodiment) (1) In lighting device 10 according to embodiments 1 to 4, light output pattern 110 satisfies all of conditions 1 to 3, but it is sufficient for light output pattern 110 to satisfy at least one of conditions 1 and 2. That is, in lighting device 10 according to embodiments, light output pattern 110 may satisfy conditions 1 and 3, or may satisfy conditions 2 and 3.

[0090] (2) Although the lighting device 10 according to the first to fourth embodiments includes one light-emitting unit 21, the lighting device 10 may include multiple light-emitting units 21. In this case, the multiple light-emitting units 21 may be synchronously turned on, or, as in the case of the multiple lighting devices 10 according to the fourth embodiment, the multiple light-emitting units 21 may be turned on independently.

[0091] (3) In the lighting system 1 of embodiment 4, the multiple lighting devices 10 have the same configuration. However, for example, the lighting devices included in the lighting system 1 may have different light emission colors of their light-emitting elements, or may have different numbers of light-emitting elements and different maximum and minimum light intensities.

[0092] (4) Although lighting device 10 according to embodiments 1 to 4 includes memory unit 12 and control unit 11 generates a light control pattern based on partial patterns stored in memory unit 12, lighting device 10 may also include a calculation unit that generates the light control pattern by calculation based on, for example, a sine wave, a rectangular wave, a triangular wave, etc. In this case, memory unit 12 may store parameters to be used in the calculation.

[0093] (5) In lighting device 10 according to embodiments 1 to 4, the period during which controller 11 dynamically changes light intensity L1 of light-emitting unit 21 includes multiple first periods T1 and multiple second periods T2, but there may be only one first period T1 or only one second period T2. Furthermore, the period during which controller 11 dynamically changes light intensity L1 of light-emitting unit 21 may include a period that does not fall into either the first period T1 or the second period T2.

[0094] (Aspect) A lighting device (10) according to a first aspect includes a light-emitting unit (21) and a control unit (11). The light-emitting unit (21) includes a light source (22). The control unit (11) controls the light-emitting unit (21). A period during which the control unit (11) dynamically changes the light intensity (L1) of the light output from the light-emitting unit (21) includes a first period (T1) and a second period (T2). An average value (La2) of the light intensity (L1) of the light-emitting unit (21) in the second period (T2) is greater than an average value (La1) of the light intensity (L1) of the light-emitting unit (21) in the first period (T1). A maximum value (L2x) of a moving average (142) of the light intensity (L1) of the light-emitting unit (21) in the second period (T2) is greater than a maximum value (L1x) of a moving average (141) of the light intensity (L1) of the light-emitting unit (21) in the first period (T1).

[0095] In the lighting device (10) according to the above aspect, the range of fluctuation of the light intensity (L1) of the light-emitting unit (21) differs between the first period (T1) and the second period (T2), and therefore the impression given by the light-emitting unit (21) differs between the first period (T1) and the second period (T2). Therefore, the fluctuation of the light intensity (L1) of the light-emitting unit (21) of the lighting device (10) becomes a natural fluctuation.

[0096] A lighting device (10) according to a second aspect includes a light-emitting unit (21) and a control unit (11). The light-emitting unit (21) includes a light source (22). The control unit (11) controls the light-emitting unit (21). A period during which the control unit (11) dynamically changes the light intensity (L1) of the light output from the light-emitting unit (21) includes a first period (T1) and a second period (T2). In the light intensity (L1) of the light-emitting unit (21), a total sum (S2) of component intensities of light components with frequencies of 1 Hz or more in a second interval (132) is greater than a total sum (S1) of component intensities of light components with frequencies of 1 Hz or more in a first interval (131). The second interval (132) includes at least a portion of the second period (T2). The first interval (131) includes at least a portion of the first period (T1). The average value (La2) of the light intensity (L1) of the light-emitting unit (21) in the second time period (T2) is greater than the average value (La1) of the light intensity (L1) of the light-emitting unit (21) in the first time period (T1). The maximum value (L2x) of the moving average (142) of the light intensity (L1) of the light-emitting unit (21) in the second time period (T2) is greater than the maximum value (L1x) of the moving average (141) of the light intensity (L1) of the light-emitting unit (21) in the first time period (T1).

