UV absorption measurement sheet, UV absorption measurement system, and UV absorption measurement method

Abstract

This invention provides a UV absorption measurement sheet, a UV absorption measurement system, and a UV absorption measurement method for more accurately measuring the amount of UV absorbed. [Solution] The UV absorption amount measuring sheet 1 comprises a stretchable film 2 and an adhesive layer 3 laminated on the stretchable film 2, and either the stretchable film 2 or the adhesive layer 3 contains an ink that changes color when it absorbs ultraviolet light. The UV absorption amount measuring sheet 1 is photographed while in use to acquire image data, and the amount of ultraviolet light absorbed by the UV absorption amount measuring sheet is predicted based on the acquired image data.

Description

Technical Field

[0001] The present invention relates to an ultraviolet absorption amount measurement sheet, an ultraviolet absorption amount measurement system, and an ultraviolet absorption amount measurement method.

Background Art

[0002] For example, sunscreen is used to suppress damage to the skin caused by ultraviolet rays. On the other hand, although the amount of ultraviolet rays irradiating the skin varies depending on time and location, sunscreen is not used according to the amount of ultraviolet rays absorbed because the amount of ultraviolet rays absorbed by the skin is not measured.

[0003] Patent Document 1 discloses a skin patch sheet provided with a patch portion that is used by being attached to the skin, and the patch portion is a fiber sheet including a discoloration layer that discolors by exposure to ultraviolet rays. It is described that the discoloration layer of this skin patch sheet contains fibers, the fibers contain a photochromic compound, and when the patch portion is attached to the skin, exposure to ultraviolet rays is detected by a change in the color of the discoloration layer.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, although Patent Document 1 describes detecting the amount of ultraviolet exposure by a change in the color of the discoloration layer, as a result, it is difficult to determine how much ultraviolet rays have been received.

[0006] The present invention has been made in view of the above circumstances, and aims to provide an ultraviolet absorption amount measuring sheet, an ultraviolet absorption amount measuring system, and an ultraviolet absorption amount measuring method for more accurately measuring the amount of ultraviolet light absorbed. [Means for solving the problem]

[0007] To solve the above problems, a first aspect of the present invention is an ultraviolet absorption amount measuring sheet comprising a stretchable film and an adhesive layer laminated on the stretchable film, wherein either the stretchable film or the adhesive layer contains an ink that changes color by absorbing ultraviolet light, wherein the ultraviolet absorption amount measuring sheet is photographed while in use to acquire image data, and the amount of ultraviolet absorption in the ultraviolet absorption amount measuring sheet is predicted based on the acquired image data.

[0008] A second aspect of the present invention is an ultraviolet absorption amount measuring sheet according to the first aspect, comprising: a second stretchable film laminated on the surface of the adhesive layer opposite to the stretchable film; and a second adhesive layer laminated on the surface of the second stretchable film opposite to the adhesive layer, wherein the second stretchable film contains an ultraviolet absorber.

[0009] A third aspect of the present invention is an ultraviolet absorption amount measuring sheet according to the first aspect, comprising: a second stretchable film laminated on the surface of the adhesive layer opposite to the stretchable film; and a second adhesive layer laminated on the surface of the second stretchable film opposite to the adhesive layer, wherein the second adhesive layer contains an ultraviolet absorber.

[0010] A fourth aspect of the present invention is an ultraviolet absorption amount measuring sheet according to the first aspect, wherein the adhesive layer is formed from a first layer and a second layer laminated on the surface of the stretchable film, and the second layer, which is in contact with the surface of the first layer opposite to the stretchable film, contains an ultraviolet absorber.

[0011] A fifth aspect of the present invention is an ultraviolet absorption amount measuring system for measuring ultraviolet absorption using an ultraviolet absorption amount measuring sheet comprising an expandable film and an adhesive layer laminated on the expandable film, wherein either the expandable film or the adhesive layer contains an ink that changes color by absorbing ultraviolet light, the system comprising: an input unit for inputting the ID and application time of the ultraviolet absorption amount measuring sheet; an image acquisition unit for photographing the ultraviolet absorption amount measuring sheet in use and acquiring image data; a calculation unit for calculating an estimated time to reach a preset ultraviolet absorption amount on the ultraviolet absorption amount measuring sheet based on the application time, the image acquisition time for acquiring the image data, and the image data; and a display unit for notifying the estimated time.

[0012] A sixth aspect of the present invention is an ultraviolet absorption amount measurement system according to the fifth aspect, comprising a storage unit that stores correlation data created from the correlation between the color information of the image data of the ultraviolet absorption amount measurement sheet and the amount of ultraviolet absorption, wherein the calculation unit calculates the amount of ultraviolet absorption of the ultraviolet absorption amount measurement sheet at the image acquisition time using the color information of the acquired image data and the correlation data, and calculates the ultraviolet absorption time of the ultraviolet absorption amount measurement sheet from the application time and the image acquisition time, and then calculates the predicted time from the amount of ultraviolet absorption and the ultraviolet absorption time.

[0013] A seventh aspect of the present invention is the ultraviolet absorption amount measurement system according to the sixth aspect, comprising a reading unit that reads the correlation data from the storage unit, wherein the reading unit reads the correlation data corresponding to the ID of the input ultraviolet absorption amount measurement sheet from the storage unit.

