Illumination unit

Abstract

To provide an illumination unit capable of preventing a second light emission control from being started during a first light emission control.SOLUTION: An illumination unit 20 includes: a first control unit 23 that outputs a piece of first instruction information at first timing and outputs a piece of second instruction information at second timing after the first timing; and a second control unit 26 that starts a first light emission control of a light source 22 at the first timing based on the output first instruction information and starts a second light emission control of the light source 22 at the second timing based on the output second instruction information. The length of the period from the first timing to the second timing is longer than the predetermined period in which the first light emission control is scheduled.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lighting device. [Background technology]

[0002] Patent Document 1 discloses a game device that displays game images on a television and can also add lighting effects using a lighting device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-222661 A Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides a lighting device that can prevent the second light-emitting control from being started in the middle of the first light-emitting control when a first control unit causes a second control unit to execute first light-emitting control and second light-emitting control in sequence. [Means for solving the problem]

[0005] A lighting device according to one aspect of the present invention includes a light source; a communication unit that receives a control request requesting that a dimming rate of the light source be changed in a predetermined pattern; a first control unit that outputs first instruction information at a first timing based on the received control request and outputs second instruction information at a second timing later than the first timing; and a second control unit that starts a first light emission control of the light source at the first timing based on the outputted first instruction information, and starts a second light emission control of the light source at the second timing based on the outputted second instruction information, wherein a length of a period from the first timing to the second timing is longer than a length of a predetermined period during which the first light emission control is scheduled. Effect of the Invention

[0006] The lighting device of the present invention can prevent the second light-emission control from being started in the middle of the first light-emission control. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a block diagram showing a functional configuration of a lighting system according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing an example of a change over time in the dimming rate of a light source in the interlocking control. [Diagram 3] FIG. 3 is a diagram illustrating an example of a sequence diagram of the interlocking control. [Figure 4] FIG. 4 is a diagram showing the dimming pattern 1. As shown in FIG. [Diagram 5] FIG. 5 is a diagram showing a change in dimming rate over time to explain light skipping. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, the embodiments will be described in detail with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component arrangement and connection forms, steps, and order of steps shown in the following embodiments are merely examples and are not intended to limit the present invention. In addition, among the components in the following embodiments, components that are not described in the independent claims will be described as optional components.

[0009] In addition, each drawing is a schematic diagram and is not necessarily a precise illustration. In each drawing, the same reference numerals are used for substantially the same configurations, and duplicated explanations may be omitted or simplified.

[0010] (Embodiment) [composition] First, the configuration of a lighting system according to an embodiment will be described. Fig. 1 is a block diagram showing the functional configuration of a lighting system according to an embodiment. As shown in Fig. 1, a lighting system 10 includes a lighting device 20, a wireless router 30, an information terminal 40, and a server 50.

[0011] The lighting device 20 is a so-called ceiling light that is installed on the ceiling of an indoor space such as a house to illuminate the indoor space. More specifically, the lighting device 20 is a ceiling light having a circular shape in a plan view. The lighting device 20 includes a wireless communication unit 21, a light source 22, a first control unit 23, a first storage unit 24, a speaker 25, a second control unit 26, and a second storage unit 27.

[0012] The wireless communication unit 21 is a communication circuit (communication module) for connecting the lighting device 20 to the wide area communication network 60 via the wireless router 30. The wireless communication unit 21 is a communication circuit that performs radio wave communication (short-distance wireless communication) in accordance with a communication standard such as Wi-Fi (registered trademark).

[0013] The light source 22 emits white light into the indoor space so that the lighting device 20 can illuminate the indoor space. The light source 22 is realized by, for example, an LED (Light Emitting Diode) element, but may be realized by other light emitting elements such as a semiconductor laser, an organic EL (Electro Luminescence), or an inorganic EL.

[0014] The first control unit 23 instructs the second control unit to control the light source 22 (outputs instruction information) based on a control request received by the wireless communication unit 21 from the information terminal 40, and plays the sound content stored in the first storage unit 24 using the speaker 25. The first control unit 23 corresponds to a higher-level control unit (master) of the second control unit 26 described below, and performs various controls, such as control related to the wireless communication unit 21, for operating the lighting device 20 according to specifications.

