CN210871603U - Blood oxygen parameter detection module and electronic equipment thereof - Google Patents

Abstract

The blood oxygen parameter detection module comprises an optical signal emission module and a blood oxygen parameter detection device; the optical signal transmitting module comprises two optical signal transmitting sub-modules; the blood oxygen parameter detection device comprises an optical signal filtering module, a photoelectric conversion module and a signal processing module; the optical signal filtering module comprises a plurality of filtering areas, and different filtering areas are arranged in a cross way; the photoelectric conversion module comprises a plurality of photoelectric conversion areas and is positioned below the optical signal filtering module; the signal processing module is positioned inside the device; when the optical signal emitting module emits two different optical signals at the same time, the different optical signals are transmitted and reflected in the biological tissues of the user, are sequentially filtered and subjected to photoelectric conversion and then are converted into corresponding electric signals, and the blood oxygen parameter information of the user is obtained according to the electric signals; the two optical signal transmitting sub-modules are distributed on two sides of a central shaft of the optical signal filtering module. The module can improve the blood oxygen parameter detection precision.

Description

Blood oxygen parameter detection module and electronic equipment thereof

Technical Field

The embodiment of the application relates to the field of blood oxygen parameter detection, and more particularly, to a blood oxygen parameter detection module and an electronic device thereof.

Background

With the attention of people to personal health and the development of technology, various intelligent electronic products with blood oxygen parameter detection functions, such as an intelligent watch or a bracelet, appear in the market, and can be used for assisting in diagnosing the health conditions of a user, such as cardiovascular and cerebrovascular states.

Accordingly, there is a need for a blood oxygen parameter detection technique that can improve the detection accuracy.

Disclosure of Invention

The embodiment of the application provides a blood oxygen parameter detection module and electronic equipment thereof, the module with the electronic equipment can improve blood oxygen parameter detection precision.

The embodiment of the application provides a blood oxygen parameter detection module, which comprises an optical signal transmitting module and a blood oxygen parameter detection device; the optical signal transmitting module comprises a first optical signal transmitting submodule and a second optical signal transmitting submodule, wherein the first optical signal transmitting submodule is used for transmitting a first optical signal, and the second optical signal transmitting submodule is used for transmitting a second optical signal; the blood oxygen parameter detection device comprises an optical signal filtering module, a photoelectric conversion module and a signal processing module; the optical signal filtering module comprises at least two first filtering areas and at least two second filtering areas, wherein the first filtering areas and the second filtering areas are arranged in a crossed manner, and the wavelength ranges of the first filtering areas and the second filtering areas are different; the photoelectric conversion module comprises at least two first photoelectric conversion regions and at least two second photoelectric conversion regions, and is positioned below the optical signal filtering module; the signal processing module is positioned inside the blood oxygen parameter detection device and is electrically connected with the photoelectric conversion module; when the optical signal transmitting module simultaneously transmits a first optical signal and a second optical signal to biological tissues of a user, the first optical signal and the second optical signal are transmitted and reflected by the biological tissues of the user and then irradiate the optical signal filtering module, the first optical signal and the second optical signal are sequentially filtered by the optical signal filtering module and converted by the photoelectric conversion module and then are respectively converted into a first electric signal and a second electric signal, and the signal processing module processes the first electric signal and the second electric signal to obtain blood oxygen parameter information of the user; the first optical signal transmitting submodule and the second optical signal transmitting submodule are distributed on two sides of a central axis of the optical signal filtering module.

In the embodiment of the application, the first filtering area and the second filtering area of the optical signal filtering module are arranged in a cross manner, and the first optical signal transmitting submodule and the second optical signal transmitting submodule are distributed on two sides of the central axis of the optical signal filtering module, so that the coincidence degree of an effective path through which a first optical signal passes when the first optical signal is transmitted and reflected in the biological tissue of a user and an effective path through which a second optical signal passes when the second optical signal is transmitted and reflected in the biological tissue of the user can be improved, and the detection precision is improved.

Optionally, the optical signal filtering module is an optical filter or an optical thin film located above the photoelectric conversion module.

Optionally, the first filtering area and the second filtering area are distributed in an array. This solution is easier to implement.

Optionally, the optical signal filtering module includes two first filtering regions and two second filtering regions, the first filtering regions and the second filtering regions are the same in shape and rectangular, the first filtering regions and the second filtering regions are arranged in a 2 × 2 array, the two first filtering regions are distributed in a first diagonal direction, and the two second filtering regions are distributed in a second diagonal direction. The arrangement mode of the optical signal filtering modules is low in cost in process realization.

Optionally, the total area occupied by the first filtering region is equal to the total area occupied by the second filtering region.

Optionally, the optical signal filtering module includes two first filtering regions, two second filtering regions and a third filtering region, the optical signal filtering module is shaped as a first rectangle, the third filtering region is located in the center of the first rectangle and is represented in a structure of a central circle, the first filtering region and the second filtering region are each represented in a second rectangular structure with a corner cut by the central circle, the first filtering region and the second filtering region are arranged in a 2 × 2 array, and the first filtering region and the second filtering region together form a structure of the first rectangle with the central circle missing.

Alternatively, the photoelectric conversion module includes a photoelectric conversion array having a plurality of photoelectric conversion units, the photoelectric conversion array including at least two first photoelectric conversion regions and at least two second photoelectric conversion regions.

Optionally, the photoelectric conversion unit corresponding to the first photoelectric conversion region and the photoelectric conversion unit corresponding to the second photoelectric conversion region are different.

Alternatively, the photoelectric conversion unit corresponding to the first photoelectric conversion region and the photoelectric conversion unit corresponding to the second photoelectric conversion region are the same.

Alternatively, when the photoelectric conversion region is used to convert near-infrared light, the photoelectric conversion unit corresponding to the photoelectric conversion region is an AlGaAs-based photodiode or a Ge-based photodiode.

Through the optimal design of the photoelectric conversion units in different photoelectric conversion areas, the photoelectric conversion efficiency of each photoelectric conversion area on the received optical signal is higher, so that the amplitude of the electric signal received by the signal processing module is enhanced, and the detection precision is improved.

Optionally, a light blocking region is present between adjacent filtering regions, and the light blocking region is used for blocking crosstalk of light signals between adjacent photoelectric conversion regions, so as to improve detection accuracy.

Optionally, the light blocking region is a light barrier that is opaque to light.

Optionally, the light-blocking region is a wire mesh strip or an opaque polymeric adhesive layer or coating.

Optionally, the signal processing module includes a filtering sub-module, an analog-to-digital conversion sub-module, and a processing sub-module;

the filtering submodule is used for filtering the first electric signal and the second electric signal;

the analog-to-digital conversion sub-module is used for converting the first electric signal and the second electric signal which are filtered by the filtering sub-module into a first digital signal and a second digital signal;

and the processing sub-module is used for calculating and processing the first digital signal and the second digital signal to obtain the blood oxygen parameter information of the user.

Optionally, the signal processing module further includes an I/O interface sub-module, and the I/O interface sub-module is configured to receive and transmit data.

Optionally, the first light signal and the second light signal are any two of green light, red light and near-infrared light.

Optionally, the first optical signal transmitting sub-module and the second optical signal transmitting sub-module are symmetrically distributed on two sides of a central axis of the optical signal filtering module, and the arrangement mode can further improve the detection precision.

Optionally, the optical signal transmitting module further includes a third optical signal transmitting sub-module, and the third optical signal transmitting sub-module is configured to transmit a third optical signal.

