Lighting control system

Abstract

To provide a lighting control system capable of achieving both of an energy saving effect and a secure of brightness required in a space.SOLUTION: A lighting control system 1 comprises a control part 14 that can set at least two or more scenes of a first scene and a second scene. Also, a space contains a first area to which the first scene is adopted, and a second area to which the second scene is adopted. The control part 14 controls at least one of a whole illumination fixture 11 and a local illumination fixture 12 so that an illumination degree of a desk surface provided to the first area to which the first scene is adopted as compared with the second scene becomes high, and controls at least one of the whole illumination fixture 11 and a local illumination fixture 12 so that an area of the first area and an area of the second area are changed in accordance with the number of persons stayed in the space. The area of the first area occupies one or more segment regulated by an aggregation of a plurality of desks or 10% of all of the space.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a lighting control system. [Background technology]

[0002] Patent document 1 discloses a lighting system including a hand-held lighting device installed at a height of 1.5 m or more and less than 2.0 m from the floor of a room, a spatial lighting device installed above the hand-held lighting device and emitting light toward the ceiling of the room, and a control device capable of controlling the operation of the hand-held lighting device and the spatial lighting device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-56016 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the lighting system of Patent Document 1, although energy saving effects can be achieved by turning on the handheld lighting device at low illuminance, this reduces the sense of brightness of the entire space, which can cause discomfort to people in the space.

[0005] Therefore, an object of the present disclosure is to provide a lighting control system that can achieve both an energy saving effect and ensuring the necessary brightness in a space. [Means for solving the problem]

[0006] One aspect of the lighting control system according to the present disclosure includes a control unit capable of setting at least two or more of a first scene and a second scene in a space where at least one of general lighting fixtures and local lighting fixtures is used, the space including a first area to which the first scene is applied and a second area different from the first area to which the second scene is applied, the control unit controls at least one of the general lighting fixtures and the local lighting fixtures so that the illuminance of a desk surface located in the first area to which the first scene is applied is higher than that of the second scene, and controls at least one of the general lighting fixtures and the local lighting fixtures so as to change the area of ​​the first area and the area of ​​the second area according to the number of people staying in the space, the area of ​​the first area occupies one or more sections defined by a collection of a plurality of desks or 10% or more of the entire space. Effect of the Invention

[0007] According to the present disclosure, it is possible to achieve both an energy saving effect and ensuring the necessary brightness in a space. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram showing a lighting control system according to an embodiment. [Diagram 2] FIG. 2 is a diagram showing a first area in a space to which a first scene is applied, and a second area that is different from the first area and to which a second scene is applied. [Diagram 3] FIG. 3 is a diagram showing a display unit of the lighting control system according to the embodiment. [Figure 4] FIG. 4 shows the relationship between subjects' discomfort and the Feu value. [Diagram 5] FIG. 5 shows the relationship between subjects' feeling of gloom and the Feu value. [Figure 6]FIG. 6 shows the results of evaluating the distinguishability between the first and second areas when the entire office space is illuminated with base lighting, and the distinguishability between the first and second areas when the office space is illuminated with the TAL (Task and Ambient Lighting) method. [Figure 7] FIG. 7 is a flowchart showing the processing operation of the lighting control system in the embodiment. [Figure 8] FIG. 8 is a flowchart showing a processing operation in a case where the first area and the second area are changed depending on the number of people existing in a space. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present disclosure will be described. Note that each of the embodiments described below shows a specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, arrangement and connection forms of the components, steps, order of steps, and the like shown in the following embodiments are merely examples and are not intended to limit the present disclosure. Therefore, among the components in the following embodiments, components that are not described in the independent claims will be described as optional components.

[0010] 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.

[0011] (Embodiment) <Configuration and Function> First, the configuration of a lighting control system 1 according to the first embodiment will be described with reference to FIGS. 1 to 3. FIG.

[0012] FIG. 1 is a block diagram showing a lighting control system 1 in an embodiment. FIG. 2 is a diagram showing a first area in a space to which a first scene is applied, and a second area different from the first area to which a second scene is applied. FIG. 2(a) shows an example in which there are few workers in the space, and FIG. 2(b) shows an example in which the number of workers in the space increases and the first area in which the first scene is to be created is expanded. In FIG. 2, general lighting fixtures 11 and local lighting fixtures 12 are omitted. FIG. 3 is a diagram showing a display unit 15 of the lighting control system 1 in an embodiment.

[0013] As shown in Figs. 1 and 2, a lighting control system 1 controls each lighting device 10 provided in a space in a room in which, for example, an office in an office building or the like is located. For example, six sections are set in the space. In each section, desks and chairs (seats) for, for example, 10 people are prepared. One section may be physically separated by a partition or the like, or may simply be set as a collection of multiple desks as shown in Fig. 1. In this space, an employee can select a desired seat after coming to work, sit down freely, and work. Note that the number of sections and the number of desks and chairs are merely examples and are not limited to the present embodiment.