[0015] The first control unit 23 is realized by, for example, a microcomputer. The function of the first control unit 23 is realized by the microcomputer (hardware) constituting the first control unit 23 executing a computer program (software) stored in the first storage unit 24.

[0016] The first storage unit 24 is a storage device that stores a plurality of sound contents and a computer program executed by the first control unit 23. The first storage unit 24 is realized by, for example, a semiconductor memory. The first storage unit 24 may be built into the first control unit 23.

[0017] The speaker 25 is used to reproduce sound content and is, for example, a bass reflex speaker.

[0018] The second control unit 26 controls the brightness (dimming rate) of the light source 22 based on the instruction information output by the first control unit 23. The second control unit 26 is also capable of controlling the color temperature of the light emitted by the light source 22. The second control unit 26 corresponds to a lower control unit (slave) of the first control unit 23, and is a control unit specialized in controlling the light source 22.

[0019] The second control unit 26 is realized, for example, by a microcomputer separate (separate package) from the microcomputer corresponding to the first control unit 23. The function of the second control unit 26 is realized by the microcomputer (hardware) constituting the second control unit 26 executing a computer program (software) stored in the second storage unit 27.

[0020] The second storage unit 27 is a storage device that stores various information (such as a dimming pattern described below) necessary for controlling the light emission of the light source 22, a computer program executed by the second control unit 26, and the like. The second storage unit 27 is realized by, for example, a semiconductor memory. The second storage unit 27 may be built into the second control unit 26.

[0021] The wireless router 30 is a wireless communication device used for connecting the lighting devices 20 and the information terminal 40 to the wide area communication network 60. The wireless router 30 performs radio communication (short-range wireless communication) with the lighting devices 20 in accordance with a communication standard such as Wi-Fi (registered trademark).

[0022] The information terminal 40 is a smartphone, a tablet terminal, a personal computer, or the like, and functions as a remote controller for the lighting device 20 by installing a predetermined application program (hereinafter also simply referred to as a predetermined app). The information terminal 40 accepts a user's operation and transmits a control request to the lighting device 20 in response to the accepted operation.

[0023] The server 50 is a cloud server that relays a control request transmitted by the information terminal 40. The server 50 is located outside the indoor space in which the lighting device 20 is installed. When the information terminal 40 is located in the indoor space in which the lighting device 20 is installed, the control request is received by the lighting device 20 after passing through the wireless router 30, the wide area communication network 60, the server 50, the wide area communication network 60, and the wireless router 30 in this order.

[0024] The above-described transmission path of the control request is merely an example. For example, when the wireless communication unit 21 of the lighting device 20 and the information terminal 40 can directly communicate with each other in accordance with a communication standard such as BLE (Bluetooth Low Energy), the information terminal 40 may directly transmit the control request to the lighting device 20.

[0025] [Interlocking control] The lighting system 10 (lighting device 20) is capable of interlocking control for interlocking light effects (fluctuations) with sound. Specifically, the interlocking control is a control for changing the dimming rate of the light source 22 in a predetermined pattern and reproducing sound content using the speaker 25. Hereinafter, the interlocking control will be described with reference to Figs. 2 and 3. Fig. 2 is a diagram showing an example of a change over time in the dimming rate of the light source 22 in the interlocking control. Fig. 3 is a diagram showing an example of a sequence diagram of the interlocking control.

[0026] When a control request for interlocking control is received by the wireless communication unit 21, the first control unit 23 of the lighting device 20 acquires the received control request (S11). Based on the acquired control request, the first control unit 23 sequentially executes the controls of phases 1 to 4 as shown in FIG. 2 .

[0027] First, the first control unit 23 starts playing back the sound content 1 corresponding to the phase 1 at the first timing t1 (shown in FIG. 2) (S12). The first control unit 23 also outputs first instruction information to the second control unit 26 at the first timing t1. The first instruction information specifies an instruction to repeat the dimming pattern 1 seven times. FIG. 4 is a diagram showing the dimming pattern 1. In the dimming pattern 1, the dimming rate at the start point and the dimming rate at the end point are substantially the same, so that when the dimming pattern 1 is repeated, the dimming rate changes smoothly. Although not shown individually, the same applies to the dimming patterns 2 and 3 described below.

