Blood flow authentication ring

Abstract

The present invention provides a blood flow authentication ring that can focus photographic images regardless of finger size, prevent contrast degradation due to external light, and simplify user login. The blood flow authentication ring, according to one aspect of the present invention, comprises a ring-shaped cover member that is mounted on a finger and performs authentication through the finger's blood flow. The cover member is provided with at least: an irradiation device for irradiating light onto the finger; and an imaging device for capturing light transmitted through the finger. An adjustment member is provided between the inner periphery of the cover member and the finger; the adjustment member functions as at least one of a size correction member and a low-reflection member. The adjustment member is disposed at least between the inner periphery of the cover member and the back of the finger.

Description

Technical Field

[0001] The present invention relates to a blood flow authentication ring which has a built-in blood flow imaging function in a ring-shaped ring component and performs blood flow photography and personal authentication when mounted on a finger. Background Art

[0002] In recent years, systems that perform identity authentication using biometric information have become widespread. As a method of identity authentication using biometric information, a method using a blood flow reading ring for reading blood flow has been proposed in the industry.

[0003] [Background Art Literature]

[0004] [Patent Document]

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-093368

[0006] Patent Document 2: Japanese Patent No. 4432539 Summary of the Invention

[0007] [Problems to be solved by the invention]

[0008] In the blood flow reading rings of Patent Documents 1 and 2, the distance from the imaging surface to the subject (the finger surface onto which the blood flow is projected) varies depending on the size of the finger, resulting in an image with an out-of-focus intersection. Furthermore, Patent Documents 1 and 2 employ a method of irradiating infrared light or the like and capturing the reflected light. However, this method has the disadvantage of reflecting infrared light or stray light from external light toward the inner circumference of the ring, brightening the image background and reducing the contrast of the blood flow. Furthermore, the owner of the blood flow reading ring must register themselves before performing blood flow authentication. This registration requires, for example, pressing a button mounted on the blood flow reading ring and performing a series of login operations. However, this presents problems such as the complexity of the login operation and the limitations of the ring size due to the placement of the login button.

[0009] An object of the present invention is to provide a blood flow authentication ring that can focus a photographic image regardless of finger size, prevent contrast reduction due to external light, and facilitate user registration.

[0010] [Technical means to solve the problem]

[0011] The blood flow authentication ring of the first aspect of the present invention is characterized in that it has an annular cover part installed on the finger and authenticates through the blood flow of the finger, and the cover part is provided with at least: an irradiation device for irradiating light to the finger; and a camera device for capturing light passing through the finger; the irradiation device and the camera device are opposite to each other and are arranged on the back side of the finger; an adjustment part is provided between the inner periphery of the cover part and the finger; the adjustment part has the functions of a size correction part and a low-reflection part; the adjustment part is arranged at least on the inner periphery of the cover part, between the back side of the finger and the two side surfaces of the finger; the reflectivity of the low-reflection part is less than 10%.

[0012] A blood flow authentication ring according to a second aspect of the present invention is the blood flow authentication ring according to the first aspect, wherein a coefficient of dynamic friction of a surface of the adjustment member is less than 0.2.

[0013] A blood flow authentication ring according to a third aspect of the present invention is the blood flow authentication ring according to the first aspect, wherein a solar panel is provided on the cover member.

[0014] A blood flow authentication ring according to a fourth aspect of the present invention is the blood flow authentication ring according to the first aspect, wherein the light irradiated by the irradiation device is at least one of near-infrared light and red light.

[0015] A blood flow authentication ring according to a fifth aspect of the present invention is the blood flow authentication ring according to the first aspect, wherein the adjustment member is an elastic member.

[0016] A blood flow authentication ring according to a sixth aspect of the present invention is the blood flow authentication ring according to the first aspect, wherein the adjustment member is provided with a light passing portion for passing the light irradiated from the irradiation device.

[0017] A blood flow authentication ring according to a seventh aspect of the present invention is the blood flow authentication ring according to the first aspect, wherein a plurality of at least one of the irradiation device and the imaging device are provided.