[0014] The lighting control system 1 includes a plurality of lighting devices 10, an acquisition unit 13, a control unit 14, and a display unit 15.

[0015] The lighting devices 10 are composed of a plurality of general lighting fixtures 11 and a plurality of local lighting fixtures 12. The lighting device 10 is a collective term for the general lighting fixtures 11 and the local lighting fixtures 12.

[0016] Each of the general lighting fixtures 11 is a lighting fixture capable of emitting light toward the entire space. Each of the general lighting fixtures 11 is, for example, a ceiling light, a base light, a ceiling light, or the like that is installed on the ceiling and can illuminate the entire space.

[0017] Each of the general lighting fixtures 11 has a dimming function and a color adjustment function. When each of the general lighting fixtures 11 receives a control signal from the control unit 14, it turns on in a lighting mode corresponding to the control signal. For example, each of the general lighting fixtures 11 can adjust the brightness of the emitted light to multiple levels as a dimming function, thereby making the brightness of the emitted light darker or brighter. Also, each of the general lighting fixtures 11 can emit white light with a color temperature ranging from a low color temperature such as incandescent light to a high color temperature such as warm white, neutral white, or daylight light as a color adjustment function.

[0018] Each of the local lighting fixtures 12 is a lighting fixture capable of emitting light toward a part of a space. The local lighting fixtures 12 are, for example, a spotlight, a pendant light, a downlight, or the like.

[0019] Each of the local lighting fixtures 12 has a dimming function and a color adjustment function. When each of the local lighting fixtures 12 receives a control signal from the control unit 14, it turns on in a lighting mode corresponding to the control signal. For example, each of the local lighting fixtures 12 can adjust the brightness of the emitted light to multiple levels as a dimming function, thereby making the brightness of the emitted light darker or brighter. Also, each of the local lighting fixtures 12 can emit white light with a color temperature ranging from a low color temperature such as incandescent light to a high color temperature such as warm white, daylight white, or daylight light as a color adjustment function.

[0020] Each of the local lighting fixtures 12 is installed on the ceiling so as to correspond to, for example, a plurality of desks provided in each of the plurality of sections. One local lighting fixture 12 can illuminate the desk surface of one desk. Also, one local lighting fixture 12 may be capable of illuminating a plurality of desks, that is, the desk surface of one desk and the desk surfaces of surrounding desks adjacent to the one desk. The local lighting fixtures 12 may directly or indirectly illuminate the walls and ceiling of a room that constitutes a space. This allows the desk surface illuminance of each of the plurality of desks to be changed.

[0021] The acquisition unit 13 can acquire information indicating the number of people present in a space.

[0022] Specifically, in a case where a time-stamp system installed in an office can grasp the number of people present in a space by calculating the number of people who have come to work and the number of people who have left work, the acquisition unit 13 may acquire information indicating the number of people present in the space from the time-stamp system. In addition, in a case where a schedule management system equipped with an application tool capable of managing the daily schedule of workers working in the office is installed in the office, the acquisition unit 13 may acquire information indicating the number of people present in the space from the schedule management system. In addition, in a case where a sensor installed in the office can detect the number of people present in the space and / or the positions of the people, the acquisition unit 13 may acquire information indicating the number of people present in the space and / or the positions of the people from the sensor. The sensor is an infrared sensor, a human sensor, a camera sensor, or the like. In addition, in a case where an occupancy detection sensor is installed in the office, the acquisition unit 13 may acquire information indicating the number of people present in the space and information indicating the positions of the seats (positions of the people) from the occupancy detection sensor. In addition, a communication device installed in the office may emit a beacon signal, and a terminal device used by a worker may receive the beacon signal, and the terminal device may transmit a signal indicating the reception of the beacon signal to the communication device. In this way, the communication device counts the number of times a signal indicating reception of a beacon signal is received, and the acquisition unit 13 may acquire information indicating the number of people present in the space from the communication device. The acquisition unit 13 may be a time attendance system, a schedule management system, a sensor, or a terminal device.

[0023] The control unit 14 can control the multiple general lighting fixtures 11 individually or collectively, and can also control the multiple local lighting fixtures 12 individually or collectively. That is, the control unit 14 outputs a control signal for turning on the corresponding one or more general lighting fixtures 11 and one or more local lighting fixtures 12 among the multiple lighting devices 10 to each of the corresponding one or more general lighting fixtures 11 and one or more local lighting fixtures 12. As a result, the corresponding one or more general lighting fixtures 11 and one or more local lighting fixtures 12 are turned on in response to the control signal. That is, the control unit 14 controls the one or more general lighting fixtures 11 and one or more local lighting fixtures 12 to perform a predetermined illumination indicated by the control signal.