[0028] The second control unit 26 starts the light emission control of phase 1 at the first timing t1 based on the first instruction information acquired from the first control unit 23 (S13). Specifically, the second control unit 26 repeats dimming the light source 22 seven times according to the dimming pattern 1 pre-stored in the second storage unit 27, starting from the timing t1. More specifically, the dimming pattern 1 stored in the second storage unit 27 includes identification information of the dimming pattern (corresponding to 1 in the dimming pattern 1) and actual data of the dimming pattern (time-series data of the dimming rate). The same applies to dimming patterns 2 to 4 described below.

[0029] Thereafter, when the second timing t2 (shown in FIG. 2) arrives, the first control unit 23 starts playing back the sound content 2 corresponding to the phase 2 (S14). Furthermore, the first control unit 23 outputs second instruction information to the second control unit 26 at the second timing t2. The second instruction information specifies an instruction to repeat the dimming pattern 2 seven times.

[0030] The second control unit 26 starts the light emission control of phase 2 at the second timing t2 based on the second instruction information acquired from the first control unit 23 (S15). Specifically, the second control unit 26 repeats dimming the light source 22 according to the dimming pattern 2 pre-stored in the second storage unit 27 seven times, starting from the timing t2.

[0031] Thereafter, when the third timing t3 (shown in FIG. 2) arrives, the first control unit 23 starts playing back the sound content 3 corresponding to phase 3 (S16). Furthermore, the first control unit 23 outputs third instruction information to the second control unit 26 at the third timing t3. The third instruction information specifies an instruction to repeat the dimming pattern 3 five times.

[0032] The second control unit 26 starts the light emission control of phase 3 at the third timing t3 based on the third instruction information acquired from the first control unit 23 (S17). Specifically, the second control unit 26 repeats dimming of the light source 22 according to the dimming pattern 3 pre-stored in the second storage unit 27 five times, starting from the timing t3.

[0033] Thereafter, when the fourth timing t4 (shown in FIG. 2) arrives, the first control unit 23 starts playing back the sound content 4 corresponding to phase 4 (S18). Furthermore, the first control unit 23 outputs fourth instruction information to the second control unit 26 at the fourth timing t4. The fourth instruction information specifies an instruction to perform the dimming pattern 4 only once.

[0034] The second control unit 26 starts the light emission control of phase 4 at the third timing t4 based on the fourth instruction information acquired from the first control unit 23 (S19). Specifically, the second control unit 26 adjusts the light of the light source 22 according to the dimming pattern 4 stored in advance in the second storage unit 27, starting from the timing t4.

[0035] In this way, in the interlocking control, at the start timing of each of phases 1 to 4, the first control unit 23 starts playing the sound content corresponding to that phase, and instructs the second control unit 26 to perform light emission control corresponding to that phase (outputs instruction information). Upon receiving the instruction, the second control unit 26 immediately starts light emission control corresponding to that phase. This realizes interlocking control that interlocks the sound and light effects (fluctuations).

[0036] [Grace period] However, in the above configuration in which the first control unit 23 controls the playback of sound content and the second control unit 26 controls the light emission of the light source 22, there is a problem that the end timing of the playback control of the sound content and the end timing of the light emission control are not aligned because the first control unit 23 and the second control unit 26 each measure time independently.

[0037] For example, suppose that the second clock used by the second control unit 26 to measure time deviates from the first clock used by the first control unit 23 to measure time by a range of -1.5% to +1.5%. If it is assumed that the length of phase 1 (the length of the period during which sound content playback control and light emission control are scheduled) is three minutes, the playback of the sound content ends exactly when three minutes have elapsed, whereas the light emission control ends at a maximum of 2.7 seconds (=3 minutes×0.015) earlier than three minutes, or at a maximum of 2.7 seconds later than three minutes.

