Illumination space comfort evaluation system

Abstract

To provide an illumination space comfort evaluation system capable of evaluating influence of illumination light reflection on a work concentration degree.SOLUTION: An illumination space comfort evaluation system includes: a display device arranged in an illumination space so as to display examination information to be visually recognized by a subject; and a processing device for outputting information related to a work concentration degree of the illumination space based on information to be in put by the subject who visually recognizes the examination information in each one of the plurality of illumination spaces having different illumination light reflection states on a display surface of the display device.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lighting space comfort evaluation system. [Background technology]

[0002] In recent years, visual display terminals (VDT) work is being performed in many jobs. There is also a demand to evaluate the comfort of lighting spaces where VDT work and other such work is performed. Here, VDT work refers to work using VDT equipment, such as data input, writing or editing text or images, and programming. VDT equipment is one of the computer output devices, and refers to equipment that displays characters, figures, graphics, videos, etc.

[0003] For example, Patent Document 1 discloses a technique for evaluating the alertness and relaxed state of a worker in a lighting space by performing a Kraepelin test multiple times while changing lighting conditions in the lighting space. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2021 / 181664 Summary of the Invention [Problem to be solved by the invention]

[0005] Many VDT devices, such as tablets, smartphones, and touch-panel PCs, use touch panels for input. Touch panels have a high reflectivity, so if a touch panel is used in a lit space where VDT work is performed, the lighting may be reflected, decreasing the level of work concentration (work efficiency). However, Patent Document 1 does not disclose a technology for evaluating the effect that the state of reflection of lighting light on such touch panels, etc. has on the level of work concentration.

[0006] The present invention aims to provide a lighting space comfort evaluation system capable of evaluating the effect of illumination light reflection on the degree of work concentration. [Means for solving the problem]

[0007] A lighting space comfort evaluation system according to one embodiment of the present invention comprises a display device that is placed in a lighting space and displays test information to be viewed by a subject, and a processing device that outputs information regarding the level of work concentration in the lighting space based on information input by the subject who views the test information in each of a plurality of lighting spaces having different reflection states of illumination light on the display surface of the display device. Effect of the Invention

[0008] According to the present invention, it is possible to provide a lighting space comfort evaluation system capable of evaluating the effect of illumination light glare on the level of work concentration. [Brief description of the drawings]

[0009] [Figure 1] 1 is a block diagram showing a configuration of a comfort evaluation system according to a first embodiment. FIG. [Diagram 2] FIG. 2 is a schematic diagram showing test information displayed on a display device in a DAT test. [Diagram 3] FIG. 1 is a schematic diagram showing test information displayed on a display device in a Kraepelin test. [Figure 4] FIG. 2 is a schematic top view showing a first illumination space which is a first example of an evaluation target. [Diagram 5] FIG. 11 is a schematic top view showing a second illumination space which is a second example of an evaluation target. [Figure 6] 4 is a schematic cross-sectional view showing the configuration of a wall lighting device in a second lighting space. FIG. [Figure 7] FIG. 2 is a flowchart of an evaluation procedure in the comfort evaluation system according to the first embodiment. [Figure 8] FIG. 13 is a diagram showing an example of an evaluation result of the number of answers given by subjects in a Kraepelin test. [Figure 9]FIG. 1 is a diagram showing an example of an evaluation result of the error rate of subjects in a Kraepelin test. [Figure 10] FIG. 11 is a block diagram showing the configuration of a comfort evaluation system according to a second embodiment. [Figure 11] FIG. 4 is a diagram showing heart rate variability information of a subject obtained by a biosensor. [Figure 12] FIG. 1 is a diagram showing an example of an evaluation result of a subject's parasympathetic nerve activity in a Kraepelin test. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, the same components are given the same reference numerals, and duplicated explanations will be omitted as appropriate.