[0018] The blood flow authentication ring of the eighth aspect of the present invention is characterized in that it has a ring-shaped cover component installed on the finger, authenticates through the blood flow of the finger, and the cover component is provided with at least: an irradiation device for irradiating light to the finger; and a camera device for capturing light passing through the finger; the irradiation device and the camera device are opposite to each other and are arranged on the back side of the finger; an adjustment component is provided between the inner periphery of the cover component and the finger; the adjustment component has the functions of a size correction component and a low-reflection component; the adjustment component is at least arranged on the inner periphery of the cover component, between the back side of the finger and the two side surfaces of the finger; the reflectivity of the low-reflection component is less than 10%; a finger detection mechanism for detecting the installation of the finger is further provided on the cover component; the blood flow authentication ring has a login function for automatically performing personal authentication login corresponding to the finger when the finger detection mechanism detects the installation of the finger for the first time.

[0019] [Effects of the Invention]

[0020] According to the blood flow authentication ring of the first aspect of the present invention, an adjustment member is provided between the inner periphery of the cover member and the finger. The adjustment member functions as at least one of a size correction member and a low-reflection member. The adjustment member is provided at least between the inner periphery of the cover member and the back side of the finger. Thus, the size correction member acts as a spacer between the cover member and the finger. This allows the focus of a photographic image to be maintained regardless of finger size, preventing a decrease in contrast due to external light, and enabling reliable authentication of the individual, thereby simplifying personal registration. Furthermore, the low-reflection member function reliably eliminates the problem of stray light caused by external light reflecting toward the inner periphery of the ring, brightening the image background and reducing blood flow contrast.

[0021] Furthermore, according to the blood flow authentication ring of the first aspect of the present invention, the adjustment component functions as a low-reflection component, and the reflectivity of the low-reflection component is less than 10%. Regarding the low-reflection component, for example, a sheet-like material whose reflectivity at 850nm to 950nm is suppressed to less than 10% can be used as a surface component. In this case, by setting the surface of the adjustment component to a low reflectivity, reflections on the inner circumference of the ring caused by near-infrared light irradiation or stray light caused by external light are also suppressed, thereby having the effect of obtaining a high-contrast blood flow image. Furthermore, even if the size correction component is not used, the same effect can be obtained by applying the same low-reflection treatment to the inner side of the cover component.

[0022] Furthermore, according to the blood flow authentication ring of the first aspect of the present invention, the size correction member of the adjustment member serves as a spacer in the space between the cover member and the finger, at least between the inner circumference of the cover member and the back and side surfaces of the finger. This allows the photographic image to be focused regardless of finger size and prevents contrast reduction due to external light. Furthermore, the low-reflection member effectively eliminates the problem of stray light from external light reflecting toward the inner circumference of the ring, brightening the image background and reducing blood flow contrast.

[0023] According to the second aspect of the present invention, the blood flow authentication ring has a surface kinetic friction coefficient of less than 0.2 on the adjustment component. This surface treatment reduces finger jamming during insertion, enabling smooth assembly and disassembly. Furthermore, by improving the sliding properties of the surface component, durability is enhanced even after repeated assembly and disassembly.

[0024] According to the blood flow authentication ring of the third aspect of the present invention, by providing a solar panel on the cover member, the power generated by the solar panel can be used to charge a capacitor, battery, etc., thereby providing a blood flow authentication ring that does not require a power source. In addition, when charging the battery with external power supply, the solar panel can be omitted.

[0025] The blood flow authentication ring according to the fourth aspect of the present invention emits at least one of near-infrared light and red light. Since both red and near-infrared wavelengths are readily absorbed by blood flow, near-infrared light or red light is not detected in the portion of the photographic image where blood flow is present, enabling high-precision imaging of blood flow. Furthermore, since near-infrared and red light can be emitted by LEDs, near-infrared LEDs or red LEDs, etc., can be used as the irradiation device.

[0026] According to the blood flow authentication ring of the fifth aspect of the present invention, the adjustment member is an elastic member, and the amount of deflection of the elastic member varies depending on the thickness of the finger. Therefore, the elasticity of the size correction member, for example, allows for seamless installation while absorbing differences in finger thickness and biasing the finger from the dorsal side to the ventral side (from the irradiation device to the imaging device, i.e., downward). As a result, the distance X from the camera module's imaging position to the finger surface remains constant regardless of the size of the finger.

