CN107407593A - Illumination evaluating apparatus and illumination evaluation method - Google Patents

Abstract

Possess：Line-of-sight distance measurement portion (10), it measures line-of-sight distance, the line-of-sight distance is visual identity object is carried out the air line distance between the arbitrary position on the viewpoint position and visual identity object of the observer of the visual task of visual identity, and the visual identity object is configured in the illumination region of the illuminated illumination light from lighting source；Average line-of-sight distance calculating part (21), it calculates average line-of-sight distance, and the average line-of-sight distance is the average value for the line-of-sight distance measured within the visual task time for carrying out visual task by line-of-sight distance measurement portion (10)；Storage part (30), it is more short then to the bigger such metewand of burden of the eyes of observer that it stores average line-of-sight distance；And evaluation section (22), it is based on the above-mentioned metewand of storage in storage part (30), the quality of illumination light is evaluated according to the average line-of-sight distance calculated by average line-of-sight distance calculating part (21).

Description

Lighting evaluation device and lighting evaluation method

technical field

The present invention relates to an illumination evaluation device and an illumination evaluation method for evaluating illumination light, and a program for executing the illumination evaluation method.

Background technique

Conventionally, studies have been conducted on how illuminating light affects observers when they perform visual work (reading, etc.) for a fixed period of time in an illuminated environment, but no suitable evaluation method for evaluating illuminating light has been known.

Conventionally, there is known a technique for checking the observation method of an observer observing an object under an illumination environment (Patent Documents 1 and 2). The techniques described in Patent Documents 1 and 2 are techniques for evaluating an observer's observation method for observing an object under an illumination environment based on the visual performance of the observer, not techniques for evaluating illumination light.

Patent Document 1: Japanese Patent Laid-Open No. 2001-17392

Patent Document 2: Japanese Unexamined Patent Publication No. 2001-87225

Contents of the invention

The problem to be solved by the invention

In recent years, it has been considered to evaluate illumination light by evaluating the burden on the observer's eyes under the illumination environment. In this case, the evaluation of the illumination light is performed by measuring the degree of decrease in visual function of the tired eyes.

However, conventional methods for evaluating illumination light are methods based on subjective evaluation by observers, and it cannot be said that illumination light is properly evaluated. In other words, in the subjective evaluation of the observer, the psychological aspect and the physical condition of the observer have a great influence on the evaluation result, and therefore, quantitatively reproducible evaluation results cannot be obtained by conventional evaluation methods. Also, the evaluation must be done after eyestrain.

The present invention was made to solve such problems, and an object of the present invention is to provide an illumination evaluation device, an illumination evaluation method, and the like that can quantitatively obtain reproducible evaluation results for illumination light before eyestrain.

solutions to problems

In order to achieve the above objects, one aspect of the lighting evaluation device according to the present invention includes: a line-of-sight distance measuring unit that measures the line-of-sight distance of an observer performing a visual task of visually recognizing an object to be visually recognized. The straight-line distance between the viewpoint position of the visual recognition object and any position on the visual recognition object arranged in the illumination area irradiated with the illumination light from the illumination light source; the average line-of-sight distance calculation unit calculates an average line of sight distance, the average line of sight distance is the average value of the line of sight distances measured by the line of sight distance measurement unit during the visual work time of performing the visual work; a storage unit that stores the average line of sight distance The short is the evaluation criterion that the burden on the eyes of the observer is greater; and the evaluation unit is based on the evaluation criterion stored in the storage unit, based on the average line of sight calculated by the average line of sight distance calculation unit The distance to evaluate the quality of the illumination light.

In addition, one aspect of the lighting evaluation method according to the present invention includes a step of measuring a visual distance from a viewpoint of an observer performing a visual task of visually recognizing an object to be visually recognized. The straight-line distance between the position and any position on the visual recognition object, the visual recognition object is arranged in the illumination area irradiated with the illumination light from the illumination light source; the average line-of-sight distance calculation step, calculating the average line-of-sight distance , the average line of sight distance is the average value of the line of sight distances measured during the visual work time of performing the visual task; and the evaluation step is based on the fact that the shorter the average line of sight distance is, the greater the burden on the eyes of the observer is. According to such an evaluation criterion, the quality of the illumination light is evaluated based on the average line-of-sight distance.

In addition, the present invention can be realized not only as the lighting evaluation device and lighting evaluation method described above, but also as a program for causing a computer to execute the lighting evaluation method, or a computer-readable recording medium storing the program.