[0011] The following embodiments are illustrative of a lighting space comfort evaluation system for embodying the technical concept of the present invention, and the present invention is not limited to the following embodiments. The dimensions, materials, shapes, relative positions, etc. of the components described below are intended to be illustrative, and not to limit the scope of the present invention, unless otherwise specified. Furthermore, the sizes and positional relationships of the components shown in the drawings may be exaggerated to clarify the explanation.

[0012] In the following description, terms indicating specific directions or positions (such as "upper", "lower" and other terms including these terms) may be used. These terms are used merely to facilitate understanding of relative directions or positions in the drawings referenced.

[0013] [First embodiment] <Configuration of the lighting space comfort evaluation system according to the first embodiment> FIG. 1 is a block diagram showing an example of the configuration of a lighting space comfort evaluation system (hereinafter simply referred to as the comfort evaluation system) 100 according to the first embodiment.

[0014] 1, the comfort evaluation system 100 includes a display device 1 that is disposed in an illumination space and displays test information to be visually recognized by a subject. The comfort evaluation system 100 also includes a processing device 2 that outputs information related to a task concentration level based on information input by a subject who visually recognizes the test information in each of a plurality of illumination spaces in which the state of reflection of illumination light on the display surface of the display device 1 is different.

[0015] The term "illuminated space" refers to a space in which lighting devices are installed. There are no restrictions on the type, number, or location of lighting devices to be installed in the illuminated space. The subjects are people who carry out various tests, examinations, or inspections used to evaluate the comfort of illuminated spaces.

[0016] The reflection of illumination light on the display surface of the display device 1 refers to a phenomenon in which illumination light from a lighting device is reflected by the display surface of the display device 1 and enters the field of view of a person viewing the information displayed on the display device 1. The reflection of illumination light on the display surface of the display device 1 is viewed by the subject together with the test information displayed on the display device 1, reducing the subject's level of concentration on input work. The greater the degree of reflection of illumination light, the lower the subject's level of concentration on work and the lower the comfort of the lighting space. Information regarding the level of concentration on work in a lighting space corresponds to the evaluation result of the comfort of the lighting space. The level of concentration on work can also be rephrased as work efficiency.

[0017] A liquid crystal display, a plasma display, an organic EL (Electro Luminescence) display, a CRT (Cathode-ray Tube) display, etc. can be used as the display device 1. The display device 1 may display information such as letters, numbers, images, etc. under the control of the processing device 2, or may display information such as numbers or images under the control of a processing device other than the processing device 2.

[0018] The processing device 2 may be a computer such as a PC (Personal Computer). The processing device 2 is capable of various calculations, processing, control, etc. The processing device 2 may include input devices such as a mouse and a keyboard. The subject can input information to the processing device 2 via the input devices. However, the display device 1 and the processing device 2 may be integrated to form a tablet, a smartphone, a touch panel type PC, etc. In this case, the touch panel corresponds to the display device 1 and also corresponds to the input device of the processing device 2. The processing device 2 may also include an audio device such as a speaker that emits sound.

[0019] In the comfort evaluation system 100, a subject, while inside a lighting space to be evaluated by the comfort evaluation system 100, visually checks test information displayed on the display device 1 and inputs information to the processing device 2 according to the visually checked test information. In other words, the subject performs a VDT task in the lighting space to input information to the processing device 2 according to the test information displayed by the display device 1. At this time, illumination light from a lighting device equipped in the lighting space is reflected on the display surface of the display device 1. The state of reflection of the illumination light differs for each of the multiple lighting spaces to be evaluated.

[0020] The comfort evaluation system 100 outputs information on the level of task concentration based on information input by a subject who visually recognizes the test information in each of a plurality of lighting spaces having different states of reflection of illumination light on the display surface of the display device 1. This allows the comfort evaluation system 100 to evaluate the influence of the reflection of illumination light on the level of task concentration. In other words, in this embodiment, it is possible to provide a lighting space comfort evaluation system 100 that can evaluate the influence of the reflection of illumination light on the level of task concentration.