[0024] The control unit 14 can set at least two or more scenes, a first scene and a second scene, in the space using at least one of the general lighting fixtures 11 and the local lighting fixtures 12. For example, as shown in (a) and (b) of Fig. 2, some of a plurality of sections provided in the space are illuminated by the first scene so as to become a first area, and the remaining sections are illuminated by the second scene so as to become a second area.

[0025] Specifically, the space shown in (a) and (b) of Figures 2 includes a first area to which a first scene is applied, and a second area that is different from the first area to which a second scene is applied.

[0026] The first area is an area in a space where the illuminance of the desk surface is higher than that of the surrounding area, i.e., the second area. The first area is, for example, an area including a section in front of a desk among a plurality of sections. The area of ​​the first area may be 10% or more of one section defined by a set of a plurality of desks, or the entire space. This is because, if the seats and desks that do not fill one section, or the first area, are less than 10% of the entire space, the workers may not feel the brightness easily, and it is difficult to obtain the effect of guiding the workers. However, if one section or the first area is 10% or more of the entire space, it is easy for the workers to recognize it, and it is expected to obtain a certain guiding effect.

[0027] The control unit 14 also controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 so that the illuminance of the desk surface provided in the first area to which the first scene is applied is higher than that of the second scene. Specifically, the control unit 14 controls the general lighting fixtures 11 and the local lighting fixtures 12 so that the illuminance of the desk surface provided in the first area to which the first scene is applied is higher than the ambient illuminance of the surroundings other than the desk surface. Preferably, the control unit 14 may control at least one of the general lighting fixtures 11 and the local lighting fixtures 12 so that the illuminance of the desk surface provided in the first area to which the first scene is applied is at least twice as high as the illuminance of the desk surface provided in the second area to which the second scene is applied.

[0028] For example, the control unit 14 may form a first area to which a first scene is applied by controlling a plurality of general lighting fixtures 11 and one or more local lighting fixtures 12, or by controlling only one or more local lighting fixtures 12. The control unit 14 may also form a second area to which a second scene is applied by controlling a plurality of general lighting fixtures 11 or a plurality of local lighting fixtures 12.

[0029] For example, when the illuminance of the desk surface in the first area is to be higher than that in the second area, the control unit 14 may lower the output of the multiple general lighting devices 11 below a reference value and may raise the output of one or more local lighting devices 12 capable of illuminating the desk surface in the first area above a reference value. The control unit 14 may raise the illuminance of the desk surface in the first area above that in the second area by raising only the output of one or more local lighting devices 12 capable of illuminating the desk surface in the first area above a reference value. The control unit 14 may raise the illuminance of the desk surface in the first area above that in the second area by lowering only the output of the multiple general lighting devices 11 below a reference value. The same applies to the case where the illuminance of the desk surface in the first area is to be higher than the ambient illuminance of the surroundings other than the desk surface.

[0030] For example, the illuminance of the desk surface in the first area, which is an area recommended for work, is preferably 300 (lx) or more, and more preferably 500 (lx) or more. In this case, energy saving effects can be obtained by setting the illuminance of the second area, which is an area not recommended for work, to less than 300 (lx). Furthermore, even greater energy saving effects can be expected by lowering the illuminance of the second area to about 150 (lx).

[0031] Furthermore, the control unit 14 may control at least one of the general lighting devices 11 and the local lighting devices 12 so that the Feu value is 5 or more when the area of ​​the first area to which the first scene is applied is the smallest. This is because if the Feu value in the first area is less than 5, the worker may feel uncomfortable or depressed by the brightness of the first area. However, if the Feu value in the first area is 5 or more, the worker is expected to suppress the discomfort and depression caused by the brightness of the first area. The case where the area of ​​the first area to which the first scene is applied is the smallest is, for example, one section or an area that is 10% of the space.

[0032] Here, the Feu value is a quantification of the brightness of a space that humans feel, that is, a quantification of the impression that the human eye makes when looking at a space. For example, the brightness of a space was compared between a case where four lighting fixtures were placed along the four walls of a rectangular parallelepiped "Space A" and a case where five lighting fixtures were placed in the center of a rectangular parallelepiped "Space B". In "Space A", the four lighting fixtures can illuminate the four walls and the floor, so the space appears bright overall, and the average floor illuminance of "Space A" was 290lx. In "Space A", the five lighting fixtures can mainly illuminate the floor, so the floor appears bright, and the average floor illuminance of "Space B" was 420lx. If the average floor illuminance is used as the standard, "Space B" is brighter. However, if the Feu value is used, the Feu value of "Space A" is 12.5, and the Feu value of "Space B" is 9.5. Therefore, the average floor illuminance is different from the brightness of the space that humans actually feel. Therefore, in this embodiment, attention is focused on the sense of spatial brightness felt by humans, and at least one of the general lighting fixtures 11 and the local lighting fixtures 12 may be controlled so that the Feu value is 5 or more.