Optionally, the third optical signal has the same wavelength as the first optical signal or the second optical signal.

Optionally, the third optical signal is different from both the first optical signal and the second optical signal in wavelength. And selecting the corresponding third optical signal according to different requirements.

The embodiment of the application provides electronic equipment, wherein the electronic equipment is worn on the body surface of a user and comprises any one of the blood oxygen parameter detection modules above the electronic equipment;

optionally, the electronic device further comprises a second set of optical signal emitting modules.

Optionally, the optical signal transmitting modules and the second group of optical signal transmitting modules are symmetrically distributed on two sides of the photoelectric conversion module. Through the arrangement mode, the physiological parameter information of the two detection areas of the biological tissue of the user can be detected to obtain two detection results, for example, the two detections can be averaged to obtain a more accurate detection result, or when the detection result of one detection area is not good, the detection result of the other detection area is selected as a measurement result.

Optionally, the optical signal emitting modules and the second group of optical signal emitting modules have different distances from the photoelectric conversion module. When detecting various physiological parameter information, the distances between different optical signal transmitting modules and the photoelectric conversion module can be optimally designed, so that a better detection result is obtained.

Optionally, the electronic device further includes a third group of optical signal emitting modules and a fourth group of optical signal emitting modules, where the optical signal emitting modules and the second group of optical signal emitting modules are symmetrically distributed on the left and right sides of the photoelectric conversion module, and the third group of optical signal emitting modules and the fourth group of optical signal emitting modules are symmetrically distributed on the upper and lower sides of the photoelectric conversion module.

Optionally, a first distance between the first group of optical signal emitting modules and the photoelectric conversion module is different from a second distance between the third group of optical signal emitting modules and the photoelectric conversion module.

Drawings

FIG. 1 is a schematic diagram of a blood oxygen parameter detecting module;

fig. 2 is a positional relationship diagram of the photoelectric conversion module and the optical signal emitting module shown in fig. 1 on a substrate;

FIG. 3a is a schematic structural diagram of the optical signal filtering module shown in FIG. 1;

FIG. 3b is a schematic structural diagram of the optical signal filtering module shown in FIG. 3a with an optical blocking region disposed between adjacent filtering regions;

FIG. 4a is a cross-sectional view of the optical-to-electrical conversion module and the optical signal filtering module above the optical-to-electrical conversion module shown in FIG. 3a, taken along the dotted line A-A';

FIG. 4B is a cross-sectional view of the photoelectric conversion module and the optical signal filtering module above the photoelectric conversion module shown in FIG. 3B, along the dotted line B-B';

FIG. 4c is another cross-sectional view of the photoelectric conversion module shown in FIG. 3B and the optical signal filtering module above the photoelectric conversion module, along the dotted line B-B';

fig. 5 is a schematic optical path diagram of an optical signal filtered by the optical signal filtering module and then incident into the photoelectric conversion module;

FIG. 6a is a schematic diagram of a signal processing module;

FIG. 6b is a schematic diagram of another signal processing module;

FIG. 7 is a diagram showing an arrangement of optical signal emitting modules and photoelectric conversion regions;

FIG. 8 is a timing diagram of the optical signal transmitting module transmitting the optical signal shown in FIG. 3 b;

FIG. 9 is a timing diagram of the optical signal transmitting module shown in FIG. 8;

fig. 10 is a diagram of an arrangement of two sets of optical signal emitting modules and photoelectric conversion modules of an electronic device;

fig. 11 is a diagram of an arrangement of four sets of optical signal emitting modules and photoelectric conversion modules of a parameter detection apparatus.

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Currently, the blood oxygen parameter information is obtained by detecting the ratio of oxyhemoglobin and deoxyhemoglobin in blood, and specifically, calculating the blood oxygen parameter information of the user by using different light absorption characteristics of oxyhemoglobin and deoxyhemoglobin. In an actual application scenario, two different optical signals are emitted into biological tissues of a user at different times, a first optical signal carries oxyhemoglobin information of the user after being absorbed by oxyhemoglobin in blood, a second optical signal carries deoxyhemoglobin information of the user after being absorbed by deoxyhemoglobin in blood, and blood oxygen parameter information of the user is obtained through calculation according to the first optical signal carrying the oxyhemoglobin information of the user and the second optical signal carrying the deoxyhemoglobin information of the user.

Exemplarily, the deoxyhemoglobin has a high absorption coefficient for red light (600 nm-800 nm), so that after the red light is emitted into the biological tissue of the user, the red light carries the information of the deoxyhemoglobin after being absorbed by the deoxyhemoglobin in the biological tissue of the user; the oxyhemoglobin has a high absorption coefficient for near infrared light (800 nm-1000 nm), the near infrared light is emitted into the biological tissue of the user, the near infrared light is absorbed by the oxyhemoglobin in the biological tissue of the user and carries oxyhemoglobin information, the near infrared light carrying the oxyhemoglobin information and the red light carrying the deoxyhemoglobin information are converted into corresponding electrical signals respectively, and calculation processing is performed according to the electrical signals to obtain the blood oxygen parameter information of the user.

The embodiment of the application improves the detection accuracy of the blood oxygen parameter by improving the coincidence ratio of the effective path (called as a first path) which is passed by the first optical signal when the first optical signal is transmitted and reflected in the biological tissue of the user and the effective path (called as a second path) which is passed by the second optical signal when the second optical signal is transmitted and reflected in the biological tissue of the user.

A schematic structural diagram of a blood oxygen parameter detecting module provided in an embodiment of the present application is shown in fig. 1, where the blood oxygen parameter detecting module may be disposed inside an electronic device. The blood oxygen parameter detecting module comprises a substrate 30, and an optical signal emitting module 300 and a blood oxygen parameter detecting device which are arranged on the substrate 30. The optical signal transmitting module 300 includes a first optical signal transmitting sub-module and a second optical signal transmitting sub-module, where the first optical signal transmitting sub-module is configured to transmit a first optical signal, the second optical signal transmitting sub-module is configured to transmit a second optical signal, and the wavelengths of the first optical signal and the second optical signal are different; the blood oxygen parameter detecting device comprises an optical signal filtering module 320, a photoelectric conversion module 310 and a signal processing module 330, and particularly, the blood oxygen parameter detecting device may be an integrated circuit with a blood oxygen parameter detecting function. The optical signal filtering module 320 includes at least two first filtering regions and at least two second filtering regions, the first filtering regions and the second filtering regions are arranged in a crossed manner, the wavelength range of the optical signal that can be transmitted by the first filtering regions is a first band, the wavelength range of the optical signal that can be transmitted by the second filtering regions is a second band, and the ranges of the first band and the second band are different, wherein the wavelength of the first optical signal is in the first band, and the wavelength of the second optical signal is in the second band; when the optical signal transmitting module transmits a first optical signal and a second optical signal to the biological tissue of the user at the same time, the first optical signal and the second optical signal are transmitted and reflected by the biological tissue of the user and then irradiate the optical signal filtering module 320, the first filtering area transmits the first optical signal to filter the second optical signal, and the second filtering area transmits the second optical signal to filter the first optical signal; the photoelectric conversion module 310 includes a photoelectric conversion array having a plurality of photoelectric conversion units, the photoelectric conversion array including at least two first photoelectric conversion regions for converting a first optical signal transmitted by the first filter region into a first electrical signal and at least two second photoelectric conversion regions for converting a second optical signal transmitted by the second filter region into a second electrical signal; the photoelectric conversion module 310 is located right below the optical signal filtering module 320, and more specifically, the first photoelectric conversion region is located right below the first filtering region, and the second photoelectric conversion region is located right below the second filtering region. The signal processing module 330 is located inside the blood oxygen parameter detecting device and electrically connected to the photoelectric conversion module 310, and the signal processing module 330 is configured to obtain blood oxygen parameter information of the user according to the first electrical signal and the second electrical signal. The first optical signal transmitting sub-module and the second optical signal transmitting sub-module are distributed on two sides of a central axis of the optical signal filtering module 320.