[0021] In the comfort evaluation system 100, the subject information includes a Divergent Association Task (DAT) task for performing a DAT test in which multiple words with different meanings are selected, and the information regarding the task concentration level can include an analysis result of the subject's answer to the DAT task. The DAT test is a creativity test in which multiple answer fields for answering nouns are prepared on the screen, and if a subject selects words (nouns) that are distant in meaning from each other, the subject is judged to be highly creative.

[0022] 2 is a diagram showing an example of test information in the DAT test displayed on the display device 1. In the DAT test, the comfort evaluation system 100 causes the display device 1 to display, for example, the word "dog."

[0023] When the subject sees the word "dog", he or she inputs a word that is as far removed in meaning from "dog" as possible into the processing device 2 via the input device. The further the meaning, the higher the subject's creativity. High creativity also means a high level of concentration on work. For example, comparing a case where the subject inputs the word "animal" in response to "dog" with a case where the subject inputs the word "pencil", inputting the word "pencil" indicates higher creativity and a higher level of concentration on work.

[0024] The comfort evaluation system 100 uses the processing device 2 to analyze the semantic distance of words in the subject's answer to the words in the test information displayed by the display device 1. This allows the comfort evaluation system 100 to evaluate the effect of the reflection of illumination light on the degree of concentration from the perspective of creativity. Note that the value of the subject's parasympathetic nerve activity measured separately during the DAT test and the results of psychological indicators from a separate questionnaire can also be used in analyzing the level of creativity. The parasympathetic nerve is an autonomic nerve that is predominant when the subject is resting. The parasympathetic nerve is predominant when the subject is relaxed or falling asleep.

[0025] The comfort evaluation system 100 can display various words, not limited to "dog", and analyze the semantic distance of the answer words. There is no particular limit to the display position or number of words on the display device 1, or the number of DAT tasks that the subject is to answer.

[0026] In addition, in the comfort evaluation system 100, the subject information includes a plurality of Kraepelin tasks for conducting a Kraepelin test, and the information regarding the degree of work concentration can include at least one of the number of responses and the rate of incorrect responses by the subject to the plurality of Kraepelin tasks.

[0027] 3 is a diagram showing an example of subject information displayed on a display device in a Kraepelin test. In a Kraepelin test, the comfort evaluation system 100 causes the display device 1 to display, for example, two numbers, "4" and "8." These two numbers correspond to a Kraepelin task. A subject who visually recognizes the Kraepelin task adds up the two numbers in the Kraepelin task and inputs the result as an answer to the processing device 2.

[0028] The comfort evaluation system 100 repeatedly displays Kraepelin tasks, each consisting of a pair of two numbers, on the display device 1. The subject repeatedly inputs the subject's answers for each Kraepelin task to the processing device 2. The processing device 2 calculates, for example, the number of answers and the error rate provided by the subject. For example, a larger number of answers means higher workability, and a lower error rate means higher workability.

[0029] The comfort evaluation system 100 can evaluate the effect of the reflection of illumination light on the degree of concentration from the viewpoint of workability by performing a Kraepelin test on the subject. In the Kraepelin test, there are no particular limitations on the display position of the numbers displayed on the display device 1, the number of Kraepelin tasks that the subject is to answer, etc.

[0030] In the comfort evaluation system 100, the tests, examinations, or the like used for evaluating the comfort of the lighting space are not limited to the DAT test and the Kraepelin test, and may be other tests, examinations, or the like.

[0031] <Examples of lighting spaces to be evaluated> Examples of illumination spaces to be evaluated will be described with reference to Fig. 4 to Fig. 6. Fig. 4 is a schematic top view showing a first illumination space 200a, which is a first example of the evaluation object. Fig. 5 is a schematic top view showing a second illumination space 200b, which is a second example of the evaluation object. Figs. 4 and 5 show the first illumination space 200a and the second illumination space 200b, respectively, as viewed from the direction in which the ceiling is located.