[0014] An eighth aspect of the present invention is a method for measuring ultraviolet absorption using an ultraviolet absorption measuring sheet having an expandable film and an adhesive layer laminated on the expandable film and containing an ink that changes color when it absorbs ultraviolet light, comprising: attaching the ultraviolet absorption measuring sheet to an object and inputting the ID of the ultraviolet absorption measuring sheet into a terminal device; then photographing the ultraviolet absorption measuring sheet in use with the terminal; storing the ID, the time of attachment when the ID was input, the image data of the photographed ultraviolet absorption measuring sheet, and the image acquisition time when the image data was acquired in a storage unit; calculating an estimated time to reach a preset ultraviolet absorption amount on the ultraviolet absorption measuring sheet based on the attachment time, the image acquisition time, and the image data; and notifying the estimated time.

[0015] A ninth aspect of the present invention is a method for measuring ultraviolet absorption according to the eighth aspect, comprising storing correlation data created from the correlation between the color information of the image data of the ultraviolet absorption measurement sheet and the amount of ultraviolet absorption in a storage unit, wherein the calculation step includes: using the color information of the acquired image data and the correlation data to calculate the amount of ultraviolet absorption of the ultraviolet absorption measurement sheet at the image acquisition time; calculating the ultraviolet absorption time of the ultraviolet absorption measurement sheet from the application time and the image acquisition time; and then calculating the predicted time from the amount of ultraviolet absorption and the ultraviolet absorption time.

[0016] A tenth aspect of the present invention is a method for measuring ultraviolet absorption according to the ninth aspect, wherein the calculation step includes reading correlation data corresponding to the ID from the storage unit when the ultraviolet absorption measurement sheet is photographed by the terminal. [Effects of the Invention]

[0017] According to the present invention, it is possible to obtain an ultraviolet absorption measurement sheet, an ultraviolet absorption measurement system, and an ultraviolet absorption measurement method for more accurately measuring the amount of ultraviolet light absorbed.

Brief Description of Drawings

[0018] [Figure 1] It is a schematic diagram showing an example of use of an ultraviolet absorption amount measurement sheet according to an embodiment of the present invention. [Figure 2] It is a schematic cross-sectional view of an ultraviolet absorption amount measurement sheet according to an embodiment of the present invention. [Figure 3] It is a schematic cross-sectional view of a modified example of the ultraviolet absorption amount measurement sheet of the present invention. [Figure 4] It is a schematic cross-sectional view of a modified example of the ultraviolet absorption amount measurement sheet of the present invention. [Figure 5] It is a schematic cross-sectional view of a modified example of the ultraviolet absorption amount measurement sheet of the present invention. [Figure 6] It is a schematic diagram of an input screen of a terminal device when measuring the ultraviolet absorption amount using the ultraviolet absorption amount measurement sheet according to an embodiment of the present invention. [Figure 7] It is a schematic diagram of an output screen of a terminal device of a measurement result of measuring the ultraviolet absorption amount using the ultraviolet absorption amount measurement sheet according to an embodiment of the present invention. [Figure 8] It is a block diagram of an ultraviolet absorption amount measurement system using the ultraviolet absorption amount measurement sheet according to an embodiment of the present invention. [Figure 9] It is a flowchart showing an ultraviolet absorption amount measurement method using the ultraviolet absorption amount measurement sheet according to an embodiment of the present invention. [Figure 10] It is a flowchart showing a part of the ultraviolet absorption amount measurement method using the ultraviolet absorption amount measurement sheet according to an embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0019] The following describes in detail embodiments for carrying out the present invention (hereinafter simply referred to as "this embodiment"). This embodiment is illustrative for explaining the present invention and is not intended to limit the present invention to the following content. The present invention can be carried out by modifying it as appropriate within the scope of its gist. In the drawings, the same reference numerals are used for the same elements, and redundant explanations are omitted. Also, unless otherwise specified, positional relationships such as up, down, left, and right are based on the positional relationships shown in the drawings. Furthermore, the dimensional ratios in the drawings are not limited to the ratios shown.

[0020] An ultraviolet absorption measurement sheet according to one embodiment of the present invention will be described with reference to Figures 1 and 2. Figure 1 is a schematic diagram showing an example of use of the ultraviolet absorption measurement sheet according to one embodiment of the present invention. Figure 2 is a schematic cross-sectional view of the ultraviolet absorption measurement sheet according to one embodiment of the present invention.

[0021] <UV Absorption Measurement Sheet> The ultraviolet absorption amount measuring sheet 1 of this embodiment comprises a stretchable film 2 and an adhesive layer 3 laminated on the stretchable film 2. In this embodiment, as shown in Figure 2, the adhesive layer 3 is configured to contain an ink I that changes color when exposed to ultraviolet light. Note that the ink I may be contained in the stretchable film 2 instead of the adhesive layer 3. Also, in Figure 2, the Z direction indicates the thickness direction of the ultraviolet absorption amount measuring sheet 1, and the X direction indicates the width direction. The object and the ultraviolet absorption amount measuring sheet 1 are attached on the negative Z side.

[0022] When the UV absorption measurement sheet 1 is attached to a fingernail, the ink I contained in the adhesive layer 3 changes color when UV light is shone on the UV absorption measurement sheet 1, as shown in Figure 1(b), allowing for real-time recognition of UV light reception.

