Composite sensor module structure and user device provided with the same

Abstract

This invention discloses a composite sensor module structure and a user device incorporating the composite sensor module structure. The invention includes: a printed circuit board; a fingerprint recognition sensor module disposed on the printed circuit board; and a photoplethysmography (PPG) sensor module disposed on the printed circuit board, adjacent to the fingerprint recognition sensor module. According to this invention, fingerprint recognition and PPG measurement functions are provided in an integrated manner. Therefore, in various user devices such as massage chairs, automobiles, and office equipment, both fingerprint-based user authentication and PPG-based user health monitoring and management functions can be simultaneously provided.

Description

Technical Field

[0001] This invention relates to a composite sensor module structure and a user device equipped with a composite sensor module structure. More specifically, it relates to a composite sensor module structure and a user device equipped with a composite sensor module structure that can simultaneously provide user authentication functions via fingerprint recognition and user health monitoring and management functions via photoplethysmography in various user devices such as massage chairs, automobiles, and office equipment. Background Technology

[0002] There are already various products on the market that use photoplethysmogram (PPG) sensors to acquire biological information such as blood oxygen saturation and pulse to monitor and manage users' health status.

[0003] However, photoplethysmography requires the user's body parts to be in contact with the sensor. Due to this inconvenience, apart from some products such as smartwatches and smart bracelets, the actual usage frequency of such products is not high.

[0004] On the other hand, with the increasing awareness of the importance of security in recent years and the convenience compared to existing user authentication technologies, fingerprint recognition user authentication technology is now widely used.

[0005] Therefore, if a technology that combines fingerprint recognition and photoplethysmography (PPG) measurement is developed, it is expected to play an important role in the industrial sector. However, such a technology has not yet been proposed. Summary of the Invention

[0006] Therefore, the purpose of this invention is to provide a composite sensor module structure and a user device equipped with the composite sensor module structure, which integrates fingerprint recognition and photoplethysmography (PPG) measurement functions. Thus, in various user devices such as massage chairs, automobiles, and office equipment, both fingerprint-based user authentication and PPG measurement-based user health monitoring and management functions can be provided simultaneously.

[0007] The purpose of this invention is not limited to this; those skilled in the art can clearly understand other technical objectives through the following description.

[0008] To achieve the aforementioned objective, the composite sensor module structure includes: a printed circuit board; a fingerprint recognition sensor module disposed on the printed circuit board; and a photoplethysmography (PPG) sensor module disposed on the printed circuit board, adjacent to the fingerprint recognition sensor module.

[0009] Preferably, the composite sensor module structure further includes a light-transmitting panel disposed on the upper part of the fingerprint recognition sensor module and the photoplethysmography sensor module.

[0010] Furthermore, the composite sensor module structure also includes a lens panel, which is disposed at the lower part of the light-transmitting panel.

[0011] Furthermore, the composite sensor module structure also includes a control module for controlling the operation of the fingerprint recognition sensor module and the photoplethysmography sensor module.

[0012] Furthermore, after user authentication is completed through the fingerprint recognition sensor module, the control module stops the operation of the fingerprint recognition sensor module, allowing the photoplethysmography sensor module to operate.

[0013] On the other hand, the user equipment of the present invention is provided with the composite sensor module structure.

[0014] According to the present invention, fingerprint recognition and photoplethysmography (PPG) measurement functions are provided in an integrated manner. Thus, in various user devices such as massage chairs, automobiles, and office equipment, user authentication functions via fingerprint recognition and user health monitoring and management functions via PPG measurement can be provided simultaneously.

[0015] The effects of the present invention are not limited to those mentioned above. Those skilled in the art to which this invention pertains can clearly understand other effects not mentioned through the following description. Attached Figure Description

[0016] Figure 1 This is a structural diagram illustrating the composite sensor module structure of the first embodiment of the present invention.

[0017] Figure 2 This is a flowchart illustrating the working principle of the composite sensor module structure according to the first embodiment of the present invention.

