Solar radiation grasping system, terminal device, solar radiation grasping program, and solar radiation grasping method

Abstract

To provide a solar radiation grasping system, a terminal device, a solar radiation grasping program and a solar radiation grasping method capable of grasping a solar radiation that a user should or can receive.SOLUTION: A solar radiation grasping system comprises: a solar radiation acquisition unit that acquires a measured solar radiation; a solar radiation calculation unit that calculates a recommended solar radiation, which is a solar radiation that a user should or can receive in a day, and calculates a total solar radiation the user has already received in a day based on the solar radiation acquired by the solar radiation acquisition unit; and a solar radiation display unit that compares the recommended solar radiation with the total solar radiation, and when the recommended solar radiation is greater, displays a difference between the recommended solar radiation and the total solar radiation as a remaining recommended solar radiation, which is a residue of the recommended solar radiation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a solar radiation amount determining system, a terminal device, a solar radiation amount determining program, and a solar radiation amount determining method. [Background technology]

[0002] Sun exposure is known to have many health benefits.

[0003] Patent document 1 describes a system that determines recommended times for lifestyle events (eating, bathing, drinking, smoking, exercise, naps, etc.) that a user should perform between the time the user wakes up and the time the user goes to bed (time the user goes to bed) in order to improve the quality of the user's sleep, and determines a recommended schedule for the user based on the recommended times for the determined lifestyle events. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-201642 Summary of the Invention [Problem to be solved by the invention]

[0005] The human body changes basic functions such as body temperature, blood pressure, and hormone secretion in accordance with the 24-hour cycle caused by the Earth's rotation. This approximately 24-hour rhythm is called the circadian rhythm. The amount of light humans are exposed to, particularly sunlight, has a significant impact on circadian rhythms. However, it has been difficult to determine how much sunlight a person should be exposed to in their daily lives.

[0006] An object of the present invention is to provide a solar radiation amount grasping system, a terminal device, a solar radiation amount grasping program, and a solar radiation amount grasping method that can grasp the amount of solar radiation that should or can be received. [Means for solving the problem]

[0007] The solar radiation amount grasping system of the present disclosure is a solar radiation amount grasping system that includes a solar radiation amount acquiring unit that acquires a measured amount of solar radiation, a solar radiation amount calculating unit that calculates a recommended solar radiation amount, which is the amount of solar radiation that should or may be received in a day, and calculates a total amount of solar radiation that has already been received in the day based on the amount of solar radiation acquired by the solar radiation amount acquiring unit, and a solar radiation amount display unit that compares the recommended solar radiation amount with the total solar radiation amount, and, if the value of the recommended solar radiation amount is greater, displays the difference between the recommended solar radiation amount and the total solar radiation amount as a remaining recommended solar radiation amount, which is the remaining amount of recommended solar radiation.

[0008] The terminal device of the present disclosure is a terminal device equipped with a solar radiation amount display unit that, when a recommended solar radiation amount, which is the amount of solar radiation that should or may be received in a day, is greater than the total amount of solar radiation already received in that day, displays the difference between the recommended solar radiation amount and the total amount of solar radiation as the remaining recommended solar radiation amount, which is the remaining amount of recommended solar radiation.

[0009] The solar radiation amount grasping program of the present disclosure is a solar radiation amount grasping program for causing a computer to execute a solar radiation amount display step of displaying the difference between the recommended solar radiation amount, which is the amount of solar radiation that should or may be received in a day, as the remaining recommended solar radiation amount, which is the remaining recommended solar radiation amount, when the recommended solar radiation amount is greater than the total solar radiation amount already received in that day.

[0010] The solar radiation amount grasping method disclosed herein is a solar radiation amount grasping method that calculates a recommended solar radiation amount, which is the amount of solar radiation that should or can be received in a day, acquires the measured solar radiation amount, calculates the total amount of solar radiation already received in the day based on the acquired solar radiation amount, compares the recommended solar radiation amount with the total solar radiation amount, and if the value of the recommended solar radiation amount is greater, displays the difference between the recommended solar radiation amount and the total solar radiation amount as the remaining recommended solar radiation amount, which is the remaining recommended solar radiation amount. [Effects of the Invention]

[0011] According to the solar radiation amount determining system, terminal device, solar radiation amount determining program, and solar radiation amount determining method of the present disclosure, it is possible to determine the amount of solar radiation that should or can be received. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a diagram illustrating a configuration of a solar radiation amount determination system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a diagram illustrating an example of a hardware configuration of a terminal device. [Figure 3] FIG. 2 is a diagram illustrating an example of a hardware configuration of a measurement device. [Figure 4] FIG. 2 is a block diagram illustrating an example of a functional configuration of a terminal device. [Figure 5] 10 is a flowchart illustrating an example of a solar radiation amount grasping process. [Figure 6] FIG. 10 is a diagram showing an example of a solar radiation amount display screen. [Figure 7] FIG. 10 is a diagram showing another example of the solar radiation amount display screen. [Figure 8] FIG. 10 is a diagram showing an example of a setting screen for sunbathing conditions. [Figure 9] 10 is a flowchart illustrating an example of a sunbathing condition route display process. [Figure 10] FIG. 10 is a diagram showing an example in which a route from a departure point to a destination is displayed together with route information. [Figure 11] FIG. 10 is a diagram illustrating an example of a current location route display process. [Figure 12] FIG. 10 is a diagram showing an example in which a route from a current location to a destination is displayed together with route information. [Figure 13] 10A and 10B are diagrams illustrating different examples of functional configurations of terminal devices. [Figure 14] FIG. 10 is a block diagram illustrating an example of a functional configuration of a terminal device that performs processing based on the duration of insolation. [Figure 15] 10A and 10B are diagrams illustrating different examples of the functional configuration of a terminal device that performs processing based on the duration of insolation. DETAILED DESCRIPTION OF THE INVENTION

[0013] A solar radiation amount determination system, a terminal device, a solar radiation amount determination program, and a solar radiation amount determination method according to the present disclosure will be described with reference to the drawings. In the description, like elements will be assigned like reference numerals, and duplicate descriptions will be omitted as appropriate.

[0014] Fig. 1 is a diagram illustrating the configuration of a solar radiation amount determination system 1 according to an embodiment of the present disclosure. As shown in Fig. 1, the solar radiation amount determination system 1 includes a server device 2 connected to a communication network 3, a terminal device 4 connected to the server device 2 via the communication network 3, and a measurement device 5 that is connected to the terminal device 4 via wired or wireless communication and measures the amount of solar radiation. The terminal device 4 and the measurement device 5 may be carried by a user 9 and move along with the user 9. Here, the measurement device 5 may be included in the terminal device 4.