Illustratively, the optical signal filtering module 320 is an optical filter or an optical film located above the photoelectric conversion module 310.

Illustratively, the first and second light signals are any two of green light, red light, and near-infrared light.

In the embodiment of the present application, the first filtering region and the second filtering region of the optical signal filtering module 320 are arranged in a cross manner, and the first optical signal transmitting sub-module and the second optical signal transmitting sub-module are distributed on two sides of the central axis of the optical signal filtering module 320. Compared with the non-crossed arrangement mode of the first filtering region and the second filtering region, for example, the first filtering region is arranged on the left side, the second filtering region is arranged on the right side, and the crossed arrangement mode of the first filtering region and the second filtering region enables a first path (namely, an effective detection region corresponding to the first optical signal) through which the first optical signal received by the first photoelectric conversion region passes when being transmitted and reflected in the biological tissue of the user and a second path (namely, an effective detection region corresponding to the second optical signal) through which the second optical signal received by the second photoelectric conversion region passes when being transmitted and reflected in the biological tissue of the user to have higher coincidence degree, so that the detection accuracy is improved; compared with the arrangement mode that the first optical signal transmitting sub-module and the second optical signal transmitting sub-module are distributed on the same side of the central axis of the optical signal filtering module 320, the arrangement mode that the first optical signal transmitting sub-module and the second optical signal transmitting sub-module are distributed on the two sides of the central axis of the optical signal filtering module 320 enables the first path and the second path to have higher overlap ratio, and further improves the detection accuracy.

In addition, the optical signal transmitting module 300 can simultaneously transmit the first optical signal and the second optical signal, so that the difference between the first path and the second path due to the different time transmission of the first optical signal and the second optical signal can be reduced, and the detection accuracy is further improved.

Specifically, a positional relationship diagram of the photoelectric conversion module 310 and the optical signal emitting module 300 on the substrate 30 of the blood oxygen parameter detecting module is shown in fig. 2. The optical signal transmitting module 300 includes a first optical signal transmitting sub-module 301 and a second optical signal transmitting sub-module 302, and specifically, the first optical signal transmitting sub-module 301 may emit red light, and the second optical signal transmitting sub-module 302 may emit near-infrared light. The photoelectric conversion module 310 includes a photoelectric conversion array having a plurality of photoelectric conversion units, and particularly, the photoelectric conversion units may be photoelectric conversion diodes; the photoelectric conversion array may be divided into a plurality of photoelectric conversion regions, such as two red conversion regions and two near-infrared conversion regions, the red light conversion region and the near infrared light conversion region are the same in shape and are rectangular, the red light conversion region and the near infrared light conversion region are arranged into a 2 x 2 array, wherein the red light conversion region 311a and the red light conversion region 311b have a first diagonal distribution, the near infrared light conversion region 312a and the near infrared light conversion region 312b have a second diagonal distribution, and more particularly, in a virtual coordinate system based on the center of the photoelectric conversion array, the near-infrared light conversion region 312a and the near-infrared light conversion region 312b may be located in a first quadrant and a third quadrant of the virtual coordinate system, and the red light conversion region 311a and the red light conversion region 311b are located in the second quadrant and the fourth quadrant of the virtual coordinate system.

The red light conversion region 311a and the red light conversion region 311b are used to convert the received red light into a first electrical signal, the near infrared light conversion region 312a and the near infrared light conversion region 312b are used to convert the received near infrared light into a second electrical signal, the red light received by the red light conversion region 311a and the red light conversion region 311b is a red light signal carrying first blood oxygen parameter information of the living tissue, which is formed by the red light emitted by the first light signal emission sub-module 301 after being transmitted and reflected in the living tissue, and the near infrared light received by the near infrared light conversion region 312a and the near infrared light conversion region 312b is a near infrared light signal carrying second blood oxygen parameter information of the living tissue, which is formed by the near infrared light emitted by the second light signal emission sub-module 302 after being transmitted and reflected in the living tissue.

Each photoelectric conversion region may be electrically connected to the substrate 30 through its corresponding lead unit, for example, in the embodiment shown in fig. 2, the red light conversion region 311a corresponds to the lead unit 313a and the lead unit 313b, the red light conversion region 311b corresponds to the lead unit 315a and the lead unit 315b, the near infrared light conversion region 312a corresponds to the lead unit 316a and the lead unit 316b, and the near infrared light conversion region 312b corresponds to the lead unit 314a and the lead unit 314 b.

The first optical signal transmitting sub-module 301 and the second optical signal transmitting sub-module 302 of the optical signal transmitting module 300 are distributed on two sides of a central axis of a rectangle surrounded by the photoelectric conversion regions of the photoelectric conversion module 310, more specifically, in a virtual coordinate system based on the center of the photoelectric conversion array, the near infrared light conversion region 312a and the near infrared light conversion region 312b are located in a first quadrant and a third quadrant of the virtual coordinate system, the red light conversion region 311a and the red light conversion region 311b are located in a second quadrant and a fourth quadrant of the virtual coordinate system, and the first optical signal transmitting sub-module 301 and the second optical signal transmitting sub-module 302 are distributed on two sides of any one coordinate axis of the virtual coordinate system.

In the embodiment of the present application, the optical signal filtering module 320 is disposed right above the photoelectric conversion module 310, so that different photoelectric conversion regions can simultaneously convert different optical signals, and the arrangement manner of the cross arrangement of the different filtering regions of the optical signal filtering module 320 improves the overlapping degree of effective transmission paths in the biological tissue of the user, corresponding to the first optical signal transmitting sub-module 301 and the second optical signal transmitting sub-module 302, respectively, so as to improve the detection accuracy. The structure of the optical signal filtering module 320 is schematically shown in fig. 3 a. The optical signal filtering module 320 includes at least two first filtering regions and at least two second filtering regions, and specifically, the optical signal filtering module 320 includes two red light filtering regions 411a and 411b and two near infrared light filtering regions 412a and 412 b. The red light filtering regions 411a and 411b can transmit red light to filter out light of other bands except for red light, and the near infrared light filtering regions 412a and 412b can transmit near infrared light to filter out light of other bands except for near infrared light; the optical signal filtering module 320 is located right above the photoelectric conversion module 310, has the same shape as the photoelectric conversion module 310, wherein the red light filtering region 411a corresponds to the red light converting region 311a, the red light filtering region 411b corresponds to the red light converting region 311b, the near infrared light filtering region 412a corresponds to the near infrared light converting region 312a, and the near infrared light filtering region 412b corresponds to the near infrared light converting region 312b, specifically, the red light filtering regions 411a and 411b and the near infrared light filtering regions 412a and 412b have the same shape and are rectangles, the red light filtering regions 411a and 411b and the near infrared light filtering regions 412a and 412b are arranged in a 2 x 2 array, wherein the red light filtering area 411a and the red light filtering area 411b are distributed in a first diagonal, and the near infrared light filtering area 412a and the near infrared light filtering area 412b are distributed in a second diagonal.