[0018] Figure 3 This is a structural diagram illustrating the composite sensor module structure of the second embodiment of the present invention.

[0019] Figure 4 This is a structural diagram illustrating the composite sensor module structure according to the third embodiment of the present invention.

[0020] Figure 5 This diagram illustrates how a fingerprint sensor, a PPG sensor, and an MCU are interconnected on a single circuit board, according to another embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures

[0022] 100: Printed Circuit Board; 200: Fingerprint Recognition Sensor Module

[0023] 300: Photoplethysmography (PPG) sensor module; 400: Transparent panel

[0024] 500: Control module; 550: Communication module

[0025] 600: Lens panel; 800: Hybrid sensor module

[0026] 810: Light-emitting part; 830: Light-receiving part

[0027] 850: Image Acquisition Department Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings. It should be noted that even if the same structural elements are shown in different drawings, they may be represented by the same reference numerals. Furthermore, detailed descriptions of well-known functions and structures that might unnecessarily obscure the spirit of the invention will be omitted.

[0029] Figure 1 A structural diagram illustrating the composite sensor module structure according to a first embodiment of the present invention is provided. (Refer to...) Figure 1 The composite sensor module structure of the first embodiment of the present invention includes a brush circuit board 100, a fingerprint recognition sensor module 200, a photoplethysmography (PPG) sensor module 300, a light-transmitting panel 400, a control module 500, and a communication module 550.

[0030] In the printed circuit board 100, the fingerprint recognition sensor module 200 and the photoplethysmography sensor module 300 are arranged adjacent to each other, and a light-transmitting panel 400, which is a glass panel, is provided on the upper part of the fingerprint recognition sensor module 200 and the photoplethysmography sensor module 300.

[0031] In the implementation of the present invention, the fingerprint recognition sensor module 200 can be an optical fingerprint recognition sensor that works in the following manner: it illuminates visible light onto the user's fingerprint placed on the upper surface of the light-transmitting panel 400, and receives the reflected visible light through an image sensor (CCD, CMOS) and generates a fingerprint image.

[0032] The photoplethysmogram (PPG) sensor module 300 uses an internal green light-emitting diode to illuminate a user's finger placed on a light-transmitting panel 400 with green light. The internal light-receiving sensor can receive reflected light from the illuminated green light, excluding light absorbed by blood through blood vessels.

[0033] As described above, the fingerprint image information generated by the fingerprint recognition sensor module 200 and the measurement information in the photoplethysmography sensor module 300 can be sent to the control module 500 through the communication module 550 provided on the printed circuit board 100.

[0034] On the other hand, the control module 500 controls the operation of the fingerprint recognition sensor module 200 and the photoplethysmography sensor module 300 respectively through the communication module 550.

[0035] Figure 2 This is a flowchart illustrating the working principle of the composite sensor module structure according to the first embodiment of the present invention. Hereinafter, refer to... Figure 1 and Figure 2 The working principle of the composite sensor module structure of the first embodiment of the present invention is explained.

[0036] First, in order to use the user equipment provided with the composite sensor module structure of the present invention, after the user places his finger on the light-transmitting panel 400 in order to perform user authentication, the fingerprint of the corresponding finger comes into contact with the upper surface of the light-transmitting panel 400 (step S710).

[0037] In the implementation of this invention, a touch sensor may be provided on the light-transmitting panel 400. The control module 500, which receives detection information from the touch sensor used to detect user contact, may send a control signal to the communication module 550 to enable the fingerprint recognition sensor module 200 to start working.

[0038] Thus, the fingerprint recognition sensor module 200 illuminates visible light toward the light-transmitting panel 400 through its internal light source, and the fingerprint image generated by the image sensor (CCD, CMOS) that receives the visible light reflected from the user's fingerprint can be sent to the control module 500 through the communication module 550 (step S730).