[0015] 1, the communication network 3 may be a communication network including the Internet. The server device 2 may be, for example, a cloud server or an edge computing server. The terminal device 4 may be, for example, a smartphone, a personal computer, a tablet terminal, a wearable terminal, etc.

[0016] 2 is a diagram showing an example of the hardware configuration of the terminal device 4. As shown in this diagram, the terminal device 4 can be a so-called information processing device configured mainly with electronic circuits using semiconductor circuit elements. For example, the terminal device 4 can include a CPU (Central Processing Unit) 41, a volatile storage unit 42 such as a RAM (Random Access Memory), a non-volatile storage unit 43 such as a flash memory or a hard disk, and a communication unit 44 that connects to the communication network 3 to communicate and communicates with the measuring device 5 via wired or wireless connections to acquire measurement results. The terminal device 4 can also include a location information acquisition unit 45 that has an antenna for using a satellite positioning system to acquire current location information, an input unit 46 such as a keyboard or touch panel, and an output unit 47 such as a display device or speaker.

[0017] FIG. 3 is a diagram showing an example of the hardware configuration of the measurement device 5. Similar to the terminal device 4 of FIG. 2, the measurement device 5 may be a so-called information processing device. For example, similar to the terminal device 4, the measurement device 5 may include a CPU 51, a volatile memory unit 52, a non-volatile memory unit 53, and a communication unit 54, and may further include a sensor unit 55 that measures the amount of solar radiation. The measurement of the amount of solar radiation may be performed by the sensor unit 55 including, for example, a photometer, an actinometer, or a solar cell. Although not shown, the server device 2 may be a so-called information processing device similar to the terminal device 4 of FIG. 2, and may include, for example, a CPU, a volatile memory unit, a non-volatile memory unit, and a communication unit. The server device 2 may be configured by a plurality of information processing devices, or may have a similar configuration as a virtual system.

[0018] Specific processing by the solar radiation amount determining system 1 will be described below, but the processing performed by the solar radiation amount determining system 1 can be realized by software that operates the above-mentioned hardware.

[0019] Fig. 4 is a block diagram showing an example of the functional configuration of the terminal device 4. Each function of the functional configuration shown in Fig. 4 is realized by the hardware shown in Fig. 2 operating in association with programs and data stored in the volatile storage unit 42 and the non-volatile storage unit 43. As shown in Fig. 4, the terminal device 4 has a solar radiation amount calculation unit 401, a solar radiation amount acquisition unit 402, and a solar radiation amount display unit 403. The terminal device 4 may further have a route display unit 404 and a condition setting unit 405.

[0020] Here, the solar radiation amount calculation unit 401 calculates a recommended solar radiation amount, which is the amount of solar radiation that should or can be received in a day. The recommended solar radiation amount may be an amount of solar radiation set according to the purpose of use of the user of the terminal device 4. For example, if the purpose is to improve sleep or strengthen bone density, the recommended solar radiation amount is calculated as the amount of solar radiation that should be received in a day. On the other hand, if the purpose is, for example, skin care, the recommended solar radiation amount is calculated as the amount of solar radiation that can be received. Here, depending on each purpose, an excessive solar radiation amount, which is the amount of solar radiation that is considered excessive, may be calculated. Here, the excessive solar radiation amount may be calculated alone or together with the recommended solar radiation amount. In the following description, the "recommended solar radiation amount" will be used as an example, but the term "recommended solar radiation amount" may also be read as "excess solar radiation amount" or "recommended solar radiation amount and excessive solar radiation amount." The solar radiation amount acquisition unit 402 acquires the amount of solar radiation measured by the measurement device 5, for example, from the measurement device 5. If the measuring device 5 is provided within the terminal device 4, the solar radiation amount may be acquired from the measuring device 5 provided within the terminal device 4. The solar radiation amount calculation unit 401 may also calculate the total amount of solar radiation already received in a day based on the amount of solar radiation acquired by the solar radiation amount acquisition unit 402. In this case, the solar radiation amount display unit 403 compares the recommended amount of solar radiation with the total amount of solar radiation, and if the value of the recommended amount of solar radiation is greater, displays the difference between the recommended amount of solar radiation and the total amount of solar radiation as the remaining recommended amount of solar radiation. The route display unit 404 acquires and displays a route from the departure point to the destination calculated based on map information. In this case, the solar radiation amount calculation unit 401 calculates, based at least on meteorological information, an estimated route amount of solar radiation, which is the amount of solar radiation received along the route. The route display unit 404 can further display the route together with route information display showing information related to the recommended amount of solar radiation for the estimated route amount of solar radiation.

[0021] FIG. 5 is a flowchart illustrating an example of the solar radiation grasping process S100 provided by the terminal device 4 using the solar radiation grasping system 1. The solar radiation grasping process S100 described below is an example of processing in which a user of the terminal device 4 searches for a route from a departure point, such as a current location, to a destination and travels along the searched route. As shown in this figure, the solar radiation grasping process S100 first displays a recommended solar radiation amount in step S101. For example, as shown in the example of a solar radiation amount display screen 450 of the terminal device 4 illustrated in FIG. 6, the recommended solar radiation amount, total solar radiation amount, and remaining recommended solar radiation amount are displayed in a recommended solar radiation amount display area 452, a total solar radiation amount display area 453, and a remaining recommended solar radiation amount display area 451, respectively. Here, the recommended solar radiation amount is the amount of solar radiation that should or may be received on that day, and may be calculated by the solar radiation amount calculation unit 401. The total amount of solar radiation is the amount of solar radiation already received that day and can be calculated by the solar radiation calculation unit 401 based on the amount of solar radiation acquired by the solar radiation acquisition unit 402, for example, via wired or wireless communication from the measurement device 5. The remaining recommended amount of solar radiation is the difference between the recommended amount of solar radiation and the total amount of solar radiation when the recommended amount of solar radiation is greater. This difference can be calculated and displayed by the solar radiation display unit 403 as the remaining recommended amount of solar radiation. While FIG. 6 shows that the recommended amount of solar radiation, the total amount of solar radiation, and the remaining recommended amount of solar radiation are all displayed, any one or more of these can be displayed. In FIG. 6, watt-hours (Wh) are used as the unit of solar radiation; however, other units may be used depending on the values measured by the measurement device 5, as described below. Furthermore, when excess solar radiation is also calculated, the excess solar radiation may also be displayed in the excess solar radiation display area 455, as shown in FIG. 7. In addition to the amount of solar radiation for that day, the amount of solar radiation received may be displayed on a weekly basis in the solar radiation amount display area 456, or on a monthly basis in the solar radiation amount display area 457.