[0023] (Stretchable film) The stretchable film 2 can be any known material as long as it has water resistance and flexibility and can conform to the shape of the object. For example, it is preferable that the material be a polyurethane film or a polyolefin film, which has excellent stretchability and flexibility. If the stretchable film 2 does not contain ink I, it is preferable that the stretchable film 2 itself be transparent so that discoloration can be easily observed. Among these, polyurethane film is particularly preferred from the viewpoint of adhesion with the adhesive layer.

[0024] The stretchable film 2 is typically in the range of 2 to 200 μm, and from the viewpoint of ease of handling, is preferably in the range of 5 to 150 μm, and more preferably in the range of 10 to 100 μm.

[0025] (Adhesive layer) The adhesive layer 3 is formed from an acrylic emulsion-type adhesive or a solution-type adhesive, such as an acrylic emulsion-type adhesive or a solution-type adhesive, which consists of ethylenically unsaturated carboxylic acids or esters such as (meth)acrylate or (meth)acrylic acid, and is suitable for use on the human body.

[0026] There are no particular restrictions on the thickness of the adhesive layer, but it is usually selected in the range of 5 to 100 μm, preferably in the range of 10 to 60 μm.

[0027] By using the adhesive layer 3 described above, a UV absorption measurement sheet 1 that is less likely to peel off and is easy to use can be obtained.

[0028] (Release paper) For storage purposes, a release liner (not shown) may be laminated on the adhesive layer 3 of the UV absorption measurement sheet 1 on the surface opposite to the stretchable film 2. The release liner can be peeled off and used when attaching the UV absorption measurement sheet 1 to an object.

[0029] (Ink) In this embodiment, ink I, which changes color upon absorbing ultraviolet light, is a material that can be included in the adhesive layer 3. Examples of inks that change color upon exposure to ultraviolet light include inks containing ultraviolet-reactive compounds, specifically, inks that change color in response to ultraviolet light, commonly referred to as photochromic inks. Dyes that change color reversibly or irreversibly upon exposure to ultraviolet light may also be used.

[0030] Examples of dyes include basic dyes such as malachide green and crystal violet lactone. When using photochromic inks, examples of UV-reactive compounds included in photochromic inks include azobenzene dyes, Schiff bases, spiropyran dyes, tetrachloroketodihydronaphthalene, triphenylimidazoyl, thiaidine compounds, pyologen compounds, or several organic compounds with color-changing mechanisms such as fulgides, spirooxazine compounds, chromenes, bipyridine compounds, diarylethenes, fulgides, hexaarylbisimidazole (HABI) compounds, spirooxazine compounds, spiropyran compounds, chromene compounds or their derivatives. UV-reactive compounds may be used individually or in any combination and ratio of two or more. Commercially available products can also be used.

[0031] While there are no particular restrictions on the ink content, it is preferable that it be 0.1% by weight or more, and more preferably 1% by weight or more, from the viewpoint of making the color change due to ultraviolet irradiation more apparent. Furthermore, there is no particular need to set an upper limit; it may be 100% by weight or less, 80% by weight or less, or 50% by weight or less.

[0032] Ink I may contain the same type of ink across the entire surface of the adhesive layer 3, or it may contain different inks in parts. When different inks are used in parts, patterns such as marks may appear when ultraviolet light is absorbed. Figure 1(b) shows an ultraviolet absorption measurement sheet in the state of ultraviolet light absorption, and as shown in the figure, it is possible to make highly decorative designs such as hearts or stars appear.

[0033] (How to use) First, take the UV absorption measurement sheet 1 and peel off the release paper. Then, as shown in Figure 1(a), for example, attach the UV absorption measurement sheet 1 along the shape of the nail. Although this example shows the UV absorption measurement sheet 1 being attached to a nail, it can be attached to any object that is exposed to ultraviolet light, such as skin on the arm, clothing, hats, bags, accessories, straps, keychains, smartphone cases, and various other objects. From the standpoint of preventing sunburn marks, it is preferable to attach it to an object other than skin.

[0034] Next, when ultraviolet light is irradiated and the design clearly appears on the ultraviolet absorption measurement sheet 1 as shown in Figure 1(b), it indicates that a predetermined amount of ultraviolet light has been irradiated, so for example, reapply sunscreen.

[0035] In this embodiment, a configuration is shown in which a design appears on the ultraviolet absorption amount measurement sheet 1 when irradiated with ultraviolet light. However, the embodiment is not limited to this, and other configurations such as simply a change in the color of the whole or a part of it are also acceptable.

[0036] Furthermore, as described later, image data of the ultraviolet absorption amount measurement sheet 1 may be acquired using a terminal device equipped with an imaging device such as a smartphone, and the amount of ultraviolet absorption in the ultraviolet absorption amount measurement sheet 1 may be predicted based on the acquired image data.

[0037] (Variation of UV absorption measurement sheet) Next, a modified example of the UV absorption amount measurement sheet 1 will be described. Components similar to those in UV absorption amount measurement sheet 1 are denoted by the same reference numerals and their descriptions are omitted. Figures 3 to 5 are schematic cross-sectional views of modified examples of the UV absorption amount measurement sheet 1 of the present invention.