[0027] According to the blood flow authentication ring of the sixth aspect of the present invention, the adjustment member is provided with a light-passing portion for allowing light emitted from the irradiation device to pass therethrough. Furthermore, by providing a through-hole in a portion of the adjustment member, such as the size correction member, corresponding to the position where the LED is arranged, the irradiation light (irradiation beam) from the LED passes through the through-hole and is appropriately irradiated onto the inner circumference of the size correction member. In other words, by providing the light-passing portion in the adjustment member for allowing light emitted from the irradiation device to pass therethrough, the effect of the adjustment member of the first aspect can be exerted, and the irradiation light (irradiation beam) from the LED can be further reliably prevented from being blocked.

[0028] According to the blood flow authentication ring of the seventh aspect of the present invention, at least one of the illumination device and the imaging device is provided in plurality. For example, by configuring multiple LEDs, the light intensity can be increased, thereby expanding the illumination range. Furthermore, by providing multiple camera modules, wide-range imaging can be achieved. Furthermore, it is also possible to combine LEDs of multiple specifications, for example, by combining at least one red LED with a near-infrared LED, a more vivid blood flow image can be obtained.

[0029] According to the eighth aspect of the present invention, in addition to the effects achieved by the blood flow authentication ring of the first aspect, a finger detection mechanism is further provided on the cover member to detect attachment of the finger. The blood flow authentication ring has a login function that automatically performs user authentication and login corresponding to the finger when the finger detection mechanism first detects attachment of the finger. This allows the ring to detect the first attachment of the ring to the finger and automatically performs user login. Furthermore, a blood flow authentication ring can be easily operated without requiring special operations and without imposing restrictions on ring size. This provides a blood flow authentication ring that facilitates user login. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a perspective view of the blood flow authentication ring according to the first embodiment.

[0031] Figure 2 This is an exploded perspective view of the blood flow authentication ring according to the first embodiment.

[0032] Figure 3A This is a longitudinal sectional view of an example in which one near-infrared LED (or red LED) and one camera module are mounted.

[0033] Figure 3B This is a longitudinal sectional view of Modification 1 in which a plurality of near-infrared LEDs (or red LEDs) and a plurality of camera modules are mounted in the first embodiment.

[0034] Figure 4 This is another longitudinal sectional view showing the first embodiment of the invention of the present application.

[0035] Figure 5 This is a diagram showing the structure of the size correction member of the invention of the present application.

[0036] Figure 6 This is a diagram showing the direction of force applied by the deflection of the dimension correction member of the invention of the present application.

[0037] Figure 7A A longitudinal cross-sectional view shows the relative positions of the finger and the blood flow authentication ring of the present application when a person with thick fingers wears the blood flow authentication ring according to the first embodiment.

[0038] Figure 7B This figure shows in longitudinal section the relative positions of the finger and the blood flow authentication ring of the present application when a person with thin fingers according to the first embodiment wears the blood flow authentication ring.

[0039] Figure 8 This is a diagram illustrating authentication determination in the first embodiment.

[0040] Figure 9 It is a perspective view showing unlocking and locking of the door according to the first embodiment.

[0041] Figure 10 This is a flowchart showing door unlocking and locking in the first embodiment.

[0042] Figure 11 This is a longitudinal sectional view of a vital sign sensor and NFC according to the additional embodiment 2.

[0043] Figure 12 This is an enlarged view of the arrangement relationship between the NFC antenna flexure and the solar panel of the invention of the present application.

[0044] Figure 13 This is a flow chart of the blood flow authentication ring of the present invention, from finger insertion to the decision process. DETAILED DESCRIPTION

[0045] The following describes in detail a blood flow authentication ring according to an embodiment of the present invention, with reference to the accompanying drawings. However, the embodiments described below illustrate blood flow authentication rings that embody the technical concepts of the present invention and do not limit the present invention to these embodiments. The embodiments of the present invention illustrate a blood flow authentication ring that can be attached to a finger as a specific example. However, this is merely an example. The blood flow authentication ring according to this embodiment is not limited to attachment to a finger and can be applied to any location as long as it can identify blood flow.

[0046] [Implementation Method 1]

[0047] Regarding the lighting device according to the first embodiment of the present invention, refer to Figures 1 to 10Provide explanation.