When the red light and the near-infrared light simultaneously emitted by the optical signal emitting module 300 are transmitted and reflected in the biological tissue of the user and then enter the optical signal filtering module 320, the red light filtering region filters the near-infrared light and transmits the red light, the near-infrared light filtering region filters the red light and transmits the near-infrared light, accordingly, the red light conversion region receives the red light and converts the red light into a first electrical signal, the near-infrared light conversion region receives the near-infrared light and converts the red light into a second electrical signal, the signal processing module performs calculation processing according to the first electrical signal and the second electrical signal to obtain information carried by the red light and the near-infrared light respectively, and further calculates and obtains biological parameter information of the user.

In the present embodiment, the effective propagation path of the red light emitted by the first optical signal emission sub-module 301 in the biological tissue of the user is the propagation path of the red light signal component in the biological tissue of the user, which is finally converted by the red light conversion region 311a and the red light conversion region 311b, and is referred to as a first path; similarly, the effective propagation path of the near-infrared light emitted by the second optical signal emission sub-module 302 in the biological tissue of the user is a propagation path of the near-infrared light signal component finally converted by the near-infrared light conversion region 312a and the near-infrared light conversion region 312b in the biological tissue of the user, which is referred to as a second path.

In the photoelectric conversion module of the embodiment of the present application, the different photoelectric conversion regions are arranged in a cross distribution manner, so that the coincidence degree between the first path and the second path is higher, and thus the detection accuracy is improved, compared to an arrangement manner in which the photoelectric conversion regions of the photoelectric conversion module are not arranged in a cross distribution manner (for example, the photoelectric conversion region 311a and the photoelectric conversion region 312a are both red light conversion regions, and the photoelectric conversion region 311b and the photoelectric conversion region 312b are both near infrared light conversion regions); and the first optical signal transmitting sub-module 301 and the second optical signal transmitting sub-module 302 are located on two sides of the central axis of the rectangle formed by the photoelectric conversion module 310, which will improve the coincidence degree between the first path and the second path, thereby further improving the detection accuracy.

As a preferred embodiment, the first optical signal transmitting sub-module 301 and the second optical signal transmitting sub-module 302 of the optical signal transmitting module 300 are symmetrically distributed on two sides of a central axis of a rectangle surrounded by the photoelectric conversion regions of the photoelectric conversion module 310. Under the condition that the distance between the first optical signal transmitting sub-module 301 and the second optical signal transmitting sub-module 302 is not changed, the arrangement manner that the first optical signal transmitting sub-module 301 and the second optical signal transmitting sub-module 302 of the optical signal transmitting module 300 are symmetrically distributed on two sides of the central axis of the rectangle surrounded by the photoelectric conversion region of the photoelectric conversion module 310 enables the coincidence degree of the first path corresponding to the red light and the second path corresponding to the near-infrared light to be maximum, and the detection precision is improved.

As a possible implementation manner, a cross-sectional view of the optical signal filtering module 320 and the underlying photoelectric conversion module 310 (not shown in fig. 3 a) along the dotted line a-a' is shown in fig. 4 a. The optical signal filtering module 320 and the photoelectric conversion module 310 are located on different layers of the same integrated circuit, and the optical signal filtering module 320 is located above the photoelectric conversion module 310. Specifically, the photoelectric conversion module includes a silicon substrate 318, and red light photoelectric conversion regions 311a and 311b and near infrared light photoelectric conversion regions 312a and 312b provided on the silicon substrate 318. The signal filtering module 320 is located right above the photoelectric conversion module 310, and specifically, the signal filtering module 320 includes red light filtering regions 411a and 411b and near-infrared light filtering regions 412a and 412b, the red light filtering regions 411a and 411b correspond to the red light converting regions 311a and 311b, respectively, and the near-infrared light filtering regions 412a and 412b correspond to the near-infrared light photoelectric conversion regions 312a and 312b, respectively.

Illustratively, the optical path of the first optical signal and the second optical signal simultaneously emitted by the optical signal emitting module 300 after being transmitted and reflected in the biological tissue of the user is incident to the optical signal filtering module 320, and after being filtered by the optical signal filtering module 320, the optical signal is incident to the photoelectric conversion module 310 is schematically shown in fig. 5. In an actual application scenario, firstly, the optical signal emitting module 300 emits red light and near-infrared light simultaneously, the red light and the near-infrared light are transmitted and reflected in a biological tissue (e.g., a wrist, etc.) and then irradiate to each filtering region of the optical signal filtering module 320, the intensity of the red light irradiated to the near-infrared light filtering region 412b is red light 520a, the intensity of the near-infrared light irradiated to the near-infrared light filtering region 412b is near-infrared light 510a, the near-infrared light filtering region 412b filters the red light 520a and transmits the near-infrared light 510a, and the near-infrared light 510a transmitted through the near-infrared light filtering region 412b is converted into a first electrical signal by the near-infrared light converting region 312 b; similarly, the intensity of the red light irradiated to the red light filtering region 411b is the red light 520b, the intensity of the near-infrared light irradiated to the infrared light filtering region 411b is the near-infrared light 510b, the red light filtering region 412b filters the near-infrared light 520b and transmits the red light 510b, and the red light 510b transmitted through the red light filtering region 411b is converted into the second electrical signal by the red light converting region 311 b. It should be noted that the present embodiment is drawn separately for the convenience of illustration, and in practice, the red light and the near infrared light should be mixed together.

The signal processing module 330 obtains the blood oxygen parameter information of the user after calculation processing according to the first electrical signal and the second electrical signal.

Since there is optical signal crosstalk between adjacent photoelectric conversion regions, such optical signal crosstalk will reduce detection accuracy. Light blocking regions can be arranged between adjacent filtering regions of the optical signal filtering module above the photoelectric conversion module, so that optical signal crosstalk between different photoelectric conversion regions is reduced, and detection precision is further improved. The light blocking region can be an opaque light blocking object, such as a wire mesh metal strip or an opaque polymer adhesive layer or coating, and can also be used for depositing a blocking material in the cavity through a micro-nano process, wherein the blocking material can be a polysilazane material.

As shown in fig. 3a, a schematic structural diagram of an optical blocking region disposed between adjacent filtering regions of an optical signal filtering module is shown in fig. 3b, where the optical signal filtering module includes an optical blocking region 319, and the optical blocking region is used to reduce optical signal crosstalk between adjacent optical-to-electrical conversion regions of the optical-to-electrical conversion module 310 below the optical signal filtering module 320. Specifically, a cross-sectional view of the optical signal filtering module shown in fig. 3B and the photoelectric conversion module (not shown in fig. 3B) therebelow along a dotted line B-B' is shown in fig. 4B. The photoelectric conversion module 310 and the optical signal filtering module 320 are located on different layers of the same integrated circuit, and the optical signal filtering module 320 is located above the photoelectric conversion module 310. A light blocking region 319 is disposed between adjacent filtering regions of the optical signal filtering module 320, and for example, the light blocking region 319 is formed by depositing a blocking material, which may be a polysilazane material, in a groove between the adjacent filtering regions through a micro-nano process. Specifically, a light blocking region is disposed between the red light filtering region 411a and the near-infrared light filtering region 412a, a light blocking region is disposed between the red light filtering region 411b and the near-infrared light filtering region 412b, a light blocking region is disposed between the red light filtering region 411a and the near-infrared light filtering region 412b, and a light blocking region is disposed between the red light filtering region 411b and the near-infrared light filtering region 412 a. The light blocking regions are arranged between the adjacent filtering regions of the light signal filtering module, so that the light signal crosstalk between different photoelectric conversion regions is reduced, and the detection precision is improved.