[0038] In this case, at the timing when three minutes have passed since the start of phase 1 (more specifically, at the timing when the first control unit 23 determines that three minutes have passed since the start of phase 1), the second control unit 26 may not have finished the light emission control of phase 1. If the first control unit 23 instructs the second control unit 26 to control the light emission of phase 2 at this timing, the second control unit 26 will start the light emission control of phase 2 in the middle of the light emission control of phase 1, and light skipping (sudden change in dimming rate) may occur. FIG. 5 is a diagram showing the change in the dimming rate over time to explain the light skipping. FIG. 5(a) shows the change in the dimming rate over time when phase 1 is ideally switched to phase 2, and FIG. 5(b) shows the change in the dimming rate over time when phase 2 starts in the middle of phase 1 and light skipping occurs (timing of vertical dashed line).

[0039] Therefore, in the lighting system 10, a grace period is provided between the end timing of phase 1 and the start timing (second timing t2) of phase 2 (see FIG. 2). When the length of phase 1 is 3 minutes and the clock error is ±1.5%, the grace period is set to a length of at least 2.7 seconds (i.e., 2.7 seconds or more). In other words, when the length of the phase immediately preceding the grace period is L and the clock error is ±n%, the length of the grace period only needs to be L×n% or more. When the length of the grace period is set to exactly L×n%, the longer the length of the phase immediately preceding the grace period, the longer the grace period is set to.

[0040] As shown in FIG. 2, grace periods are also provided between the end timing of phase 2 and the start timing of phase 3 (third timing t3), and between the end timing of phase 3 and the start timing of phase 4 (fourth timing t4).

[0041] In this way, in the interlocking control, the second timing t2 at which phase 2 starts is a timing after the predetermined period during which phase 1 is scheduled plus the grace period has elapsed, starting from the first timing t1. In other words, the length of the period from the first timing t1 to the second timing t2 is the sum of the length of the predetermined period during which phase 1 is scheduled and the length of the grace period. This allows the lighting system 10 to suppress the occurrence of light skipping. In other words, the lighting system 10 can suppress the user from feeling uncomfortable.

[0042] After the light emission control of the current phase is completed, the second control unit 26 causes the light source 22 to emit light at the dimming lower limit value in the dimming pattern used in the current phase until the start timing of the next phase arrives. For example, after the light emission control of phase 1 is completed, the second control unit 26 causes the light source 22 to emit light at 5%, which is the dimming lower limit value in dimming pattern 1, until the second timing t2 arrives. Since the dimming rate at the start point of dimming pattern 2 is set to 5%, which is the dimming lower limit value, the dimming rate is maintained at 5% after the end of phase 1, thereby suppressing the occurrence of light skipping at the start timing of phase 2 (second timing t2).

[0043] [Variations] In the above-described interlocking control, the dimming rate of the light source 22 is controlled, but the color temperature may be controlled in addition to the dimming rate. For example, in phases 1 to 3, the color temperature of the light emitted by the light source 22 may be controlled to 2700 K, and in phase 4, the color temperature may be gradually changed from 2700 K to 5500 K as the dimming rate increases.

[0044] Also, in the above-described interlocking control, the instruction information output from the first control unit 23 to the second control unit 26 is described as identification information of a dimming pattern used in the light emission control of the light source 22 and information instructing the number of times the dimming pattern is to be repeated. However, the instruction information may be information instructing the dimming rate of the light source 22 during the light emission control in association with time, such as continuing a dimming rate of 10% for one minute, and then continuing a dimming rate of 20% for one minute. The specific form of the instruction information is not particularly limited.

[0045] Moreover, it is not essential that the first control unit 23 performs control to play back sound content using the speaker 25 (sound output control) in parallel with the light emission control by the second control unit 26. The above-mentioned technique of providing a grace period is useful in a lighting device 20 that employs a circuit configuration in which the upper first control unit 23 instructs the lower second control unit 26 to control light emission. The technique of providing a grace period can also be applied to a lighting device that has this circuit configuration but does not have a sound content playback function.

[0046] The length of the grace period is set in advance by a designer of the lighting device 20 or the like and stored in the first storage unit 24 as a part of an algorithm for executing the interlocking control, but may be calculated each time by the first control unit 23. For example, after the end of phase 1, the first control unit 23 may calculate the grace period based on a calculation formula of phase 1 length × n%, and start control of phase 2 after the calculated grace period has elapsed.