The effect of the invention

With regard to illumination light, reproducible evaluation results can be quantitatively obtained before eyestrain.

Description of drawings

FIG. 1 is a schematic diagram schematically showing the configuration of an illumination evaluation system according to an embodiment.

FIG. 2 is a block diagram showing a basic configuration of the lighting evaluation device according to the embodiment.

FIG. 3 is a diagram for explaining an example of a method of measuring a line-of-sight distance in the lighting evaluation device according to the embodiment.

FIG. 4 is a diagram showing the relationship between the illuminance of the reading surface (illumination area) and the reading distance (line-of-sight distance).

FIG. 5 is a graph showing the relationship between the reading distance (line-of-sight distance) and the amount of change in the degree of refraction.

FIG. 6 is a flowchart of the lighting evaluation method according to the embodiment.

FIG. 7 is a block diagram showing a basic configuration of an illumination evaluation device according to Modification 1. FIG.

FIG. 8 is a block diagram showing a basic configuration of an illumination evaluation device according to Modification 2. FIG.

detailed description

Embodiments of the present invention will be described below. In addition, the embodiment described below is only a preferable specific example of this invention. Therefore, numerical values, constituent elements, arrangement positions and connection forms of constituent elements, steps and the order of steps, etc. shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, the constituent elements not described in the independent claims representing the highest concept of the present invention will be described as arbitrary constituent elements.

First, each drawing is a schematic diagram and does not necessarily have to be strictly illustrated. In addition, in each figure, the same code|symbol is attached|subjected to the structure which is substantially the same, and repeated description is abbreviate|omitted or simplified.

(implementation mode)

First, the configurations of the lighting evaluation system 1 and the lighting evaluation device 100 according to the embodiment will be described using FIGS. 1 and 2 . FIG. 1 is a schematic diagram schematically showing the configuration of an illumination evaluation system according to an embodiment. FIG. 2 is a block diagram showing a basic configuration of the lighting evaluation device according to the embodiment.

[Lighting evaluation system, lighting evaluation device]

As shown in FIG. 1 , an illumination evaluation system 1 is configured to include an illumination evaluation device 100 and an illumination light source 200 , and evaluates illumination light irradiated from the illumination light source 200 . In the present embodiment, the illumination evaluation device 100 evaluates the quality of the illumination light from the illumination light source 200 based on the burden on the eyes of the observer P performing visual work under the illumination environment of the illumination light source 200 .

As shown in FIG. 1 , an observer P observes an illumination area (irradiation area) 310 irradiated by the illumination light source 200 from a viewpoint position S (the position of the eyes of the observer P). In addition, the viewpoint position S may be set as the center position of both eyes, the position of the dominant eye, or the like, and may be arbitrarily set as either the left eye or the right eye. As an example, the observer P shown in FIG. 1 is reading a book as a visual task. Specifically, the observer P reads a book placed on the table 300 as an observation object (visual recognition object) while sitting on a chair with his head not fixed by a chin rest or the like. Content. That is, the observer P observes the illuminated area 310 (irradiated surface) for a fixed time (viewing task time) by reading a book irradiated by the illumination light source 200 .

The illumination light source 200 irradiates the illumination light L toward the illumination area 310 . That is, the area irradiated with the illumination light L from the illumination light source 200 becomes the illumination area 310 . The illumination light source 200 may have a dimming function capable of changing the light output, a color adjustment function capable of changing the color temperature or light color, a light distribution control function capable of changing the light distribution angle, and the like. The illumination light source 200 is, for example, a desk lamp for illuminating the desk 300 .

As shown in FIG. 2 , the lighting evaluation device 100 includes a line-of-sight distance measurement unit 10 , a processing unit 20 , and a storage unit 30 . The lighting evaluation device 100 in this embodiment further includes a lighting condition acquisition unit 40 and a visual work time input unit 50 .

The processing unit 20 is a control unit having various control functions, and in the present embodiment, includes an average line-of-sight distance calculation unit 21 and an evaluation unit 22 .

The lighting evaluation device 100 is composed of, for example, an information processing device 110 such as a personal computer and a three-dimensional distance sensor 120 , but is not limited thereto. The three-dimensional distance sensor 120 includes, for example, an infrared projector and an infrared camera.