[0032] Each of the first lighting space 200a and the second lighting space 200b is an experimental space, i.e., a room, equipped with lighting devices constructed for comfort evaluation. The first lighting space 200a and the second lighting space 200b have different lighting conditions due to the different types and arrangements of the lighting devices.

[0033] First, the configuration common to the first lighting space 200a and the second lighting space 200b will be described. In Fig. 4 and Fig. 5, the entrance 210 is an entrance for entering the first lighting space 200a or the second lighting space 200b. The entrance 210 is provided with an entrance curtain 10 so that the inside of the lighting space cannot be seen from the outside. The window 220 is a window provided in imitation of a room such as a general office. The window 220 is provided with a window curtain 20.

[0034] A desk 30 is arranged on the opposite side of the entrance 210 in each of the first lighting space 200a and the second lighting space 200b. On the desk 30, the display device 1 and a keyboard 21, which is an input device provided in the processing device 2, are placed. The processing device 2 is arranged beside the desk 30, i.e., on the opposite side of the desk 30 from the window 220. The processing device 2 and the keyboard 21 are connected to be able to communicate with each other by wire or wirelessly. Note that the processing device 2 may be provided with an input device such as a mouse that can communicate with the processing device 2 by wire or wirelessly instead of or in addition to the keyboard 21.

[0035] A chair 40 is placed in front of the desk 30, i.e., on the side of the desk 30 where the entrance 210 is located. When carrying out the DAT test and the Kraepelin test, the subject sits on the chair 40 and can view the display device 1 and input information into the processing device 2 by operating the keyboard 21.

[0036] Next, the difference in configuration between the first lighting space 200a and the second lighting space 200b will be described. In Fig. 4, in the first lighting space 200a, a ceiling lighting device 300a is provided on the ceiling. The positional relationship between the ceiling lighting device 300a, the display device 1, and the chair 40 is adjusted so that the illumination light from the ceiling lighting device 300a is reflected on the display surface 11 of the display device 1 and enters the field of view of the subject viewing the display surface 11.

[0037] 4, width W1 is the width of the first illumination space 200a, and depth D1 is the depth of the first illumination space 200a.

[0038] On the other hand, as shown in Fig. 5, the second lighting space 200b is not provided with a ceiling lighting device, but instead has a wall lighting device 300b on the wall opposite the window 220. In Fig. 5, width W2 is the width of the second lighting space 200b, and depth D2 is the depth of the second lighting space 200b.

[0039] Fig. 6 is a schematic cross-sectional view showing an example of the configuration of this wall lighting device 300b. Fig. 6 shows a schematic cross-section of the wall lighting device 300b cut along a plane along the stacking direction of the multiple layers that make up the wall lighting device 300b.

[0040] 6, the wall lighting device 300b has a light source 301, a light guide plate 302, and a reflector plate 304. In the example shown in this specification, the shape of the wall lighting device 300b when viewed from the normal direction of the first main surface 3021 is substantially rectangular, but it may be substantially circular, substantially elliptical, substantially polygonal, or the like. The wall lighting device 300b is provided on the wall of the second lighting space 200b so that a second main surface 3022 opposite to the first main surface 3021 of the light guide plate 302 faces the inside of the second lighting space 200b.

[0041] The light source 301 is disposed opposite a side surface 3023 of the light guide plate 302. The side surface 3023 is one of four side surfaces intersecting with the first main surface 3021. However, the light source 301 may be disposed opposite each of two or more side surfaces among the four side surfaces intersecting with the first main surface 3021.

[0042] The light source 301 is, for example, an LED (Light-Emitting Diode) capable of emitting visible light such as white light. The light emitted from the light source 301 passes through the side surface 3023 and enters the inside of the light guide plate 302.

[0043] The light guide plate 302 is a plate-like member including resin, glass, or the like having light transmittance for the light emitted by the light source 301. For example, an acrylic resin can be used as the material for the light guide plate 302. Note that the light transmittance here is preferably 60% or more for the light emitted by the light source 301.

