JP2015060790A - Lighting system and adjustment method of lighting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system which allow for improvement of the body condition of an object person, by controlling ambient lighting means and/or task lighting means automatically based on the body condition of the object person.SOLUTION: A lighting system includes an ambient lighting device 10 capable of adjusting the whole indoor lighting, a task lighting device 20 provided corresponding to an object person 2 occupying the room, and can adjust local lighting around the object person 2, a camera 30 and a personal computer 50 capable of determining the body condition of the object person 2, and the personal computer 50 for controlling operation of the ambient lighting device 10 and/or the task lighting device 20 so as to improve the body condition of the object person 2, based on the body condition of the object person 2 determined by the camera 30 and personal computer 50.

Description

  The present invention relates to a lighting system that automatically adjusts indoor lighting and a technique for adjusting the lighting.

  2. Description of the Related Art Conventionally, a lighting system that automatically adjusts indoor lighting and a technique for adjusting the lighting are known. For example, as described in Patent Document 1.

  Patent Document 1 describes an illumination system including an ambient illumination device (ambient illumination means) and a task illumination device (task illumination means), and a control device (control means) that controls each illumination device. ing.

  In general, the physical condition of the worker (subject) (specifically, the awakening or concentration of the subject) tends to deteriorate or improve according to the time zone. Therefore, in the illumination system described in Patent Document 1, the tendency is stored in advance in the control unit, and the output of each illumination unit is controlled according to the time zone. Thereby, the said lighting system can aim at the improvement of a subject's physical condition.

  However, since the illumination system described in Patent Document 1 controls each illumination unit according to a general tendency of changes in the physical condition of the subject, which is stored in advance, the control suitable for the physical condition of the actual subject is not necessarily performed. It was disadvantageous in that it could not be done.

JP 2005-235553 A

  The present invention has been made in view of the above situation, and the problem to be solved is to automatically control the ambient lighting means and / or the task lighting means based on the physical condition of the subject, and It is providing the lighting system which can aim at the improvement of a physical condition, and the adjustment method of lighting.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect of the present invention, the ambient lighting means capable of adjusting the illumination of the entire room and the target person existing in the room are provided, and the local lighting around the target person is adjusted. Possible task lighting means, physical condition determination means capable of determining the physical condition of the subject, and the ambient lighting means and / or so that the physical condition is improved based on the physical condition of the subject determined by the physical condition determination means Or a control means for controlling the operation of the task lighting means.

  According to a second aspect of the present invention, the physical condition includes a degree of concentration indicating the degree of concentration of the subject.

  According to a third aspect of the present invention, when the concentration level of the subject person is lower than a reference value, the control means has a high ratio of the illuminance by the task illumination means corresponding to the subject to the illuminance by the ambient illumination means. As described above, the operation of the ambient lighting means and / or the task lighting means is controlled.

  The control means may operate the ambient lighting means and / or the task lighting means so as to encourage the subject to take a break when the concentration level of the subject is lower than a reference value. Is to control.

  In Claim 5, the said physical condition includes the fatigue degree which shows the extent of the said subject's fatigue.

  The control means may operate the ambient lighting means and / or the task lighting means so as to encourage the subject to take a break when the fatigue level of the subject is higher than a reference value. Is to control.

  According to a seventh aspect of the present invention, the information processing apparatus further includes an informing unit capable of issuing a warning regarding the physical condition of the subject, and the control unit includes the subject's fatigue degree determined by the physical condition determining unit continuously a plurality of times. If it is higher than the reference value, a warning is issued by the notification means.

  According to an eighth aspect of the present invention, the physical condition determining means detects the subject's blink and determines the subject's physical condition based on the blink.

  In claim 9, the degree of concentration indicating the degree of concentration of the subject person in the room and the degree of fatigue indicating the degree of fatigue of the subject person are determined, and the determined degree of concentration and fatigue degree are determined. Based on the above, a lighting adjustment method for adjusting ambient lighting, which is lighting in the entire room, and / or task lighting, which is local lighting around the subject, wherein the concentration level of the subject is lower than a reference value. In the case of low, the ambient lighting and / or the task lighting is adjusted such that the ratio of the illuminance by the task lighting to the illuminance by the ambient lighting is high, and the fatigue level of the subject is higher than a reference value. In some cases, the ambient lighting and / or the task lighting is adjusted to encourage the subject to take a break.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, the ambient lighting means and / or the task lighting means can be automatically controlled based on the physical condition of the subject to improve the physical condition of the subject.

  In Claim 2, improvement (improvement) of a subject's concentration can be aimed at.

  According to the third aspect of the present invention, it is possible to improve (improve) the concentration level of the target person by increasing the ratio of the illuminance by the task illumination means to the illuminance by the ambient illumination means.

  In claim 4, by encouraging the subject to take a break, improvement (improvement) of the concentration level of the subject can be achieved.

  In Claim 5, improvement (reduction) of a subject's fatigue degree can be aimed at.

