WO2022228197A1 - 心率检测模组及电子设备 - Google Patents

心率检测模组及电子设备 Download PDF

Info

Publication number
WO2022228197A1
WO2022228197A1 PCT/CN2022/087591 CN2022087591W WO2022228197A1 WO 2022228197 A1 WO2022228197 A1 WO 2022228197A1 CN 2022087591 W CN2022087591 W CN 2022087591W WO 2022228197 A1 WO2022228197 A1 WO 2022228197A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
heart rate
optical film
rate detection
detection module
Prior art date
Application number
PCT/CN2022/087591
Other languages
English (en)
French (fr)
Inventor
魏文雄
陈星星
陈敏莉
吴冰
王帆
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP22794668.8A priority Critical patent/EP4331475A1/en
Publication of WO2022228197A1 publication Critical patent/WO2022228197A1/zh

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation

Definitions

  • the present application relates to the technical field of electronic equipment, and in particular, to a heart rate detection module and electronic equipment.
  • FIG. 1 is a schematic diagram of the application of PPG technology to detect heart rate.
  • PPG photoplethysmograph
  • test results of the above-mentioned electronic devices are usually used as a reference by users for the health management of the heart in daily life.
  • the popularization of such electronic devices and people's increasingly high requirements for heart rate detection how to improve the accuracy of heart rate detection of such electronic devices has become an urgent problem to be solved.
  • the present application provides a heart rate detection module and an electronic device to filter interference light generated in the heart rate detection process, thereby improving the accuracy of the heart rate detection.
  • the present application provides a heart rate detection module.
  • the heart rate detection module includes a substrate, and the substrate is provided with: a light source, the light source emits a light beam for heart rate detection; a light receiver arranged at intervals from the light source, the light receiver is used for receiving light signals; located between the light source and the light receiver a light blocking part, the light blocking part can optically isolate the light source and the light receiver, so that the light beam emitted from the light source cannot be directly irradiated to the light receiver; and an optical film covering the above-mentioned light source, the light receiver and the light blocking part,
  • the optical film has a filter on the side close to the substrate, and the filter can filter the interfering light directed to the light receiver during the heart rate detection process, thereby improving the signal-to-noise ratio of the heart rate detection module to achieve higher heart rate detection Accuracy.
  • the filter part may include a first light guide part, the first light guide part is arranged close to the light source, and is used to guide the interference light emitted from the light source to deviate from the light receiver, so as to reduce the interference light received by the light receiver, thereby improving the light The signal-to-noise ratio of the optical signal received by the receiver.
  • the above-mentioned first light guide portion can be set so that its section along the direction perpendicular to the optical film is a triangle, and satisfies x1>y1, where x1 is the side of the triangular section close to the light source on the surface of the optical film , and y1 is the projected length of the side of the triangular section away from the light source on the surface of the optical film.
  • the first light guide part changes the optical path of the interference light from the light source, so that it deviates from the light receiver, so as to reduce the interference light incident to the light receiver.
  • the above-mentioned first light guide part may satisfy: 60% ⁇ x1/(x1+y1) ⁇ 85%.
  • the height h1 of the cross section of the first light guide part can satisfy: 20 ⁇ m ⁇ h1 ⁇ 40 ⁇ m, and 20 ⁇ m ⁇ x1+y1 ⁇ 50 ⁇ m.
  • the above-mentioned filter part may include a second light guide part, the second light guide part is arranged close to the light receiver, and is used for guiding the interference light emitted from the optical film to deviate from the light receiver, so as to reduce the interference light received by the light receiver , thereby improving the signal-to-noise ratio of the optical signal received by the optical receiver.
  • the cross-section of the second light guide portion along the direction perpendicular to the optical film is a triangle, and satisfies: x2 ⁇ y2, where x2 is the side of the triangular cross-section away from the light receiver on the surface of the optical film
  • the projected length, y2 is the projected length of the side of the triangular section close to the light receiver on the surface of the optical film.
  • the above-mentioned second light guide part may satisfy: 15% ⁇ x2/(x2+y2) ⁇ 40%.
  • the height h1 of the cross section of the second light guide part can satisfy: 20 ⁇ m ⁇ h2 ⁇ 40 ⁇ m, and 20 ⁇ m ⁇ x2+y2 ⁇ 50 ⁇ m.
  • the above-mentioned filter part may include a third light guide part, the third light guide part is arranged close to the light receiver, and the cross section of the third light guide part along the direction perpendicular to the optical film is a right triangle, and the cross section of the right triangle is far away from the light receiving
  • the internal angle ⁇ of the device satisfies: 5° ⁇ 30°.
  • the third light guide part changes the optical path of the interfering light directed to the light receiver through the optical film, so that it deviates from the light receiver, so as to reduce the interfering light directed to the light receiver.
  • the length d3 of the cross section of the third light guide part and the side of the contact surface of the optical film satisfies: 20 ⁇ m ⁇ d3 ⁇ 50 ⁇ m.
  • a light shielding layer may be provided on the surface of the above-mentioned optical film, and the light shielding layer corresponds to the light shielding portion, so as to avoid affecting the light beam used for heart rate detection.
  • the above-mentioned optical film can be a whole optical film, so as to simplify the structure and assembly process of the heart rate detection module.
  • the above-mentioned light source, light blocking part and light receiver can be packaged integrally to realize a thinner heart rate detection module.
  • the present application provides an electronic device, which includes an electronic device body and a heart rate detection module in any of the above technical solutions, where the heart rate detection module is used to acquire a user's heart rate signal.
  • the filter part can filter the interference light directed to the optical receiver, so as to improve the signal-to-noise ratio of the acquired heart rate signal, so as to realize the heart rate detection with higher accuracy.
  • the above-mentioned heart rate detection module is detachably connected to the electronic device body, so as to facilitate the maintenance of the electronic device and the replacement of the heart rate detection module.
  • Figure 1 is a schematic diagram of the principle that PPG technology is applied to detect heart rate
  • FIG. 2 is a schematic structural diagram of a center rate detection module according to an embodiment of the present application.