[0033] The second area is an area where the illuminance of the desk surface is lower than that of the first area. For example, the second area is an area including the remaining sections where no person is present among the multiple sections in (a) and (b) of FIG. 2.

[0034] For example, when a worker comes to work in an office, the control unit 14 controls one or more general lighting devices 11 and one or more local lighting devices 12 to form a first area in the office space where a first scene is applied and a second area in which a second scene is applied. In this case, since the worker would prefer to work in the bright first area rather than the dark second area, it is considered that the worker will work at one of the desks in the first area. In this way, by increasing the illuminance of the desk surface in the first area compared to the second area, it is expected that the worker can be guided to work at a desk in the first area.

[0035] Furthermore, the control unit 14 can acquire information indicating the number of people present in the space via the acquisition unit 13. The control unit 14 controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 to change the area of ​​the first area and the area of ​​the second area based on the acquired information indicating the number of people present in the space. Specifically, when the number of people present in the space reaches or exceeds a predetermined number, the control unit 14 controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 to change the area of ​​the first area and the area of ​​the second area according to the number of people staying in the space.

[0036] For example, in Fig. 2(a), a person is present at a desk in one section, but as shown in Fig. 2(b), when the number of people in the space increases and reaches or exceeds a first threshold, the control unit 14 sets any one of the sections as a first area. In other words, the control unit 14 controls the general lighting devices 11 and the local lighting devices 12 to expand the first area in the space and reduce the second area. The expanding first area, i.e., the reducing second area, is set in advance by a predetermined algorithm.

[0037] Furthermore, when the number of people present in the space reaches or exceeds a second threshold value that is greater than the first threshold value, the control unit 14 controls at least one of the general lighting devices 11 and the local lighting devices 12 to further expand the area of ​​the first area and further reduce the area of ​​the second area in accordance with the number of people present in the space. For example, the control unit 14 sets any one of the sections as the first area, and controls the general lighting devices 11 and the local lighting devices 12 to expand the first area in the space and reduce the second area.

[0038] The same applies when the number of people in the space increases. In this way, in the lighting control system 1, a plurality of thresholds may be set in stages. Also, the plurality of thresholds may be appropriately changed according to the request of the owner.

[0039] Furthermore, when the number of people in the space falls below a predetermined number and there is a section in the first area where no one is present, the control unit 14 sets the section in which no one is present as the second area. In other words, the control unit 14 controls the general lighting devices 11 and the local lighting devices 12 to expand the second area in the space and reduce the first area.

[0040] Furthermore, the control unit 14 controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 to reduce the output of light illuminating a second area other than the first area to which the first scene is applied, each time the area of ​​the first scene increases. For example, when the general lighting fixtures 11 and the local lighting fixtures 12 are turned on in the first area, only the general lighting fixture 11 may be turned on in the second area, or the output of the general lighting fixtures 11 and the local lighting fixtures 12 may be reduced compared to the first area.

[0041] The display unit 15 is a display medium such as a liquid crystal display or an organic electroluminescence display. As shown in FIG. 3, the display unit 15 displays information about the space for the set scene. The information about the space is at least one of the brightness of the space, the energy saving rate, the power consumption, and the amount of CO2 emissions. For example, the display unit 15 displays the brightness of the space (illuminance, Feu value, etc.) in a first area in which a first scene is set, and displays the brightness of the space (illuminance, Feu value, etc.) in a second area in which a second scene is set. Furthermore, the display unit 15 displays the energy saving rate, the power consumption, and the amount of CO2 emissions of the lighting device 10 in the current space.

[0042] Such a display unit 15 is installed, for example, on a wall or a pillar of an office. This allows a worker present in the space to visually recognize the brightness and energy saving rate of the space displayed on the display unit 15.

[0043] <Experimental Results> First, the reason why the Feu value is set to 5 or more when the area of ​​the first area to which the first scene is applied is the smallest will be described with reference to FIGS.

[0044] Fig. 4 is a graph showing the relationship between subjects' discomfort and Feu values. Fig. 5 is a graph showing the relationship between subjects' depression and Feu values.

[0045] In the experiment, several dozen subjects were asked to evaluate the impressions of the office space when 22 scenes were performed in the office space using base lighting fixtures, spot lighting fixtures, and wall lighting fixtures installed in a 10 (m) x 5 (m) office space. The several dozen subjects rated the impressions of the office space on a seven-point scale from -3 to +3. Figures 4 and 5 show the average impression evaluations of several dozen subjects for each of the 22 scenes.

[0046] In Figure 4, the impression rating of 0 is used as the standard, with a rating below 0 indicating that the subject felt uncomfortable, and a rating above 0 indicating that the subject felt comfortable. Also, in Figure 5, the impression rating of 0 is used as the standard, with a rating below 0 indicating that the subject felt gloomy, and a rating above 0 indicating that the subject felt cheerful.