[0022] The recommended solar radiation amount can vary depending on, for example, a preset mode. For example, the modes can include a sleep improvement mode, a bone density enhancement mode, and a skin care mode. In each of these modes, the solar radiation amount calculation unit 401 calculates the recommended solar radiation amount so as to further improve at least one of the serotonin secretion amount, the vitamin D synthesis amount, and the UV exposure amount. Regarding the sleep improvement mode, melatonin is generally known as a sleep hormone secreted in the brain, but the brain hormone serotonin is required to produce melatonin. Unlike melatonin, serotonin is secreted during the daytime, and when light enters the eyes, it reacts with tryptophan, a type of protein, to produce serotonin. Therefore, the sleep improvement mode is a mode that aims to improve sleep by improving the serotonin secretion amount related to the amount of solar radiation. In the bone density enhancement mode, bone density is known to be improved by vitamin D, which is synthesized when the skin is exposed to ultraviolet rays (UV-B) contained in sunlight. Therefore, this mode aims to strengthen bone density by improving the amount of vitamin D synthesis related to sunlight. On the other hand, too much exposure to the ultraviolet components (UV-B) contained in sunlight can cause skin inflammation known as "sunburn," and the skin care mode is set to prevent this.

[0023] The solar radiation amount calculation unit 401 calculates the recommended solar radiation amount that will further improve one of the items of sleep improvement, bone density enhancement, and skin care, and the recommended solar radiation amount for sleep improvement, bone density enhancement, and skin care can be calculated taking into account at least one of the amount of serotonin secretion, the amount of vitamin D synthesis, and the amount of ultraviolet light exposure.

[0024] Here, the recommended amount of solar radiation refers to the amount of solar radiation that a user should or can receive in a day. The recommended amount of solar radiation in the sleep improvement mode or bone density enhancement mode refers to the amount of solar radiation that a user should receive on that day. The recommended amount of solar radiation in skin care refers to the amount of solar radiation that a user can or can receive on that day. The measurement device 5 may measure the amount of solar radiation using a measuring device such as a photometer, pyranometer, or solar cell. The total amount of solar radiation may be calculated by multiplying and accumulating the values measured by these measuring devices. In the case of a solar cell, the total amount of solar radiation may be the amount of power generated. The recommended amount of solar radiation may be measured using the unit measured by the measuring device. In this embodiment, the amount of power generated is expressed in watt-hours (Wh), but other units such as joules (J) may also be used. Therefore, the solar radiation amount assessment system 1 of the present disclosure displays the remaining recommended amount of solar radiation, which is the remaining amount of solar radiation that a user should or can receive throughout the day, allowing the user to assess the remaining amount of solar radiation that a user should or can receive. Furthermore, the user can assess the amount of solar radiation that a user should or can receive in the desired mode. Here, the terminal device 4 may not have a mode setting function and may operate in any one of the sleep improvement mode, bone density enhancement mode, and skin care mode.

[0025] Next, in step S102 of FIG. 5, the user inputs the departure point, destination, and the date and time when the route will be used to search for a route to the destination. Here, the current location can be used as the departure point, and the current time can be used as the date and time. The current location may be obtained by acquiring location information using a satellite positioning system by the location information acquisition unit 45. Next, in step S103, the user of the terminal device 4 inputs whether or not to display a route taking sunbathing conditions into consideration. If the user selects to display a route taking sunbathing conditions into consideration (step S103: Yes), in step S105, the condition setting unit 405 of the terminal device 4 outputs a screen for selecting whether or not to set sunbathing conditions. If the user selects to set sunbathing conditions (step S105: Yes), a sunbathing condition setting screen 470 is displayed (step S106).

[0026] FIG. 8 shows an example of a sunbathing condition setting screen 470. On the sunbathing condition setting screen 470, for example, as shown in setting item 471, the range of solar radiation (sun exposure) to be received along the route can be set. This allows the user to individually set not only the recommended solar radiation and the remaining recommended solar radiation, but also the amount of solar radiation that should or can be received along the route, thereby adjusting the amount of solar radiation to be received along the route. Setting item 472 allows the range of travel distance along the route to be set. Although the shortest distance along a route is inevitably determined, even when a route that satisfies the solar radiation condition by taking a detour is selected, setting a maximum travel distance can prevent the route from being longer than expected. Furthermore, when a certain travel distance is desired, entering a minimum travel distance allows a route with a travel distance greater than the minimum value to be obtained. Therefore, the user can set the range of the route distance to be traveled according to their physical strength and physical condition.

[0027] In setting item 473, a travel time range for a route can be set. This allows the user to determine a travel time range that fits their schedule. In addition, in setting item 474, a target travel speed can be set. The target travel speed can be, for example, brisk walking, normal walking, or slow walking. This allows the solar radiation amount calculation unit 401 to calculate the solar radiation amount and travel time for a route based on the user's travel speed (walking speed). In addition, in setting item 475, a mode can be set. Here, the mode may be any of the above-mentioned sleep improvement mode, bone density enhancement mode, and skin care mode. Here, the mode set for each route may be set independently of the above-mentioned daily mode, or may be set as the same as the above-mentioned daily mode. In either case, the mode may be set as a condition that takes into account the recommended solar radiation amount and the remaining recommended solar radiation amount. Alternatively, a daily mode may not be set, and the mode may be set only for the route. The amount of solar radiation, travel distance, and travel time are specified as ranges including upper and lower limit values, but it is also possible to specify only the upper limit value or only the lower limit value, or not to specify each value.

[0028] In this way, the condition setting unit 405 can set conditions acceptable to the user as conditions to be referenced when calculating a route. Specifically, any one or all of the range of estimated solar radiation for the route, the range of travel distance, the range of travel time, and the target travel speed can be set. Furthermore, the condition setting unit 405 can set, for example, a condition for further improving one of sleep improvement, bone density enhancement, and skin care as a mode setting, and each of the conditions for sleep improvement, bone density enhancement, and skin care can be a condition for further improving at least one of the amount of serotonin secretion, the amount of vitamin D synthesis, and the amount of ultraviolet light exposure. This allows the user to understand the amount of solar radiation that should or can be exposed to in the set mode.