  • FIG. 3 is a schematic cross-sectional view of the center rate detection module of FIG. 2 along the A-A direction;
  • FIG. 4 is a partially enlarged schematic diagram of a center rate detection module according to an embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional view of the first light guide portion in the embodiment of the present application.
  • FIG. 6 is another partial enlarged schematic diagram of the center rate detection module according to the embodiment of the present application.
  • FIG. 7 is a schematic diagram of a heart rate detection module used for heart rate detection according to an embodiment of the present application.
  • FIG. 8 is a schematic cross-sectional view of a second light guide portion in an embodiment of the present application.
  • FIG. 9 is another schematic cross-sectional structure diagram of a center rate detection module according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of an optical film in an embodiment of the application.
  • FIG. 11 is another partially enlarged schematic diagram of the center rate detection module according to the embodiment of the present application.
  • FIG. 12 is a schematic cross-sectional view of a third light guide portion in an embodiment of the present application.
  • FIG. 13 is a schematic diagram of a transmittance of the optical film in the embodiment of the application.
  • FIG. 14 is another schematic cross-sectional structure diagram of a center rate detection module according to an embodiment of the present application.
  • 15 is another schematic structural diagram of the optical film in the embodiment of the application.
  • 16 is another schematic structural diagram of a center rate detection module according to an embodiment of the present application.
  • FIG. 17 is another schematic structural diagram of a center rate detection module according to an embodiment of the present application.
  • FIG. 18 is another schematic structural diagram of a center rate detection module according to an embodiment of the present application.
  • 19 is another schematic cross-sectional structure diagram of a center rate detection module according to an embodiment of the present application.
  • FIG. 20 is a schematic diagram of another cross-sectional structure of a center rate detection module according to an embodiment of the present application.
  • 21 is a schematic diagram of a packaging process of a center rate detection module according to an embodiment of the present application.
  • FIG. 22 is a schematic structural diagram of an electronic device in an embodiment of the present application.
  • smart watches which have been favored by consumers in recent years, not only have the functions of traditional watches such as displaying time and date, but also can Monitoring the user's walking, swimming, running, cycling and other activity information provides convenience for the user's daily health management.
  • a heart rate detection module for detecting the user's heart rate.
  • the heart rate detection module uses PPG technology to obtain the user's heart rate.
  • the heart rate data can be used to monitor the user's daily heart rate status, warn of abnormal heart rate (for example, irregular heartbeat, too fast or too slow), etc.
  • the accuracy of the heart rate signal obtained by the heart rate detection module is not high, which means that there is a certain error between the heart rate reflected by the data and the real heart rate. This is due to
  • the heart rate detection module receives light reflected from the pulsating blood 01 (referred to as "effective light” in this application)
  • the heart rate detection module also simultaneously receives light from other tissues (for example, the arterial non-condensed light shown in FIG. 1 ).
  • the present application provides a heart rate detection module and an electronic device to filter interference light generated during the heart rate detection process, thereby improving the accuracy of the heart rate detection.
  • FIG. 2 is a schematic structural diagram of the center rate detection module 10 according to an embodiment of the present application
  • FIG. 3 is a schematic cross-sectional view of the center rate detection module 10 shown in FIG. 2 along the A-A direction
  • the heart rate detection module 10 provided in the present application includes a substrate 11 , one or more light sources 12 , one or more light receivers 13 , one or more light blocking parts 14 , and an optical film 15 disposed on the substrate 11 .
  • the heart rate detection module 10 includes a light source 12 , eight light receivers 13 and a light blocking portion 14 .
  • the light source 12 is spaced apart from each light receiver 13; the light blocking portion 14 is provided between the light source 12 and each light receiver 13 for optically isolating the light source 12 and each light receiver 13, Therefore, the light beam emitted by the light source 12 cannot be directly irradiated to each light receiver 13, that is, the light beam emitted from the light source 12 can only be refracted and/or refracted by other light-transmitting components (eg, the optical film 15) of the heart rate detection module 10.
  • Each light receiver 13 can only be reached after reflection; the optical film 15 covers the above-mentioned light source 12, light receiver 13 and light blocking part 14 (as shown in FIG.
  • the portion 14 is located between the substrate 11 and the optical film 15 (as shown in FIG. 3 ).
  • the optical film 15 is provided with a filter portion 150 (indicated by a dotted line in FIG. 3 ) on the side facing the substrate 11 , and the filter portion 150 can filter the interference light directed to each light receiver 13 . It should be noted that the filter portion 150 in FIG.
  • the “filtering interference light” described in this application may be It refers to absorbing the interference light, and it may also refer to the reflection and/or refraction of the interference light, so that all or part of the interference light cannot reach the light receiver 13 .
  • the heart rate detection module 10 is placed close to the detection part 30 of the user, and at this time, the side of the optical film 15 away from the substrate 11 is close to the detection part 30 .
  • the "detection part” described in this application refers to the part of the body that can detect the heart rate signal, which can be a part close to the heart, such as the chest; it can also be a part far from the heart, such as the neck, wrist, finger Points, feet, etc.
  • heart rate detection the light source 12 emits a light beam for heart rate detection, the light beam passes through the optical film 15 and is reflected at the detection site 30, and the reflected light beam passes through the optical film 15 again to reach each light receiver 13 (as shown in FIG.
  • the interference light generated in the process is filtered by the filter part 150 (as shown by the dashed arrow in FIG. 3); After analysis, the user's heart rate data can be obtained.
  • the ratio of the effective light received by one or more light receivers 13 is increased, and the heart rate detection module 10 can obtain a higher signal-to-noise ratio.
  • the accuracy of heart rate detection can be better improved.
  • FIG. 4 is a partial enlarged schematic diagram of the center rate detection module 10 according to the embodiment of the present application. As shown in FIG. 4 , take the heart rate detection module 10 including a light source 12 , a light receiver 13 and a light blocking part 14 as an example. In this embodiment, the optical film 15 is provided with one filter portion 150 .