  In claim 6, by urging the subject to take a break, the subject's fatigue level can be improved (reduced).

  In Claim 7, while notifying that the improvement (reduction) of a subject's fatigue degree is difficult, the fundamental improvement of the subject's fatigue degree can be promoted.

  In Claim 8, based on a subject's blink, the said subject's physical condition can be determined automatically.

  In claim 9, by adjusting the ambient lighting and / or task lighting based on the concentration level and the fatigue level of the subject, the improvement (improvement) and the improvement (reduction) of the fatigue level of the target subject are achieved. Can be planned.

The schematic diagram which showed the whole structure of the illumination system which concerns on one Embodiment of this invention. The flowchart which shows the control by an illumination system. Similarly, the flowchart which shows the continuation of the control of FIG. Similarly, the flowchart which shows the continuation of the control of FIG. The schematic diagram which showed the coordinate of the organ of a face.

  First, the structure of the illumination system 4 which is one Embodiment of the illumination system which concerns on this invention is demonstrated using FIG.

  The lighting system 4 automatically adjusts the lighting environment in the room so that the physical condition of the person in the room 1 (in the room) is improved. In the present embodiment, it is assumed that one person (target person 2) is present in the room 1 where the illumination system 4 is provided. The lighting system 4 mainly includes an ambient lighting device 10, a task lighting device 20, a camera 30, a display device 40, and a personal computer 50.

  The ambient lighting device 10 is an embodiment of the ambient lighting means according to the present invention. The ambient lighting device 10 adjusts lighting (ambient lighting) of the entire room 1. A plurality of ambient lighting apparatuses 10 are provided on the ceiling of the room 1 at predetermined intervals. The ambient lighting device 10 can adjust the illumination of the entire room 1 by appropriately adjusting the output thereof.

  The task lighting device 20 is an embodiment of the task lighting means according to the present invention. The task lighting device 20 adjusts local lighting (task lighting) around the subject 2. The task lighting device 20 is provided corresponding to the subject 2. Specifically, the task lighting device 20 is provided on the desk 3 on which the subject 2 is seated. The task lighting device 20 can adjust the local illumination on the desk 3 which is the work space of the subject 2 by appropriately adjusting the output thereof.

  The camera 30 is an embodiment of the physical condition determining means according to the present invention. The camera 30 captures the face of the subject 2. The camera 30 is disposed in front of the subject 2 sitting on the desk 3. Specifically, the camera 30 is provided integrally with the task lighting device 20 provided corresponding to the subject 2. The camera 30 can always image the face of the subject 2 seated on the desk 3.

  The display device 40 is an embodiment of notification means according to the present invention. The display device 40 issues a warning regarding the physical condition of the subject 2. The display device 40 is configured by a liquid crystal display or the like. The display device 40 is appropriately arranged at an arbitrary position. Specifically, the display device 40 is provided in a place where a person (administrator) who is in a position to manage the physical condition of the subject 2 can visually recognize.

The personal computer 50 is an embodiment of the control means and physical condition determination means according to the present invention. The personal computer 50 determines the physical condition of the subject 2 from the face of the subject 2 captured by the camera 30 and controls the operation of the ambient lighting device 10 and the task lighting device 20 based on the determined physical condition. It is.
The personal computer 50 includes a storage unit such as a RAM and a ROM, an arithmetic processing unit such as a CPU, and the like, and can perform predetermined arithmetic processing and storage based on various information.

The personal computer 50 is connected to the ambient lighting device 10 and can control the operation of the ambient lighting device 10.
The personal computer 50 is connected to the task lighting device 20 and can control the operation of the task lighting device 20.
The personal computer 50 is connected to the camera 30 and can acquire image data captured by the camera 30.
The personal computer 50 is connected to the display device 40 and can display arbitrary information on the display device 40.

Next, in the lighting system 4 configured as described above with reference to FIGS. 2 to 5, the personal computer 50 controls the operation of the ambient lighting device 10 and the task lighting device 20, so that the lighting in the room 1 is performed. The manner of adjusting the lighting (the method of adjusting the lighting) will be described in detail.
As an initial state, the personal computer 50 has the task lighting device 20 so that the illuminance on the desk 3 by the task lighting device 20 is 300 (lx) and the illuminance on the desk 3 by the ambient lighting device 10 is 400 (lx). 20 and the operation of the ambient lighting device 10 are controlled.

In step S <b> 101 of FIG. 2, the personal computer 50 detects that the subject 2 is seated on the desk 3. Specifically, the personal computer 50 can determine from the image captured by the camera 30 whether the subject 2 is seated on the desk 3.
When it is determined that the subject person 2 is seated on the desk 3, the personal computer 50 proceeds to step S102.