[0044] Light emitted from light source 301 and entering light guide plate 302 through side surface 3023 is guided through light guide plate 302 while being totally reflected by each of first main surface 3021 and second main surface 3022. A part of the light guided through light guide plate 302 passes through either first main surface 3021 or second main surface 3022 located opposite to first main surface 3021, and is extracted from the inside of light guide plate 302 to the outside.

[0045] Of the light extracted from the light guide plate 302, the light passing through the first main surface 3021 is reflected by the reflector plate 304. The light reflected by the reflector plate 304 travels in the direction in which the second main surface 3022 is located, and passes through the light guide plate 302. The light that has passed through the light guide plate 302 passes through the second main surface 3022 and is irradiated into the inside of the second illumination space 200b, becoming illumination light that illuminates the inside of the second illumination space 200b.

[0046] On the other hand, the light that passes through the second main surface 3022 out of the light extracted from the light guide plate 302 is directly irradiated into the inside of the second illumination space 200b, and becomes illumination light that illuminates the inside of the second illumination space 200b.

[0047] The illumination light from the wall lighting device 300b is planar illumination light that is illuminated from the entire second main surface 3022. The positional relationship between the wall lighting device 300b, the display device 1, and the chair 40 is adjusted, similar to the ceiling lighting device 300a, so that the illumination light from the wall lighting device 300b is reflected by the display surface 11 of the display device 1 and enters the field of view of the subject viewing the display surface 11.

[0048] <Example of the first embodiment> Hereinafter, examples of the first illumination space 200a and the second illumination space 200b will be described, but the present invention is not limited to these examples.

[0049] (Example of evaluation conditions) The size of the first lighting space 200a shown in Fig. 4 is a width W1 of 2.9m and a depth D1 of 2.2m. The height perpendicular to both the width direction and the depth direction is 2.5m. The size of the second lighting space 200b shown in Fig. 5 is a width W2 of 2.9m and a depth D2 of 2.9m. The height perpendicular to both the width direction and the depth direction is 2.5m.

[0050] The lighting conditions for the first lighting space 200a and the second lighting space 200b were an average color temperature of the top surface of the desk 30 of 4500K±10% and an average illuminance of 350Lx±5%. Table 1 shows a list of the main conditions for the first lighting space 200a and the second lighting space 200b. [Table 1]

[0051] The wall lighting device 300b placed in the second lighting space 200b had a light-emitting area with a width of 600 mm and a light-emitting area with a height of 1190 mm, i.e., a length in a direction substantially perpendicular to the width. The wall lighting device 300b was placed at a height of 1000 mm from the floor.

[0052] The subjects were 20 healthy adult males (average age 39.9±9.5 years). The order of entry into the first lighting space 200a or the second lighting space 200b was randomized. In addition, taking into consideration the subjects' fatigue, familiarity with the test, circadian rhythm, etc., the comfort of either the first lighting space 200a or the second lighting space 200b was evaluated, and then the comfort of the other of the first lighting space 200a or the second lighting space 200b was evaluated at the same time about three weeks later. The circadian rhythm refers to the rhythm of basic bodily functions such as body temperature and hormone secretion in humans, which has a cycle of about 24 hours.

[0053] <Example of evaluation procedure> Fig. 7 is a flowchart showing an example of a procedure for evaluating comfort of a lighting space in the comfort evaluation system 100. In the comfort evaluation in the comfort evaluation system 100, the procedure in Fig. 7 starts when a subject enters the lighting space (room) to be evaluated, which is a starting condition.

[0054] First, in step S11, a subject who enters the first lighting space 200a or the second lighting space 200b sits on a chair 40 and performs a DAT test. Specifically, the subject answers the DAT task by inputting information into the processing device 2 via the keyboard 21 while visually checking the information displayed on the display device 1.