  • the filter part 150 includes a first light guide part 151 , the first light guide part 151 is close to the light source 12 , that is to say, the first light guide part 151 is located on the side of the light blocking part 14 facing the light source 12 , and the first light guide part 151 For guiding the disturbing light from the light source 12 in a direction deviating from the light receiver 13 .
  • a schematic diagram of a path of a light beam passing through the optical film 15 in the prior art is shown by a dashed arrow.
  • the light beam shown by the solid arrow in FIG. 4 (the right side of the light beam shown by the dashed arrow) is a schematic diagram of the path of the light beam in the prior art (that is, the light beam shown by the dashed arrow) in this embodiment.
  • the refraction path of the light beam will be changed, so that it cannot be totally reflected in the optical film 15 , but is away from the substrate 11 from the optical film 15 . It is emitted from one side surface of the light beam, so that the light beam is deviated from the light receiver 13 to reduce the interference to the light receiver 13 .
  • the cross section of the first light guide portion 151 along the direction perpendicular to the optical film 15 may be arranged in a triangular shape.
  • FIG. 5 is a schematic cross-sectional view of the first light guide portion 151 in the embodiment of the present application. It should be noted that, in the embodiments of the present application, for the convenience of description, positional nouns such as upper, lower, left, right, top, bottom, etc. will be introduced, and these positional terms are only used for more concise description and to help readers locate the described objects position in the figure, rather than specifically defining the position and orientation of the referenced object.
  • the vertex angle ⁇ 1 of the triangle (the angle away from the optical film 15 ) is downward, the side opposite to the vertex angle ⁇ 1 is called the base side, and the side on the left side of the dotted line is close to the light source 12 (or away from the adjacent light receiver 13) and its projected length on the bottom side is x1, the side on the right side of the dotted line is far away from the light source 12 (or close to the adjacent light receiver 13) and its projected length on the bottom side is y1.
  • the first light guide portion 151 can satisfy: x1>y1, that is to say, the angle of the left base angle ⁇ 2 is smaller than the angle of the right base angle ⁇ 3, so that the light source 12 can be emitted with a larger incident angle.
  • the interfering light entering the optical film 15 at an angle deviates from each light receiver 13 in whole or in part, and is emitted from the surface of the optical film 15 away from the substrate 11, thereby reducing the interfering light hitting each light receiver 13 and improving the heart rate.
  • the signal-to-noise ratio of the detection module 10 is detected.
  • the "larger incident angle" in this application means that at the interface where reflection and refraction occur, the incident angle of interference light is larger than the incident angle of effective light.
  • the projected length of the width of the first light guide portion 151 on the optical film 15 is the length d1 of the bottom edge as shown in FIG.
  • the height h1 of the 151 is the vertical distance h1 between the apex angle ⁇ 1 and the bottom edge as shown in FIG. 5 , and h1 can satisfy 20 ⁇ m ⁇ h1 ⁇ 40 ⁇ m, so that the first light guide part 151 can not only have a strong function of filtering interference light, That is, the effect is better, and it is easy to manufacture and process.
  • the aforementioned width and height can also be outside the aforementioned ranges, but it may increase the difficulty of manufacturing and processing, or make the filtering effect of disturbing light unsatisfactory; for example, the width of the first light guide portion 151 is too large or the height is too small It is possible to make the first light guide portion 151 relatively flat, so that a part of the light entering the optical film 15 with a large incident angle may still be totally reflected in the optical film 15 and then directed to each light receiver 13, resulting in the first light guide.
  • the filtering function of the first light guide portion 151 is degraded; for example, the width of the first light guide portion 151 is too small, which may lead to a higher requirement on the manufacturing precision of the first light guide portion 151, which will increase the manufacturing difficulty and cost.
  • the first light guide portion 151 may also satisfy 60% ⁇ x1/(x1+y1) ⁇ 85%, and the ratio of x1 to the total width d1 is in the range of 60% to 85% (including the end value) ), for example, the value can be 60%, 63.33%, 66.67%, 70%, 73.33%, 77%, 80%, 84%, 85%, etc.
  • the first light guide part 151 satisfying this range can prevent interference light The filtering effect is better.
  • FIG. 6 is another partial enlarged schematic diagram of the center rate detection module 10 according to the embodiment of the present application.
  • the heart rate detection module 10 includes a light source 12 , a light receiver 13 and a light blocking part 14 as an example.
  • the optical film 15 is provided with one filter portion 150 .
  • the filter part 150 includes a second light guide part 152, the second light guide part 152 is close to the light receiver 13, that is, is located on the side of the light blocking part 14 close to the light receiver 13, the second light guide part 152 is used for The disturbing light passing through the optical film 15 is guided in a direction deviating from the light receiver 13 .
  • FIG. 1 is another partial enlarged schematic diagram of the center rate detection module 10 according to the embodiment of the present application.
  • the heart rate detection module 10 includes a light source 12 , a light receiver 13 and a light blocking part 14 as an example.
  • the optical film 15 is provided with one filter portion 150 .
  • the filter part 150 includes a second light guide part 152, the second light guide part
  • FIG. 6 another schematic diagram of the paths of light beams on the optical film 15 in the prior art is shown by dashed arrows.
  • Some light beams emitted from the light source 12 occur at the surface of the optical film 15 facing the substrate 11 . Refraction, a part of the refracted light is totally reflected in the optical film 15 , and the light after total reflection will reach the light receiver 13 after exiting the optical film 15 to form interference light; the other part of the refracted light passes through the optical film 15 When the light is emitted to the detection site 30, the light reflected by other tissues of the detection site 30 passes through the optical film 15 and then goes to the light receiver 13, which may also form interference light.
  • the light received by the light receiver 13 includes, in addition to the effective light, light reflected from other tissues, and light emitted from the light source 12 into the optical film 15 and reflected in the optical film 15 and then directed to the light receiver 13 These interference lights will affect the proportion of effective light in the optical signal received by the light receiver 13 .