[0048] Figure 1 This is a perspective view showing the present embodiment. This figure shows a person who owns the blood flow authentication ring 2 attaching the blood flow authentication ring to his or her finger. Figure 2 Fig. 3 is an exploded perspective view showing the present embodiment. Fig. 3 is a longitudinal sectional view showing the present embodiment. Figure 4 It is a longitudinal sectional view showing this embodiment.

[0049] The following about Figures 1 to 4 The blood flow authentication ring 2 is described below. The outer appearance of the blood flow authentication ring 2 is formed by two front and rear shells, which are composed of a first shell 3 and a second shell 4. The first shell 3 and the second shell 4 are fixed to each other by, for example, bonding, laser welding, or screws. Reference numeral 5 denotes an LED serving as a "near-infrared light irradiation mechanism," such as a near-infrared LED emitting near-infrared light in the 850nm to 950nm range, or a red LED emitting red light in the 600nm to 700nm range.

[0050] Figure 3A This is a longitudinal sectional view of an embodiment in which one LED 5 (near-infrared LED or red LED) and one camera module 12 are each mounted. The blood flow authentication ring 22 of this embodiment is an embodiment in which one LED 5 (near-infrared LED or red LED) is disposed.

[0051] Figure 3B This is a longitudinal cross-sectional view of an embodiment, as Variation 1 of this embodiment, in which multiple LEDs 5 (near-infrared or red) and camera modules 12 are each installed. This Variation 1 increases the light intensity and expands the illumination range by arranging multiple LEDs 5 (near-infrared or red). When using red LEDs, their red wavelengths, like near-infrared wavelengths, are easily absorbed by blood flow. Light transmitted by LEDs 5 with either near-infrared or red wavelengths can capture blood flow images.

[0052] The multiple LEDs 5 may be of the same specification or may be of different specifications. For example, only one LED 5 may have a different wavelength, or two or more LEDs 5 may have different wavelengths. For example, by replacing at least one of the LEDs 5a to 5e with a red LED or combining near-infrared LEDs with red LEDs, a clearer blood flow image can be obtained.

[0053] 6, 6a to 6e are protective glasses that seal the opening provided in the cover and allow the irradiation light of LED 5 (hereinafter sometimes referred to as "near-infrared light") to pass through. 7 represents the irradiation beam of the near-infrared light, and represents irradiation within a range covering the width of the finger from the back side of the finger. 8 is an FPC (flexible printed circuit board) on which circuit components of the blood flow authentication ring 2 are installed. 9 represents a microcomputer that performs various calculations based on the obtained image. 10 is a flexible solar panel that stores electricity in a capacitor not shown while supplying electricity to the circuit, thereby providing a blood flow authentication ring that does not require a battery. Of course, it is also possible to remove the solar panel by supplying electricity from the outside and charging. 11 is a communication module, such as a BLE (Bluetooth Low Energy) module, which has the function of pairing with an external device with low power consumption to communicate information.

[0054] 12, 12a-12c are composed of a substrate and lens unit equipped with an image sensor in a camera module, capable of capturing images from the underside of a finger. The camera module 12 is positioned to capture light emitted by the LED 5, for example, along the same circumference of the first and second housings 3 and 4. Figure 3A This is an embodiment in which one camera module is configured. Figure 3B Generally, multiple LEDs 5 (near infrared LEDs or red LEDs) are configured to increase the amount of light and expand the irradiation range, and the embodiment includes multiple camera modules 12. Figure 3B An example of 5 LEDs 5 and 3 camera modules 12 is shown in the figure, but this variation is not limited to this. As long as the camera module 12 is configured to capture the light emitted by the LED 5, the number of LEDs 5 and camera modules 12 can be set to any number of more than 1 respectively, and their configuration is also arbitrary.

[0055] Reference numeral 13 represents the light beam within the imaging range (field of view) of this camera module. Reference numeral 14 represents an optical filter, which can be, for example, a visible light cutoff filter that blocks at least 90% of light with a wavelength of less than 850nm to 950nm. Using a visible light cutoff filter as an optical filter improves blood flow authentication accuracy by preventing the capture of wrinkles and scars on the finger surface that are not necessary for blood flow authentication. Reference numeral 15 represents a size correction component, which is placed between the finger and the ring.