[0038] The UV absorption measurement sheet 11 shown in Figure 3 is constructed by laminating a second stretchable film 4 containing a UV absorber U and a second adhesive layer 5 in that order on the side of the adhesive layer 3 of the UV absorption measurement sheet 1. That is, it comprises a second stretchable film 4 laminated on the surface of the adhesive layer 3 opposite to the stretchable film 2, and a second adhesive layer 5 laminated on the surface of the second stretchable film 4 opposite to the adhesive layer 3, with the second stretchable film 4 containing the UV absorber U. In this modified example, since the second stretchable film 4 contains the UV absorber U, it can prevent sunburn marks even when applied to, for example, nails or skin.

[0039] The UV absorption measurement sheet 12 shown in Figure 4 is constructed by laminating a second stretchable film 6 and a second adhesive layer 7 containing a UV absorber U in that order on the side of the adhesive layer 3 of the UV absorption measurement sheet 1. Specifically, it comprises a second stretchable film 6 laminated on the surface of the adhesive layer 3 opposite to the stretchable film 2, and a second adhesive layer 7 laminated on the surface of the second stretchable film 4 opposite to the adhesive layer 3, with the second adhesive layer 7 containing the UV absorber U. In this modified example, since the second adhesive layer 7 contains the UV absorber U, it can prevent sunburn marks even when applied to, for example, nails or skin.

[0040] In the above modifications, it is preferable that the second stretchable films 4 and 6 are achromatic films such as white or black, as this is less affected by the color of the object, such as nails or skin, and clearly indicates the color development of the ink I. In this case, the second stretchable films 4 and 6 serve as a base for the adhesive layer 3 containing the ink I. Therefore, by selecting the color of the second stretchable films 4 and 6 according to the type of ink I contained in the adhesive layer 3, it becomes possible to stably observe the color development of the ultraviolet absorption measurement sheets 11 and 12.

[0041] The UV absorption measurement sheet 13 shown in Figure 5 has a second adhesive layer 7 (second adhesive layer) containing UV absorber U laminated to the adhesive layer 3 (first adhesive layer) of the UV absorption measurement sheet 1. In this modified example, since the second adhesive layer 7 contains UV absorber U, it can prevent sunburn marks even when applied to, for example, nails or skin.

[0042] <UV Absorption Measurement System> As shown in Figure 8, the ultraviolet absorption amount measurement system 10 of this embodiment comprises a terminal device 20, a network 30, and a control device 40. The ultraviolet absorption amount measurement system 10 includes an input unit 21, an image acquisition unit 22, a display unit 23, and a communication unit 24 within the terminal device 20. The control device 40 includes a transmitting / receiving unit 41, a storage unit 42, a reading unit 43, and a calculation unit 44. Data acquired by the input unit 21 and the image acquisition unit 22 of the terminal device 20 is received by the transmitting / receiving unit 41 of the control device 40 via the network 30 from the communication unit 24 and stored in the storage unit 42.

[0043] In this embodiment, the terminal device 20 and the control device 40 are provided separately, and the communication unit 24 of the terminal device 20 and the transmitting / receiving unit 41 of the control device 40 are connected by a network 30. However, the configuration is not limited to this, and the various parts of the control device 40 may be housed within the terminal device 20.

[0044] (Terminal device) As shown in Figures 6 and 7, in this embodiment, the terminal device 20 can be, for example, a smartphone. The terminal device 20 may also be a personal computer or a tablet, as long as it has the above-mentioned components. The terminal device 20 includes an input unit 21, an image acquisition unit 22, a display unit 23, and a communication unit 24.

[0045] In the terminal device 20, the display screen (display unit) 23 shows a new button B1, a measurement button B2, and a change button B3.

[0046] (Input section) The input unit 21 of the terminal device 20 inputs the ID of the ultraviolet absorption measurement sheet 1 and the time of application. In this embodiment, the input unit 21 consists of various buttons that appear on the display screen 23, such as the new button B1, the measurement button B2, and the change button B3, and a touch panel type is used. The input unit 21 may also be in the form of a keyboard or remote control. Figure 6 shows the input screen that appears after pressing the new button B1, and displays the pull-down button IN1 for inputting the ID of the ultraviolet absorption measurement sheet 1, and the time when the new button B1 was pressed as the application time M1.

[0047] When the user attaches the UV absorption measurement sheet 1, they press the new button B1, and then, on the input screen shown in Figure 6, they press the pull-down button IN1 to enter the ID of the UV absorption measurement sheet 1. The ID of the UV absorption measurement sheet 1 is displayed on either the stretchable film 2, the release paper, or the packaging (not shown), and this ID is entered.

[0048] (Image acquisition unit) The image acquisition unit 22 of the terminal device 20 captures image data of the ultraviolet absorption measurement sheet 1 while it is in use. The image acquisition unit 22 can be any imaging device capable of acquiring image data of the ultraviolet absorption measurement sheet 1, and can be any known imaging device such as a digital camera, CCD, CMOS, or infrared camera. In this embodiment, the image acquisition unit 22 is integrally provided with the terminal device 20, but is not necessarily limited to this, and for example, a camera that acquires and transmits image data may be attached to the terminal device 20.

[0049] (Display) In this embodiment, the display unit is the display screen 23 of the terminal device 20. The display screen 23 can display an input screen that appears after pressing the new button B1, as shown in Figure 6, or an output screen that appears after acquiring image data of the ultraviolet absorption amount measurement sheet 1, as shown in Figure 7.