  • the light beam shown by the solid arrow in FIG. 6 (the left side of the light beam shown by the dashed arrow) is a schematic diagram of the path of the light beam (ie, the light beam shown by the dashed arrow) in this embodiment in the prior art.
  • the path of the light beam will be changed, so that it is emitted from the surface of the optical film 15 away from the substrate 11 , or from the optical film 15 close to the substrate 11
  • One side surface of the light beam is emitted and deviates from the light receiver 13 so as not to be received by the light receiver 13 , that is, it cannot reach the light receiver 13 , which can reduce the interference to the light receiver 13 .
  • the disturbing light reflected from other tissues will be larger than the effective light reflected from the pulsating blood 01 .
  • the incident angle is incident on the optical film 15 ; in addition, the interference light that is reflected in the optical film 15 and directed to each light receiver 13 will also hit the side surface of the optical film 15 facing the substrate 11 at a larger incident angle. Therefore, as shown in FIG. 6 , in some specific embodiments of the present application, the cross-section of the second light guide portion 152 along the direction perpendicular to the optical film 15 may be arranged in a triangular shape.
  • FIG. 8 is a schematic cross-sectional view of the second light guide portion 152 in the embodiment of the present application.
  • the vertex angle ⁇ 1 of the triangle faces downward, the side opposite to the vertex angle ⁇ 1 is called the base side, and the side on the left side of the dotted line is far away from the adjacent light receiver 13 (or close to the light source 12 )
  • the length projected on the bottom edge is x2, and the side on the right side of the dotted line is close to the adjacent light receiver 13 (or far away from the light source 12), and the projected length on the bottom edge is y2.
  • the second light guide portion 152 may satisfy: x2 ⁇ y2, that is to say, the angle of the left base angle ⁇ 2 is greater than the angle of the right base angle ⁇ 3, so that the detection portion 30 has a larger incident angle.
  • the interference light incident on the optical film 15 and the interference light emitted to each light receiver 13 after being totally reflected in the optical film 15 are completely or partially deviated from the light receiver 13 , thereby reducing the interference to each light receiver 13 light, can better improve the signal-to-noise ratio of the heart rate detection module 10 .
  • the projection length of the width of the second light guide portion 152 on the optical film 15 is the length d2 of the bottom edge as shown in FIG.
  • the height h2 of the 152 is the vertical distance h2 from the top angle ⁇ 1 to the bottom edge as shown in FIG. 8 , and h2 can satisfy 20 ⁇ m ⁇ h2 ⁇ 40 ⁇ m.
  • the second light guide portion 152 can not only have a strong function of filtering interference light, that is, a better filtering effect, but also facilitate manufacturing and processing.
  • the aforementioned width and height can also be outside the aforementioned ranges, but this may lead to increased manufacturing and processing difficulties, or poor filtering effect of interfering light; for example, the width or height of the second light guide portion 152 may be too large or too small.
  • the second light guide portion 152 is relatively flat, so that a part of the light emitted from the optical film 15 toward the side surface of the substrate 11 at a larger incident angle may still be emitted to each light receiver 13, resulting in the filtering of the second light guide portion 152.
  • the function is degraded; for another example, the width of the second light guide portion 152 is too small, which may lead to a higher requirement on the manufacturing precision of the second light guide portion 152, which increases the difficulty and cost of manufacture.
  • the second light guide portion 152 may also satisfy 15% ⁇ x2/(x2+y2) ⁇ 40%, and the ratio of x2 to the total width d2 is in the range of 15% to 40% (including the end value) ), for example, the value can be 15%, 16%, 20%, 23%, 26.67%, 30%, 33.33%, 36.67, 40%, etc.
  • the second light guide part 152 satisfying this range can reduce the interference of light Better filtering.
  • FIG. 9 shows another schematic cross-sectional structure of the center rate detection module 10 according to the embodiment of the present application.
  • the filter part 150 of the optical film 15 includes a plurality of first light guide parts 151 and a plurality of first light guide parts 151 .
  • Two light guide parts 152 .
  • the cross-sections of the first light guide portion 151 and the second light guide portion 152 along the direction perpendicular to the optical film 15 are both arranged in a triangular shape (refer to the cross-sectional schematic diagrams shown in FIGS. 5 and 8 ).
  • 151 satisfies x1>y1
  • the second light guide part 152 satisfies x2 ⁇ y2, therefore, as shown in FIG.
  • FIG. 10 is a schematic structural diagram of the optical film 15 in the embodiment of the present application.
  • the solid line part in the middle is the apex angle of a plurality of first light guide parts 151
  • the dotted line part of the outer circumference of the solid line part is a plurality of first light guide parts 151 .
  • the heart rate detection module 10 includes a light source 12 , a plurality of light receivers 13 and a light blocking portion 14 .
  • the first light guide portion 151 filters the interference light that enters the optical film 15 from the light source 12 with a larger incident angle; on the side of the light receiver 13 , the second light guide portion 152 Interfering light reflected in the optical film 15 and incident to each light receiver 13 at a large angle, and interfering light reflected from other tissues of the detection site 30 and entering the optical film 15 at a large angle are filtered.
  • the aforementioned “one side of the light source 12” refers to the side of the light blocking portion 14 close to the light source 12 with the light blocking portion 14 as the limit; the aforementioned “one side of the light receiver 13” refers to the light blocking portion 14.
  • the portion 14 is a boundary, and the side of the light blocking portion 14 close to the light receiver 13 is defined. Therefore, in the heart rate detection module 10 of the above-mentioned embodiment, not only the cross-light phenomenon transmitted from the light source 12 to each light receiver 13 through the optical film 15 can be reduced, but also the interference light reflected from the detection part 30 can be filtered, thereby The influence of the interference light on the effective light received by each light receiver 13 can be better reduced, and the accuracy of the heart rate detection module 10 for detecting the heart rate can be improved.
  • FIG. 11 is another schematic structural diagram of the center rate detection module 10 according to the embodiment of the present application.