[0047] As shown by the dashed lines in Figures 4 and 5, it was found that the subject's discomfort and gloomy feelings were alleviated when the Feu value was 5 or more. More preferably, it was found that the subject's discomfort and gloomy feelings were alleviated when the Feu value was 6 or more.

[0048] Next, the reason why the first area to which the first scene is applied has a stronger induction effect than the second area to which the second scene is applied will be described with reference to FIG.

[0049] FIG. 6 shows the results of evaluating the distinguishability between the first and second areas when the entire office space is illuminated with base lighting, and the distinguishability between the first and second areas when the office space is illuminated with the TAL method.

[0050] In the experiment, using base lighting fixtures, spot lighting fixtures, and wall lighting fixtures installed in an office space of 10 (m) x 10 (m), several dozen subjects were asked to evaluate (1) the distinguishability between the first area and the second area when the entire office space was base-illuminated as in the conventional technology, and (2) the distinguishability between the first area and the second area when the office space was illuminated using the lighting control system 1 of the present embodiment. The several dozen subjects rated the distinguishability on a five-point scale from -2 to +2. FIG. 6 shows the average impression evaluations of several dozen subjects for each of the first and second scenes.

[0051] In Figure 6, on a five-point scale ranging from -2 to +2, 0 is used as the base value, and values ​​less than 0 indicate that the subject answered that it was "slightly difficult to understand" or "difficult to understand," while values ​​greater than 0 indicate that the subject answered that it was "slightly easy to understand" or "easy to understand."

[0052] In Figure 6, the average evaluation of subjects who answered "somewhat easy to understand" or "easy to understand" was 0.16 in the case of (1) above, but 0.65 in the case of (2) above. In addition, the percentage of subjects who answered "somewhat difficult to understand" or "difficult to understand" was 35.48% in the case of (1) above, but 17.65% in the case of (2) above.

[0053] For this reason, it can be said that the subjects were more able to discriminate in case (2) than in case (1), and therefore that the first area to which the first scene is applied has a greater induction effect than the second area to which the second scene is applied.

[0054] <Processing Operation> Next, the processing operation of the lighting control system 1 according to the present embodiment will be described with reference to FIG.

[0055] FIG. 7 is a flowchart showing the processing operation of the lighting control system 1 in the embodiment.

[0056] In FIG. 7, it is assumed that a plurality of workers who perform work in an office space start to report to the office.

[0057] First, the acquisition unit 13 acquires information indicating a worker who has entered a space (S11). For example, the acquisition unit 13 acquires information indicating the worker by detecting the first worker who arrives at the office using a time clock system, a sensor, or a communication device installed in the office. The acquisition unit 13 transmits the acquired information indicating the worker to the control unit 14.

[0058] Next, the control unit 14 forms a first area to which the first scene is applied and a second area to which the second scene is applied to any one of the multiple sections in the space (S12). At this time, the control unit 14 controls the multiple general lighting fixtures 11 and the multiple local lighting fixtures 12 so that the illuminance of the desk surface provided in the first area to which the first scene is applied is higher than that of the second scene. The control unit 14 may control the multiple general lighting fixtures 11 and the multiple local lighting fixtures 12 so that the illuminance of the desk surface provided in the first area is at least twice as high as the illuminance of the desk surface provided in the second area. The control unit 14 may also control the multiple general lighting fixtures 11 and the multiple local lighting fixtures 12 so that the Feu value is 5 or more when the area of ​​the first area is the smallest. Then, the lighting control system 1 ends the processing operation of FIG. 7.

[0059] Next, the processing operation in the case where the number of people existing in the space increases after the process in Fig. 7 is finished will be described with reference to Fig. 8. Fig. 8 is a flowchart showing the processing operation in the case where the first area and the second area are changed according to the number of people existing in the space.

[0060] First, the acquisition unit 13 acquires information indicating the number of people present in a space from a time attendance system, a schedule management system, a sensor (including devices owned by each worker such as a smart phone or a wireless tag, and devices installed in building interior materials and fixtures), or a communication device (S21). The acquisition unit 13 transmits the acquired information indicating the number of people present in the space to the control unit 14.

[0061] Next, the control unit 14 determines whether or not the number of people existing in the space is equal to or greater than a threshold value, based on the information indicating the number of people existing in the space (S22).

[0062] When the control unit 14 determines, based on the information indicating the number of people present in the space, that the number of people present in the space is less than the threshold value (NO in S22), the processing operation returns to step S21.

[0063] On the other hand, when the control unit 14 determines that the number of people present in the space is equal to or greater than the threshold based on the information indicating the number of people present in the space (YES in S22), it controls at least one of the general lighting devices 11 and the local lighting devices 12 to enlarge the area of ​​the first area and reduce the area of ​​the second area (S23). For example, the control unit 14 controls the general lighting devices 11 and the local lighting devices 12 to enlarge the first area in the space and reduce the second area. Then, the lighting control system 1 ends the flowchart and repeats the processing operation of FIG. 8.