[0050] In the input screen shown in Figure 6, after entering the ID of the UV absorption measurement sheet 1, the image acquisition unit 22, which is the imaging device, is pointed at the UV absorption measurement sheet 1 and the measurement button B2 is pressed. The image acquisition unit 22 then operates and acquires image data of the UV absorption measurement sheet 1. As shown in Figure 7, the acquired image data is displayed as acquired image P1 on the output screen of the display screen 23. If you want to change the image data, you can press the change button B3 to operate the image acquisition unit 22 again and take a new image.

[0051] As shown in Figure 7, the display screen 23, as the output screen, displays the acquired image P1, ID image P2, pasting time, acquisition time, predicted time, UV intensity category, and a message M2 indicating the UV absorption amount. The acquired image P1 is the image acquired by the image acquisition unit 22, and the ID image P2 is a sample image stored for each ID in the storage unit 42 of the control device 40, which will be described later. The acquisition time in message M2 indicates the time when the image data was acquired, specifically the time when the measurement button B2 was pressed. The predicted time means the predicted time when the UV absorption amount preset on the UV absorption amount measurement sheet 1 will be reached. This predicted time is calculated by the calculation unit 44 of the control device 40, which will be described later, and is notified on the display screen 23.

[0052] Furthermore, the UV amount indicates the intensity of UV radiation irradiated onto the UV absorption measurement sheet 1. A high UV amount per unit time (e.g., per minute) is indicated as high, a low UV amount as low, and an intermediate amount as medium. The UV absorption amount indicates the predicted amount of UV absorption that the UV absorption measurement sheet 1 would have absorbed at the time of image acquisition. The methods for calculating the UV amount and UV absorption amount will be described later.

[0053] (Communications Department) The communication unit 24 can use communication equipment capable of sending various data to the transmitting / receiving unit 41 of the control device 40 via the network 30. This data includes data such as the time of attachment and the time of image acquisition obtained from the input unit 21, and image data obtained from the image acquisition unit 22. The various data sent from the communication unit 24 to the transmitting / receiving unit 41 are stored in the storage unit 42 of the control device 40.

[0054] The communication unit 24 also receives the attachment time, image data, image acquisition time, and image data of ID image P2 read from the storage unit 42 of the control device 40 from the control device 20 and displays them on the display device 23. Furthermore, it obtains the amount of ultraviolet light, amount of ultraviolet light absorption, and predicted time calculated by the calculation unit from the control device 20 and displays them on the display device 23.

[0055] The communication equipment constituting the communication unit 24 may include, for example, wired devices such as metal wire cables, as well as wireless devices that transmit radio waves, infrared rays, etc., and known technologies can be used.

[0056] (network) Network 30 connects the terminal device 20 and the control device 40, and relays the exchange of various data between the communication unit 24 of the terminal device 20 and the transmitting / receiving unit 41 of the control device 40. Network 30 can take any form as long as it can exchange data between the terminal device 20 and the control device 40, for example, a LAN, WAN, intranet, or the Internet can be used.

[0057] (Control device) The control device 40 comprises a transmitting / receiving unit 41, a storage unit 42, a reading unit 43, and a calculation unit 44. In this embodiment, it can be placed on a server connected to the terminal device 20 via a network 30. Alternatively, the control device 40 may be placed within the terminal device 20 without being connected via the network 30.

[0058] The control device 40 consists of a CPU (Central Processing Unit), memory, etc., and controls the operation of each part described below by executing a predetermined program.

[0059] (Transmitting / receiving unit) The transmitting / receiving unit 41 of the control device 40 receives various data transmitted from the communication unit 24 of the terminal device 20 via the network 30, and transmits data calculated by the calculation unit 44 and various data read from the storage unit 42 to the communication unit 24 of the terminal device 20. The transmitting / receiving unit 41 may have the same configuration as the communication unit 24 of the terminal device 20.

[0060] (Storage part) The storage unit 42 of the control device 40 stores various data sent from the communication unit 24 of the terminal device 20. Such data includes the time of attachment entered into the input unit 21, the ID of the ultraviolet absorption amount measurement sheet 1, and the image data and image acquisition time acquired by the image acquisition unit 22. The storage unit 42 also has pre-stored ID image data corresponding to the ID of the ultraviolet absorption amount measurement sheet 1.

[0061] Furthermore, the memory unit 42 stores correlation data, which is created in advance from the correlation between the color information of the image data and the amount of ultraviolet absorption, for each ID of the ultraviolet absorption measurement sheet 1. This correlation data can be obtained, for example, by creating a sample for each ID of the ultraviolet absorption measurement sheet 1, irradiating the sample with a certain amount of ultraviolet light, taking images of the sample at predetermined intervals (for example, every minute) to acquire image data, obtaining color information from this image data, and creating a correlation graph from the color information and amount of ultraviolet light for each image data.

[0062] (Readout section) The read unit 43 of the control device 40 reads various data stored in the storage unit 42 and sends the same data from the transmit / receive unit 41 to the communication unit 24 of the terminal device 20, or to the calculation unit 44. The data read from the storage unit 42 and sent to the communication unit 24 of the terminal device 20 includes the attachment time and the image data of the ID image. The data sent to the calculation unit 44 includes the attachment time, correlation data, image data of the acquired image, and the image acquisition time.