As an alternative embodiment, a cross-sectional view of the optical signal filtering module shown in fig. 3B and the photoelectric conversion module (not shown in fig. 3B) therebelow along the dotted line B-B' is shown in fig. 4 c. The photoelectric conversion module 310 includes a silicon substrate 318, and red light conversion regions 311a and 311b and near infrared light conversion regions 312a and 312b disposed on the silicon substrate 318, and is a photo-sensing layer for photoelectric conversion in an integrated circuit. The optical signal filtering module 320 is located outside the integrated circuit, and the optical signal filtering module 320 is located above the photoelectric conversion module 310. The optical signal filtering module includes an optically transmissive substrate 413, and red light filtering regions 411a and 411b, near infrared light filtering regions 412a and 412b, and a light blocking region 319 adhered to the optically transmissive substrate 413, where the light blocking region 319 is disposed between adjacent filtering regions, and for example, the optically transmissive substrate 413 may be glass or a polymer material. The thickness of the light blocking partition 319 is greater than the thickness of the filter region, and illustratively, the top end of the light blocking partition 319 is adhered to the optically transmissive substrate 413, and the bottom end of the light blocking partition 319 is adhered to the silicon substrate 318 of the photoelectric conversion module. The optically transmissive substrate 413 is adhered above the photoelectric conversion module 310 by a support frame 414, and a side of the optically transmissive substrate 413 to which the filter region is adhered faces the photoelectric conversion module 310 and forms a certain free space, and the optically transmissive substrate 413 can protect the filter region.

The thickness of the light blocking region 319 is greater than that of the filtering region, which is more beneficial to reducing the mutual crosstalk between the light signals transmitted by the adjacent filtering regions in the process of irradiating the corresponding photoelectric conversion regions, thereby improving the detection precision.

In order to further improve the detection precision, different photoelectric conversion units can be adopted in different photoelectric conversion areas to improve the photoelectric conversion efficiency of the different photoelectric conversion areas to the received optical signals, so that the amplitude of the electric signals received by the signal processing module is increased, and the detection precision is further improved.

The photoelectric conversion module includes a photoelectric conversion array having a plurality of photoelectric conversion units, the photoelectric conversion array including at least two first photoelectric conversion regions and at least two second photoelectric conversion regions, optical signals converted by the first photoelectric conversion regions and the second photoelectric conversion regions being different. In order to enable different photoelectric conversion areas to have higher photoelectric conversion efficiency on received optical signals, the different photoelectric conversion areas are respectively optimally designed, and different photoelectric conversion units are used in the different photoelectric conversion areas. For example, referring to the photoelectric conversion module shown in fig. 3a, the light signals converted by the red light conversion region 411a and the red light conversion region 411b are red light, the light signals converted by the near-infrared light conversion region 412a and the near-infrared light conversion region 412b are near-infrared light, and since the AlGaAs-based photodiode or the Ge-based photodiode has high photoelectric conversion efficiency for both red light and near-infrared light, the photoelectric conversion unit constituting the red light conversion region may be an AlGaAs-based photodiode or a Ge-based photodiode, the photoelectric conversion unit constituting the near-infrared light conversion region may be an AlGaAs-based photodiode or a Ge-based photodiode, and the rest may be similar. Through the optimal design of the photoelectric conversion units in different photoelectric conversion areas, each photoelectric conversion area has higher photoelectric conversion efficiency on the received optical signal, so that the amplitude of the electric signal received by the signal processing module is enhanced, and the detection precision is improved.

As a possible implementation manner, as shown in fig. 6a, a schematic structural diagram of a signal processing module is provided. The signal processing module comprises a filtering submodule 901, an analog-to-digital conversion submodule 902 and a processing submodule 903. When the photoelectric conversion module converts the optical signal, which is reflected and transmitted by the organism of the user and then filtered by the optical signal filtering module, into a corresponding electrical signal, the filtering submodule 901 filters the electrical signal to remove interferences such as noise, the filtered electrical signal is converted into a digital signal by the analog-to-digital conversion submodule 902, and the processing submodule 903 receives the digital signal and then performs operation processing on the digital signal to obtain the blood oxygen parameter information of the user.

Optionally, the processing sub-module may be further configured to control the transmission state of the optical signal transmitting module.

As another possible implementation, as shown in fig. 6b, a schematic structural diagram of a signal processing module is provided. The signal processing module comprises a filtering sub-module 911, an analog-to-digital conversion sub-module 912, a processing storage sub-module 913 and an I/O interface sub-module 914. When the photoelectric conversion module converts the optical signal, which is transmitted and reflected in the biological tissue of the user and then filtered by the optical signal filtering module, into a corresponding electrical signal, the filtering submodule 911 filters the electrical signal to remove the interference such as noise; the filtered electrical signal is converted into a digital signal by the analog-to-digital conversion sub-module 912, the digital signal is calculated and stored by the processing and storing sub-module 913 after being received by the processing and storing sub-module, the digital signal or the operation result can be sent to an external system or an external function module through the I/O interface sub-module 914 for interaction, and similarly, the I/O interface sub-module 914 can also receive data from the external system or the external function module, thereby realizing bidirectional interaction with the external system or the external function module.

Optionally, the processing and storing sub-module can also be used for controlling the transmitting state of the optical signal transmitting module.

The embodiment of the application provides another electronic device. The electronic equipment comprises an optical signal transmitting module and a blood oxygen parameter detecting device, wherein the blood oxygen parameter detecting device comprises an optical signal filtering module, a photoelectric conversion module and a signal processing module. The optical signal transmitting module can simultaneously transmit a first optical signal, a second optical signal and a third optical signal, wherein the wavelengths of the first optical signal, the second optical signal and the third optical signal are different; the optical signal filtering module comprises at least two first filtering areas, at least two second filtering areas and at least two third filtering areas, wherein the wavelength range of optical signals which are permeable to the first filtering areas is a first waveband, the wavelength range of optical signals which are permeable to the second filtering areas is a second waveband, the wavelength range of optical signals which are permeable to the third filtering areas is a third waveband, the ranges of the first waveband, the second waveband and the third waveband are different, the first optical signals are in the first waveband, the second optical signals are in the second waveband, and the third optical signals are in the third waveband; when a first optical signal, a second optical signal and a third optical signal simultaneously emitted by the optical signal emitting module are transmitted and reflected in a biological tissue of a user and then enter the optical signal filtering module, the first filtering area filters the second optical signal and the third optical signal to transmit the first optical signal, the second filtering area filters the first optical signal and the third optical signal to transmit the second optical signal, and the third filtering area filters the first optical signal and the second optical signal to transmit the third optical signal; the photoelectric conversion module comprises a photoelectric conversion array with a plurality of photoelectric conversion units, wherein the photoelectric conversion array comprises at least two first photoelectric conversion regions, at least two second photoelectric conversion regions and at least two third photoelectric conversion regions, the first photoelectric conversion regions are used for converting first optical signals transmitted by the first filtering regions into first electric signals, the second photoelectric conversion regions are used for converting second optical signals transmitted by the second filtering regions into second electric signals, and the third photoelectric conversion regions are used for converting third optical signals transmitted by the third filtering regions into third electric signals; the photoelectric conversion module is connected with the signal processing module, and the signal processing module is used for processing according to the first electric signal, the second electric signal and the third electric signal to obtain blood oxygen parameter information of the user.