[0055] For example, the comfort evaluation system 100 allows the subject to answer up to 15 nouns (excluding proper nouns and technical terms) starting from a row (e.g., the A, S, N, M rows) indicated on the display surface 11 of the display device 1, with the meanings of the nouns becoming increasingly distant from each other, in eight minutes. The DAT test ends when eight minutes have elapsed after the start of the DAT test.

[0056] Next, in step S12, the comfort evaluation system 100 displays a predetermined image on the display device 1 for a predetermined time, and outputs a sound corresponding to the image by the audio device. Even after the DAT test is completed, the subject continues to view the image and sound displayed on the display device 1 while remaining seated in the chair 40.

[0057] Next, in step S13, the subject continues to sit in the chair 40 and performs the Kraepelin test. Specifically, the subject answers the Kraepelin test by inputting information into the processing device 2 via the keyboard 21 while visually checking the information displayed on the display device 1. For example, the display device 1 displays two one-digit numbers on the display surface 11. After visually checking these, the subject performs the Kraepelin test for eight minutes, in which the subject adds up the two numbers and inputs the last digit of the sum on the keyboard 21. The Kraepelin test ends when eight minutes have elapsed since the start of the Kraepelin test.

[0058] Next, in step S14, the subject leaves the first lighting space 200a or the second lighting space 200b.

[0059] Next, in step S15, the subject answers a questionnaire about whether they were able to concentrate, whether they felt calm, whether they felt noise (reflection) on the display surface 11, etc. In the comfort evaluation system 100, if the questionnaire results show that the subjects were able to concentrate, felt calm, and did not feel noise (reflection) on the display screen, it can be determined that the comfort of the lighting space is high in terms of psychological indices.

[0060] In the above manner, the comfort evaluation system 100 can be used to evaluate the comfort of a lighting space.

[0061] (Example of evaluation results) Fig. 8 is a diagram showing an example of the evaluation result of the number of answers given by the subject in the Kraepelin test. Fig. 8 shows information 400a on the task concentration level output by the processing device 2. A graph 81 shown with dot hatching is the result in the first lighting space 200a. A graph 82 shown with oblique hatching is the result in the second lighting space 200b.

[0062] As shown in Figure 8, the number of responses in the second lighting space 200b was greater than the number of responses in the first lighting space 200a. The significant difference p in this experiment was less than 0.1 in the t-test analysis, which is a value that can be discussed in human informatics. Human informatics is a research field that targets all information possessed by humans.

[0063] Fig. 9 is a diagram showing an example of an evaluation result of the error rate of a subject in a Kraepelin test. Fig. 9 shows information 400b on the task concentration level output by the processing device 2. A graph 91 shown with dot hatching is the result in the first lighting space 200a. A graph 92 shown with oblique hatching is the result in the second lighting space 200b.

[0064] 9, the error rate in the second lighting space 200b was lower than the error rate in the first lighting space 200a. The significant difference p in this experiment was less than 0.05 in the t-test analysis, which is a value that can be discussed in human informatics.

[0065] 8 and 9, it was found that the comfort evaluation system 100 can evaluate the influence of the reflection of illumination light on the degree of concentration on work. Also, it was found that in the second illumination space 200b, the influence of the reflection of illumination light on the degree of concentration on work is smaller in terms of workability than in the first illumination space 200a.

[0066] [Second embodiment] Next, a lighting space comfort evaluation system according to the second embodiment will be described. Note that the same names and symbols as those in the already described embodiments indicate the same or similar members or components, and detailed descriptions will be omitted as appropriate.

[0067] <Configuration of lighting space comfort evaluation system according to the second embodiment> FIG. 10 is a block diagram showing an example of the configuration of a comfort evaluation system 100a according to the second embodiment.

[0068] The comfort evaluation system 100a differs from the first embodiment in that it further includes a biosensor 3 that acquires bioinformation of the subject, and the information relating to the task concentration level includes the bioinformation acquired by the biosensor 3.