[Line of sight distance measurement department]

The line-of-sight distance measuring unit 10 measures the line-of-sight distance (visual distance) X which is the position S of the viewpoint P of the observer P who performs the visual task of visually recognizing the visual recognition object arranged in the illumination area 310 and Visually recognize the straight-line distance between arbitrary positions B on the object.

Here, an example of a method of measuring the line-of-sight distance X will be described using FIG. 3 . FIG. 3 is a diagram for explaining an example of a method of measuring the line-of-sight distance X in the lighting evaluation device 100 according to the embodiment.

As shown in FIG. 3 , in the three-dimensional space coordinates, the position O of the infrared camera of the three-dimensional distance sensor 120 is set as the origin (0,0,0), and the coordinates of the viewpoint position S of the observer P are set as (Xs, Ys , Zs), and let the coordinates of an arbitrary position B of a book which is a visual recognition object (the destination of the observer P's line of sight) be (W, H, D). That is, the horizontal distance from any position B of the book to the position O of the infrared camera of the three-dimensional distance sensor 120 is W, the depth is D, and the height is H.

In this case, the line-of-sight distance X can be obtained by the following formula (1).

[Formula 1]

The three-dimensional distance sensor 120 can measure the measurement distance Y which is the linear distance between the own machine (the three-dimensional distance sensor 120 ) and the viewpoint S of the observer P by recognizing the eyes of the observer P. That is, the three-dimensional distance sensor 120 can calculate the three-dimensional space coordinates (Xs, Ys, Zs) of the viewpoint position S of the observer P.

Thus, the line-of-sight distance X can be calculated from the above formula (1) using the known values of the depth D and the height H and the coordinates (Xs, Ys, Zs) of the viewpoint position S calculated by the three-dimensional distance sensor 120 . In addition, as shown in FIGS. 1 and 3 , in the present embodiment, since the three-dimensional distance sensor 120 is arranged in front of the viewpoint position S, W=0.

[Average Sight Distance Calculation Department]

The average viewing distance calculation unit 21 calculates an average viewing distance Xa which is an average value of the viewing distances X measured by the viewing distance measuring unit 10 during the visual task time during which the visual task is performed. In the present embodiment, the average gaze distance calculation unit 21 calculates the average gaze distance Xa using the time input from the visual work time input unit 50 as the visual work time. Specifically, the average line-of-sight distance Xa can be calculated as an average value of a plurality of line-of-sight distances X measured during the visual work time from the first time to the second time. For example, by setting the vision task time to 60 minutes and calculating the sight distance X of the observer P every second, the average sight distance Xa within 60 minutes can be calculated.

At this time, the observer P may temporarily interrupt the visual work during the visual work time. In this case, the line-of-sight distance X may deviate greatly from the original value. Therefore, when calculating the average line-of-sight distance Xa, the line-of-sight distance X exceeding the set range may be excluded. In other words, it is also possible to set the upper limit and the lower limit in advance, and when the calculated line-of-sight distance X exceeds the upper limit or is lower than the lower limit, the line-of-sight distance X outside the set range Excluded from the parent set when calculating the average line-of-sight distance Xa.

Furthermore, the processing unit 20 stores the calculated average line-of-sight distance Xa in association with the lighting conditions acquired by the lighting condition acquiring unit 40 in the storage unit 30 . In addition, the visual task time for calculating the average visual distance Xa may not be input from the visual task time input unit 50, and the visual task time for calculation of the average visual distance Xa may be a predetermined value (set value).

[Evaluation Department]

The evaluation unit 22 evaluates the illumination light based on the average line-of-sight distance Xa calculated by the average line-of-sight distance calculating unit 21 based on the evaluation criterion stored in the storage unit 30 that the shorter the average line-of-sight distance, the greater the burden on the observer's eyes. The pros and cons of L. For example, the shorter the average line-of-sight distance, the greater the burden on the eyes, and the evaluation is that the lighting environment is poor, and the longer the average line-of-sight distance, the smaller the burden on the eyes, and the evaluation is that the lighting environment is good. In addition, the determination of whether the average visual distance is short or long may be performed with respect to a predetermined reference value (for example, 30 cm, etc.), or by comparison with the average visual distance of other visual tasks.