[0029] Returning to FIG. 5, once the setting of the sunbathing conditions is complete, the process proceeds to the sunbathing condition route display process S200 in step S107. If no selection is made to set the sunbathing conditions (step S105: No), the sunbathing condition setting screen 470 is not displayed and the process proceeds to the sunbathing condition route display process S200. If no selection is made to set the sunbathing conditions, the most recently set conditions may be set as they are, or the ranges of estimated solar radiation, travel distance, and travel time may be left unset, and the target travel speed and mode may be set to the most recently set conditions, or the mode may be set to match the mode for the day. Furthermore, all of the conditions may be predetermined conditions.

[0030] FIG. 9 is a flowchart illustrating an example of the sunbathing condition route display process S200. FIG. 10 is a diagram illustrating an example in which routes 71 to 73 from a departure point 61 to a destination 62, displayed by the route display unit 404, are displayed together with route information displays 81 to 83, respectively. The sunbathing condition route display process S200 will be described below with reference to FIGS. 9 and 10. As shown in the flowchart in FIG. 9, in the sunbathing condition route display process S200, first, in step S201, multiple route information (e.g., routes 71 to 73 in FIG. 9), which is information on multiple route candidates, is acquired from the information on the departure point, destination, and date and time input in step S102 of FIG. 5. Acquiring the multiple route information can be achieved using a known technique for calculating routes based on map information. Subsequently, in step S202, the solar radiation calculation unit 401 can calculate an estimated route solar radiation, which is the amount of solar radiation received along the route, based on the route from the departure point to the destination calculated based on the map information and at least weather information. Here, the weather information may include a weather forecast for the route based on the input date and time.

[0031] The solar radiation calculation unit 401 may further calculate the path-estimated solar radiation based on solar position information for one day. The solar position information may include the solar altitude and direction at the time based on the input date and time. The solar radiation calculation unit 401 may also calculate the path-estimated solar radiation based on building shape information. The building shape information may include the shape, height, width, depth, etc. In this case, the solar radiation can be calculated in combination with the solar position information, taking into account whether or not a building will cast a shadow. The solar radiation calculation unit 401 can also calculate the path-estimated solar radiation for each of the multiple acquired routes. The building shape information may be information based on map data using satellite photographs (such as Google Earth (trademark)).

[0032] Subsequently, in step S203, the route display unit 404 displays the route together with a route information display showing information related to the recommended solar radiation amount for the calculated estimated solar radiation amount for the route. In FIG. 10, building shadows 65 are shown. However, the solar radiation calculation unit 401 may take building shadows 65 into account when calculating the solar radiation amount for each route, but the building shadows 65 do not have to be taken into account. In the example of the route information display in FIG. 10, the "sleep improvement mode" is shown as an example of a selected mode. The route information displays 81-83 show the amount of solar radiation received when each of the routes 71-73 is selected, along with the travel time when traveling at a specified travel speed, based on the recommended solar radiation amount or the remaining recommended solar radiation amount. In this way, the route information display can show whether the recommended solar radiation amount is reached when the estimated solar radiation amount for the route is added to the remaining recommended solar radiation amount. In this case, the route information display can include information on whether the recommended solar radiation amount is reached, such as "recommended" or "insufficient." This allows the user to understand which route to take to the destination will allow the user to reach the recommended amount of solar radiation or keep the amount of solar radiation within the recommended amount. The route information display may be a specific numerical value, such as a measurement value (e.g., in Wh) predicted by the measurement device 5, or may be displayed based on the upper or lower limit of the amount of solar radiation set in the setting item 471. In this way, the user of the terminal device 4 can select a route while understanding the amount of solar radiation that should or can be received. Returning to FIG. 9, once the route is displayed in step S203, the sunbathing condition route display process S200 ends.

[0033] The solar radiation calculation unit 401 can also acquire a current location, which is located along the route, and calculate multiple current location route estimated solar radiation amounts, which are the amounts of solar radiation received along each of multiple routes from the current location to the destination. In this case, the route display unit 404 can display information based on a comparison between the current location route estimated solar radiation amount and the recommended remaining solar radiation amount in the route information display. Fig. 11 is a flowchart showing an example of a current location route display process S300, which is a process in which the solar radiation calculation unit 401 calculates the current location route estimated solar radiation amount and the route display unit 404 displays information based on a comparison between the current location route estimated solar radiation amount and the recommended remaining solar radiation amount. Fig. 12 is a diagram showing an example in which routes 75 and 76 from the current location 63 to the destination 62, displayed by the route display unit 404, are displayed together with the route information display.

[0034] The current location route display processing S300 will be described below with reference to FIGS. 11 and 12. It is assumed here that the user has selected and traveled along route 72 in FIG. 10, and is now at current location 63 in FIG. 12, which is midway along route 72. As shown in the flowchart in FIG. 11, the solar radiation calculation unit 401 acquires information about the current location 63 in step S301. The information about the current location 63 can be acquired, for example, by using a satellite positioning system such as a GPS (Global Positioning System) that uses an antenna built into the terminal device 4. Subsequently, the solar radiation calculation unit 401 updates the value of the remaining recommended solar radiation in step S302. This updates the remaining recommended solar radiation to one that takes into account the amount of solar radiation received on that day on the way to the current location 63, which is a midway point on route 72.

[0035] In step S303, the solar radiation calculation unit 401 acquires multiple route information (e.g., routes 75 and 76 in FIG. 12 ) that is information on multiple route candidates from information on the current location 63, the destination 62, and the current date and time. The details of the process in step S303 can be similar to step S201 in FIG. 9 , except that the departure location 61 and the current date and time are different. In step S304, the solar radiation calculation unit 401 calculates multiple current location route estimated solar radiation amounts, which are the amounts of solar radiation received on each of the multiple routes from the current location 63 to the destination 62, based on the route from the current location to the destination calculated based on map information and at least weather information. The details of the process in step S304 can be similar to step S202 in FIG. 9 , and the current location route estimated solar radiation can also be calculated based on information similar to that of the route estimated solar radiation amount. In step S305, the route display unit 404 displays the route information, along with information based on a comparison between the current location route estimated solar radiation amount and the remaining recommended solar radiation amount. The details of the process in step S305 can be the same as those in step S203 in FIG.