In step S <b> 102, the personal computer 50 measures the accumulated time that the subject 2 is sitting on the desk 3. Specifically, the personal computer 50 starts measuring the time during which the subject 2 is seated on the desk 3 from the time when the subject 2 is seated on the desk 3 (step S101). When the subject 2 temporarily leaves the desk 3 after the start of measurement, the time during which the subject 2 has left the desk 3 is not counted as the accumulated time.
If the personal computer 50 determines that the subject person 2 has been sitting on the desk 3 for 45 minutes, the process proceeds to step S103.

In step S <b> 103, the personal computer 50 estimates the physical condition of the subject 2. Specifically, the personal computer 50 estimates “concentration” and “fatigue” as indexes indicating the physical condition of the subject 2.
Hereinafter, a method for estimating the concentration level and the fatigue level will be described in detail.

First, a method for estimating the concentration level will be described with reference to FIG.
Here, the “degree of concentration” indicates the degree of concentration of the target person 2. In the present embodiment, the “degree of concentration” is estimated based on “the number of blinks per predetermined time of the subject 2”.

  First, the personal computer 50 acquires (1) image data of the face of the subject 2 that is always imaged by the camera 30 (more precisely, every minute time).

Next, the personal computer 50 (2) converts the facial organs (eyes E and nose N) of the subject 2 shown in each acquired image data into coordinates.
Specifically, as shown in FIG. 5, the personal computer 50 uses the point P 1 as the point of the innermost end of the right eye E among the faces of the subject 2 shown in each acquired image data, and the left eye An end point located on the innermost side of E is a point P2, an end point located on the outermost side of the right nose N hole is a point P3, and an end point located on the outermost side of the left nose N hole Point P4, the uppermost end point of the upper eyelid of the right eye E as the point P5, the lowermost eyelid of the right eye E as the lower end point of the point P6, The point of the uppermost end of the left eye E is determined as a point P7, and the point of the lower end of the left eye E is determined as a point P8.

Next, the personal computer 50 (3) normalizes the coordinates of the organ of the face of the subject 2.
Specifically, the personal computer 50 performs homography transformation, affine transformation, and the like using the points P1, P2, P3, and P4, and the influence of the inclination of the face of the imaged subject 2 on the coordinates, that is, measurement. The coordinates are normalized so as to cancel the error.

Next, the personal computer 50 (4) converts the normalized coordinates of the organ of the face of the subject 2 into position information (distance information).
Specifically, the personal computer 50 converts the normalized coordinates into a distance from the point P5 to the point P6 and a distance from the point P7 to the point P8, respectively. Hereinafter, the distance from the point P5 to the point P6 is referred to as a “right eye opening degree”, and the distance from the point P7 to the point P8 is referred to as a “left eye opening degree”.

Next, the personal computer 50 compares (5) the degree of opening and closing of the right eye and the degree of opening of the left eye with the standard opening and closing degree, respectively, and when the standard opening and closing degree changes (becomes smaller) by a predetermined threshold value, the subject 2 Is determined to have blinked.
Here, the “standard opening / closing degree” is the right eye opening degree and the left eye opening degree of the subject 2 when not blinking (standard time). The standard opening / closing degree is measured in advance and stored in the personal computer 50. By storing the standard opening / closing degree for each subject 2, more accurate control can be performed.
The “predetermined threshold value” is a value that is arbitrarily set in advance, such as 3 pixels. As the predetermined threshold, it is desirable to select a value that can be determined that the subject 2 has blinked based on experiments or the like.

The personal computer 50 counts the number (frequency) per predetermined time of the blink of the subject 2 detected using (6) the blink determination method as described in (1) to (5) above.
Here, the “predetermined time” is a time arbitrarily set in advance such as 1 minute.

The personal computer 50 estimates the degree of concentration based on the number of blinks per predetermined time of the subject 2 obtained in this way.
That is, generally, since the number of blinks tends to decrease as a person concentrates on something, the degree of concentration can be estimated from the number of blinks per predetermined time. Specifically, it can be estimated that the lower the number of blinks per predetermined time, the higher the degree of concentration, and the greater the number of blinks per predetermined time, the lower the degree of concentration.

Next, a fatigue level estimation method will be described with reference to FIG.
Here, the “fatigue level” indicates the degree of fatigue of the subject 2. In the present embodiment, the “fatigue degree” is estimated based on “the ratio of the number of fatigue blinks (described later) to the number of blinks per predetermined time of the subject 2”.

  First, similarly to the above-described method of estimating the degree of concentration, the personal computer 50 acquires (1) image data of the face of the subject 2 that is always imaged by the camera 30 (exactly every minute time), 2) The facial organs (eyes E and nose N) of the subject 2 appearing in each acquired image data are converted into coordinates, (3) the coordinates of the facial organs of the subject 2 are normalized, and (4) The coordinates of the normalized organ of the face of the subject 2 are converted into position information (distance information), and (5) the right eye opening degree and the left eye opening degree are respectively compared with the standard opening degree, When it changes (becomes small) more than a predetermined threshold value, it determines with the subject 2 having blinked.