In the present embodiment, the evaluation unit 22 evaluates the quality of the lighting conditions as the quality of the illumination light L. Specifically, the evaluation unit 22 evaluates the quality of the lighting conditions related to the average line-of-sight distance Xa. In this case, the evaluation unit 22 evaluates whether the lighting conditions of the lighting light L acquired by the lighting condition acquiring unit 40 are good or bad. However, when the lighting conditions are determined in advance, it is not necessary to acquire lighting conditions.

The lighting condition of the lighting light L is, for example, at least one of illuminance, color temperature, color rendering, wavelength, illuminance gradient, flicker (flicker frequency) and three primary colors (R, G, B) of light in the lighting area 310 .

In addition, the processing unit 20 in the present embodiment performs the processing for executing the average line-of-sight distance calculation unit 21 and the evaluation unit 22, but it is not limited to this processing. In addition, the processing performed by the lighting evaluation device 100 may also be performed Required operations or temporary storage of information.

[storage department]

The storage unit 30 stores evaluation criteria such that the shorter the average line-of-sight distance, the greater the burden on the observer's eyes. The storage unit 30 also stores the lighting condition acquired by the lighting condition acquiring unit 40 in association with the average viewing distance Xa calculated by the average viewing distance calculating unit 21 .

In addition, the storage unit 30 may store the line-of-sight distance X measured by the line-of-sight distance measurement unit 10, or store the average line-of-sight distance Xa calculated by the average line-of-sight distance calculation unit 21, or store the illumination light L evaluated by the evaluation unit 22. The result of the evaluation, or the lighting condition input by the user from the lighting condition acquisition unit 40 , or the visual working time input by the user from the visual working time input unit 50 is stored.

In addition, the storage unit 30 may store other information, and may also store a series of programs necessary for the processing performed by the lighting evaluation device 100 .

The storage unit 30 is shown with a logical structure, and may actually be constituted by the same hardware, or may be constituted by separate hardware. The storage unit 30 is composed of, for example, a main storage device including a volatile storage device such as SRAM or DRAM, or an auxiliary storage device including a nonvolatile storage device such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

[Lighting Condition Acquisition Department]

The lighting condition acquiring unit 40 acquires the lighting conditions of the lighting light L in the lighting area 310 . The acquired lighting conditions are input to the processing unit 20 . In the present embodiment, the lighting condition acquisition unit 40 is an input unit for inputting lighting conditions according to user operations, and is, for example, a user interface such as a keyboard, a mouse, or a touch panel.

In this case, the illumination light source 200 may also have a function of setting the illumination condition input to the illumination condition acquisition unit 40 through the user's operation to the illumination light source 200, and the illumination light source 200 illuminates the set illumination condition. Light L.

In addition, the lighting condition acquiring unit 40 is not limited to the case where the user inputs the lighting condition, and instead of the user inputting the lighting condition, a predetermined lighting condition determined in advance may be automatically acquired. In addition, when the lighting conditions are determined in advance, the lighting condition acquiring unit 40 does not need to be provided.

[Visual task time input section]

The visual task time input unit 50 is used to input the time (visual task time) when the observer P performs the visual task. The input visual work time is input to the average visual distance calculation part 21, and is used for calculating the average visual distance Xa. The visual work time input unit 50 is an input unit for inputting a visual recognition work time in advance according to a user's operation, and is, for example, a user interface such as a keyboard, a mouse, or a touch panel.

In addition, when the visual task time is a predetermined setting value, the visual task time input part 50 does not need to be provided.

[evaluation criteria]

In this way, in the present embodiment, as the evaluation criterion for evaluating the quality of the illumination light L, the criterion that the shorter the average line-of-sight distance is, the greater the burden on the observer's eyes is used, but this criterion is based on the invention of the present application. obtained from the results of the following experiments conducted by humans.

The inventors of the present application conducted experiments on the relationship between the lighting conditions of the lighting light and the burden on the eyes. In this experiment, reading a book was performed as a visual assignment. In addition, "illuminance" is used as an example of the lighting conditions of the lighting light.

Specifically, as shown in FIG. 1 , a subject sitting on a chair was asked to read a book placed in an illumination area 310 (reading surface) on a table 300 under a lighting environment with a constant illuminance. In this case, for each subject, after measuring the refraction degree of the eyes before the visual task (before reading), each subject was asked to perform a 60-minute visual task (reading), and after the visual task (after reading). ) again measured the refraction of the eye. That is, the amount of change in the refractive index before and after the visual work for a fixed period of time was obtained. In addition, in the visual work, the line-of-sight distance X (reading distance) is measured at intervals of 1 second, and the average line-of-sight distance Xa is calculated.