[0069] The biosensor 3 may be, for example, a heart rate sensor (pulse wave sensor) capable of detecting heart rate fluctuations. The biosensor 3 is communicably connected to the processing device 2 via wire or wirelessly. The biosensor 3 is attached to a subject, and outputs bioinformation acquired from the subject undergoing at least one of the DAT test and the Kraepelin test to the processing device 2.

[0070] The comfort evaluation system 100a can evaluate the effect of the reflection of illumination light on the degree of concentration at higher accuracy by using the biological information of the subject acquired by the biological sensor 3. For example, in the comfort evaluation system 100a, the biological information can include information on the heart rate variability of the subject (heart rate variability information). Alternatively, the biological information can include at least one of information on sympathetic nerve activity and information on parasympathetic nerve activity obtained based on the information on the heart rate variability of the subject. By using these biological information, the comfort evaluation system 100a can evaluate the effect of the reflection of illumination light on the degree of concentration at higher accuracy.

[0071] <Example of the second embodiment> The biosensor 3 used was My Beat wearable heart rate sensor WHS-1 manufactured by Union Tool Co., Ltd., which is capable of detecting heart rate and heart rate variability. Using the heart rate variability information detected by the biosensor 3, RMSSD (Root Mean Square of Successive Differences of RR intervals, in msec), which is an index of parasympathetic nervous activity, was calculated. Higher parasympathetic nervous activity indicates higher concentration on work.

[0072] Here, Fig. 11 is a diagram showing heart rate variability information of a subject obtained by the biosensor 3. The R-R interval S1 in Fig. 11 means the interval between peaks of a heart rate waveform. The comfort evaluation system 100a calculates the R-R interval S1 from the heart rate variability information obtained by the biosensor 3. The comfort evaluation system 100a can calculate the above-mentioned RMSSD by calculating the square root of the average value of the squares of the differences between consecutive adjacent R-R intervals S1 as shown in the following equation.

number

[0073] The lighting conditions in the first lighting space 200a and the second lighting space 200b and the procedure for evaluating comfort were the same as those shown in the first embodiment.

[0074] Fig. 12 is a diagram showing parasympathetic nerve activity information of a subject in a Kraepelin test. Fig. 12 shows information 400c related to the task concentration level output by the processing device 2. A graph 121 shown with dot hatching is the result in the first lighting space 200a. A graph 122 shown with oblique hatching is the result in the second lighting space 200b.

[0075] 12, the sympathetic nerve activity in the second lighting space 200b was higher than the sympathetic nerve activity in the first lighting space 200a. The significant difference p in this experiment was less than 0.1 in the t-test analysis, which is a value that can be discussed in human informatics.

[0076] 12, it was found that the comfort evaluation system 100a can evaluate the effect of the reflection of illumination light on the degree of concentration on work, based on the biological information of the subject obtained by the biological sensor 3. Moreover, it was found that in the second illumination space 200b, from the viewpoint of workability, the effect of the reflection of illumination light on the degree of concentration on work is smaller than that in the first illumination space 200a.

[0077] By combining the evaluation results of the number of answers and the rate of incorrect answers in the first embodiment with the results of parasympathetic nerve activity, it is possible to evaluate with high accuracy the effect of glare from illumination light on the level of concentration on work.

[0078] Although the preferred embodiment has been described above in detail, the present invention is not limited to the above-described embodiment, and various modifications and substitutions can be made to the above-described embodiment without departing from the scope of the claims. For example, the biological information may be information based on pulse waves, brain waves, and facial expressions.

[0079] The ordinal numbers, quantities, and other numbers used in the description of the embodiments are all provided as examples to specifically explain the technology of the present invention, and the present invention is not limited to the exemplified numbers. Furthermore, the connection relationships between the components are provided as examples to specifically explain the technology of the present invention, and do not limit the connection relationships that realize the functions of the present invention.