Next, the personal computer 50 has (6) the right eye opening degree and the left eye opening degree from the blink of the subject 2 detected using the blink determination method as described in (1) to (5) above. A blink is detected in which the state of changing (decreasing) by a predetermined threshold or more with respect to the standard opening / closing degree continues for a predetermined time or more.
Here, the “predetermined threshold value” is a value that is arbitrarily set in advance, such as 2 pixels. As the predetermined threshold value, it is desirable to select a value based on an experiment or the like that can be determined that the subject 2 is about to blink.
The “predetermined time” is a time arbitrarily set in advance, such as 2 (seconds). As the predetermined time, a value larger than the time required for blinking in a state where the subject 2 is not tired (normal time) is selected.
That is, the personal computer 50 detects a blink (slow blink) in which the right eye opening degree and the left eye opening degree are continuously long from the blink of the subject 2. Such a relatively slow blink is likely to occur when the subject 2 is tired. Hereinafter, such a slow blink is simply referred to as “fatigue blink”.

Next, the personal computer 50 calculates (7) the ratio of the number of fatigue blinks to the number of blinks (frequency) per predetermined time of the subject 2.
Here, the “predetermined time” is a time arbitrarily set in advance such as 1 minute.

The personal computer 50 estimates the degree of fatigue based on the ratio of the number of fatigue blinks to the number of blinks per predetermined time of the subject 2 obtained in this way.
In other words, it is generally considered that a person performs many blinks more slowly (fatigue blinks) when he / she is tired, so the degree of fatigue can be estimated from the ratio of the number of blinks of fatigue to the number of blinks per predetermined time. it can. Specifically, the lower the rate of fatigue blinks in the number of blinks per predetermined time, the lower the fatigue level, and the higher the rate of fatigue blinks in the number of blinks per predetermined time, the higher the fatigue level. Can be estimated.

  If the personal computer 50 estimates the concentration level and the fatigue level of the subject 2, the personal computer 50 proceeds to step S <b> 104.

In step S104, the personal computer 50 determines whether or not the concentration level of the target person 2 is lower than the reference value.
Specifically, when the subject 2 “the number of blinks per predetermined time is greater than a predetermined threshold”, the personal computer 50 determines that the “concentration level is lower than the reference value”. The personal computer 50 determines that the “concentration is equal to or higher than the reference value” when the subject 2 “the number of blinks per predetermined time is equal to or smaller than a predetermined threshold”.
Here, the “predetermined threshold value” is a value that is arbitrarily set in advance, such as 6 (times), for example. As the predetermined threshold, it is desirable to select a value that can determine whether or not the degree of concentration of the subject 2 is low enough to require improvement based on experiments or the like.
If the concentration level of the target person 2 is lower than the reference value, that is, if the number of blinks per predetermined time of the target person 2 is greater than the predetermined threshold, the personal computer 50 proceeds to step S105.
If the concentration level of the subject person 2 is greater than or equal to the reference value, that is, if the number of blinks per prescribed time of the subject person 2 is less than or equal to a predetermined threshold value, the personal computer 50 proceeds to step S106.

In step S105, the personal computer 50 determines whether or not the subject 2 has a fatigue level higher than the reference value.
Specifically, when the subject person 2 “the ratio of the number of fatigue blinks to the number of blinks per predetermined time is higher than a predetermined threshold”, the personal computer 50 is “the fatigue level is higher than the reference value”. Is determined. Further, the personal computer 50 determines that “the fatigue level is below the reference value” when the subject 2 “the ratio of the number of fatigue blinks to the number of blinks per predetermined time is equal to or less than a predetermined threshold”. To do.
Here, the “predetermined threshold value” is a value that is arbitrarily set in advance, such as 50 (%). As the predetermined threshold value, it is desirable to select a value that can determine whether the fatigue level of the subject 2 is high enough to require improvement based on experiments or the like.
When the degree of fatigue of the subject 2 is equal to or less than the reference value, that is, when the ratio of the number of fatigue blinks to the number of blinks per predetermined time of the subject 2 is equal to or less than a predetermined threshold, the personal computer 50 performs step S107 ( (See FIG. 3).
When the degree of fatigue of the subject 2 is higher than the reference value, that is, when the ratio of the number of fatigue blinks in the number of blinks per prescribed time of the subject 2 is higher than a predetermined threshold, the personal computer 50 performs step S110 (FIG. 3).

In step S106 transferred from step S104, the personal computer 50 determines whether the fatigue level of the subject 2 is higher than the reference value.
When the fatigue level of the subject 2 is higher than the reference value, that is, when the ratio of the number of fatigue blinks in the number of blinks per predetermined time of the subject 2 is higher than a predetermined threshold, the personal computer 50 performs step S113 (FIG. 3).
When the degree of fatigue of the subject 2 is equal to or less than the reference value, that is, when the ratio of the number of fatigue blinks to the number of blinks per predetermined time of the subject 2 is equal to or less than a predetermined threshold, the personal computer 50 performs step S119 ( (See FIG. 4).