[0056] The LED 5, the communication module 11, and the microcomputer 9 are mounted on the FPC 8. The first housing 3 is provided with a circumferential groove, and the FPC 8 is fixed between the first housing 3 and the second housing 4 in an arc-shaped state along the groove. The second housing 4 is provided with a circumferential groove similar to the first housing 3. In addition, the second housing 4 is provided with an opening on the inner circumference of the LED 5 at the configuration position of the LED 5 so that the irradiation light of the LED 5 can pass through. The camera module 12 is accommodated in the camera module accommodation portion in the groove of the second housing 4. Since the optical filter 14 is provided on the inner circumference of the camera module accommodation portion, the irradiation light (irradiation light beam 7) from the LED 5 passes through the optical filter 14 and is captured by the camera module 12 as a camera light beam 13.

[0057] The size correction member 15 is a substantially U-shaped member extending along an arc. It is located on the inner periphery of the first and second housings 3 and 4, and functions as a spacer between the inner periphery of the first and second housings 3 and 4 and the outer periphery of the finger. A through-hole is provided in the portion of the size correction member 15 corresponding to the location of the LED 5. The irradiation light (irradiation beam 7) from the LED 5 passes through this through-hole and is irradiated onto the inner periphery of the size correction member 15.

[0058] Figure 5 This figure shows the structure of the size correction component 15 of the invention of the present application. The size correction component 15 is composed of an elastic component 15a and a surface component 15b. The elastic component 15a is an elastic component, and the surface component 15b is a sheet-like material that suppresses the reflectivity of the 850nm to 950nm wavelength to less than 10%, and is formed integrally with the elastic portion. In addition, the surface component 15b is surface-treated to have a dynamic friction coefficient of less than 0.2, which reduces the sticking when inserting a finger and enables smooth assembly and disassembly. Furthermore, by improving the sliding properties of the surface of the surface component 15b, the durability under repeated assembly and disassembly is improved.

[0059] Figure 6 The diagram shows the direction of force applied by the deflection of the size correction member 15 of the present invention. The size correction member 15 supports at least the upper direction (back side) and both sides of the finger, and the elastic force acts on the finger when installed. Figure 6 In the directions indicated by arrows 16a, 16b, and 16c, push your finger toward the center of the ring in the left-right direction and downward (toward the camera module) in the up-down direction.

[0060] Figure 7A This figure shows in longitudinal section the relative positions of the finger 1 and the blood flow authentication ring 2 when the blood flow authentication ring 2 of the present invention is worn by a person with thick fingers. Figure 7BThis figure shows in longitudinal section the relative positions of the finger 1 and the blood flow authentication ring 2 when the blood flow authentication ring 2 of the present invention is worn by a person having thin fingers.

[0061] exist Figure 7A In the embodiment, since a thicker finger is inserted into the blood flow authentication ring 2, the size correction member 15 is bent from the inner circumference to the outer circumference by a bending amount 17a. Figure 7B In the example, since a thin finger is inserted into the blood flow authentication ring 2, the size correction member 15 bends from the inner circumference to the outer circumference by a bending amount 17b. At this time, the bending amount 17a is larger than the bending amount 17b due to the thickness of the finger. In this way, since the bending amounts 17a and 17b of the size correction member 15 vary according to the thickness of the finger, Figure 7A 、 Figure 7B As shown in FIG, the size correction member 15 can be installed without gaps while absorbing the difference in thickness of the finger by the elasticity of the size correction member 15, and can be pushed downward (toward the camera module). As a result, no matter how big the finger is, it will be removed from the camera module 12's imaging position (focal plane, Figure 7A and Figure 7B The distance X from the imaging position of the finger 1 to the surface of the finger 1 is kept constant.