The electronic equipment of the embodiment of the application is provided with the optical signal filtering modules with the three filtering areas above the photoelectric conversion module, and the wave bands of the optical signals of the optical signal filtering modules, which are permeable to different filtering areas, are different, so that three different optical signals simultaneously emitted by the optical signal emitting module can be respectively converted into corresponding electric signals in different areas on the same photoelectric conversion module after being transmitted and reflected in the organism tissue of a user, and the effects of reducing the test time and improving the detection precision are achieved.

Fig. 7 shows an arrangement relationship between the optical signal emitting module and the photoelectric conversion region according to an embodiment of the present application. The optical signal emitting module 610 includes a first optical signal emitting sub-module 611, a second optical signal emitting sub-module 612, and a third optical signal emitting sub-module 613, specifically, the first optical signal emitting sub-module 611 is a red light emitting diode, the second optical signal emitting sub-module 612 is a near-infrared light emitting diode, the third optical signal emitting sub-module 613 is a green light emitting diode, and the third optical signal emitting sub-module 613 is closer to the photoelectric conversion module than the first optical signal emitting sub-module 611 and the second optical signal emitting sub-module 612;

the photoelectric conversion module 620 includes at least two first filtering regions, at least two second filtering regions, and at least two third filtering regions, and particularly, the photoelectric conversion module 620 includes red light conversion regions 621a and 621b, near infrared light conversion regions 622a and 622b, and a green light conversion region 623; the photoelectric conversion module 620 is in a first rectangular structure including a central circle, wherein the green light conversion region 623 is located at the center of the first rectangle and is in a central circle structure; the red light conversion regions 621a and 621b and the near-infrared light conversion regions 622a and 622b are identical in shape and each have a second rectangular structure with a corner cut off by the central circle, and the red light conversion regions 621a and 621b and the near-infrared light conversion regions 622a and 622b are arranged in a 2 × 2 array to form a first rectangular structure with a missing central circle.

The red light conversion region is configured to convert the received red light into a first electrical signal, the near-infrared light conversion region is configured to convert the received near-infrared light into a second electrical signal, the green light conversion region is configured to convert the received green light into a third electrical signal, specifically, the red light received by the red light conversion regions 621a and 621b is a red light signal carrying first physiological parameter information of the biological tissue and formed by the red light emitted by the first light signal emission sub-module 611 after being transmitted and reflected in the biological tissue, the near-infrared light received by the near-infrared light conversion regions 622a and 622b is a near-infrared light signal carrying second physiological parameter information of the biological tissue and formed by the near-infrared light emitted by the second light signal emission sub-module 612 after being transmitted and reflected in the biological tissue, and the green light received by the green light conversion region 623 is a green light emitted by the third light signal emission sub-module 613 and passed through the biological tissue And a green light signal which is formed after transmission and reflection in the object tissue and carries the information of the third physiological parameter of the organism tissue.

Correspondingly, the optical signal filtering module above the photoelectric conversion module has the same shape as the photoelectric conversion module, a red light filtering area corresponds to the red light conversion area, a near infrared light filtering area corresponds to the near infrared light conversion area, and a green light filtering area corresponds to the green light conversion area.

Generally speaking, the light signals used for detecting the blood oxygen parameter information are red light and near infrared light, and the light signals used for detecting the heart rate information are green light, so that the embodiment of the application is suitable for scenes capable of detecting the blood oxygen parameter information and the heart rate information simultaneously.

Due to the selective filtering action of different filtering areas of the optical signal filtering module, the optical signal transmitting module can simultaneously transmit red light, near-infrared light and green light, and the red light, the near-infrared light and the green light can be respectively converted into corresponding electric signals by different areas on the same photoelectric conversion module after being transmitted and reflected in the organism tissues of a user, so that the testing time is reduced, and the detection precision of blood oxygen parameters is improved.

It should be noted that the first optical signal, the second optical signal, and the third optical signal may also be optical signals with other wavelengths to meet various detection requirements.

In addition, according to the blood oxygen parameter information and the detection characteristics of the heart rate information, the green light emitting diode needs to be closer to the photoelectric conversion module than the red light emitting diode and the near infrared light emitting diode, so that the third optical signal transmitting sub-module 613 can obtain a more accurate heart rate measurement result than the arrangement manner that the first optical signal transmitting sub-module 611 and the second optical signal transmitting sub-module 612 are closer to the photoelectric conversion module.

In addition, when detecting the blood oxygen parameter information, the higher the coincidence degree of the first path (i.e., the first detection region) through which the red light is transmitted in the biological tissue of the user and the second path (i.e., the second detection region) through which the near-infrared light is transmitted in the biological tissue of the user, the better. Compared with the arrangement mode that the red light conversion regions and the near infrared light conversion regions are distributed in a crossed manner (correspondingly, the red light filtering regions and the near infrared light filtering regions are distributed in a crossed manner), the arrangement mode that the red light conversion regions and the near infrared light conversion regions are distributed in a non-crossed manner (for example, two red light conversion regions are both positioned on the upper half part of the photoelectric conversion module, and two near infrared light conversion regions are both positioned on the lower half part of the photoelectric conversion module), so that the coincidence degree between the first detection region and the second detection region is higher, and a more accurate detection result is obtained.

As a preferred embodiment, the total area of the red light conversion regions and the total area of the near infrared light conversion regions are the same. The total areas of the red light conversion area and the near infrared light conversion area are the same, so that the functions of simplifying calculation and the like can be achieved, and the detection of blood oxygen parameter information is more convenient.

As a preferred embodiment, the first optical signal emitting sub-module 611 and the second optical signal emitting sub-module 612 are located on two sides of the central axis of the shape of the photoelectric conversion module 620, so as to improve the coincidence degree of the first path through which the red light emitted by the first optical signal emitting sub-module 611 propagates in the biological tissue of the user and the second path through which the near infrared light emitted by the second optical signal emitting sub-module 612 propagates in the biological tissue of the user, so that the detection result of the blood oxygen parameter is more accurate.

In addition to the above beneficial effects, when there are three optical signal transmitting sub-modules, the optical signal transmitted by one of the optical signal transmitting sub-modules can be used as a reference signal to implement filtering of the rest of the optical signals, and the beneficial effects are not limited by the arrangement of the optical signal transmitting sub-modules and the distribution of different filtering areas on the optical signal filtering module. As a possible operation flow, the third optical signal emission submodule firstly emits the third optical signal, at this time, neither the first optical signal emission submodule nor the second optical signal emission submodule emits the optical signal, the photoelectric conversion module converts the third optical signal into the third electrical signal, and the signal processing module performs fourier transform on the third electrical signal to obtain the frequency spectrum of the third electrical signal. And then the first optical signal transmitting submodule and the second optical signal transmitting submodule simultaneously transmit a first optical signal and a second optical signal, the first optical signal and the second optical signal are respectively converted into a corresponding first electric signal and a corresponding second electric signal by different areas of the photoelectric conversion module, and the first electric signal and the second electric signal are processed by the signal processing module to obtain respective corresponding frequency spectrums. The third electrical signal is spurious for the first electrical signal and the second electrical signal because the frequency spectrums of the first electrical signal, the second electrical signal, and the third electrical signal are all different. The signal processing module can remove the frequency component of the third electrical signal from the first electrical signal and the second electrical signal according to the frequency spectrum of the third electrical signal obtained in advance, namely, the first electrical signal and the second electrical signal are filtered, so that more accurate detection is realized.

It is noted that in some application scenarios, the third optical signal may be the same wavelength as the first optical signal or the second optical signal.