In step S107 shown in FIG. 3 transferred from step S105, the personal computer 50 causes the task lighting device 20 to blink (flash).
Thus, the personal computer 50 prompts the subject 2 to take a short break (for example, a short break of about 5 minutes) by blinking the task lighting device 20. By allowing the subject 2 to take a short break, the concentration level of the subject 2 can be increased (improved).
The personal computer 50 keeps the task lighting device 20 blinking until the subject 2 leaves the desk 3. When the subject 2 leaves the desk 3, the personal computer 50 stops the task lighting device 20 from blinking.
After performing the process of step S107, the personal computer 50 proceeds to step S108.

In step S <b> 108, the personal computer 50 detects that the subject 2 is seated (returned) on the desk 3.
If the personal computer 50 determines that the subject 2 is seated on the desk 3, the personal computer 50 proceeds to step S109.

In step S <b> 109, the personal computer 50 increases the ratio of the illuminance by the task illumination device 20 to the illuminance by the ambient illumination device 10 (hereinafter, this ratio is simply referred to as “task / ambient ratio”). And the operation of the task lighting device 20 is controlled.
Specifically, the task lighting device 20 is configured so that the illuminance on the desk 3 by the task lighting device 20 is 500 (lx) and the illuminance on the desk 3 by the ambient lighting device 10 is 300 (lx). And the operation of the ambient lighting device 10 is controlled. By controlling in this way, the task / ambient ratio (500/300) becomes higher than the task / ambient ratio (300/400) in the initial state.
Generally, it is possible to increase (improve) the concentration of people by increasing the task / ambient ratio. Therefore, in this embodiment, the concentration of the subject 2 can be increased by controlling the operation of the task lighting device 20 and the ambient lighting device 10 to increase the task / ambient ratio.
After performing the processing of step S109, the personal computer 50 proceeds to step S103 (see FIG. 2) again.

In step S110 shown in FIG. 3 shifted from step S105 (see FIG. 2), the personal computer 50 dims the task lighting device 20 and the ambient lighting device 10.
In this way, the personal computer 50 causes the subject 2 to take a break (for example, a break of about 15 minutes) by dimming the task lighting device 20 and the ambient lighting device 10 to such an extent that the work of the subject 2 becomes difficult. ). By allowing the subject 2 to take a break, the concentration level of the subject 2 can be increased (improved) and the fatigue level can be reduced (improved).
The personal computer 50 continues the dimming of the task lighting device 20 and the ambient lighting device 10 until the subject 2 leaves the desk 3. When the subject 2 leaves the desk 3, the personal computer 50 restores the outputs of the task lighting device 20 and the ambient lighting device 10 to the output before dimming.
After performing the process of step S110, the personal computer 50 proceeds to step S111.

In step S <b> 111, the personal computer 50 detects that the subject 2 is seated (returned) on the desk 3.
When it is determined that the subject person 2 is seated on the desk 3, the personal computer 50 proceeds to step S112.

In step S112, the personal computer 50 controls the operation of the ambient lighting device 10 and the task lighting device 20 so that the task / ambient ratio becomes high.
Specifically, the task lighting device 20 is configured so that the illuminance on the desk 3 by the task lighting device 20 is 500 (lx) and the illuminance on the desk 3 by the ambient lighting device 10 is 300 (lx). And the operation of the ambient lighting device 10 is controlled. By controlling in this way, the task / ambient ratio (500/300) becomes higher than the task / ambient ratio (300/400) in the initial state.
Thus, the concentration of the subject 2 can be increased by controlling the operation of the task lighting device 20 and the ambient lighting device 10 to increase the task / ambient ratio.
After performing the process of step S112, the personal computer 50 proceeds to step S116 (see FIG. 4).

In step S113 shown in FIG. 3 shifted from step S106 (see FIG. 2), the personal computer 50 dims the task lighting device 20 and the ambient lighting device 10.
In this way, the personal computer 50 causes the subject 2 to take a break (for example, a break of about 15 minutes) by dimming the task lighting device 20 and the ambient lighting device 10 to such an extent that the work of the subject 2 becomes difficult. ). By causing the subject 2 to take a break, the fatigue level of the subject 2 can be reduced (improved).
The personal computer 50 continues the dimming of the task lighting device 20 and the ambient lighting device 10 until the subject 2 leaves the desk 3. When the subject 2 leaves the desk 3, the personal computer 50 restores the outputs of the task lighting device 20 and the ambient lighting device 10 to the output before dimming.
After performing the process of step S113, the personal computer 50 proceeds to step S114.

In step S <b> 114, the personal computer 50 detects that the subject 2 is seated (returned) on the desk 3.
If it is determined that the subject person 2 is seated on the desk 3, the personal computer 50 proceeds to step S115.