The experiments described above were carried out in each case where the illuminance of the illumination light L was 200 lx, 900 lx, and 1400 lx, respectively. That is, experiments were performed on three types of illumination light sources 200 (desk lamps). In this experiment, the measurement of the line-of-sight distance X was performed by the same method as above, and the illuminance was measured using an illuminance meter. In addition, the refractive power of the subject's eyes was measured with an autorefractor (refractive power measuring device). In addition, the number of subjects was set to 18, and the visual acuity of all the subjects was set to 1.0.

Through this experiment, the results shown in FIGS. 4 and 5 were obtained. 4 is a graph showing the relationship between the illuminance of the reading surface (illumination area) and the reading distance (line-of-sight distance), showing the influence of the lighting environment on the line-of-sight distance. In addition, FIG. 5 is a graph showing the relationship between the reading distance (line-of-sight distance) and the change amount of the refraction degree, and shows the correlation between the reading distance and the burden on the eyes. In addition, in FIGS. 4 and 5 , the reading distance (sight distance) represents an average value (average sight distance) within 60 minutes.

As shown in FIG. 4 , it can be seen that the higher the illuminance in the illuminated area, the longer the line-of-sight distance, and conversely, the smaller the illuminance in the illuminated area, the shorter the line-of-sight distance. That is, it can be seen that the higher the illuminance is, the more correct the observer's posture is.

In addition, as shown in FIG. 5 , it can be seen that the longer the line-of-sight distance, the smaller the change in the eye's refraction before and after reading, and conversely, the shorter the line-of-sight distance, the larger the change in the eye's refraction before and after reading.

A large amount of change in the refractive power of the eyes means a large burden on the eyes. This point will be described below.

Human beings adjust the expansion of the lens so that the light entering the eye from the object forms an image on the retina, and the focus of the eyes can be aligned to visually recognize the object. The expansion of the lens is regulated by the ciliary muscle, which regulates the refraction of the eye.

For example, when the eye is in focus on a distant object, the ciliary muscle of the eye relaxes and the lens becomes thinner. In this case, since the ciliary muscle relaxes even if the object continues to be observed at a distance, the burden on the eyes is small.

On the other hand, when a nearby object is in focus, the ciliary muscle of the eye becomes tense, and the lens becomes thicker. In this case, the ciliary muscle becomes tense when the near object is continuously observed, so that the burden on the eyes is heavy. During the period of continuous observation of nearby objects for a long time due to reading, the ciliary muscle is always tense, so the tension of the ciliary muscle continues without being relieved after reading, resulting in a high refraction. state (pseudomyopia). In other words, a large amount of change in refraction before and after reading means a large burden on the eyes.

Therefore, as shown in FIG. 5 , the shorter the line-of-sight distance, the greater the change in the refraction degree of the subject's eyes before and after reading, which means that the shorter the line-of-sight distance, the greater the burden on the eyes.

In this embodiment, the evaluation of illumination light (illumination environment) was performed using this situation as an evaluation reference.

[Lighting evaluation method]

Next, the lighting evaluation method according to the embodiment will be described using FIG. 6 with reference to FIGS. 1 to 3 . FIG. 6 is a flowchart of the lighting evaluation method according to the embodiment.

As shown in FIG. 6 , the illumination evaluation method according to this embodiment includes a line-of-sight distance measurement step S30 , an average line-of-sight distance calculation step S40 , a storage step S50 , and an evaluation step S60 . In this embodiment, a step S10 of acquiring lighting conditions and a step S20 of inputting visual work time are also included.

In the lighting condition acquiring step S10 , the lighting condition of the lighting light L in the lighting area 310 is acquired. The acquired lighting conditions are input to the processing unit 20 .

In the visual task time input step S20, the visual task time of the observer P is input. The input visual work time is input to the average line-of-sight distance calculation unit 21 .

In the line-of-sight distance measurement step S30, the line-of-sight distance X is measured, and the line-of-sight distance X is the distance between the viewpoint position S of the observer P performing the visual task of visually recognizing the object to be visually recognized and any position B on the object to be visually recognized. The visual recognition object is arranged in the illumination area 310 irradiated with the illumination light L from the illumination light source 200 . The line-of-sight distance X can be measured by the above-mentioned measurement method. The measured line-of-sight distance X is input to the average line-of-sight distance calculation unit 21 .