[0063] (Calculation section) The calculation unit 44 calculates the estimated time at which the UV absorption amount measurement sheet 1 reaches a preset UV absorption amount, based on the application time, the image acquisition time when the image data was obtained, and the image data itself. The calculation of the estimated time is performed according to the following procedure.

[0064] First, the amount of ultraviolet absorption of the ultraviolet absorption amount measurement sheet 1 at the time of image acquisition is calculated using the color information of the image data read from the memory unit 42 and the correlation data. As described above, the correlation data is data that represents the correlation between the color information of the image data of the ultraviolet absorption amount measurement sheet 1 and the amount of ultraviolet absorption.

[0065] Next, the ultraviolet absorption time of the ultraviolet absorption amount measurement sheet 1 is calculated from the application time and image acquisition time read from the memory unit 42.

[0066] Next, the amount of UV absorption per unit time is calculated from the previously calculated amount of UV absorption and UV absorption time. Then, the difference between the preset amount of UV absorption and the calculated amount of UV absorption is divided by the amount of UV absorption per unit time. In this way, the remaining time until the preset amount of UV absorption is reached is calculated. Adding this remaining time to the image acquisition time allows us to calculate the predicted time.

[0067] The estimated time data obtained as described above is transmitted from the transmitting / receiving unit 41 of the control device 40 to the communication unit 24 of the terminal device 20, and the estimated time is displayed on the display screen 23.

[0068] In the above embodiment, an ultraviolet absorption amount measuring sheet 1 comprising a stretchable film 2 and an adhesive layer 3, and containing an ink that changes color when it absorbs ultraviolet light in either the stretchable film 2 or the adhesive layer 3, is used to acquire image data of the ultraviolet absorption amount measuring sheet 1 in use, and the amount of ultraviolet absorption is predicted based on the acquired image data. Therefore, not only is ultraviolet absorption detected by the color change of the ultraviolet absorption amount measuring sheet 1 possible, but the amount of ultraviolet absorption can also be measured more accurately.

[0069] Furthermore, in a modified version of this embodiment, the ultraviolet absorption measurement sheets 11 and 12 further include a second stretchable film 4 and 6 and a second adhesive layer 5 and 7. By including an ultraviolet absorber in either the second stretchable film 4 or the second adhesive layer 7, sunburn marks can be prevented at the location where the ultraviolet absorption measurement sheets 11 and 12 are attached. In this case, it is preferable to make the second stretchable films 4 and 6 achromatic so that the ultraviolet absorption measurement sheets 11 and 12 are less affected by the color of the object, such as nails or skin, and the color development of the ink I is clearly visible. Therefore, by selecting the color of the second stretchable films 4 and 6 according to the type of ink I contained in the adhesive layer 3, it becomes possible to stably observe the color development of the ultraviolet absorption measurement sheets 11 and 12.

[0070] Furthermore, even if the second stretchable films 4 and 6 are not provided, a second adhesive layer 7 (the second layer of the adhesive layer) can be laminated onto the adhesive layer 3 (the first layer of the adhesive layer), and by including the ultraviolet absorber U in this second adhesive layer 7, sunburn marks can be prevented in the area where the ultraviolet absorption amount measurement sheet 13 is attached.

[0071] Furthermore, in the above embodiment, an ultraviolet absorption measurement system is provided which includes an input unit 21 for inputting the ID of the ultraviolet absorption measurement sheet 1 and the time of application, an image acquisition unit 22 for taking a picture of the ultraviolet absorption measurement sheet 1 in use and acquiring image data, a calculation unit 44 for calculating the estimated time to reach a preset ultraviolet absorption amount on the ultraviolet absorption measurement sheet 1 based on the application time, the image acquisition time, and the image data, and a display unit 23 for notifying the estimated time. With such a system, it is possible to calculate the estimated time until the planned ultraviolet absorption amount is reached more accurately, and for example, sunscreen can be reapplied when the estimated time arrives.

[0072] Furthermore, the UV absorption measurement system 10 is provided, which includes a storage unit 42 that stores correlation data created from the correlation between the color information of the UV absorption measurement sheet 1 image data and the amount of UV absorption, and a calculation unit 44 that uses the acquired image data color information and correlation data to calculate the amount of UV absorption of the UV absorption measurement sheet 1 at the time of image acquisition, and also calculates the UV absorption time of the UV absorption measurement sheet 1 from the application time and the image acquisition time, and then calculates the estimated time to reach a preset amount of UV absorption from the amount of UV absorption and the UV absorption time.As described above, by using the acquired image data color information and correlation data, it becomes possible to measure the amount of UV absorption at the time the image is acquired more accurately. Furthermore, it becomes possible to calculate the estimated time to reach a preset amount of UV absorption more accurately from the amount of UV absorption and the UV absorption time.

[0073] Multiple types of the above-mentioned correlation data are stored in the storage unit 42, and the reading unit 43 reads the correlation data corresponding to the ID of the input ultraviolet absorption amount measurement sheet 1 from the storage unit 42. Therefore, even if the ultraviolet absorption amount measurement sheet 1 consists of multiple types of sheets with different designs and colors, the ultraviolet absorption amount is measured using the correlation data corresponding to each sheet, allowing for more accurate measurement of the ultraviolet absorption amount.