[0036] In the example of the route information display in FIG. 12, the "sleep improvement mode" is shown as an example of selection, and route information displays 85 and 86 are shown along with routes 75 and 76. Here, when continuing travel at the specified travel speed for route 72 in FIG. 10, if the solar radiation calculation unit 401 determines that the calculated solar radiation amount will not reach the recommended solar radiation amount (upper side of route information display 85), the same route may be displayed together with a suggestion to change the travel speed to reach the recommended solar radiation amount (lower side of route information display 85). Also, route 76 shows a route that passes by destination 62 once and returns. When traveling at such a specified travel speed and it is determined that the calculated solar radiation amount will not reach the recommended solar radiation amount, a detour route 76 may be suggested to reach the recommended solar radiation amount.

[0037] 11, the user of the terminal device 4 may arrive at a current location 63 along the route 72, and the calculated amount of solar radiation expected to be received up to the current location 63 may differ from the amount of solar radiation actually received up to the current location 63. Even in such a case, the route information display 85 may display a detour route 76 or change the travel speed even if the route is the same, so that the recommended amount of solar radiation can be reached or approached. In addition, if the upper limit of solar radiation has been reached or is about to be reached, such as in the case of "skin care mode" or when there is excessive solar radiation, a route or travel speed that reduces the amount of solar radiation received may be displayed on the route information display, etc.

[0038] In this way, when the user of the terminal device 4 is at a current location, which is an intermediate point between the departure point and the destination, even if the amount of solar radiation received since leaving the departure point differs from the value estimated by the route-estimated solar radiation, the user can change the route to approach the recommended amount of solar radiation. For example, if the amount of solar radiation received at an intermediate point is less than the estimated value, a detour route can be suggested, or if the amount of solar radiation received is greater than the estimated value, a shortest distance can be suggested, or a suggestion to slow or speed up the travel speed can be suggested. Note that suggestions for detour routes, shortest distances, and slowing or speeding up the travel speed may also be made in the route information display when multiple routes from the initial departure point to the destination are shown, rather than at intermediate points.

[0039] In this way, the route information display may be displayed together with at least one of a route and a suggested walking speed. The route information display may also be a suggested walking time, or may be displayed together with other information about the walking time. The route may be, for example, a recommended route or a route with a longer distance, and either one or both may be displayed. This allows the user to select a detour route or slow down their walking speed if the recommended amount of solar radiation is insufficient. Furthermore, if the amount of UV exposure is determined to be high, the user can reduce the amount of UV exposure by increasing their walking speed. Furthermore, presenting a more realistic recommended route that takes into account both travel time and recommended amount of solar radiation makes it easier for users to use the service.

[0040] In this way, the route information display can display routes with higher or lower estimated solar radiation levels. The route information display may also suggest slowing down the travel speed to increase the estimated solar radiation level, or conversely, suggesting increasing the travel speed to decrease the estimated solar radiation level.

[0041] The solar radiation amount calculation unit 401 acquires multiple routes that satisfy the conditions set by the condition setting unit 405, and calculates the route estimated solar radiation amount for each of the multiple routes. In this way, multiple routes that satisfy the conditions set by the condition setting unit 405 are displayed, so the user can select a route that achieves the recommended solar radiation amount, based on the user's physical strength, constitution, physical condition, walking speed, etc. Note that in order to achieve the recommended solar radiation amount, it is also possible to propose a route that does not satisfy the conditions set by the condition setting unit 405 (for example, the same route but with a different travel speed).

[0042] In the above example, the "sleep improvement mode" is used, but the same processing can be performed when the "bone density enhancement mode" or the "skin care mode" is used. In this case, for example, in the "skin care mode," the route display and route information display can be performed so that the recommended amount of solar radiation is not exceeded.

[0043] FIG. 13 is a diagram illustrating a different example of the functional configuration of the terminal device 4. As shown in this diagram, the terminal device 4 in this example has a solar radiation amount display unit 403, a route display unit 404, and a condition setting unit 405. Functions similar to those related to the solar radiation amount calculation unit 401 and the solar radiation amount acquisition unit 402 shown in FIG. 4 are implemented in the server device 2, the measurement device 5, etc., and the terminal device 4 in FIG. 13 can be configured to realize functions similar to those of the terminal device 4 in FIG. 2 by receiving the results of processing in the server device 2, etc. via the communication network 3. Note that the functions of the solar radiation amount determination system 1 may be implemented by implementing functions not implemented in the terminal device 4 using a device connected wirelessly or via a wire to the communication network 3, etc., instead of the server device 2 and the measurement device 5 shown in FIG. 1.

[0044] In the case of the configuration of the terminal device 4 shown in FIG. 13 , when the recommended amount of solar radiation, which is the amount of solar radiation that the terminal device 4 should or may be exposed to in a day, is greater than the total amount of solar radiation already received in a day, the solar radiation amount display unit 403 can display the difference between the recommended amount of solar radiation and the total amount of solar radiation as the remaining recommended amount of solar radiation, which is the remaining amount of solar radiation. The route display unit 404 may display route information that indicates information about the route from the departure point to the destination calculated based on map information and information about the route estimated amount of solar radiation, which is the amount of solar radiation received on the route calculated at least based on meteorological information, associated with the recommended amount of solar radiation, and may also display the route. As a result, the remaining recommended amount of solar radiation, which is the remaining amount of recommended solar radiation, is displayed, allowing the user to understand the amount of solar radiation that they should or may be exposed to as they go about their day.

[0045] Furthermore, the route display unit 404 can display information based on a comparison between multiple current location route estimated solar radiation amounts, which are the amount of solar radiation received along each of multiple routes from the current location to the destination, and the remaining recommended solar radiation amount, in the route information display. Here, the route estimated solar radiation amount may be based on solar position information and building shape information. Furthermore, there may be multiple routes, and the route information display may include at least one suggestion regarding the route and walking speed. Furthermore, the route information display may also suggest a walking time, or may display the walking time together with other indications. Furthermore, the route may be, for example, a recommended route or a route with a longer distance, and either one or both may be displayed.

[0046] 13 also includes a condition setting unit 405 that sets any one of a range of estimated route solar radiation, a range of travel distance, a range of travel time, and a target travel speed as a condition to be referenced when calculating a route, and the route information display may include the estimated route solar radiation for each of multiple routes that satisfy the condition set by the condition setting unit 405. The condition setting unit 405 may further set a condition for further improvement in any one of sleep improvement, bone density enhancement, and skin care, and the condition for sleep improvement, bone density enhancement, and skin care may be set as a condition for further improvement in at least one of serotonin secretion level, vitamin D synthesis level, and ultraviolet exposure level. The recommended solar radiation level may be a solar radiation level aimed at further improvement in any one of sleep improvement, bone density enhancement, and skin care by taking into account at least one of serotonin secretion level, vitamin D synthesis level, and ultraviolet exposure level.