In the average viewing distance calculation step S40 , the average viewing distance Xa is calculated, which is an average value of the viewing distances X measured during the visual work time during which the visual work is performed. The average line-of-sight distance Xa can be calculated by the method described above.

In the storing step S50, the acquired lighting conditions are stored in association with the calculated average line-of-sight distance Xa.

In the evaluation step S60 , the quality of the illumination light L is evaluated based on the average line-of-sight distance Xa based on the evaluation criterion that the shorter the average line-of-sight distance Xa, the greater the burden on the eyes of the observer P. For example, the quality of the illumination light L is evaluated as good or bad of the lighting conditions related to the average line-of-sight distance Xa.

The evaluation result of the illumination light L (illumination condition) may be displayed on a display unit (not shown) such as a display.

In addition, the order of the above-mentioned steps is not limited to the order shown in FIG. 6 , and may be appropriately replaced. For example, the lighting condition acquisition step S10 may be performed after the visual work time input step S20. In addition, not all of the above steps are necessarily required. For example, the lighting condition acquisition step S10 and the visual work time input step S20 may not be provided.

[Summarize]

As described above, the lighting evaluation system 1 and the lighting evaluation device 100 in the present embodiment include the sight distance measurement unit 10 for measuring the sight distance X which is the visual work for visual recognition of a visual recognition object. The straight-line distance between the viewpoint position S of the observer P and any position B on the visual recognition object arranged in the illumination area 310 irradiated with the illumination light L from the illumination light source 200; the average line of sight Distance calculation part 21, it calculates average line of sight distance Xa, and this average line of sight distance Xa is the average value of the line of sight distance X that is measured by line of sight distance measuring section 10 in visual work time; Storage section 30, its storage average line of sight distance XAa The evaluation criterion that the burden on the eyes of the observer is greater if the distance is shorter; and the evaluation unit 22, based on the above-mentioned evaluation criterion stored in the storage unit 30, evaluates according to the average visual distance Xa calculated by the average visual distance calculation unit 21 The pros and cons of lighting.

In this way, in the present embodiment, the average line-of-sight distance Xa in visual work performed for a fixed period of time on the illumination area 310 of an arbitrary illumination light source 200 is calculated based on the evaluation related to the burden on the eyes of the observer in the illumination environment. As a standard, the quality of the illumination light L is evaluated based on the average line-of-sight distance Xa.

Accordingly, regarding the illumination light L (illumination environment) of the illumination light source 200 , reproducible evaluation results can be quantitatively obtained before eyestrain. That is, it is possible to quantitatively evaluate the quality of the illumination light source 200 with good reproducibility.

In addition, the evaluation results of the illumination light L or the illumination light source 200 can be expressed by points (for example, 50 points, 80 points, 100 points, etc.) or grades (for example, A-E, number of stars, etc.). In addition, by reflecting the evaluation results (points, etc.) on the price of the lighting source 200, consumers can easily select a lighting source (lamp, lighting fixture, etc.) that suits them.

In addition, in this embodiment, an illumination condition acquisition unit 40 for acquiring the illumination condition of the illumination light L in the illumination area 310 is further provided, and the evaluation unit 22 evaluates the quality of the illumination condition acquired from the illumination condition acquisition unit 40 as The pros and cons of lighting light L.

In this way, by providing the lighting condition acquisition unit 40 , it is possible to evaluate the quality of the acquired lighting conditions. Thereby, it is possible to select and evaluate required lighting conditions.

Furthermore, in the present embodiment, the storage unit 30 stores the lighting conditions acquired by the lighting condition acquiring unit 40 in association with the average viewing distance Xa calculated by the average viewing distance calculating unit 21 . Furthermore, the evaluation unit 22 evaluates the quality of the lighting conditions related to the average line-of-sight distance Xa.

In this way, by associating the lighting conditions acquired by the lighting condition acquiring unit 40 with the average viewing distance Xa calculated by the average viewing distance calculating unit 21 , it is possible to obtain an evaluation result of an appropriate lighting condition with higher accuracy.

In addition, in the present embodiment, a visual task time input unit 50 for inputting the time for performing visual tasks is further provided, and the average line-of-sight distance calculation unit 21 calculates the average line-of-sight distance using the time input from the visual task time input unit 50 as the visual task time. Distance Xa.

In this way, by providing the visual work time input unit 50 , evaluation results can be organized for each work time. Thereby, the precision of an evaluation result improves.