  • the heart rate detection module 10 includes a light source 12 , a light receiver 13 and a light blocking part 14 as an example.
  • the filter part 150 includes a plurality of third light guide parts 153 .
  • the third light guide portion 153 is disposed close to the light receiver 13 , that is to say, located on the side of the light blocking portion 14 close to the light receiver 13 , and the third light guide portion 153 is used to reduce interference from the optical film 15 .
  • the light is directed away from the light receiver 13, thereby reducing interference with the light receiver 13 receiving effective light, which may include light reflected from other tissue at the detection site 30 and incident from the light source 12 into the optical film 15 and the light emitted to the light receiver 13 after being totally reflected in the optical film 15 .
  • each third light guide portion 153 along the direction perpendicular to the optical film 15 is a right triangle.
  • FIG. 12 is a schematic cross-sectional view of the third light guide portion 153 in the embodiment of the present application. As shown in FIG. 12 , the right angle of the triangle faces downward, the opposite side of the right angle is the base side, and the angle ⁇ is the inner angle of the third light guide portion 153 close to the light source 12 (as shown in the left inner corner in FIG. 12 ).
  • the refractive index of the optical film 15 as 1.5 as an example, it is expected to filter the light beam reflected from the detection site 30 and incident on the optical film 15 with an incident angle i ⁇ 50°, where the incident angle i refers to the light beam The incident angle when the optical film 15 is incident on the optical film 15 from the surface of the side away from the substrate 11 .
  • the refraction angle ⁇ in 15 is 30.71°; since the third light guide portion 153 is a right-angled triangle, the incident angles of the light beam at the right-angled boundary surface of the third light guide portion 153 are respectively (30.71°+ ⁇ ) and ( 59.29°- ⁇ ).
  • the incident angle of the light at the right-angle interface is 45°, which is greater than the total reflection angle of the optical film 15 and the air, which is 42°, so the interference light can be reflected out of the optical
  • the film 15 is offset from the light receiver 13 .
  • FIG. 13 is a schematic diagram of the transmittance of the optical film 15 with the above structure.
  • the negative sign "-" means that the incident angle is on the side of the normal line (as shown by the dot-dash line in Fig. 11 ) and closer to the light source 12 when the light is directed to the interface (as indicated by the incident angle i in Fig. 11 ). Show).
  • changing from a negative angle to a positive angle means that the incident angle changes from the left side of the normal to the right side of the normal.
  • the “incidence angle” in the embodiments of the present application includes when light is emitted from the light source 12 to the optical film 15 , when the light is reflected from the detection portion 30 to the optical film 15 , when it is totally reflected in the optical film 15 , and when the light is The incident angle when the film 15 is emitted toward the light receiver 13, therefore, the angle of the incident angle in the embodiment of the present application can be understood as negative. It can be seen from Figure 13 that as the incident angle ranges from -85° to -45°, the transmittance gradually increases and then decreases slowly; as the incident angle ranges from -45° to 85°, the transmittance increases The rate gradually increased and then decreased slowly. Referring to FIG.
  • the width of the third light guide portion 153 refers to the projected length of the third light guide portion 153 on the optical film 15 , such as the length d3 of the bottom edge as shown in FIG. 12 .
  • d3 can satisfy: 20 ⁇ m ⁇ d3 ⁇ 50 ⁇ m.
  • the filter part 150 may be any one of one or more first light guide parts 151 , one or more second light guide parts 152 , and one or more third light guide parts 153
  • the filter part 150 includes only one or more first light guide parts 151 , or only includes one or more second light guide parts 152 , or only includes one or more third light guide parts 153
  • the filter part 150 may include one or more first light guide parts 151 and one or more third light guide parts 153, or the filter part 150 may include one or more first light guide parts 151, and one or more A plurality of second light guide parts 152, or the filter part 150 may include one or more second light guide parts 152, and one or more third light guide parts 153, or the filter part 150 may include one or more The first light guide portion 151 , one or more second light guide portions 152 , one or more third light guide portions 153 , and the like.
  • the filter part 150 may be provided according to the position of each light receiver 13 .
  • the filter part 150 includes a plurality of first light guide parts 151 and a plurality of second light guide parts 152.
  • the heart rate detection module 10 includes eight annularly distributed The light receiver 13, the filter part 150 includes eight first light guide parts 151 and eight second light guide parts 152, the eight first light guide parts 151 and the eight second light guide parts 152 along the light blocking part 14 are respectively provided in a one-to-one correspondence with each of the light receivers 13 .
  • the plurality of first light guide portions 151 and the plurality of second light guide portions 152 may also be provided according to the specific shape of the light blocking portion 14.
  • the heart rate detection module 10 includes a ring-shaped A light blocking part 14 and a filter part 150 of the shape structure include six first light guide parts 151 and six second light guide parts 152 arranged in a ring shape respectively.
  • the six The first light guide portion 151 is disposed on one side of the light source 12
  • the six second light guide portions 152 are disposed on one side of the light receiver 13 .
  • the plurality of first light guide portions 151 and the plurality of second light guide portions 152 may also be arranged in a thread shape.
  • the filter part 150 may be a part of the optical film 15 , or may be an independent component fixed to the surface of the optical film 15 by means of gluing or the like.
  • the above-mentioned filter portion 150 may also have other structures.
  • the filter part 150 may be a light-absorbing coating (eg, ink coating, etc.) disposed on the surface of the optical film 15, and the thickness, angle, shape and type of the coating are not limited. Applications are not listed one by one.
  • the above-mentioned optical film 15 can be any light-transmitting film layer such as a prism, a lens, or a scattering film.
  • Layer-structured optical film in comparison, using a single-layered optical film can reduce the manufacturing process of cutting and laminating the optical film 15 and reduce the assembly difficulty of the heart rate detection module 10 .
  • FIG. 14 is another schematic cross-sectional structure diagram of the center rate detection module 10 according to the embodiment of the present application.
  • the heart rate detection module 10 includes a light source 12 , a plurality of light receivers 13 (only two light receivers 13 are schematically shown in FIG. 14 ) and two light blocking parts 14 as an example.