[0097] In the lighting device (10) according to the above aspect, the frequency distribution and average value of the light intensity (L1) of the light-emitting unit (21) differ between the first period (T1) and the second period (T2), and therefore the impression given by the light-emitting unit (21) differs between the first period (T1) and the second period (T2). Therefore, the fluctuation of the light intensity (L1) of the light-emitting unit (21) of the lighting device (10) is more intense in the second period (T2) than in the first period (T1), resulting in a natural fluctuation.

[0098] In the lighting device (10) according to the third aspect, in the second aspect, the average value (La2) of the light intensity (L1) of the light-emitting unit (21) in the second time period (T2) is greater than the average value (La1) of the light intensity (L1) of the light-emitting unit (21) in the first time period (T1).

[0099] In the lighting device (10) according to the above aspect, the average light intensity (L1) is greater in the second time period (T2) than in the first time period (T1), and therefore the difference in impression given by the light intensity (L1) of the light-emitting unit (21) becomes greater between the first time period (T1) and the second time period (T2). Therefore, the fluctuation in the light intensity (L1) of the light-emitting unit (21) of the lighting device (10) becomes natural and brings about a sense of relaxation.

[0100] In the lighting device (10) of the fourth aspect, in any of the first to third aspects, the minimum value (L2n) of the moving average (142) of the light intensity (L1) of the light-emitting unit (21) in the second time period (T2) is smaller than the maximum value (L1x) of the moving average (141) of the light intensity (L1) of the light-emitting unit (21) in the first time period (T1).

[0101] In the lighting device (10) according to the above aspect, abrupt changes in the light intensity (L1) are unlikely to occur when switching from the first period (T1) to the second period (T2) and when switching from the second period (T2) to the first period (T1). Therefore, the change in the light intensity (L1) of the light-emitting unit (21) can evoke a natural fluctuation.

[0102] In a lighting device (10) according to a fifth aspect, in any one of the first to fourth aspects, the length of the second time period (T2) is 40 seconds or less.

[0103] The lighting fixture (10) according to the above aspect can reduce the discomfort felt by the unnatural change in the light intensity (L1) of the light-emitting portion (21) that is unlikely to occur in a natural flame, for example.

[0104] In a lighting device (10) according to a sixth aspect, in any one of the first to fifth aspects, the length of the first period (T1) is 120 seconds or less.

[0105] In the lighting device (10) according to the above aspect, the second period (T2), in which the change in the light intensity (L1) of the light-emitting unit (21) is more rapid than the change in the first period (T1), occurs at least once within two consecutive minutes. Therefore, the change in the light intensity (L1) of the light-emitting unit (21) is not too gentle but moderate, improving the relaxation effect.

[0106] In a lighting device (10) according to the seventh aspect, in any of the first to sixth aspects, a first intensity ratio which is the ratio of the maximum value (L1x) of the moving average (141) of the light intensity (L1) of the light-emitting section (21) in a first time period (T1) to the minimum value (L1n) is greater than a second intensity ratio which is the ratio of the maximum value (L2x) of the moving average (142) of the light intensity (L1) of the light-emitting section (21) in a second time period (T2) to the minimum value (L2n).

[0107] In the lighting device (10) according to the above aspect, in the second time period (T2), the maximum value (L2x) of the moving average (142) of the light intensity (L1) of the light-emitting unit (21) is large, but the ratio of the maximum value (L2x) to the minimum value (L2n) is small, so that drastic changes in the light intensity (L1) are suppressed. On the other hand, in the lighting device (10) according to the above aspect, in the first time period (T1), the maximum value (L1x) of the moving average (141) of the light intensity (L1) of the light-emitting unit (21) is small, but the ratio of the maximum value (L1x) to the minimum value (L1n) is large, so that changes in the light intensity (L1) are easily noticeable. Therefore, in the lighting device (10), the fluctuation changes in the light intensity (L1) of the light-emitting unit (21) are easily noticeable, and a relaxing effect is exerted.