[0047] In addition, when setting the length of the grace period, a first time from when the second control unit 26 acquires the instruction information until the light source 22 is dimmed based on the instruction information, and a second time required to resend the instruction information when communication of the instruction information fails may be taken into consideration. However, according to the inventors' study, the first time is 20 ms or less, and the second time is a maximum of about 30 ms, and both the first time and the second time are sufficiently small compared to the time lag caused by the clock error, so it is considered that they do not need to be taken into consideration.

[0048] [Effects, etc.] Hereinafter, examples of inventions that can be obtained from the disclosure of this specification will be given, and the effects and the like that can be obtained from the exemplified inventions will be described.

[0049] Invention 1 is a lighting device 20 including a light source 22, a wireless communication unit 21 that receives a control request requesting that the dimming rate of the light source 22 be changed in a predetermined pattern, a first control unit 23 that outputs first instruction information at a first timing t1 based on the received control request and outputs second instruction information at a second timing t2 that is later than the first timing t1, and a second control unit 26 that starts a first light emission control of the light source 22 at the first timing t1 based on the output first instruction information and starts a second light emission control of the light source 22 at the second timing t2 based on the output second instruction information, the length of the period from the first timing t1 to the second timing t2 being longer than the length of the predetermined period during which the first light emission control is scheduled. In the above embodiment, the length of the predetermined period during which the first light emission control is scheduled is the length of phase 1.

[0050] In such an illumination device 20, the length of the period from the first timing t1 to the second timing t2 is set to be longer than the length of the predetermined period during which the first light emission control is scheduled, and therefore it is possible to prevent the second light emission control from being started in the middle of the first light emission control.

[0051] Invention 2 is the lighting device 20 of Invention 1, further comprising a speaker 25, and the first control unit 23 further performs sound output control to output sound from the speaker 25 for a predetermined period from the first timing t1 based on the received control request.

[0052] Such lighting device 20 can perform, in parallel, sound output from speaker 25 and the first light emission control of light source 22. In other words, sound output from speaker 25 and the first light emission control of light source 22 can be linked.

[0053] Invention 3 is the lighting device 20 of Invention 1 or 2, in which the second control unit 26 causes the light source 22 to emit light at a predetermined dimming rate after the first light emission control is completed and until the second timing t2 arrives.

[0054] Such lighting device 20 can prevent the dimming rate from suddenly changing at the second timing t2 by matching the predetermined dimming rate to the dimming rate at the second timing t2 (the dimming rate at the start timing of the second light-emission control).

[0055] Invention 4 is the lighting device 20 of any of Inventions 1 to 3, wherein the length of the period from the first timing t1 to the second timing t2 is the length of the predetermined period plus the length of the grace period, and the grace period is set to a longer period as the length of the predetermined period is longer.

[0056] In such an illumination device 20, the longer the predetermined period, the longer the grace period is provided, so that it is possible to prevent the second light-emission control from being started in the middle of the first light-emission control.

[0057] Invention 5 is the lighting device 20 of any of Inventions 1 to 4, in which the length of the period from the first timing t1 to the second timing t2 is the length of the predetermined period plus the length of the grace period, and when the second clock used by the second control unit 26 deviates from the first clock used by the first control unit 23 in a range of -n% or more and +n% or less, the grace period is set to a length of at least n% times the length of the predetermined period.

[0058] Such lighting device 20 is provided with a grace period longer than the amount of delay that may occur due to a clock error, and thus can prevent the second light-emission control from being started in the middle of the first light-emission control.

[0059] Invention 6 is the lighting device 20 of any of Inventions 1 to 5, further comprising a second storage unit 27 in which a plurality of dimming patterns are stored in association with identification information of the dimming patterns, the first instruction information being identification information of a dimming pattern used in the first light emission control and information instructing the number of times the dimming pattern is to be repeated, and the second instruction information being identification information of a dimming pattern used in the second light emission control and information instructing the number of times the dimming pattern is to be repeated.

[0060] Such a lighting device 20 can reduce the amount of communication between the first control unit 23 and the second control unit 26, compared to a configuration in which time-series data of the dimming rate is instructed from the first control unit 23 to the second control unit 26.