  • the surface of the optical film 15 is provided with a light-shielding layer 16 corresponding to the position of the light-blocking portion 14 (refer to FIG. 2 ).
  • the light-shielding layer 16 will not affect the radiation from the light source 12 to the detection portion. 30 and the propagation of the light beam reflected from the detection part 30 and directed to each photoreceiver 13 .
  • the light shielding layer 16 can reduce the interference light. For example, part of the light incident on the optical film 15 with a larger incident angle is shielded by the light shielding layer 16 , so that it will not be directed to each light receiver 13 .
  • the light shielding layer 16 can be a light absorbing coating coated on the surface of the optical film 15 , for example, the light shielding layer 16 shown in FIG. 15 is an ink coating;
  • the light shielding layer 16 may be disposed on one side surface of the optical film 15, or may be disposed on the two side surfaces of the optical film 15, and the embodiments of the present application will not be described in any progress.
  • a plurality of light receivers 13 surround the light source 12, and the two light blocking parts 14 are in the shape of a ring.
  • the ring-shaped light blocking parts are arranged on the periphery of the light receivers 13, so that the light source 12 and the light receivers 13 are isolated in their respective spaces by the light blocking parts 14, so that the light emitted by the light source 12 or the external light cannot be directly irradiated
  • each light receiver 13 can only receive the light beam passing through the optical film 15, which can more effectively reduce the influence of other interfering light on the effective light received by the receiver 15, and further improve the efficiency.
  • 16 to 18 are schematic views of different structures of the center rate detection module 10 according to the embodiment of the present application, showing one or more light sources 12 , multiple light receivers 13 and one or more light blocking parts 14 on the substrate 11 different layouts.
  • eight light receivers 13 are equidistantly surrounding the four light sources 12 arranged in a rectangular shape in a ring shape, and a light blocking part 14 is arranged in a ring shape between the light sources 12 and these light receivers 13 , so that the light emitted by the light source 12 can only be emitted through the optical film 15 .
  • FIG. 16 eight light receivers 13 are equidistantly surrounding the four light sources 12 arranged in a rectangular shape in a ring shape, and a light blocking part 14 is arranged in a ring shape between the light sources 12 and these light receivers 13 , so that the light emitted by the light source 12 can only be emitted through the optical film 15 .
  • the light source 12 can be a circular LED device, the eight light receivers 13 can be arranged at equal distances around the LED device in a rectangular shape, and a light blocking part 14 can be arranged in a rectangular shape between the light source 12 and these LED devices. between the light receivers 13 .
  • multiple light sources 12 may also be arranged around one or more light receivers 13 , for example, in a specific embodiment, eight light sources 12 surround one light receiver 13 in a ring shape.
  • two light receivers 13 are arranged diagonally, and two light sources 12 are arranged on both sides of the two light receivers 13 , to form a diagonal.
  • the number and arrangement of the light sources 12, the light receivers 13 and the light blocking parts 14, such as annular, polygonal, or diagonal arrangement, are not limited. Set according to the size and shape of the electronic device or the user's specific preferences and needs.
  • FIG. 19 is another schematic cross-sectional structure diagram of the center rate detection module 10 according to the embodiment of the present application.
  • the heart rate detection module 10 may further include a cover plate 17 , which can protect other components of the heart rate detection module 10 from being damaged due to collision during transportation.
  • the cover plate 17 can be made of transparent materials such as glass, polycarbonate (Polycarbonate, PC) or polymethyl methacrylate (polymethyl methacrylate, PVC), which are not listed one by one in this application.
  • the cover plate 17 and the optical film 15 can be assembled together by means of bonding, for example, in a specific embodiment, the cover plate 17 and the optical film 15 can be bonded by a dark adhesive, the dark adhesive and one or The positions of the plurality of light blocking parts 14 correspond to each other, so that the propagation path of the effective light in the heart rate detection module 10 is not affected, and the surface structure of the optical film 15 can also be protected.
  • the optical film 15 and the light blocking portion 14 can also be assembled together by means of bonding, which is convenient for manufacture.
  • FIG. 20 is another schematic cross-sectional structure diagram of the center rate detection module 10 according to the embodiment of the present application.
  • the heart rate detection module 10 may further include an encapsulation layer 18 located between the substrate 11 and the optical film 15 .
  • the heart rate detection module 10 includes one light source 12 , multiple light receivers 13 (only two light receivers 14 are schematically shown in FIG. 14 ) and two light blocking parts 14 as an example.
  • the encapsulation layer 18 can encapsulate the light sources 12 and these light receivers 13, as shown in (a) to (d) of FIG.
  • the light sources 12 and the respective light receivers are arranged on the PCB substrate 11
  • the light source 12 and the electrodes of each light receiver 13 can be electrically connected to the substrate 11 by means of bonding wires, as shown in FIG. 21(a); then, by welding, bonding, etc.
  • the light blocking portion 14 is disposed on the substrate 11 to form an inner light blocking portion surrounding the light source 12 and an outer light blocking portion surrounding the light receivers 13, as shown in FIG. 21(b); after that, an injection molding process is adopted.
  • the light source 12 and each light receiver 13 can be chips in the form of bare chips, so that the design space of the heart rate detection module 10 can be fully utilized to reduce the thickness of the entire heart rate detection module 10;
  • the encapsulation layer 18 can also protect the chip and the circuit, so as to reduce the damage caused by the collision during transportation, and can also prevent dust and other particles from entering the heart rate detection module 10, further improving the reliability of the heart rate detection module 10 to perform heart rate detection; , since the light source 12 and each light receiver 13 are packaged, the cleanliness requirements for the processing environment can be reduced in the subsequent manufacturing process, so as to reduce the manufacturing cost.
  • the heights of the light blocking portion 14 and the encapsulation layer 18 are not required, so the cutting step shown in FIG. 21(c) can be omitted, In order to reduce the manufacturing process difficulty of the heart rate detection module 10 .