[0074] <Method for measuring UV absorption amount> Next, we will explain how to measure the amount of ultraviolet absorption using the ultraviolet absorption measurement sheet 1 described above, using Figures 9 and 10.

[0075] As shown in Figure 9, first, attach the UV absorption measurement sheet 1 to the fingernail and press the new button B1 displayed on the display screen 23 of the terminal device 20 (attachment step S10). Then, the input screen shown in Figure 6 will be displayed.

[0076] Next, the user presses the IN1 pull-down button on the input screen to display the ID number, and then selects the ID of the attached UV absorption measurement sheet 1 to input the ID into the terminal device 20 (input step S20).

[0077] When an ID is entered, the imaging screen (not shown) is activated, and the measurement button B2 is pressed to take a picture of the UV absorption amount measurement sheet 1 being used with the terminal device 20 (imaging process S30). Once the imaging is complete, the entered ID, the time the UV absorption amount measurement sheet 1 was attached, the acquired image data of the UV absorption amount measurement sheet 1, and the image acquisition time when the image data was acquired are stored in the storage unit 42 (storage process S40).

[0078] Next, the calculation unit 44 calculates the estimated time at which the UV absorption amount measurement sheet 1 reaches a preset UV absorption amount based on the application time, image acquisition time, and image data (calculation step S50).

[0079] Finally, the calculated estimated time data is transmitted to the terminal device 20, and the estimated time is displayed on the display screen 23 and announced (announcement process S60).

[0080] The calculation process S50 will be explained in more detail using Figure 10.

[0081] When the user presses the measurement button B2 on the imaging screen and photographs the ultraviolet absorption amount measurement sheet 1, image data is acquired. This image data, along with the ID data entered by the input unit 21, is transmitted from the communication unit 24 to the transmitting / receiving unit 41 of the control device 40 via the network 30. When the transmitting / receiving unit 41 receives the image data and ID data, the reading unit 43 reads the correlation data corresponding to the received ID from the storage unit 42 (step S51). As described above, correlation data created from the correlation between the color information of the image data of the ultraviolet absorption amount measurement sheet 1 and the amount of ultraviolet absorption is pre-stored in the storage unit 42 for each ID. That is, when the ultraviolet absorption amount measurement sheet 1 is photographed by the terminal device 20, the correlation data corresponding to the ID of the ultraviolet absorption amount measurement sheet 1 is read from the storage unit 42. The storage unit 42 also simultaneously stores the received ID, the time of application, and the image data acquired by the image acquisition unit 22.

[0082] Next, using the color information of the acquired image data and the read-out correlation data, the amount of ultraviolet absorption of the ultraviolet absorption measurement sheet 1 at the time of image acquisition is calculated, and the ultraviolet absorption time of the ultraviolet absorption measurement sheet 1 is calculated from the time of application and the time of image acquisition (step S52).

[0083] Subsequently, for example, using the calculation described above, the estimated time to reach the preset ultraviolet absorption amount on the ultraviolet absorption amount measurement sheet 1 is calculated from the ultraviolet absorption amount and ultraviolet absorption time (step S53).

[0084] In the above embodiment, the UV absorption amount measurement sheet 1 is attached to the object, the ID of the UV absorption amount measurement sheet 1 is input to the terminal device 20, and then the UV absorption amount measurement sheet 1 in use is photographed by the terminal device 20. The ID, the time the UV absorption amount measurement sheet 1 was attached, the acquired image data of the UV absorption amount measurement sheet 1, and the image acquisition time are stored in the storage unit 42. Based on the attachment time, image acquisition time, and image data, the estimated time at which the UV absorption amount measurement sheet 1 will reach a preset UV absorption amount is calculated, and this estimated time is notified. Therefore, it becomes possible to calculate the estimated time until the planned UV absorption amount is reached more accurately, and for example, sunscreen can be reapplied when the estimated time arrives.

[0085] Furthermore, in the above embodiment, correlation data created from the correlation between the color information of the image data of the UV absorption measurement sheet 1 and the amount of UV absorption is stored in the storage unit 42, and the amount of UV absorption of the UV absorption measurement sheet 1 at the time of image acquisition is calculated using the color information of the acquired image data and the correlation data. Then, the UV absorption time of the UV absorption measurement sheet 1 is calculated from the application time and the image acquisition time, and then the estimated time to reach a preset amount of UV absorption is calculated from the amount of UV absorption and the UV absorption time. As described above, by using the color information of the acquired image data and the correlation data, it becomes possible to measure the amount of UV absorption at the time the image is acquired more accurately. Furthermore, it becomes possible to calculate more accurately the estimated time to reach a preset amount of UV absorption from the amount of UV absorption and the UV absorption time.

[0086] Furthermore, in the above embodiment, when the ultraviolet absorption amount measurement sheet 1 is photographed by the terminal device 20, correlation data corresponding to the ID of the ultraviolet absorption amount measurement sheet 1 is read from the storage unit. Therefore, even if the ultraviolet absorption amount measurement sheet 1 is composed of multiple types of sheets with different designs and colors, the ultraviolet absorption amount is measured using the correlation data corresponding to each sheet, thus enabling more accurate measurement of the ultraviolet absorption amount.