As a preferred embodiment, different photoelectric conversion units may be used in different photoelectric conversion regions to improve the photoelectric conversion efficiency of the different photoelectric conversion regions for the received optical signal, and the photoelectric conversion units in the first photoelectric conversion region, the second photoelectric conversion region, and the third photoelectric conversion region are optimally designed, so as to increase the amplitude of the electrical signal received by the signal processing module, and further improve the detection accuracy.

In an embodiment of the present application, as shown in fig. 8, a timing diagram of the optical signal transmitting module 300 shown in fig. 2 is provided. The optical signal transmitting module 300 includes a first optical signal transmitting sub-module 301 and a second optical signal transmitting sub-module 302, and since the optical signal filtering module 320 includes a plurality of different filtering regions, a first optical signal and a second optical signal simultaneously transmitted by the first optical signal transmitting sub-module 301 and the second optical signal transmitting sub-module 302 can be converted into corresponding electrical signals in different optical-to-electrical conversion regions of the optical-to-electrical conversion module 310 after being filtered by the optical signal filtering module 320. As shown in fig. 8, the optical signal transmitting module simultaneously transmits a first optical signal and a second optical signal, where both the first optical signal and the second optical signal are periodic signals.

In an embodiment of the present application, as shown in fig. 9, a timing diagram of the optical signal emitting module emitting the optical signal shown in fig. 7 is provided. The optical signal transmitting module 610 includes a first optical signal transmitting sub-module 611, a second optical signal transmitting sub-module 612, and a third optical signal transmitting sub-module 613. When there are three optical signal transmitting sub-modules, the optical signal transmitted by one of the optical signal transmitting sub-modules can be used as a reference signal, and used as a reference for filtering the rest of the optical signals. In the embodiment of the present application, the third optical signal emitted by the third optical signal emitting sub-module 613 is used as the reference signal. When t = t1, the third optical signal emission submodule 613 emits a third optical signal, at this time, the first optical signal emission submodule 611 and the second optical signal emission submodule 612 do not emit an optical signal, the third optical signal is filtered by the optical signal filtering module and then converted into a third electrical signal by the third photoelectric conversion region, the third electrical signal is transmitted to the signal processing module, and the signal processing module performs fourier transform on the third electrical signal to obtain a frequency spectrum of the third electrical signal. When t = t2, the first optical signal transmitting sub-module 611 and the second optical signal transmitting sub-module 612 simultaneously transmit the first optical signal and the second optical signal, and after being filtered by the optical signal filtering module, the first optical signal transmitting sub-module and the second optical signal transmitting sub-module are respectively converted into a first electrical signal and a second electrical signal by the first photoelectric conversion region and the second photoelectric conversion region. Since the frequency spectra of the three electrical signals are not the same, the third electrical signal is spurious for the first electrical signal and the second electrical signal. According to the spectrum of the third electric signal obtained in advance, the frequency component of the third electric signal can be removed from the first electric signal and the second electric signal, namely the first electric signal and the second electric signal are filtered, so that more accurate detection is realized.

In another embodiment of the present application, an arrangement of two sets of optical signal emitting modules and photoelectric conversion modules of an electronic device is provided. As shown in fig. 10, a second group of optical signal transmitting modules 730 is added to the electronic device shown in fig. 7, and the second group of optical signal transmitting modules 730 includes a fourth optical signal transmitting sub-module 731, a fifth optical signal transmitting sub-module 732 and a sixth optical signal transmitting sub-module 733. The second group of optical signal transmitting modules 730 and the first group of optical signal transmitting modules 710 are distributed at different positions, and the distances from the second group of optical signal transmitting modules and the first group of optical signal transmitting modules to the optical signal filtering module are different.

In some application scenarios, a plurality of blood oxygen parameter information of a user needs to be detected, for example, a perfusion index and a blood oxygen saturation level need to be detected simultaneously, and detection characteristics of the perfusion index and the blood oxygen saturation level are different, the closer the signal emitted for detecting the blood oxygen saturation level is to the photoelectric conversion module, the better the signal emitted for detecting the perfusion index is, the farther the signal is, the better the signal is. Therefore, in fig. 10, for blood oxygen detection, the first optical signal transmitting submodule 711 and the second optical signal transmitting submodule 712 which are far away from the photoelectric conversion module 720 can be used for detecting a blood perfusion index, and the fourth optical signal transmitting submodule 731 and the fifth optical signal transmitting submodule 732 which are near to the photoelectric conversion module 720 can be used for detecting a blood oxygen saturation level, so that both the perfusion index and the blood oxygen saturation level of a user can obtain a more accurate detection result.

As a possible design, the second group of optical signal transmitting modules 730 and the first group of optical signal transmitting modules 710 are symmetrically distributed on two sides of the optical-to-electrical conversion module. Through the arrangement mode, the electronic device detects the blood oxygen parameter information of two detection areas of the biological tissue of the user, for example, firstly, the first group of optical signal emission module and the blood oxygen parameter detection device are used for detecting the blood oxygen concentration information to obtain a first detection result, then, the second group of optical signal emission module and the blood oxygen parameter detection device are used for measuring the blood oxygen concentration information to obtain a second detection result, and then, the average value of the first measurement result and the second measurement result is calculated, so that a more accurate detection result is obtained. In addition, when the detection result of one detection region is poor, the detection result of another detection region may be selected as the measurement result.

As an alternative embodiment, the first group of optical signal transmitting modules 710 and the second group of optical signal transmitting modules 730 each include only two optical signal transmitting submodules, and this design layout is suitable for application scenarios such as bracelets.

In another embodiment of the present application, an arrangement of four sets of optical signal emitting modules and photoelectric conversion modules of a parameter detection device is provided. As shown in fig. 11, a third set of optical signal transmitting module 740 and a fourth set of optical signal transmitting module 750 are added to the electronic device shown in fig. 10, the third set of optical signal transmitting module 740 includes a seventh optical signal transmitting sub-module 741, an eighth optical signal transmitting sub-module 742 and a ninth optical signal transmitting sub-module 743, and the fourth set of optical signal transmitting module 750 includes a tenth optical signal transmitting sub-module 751, an eleventh optical signal transmitting sub-module 752 and a twelfth optical signal transmitting sub-module 753. The first group of optical signal transmitting modules 710 and the second group of optical signal transmitting modules 730 are symmetrically distributed on the left and right sides of the photoelectric conversion module, and the third group of optical signal transmitting modules 740 and the fourth group of optical signal transmitting modules 750 are symmetrically distributed on the upper and lower sides of the photoelectric conversion module. The distances between the first group of optical signal emitting modules and the third group of optical signal emitting modules and the photoelectric conversion module are different.

In some application scenarios, the electronic device needs to detect various blood oxygen parameter information, such as a perfusion index and a blood oxygen saturation level, the first group 710 and the second group 730 of optical signal emitting modules, which are far away from the photoelectric conversion module 720, may be used to detect the blood perfusion index, and the third group 740 and the fourth group 750 of optical signal emitting modules, which are near to the photoelectric conversion module 720, may be used to detect the blood oxygen saturation level. Meanwhile, since the first group of optical signal emitting modules 710 and the second group of optical signal emitting modules 730 are symmetrically distributed with respect to the photoelectric conversion module 720, and the third group of optical signal emitting modules 740 and the fourth group of optical signal emitting modules 750 are symmetrically distributed with respect to the photoelectric conversion module 720, the perfusion index and the blood oxygen saturation can both obtain more accurate detection results. The embodiment of the application is suitable for electronic products such as watches and the like with large areas.