[0062] Since the blood vessels of the finger are located inside the finger, the image irradiated by the near-infrared light is temporarily projected onto the surface of the finger and the projected image is captured, so the image is captured from the imaging position (focal plane, Figure 7A and Figure 7B The distance X from the imaging position to the surface of the finger is constant, which has the advantage of obtaining a stable in-focus image regardless of the thickness of the human finger. In addition, the invention of the present application uses a sheet-like material with a reflectivity of less than 10% in the range of 850nm to 950nm as the surface component 15b, thereby setting the surface of the size correction component 15 to a low reflectivity. This also suppresses reflections on the inner circumference of the ring caused by near-infrared light irradiation or stray light caused by external light, thereby achieving a high-contrast blood flow image. However, in the absence of the size correction component, the same effect can be achieved by applying the same low-reflectivity treatment to the inner side of the housing.

[0063] Figure 8 This figure illustrates the authentication determination process of the present invention. Before the owner of the blood flow authentication ring 2 performs blood flow authentication, they must first register for personal authentication (registration image 18). Images 19a, 19b, 19c, 19d, and 19e are blood flow images captured from different individuals' fingers. The blood flow authentication ring of the present invention compares the pre-acquired registration image 18 with the blood flow authentication image. If images 19a through 19d differ from the owner's blood flow, and only image 19e matches the registration image, the ring determines whether the wearer is the owner.

[0064] Figure 9 This is a perspective view showing door unlocking and locking using the blood flow authentication ring 2 of this embodiment. Reference numeral 20 denotes a diagnostic receiver capable of receiving BLE signals as communication signals. Reference numeral 21 denotes a device for unlocking and locking the door. Reference numeral 22 denotes a door handle for opening and closing the door. Reference numeral 23 denotes communication, for example, BLE communication.

[0065] Figure 10 This is a flowchart showing how the blood flow authentication ring of the present invention unlocks and locks a door. When the login image and the camera image described above match and are authenticated (authentication is possible) (flowchart 24), pairing and information communication are performed between the blood flow authentication ring 2 of the present invention and the receiving device 20 installed on the door (flowchart 25). When the door receiving device 20 receives the authentication signal, the door is unlocked by sending an unlock signal to the unlocking / locking device 21 (flowchart 26). Then, the door to the room is automatically locked after a specified period of time after closing.

[0066] The blood flow authentication result performed by the blood flow authentication ring 2 is sent to the receiving machine 20 through the communication module 11 via the communication 23, such as BLE communication. Thus, when the blood flow authentication result is authenticatable, the door lock 21 can be unlocked or locked. On the other hand, when the blood flow authentication result is not authenticatable, the door lock 21 cannot be unlocked or locked. Thus, only when the blood flow authentication result from the blood flow authentication ring 2 is authenticatable and appropriate communication is established from the blood flow authentication ring 2, even when the mechanical keyboard is not used, the door lock 21 cannot be unlocked or locked non-contacted through the communication 23.

[0067] For example, when the blood flow authentication ring 2 is lost or stolen, even if someone else uses the blood flow authentication ring 2 to try to unlock or lock the door lock 21, the blood flow authentication result cannot be authenticated for the other person's fingers, so the other person cannot perform the contactless unlocking or locking operation of the door lock 21 using the blood flow authentication ring 2.

[0068] [Implementation Method 2]

[0069] Regarding the blood flow authentication ring of the second embodiment of the present invention, refer to Figure 11 and Figure 12 Explain. Figures 1 to 10 The same components are denoted by the same reference numerals and their descriptions are omitted. Figure 11 This is a longitudinal sectional view of the vital sign sensor and NFC according to the additional embodiment 2.

[0070] The blood flow authentication ring 2 of this embodiment is equipped with a small reflective sensor (hereinafter referred to as a vital sign sensor) 29, which incorporates a red LED and an infrared LED, along with a highly sensitive photodiode that receives their reflected light, in a single package; a near-field wireless communication device (hereinafter referred to as NFC) 27; and an antenna flexure (an antenna-mounted flexible circuit substrate) 28. This vital sign sensor 29 measures blood oxygen saturation (hereinafter referred to as SpO2) based on the ratio (R / IR) of the varying components of the transmitted red (R) and infrared (IR) light amounts. Furthermore, by observing the pulsation (variable component), the composition of only arterial blood can be observed, and by observing this fluctuation, the pulse can also be determined simultaneously. Furthermore, the intervals between pulse beats fluctuate subtly, and the degree of this pulse fluctuation is referred to as the "stress level." The greater the pulse fluctuation, the lower the stress level. If the heart rate fluctuates slightly, that is, at a constant interval, the stress level increases. Furthermore, experiments have shown that the acceleration pulse wave, obtained by performing the second-order differential of the pulse, is correlated with blood pressure, allowing blood pressure to be estimated. Thus, this vital sign sensor can measure SpO2 values, pulse, stress levels, and estimate blood pressure.