(Modification 1)

Next, Modification 1 will be described using FIG. 7 . FIG. 7 is a block diagram showing a basic configuration of an illumination evaluation device according to Modification 1. FIG.

Illumination evaluation device 100A according to this modified example is configured by further adding an illumination condition measurement unit 60 for measuring illumination conditions to illumination evaluation device 100 according to the above-mentioned embodiment.

The lighting condition measuring unit 60 measures, for example, lighting conditions in the lighting area 310 irradiated by the lighting light source 200 . Specifically, the lighting condition measurement unit 60 measures lighting conditions such as illuminance, color temperature, color rendering, wavelength, illuminance gradient, flicker (flicker frequency), or three primary colors of light in the lighting area 310, and inputs the lighting conditions into the lighting condition Acquisition unit 40 .

That is, the lighting condition acquiring unit 40 acquires the lighting condition from the lighting condition measuring unit 60 and inputs the lighting condition to the processing unit 20 . The lighting condition measurement unit 60 includes various measuring devices, sensors, etc., and measures the lighting conditions of a plurality of locations on the irradiation surface 12 .

In this way, the lighting condition acquisition unit 40 is not limited to the configuration for acquiring the lighting conditions by user's operation as in the above-mentioned embodiment, but may be configured to directly acquire the lighting conditions as electrical signals from various measuring instruments or the like.

As described above, according to the present modification, by providing the lighting condition measuring unit 60 , the lighting condition acquiring unit 40 can automatically input the lighting condition measured by the lighting condition measuring unit 60 to the processing unit 20 . Thereby, the input accuracy of illumination conditions improves, and the evaluation of illumination light L can be simplified.

(Modification 2)

Next, Modification 2 will be described using FIG. 8 . FIG. 8 is a block diagram showing a basic configuration of an illumination evaluation device according to Modification 2. FIG.

An illumination evaluation device 100B according to this modified example is configured by further adding an observer information input unit 70 for inputting observer information on an observer P to the illumination evaluation device 100 according to the above-mentioned embodiment. The observer information is, for example, the age, sex, eyesight, whether or not the observer P wears glasses, an identifier, and the like. The observer information input unit 70 is, for example, a user interface such as a keyboard, a mouse, or a touch panel.

In this modified example, the storage unit 30 stores the observer information input from the observer information input unit 70 in association with the average viewing distance Xa calculated by the average viewing distance calculation unit 21 .

As described above, according to this modification, by providing the observer information input unit 70 , evaluation results can be organized for each observer information. Thereby, the precision of an evaluation result improves.

(Other modified examples, etc.)

As mentioned above, although the illumination evaluation system, illumination evaluation apparatus, illumination evaluation method etc. which concern on this invention were demonstrated based on embodiment and modification, this invention is not limited to said embodiment and modification.

For example, in the above-mentioned embodiments and modifications, the illumination area 310 is a horizontal plane, but the illumination area 310 is not limited to a horizontal plane, and may be a vertical plane. For example, the observer P visually recognizes the character information on the surface (illumination area 310 ) of the vertical signboard. In this case, the illumination light source 200 is installed obliquely above the front of the illumination area (irradiation surface) 310 which is a vertical plane, and irradiates the illumination light L toward the illumination area 310 . Then, the observer P observes the illumination area 310 irradiated by the illumination light source 200 from the viewpoint S, for example, in a state where the head is not fixed while standing.

In addition, in the above-mentioned embodiments and modified examples, the illumination evaluation device may include a display unit (not shown) for displaying the evaluation result of the illumination light L (illumination condition) or a display unit (not shown) for evaluating the illumination light L (illumination condition). A speaker (not shown) for sound output of the evaluation result.

In addition, in the above-described embodiments and modifications, the illumination evaluation device may comprehensively evaluate the illumination light (illumination light source) and the burden on the eyes of the observer P in consideration of the power consumption of the illumination light source and the like.

In addition, forms obtained by adding various modifications conceivable to those skilled in the art to the above-mentioned embodiment and modified examples, or by combining the configurations of the above-mentioned embodiment within the range not departing from the gist of the present invention Embodiments realized by arbitrarily combining elements and functions are also included in the present invention.

In addition, in the above description, each configuration in the processing unit 20 may be a circuit. These circuits may constitute one circuit as a whole, or may be different circuits. In addition, each of these circuits may be a general-purpose circuit or a dedicated circuit.