In step S115, the personal computer 50 controls the operation of the task lighting device 20 and the ambient lighting device 10 so that the illuminance by the task lighting device 20 and the ambient lighting device 10 becomes the same value as in the initial state.
Specifically, the task lighting device 20 is configured so that the illuminance on the desk 3 by the task lighting device 20 is 300 (lx) and the illuminance on the desk 3 by the ambient lighting device 10 is 400 (lx). And the operation of the ambient lighting device 10 is controlled.
After performing the process of step S115, the personal computer 50 proceeds to step S116 (see FIG. 4).

In step S116 shown in FIG. 4 shifted from step S112 or step S115 (see FIG. 3), the personal computer 50 measures the accumulated time that the subject 2 is sitting on the desk 3. Specifically, the personal computer 50 starts measuring the time during which the subject 2 is seated on the desk 3 from the time when the subject 2 is seated on the desk 3 (step S111 or step S114). When the subject 2 temporarily leaves the desk 3 after the start of measurement, the time during which the subject 2 has left the desk 3 is not counted as the accumulated time.
If the personal computer 50 determines that the subject person 2 has been sitting on the desk 3 for 45 minutes, the process proceeds to step S117.

In step S117, the personal computer 50 estimates the physical condition of the subject 2. Specifically, the personal computer 50 estimates the “degree of fatigue” of the subject 2.
When the personal computer 50 estimates the fatigue level of the subject 2, the process proceeds to step S118.

In step S118, the personal computer 50 determines whether or not the subject 2 has a fatigue level higher than the reference value.
When the degree of fatigue of the subject 2 is equal to or less than the reference value, the personal computer 50 proceeds to step S119.
When the fatigue level of the subject 2 is higher than the reference value, the personal computer 50 proceeds to step S120.

In step S119, the personal computer 50 controls the operation of the task lighting device 20 and the ambient lighting device 10 so that the illuminance by the task lighting device 20 and the ambient lighting device 10 becomes the same value as in the initial state.
Specifically, the task lighting device 20 is configured so that the illuminance on the desk 3 by the task lighting device 20 is 300 (lx) and the illuminance on the desk 3 by the ambient lighting device 10 is 400 (lx). And the operation of the ambient lighting device 10 is controlled.
After performing the processing of step S115, the personal computer 50 proceeds to step S102 (see FIG. 2) again.

In step S120 that has shifted from step S118, the personal computer 50 issues a warning that the subject 2 is in poor physical condition using the display device 40.
Specifically, the personal computer 50 displays on the screen of the display device 40 that the subject 2 may be very tired. By showing the display to the manager, the manager can be urged to manage the physical condition of the target person 2 or change the work amount.

  As described above, when the concentration level of the subject person 2 is lower than the reference value (Yes in step S104) and the fatigue level is equal to or less than the reference value (No in step S105), the subject person 2 is prompted to take a short break. By increasing the task / ambient ratio (step S109) together with (step S107), the degree of concentration can be improved.

  When the concentration level of the subject 2 is lower than the reference value (Yes in step S104) and the fatigue level is higher than the reference value (Yes in step S105), the subject 2 is encouraged to take a break (step S110). ) And the task / ambient ratio (step S112), the fatigue level can be reduced and the concentration level can be improved.

  If the concentration level of the subject person 2 is equal to or higher than the reference value (No in step S104) and the fatigue level is higher than the reference value (Yes in step S106), the subject person 2 is prompted to take a break (step S113). ), The degree of fatigue can be reduced.

  Furthermore, when it is determined that the fatigue level of the subject person 2 is higher than the reference value (Yes in step S105 or step S106), the fatigue level of the subject person 2 is then estimated again (step S117). If it is determined again that the degree of fatigue is higher than the reference value (Yes in step S118), a warning is issued (step S120), thereby fundamentally improving the physical condition of the subject 2 (physical condition management and workload) Change).

As described above, the illumination system 4 according to the present embodiment is
An ambient lighting device 10 (ambient lighting means) capable of adjusting the illumination of the entire room,
A task lighting device 20 (task lighting means) that is provided corresponding to the subject 2 who is present in the room and can adjust the local illumination around the subject 2;
A camera 30 and a personal computer 50 (physical condition determination means) capable of determining the physical condition of the subject 2;
And a personal computer 50 (control means) for controlling the operation of the ambient lighting device 10 and / or the task lighting device 20 so as to improve the physical condition based on the physical condition of the subject 2 determined by the physical condition determining means. Is.
By configuring in this way, the ambient lighting device 10 and / or the task lighting device 20 can be automatically controlled based on the physical condition of the subject 2, and the physical condition of the subject 2 can be improved.

The physical condition includes a degree of concentration indicating the degree of concentration of the subject 2.
By comprising in this way, the improvement (improvement) of the concentration level of the subject 2 can be aimed at.