[0039] Therefore, the control module 500 compares the fingerprint image received from the fingerprint recognition sensor module 200 with the pre-registered fingerprint image to perform user authentication. As described above, when user authentication is completed, a control signal that causes the fingerprint recognition sensor to stop working can be sent to the communication module 550 (step S750).

[0040] Therefore, the fingerprint recognition sensor module 200 stops illuminating visible light and enters a stopped working state. Subsequently, during the user's use of the user device, the fingerprint recognition sensor module 200 is prevented from working unnecessarily while the light-transmitting panel 400 is in contact with the finger, thereby preventing partial malfunction of the photoplethysmography sensor module 300. At the same time, the fingerprint recognition sensor module 200 is prevented from consuming power unnecessarily.

[0041] On the other hand, when user authentication is completed through the fingerprint recognition sensor module 200, the control module 500 sends a control signal to the communication module 550 to enable the photoplethysmography sensor module 300 to start working, thereby enabling the photoplethysmography sensor module 300 to start irradiating green light onto the user's finger placed on the light-transmitting panel 400 (step S770).

[0042] As described above, as the light sensor receives the reflected light from the green light illuminating the user's finger (excluding light absorbed by the blood through the blood vessels) and sends the measurement information (light information) to the control module 500 via the communication module 550, the control module 500 can monitor and analyze the user's status such as blood oxygen saturation and pulse based on the measurement information from the photoplethysmography sensor module 300 (step S790).

[0043] Figure 3 This is a structural diagram illustrating the composite sensor module structure according to the second embodiment of the present invention. The structure and working principle of the composite sensor module structure according to the second embodiment of the present invention are similar to... Figure 1 The composite sensor module structure of the first embodiment of the present invention is the same, except that a lens panel 600 is additionally provided on the lower surface of the light-transmitting panel 400.

[0044] In the implementation of the present invention, the lens panel 600 may include a first lens portion for performing a light-focusing function, which focuses the light reflected from the user's fingerprint by refracting it and inputs it into the image sensor of the fingerprint recognition sensor module 200.

[0045] Furthermore, the lens panel 600 may include a second lens portion for performing a diffusion function, increasing the brightness of the light irradiated from the photoplethysmography sensor module 300, while uniformly transmitting the irradiated light to the front of the light-transmitting panel 400.

[0046] As described above, in the lens panel 600, the first lens portion is disposed in the upper region of the fingerprint recognition sensor module 200, and in the lens panel 600, the second lens portion is disposed in the upper region of the photoplethysmography sensor module 300.

[0047] Figure 4 This is a structural diagram illustrating the composite sensor module structure according to the third embodiment of the present invention. The working principle of the composite sensor module structure according to the third embodiment of the present invention is similar to... Figure 1 The composite sensor module structure of the first embodiment of the present invention is the same as that in the present invention. Figure 2 Similarly, the composite sensor module structure of the third embodiment of the present invention may also have a lens panel 600 additionally provided on the lower surface of the light-transmitting panel 400.

[0048] Reference Figure 4 Instead of the fingerprint recognition sensor module 200 and the photoplethysmography sensor module 300 respectively disposed on the printed circuit board 100, the composite sensor module structure of the third embodiment of the present invention is provided with a hybrid sensor module 800, which integrates the functions of the fingerprint recognition sensor module 200 and the photoplethysmography sensor module 300 as a sensor module.

[0049] Specifically, the hybrid sensor module 800 may include a light-emitting unit 810, a light-receiving unit 830, and an image acquisition unit 850.

[0050] The light-emitting part 810 irradiates green light toward the light-transmitting panel 400. A portion of the green light irradiated by the light-emitting part 810 is reflected by the user's fingerprint and input into the image acquisition unit 850 such as the image sensor. The fingerprint image generated by the image acquisition unit 850 can be sent to the control module 500 through the communication module 550.