[0071] NFC, short for "Near Field Communication," refers to short-range wireless communication. It is a technology and payment method that enables communication simply by covering a non-contact IC chip. It is used in smartphones and prepaid cards. Furthermore, in recent years, NFC-equipped credit cards and smart rings for payment have also appeared, simplifying transactions. However, the risk of someone other than the user being able to process transactions easily due to the loss of the device or card is considered a problem. This design enables the NFC function only when the ring has authenticated the user, offering the significant advantage of preventing transactions by someone other than the user. Furthermore, since the non-contact IC chip is embedded in a relatively flat surface of the card or smartphone, covering this embedded flat surface allows for high-sensitivity communication even when in close proximity. On the other hand, smart rings sometimes have few flat areas, resulting in variations in communication sensitivity when covered, making response difficult. In this design, the following structure is adopted: by configuring the NFC antenna flexible part 28 for NFC in addition to the non-contact IC NFC 27 in a wide part inside the ring surface, the communication sensitivity is improved and it is easy to respond in various covering methods.

[0072] Figure 12This diagram magnifies the placement of the NFC antenna flexure 28 and the solar panel 10. The solar panel 10 is located on the outermost portion of the first housing 4, with the NFC antenna flexure 28 positioned on its backside. This prevents obstruction of the solar panel 10, maximizing light reception efficiency. Furthermore, since the solar panel 10 is non-magnetic, even with the NFC antenna flexure 28 positioned on its backside, NFC communication sensitivity is not affected.

[0073] Figure 13 This is a flowchart showing the blood flow authentication ring 2 of this embodiment, from finger insertion to the decision process. The premise is that the blood flow authentication ring 2 has an identification number printed and written on each ring during the manufacturing process, and the decision system is ultimately activated (validated) in accordance with the ring's identification number. To prevent anyone from passing the decision based on the ring's identification number, as described above, the owner of the blood flow authentication ring 2 must register their identity before undergoing blood flow authentication. The blood flow authentication ring 2 operates its vital sign sensor at a regular interval to detect whether the ring is installed or not (flowchart 30). When the ring is detected to be installed from an uninstalled state and it is determined to be the first time it is installed (flowchart 31), the owner automatically registers their identity (flowchart 32). Consequently, the NFC function becomes active when the ring is installed (flowchart 34), enabling decision processing (flowchart 36). When the blood flow authentication ring 2 is temporarily removed from the finger, the ring's authentication status is reset through the previously described installation / not-installation detection. Then, when the installation status is detected again and it is determined to be the second or subsequent installation, the authentication process begins (flowchart 24). The blood flow authentication ring 2 compares the previously acquired login image with the blood flow authentication image and, based on whether they match the login image, determines whether the installer is the owner (flowchart 33). If the installer is determined to be the owner, the NFC function is enabled; if the determination cannot be made, the NFC function is disabled (flowcharts 34 and 35). Then, if the NFC function is enabled, a decision process is performed (flowchart 36).

[0074] The blood flow authentication ring 2 has been described above in the embodiments of the present invention. However, the embodiments described are examples of the blood flow authentication ring 2 used to concretize the technical ideas of the present invention. The present invention is not specific to these, and can also be applied in the same manner to other embodiments such as variations of combinations of various embodiments and various embodiments.

[0075] In the embodiments of the present invention, a blood flow authentication ring for attachment to a finger is described as a specific example. However, this is merely an example. The blood flow authentication ring of this embodiment is not limited to attachment to a finger and can be applied to any part of the body as long as it can detect blood flow. For example, it can also be applied to the arms, legs, face (e.g., ears), etc.

[0076] The flowchart for user authentication is merely an example, and various other programs and flowcharts are applicable to the embodiments of the present invention.

[0077] The structure and shape of the blood flow authentication ring 2 shown in the embodiment are merely examples, and the structure and shape of the embodiment are not limited thereto. The design has a wide range of freedom in terms of design, assembly, and selection of parts.