In addition, the personal computer 50
When the degree of concentration of the target person 2 is lower than the reference value, the ambient lighting device 10 and the ambient lighting device 10 and the ratio of the illuminance by the task lighting device 20 corresponding to the target person 2 to the illuminance by the ambient lighting device 10 are increased. The operation of the task lighting device 20 is controlled.
In this way, by increasing the ratio of the illuminance by the task illumination device 20 to the illuminance by the ambient illumination device 10, the degree of concentration of the subject 2 can be improved (improved).

In addition, the personal computer 50
When the concentration level of the subject person 2 is lower than the reference value, the operation of the ambient lighting device 10 and / or the task lighting device 20 is controlled so as to prompt the subject person 2 to take a break.
Thus, by encouraging the subject 2 to take a break, improvement (improvement) of the degree of concentration of the subject 2 can be achieved.

The physical condition includes a fatigue level indicating the degree of fatigue of the subject 2.
By comprising in this way, the fatigue degree of the subject 2 can be improved (reduced).

In addition, the personal computer 50
When the fatigue level of the subject 2 is higher than the reference value, the operation of the ambient lighting device 10 and / or the task lighting device 20 is controlled so as to prompt the subject 2 to take a break.
In this way, by urging the subject 2 to take a break, the fatigue level of the subject 2 can be improved (reduced).

In addition, the lighting system 4
It further comprises a display device 40 (notification means) capable of issuing a warning regarding the physical condition of the subject 2,
PC 50
When the fatigue level of the subject 2 determined by the physical condition determination means is higher than the reference value twice consecutively, the display device 40 issues a warning.
With such a configuration, it is possible to notify that it is difficult to improve (reduce) the fatigue level of the subject 2 and to promote fundamental improvement of the fatigue level of the subject 2.

The physical condition determining means
The blink of the subject 2 is detected, and the physical condition of the subject 2 is determined based on the blink.
By comprising in this way, based on the blink of the subject person 2, the physical condition of the subject person 2 can be determined automatically.
Further, based on the number of blinks or the like, not only the degree of concentration and the degree of fatigue, but also pre-prediction of symptoms related to the eyes such as dry eyes can be performed, thereby preventing dry eyes and the like.

Moreover, the adjustment method of the illumination which concerns on this embodiment is
The degree of concentration indicating the degree of concentration of the subject person 2 in the room and the degree of fatigue indicating the degree of fatigue of the subject person 2 are determined, and the entire room is determined based on the determined degree of concentration and degree of fatigue. A lighting adjustment method for adjusting ambient lighting, which is the lighting of the subject, and / or task lighting, which is local lighting around the subject 2,
When the concentration level of the subject 2 is lower than a reference value, the ambient lighting and / or the task lighting is adjusted so that the ratio of the illuminance due to the task illumination to the illuminance due to the ambient illumination is increased,
When the fatigue level of the subject 2 is higher than the reference value, the ambient lighting and / or the task lighting is adjusted so as to prompt the subject 2 to take a break.
By configuring in this way, by adjusting the ambient lighting and / or task lighting based on the concentration level and fatigue level of the subject 2, improvement (improvement) of the concentration level of the subject 2 and improvement of the fatigue level (Reduction) can be achieved.

  In the present embodiment, only one subject 2 is present in the room 1, but the present invention is not limited to this, and two or more persons may be present. . In this case, the task lighting device 20 and the camera 30 are provided on the desk 3 on which each subject person 2 is seated. In such a configuration, it is possible to control the lighting so that the physical condition (concentration and fatigue) of each subject 2 is improved.

  Further, the ambient lighting means and the task lighting means according to the present invention are not limited to the ambient lighting device 10 and the task lighting device 20 according to the present embodiment, but the type (LED, organic EL, etc.), number, arrangement, etc. It is not limited.

  The control means according to the present invention is not limited to the personal computer 50 according to the present embodiment, and may be any means that can control the operation of the ambient lighting means and the task lighting means based on various information. .

  In the present embodiment, the physical condition of the subject 2 is determined based on the blink of the subject 2, but the present invention is not limited to this. That is, it is also possible to adopt a configuration in which the physical condition of the target person 2 is determined based on other information about the target person 2 (such as facial expressions and actions).

  In addition, the physical condition determination unit according to the present invention is not limited to the camera 30 and the personal computer 50 according to the present embodiment, and various devices that can determine the physical condition of the subject 2 (for example, measure the heart rate of the subject 2). It is also possible to use a device or the like.

  Moreover, the alerting | reporting means which concerns on this invention is not restricted to the display apparatus 40 which concerns on this embodiment, What is necessary is just to be able to issue the warning regarding the physical condition of the subject 2 (for example, buzzer etc.).

  Further, in the present embodiment, the display device 40 is provided in a place where the administrator can visually recognize, that is, issues a warning to the administrator. However, the notification means according to the present invention is not limited to this. . In other words, the notification unit may issue a warning to the two target persons.