[0108] In the lighting device (10) according to an eighth aspect, in any of the first to seventh aspects, the second frequency (f2) is greater than the first frequency (f1). The second frequency (f2) is an upper limit frequency of the light intensity (L1) of the light-emitting unit (21) in the second time period (T2). The first frequency (f1) is an upper limit frequency of the light intensity (L1) of the light-emitting unit (21) in the first time period (T1).

[0109] In the lighting device (10) according to the above aspect, the difference between the fluctuation of the light intensity (L1) in the first time period (T1) and the fluctuation of the light intensity (L1) in the second time period (T2) becomes clearer. Therefore, for example, the fluctuation of the light intensity (L1) becomes closer to a natural fluctuation such as a flickering flame, and it is possible to improve the relaxing effect brought about by the lighting device (10).

[0110] A control method according to a ninth aspect is a control method for controlling a light-emitting unit (21) including a light source (22). A period during which the light intensity (L1) of light output from the light-emitting unit (21) is dynamically changed by the control method includes a first period (T1) and a second period (T2). An average value (La2) of the light intensity (L1) of the light-emitting unit (21) in the second period (T2) is greater than an average value (La1) of the light intensity (L1) of the light-emitting unit (21) in the first period (T1). A maximum value (L2x) of a moving average (142) of the light intensity (L1) of the light-emitting unit (21) in the second period (T2) is greater than a maximum value of a moving average (141) of the light intensity (L1) of the light-emitting unit (21) in the first period (T1).

[0111] In the lighting device (10) according to the above aspect, the range of fluctuation of the light intensity (L1) of the light-emitting unit (21) differs between the first period (T1) and the second period (T2), and therefore the impression given by the light-emitting unit (21) differs between the first period (T1) and the second period (T2). Therefore, the fluctuation of the light intensity (L1) of the light-emitting unit (21) of the lighting device (10) becomes a natural fluctuation.

[0112] A control method according to a tenth aspect is a control method for controlling a light-emitting unit (21) including a light source (22). A period during which the light intensity (L1) of the light output from the light-emitting unit (21) is dynamically changed by the control method includes a first period (T1) and a second period (T2). Regarding the light intensity (L1) of the light-emitting unit (21), a total sum (S2) of component intensities of light components with frequencies of 1 Hz or more in a second section (132) including at least a part of the second period (T2) is greater than a total sum (S1) of component intensities of light components with frequencies of 1 Hz or more in a first section (131) including at least a part of the first period (T1). A maximum value (L2x) of a moving average (142) of the light intensity (L1) of the light-emitting unit (21) in the second period (T2) is greater than a maximum value (L1x) of a moving average (141) of the light intensity (L1) of the light-emitting unit (21) in the first period (T1).

[0113] According to the control method of the above aspect, the frequency distribution and average value of the light intensity (L1) of the light-emitting unit (21) differ between the first period (T1) and the second period (T2), and therefore the impression given by the light-emitting unit (21) differs between the first period (T1) and the second period (T2). Therefore, the fluctuation of the light intensity (L1) of the light-emitting unit (21) is more intense in the second period (T2) than in the first period (T1), resulting in a natural fluctuation.

[0114] A control method according to an eleventh aspect is the tenth aspect, wherein an average value (La2) of the light intensity (L1) of the light-emitting unit (21) in the second period (T2) is greater than an average value (La1) of the light intensity (L1) of the light-emitting unit (21) in the first period (T1).