[0047] 13, the terminal device 4 can perform the same operations and achieve the same effects as those described with reference to the above-mentioned Figures 5 to 11, except that part of the processing is performed by one of the devices in the solar radiation amount grasping system 1. The explanations for these operations will be omitted by referring to the above.

[0048] In the above-described embodiment, processing is performed using the amount of solar radiation using the amount of power generation in watt-hours (Wh), etc. However, processing may also be performed using the solar radiation duration, which is the duration of exposure to a predetermined solar radiation intensity. In this case, the solar radiation duration determining system can be realized as a solar radiation duration determining system 1 in which the terminal device 4 of the solar radiation amount determining system 1 is replaced with a terminal device 48. In the solar radiation duration determining system 1, the solar radiation amount calculation unit 401, the solar radiation amount acquisition unit 402, and the solar radiation amount display unit 403 of the terminal device 4 are replaced with a solar radiation duration calculation unit 481, a solar radiation duration acquisition unit 482, and a solar radiation duration display unit 483, respectively, and can be realized as a terminal device 48 as shown in FIG. 14. Here, the terminal device 48 can operate as part of the solar radiation duration determining system. The route display unit 404 and the condition setting unit 405 have the same configuration and can perform the same processing as those of the terminal device 4, so description thereof will be omitted. The insolation duration calculation unit 481, the insolation duration acquisition unit 482, and the insolation duration display unit 483 perform the same processing as that performed by the insolation amount calculation unit 401, the insolation amount acquisition unit 402, and the insolation amount display unit 403 with the insolation amount, but with the insolation duration instead. Therefore, the diagrams shown in Figures 5 to 12 can be explained using the above explanation as flowcharts and screens with the insolation amount replaced with the insolation duration.

[0049] Here, the recommended sunshine duration corresponding to the recommended amount of sunshine is the duration of sunshine that should or may be received on that day, and can be calculated by the sunshine duration calculation unit 481. The total sunshine duration is the duration of sunshine that has already been received on that day, and can be calculated by the sunshine duration calculation unit 481 based on the duration of sunshine acquired by the sunshine duration acquisition unit 482, for example, via wired or wireless communication from the measurement device 5. The remaining recommended sunshine duration is the difference between the recommended sunshine duration and the total sunshine duration, and if the value of the recommended sunshine duration is greater, it can be calculated and displayed by the sunshine duration display unit 483 as the remaining recommended sunshine duration.

[0050] The sunshine duration calculation unit 481 may also calculate a recommended sunshine duration that will further improve one of sleep improvement, bone density enhancement, and skin care. The recommended sunshine duration for sleep improvement, bone density enhancement, and skin care may be calculated taking into account at least one of serotonin secretion, vitamin D synthesis, and UV exposure. The sunshine duration calculation unit 481 may also calculate a path-estimated sunshine duration based on daily solar position information. The solar position information may include the solar altitude and direction at the time based on the input date and time. The sunshine duration calculation unit 481 may also calculate a path-estimated sunshine duration based on building shape information. The building shape information may include the shape, height, width, depth, and the like. In this case, the sunshine duration may be calculated in combination with the sunshine position information, taking into account whether or not a building will cast a shadow. The sunshine duration calculation unit 481 may also calculate a path-estimated sunshine duration for each of the acquired multiple routes. The building shape information may be information based on map data (such as Google Earth (trademark)) using satellite photographs, for example.

[0051] Furthermore, the insolation duration calculation unit 481 can acquire a current location that is partway along the route, and calculate multiple current location route estimated insolation durations, which are the durations of insolation received along each of multiple routes from the current location to the destination. In this case, the route display unit 404 can display information based on a comparison between the current location route estimated insolation duration and the recommended remaining insolation duration in the route information display. The insolation duration calculation unit 481 can acquire multiple routes that satisfy the conditions set by the condition setting unit 405, and calculate the route estimated insolation duration for each of the multiple routes.

[0052] Furthermore, as shown in FIG. 15, similar to terminal device 4 of FIG. 13, terminal device 48 can be a terminal device 48 having a sunshine duration display unit that displays the difference between the recommended sunshine duration, which is the duration of sunshine that should or may be received in a day, as the remaining recommended sunshine duration, which is the remaining recommended sunshine duration, when the recommended sunshine duration, which is the duration of sunshine that should or may be received in a day, is greater than the total sunshine duration already received in a day.

[0053] In the above embodiment, the user is described as a person, but the user may also be an animal.

[0054] The operational flows and operational examples in the above-described embodiments do not necessarily have to be executed in chronological order according to the order depicted in the flow diagrams or sequence diagrams. For example, steps in the operations may be executed in an order different from that depicted in the flow diagrams or sequence diagrams, or may be executed in parallel. Some steps in the operations may be deleted, or additional steps may be added to the processing. The operational flows and operational examples in the above-described embodiments may be executed independently, or two or more operational flows and operational examples may be combined and executed. For example, some steps in one operational flow may be added to another operational flow, or some steps in one operational flow may be replaced with some steps in another operational flow.

[0055] A program may be provided that causes a computer to execute the operations according to the above-described embodiments. The program may be recorded on a computer-readable medium. The computer-readable medium can be used to install the program on a computer. Here, the computer-readable medium on which the program is recorded may be a non-transitory recording medium. The non-transitory recording medium is not particularly limited, and may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

[0056] As used in this disclosure, the terms "based on" and "depending on" do not mean "based only on" or "depending only on," unless expressly stated otherwise. The term "based on" means both "based only on" and "based at least in part on." Similarly, the term "depending on" means both "depending only on" and "depending at least in part on." Furthermore, the terms "include," "comprise," and variations thereof do not mean including only the listed items, but may include only the listed items, or may include additional items in addition to the listed items. Furthermore, the term "or" as used in this disclosure is not intended to mean an exclusive or. In this disclosure, when articles are added by translation, such as a, an, and the in English, these articles are intended to include the plural unless the context clearly indicates otherwise.

[0057] The above describes the embodiments in detail with reference to the drawings, but the specific configuration is not limited to that described above, and various design changes can be made within the scope that does not deviate from the gist of the invention.

[0058] The following additional notes are about the features of the above-described embodiment.