[0051] On the other hand, in the green light irradiated by the light-emitting part 810, another part (the remaining part) irradiates the user's finger. As the light-receiving part 830, such as the light-receiving sensor, receives the reflected light from the green light irradiated on the user's finger, excluding the light absorbed by blood pressure through blood vessels, the measurement information (light-receiving information) can be transmitted to the control module 500 through the communication module 550.

[0052] As described above, the hybrid sensor module 800 of the present invention uses green light from the visible light source 810 to illuminate the light source as light that can be easily absorbed by hemoglobin in the blood. It can simultaneously realize the photoplethysmography (PPG) measurement function and the fingerprint recognition function by illuminating the reflected light only once.

[0053] As described above, according to the hybrid sensor module 800 of the present invention, a single light-emitting part 810 irradiated with green light can simultaneously realize the user's fingerprint recognition function and photoplethysmography (PPG) measurement function.

[0054] On the other hand, during the implementation of the present invention, when user authentication is completed based on the fingerprint image received from the image acquisition unit 850, the control module 500 sends a control signal to the hybrid sensor module 800 via the communication module 550 to stop the image acquisition unit 850, such as the image sensor, from working. Subsequently, during the continuous execution of the photoplethysmography function, unnecessary power consumption by the image acquisition unit 850 can be prevented.

[0055] Moreover, in the implementation of this invention, with Figure 3 Similarly, in Figure 4A lens panel 600 may be provided on the lower surface of the light-transmitting panel 400. In this case, the first lens portion is provided in the upper region of the image acquisition unit 850 in the lens panel 600, and the second lens portion may be provided in the upper region of the light-receiving unit 830 in the transparent panel 600.

[0056] On the other hand, the user equipment equipped with the composite sensor module structure of the present invention can be a massage chair, a car, an office equipment, etc.

[0057] Specifically, the composite sensor module structure of the present invention is installed in the massage chair, thereby not only verifying the user of the massage chair, but also monitoring the user's health status based on the bio-information such as blood oxygen saturation and pulse collected by the composite sensor module structure.

[0058] Furthermore, the composite sensor module structure of the present invention is installed in the steering device of a car, thereby not only verifying the user driving the car, but also monitoring the health status of the user while driving based on the bio-information such as blood oxygen saturation and pulse collected by the composite sensor module structure.

[0059] Furthermore, the composite sensor module structure of the present invention is installed in office equipment such as electronic pens, mice, and keyboards. Thus, it can not only authenticate users of office equipment, but also monitor the health status of users who are working based on bio-information such as blood oxygen saturation and pulse collected through the composite sensor module structure.

[0060] On the other hand, the order of steps S710 to S790 in this invention is merely an example and is not limited thereto. That is, the order of steps S710 to S790 can be changed, and some steps can be performed simultaneously or deleted.

[0061] Figure 5 This illustration shows an embodiment where a fingerprint sensor, a PPG sensor, and an MCU are interconnected on a single circuit board. The key feature of this embodiment is the sequential processing of two different types of biometric signals through an integrated circuit structure. As shown, the fingerprint sensor directly transmits RAW fingerprint data to the MCU via SPI signal lines (MOSI, MISO, clock, and chip select signals). Separate reset and interrupt signals are configured to initialize the sensor state or notify of events. The fingerprint sensor uses a capacitive method to sense the fingerprint texture and converts the sensed texture into an image in the form of a pixel array. After receiving this image, the MCU performs preprocessing, feature point extraction, and template matching to determine whether fingerprint authentication is successful.

[0062] also, Figure 5The image shows a PPG sensor in the form of a standalone optical module, which includes an LED driver, a photodiode photosensitive unit, and an internal LDO voltage regulator circuit. The PPG sensor transmits and receives measurement settings and sensor status signals via I²C data and clock lines with the MCU. Changes in reflected light intensity detected internally by the sensor are generated as an analog voltage and transmitted to the MCU along with an interrupt signal to notify the MCU of the sampling time. The MCU adjusts the light intensity in real time by controlling the LED drive current and PWM duty cycle, and performs ADC sampling on the waveform output by the photodiode, followed by filtering, waveform slope analysis, peak detection, and other processing to obtain the user's blood flow change characteristics.