[0064] Here, since the number of workers in the office space increases every time a worker comes to work, multiple thresholds may be set, such as "first threshold<second threshold<...." In this case, the control unit 14 performs the process of step S22 in ascending order of thresholds based on information indicating the number of people present in the space, and can control at least one of the multiple general lighting devices 11 and the multiple local lighting devices 12 to gradually increase the area of ​​the first area and gradually decrease the area of ​​the second area when the answer to step S22 is YES.

[0065] In addition, when workers leave work, the number of people in the office space gradually decreases, so when the number of people present in the space falls below a predetermined number and there is a section within the first area where no one is present, the control unit 14 controls the multiple general lighting fixtures 11 and multiple local lighting fixtures 12 to reduce the first area in the space and expand the second area.

[0066] In this way, by simultaneously changing the first area and the second area depending on the number of people present in the space, it is possible to illuminate necessary areas with appropriate brightness.

[0067] <Action and effect> Next, the effects of the lighting control system 1 in the present embodiment will be described.

[0068] As described above, the lighting control system 1 according to the present embodiment includes a control unit 14 capable of setting at least two or more scenes, the first scene and the second scene, in a space using at least one of the general lighting fixtures 11 and the local lighting fixtures 12. The space includes a first area to which the first scene is applied, and a second area different from the first area to which the second scene is applied. The control unit 14 controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 so that the illuminance of the desk surface provided in the first area to which the first scene is applied is higher than that of the second scene, and controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 so as to change the area of ​​the first area and the area of ​​the second area according to the number of people staying in the space. The area of ​​the first area occupies one or more sections defined by a set of desks, or 10% or more of the entire space.

[0069] According to this, the illuminance of the desk surface provided in the first area to which the first scene is applied is high, so that the worker can work in the first area. Also, in the second area, which is not suitable for workers to work and has a lower illuminance of the desk surface than the first area, it is possible to conserve energy in this area. In this way, by setting the first area and the second area with different brightness according to the number of people staying in the space, it is possible to brighten only the necessary places compared to simply illuminating the entire space.

[0070] Therefore, according to this embodiment, it is possible to achieve both an energy saving effect and ensuring the necessary brightness in the space.

[0071] In recent years, lighting plans have been made to ensure that the brightness of a space is appropriate according to the purpose of the space, the expected work content, and the content of the activity. Lighting in a space is broadly divided into ambient lighting, which ensures the brightness of the space, and task lighting, which ensures the visibility and operability of the work surface. For example, in a general lighting system, ambient lighting and task lighting are performed simultaneously using the same lighting fixture, but in general, the lighting system effective for realizing ambient lighting is different from the lighting system effective for realizing task lighting. For this reason, in order to realize a lighting plan that is effective for efficient energy saving, it is necessary to consider ambient lighting and task lighting separately.

[0072] For example, in a space such as an office where work is performed, it is required to be bright from the viewpoint of workability. The brightness of a space cannot be estimated from the illuminance of the desk surface, and must be estimated using a photometric quantity defined based on the luminous flux incident on the eyes of the resident, such as luminance. The luminance of lighting fixtures and the luminance of openings can be estimated, and the luminance of parts such as walls and ceilings can be roughly estimated from the illuminance and reflectance of various surfaces within the field of vision of the resident. When luminance is used, detailed information about how the space appears is provided, but since the perceived brightness differs depending on the adaptation state of the resident's eyes and the contrast between the luminance in the direction in which the resident is looking and the luminance of the surroundings, it is considered desirable to obtain and examine the distribution of luminance as an image. If the walls and ceilings are illuminated in an attempt to ensure the brightness of the space, and the luminance of the walls and ceilings is increased too much, the workers' hands and the resident's face may appear dark due to the effect of luminance contrast.

[0073] The brightness of a space seen from a certain viewpoint is determined by the luminance distribution within the field of view. If the space is composed of non-glossy surfaces, the luminance distribution within the field of view excluding the light source can be estimated from the reflectance and illuminance of each of the constituent surfaces. The materials that make up a real space are glossy, making it difficult to accurately determine luminance, but in normal lighting planning, it is sufficient to know the rough state of luminance, and the luminance can be determined by treating all surfaces that make up the space as uniform diffusion surfaces. Luminance L (cd / m2 ) is proportional to the illuminance E(lx) and reflectance ρ, that is, L = (1 / π)ρE.

[0074] It is known that images that ensure an induced field of view (visual angle of 100° left and right x 85° up and down) as a field of view that is involved in the induction effect on the spatial coordinate axis can provide a high sense of realism. This induced field of view is the range of the field of view that is strongly influenced by space. It is known that the sense of brightness is proportional to the logarithm of luminance, as represented by Fechner's law. When calculating the luminance within the visual field, averaging the luminance within the induced field using the geometric mean will provide a value that is more in line with human senses. Since the luminance of most light-emitting parts within lighting fixtures is unlikely to affect the sense of brightness in a space, it is recommended to use a brightness of 1000 (cd / m2), which is clearly perceived as a light-emitting part in an indoor lighting environment. 2 ) and above should be excluded from the calculation of the geometric mean luminance within the visual field.