[0080] The lighting space comfort evaluation system 100, 100a according to the embodiment can evaluate the effect of the reflection of the illumination light on the work concentration level, and therefore can evaluate the comfort of the lighting space according to the configuration and arrangement of the lighting device. Furthermore, the evaluation result by the comfort evaluation system 100, 100a can be suitably used for the design of the lighting device and the lighting space.

[0081] For example, aspects of the present invention are as follows. <1> The system for evaluating comfort of a lighting space includes a display device that is placed in a lighting space and displays test information to be viewed by a subject, and a processing device that outputs information regarding the degree of work concentration in the lighting space based on information input by the subject who views the test information in each of a plurality of lighting spaces having different reflection states of illumination light on the display surface of the display device. <2> The subject information includes a plurality of Kraepelin tasks for performing a Kraepelin test, and the information regarding the degree of concentration on the task includes at least one of the number of responses and the rate of incorrect responses by the subject to the plurality of Kraepelin tasks. <1> 1 is a lighting space comfort evaluation system according to the present invention. <3> The subject information includes a DAT task for performing a DAT test in which a subject selects a plurality of words having different meanings, and the information regarding the degree of concentration on the task includes an analysis result of the subject's response to the DAT task. <1> or the above <2> 1 is a lighting space comfort evaluation system according to the present invention. <4> a biosensor for acquiring bioinformation of the subject, and the information regarding the work concentration level includes the bioinformation acquired by the biosensor; <1> From the above <3> 1 is a lighting space comfort evaluation system according to any one of the above. <5> The biological information includes information regarding heart rate variability of the subject. <4> 1 is a lighting space comfort evaluation system according to the present invention. <6> The biological information includes at least one of information on sympathetic nerve activity and information on parasympathetic nerve activity obtained based on information on heart rate variability of the subject. <4> or the above <5> 1 is a lighting space comfort evaluation system according to the present invention. [Explanation of symbols]

[0082] 1 Display device 11 Display surface 2 Processing equipment 21 Keyboard 3. Biometric sensors 10 Entrance Curtain 20 Window Curtains 30 desks 40 Chair 81, 82, 91, 92, 121, 122 Graphs 100, 100a Comfort Rating System 200a First Lighting Space 200b 2nd lighting space 210 Entrance 220 Window 300a Ceiling lighting device 300b wall lighting device 301 Light source 3021 First main surface 3022 Second main surface 3023 Side 302 Light guide plate 304 Reflector 400a, 400b, 400c Work Intensity Information W1, W2 width D1, D2 depth S1 R-R interval

Claims

1. a display device that is disposed in the illumination space and displays test information to be visually recognized by the test subject; and a processing device that outputs information regarding the degree of work concentration in each of a plurality of lighting spaces having different reflection states of illumination light on the display surface of the display device, based on information input by the subject who visually recognizes the test information.

2. the subject information includes a plurality of Kraepelin tasks for performing a Kraepelin test, 2. The lighting space comfort evaluation system according to claim 1, wherein the information regarding the task concentration level includes at least one of the number of responses and the rate of errors by the subject to the plurality of Kraepelin tasks.

3. The subject information includes a DAT task for performing a DAT test in which a user selects a plurality of words having different meanings; 3. The lighting space comfort evaluation system according to claim 1, wherein the information regarding the degree of concentration on the task includes an analysis result of the subject's response to the DAT task.

4. The apparatus further includes a biosensor for acquiring bioinformation of the subject, The lighting space comfort evaluation system according to claim 1 , wherein the information relating to the task concentration level includes the bio-information acquired by the bio-sensor.

5. The lighting space comfort evaluation system according to claim 4 , wherein the biological information includes information regarding heart rate variability of the subject.

6. The lighting space comfort evaluation system according to claim 4 , wherein the biological information includes at least one of information regarding sympathetic nerve activity and information regarding parasympathetic nerve activity obtained based on information regarding heart rate variability of the subject.

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