[0063] exist Figure 5 In the circuit configuration shown, fingerprint recognition and PPG measurement are both controlled sequentially by the same MCU. Before the fingerprint authentication step is completed, the LED and photosensitive part of the PPG sensor are inactive to avoid optical interference between the two types of sensors and minimize power consumption. Only after the user's fingerprint authentication is successful does the MCU switch the control signal to activate the PPG sensor, thereby continuously acquiring static biometric information based on fingerprints and dynamic biometric information based on blood flow in the same process, realizing a dual authentication structure.

[0064] The core of this circuit lies in the fact that although fingerprint data and PPG waveform data are input to the MCU through independent paths, the MCU can comprehensively judge the two types of data, thereby enabling a combined verification of the user's physical characteristics and bioactivity. Compared with existing authentication methods that rely solely on single biometric information, this structure significantly enhances resistance to forgery and can further judge based on the correlation between biometric information, thereby reducing authentication errors and improving security.

[0065] The test points illustrated are used to verify the data flow, interrupt response, and power stability between the sensor and the MCU, respectively. This is a debugging structure that directly verifies the actual signal quality and response performance of the integrated module during the manufacturing process. This type of test point configuration can reduce quality deviations in the production process and help improve the operational reliability of the module.

[0066] Therefore, Figure 5The circuit structure shown integrates static fingerprint-based biometric information and dynamic PPG-based biometric information within a single MCU, structurally fusing signal paths and control logic. This allows the actions of the two heterogeneous sensors to be separated in time but linked in function, which is of significant technical importance. In particular, the linkage method, which uses the success or failure of fingerprint authentication as the control criterion for PPG measurement actions, can simultaneously achieve multiple effects such as anti-interference, improved energy efficiency, and enhanced security. This constitutes a key technical difference in improving authentication accuracy by combining two types of biometric authentication signals within a single circuit. This structure enables composite authenticity judgment capabilities that existing single-sensor biometric authentication systems cannot provide, thus becoming a core technical point supporting the requirements of novelty and progress.

[0067] In this invention, the terminology used is for illustrative purposes only and is not intended to limit the invention. Unless the context clearly indicates otherwise, singular expressions include plural expressions. In this application, terms such as "comprising" or "having" are used to specify the presence of features, numbers, steps, operations, structural elements, components, or combinations thereof described in the specification, and should not be construed as pre-excluding the presence or additional possibilities of one or more other features, numbers, steps, operations, structural elements, components, or combinations thereof.

[0068] While the preferred embodiments and application examples of the present invention have been described above, the present invention is not limited to the specific embodiments and application examples described. It should be understood that those skilled in the art can make various modifications to the present invention without departing from the spirit of the present invention within the scope of protection claimed, and such modifications should not be understood separately from the technical concept or prospect of the present invention.

Claims

1. A composite sensor module structure, characterized in that, include: Printed circuit board (100); A fingerprint recognition sensor module (200) is disposed on the printed circuit board (100). as well as A photoplethysmography (PPG) sensor module (300) is disposed on the printed circuit board (100) and is disposed adjacent to the fingerprint recognition sensor module (200).

2. The composite sensor module structure according to claim 1, characterized in that, It also includes a light-transmitting panel (400) disposed on the upper part of the fingerprint recognition sensor module (200) and the photoplethysmography sensor module (300).

3. The composite sensor module structure according to claim 2, characterized in that, It also includes a lens panel (600) disposed at the lower part of the light-transmitting panel (400).

4. The composite sensor module structure according to claim 1, characterized in that, It also includes a control module (500) for controlling the operation of the fingerprint recognition sensor module (200) and the photoplethysmography sensor module (300).

5. A user equipment, characterized in that, The composite sensor module structure according to any one of claims 1 to 4 is provided.

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