[0078] [Industrial Applicability]

[0079] By disposing a size correction component on the inner circumference of the blood flow authentication ring 2, the distance from the camera unit to the finger surface can be kept constant even for fingers of varying sizes, thus offering industrial applicability. Furthermore, as a ring with blood flow authentication and adjudication functions, as well as vital sign information acquisition functions, the ring is easy to use by anyone, since the entire process from user login to authentication is simple, and it is also secure in terms of security, thus offering industrial applicability.

[0080] [Explanation of symbols]

[0081] 1 finger

[0082] 2 Blood flow authentication ring

[0083] 31st shell

[0084] 4 Second shell

[0085] 5. 5a~5e LED (near infrared light irradiation mechanism)

[0086] 6. 6a~6e protective glass

[0087] 7LED 5's irradiation beam

[0088] 8FPC

[0089] 9 Microcomputer

[0090] 10 solar panels

[0091] 11 Communication Module

[0092] 12, 12a~12c camera modules

[0093] 13 Camera Beam

[0094] 14 Optical Filters

[0095] 15 Size Correction Parts

[0096] 15a Elastic component

[0097] 15b Surface components

[0098] 16a, 16b, 16c elastic force

[0099] 17a, 17b deflection

[0100] 18 login images

[0101] 19a~19e obtain images

[0102] 20 receiving machine

[0103] 21Unlock and lock the machine

[0104] 22 Door handle

[0105] 23 Communication

[0106] 24 Certification Process

[0107] 25 BLE Process

[0108] 26 Unlocking and locking process

[0109] 27NFC

[0110] 28 Antenna flexure

[0111] 29 Vital Signs Sensors

[0112] 30 Installation Process

[0113] 31 Installation Count Determination Process

[0114] 32 Personal Login Process

[0115] 33 Identification and Determination Process

[0116] 34 NFC Valid Process

[0117] 35 NFC invalid process

[0118] 36 Adjudication Process.

Claims

1. A blood flow authentication ring, characterized in that It has a ring-shaped cover part that is installed on the finger and authenticates through the blood flow of the finger, and The cover component is provided with at least: an irradiation device for irradiating light toward the finger; as well as a camera device for capturing light passing through the finger; The irradiation device is opposite to the camera device and is arranged on the back side of the finger; An adjustment component is provided between the inner periphery of the cover component and the finger; The adjustment component has the functions of a size correction component and a low-reflection component; The adjustment member is arranged at least between the inner peripheral side of the cover member and the back side of the finger and both side surfaces of the finger; The reflectivity of the low-reflection member is less than 10%. 2 . The blood flow authentication ring according to claim 1 , wherein a coefficient of dynamic friction of a surface of the adjustment member is less than 0.

2. 3 . The blood flow authentication ring according to claim 1 , wherein a solar panel is provided on the cover member. 4 . The blood flow authentication ring according to claim 1 , wherein the light irradiated by the irradiation device is at least one of near-infrared light and red light. The blood flow authentication ring according to claim 1 , wherein the adjustment component is an elastic component. 6 . The blood flow authentication ring according to claim 1 , wherein the adjustment member is provided with a light passing portion that allows the light irradiated from the irradiation device to pass therethrough. 7 . The blood flow authentication ring according to claim 1 , wherein at least one of the irradiation device and the imaging device is provided in plurality.

8. A blood flow authentication ring, characterized in that It has a ring-shaped cover part that is installed on the finger and authenticates through the blood flow of the finger, and The cover component is provided with at least: an irradiation device for irradiating light toward the finger; as well as a camera device for capturing light passing through the finger; The irradiation device is opposite to the camera device and is arranged on the back side of the finger; An adjustment component is provided between the inner periphery of the cover component and the finger; The adjustment component has the functions of a size correction component and a low-reflection component; The adjustment member is arranged at least between the inner peripheral side of the cover member and the back side of the finger and both side surfaces of the finger; The reflectivity of the low-reflection component is less than 10%; The cover member is further provided with a finger detection mechanism for detecting the installation of the finger; The blood flow authentication ring has a login function for automatically performing personal authentication login corresponding to the finger when the finger detection mechanism detects the attachment of the finger for the first time.

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