In addition, the processing described as the operation of the lighting evaluation device 100 by the processing unit 20 and the like may be executed by a computer. For example, a computer executes a program using hardware resources such as a processor (CPU), a memory, and an input/output circuit to execute the above-described processes. Specifically, the processor acquires data to be processed from a memory, an input/output circuit, or the like, calculates the data, or outputs a calculation result to the memory, the input/output circuit, or the like, to execute each process.

In addition, a program for executing each of the above-mentioned processes may be recorded on a non-transitory storage medium such as a computer-readable CD-ROM. In this case, the computer executes each process by reading the program from a non-transitory storage medium and executing the program. For example, the method in the lighting system described above can also be realized as a program executed by a computer, or as a computer-readable storage medium in which such a program is recorded.

Explanation of reference signs

1: Lighting evaluation system; 10: Line of sight distance measurement section; 21: Average line of sight distance calculation section; 22: Evaluation section; 30: Storage section; 40: Lighting condition acquisition section; 50: Vision operation time input section; 60: Lighting condition 70: observer information input unit; 100, 100A, 100B: lighting evaluation device; 200: lighting source; 300: table; 310: lighting area.

Claims (9)

1. A lighting evaluation device, comprising: The line-of-sight distance measurement unit measures the line-of-sight distance, wherein the line-of-sight distance is the distance between the viewpoint position of the observer who performs the visual work of visually recognizing the object to be visually recognized and any position on the object to be visually recognized a linear distance, the visual recognition object is arranged in an illumination area irradiated with illumination light from an illumination light source; an average line-of-sight distance calculation unit that calculates an average line-of-sight distance that is an average value of the line-of-sight distances measured by the line-of-sight distance measurement unit during a visual task time during which the visual task is performed; a storage unit that stores the evaluation criterion that the shorter the average line-of-sight distance is, the greater the burden on the observer's eyes is; and An evaluation unit that evaluates the quality of the illumination light based on the average line-of-sight distance calculated by the average line-of-sight distance calculation unit based on the evaluation criteria stored in the storage unit. 2. The lighting evaluation device according to claim 1, wherein: further comprising an illumination condition acquisition unit that acquires an illumination condition of the illumination light in the illumination area, The evaluation unit evaluates the quality of the lighting conditions as the quality of the illumination light. 3. The lighting evaluation device according to claim 2, characterized in that, The storage unit further stores the lighting condition acquired by the lighting condition acquiring unit in association with the average line-of-sight distance calculated by the average line-of-sight distance calculation unit, The evaluation unit evaluates the quality of the lighting conditions related to the average line-of-sight distance. 4. The lighting evaluation device according to any one of claims 1 to 3, wherein: further comprising a lighting condition measuring unit that measures the lighting condition, The lighting condition acquiring unit acquires the lighting condition from the lighting condition measuring unit. 5. The lighting evaluation device according to any one of claims 2 to 4, wherein: The lighting condition is at least one of illuminance, color temperature, color rendering, wavelength, illuminance gradient, flicker, and three primary colors of light in the lighting area. 6. The illumination evaluation device according to any one of claims 1 to 5, wherein: It also includes a visual task time input unit for inputting the time for performing the visual task, The average viewing distance calculating unit calculates the average viewing distance using the time input by the visual working time input unit as the visual working time. 7. The illumination evaluation device according to any one of claims 1 to 6, wherein: further comprising an observer information input unit for inputting observer information related to the observer, The storage unit stores the observer information input by the observer information input unit in association with the average line-of-sight distance. 8. A lighting evaluation method, comprising the following steps: The line-of-sight distance measurement step is to measure the line-of-sight distance, wherein the line-of-sight distance is a straight line between the position of the viewpoint of the observer who performs the visual work of visually recognizing the object to be visually recognized and any position on the object to be visually recognized distance, the visual recognition object is arranged in an illumination area irradiated with illumination light from an illumination light source; An average line-of-sight distance calculation step, calculating an average line-of-sight distance, the average line-of-sight distance being the average value of the line-of-sight distances measured during the visual task time during which the visual task is performed; and In the evaluation step, the quality of the illumination light is evaluated based on the average line-of-sight distance based on an evaluation criterion that the shorter the average line-of-sight distance, the greater the burden on the observer's eyes. 9. A program for causing a computer to execute the lighting evaluation method according to claim 8.