[0075] From the above, using the geometric mean luminance value Lg in the visual field, which is an index that appropriately defines the brightness of the space, the Feu value = 1.5 × Lg 0.7 It is considered desirable to control the sense of brightness in a space by utilizing 1000 (cd / m) in a visual field of 100° left and right and 85° up and down at a position 1.5 m above the floor. 2 The geometric mean value Lg of the luminance of the points excluding the luminance of 2.3 (cd / m 2 ) or higher.

[0076] Therefore, the lighting control system 1 according to the present embodiment includes a control unit 14 capable of setting at least two or more scenes, a first scene and a second scene, in a space in which at least one of the general lighting fixtures 11 and the local lighting fixtures 12 is used. The space also includes a first area to which the first scene is applied, and a second area different from the first area to which the second scene is applied. The control unit 14 controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 so that the illuminance of the desk surface provided in the first area to which the first scene is applied is higher than that of the second scene, controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 so that the area of ​​the first area and the area of ​​the second area are changed according to the number of people staying in the space, and controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 so that the Feu value is 5 or more when the area of ​​the first area to which the first scene is applied is the smallest.

[0077] According to this, when the area of ​​the first area to which the first scene is applied is the smallest, the Feu value is set to 5 or more, so that the worker can work in the first area. Also, in the second area, the illuminance of the desk surface is lower than that of the first area, and the worker does not work there, so that energy saving can be achieved in this area. In this way, by setting the first area and the second area to different brightness according to the number of people staying in the space, it is possible to brighten only the necessary places compared to simply illuminating the entire space.

[0078] Therefore, according to this embodiment, it is possible to achieve both an energy saving effect and ensuring the necessary brightness in the space.

[0079] Furthermore, in the lighting control system 1 of this embodiment, the control unit 14 controls at least one of the general lighting fixtures 11 and the local lighting fixtures 12 so that the illuminance of a desk surface provided in a first area to which the first scene is applied is at least twice the illuminance of a desk surface provided in a second area to which the second scene is applied.

[0080] According to this, the first area is more than twice as bright as the second area, so that the worker can easily distinguish between the first area and the second area formed in the space. Therefore, it is expected that the first area in the space will be highlighted and the eye-catching effect will be enhanced, leading the worker to the first area. In other words, the worker can easily recognize the recommended work area.

[0081] Furthermore, in the lighting control system 1 of this embodiment, the control unit 14 controls at least one of the general lighting devices 11 and the local lighting devices 12 to reduce the output of light illuminating a second area other than the first area to which the first scene is applied each time the area of ​​the first scene increases.

[0082] According to this, as the first area expands, the number of bright spots in the space increases, and the second area can be brightened by light reflected from the walls, floor, desk top, etc. Therefore, by reducing the light output in the second area, further energy savings can be achieved.

[0083] Furthermore, in the lighting control system 1 according to this embodiment, the control unit 14 controls the general lighting fixtures 11 and the local lighting fixtures 12 so that the illuminance of the desk surface located in the first area to which the first scene is applied is higher than the ambient illuminance of the surrounding area other than the desk surface.

[0084] According to this, by brightly illuminating the first area, the first area can be made to stand out in the space, and it is expected that the eye-catching effect of the first area will be enhanced to guide workers to the first area. In other words, it is possible to make workers easily recognize the recommended work area.

[0085] Moreover, the lighting control system 1 according to this embodiment further includes a display unit 15 that displays information about the space for the set scene.

[0086] This allows people to easily recognize the information about the space displayed by the display unit 15. This makes it possible to highlight the efforts of the company.

[0087] (Other variations) Although the lighting control system according to the present disclosure has been described based on the above embodiment, the present disclosure is not limited to the embodiment. As long as it does not deviate from the gist of the present disclosure, various modifications conceivable by a person skilled in the art may also be included in the scope of the present disclosure.

[0088] For example, in the lighting control system according to the above embodiment, when the last worker leaves the office space, or when no human presence is detected in the office space for a certain period of time or longer, the control unit may turn off multiple lighting devices.

[0089] For example, in the lighting control system according to the above embodiment, each of the multiple lighting devices may have a light distribution control function.

[0090] In addition, the present disclosure also includes forms obtained by applying various modifications to the above-described embodiments that a person skilled in the art may conceive, and forms realized by arbitrarily combining the components and functions of the embodiments within the scope that does not deviate from the spirit of the present disclosure.

[0091] (Additional Note) The following describes features of the lighting control system described based on the above embodiments.