[0087] Although the present invention has been described above based on the above embodiments, the present invention is not limited to the contents of the above embodiments, and can naturally be modified as appropriate without departing from the present invention. In other words, all other embodiments, examples, and operational techniques made by those skilled in the art based on these embodiments are of course included in the scope of the present invention. [Explanation of symbols]

[0088] 1, 11, 12, 13 UV absorption measurement sheets 2. Stretchable film 3. Adhesive layer 4. Second stretchable film 5. Second adhesive layer 10. UV Absorption Measurement System 20 Terminal devices 21 Input section 22 Image acquisition unit 23 Display section 24 Communications Department 30 Networks 40 Control device 41 Transmitter / Receiver 42 Storage section 43 Reading section 44 Calculation Section

Claims

1. The device comprises a stretchable film and an adhesive layer laminated onto the stretchable film, An ultraviolet absorption amount measuring sheet containing an ink that changes color by absorbing ultraviolet light in either the stretchable film or the adhesive layer, A UV absorption amount measuring sheet characterized by taking a photograph of the UV absorption amount measuring sheet while it is in use to acquire image data, and predicting the amount of UV absorption in the UV absorption amount measuring sheet based on the acquired image data.

2. A second stretchable film is laminated on the surface of the adhesive layer opposite to the stretchable film, The second stretchable film comprises a second adhesive layer laminated on the surface opposite to the adhesive layer of the second stretchable film, The ultraviolet absorption amount measuring sheet according to claim 1, characterized in that the second stretchable film contains an ultraviolet absorber.

3. A second stretchable film is laminated on the surface of the adhesive layer opposite to the stretchable film, The second stretchable film comprises a second adhesive layer laminated on the surface opposite to the adhesive layer of the second stretchable film, The ultraviolet absorption amount measuring sheet according to claim 1, characterized in that the second adhesive layer contains an ultraviolet absorber.

4. The adhesive layer is formed from a first layer and a second layer laminated on the surface of the stretchable film. The ultraviolet absorption amount measuring sheet according to claim 1, characterized in that the second layer, which is in contact with the surface of the first layer opposite to the stretchable film, contains an ultraviolet absorber.

5. A UV absorption measurement system comprising a stretchable film and an adhesive layer laminated on the stretchable film, wherein the UV absorption amount is measured using a UV absorption measurement sheet containing an ink that changes color when it absorbs ultraviolet light, wherein the amount of UV absorption is measured using a UV absorption measurement sheet, the stretchable film or the adhesive layer. An input unit for inputting the ID and application time of the aforementioned ultraviolet absorption measurement sheet, An image acquisition unit that photographs the UV absorption amount measurement sheet in use and acquires image data, A calculation unit calculates the estimated time at which the UV absorption amount measurement sheet reaches a preset UV absorption amount based on the pasting time, the image acquisition time at which the image data was obtained, and the image data. A system for measuring ultraviolet absorption amount, characterized by including a display unit that notifies the predicted time.

6. The system includes a storage unit that stores correlation data created from the correlation between the color information of the image data of the UV absorption amount measurement sheet and the amount of UV absorption, The ultraviolet absorption amount measurement system according to claim 5, characterized in that the calculation unit calculates the amount of ultraviolet absorption of the ultraviolet absorption amount measurement sheet at the image acquisition time using the color information and correlation data of the acquired image data, calculates the ultraviolet absorption time of the ultraviolet absorption amount measurement sheet from the application time and the image acquisition time, and then calculates the predicted time from the amount of ultraviolet absorption and the ultraviolet absorption time.

7. The system includes a reading unit that reads the correlation data from the storage unit, The ultraviolet absorption amount measurement system according to claim 6, characterized in that the reading unit reads the correlation data corresponding to the ID of the input ultraviolet absorption amount measurement sheet from the storage unit.

8. A method for measuring ultraviolet absorption using an ultraviolet absorption measuring sheet having an expandable film and an adhesive layer laminated on the expandable film and containing an ink that changes color when it absorbs ultraviolet light, wherein the amount of ultraviolet absorption is measured, The UV absorption measurement sheet is attached to the object, and the ID of the UV absorption measurement sheet is entered into the terminal device. Subsequently, the UV absorption measurement sheet in use is photographed with the terminal device, The ID, the time the UV absorption amount measurement sheet was attached, the acquired image data of the UV absorption amount measurement sheet, and the image acquisition time when the image data was acquired are stored in the storage unit. Based on the application time, the image acquisition time, and the image data, the estimated time at which the UV absorption amount measurement sheet reaches a predetermined UV absorption amount is calculated. A method for measuring ultraviolet absorption amount, characterized by including the notification of the predicted time.

9. This includes storing correlation data created from the correlation between the color information of the image data of the UV absorption amount measurement sheet and the amount of UV absorption in the storage unit, The calculation process described above is: Using the color information and correlation data of the acquired image data, the amount of ultraviolet absorption of the ultraviolet absorption measurement sheet at the time of image acquisition is calculated. The ultraviolet absorption time of the ultraviolet absorption amount measurement sheet is calculated from the aforementioned application time and the aforementioned image acquisition time, The method for measuring ultraviolet absorption amount according to claim 8, characterized in that it subsequently includes calculating the predicted time from the ultraviolet absorption amount and the ultraviolet absorption time.

10. The calculation process described above is: The ultraviolet absorption amount measurement method according to claim 9, characterized in that when the ultraviolet absorption amount measurement sheet is photographed by the terminal device, the correlation data corresponding to the ID is read from the storage unit.

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