  • devices such as one or more light sources 12, one or more light blocking parts 14, and one or more light receivers 13 may be packaged into independent devices first, and then the The individual devices are mounted on the substrate 11 and are electrically connected to the substrate 11 .
  • the present application further provides an electronic device 20 , the electronic device 20 includes an electronic device body and the heart rate detection module 10 of any of the above embodiments.
  • 22 is a block diagram illustrating an electronic device 20 on which various aspects of the heart rate detection module 10 for detecting heart rate may be implemented.
  • the electronic device 20 may be provided to the user in the form of multiple devices or a single device, such as a smart phone, a wearable device, a heart rate monitor, etc., where the wearable device may be a smart watch, a smart bracelet, a helmet, a smart clothing or For other accessories, this application will not describe them one by one.
  • the filter part 150 of the heart rate detection module 10 can filter the interference light directed to each optical receiver 13, so as to provide the signal-to-noise ratio of the acquired heart rate signal, so as to achieve Highly accurate heart rate detection.
  • the electronic device 20 may further include a processor, and modules such as a memory, a sensor, a communication module, and a display screen electrically connected to the processor, wherein the heart rate detection module 10 Electrically connected to the processor.
  • modules such as a memory, a sensor, a communication module, and a display screen electrically connected to the processor, wherein the heart rate detection module 10 Electrically connected to the processor.
  • the heart rate detection module 10 is used to acquire physiological parameters such as the dynamic heart rate and blood oxygen saturation of the human body, and transmit these parameters to the processor;
  • the memory is used to save program instructions and data during program execution;
  • sensors It can be of acceleration, gyroscope, ambient light and other types, used to sense the environment where the electronic device 20 is located and its own motion state;
  • the communication module has communication functions such as WiFi, Bluetooth, NFC (Near Field Communication, near field communication), used for Transfer data to the processor or accept commands from the processor;
  • the display screen can provide a human-computer interface to present various information to the user, and the display screen can also be a touch screen for touch input;
  • the processor is used to execute program instructions , controls, manages and processes the entire system of the electronic device 20 , processes the signals obtained by the heart rate detection module 10 and generates the physiological parameters of the user.
  • the heart rate detection module 10 is detachably installed in the electronic device body, for example, it can be connected in different ways such as screw connection, snap connection, etc., which is not limited in the present application, and this design can facilitate the electronic device 20. Maintenance and replacement of the heart rate detection module 10 .
  • the heart rate detection module 10 adopts one or more light sources 12, one or more light receivers 13, and one or more light blocking parts 14 that are packaged in an integrated manner, the light blocking layer 16 and the cover plate 17 are sequentially bonded to the The encapsulation layer 18 is finally assembled into the heart rate detection module 10.
  • the heart rate detection module 10 can be installed into the electronic device body as an independent integrated device, so that the heart rate detection module 10 can be directly disassembled from the electronic device body in the later stage. repair or replace it.
  • the substrate 11 of the heart rate detection module 10 may be provided with an interface, and the interface may be connected with the electronic device 20 .
  • the following describes the process of applying the electronic device 20 to heart rate detection by taking the electronic device 20 including a smart watch and a smart phone electrically connected to the smart watch as a specific embodiment.
  • the heart rate detection module 10 of the embodiment of the present application is provided inside the smart watch, which is located at the bottom of the dial of the smart watch. Specifically, when the user wears the smart watch on the wrist, the heart rate detection module 10 The side of the optical film 15 is close to the user's wrist, and the detection part 30 is the part where the user's wrist contacts the bottom of the dial of the smart watch.
  • one or more light sources 12 of the heart rate detection module 10 emit light beams, and a part of the light beams pass through the optical film 15 and then reach the detection part 30, and the light reflected by the pulsating blood 01 of the detection part 30 again Through the optical film 15, it is directed to one or more light receivers 13.
  • each light receiver 13 After each light receiver 13 receives the light signal, the data of the light signal is transmitted to the processor of the smart watch through the communication module. After processing and analysis, the user's heart rate status is finally obtained and displayed to the user through the display screen.
  • the interfering light directed to each optical receiver 13 can be filtered by the filter part 150, so that the ratio of the effective light in the optical signal can be effectively increased, and the signal-to-noise ratio and the signal-to-noise ratio of the heart rate detection module 10 can be improved. Detection accuracy of the electronic device 20 .
  • references in this specification to "one embodiment” or “some embodiments” and the like mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application.
  • the appearances of the phrases “in one embodiment”, “in another embodiment”, “in some embodiments”, “in some other embodiments”, “in In other embodiments,” etc. are not necessarily all referring to the same embodiment, but mean “one or more but not all embodiments” unless specifically emphasized otherwise.
  • the terms “including”, “including”, “having” and their variants mean “including but not limited to” unless specifically emphasized otherwise.