[0092] <Technology 1> A control unit capable of setting at least two or more scenes of a first scene and a second scene in a space where at least one of a general lighting device and a local lighting device is used, the space includes a first area to which the first scene is applied, and a second area different from the first area to which the second scene is applied, The control unit is controlling at least one of the general lighting devices and the local lighting devices so that an illuminance of a desk surface provided in the first area to which the first scene is applied is higher than that of the second scene; at least one of the general lighting fixtures and the local lighting fixtures is controlled so as to change an area of ​​the first area and an area of ​​the second area in accordance with a number of people staying in the space; The area of ​​the first area occupies one or more sections defined by a group of desks, or 10% or more of the entire space. Lighting control system.

[0093] <Technology 2> A control unit capable of setting at least two or more scenes of a first scene and a second scene in a space where at least one of a general lighting device and a local lighting device is used, the space includes a first area to which the first scene is applied, and a second area different from the first area to which the second scene is applied, The control unit is controlling at least one of the general lighting devices and the local lighting devices so that an illuminance of a desk surface provided in the first area to which the first scene is applied is higher than that of the second scene; at least one of the general lighting fixtures and the local lighting fixtures is controlled so as to change an area of ​​the first area and an area of ​​the second area in accordance with a number of people staying in the space; At least one of the general lighting fixtures and the local lighting fixtures is controlled so that the Feu value is 5 or more when the area of ​​the first area to which the first scene is applied is minimum. Lighting control system.

[0094] <Technology 3> The control unit controls at least one of the general lighting devices and the local lighting devices so that an illuminance of a desk surface provided in the first area to which the first scene is applied is at least twice as high as an illuminance of a desk surface provided in the second area to which the second scene is applied. The lighting control system according to claim 1 or 2.

[0095] <Technology 4> The control unit controls at least one of the general lighting device and the local lighting device to reduce an output of light illuminating the second area other than the first area to which the first scene is applied, every time an area of ​​the first scene increases. The lighting control system according to any one of the first to third aspects of the present invention.

[0096] <Technology 5> The control unit controls the general lighting device and the local lighting device so that the illuminance of a desk surface provided in the first area to which the first scene is applied is higher than the ambient illuminance of a surrounding area other than the desk surface. The lighting control system according to any one of the first to fourth aspects of the present invention.

[0097] <Technology 6> Further provided is a display unit that displays information about the space for the set scene. The lighting control system according to any one of the first to fifth aspects of the present invention. [Explanation of symbols]

[0098] 1. Lighting control system 10. Lighting Equipment 11 General lighting fixtures 12 Local lighting equipment 14 Control section 15 Display section

Claims

1. A control unit capable of setting at least two or more scenes of a first scene and a second scene in a space where at least one of a general lighting device and a local lighting device is used, the space includes a first area to which the first scene is applied, and a second area different from the first area to which the second scene is applied, The control unit is controlling at least one of the general lighting fixtures and the local lighting fixtures so that an illuminance of a desk surface provided in the first area to which the first scene is applied is higher than that of the second scene; at least one of the general lighting fixtures and the local lighting fixtures is controlled so as to change an area of ​​the first area and an area of ​​the second area in accordance with a number of people staying in the space; The area of ​​the first area occupies one or more sections defined by a set of a plurality of desks, or 10% or more of the entire space. Lighting control system.

2. A control unit capable of setting at least two or more scenes of a first scene and a second scene in a space where at least one of a general lighting device and a local lighting device is used, the space includes a first area to which the first scene is applied, and a second area different from the first area to which the second scene is applied, The control unit is controlling at least one of the general lighting fixtures and the local lighting fixtures so that an illuminance of a desk surface provided in the first area to which the first scene is applied is higher than that of the second scene; at least one of the general lighting fixtures and the local lighting fixtures is controlled so as to change an area of ​​the first area and an area of ​​the second area in accordance with a number of people staying in the space; When the area of ​​the first area to which the first scene is applied is minimum, at least one of the general lighting fixtures and the local lighting fixtures is controlled so that the Feu value is 5 or more. Lighting control system.

3. The control unit controls at least one of the general lighting device and the local lighting device so that an illuminance of a desk surface provided in the first area to which the first scene is applied is at least twice as high as an illuminance of a desk surface provided in the second area to which the second scene is applied.

3. A lighting control system according to claim 1 or 2.

4. The control unit controls at least one of the general lighting device and the local lighting device to reduce an output of light illuminating the second area other than the first area to which the first scene is applied, every time an area of ​​the first scene increases.

3. A lighting control system according to claim 1 or 2.

5. The control unit controls the general lighting device and the local lighting device so that the illuminance of a desk surface provided in the first area to which the first scene is applied is higher than the ambient illuminance of a surrounding area other than the desk surface.

3. A lighting control system according to claim 1 or 2.

6. Further provided is a display unit that displays information about the space for the set scene.

3. A lighting control system according to claim 1 or 2.

Images