[0115] According to the control method of the above aspect, since the average light intensity (L1) is greater in the second period (T2) than in the first period (T1), the difference in impression given by the light intensity (L1) of the light-emitting unit (21) becomes greater between the first period (T1) and the second period (T2). Therefore, the fluctuation of the light intensity (L1) of the light-emitting unit (21) becomes natural and brings about a sense of relaxation. [Explanation of symbols]

[0116] 10 Lighting equipment 11 Control section 21 Light emitting part 22 Light source 131 Conversion window (first section) 132 Conversion window (second section) 141,142 moving average L1 light intensity T1 1st Period T2 2nd Period La1,La2 average value L1x,L2x Maximum value of moving average Minimum value of L1n,L2n moving average S1, S2 integral value (total component intensity) f1 Upper limit frequency (first frequency) f2 Upper limit frequency (second frequency)

Claims

1. A light emitting unit including a light source; A control unit that controls the light emitting unit, a period during which the control unit dynamically changes the light intensity of the light output from the light-emitting unit includes a first period and a second period; an average value of the light intensity of the light-emitting unit in the second period is greater than an average value of the light intensity of the light-emitting unit in the first period; a maximum value of a moving average of the light intensity of the light-emitting unit in the second period is greater than a maximum value of a moving average of the light intensity of the light-emitting unit in the first period; Lighting fixtures.

2. A light emitting unit including a light source; A control unit that controls the light emitting unit, a period during which the control unit dynamically changes the light intensity of the light output from the light-emitting unit includes a first period and a second period; The light intensity of the light-emitting unit is such that a total of component intensities of light components having a frequency of 1 Hz or more in a second section including at least a part of the second period is greater than a total of component intensities of light components having a frequency of 1 Hz or more in a first section including at least a part of the first period, a maximum value of a moving average of the light intensity of the light-emitting unit in the second period is greater than a maximum value of a moving average of the light intensity of the light-emitting unit in the first period; Lighting fixtures.

3. an average value of the light intensity of the light-emitting unit in the second period is greater than an average value of the light intensity of the light-emitting unit in the first period; 3. A lighting device according to claim 2.

4. a minimum value of a moving average of the light intensity of the light-emitting unit in the second period is smaller than a maximum value of a moving average of the light intensity of the light-emitting unit in the first period; A lighting device according to any one of claims 1 to 3.

5. The duration of the second period is 40 seconds or less. A lighting device according to any one of claims 1 to 3.

6. The duration of the first period is 120 seconds or less. A lighting device according to any one of claims 1 to 3.

7. a first intensity ratio which is a ratio of a maximum value of a moving average of the light intensity of the light-emitting unit in the first period to a minimum value is greater than a second intensity ratio which is a ratio of a maximum value of a moving average of the light intensity of the light-emitting unit in the second period to a minimum value; A lighting device according to any one of claims 1 to 3.

8. a second frequency that is an upper limit frequency of the light intensity of the light-emitting unit in the second period is higher than a first frequency that is an upper limit frequency of the light intensity of the light-emitting unit in the first period; A lighting device according to any one of claims 1 to 3.

9. A control method for controlling a light-emitting unit including a light source, comprising: a period during which the light intensity of the light output from the light-emitting unit is dynamically changed by the control method includes a first period and a second period; an average value of the light intensity of the light-emitting unit in the second period is greater than an average value of the light intensity of the light-emitting unit in the first period; a maximum value of a moving average of the light intensity of the light-emitting unit in the second period is greater than a maximum value of a moving average of the light intensity of the light-emitting unit in the first period; Control methods.

10. A control method for controlling a light-emitting unit including a light source, comprising: a period during which the light intensity of the light output from the light-emitting unit is dynamically changed by the control method includes a first period and a second period; The light intensity of the light-emitting unit is such that a total of component intensities of light components having a frequency of 1 Hz or more in a second section including at least a part of the second period is greater than a total of component intensities of light components having a frequency of 1 Hz or more in a first section including at least a part of the first period, a maximum value of a moving average of the light intensity of the light-emitting unit in the second period is greater than a maximum value of a moving average of the light intensity of the light-emitting unit in the first period; Control methods.

11. an average value of the light intensity of the light-emitting unit in the second period is greater than an average value of the light intensity of the light-emitting unit in the first period; The control method according to claim 10.

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