It should be noted that, without conflict, the embodiments and/or technical features in the embodiments described in the present application may be arbitrarily combined with each other, and the technical solutions obtained after the combination also fall within the protection scope of the present application.

It should be understood that the specific examples in the embodiments of the present application are for the purpose of promoting a better understanding of the embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and that various modifications and variations can be made by those skilled in the art based on the above embodiments and fall within the scope of the present application.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (26)

1. A blood oxygen parameter detection module is characterized in that the blood oxygen parameter detection module comprises an optical signal transmitting module and a blood oxygen parameter detection device;

the optical signal transmitting module comprises a first optical signal transmitting submodule and a second optical signal transmitting submodule, wherein the first optical signal transmitting submodule is used for transmitting a first optical signal, and the second optical signal transmitting submodule is used for transmitting a second optical signal;

the blood oxygen parameter detection device comprises an optical signal filtering module, a photoelectric conversion module and a signal processing module;

the optical signal filtering module comprises at least two first filtering areas and at least two second filtering areas, wherein the first filtering areas and the second filtering areas are arranged in a crossed manner, and the wavelength ranges of the first filtering areas and the second filtering areas are different;

the photoelectric conversion module comprises at least two first photoelectric conversion regions and at least two second photoelectric conversion regions, and is positioned below the optical signal filtering module;

the signal processing module is positioned inside the blood oxygen parameter detection device and is electrically connected with the photoelectric conversion module;

when the optical signal transmitting module simultaneously transmits a first optical signal and a second optical signal to biological tissues of a user, the first optical signal and the second optical signal are transmitted and reflected by the biological tissues of the user and then irradiate the optical signal filtering module, the first optical signal and the second optical signal are sequentially filtered by the optical signal filtering module and converted by the photoelectric conversion module and then are respectively converted into a first electric signal and a second electric signal, and the signal processing module processes the first electric signal and the second electric signal to obtain blood oxygen parameter information of the user;

the first optical signal transmitting submodule and the second optical signal transmitting submodule are distributed on two sides of a central axis of the optical signal filtering module.

2. The blood oxygen parameter detection module set of claim 1, wherein the optical signal filtering module is an optical filter or an optical film disposed above the photoelectric conversion module.

3. The blood oxygen parameter detection module of claim 1, wherein the first filtering area and the second filtering area are distributed in an array.

4. The blood oxygen parameter detection module of claim 3, wherein the optical signal filtering module comprises two first filtering regions and two second filtering regions, the first filtering regions and the second filtering regions are identical in shape and rectangular, the first filtering regions and the second filtering regions are arranged in a 2 x 2 array, the two first filtering regions have a first diagonal distribution, and the two second filtering regions have a second diagonal distribution.

5. The blood oxygen parameter detection module of claim 1, wherein the total area occupied by the first filtering region is equal to the total area occupied by the second filtering region.

6. The blood oxygen parameter detection module according to claim 1, wherein the optical signal filtering module comprises two first filtering regions, two second filtering regions and a third filtering region, the shape of the optical signal filtering module is a first rectangle, the third filtering region is located at the center of the first rectangle and is represented by a central circle, the first filtering region and the second filtering region are each represented by a second rectangle structure with a corner cut off by the central circle, the first filtering region and the second filtering region are arranged in a 2 x 2 array, and the first filtering region and the second filtering region together form a structure of the first rectangle with the central circle missing.

7. The blood oxygen parameter detection module of any one of claims 1 to 5, wherein the photoelectric conversion module comprises a photoelectric conversion array having a plurality of photoelectric conversion units, the photoelectric conversion array comprising at least two first photoelectric conversion regions and at least two second photoelectric conversion regions.

8. The blood oxygen parameter detection module of claim 7, wherein the photoelectric conversion unit corresponding to the first photoelectric conversion region is different from the photoelectric conversion unit corresponding to the second photoelectric conversion region.

9. The blood oxygen parameter detection module of claim 7, wherein the photoelectric conversion unit corresponding to the first photoelectric conversion region is the same as the photoelectric conversion unit corresponding to the second photoelectric conversion region.

10. The blood oxygen parameter detection module of claim 7, wherein when the photoelectric conversion region is used for converting near infrared light, the photoelectric conversion unit corresponding to the photoelectric conversion region is an AlGaAs-based photodiode or a Ge-based photodiode.

11. The blood oxygenation parameter detection module of any one of claims 1-6 or 8-10, wherein a light blocking region exists between adjacent filtering regions.

12. The blood oxygen parameter detection module of claim 11, wherein the light blocking region is a light blocking object that is opaque to light.

13. The blood oxygen parameter detection module of claim 11, wherein the light blocking region is a wire mesh metal strip or an opaque polymer adhesive layer or coating.

14. The blood oxygen parameter detection module set according to claim 1, wherein the signal processing module comprises a filtering sub-module, an analog-to-digital conversion sub-module, and a processing sub-module;

the filtering submodule is used for filtering the first electric signal and the second electric signal;

the analog-to-digital conversion sub-module is used for converting the first electric signal and the second electric signal which are filtered by the filtering sub-module into a first digital signal and a second digital signal;

and the processing sub-module is used for calculating and processing the first digital signal and the second digital signal to obtain the blood oxygen parameter information of the user.

15. The blood oxygen parameter detection module set of claim 14, wherein the signal processing module further comprises an I/O interface sub-module, the I/O interface sub-module being configured to receive and transmit data.

16. The blood oxygen parameter detection module of claim 1, wherein the first light signal and the second light signal are any two of green light, red light and near infrared light.

17. The blood oxygen parameter detection module according to any one of claims 1 to 6, 8 to 10, 12 to 16, wherein the first optical signal emission submodule and the second optical signal emission submodule are symmetrically distributed on two sides of a central axis of the optical signal filtering module.

18. The blood oxygen parameter detection module set according to claim 1, wherein the optical signal emitting module further comprises a third optical signal emitting sub-module, and the third optical signal emitting sub-module is configured to emit a third optical signal.

19. The blood oxygen parameter detection module of claim 18, wherein the third optical signal has the same wavelength as the first optical signal or the second optical signal.

20. The blood oxygen parameter detection module of claim 18, wherein the third optical signal has a different wavelength than both the first optical signal and the second optical signal.

21. An electronic device, wherein the electronic device is worn on a body surface of a user, and the electronic device comprises the blood oxygen parameter detection module according to any one of claims 1 to 20.

22. The electronic device of claim 21, further comprising a second set of optical signal emitting modules.

23. The electronic device of claim 22, wherein the optical signal emitting modules and the second set of optical signal emitting modules are symmetrically distributed on two sides of the photoelectric conversion module.

24. The electronic device of claim 22, wherein the optical signal emitting modules and the second set of optical signal emitting modules are at different distances from the optical-to-electrical conversion module.

25. The electronic device of claim 22, further comprising a third set of optical signal emitting modules and a fourth set of optical signal emitting modules, wherein the optical signal emitting modules and the second set of optical signal emitting modules are symmetrically distributed on the left and right sides of the photoelectric conversion module, and the third set of optical signal emitting modules and the fourth set of optical signal emitting modules are symmetrically distributed on the upper and lower sides of the photoelectric conversion module.

26. The electronic device of claim 25, wherein a first distance between the optical signal transmitting module and the optical-to-electrical conversion module and a second distance between the third set of optical signal transmitting modules and the optical-to-electrical conversion module are different.

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