[0061] Invention 7 is the lighting device 20 of any of Inventions 1 to 5, wherein the first instruction information is information instructing a dimming rate of the light source 22 during the first light-emission control in association with time, and the second instruction information is information instructing a dimming rate of the light source 22 during the second light-emission control in association with time.

[0062] Such a lighting device 20 can achieve a wider variety of changes in dimming rate compared to a configuration in which a combination of predefined dimming patterns is used.

[0063] (Other embodiments) Although the embodiment has been described above, the present invention is not limited to the above embodiment.

[0064] For example, the aspect of the lighting device described in the above embodiment is merely an example, and the aspect of the lighting device is not particularly limited. The lighting device may be a base light, a downlight, a spotlight, or the like. In addition, the lighting device may not include a speaker.

[0065] In the above embodiment, the processes executed by a specific processing unit may be executed by another processing unit. The order of multiple processes may be changed, or multiple processes may be executed in parallel.

[0066] In the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory.

[0067] Furthermore, each component may be realized by hardware. For example, each component may be a circuit (or an integrated circuit). These circuits may form a single circuit as a whole, or each may be a separate circuit. Furthermore, each of these circuits may be a general-purpose circuit, or a dedicated circuit.

[0068] Furthermore, the general or specific aspects of the present invention may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

[0069] For example, the present invention may be realized as the lighting system or lighting device of the above-mentioned embodiment. Also, the present invention may be realized as a method executed by a lighting device, a program for causing a lighting device to execute the method, or a non-transitory computer-readable recording medium having such a program recorded thereon. Such a program includes an upgrade program for causing an existing lighting device to operate in the same manner as the lighting device of the above-mentioned embodiment.

[0070] In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art may think of, or forms realized by arbitrarily combining the components and functions of each embodiment within the scope that does not deviate from the spirit of the present invention. [Explanation of symbols]

[0071] 10. Lighting System 20 Lighting Equipment 21 Wireless Communication Department 22 Light source 23 First Control Section 24 1st memory section 25 Speakers 26 Second Control Section 27 2nd memory section 30 Wireless Router 40 Information terminal 50 Servers 60 Wide Area Communication Network

Claims

1. A light source; a communication unit that receives a control request for changing the dimming rate of the light source in a predetermined pattern; a first control unit that outputs first instruction information at a first timing based on the received control request, and outputs second instruction information at a second timing that is later than the first timing; a second control unit that starts a first light emission control of the light source at the first timing based on the outputted first instruction information, and starts a second light emission control of the light source at the second timing based on the outputted second instruction information, The length of the period from the first timing to the second timing is longer than the length of a predetermined period during which the first light emission control is scheduled. Lighting equipment.

2. In addition, it is equipped with a speaker, The first control unit further performs sound output control for outputting sound from the speaker for the predetermined period from the first timing based on the received control request.

10. The lighting device of claim 1.

3. The second control unit controls the light source to emit light at a predetermined dimming rate until the second timing arrives after the first light emission control is completed.

3. The lighting device according to claim 1 or 2.

4. a length of the period from the first timing to the second timing is a length obtained by adding a length of a grace period to a length of the predetermined period, The longer the length of the predetermined period, the longer the grace period is set.

3. The lighting device according to claim 1 or 2.

5. a length of the period from the first timing to the second timing is a length obtained by adding a length of a grace period to a length of the predetermined period, When the second clock used by the second control unit deviates from the first clock used by the first control unit by a range of -n% to +n%, the grace period is set to a length equal to or greater than the length of the predetermined period x n%.

3. The lighting device according to claim 1 or 2.

6. Further, a storage unit is provided in which a plurality of dimming patterns are stored in association with identification information of the dimming patterns, the first instruction information is identification information of a dimming pattern used in the first light emission control and information instructing a number of times the dimming pattern is to be repeated, The second instruction information is identification information of a dimming pattern used in the second light emission control and information instructing the number of times the dimming pattern is to be repeated.

3. The lighting device according to claim 1 or 2.

7. the first instruction information is information instructing a dimming rate of the light source during the first light emission control in association with time, The second instruction information is information that indicates a dimming rate of the light source during the second light emission control in association with time.

3. The lighting device according to claim 1 or 2.

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