[0059] (Appendix 1) a solar radiation amount acquisition unit (402) that acquires the measured solar radiation amount; a solar radiation amount calculation unit (401) that calculates a recommended amount of solar radiation, which is the amount of solar radiation that should or may be received in a day, and calculates a total amount of solar radiation that has already been received in the day based on the amount of solar radiation acquired by the solar radiation amount acquisition unit; a solar radiation amount display unit (403) that compares the recommended solar radiation amount with the total solar radiation amount, and if the value of the recommended solar radiation amount is greater, displays the difference between the recommended solar radiation amount and the total solar radiation amount as the remaining recommended solar radiation amount.

[0060] (Appendix 2) The device further includes a route display unit (404) that acquires and displays information about a route from a departure point to a destination calculated based on map information, the solar radiation amount calculation unit calculates an estimated route solar radiation amount, which is an amount of solar radiation received along the route, based on at least meteorological information; The solar radiation amount grasping system according to claim 1, wherein the route display unit displays route information that indicates, together with the route, information related to the recommended solar radiation amount for the route estimated solar radiation amount.

[0061] (Appendix 3) the solar radiation amount calculation unit acquires a current location that is midway along the route, and calculates a plurality of current location route estimated solar radiation amounts that are solar radiation amounts received along each of a plurality of routes from the current location to the destination; The solar radiation amount grasping system according to claim 2, wherein the route display unit displays information based on a comparison between the current location route estimated solar radiation amount and the remaining recommended solar radiation amount in the route information display.

[0062] (Appendix 4) 4. The solar radiation amount grasping system according to claim 2, wherein the solar radiation amount calculation unit further calculates the path estimated solar radiation amount based on the solar position information and building shape information for the day.

[0063] (Appendix 5) the solar radiation calculation unit calculates the path estimated solar radiation amount for each of the plurality of paths; 5. The solar radiation amount grasping system according to any one of appendices 2 to 4, wherein the route information display is displayed together with at least one of suggestions for route, walking speed, and walking time.

[0064] (Appendix 6) a condition setting unit (405) that sets any one of a range of the estimated solar radiation amount for the route, a range of a travel distance, a range of a travel time, and a guideline for a travel speed as a condition to be referred to when calculating the route; The solar radiation amount calculation unit acquires a plurality of routes that satisfy the conditions set by the condition setting unit, and calculates the path estimated solar radiation amount for each of the plurality of routes.

[0065] (Appendix 7) the condition setting unit further sets a condition for further improvement in any one of sleep improvement, bone density enhancement, and skin care; The solar radiation monitoring system described in Appendix 6, wherein the conditions related to sleep improvement, bone density enhancement, and skin care are set as conditions that further improve at least one of serotonin secretion, vitamin D synthesis, and ultraviolet exposure.

[0066] (Appendix 8) the solar radiation amount calculation unit calculates the recommended solar radiation amount that will further improve any one of sleep improvement, bone density enhancement, and skin care; The solar radiation amount assessment system according to any one of appendices 1 to 7, wherein the recommended solar radiation amounts for the sleep improvement, bone density enhancement, and skin care are calculated taking into account at least one of serotonin secretion amount, vitamin D synthesis amount, and ultraviolet exposure amount.

[0067] (Appendix 9) A terminal device is provided with a solar radiation amount display unit that, when a recommended solar radiation amount, which is the amount of solar radiation that should or may be received in a day, is greater than the total amount of solar radiation already received in the day, displays the difference between the recommended solar radiation amount and the total amount of solar radiation as the remaining recommended solar radiation amount, which is the remaining amount of recommended solar radiation.

[0068] (Appendix 10) The terminal device described in Appendix 9 displays route information showing information about a route from a departure point to a destination calculated based on map information, and information about an estimated route solar radiation amount, which is the amount of solar radiation received on the route calculated based on at least weather information, associated with the recommended solar radiation amount, and further includes a route display unit that displays the route.

[0069] (Appendix 11) The terminal device described in Appendix 10, wherein the route display unit displays information in the route information display based on a comparison between a plurality of current location route estimated solar radiation amounts, which are the amount of solar radiation received on each of a plurality of routes from a current location, which is partway along the route, to the destination, and the remaining recommended solar radiation amount.

[0070] (Appendix 12) The terminal device according to claim 10 or 11, wherein the path-estimated solar radiation amount is based on solar position information and building shape information.

[0071] (Appendix 13) 13. The terminal device according to any one of claims 10 to 12, wherein the route is plural, and the route information display includes at least one of suggestions for route, walking speed, and walking time.

[0072] (Appendix 14) a condition setting unit that sets any one of a range of the estimated solar radiation amount for the route, a range of a travel distance, a range of a travel time, and a guideline for a travel speed as a condition to be referred to when calculating the route; The terminal device according to any one of appendices 10 to 13, wherein the route information display includes the route estimated solar radiation amount for each of a plurality of the routes that satisfy the conditions set by the condition setting unit.

[0073] (Appendix 15) the condition setting unit further sets a condition for further improvement in any one of sleep improvement, bone density enhancement, and skin care; The terminal device described in Appendix 14, wherein the conditions related to sleep improvement, bone density enhancement, and skin care are set as conditions that further improve at least one of serotonin secretion, vitamin D synthesis, and ultraviolet exposure.

[0074] (Appendix 16) A terminal device described in any one of Appendices 9 to 15, wherein the recommended amount of sunlight is an amount of sunlight that aims to further improve one of the following items: improving sleep, strengthening bone density, or skin care, by taking into consideration at least one of serotonin secretion amount, vitamin D synthesis amount, and ultraviolet exposure amount.

[0075] (Appendix 17) A sunlight grasping program for causing a computer to execute a sunlight display step of displaying the difference between a recommended sunlight amount, which is the amount of sunlight that should or may be received in a day, and the total sunlight amount that has already been received in the day as the remaining recommended sunlight amount, when the recommended sunlight amount is greater than the total sunlight amount that has already been received in the day.