  In the present embodiment, the personal computer 50 changes the task / ambient ratio by changing the outputs of both the ambient lighting device 10 and the task lighting device 20, but the present invention is not limited to this. . That is, it is possible to change the task / ambient ratio by changing the output of only one of the ambient lighting device 10 and the task lighting device 20.

  Further, the numerical values exemplified in the present embodiment, that is, the illuminance, various threshold values, time, and the like by the ambient lighting device 10 and the task lighting device 20 are examples, and each value can be set arbitrarily.

  In the present embodiment, the ambient lighting device 10 and the task lighting device 20 are blinked or dimmed when prompting the subject 2 to take a (small) break. However, the present invention is not limited to this. . That is, it is possible to arbitrarily set the control method of each lighting device when encouraging the subject 2 to take a break. For example, it is possible to perform control such that any one of the lighting devices is extinguished for a predetermined time.

  In the present embodiment, the ambient lighting device 10 and the task lighting device 20 are used when prompting the subject 2 to take a (small) break. However, the present invention is not limited to this. That is, it is also possible to adopt a configuration that encourages the subject 2 to take a (small) break by other methods. For example, it is possible to display the fact on a personal computer used by the target person 2 or notify the fact with a buzzer or the like.

  Further, in the present embodiment, the warning is given when the fatigue level of the subject 2 is higher than the reference value twice consecutively, but the present invention is not limited to this, and the fatigue of the subject 2 It is also possible to employ a configuration that warns when the degree is higher than the reference value continuously three times or more.

  In addition, as in the present embodiment, when continuously determining whether the fatigue level of the subject 2 is higher than the reference value (step S105 (or step S106) and step S118), a reference serving as a determination reference The value may be a different value. For example, if it is determined in the second time (step S118) that the fatigue level of the subject 2 is higher than the reference value, a warning is issued (step S120). The reference value may be set to a value slightly higher than the first reference value (that is, the ratio of the number of fatigue blinks to the number of blinks per predetermined time is set to a high value).

  Further, in the control as in the present embodiment, it is possible to estimate the efficiency of work performed by the subject 2 by accumulating high and low data of the concentration level and the fatigue level of the subject 2. For example, when the state in which the concentration level of the target person 2 is low (Yes in step S104) is repeated, it is estimated that the business efficiency decreases. In such a case, it is possible not only to control each lighting device but also to take measures to improve work efficiency, such as improving the work environment and changing personnel.

2 Target person 4 Lighting system 10 Ambient lighting device (ambient lighting means)
20 Task lighting device (task lighting means)
30 camera (physical condition judging means)
40 Display device (notification means)
50 PC (physical condition judging means / control means)

Claims (9)

Ambient lighting means capable of adjusting the lighting of the entire room,
Task illumination means provided corresponding to a subject who is present in the room and capable of adjusting local illumination around the subject;
Physical condition determination means capable of determining the physical condition of the subject;
A lighting system comprising: control means for controlling the operation of the ambient lighting means and / or the task lighting means so as to improve the physical condition based on the physical condition of the subject determined by the physical condition determining means. The physical condition includes a degree of concentration indicating the degree of concentration of the subject.
The lighting system according to claim 1. The control means includes
When the degree of concentration of the target person is lower than a reference value, the ambient lighting unit and / or the illuminance by the task lighting unit corresponding to the target person with respect to the illuminance by the ambient lighting unit is increased. Controlling the operation of the task lighting means;
The lighting system according to claim 2. The control means includes
When the concentration level of the subject is lower than a reference value, the operation of the ambient lighting means and / or the task lighting means is controlled so as to encourage the subject to take a break.
The illumination system according to claim 2 or claim 3. The physical condition includes a degree of fatigue indicating the degree of fatigue of the subject.
The illumination system according to any one of claims 1 to 4. The control means includes
When the fatigue level of the subject is higher than a reference value, the operation of the ambient lighting means and / or the task lighting means is controlled so as to encourage the subject to take a break.
The illumination system according to claim 5. Further comprising a notification means capable of issuing a warning regarding the physical condition of the subject,
The control means includes
When the fatigue level of the subject determined by the physical condition determination unit is higher than a reference value continuously several times, a warning is issued by the notification unit,
The lighting system according to claim 6. The physical condition judging means
Detecting the blink of the subject and determining the physical condition of the subject based on the blink;
The illumination system according to any one of claims 1 to 7. The degree of concentration indicating the degree of concentration of the subject who is present in the room and the degree of fatigue indicating the degree of fatigue of the subject are determined. Based on the determined degree of concentration and fatigue, A lighting adjustment method for adjusting ambient lighting, which is lighting, and / or task lighting, which is local lighting around the subject,
When the concentration level of the target person is lower than a reference value, the ambient lighting and / or the task lighting is adjusted so that the ratio of the illuminance due to the task lighting to the illuminance due to the ambient lighting is increased,
A lighting adjustment method for adjusting the ambient lighting and / or the task lighting so as to prompt the subject to take a break when the fatigue level of the subject is higher than a reference value.

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