[0076] (Appendix 18) Calculate the recommended amount of solar radiation, which is the amount of solar radiation that should or can be received per day, Obtain the measured amount of solar radiation, Calculating the total amount of solar radiation already received in the day based on the acquired amount of solar radiation; A method for determining solar radiation amount, which compares the recommended solar radiation amount with the total solar radiation amount, and if the value of the recommended solar radiation amount is greater, displays the difference between the recommended solar radiation amount and the total solar radiation amount as the remaining recommended solar radiation amount. [Explanation of symbols]

[0077] 1. Solar radiation monitoring system 2. Server device 3. Communication Network 4 Terminal Devices 41 CPU 42 Volatile memory unit 43 Non-volatile memory unit 44 Communications Department 45 Location information acquisition section 46 Input section 47 Output section 5. Measuring equipment 51 CPU 52 Volatile memory unit 53 Non-volatile memory unit 54 Communications Department 55 Sensor section 401 Solar radiation calculation section 402 Solar radiation acquisition section 403 Solar radiation display unit 404 Route display section 405 Condition setting section

Claims

1. A solar radiation amount grasping system, a solar radiation amount acquisition unit that acquires the measured solar radiation amount; a solar radiation amount calculation unit that calculates a recommended amount of solar radiation, which is the amount of solar radiation that a user of the solar radiation amount grasping system should or may be exposed to in a day, and calculates a total amount of solar radiation that the user has already been exposed to in a day based on the amount of solar radiation acquired by the solar radiation amount acquisition unit; A solar radiation amount grasping system comprising: a solar radiation amount display unit that compares the recommended solar radiation amount with the total solar radiation amount, and if the value of the recommended solar radiation amount is greater, displays the difference between the recommended solar radiation amount and the total solar radiation amount as the remaining recommended solar radiation amount.

2. a route display unit that acquires and displays information about a route from a departure point to a destination calculated based on map information; the solar radiation amount calculation unit calculates an estimated route solar radiation amount, which is an amount of solar radiation received along the route, based on at least meteorological information; The solar radiation amount grasping system according to claim 1 , wherein the route display unit displays route information indicating, together with the route, information related to the recommended solar radiation amount for the route-estimated solar radiation amount.

3. the solar radiation amount calculation unit acquires a current location that is midway along the route, and calculates a plurality of current location route estimated solar radiation amounts that are solar radiation amounts received along each of a plurality of routes from the current location to the destination; The solar radiation amount grasping system according to claim 2 , wherein the route display unit displays information based on a comparison between the estimated solar radiation amount for the current location route and the recommended remaining solar radiation amount in the route information display.

4. The solar radiation amount grasping system according to claim 2 , wherein the solar radiation amount calculation unit further calculates the path-estimated solar radiation amount based on the solar position information and building shape information for the day.

5. the solar radiation calculation unit calculates the path estimated solar radiation amount for each of the plurality of paths; The solar radiation amount monitoring system according to claim 2 , wherein the route information display is displayed together with at least one of suggestions for a route, a walking speed, and a walking time.

6. a condition setting unit that sets any one of a range of the estimated solar radiation amount for the route, a range of a travel distance, a range of a travel time, and a guideline for a travel speed as a condition to be referred to when calculating the route; The solar radiation amount grasping system according to claim 2 , wherein the solar radiation amount calculation unit acquires a plurality of the routes that satisfy the conditions set by the condition setting unit, and calculates the route estimated solar radiation amount for each of the plurality of routes.

7. the condition setting unit further sets a condition for further improvement in any one of sleep improvement, bone density enhancement, and skin care; The solar radiation amount monitoring system according to claim 6, wherein the conditions relating to the sleep improvement, the bone density enhancement, and the skin care are set as conditions that further improve at least one of serotonin secretion, vitamin D synthesis, and ultraviolet exposure.

8. the solar radiation amount calculation unit calculates the recommended solar radiation amount that will further improve any one of sleep improvement, bone density enhancement, and skin care; 2. The solar radiation amount grasping system according to claim 1, wherein the recommended solar radiation amounts for the sleep improvement, bone density enhancement, and skin care are calculated taking into consideration at least one of serotonin secretion amount, vitamin D synthesis amount, and ultraviolet exposure amount.

9. A terminal device is provided with a solar radiation amount display unit that, when a recommended solar radiation amount, which is the amount of solar radiation that should or may be received in a day, is greater than the total amount of solar radiation already received in the day, displays the difference between the recommended solar radiation amount and the total amount of solar radiation as the remaining recommended solar radiation amount, which is the remaining amount of recommended solar radiation.

10. 10. The terminal device according to claim 9, further comprising a route display unit that displays route information showing information about a route from a departure point to a destination calculated based on map information, and information about an estimated route solar radiation amount, which is the amount of solar radiation received along the route calculated based on at least weather information, associated with the recommended solar radiation amount, and that displays the route.

11. The terminal device according to claim 10, wherein the route display unit displays information based on a comparison of a plurality of current location route estimated solar radiation amounts, which are the amount of solar radiation received on each of a plurality of routes from a current location, which is partway along the route, to the destination, with the remaining recommended solar radiation amount in the route information display.

12. The terminal device according to claim 10 , wherein the path-estimated solar radiation amount is based on solar position information and building shape information.

13. The terminal device according to claim 10 , wherein the route is a plurality of routes, and the route information display includes at least one of suggestions for a route, a walking speed, and a walking time.

14. a condition setting unit that sets any one of a range of the estimated solar radiation amount for the route, a range of a travel distance, a range of a travel time, and a guideline for a travel speed as a condition to be referred to when calculating the route; The terminal device according to claim 10 , wherein the route information display includes the route estimated amount of solar radiation for each of the plurality of routes that satisfy the condition set by the condition setting unit.

15. the condition setting unit further sets a condition for further improvement in any one of sleep improvement, bone density enhancement, and skin care; The terminal device according to claim 14 , wherein the conditions relating to the sleep improvement, the bone density enhancement, and the skin care are set as conditions for further improving at least one of an amount of serotonin secretion, an amount of vitamin D synthesis, and an amount of ultraviolet light exposure.

16. The terminal device according to claim 9, wherein the recommended amount of solar radiation is an amount of solar radiation intended to further improve one of sleep improvement, bone density enhancement, or skin care by taking into consideration at least one of serotonin secretion amount, vitamin D synthesis amount, and ultraviolet exposure amount.

17. A sunlight grasping program for causing a computer to execute a sunlight display step of displaying the difference between a recommended sunlight amount, which is the amount of sunlight that should or may be received in a day, and the total sunlight amount that has already been received in the day as the remaining recommended sunlight amount, when the recommended sunlight amount is greater than the total sunlight amount that has already been received in the day.

18. Calculate the recommended amount of solar radiation, which is the amount of solar radiation that should or can be received per day, Obtain the measured amount of solar radiation, Calculating the total amount of solar radiation already received in the day based on the acquired amount of solar radiation; A method for determining solar radiation amount, which compares the recommended solar radiation amount with the total solar radiation amount, and if the value of the recommended solar radiation amount is greater, displays the difference between the recommended solar radiation amount and the total solar radiation amount as the remaining recommended solar radiation amount.

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