Abstract

一种心率检测模组（10）及电子设备（20），该心率检测模组（10）包括基板（11）以及设置于基板（11）的光源（12）、光接收器（13）、挡光部（14）和光学膜（15）。挡光部（14）设置在光源（12）和光接收器（13）之间，使光源（12）和光接收器（13）两者在光学上隔绝。光学膜（15）覆盖光源（12）、挡光部（14）和光接收器（13），并且光学膜（15）在朝向基板（11）的一侧设置有滤光部（150），在应用时，滤光部（150）可以将射向光接收器（13）的干扰光过滤，使光接收器（13）接收到的干扰光减少，从而提高心率检测模组（10）的信噪比，以实现电子设备（20）的较高心率检测精确度。

Description

心率检测模组及电子设备
相关申请的交叉引用
本申请要求在2021年04月25日提交中国专利局、申请号为202110449802.0、申请名称为“心率检测模组及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电子设备技术领域，尤其涉及到一种心率检测模组及电子设备。
背景技术
随着人们对自身健康关注的提升，各种简单便捷的电子设备技术应运而生。
目前，对心率进行检测的电子设备(例如穿戴设备、小型心率测量仪等)主要采用光体积变化描记图(Photoplethysmograph，PPG)技术。图1为PPG技术应用于检测心率的原理图。在心脏跳动时，人体内的血管会随之收缩和扩张，从而产生血液体积变化(如图1中所示的搏动血液01)，而这一变化会对光造成不同程度的吸收影响。因此，PPG技术根据这一现象利用特定的光束照射皮肤并分析反射回来的光，从而得到人体的心率值。
不同于医学上的专业检测，上述电子设备的检测结果通常被用户作为参考，用于日常生活中对心脏的健康管理。然而，随着这类电子设备的普及和人们对心率检测要求越来越高，如何提高这类电子设备的心率检测精确度成为亟待解决的问题。
发明内容
本申请提供了一种心率检测模组及电子设备，以过滤心率检测过程中产生的干扰光，进而提高心率检测的精确度。
第一方面，本申请提供了一种心率检测模组。该心率检测模组包括基板，基板上设置有：光源，该光源发射用于心率检测的光束；与光源间隔设置的光接收器，该光接收器用于接收光信号；位于光源和光接收器之间的挡光部，该挡光部可以在光学上隔绝光源和光接收器，以使从光源射出的光束无法直接照射到光接收器；以及覆盖上述光源、光接收器和挡光部的光学膜，该光学膜靠近基板的一侧具有滤光部，滤光部在心率检测过程中可以过滤射向光接收器的干扰光，从而提高心率检测模组的信噪比，以实现较高的心率检测精确度。
上述滤光部可以包括第一导光部，第一导光部靠近光源设置，并且用于引导从光源射出的干扰光偏离光接收器，以减少光接收器接收到的干扰光，从而提高光接收器接收到的光信号的信噪比。
在具体的技术方案中，上述第一导光部可以设置成其沿垂直于光学膜方向的剖面为三角形，并且满足x1>y1，其中，x1为该三角形剖面靠近光源的侧边在光学膜表面的投影长度，y1为该三角形剖面远离光源的侧边在光学膜表面的投影长度。相对于平坦的光学膜表面，该第一导光部改变了来自光源的干扰光的光学路径，使其偏离光接收器，以减少射 向光接收器的干扰光。
为了更有效地过滤来自光源的干扰光，上述第一导光部可以满足：60％≤x1/(x1+y1)≤85％。
为了在保持第一导光部的良好滤光效果的同时，又使其便于制造和加工，该第一导光部的剖面的高度h1可以满足：20μm≤h1≤40μm，并且20μm≤x1+y1≤50μm。
上述滤光部可以包括第二导光部，该第二导光部靠近光接收器设置，并且用于引导从光学膜射出的干扰光偏离光接收器，以减少光接收器接收到的干扰光，从而提高光接收器接收到的光信号的信噪比。
在具体的技术方案中，上述第二导光部沿垂直于光学膜方向的剖面为三角形，并且满足：x2<y2，其中，x2为该三角形剖面远离光接收器的侧边在光学膜表面的投影长度，y2为该三角形剖面靠近光接收器的侧边在光学膜表面的投影长度。相对于平坦的光学膜表面，该第二导光部改变了从光学膜射出的干扰光的光学路径，使其偏离光接收器，以减少射向光接收器的干扰光。
为了更有效地过滤从光学膜射出的干扰光，上述第二导光部可以满足：15％≤x2/(x2+y2)≤40％。
为了在保持第二导光部的良好滤光效果的同时，又使其便于制造和加工，该第二导光部的剖面的高度h1可以满足：20μm≤h2≤40μm，并且20μm≤x2+y2≤50μm。
上述滤光部可以包括第三导光部，该第三导光部靠近光接收器设置，并且该第三导光部沿垂直于光学膜方向的剖面为直角三角形，该直角三角形剖面远离光接收器的内角θ满足：5°≤θ≤30°。相对于平坦的光学膜表面，该第三导光部改变了经过光学膜射向光接收器的干扰光的光学路径，使其偏离光接收器，以减少射向光接收器的干扰光。
为了在保持第三导光部的良好滤光效果的同时，又使其便于制造和加工，该第三导光部的剖面与光学膜接触面的边的长度d3满足：20μm≤d3≤50μm。
为了进一步过滤干扰光，上述光学膜的表面可以设置遮光层，该遮光层与挡光部相对应，以避免影响用于心率检测的光束。
上述光学膜可以为一整张光学膜，以简化心率检测模组的结构以及组装流程。
在具体的技术方案中，可以一体化封装上述光源、挡光部和光接收器，以实现较薄的心率检测模组。
第二方面，本申请提供了一种电子设备，该电子设备包括电子设备本体和上述任一技术方案中的心率检测模组，该心率检测模组用于获取用户的心率信号。在获取光信号的过程中，滤光部可以过滤射向光接收器的干扰光，以提高获取到的心率信号的信噪比，从而实现较高精确度的心率检测。
在具体的技术方案中，上述心率检测模组可拆卸地连接至电子设备本体，以便于电子设备的维修以及心率检测模组的更换。
附图说明
图1为PPG技术应用于检测心率的原理示意图；
图2为本申请实施例中心率检测模组的一种结构示意图；
图3为图2中心率检测模组沿A-A方向的截面示意图；
图4为本申请实施例中心率检测模组的一种局部放大示意图；
图5为本申请实施例中第一导光部的一种剖面示意图；
图6为本申请实施例中心率检测模组的另一种局部放大示意图；
图7为本申请实施例中心率检测模组用于心率检测的示意图；
图8为本申请实施例中第二导光部的一种剖面示意图；
图9为本申请实施例中心率检测模组的另一种截面结构示意图；
图10为本申请实施例中光学膜的一种结构示意图；
图11为本申请实施例中心率检测模组的另一种局部放大示意图；
图12为本申请实施例中第三导光部的一种剖面示意图；
图13为本申请实施例中光学膜的一种透过率示意图；
图14为本申请实施例中心率检测模组的另一种截面结构示意图；
图15为本申请实施例中光学膜的另一种结构示意图；
图16为本申请实施例中心率检测模组的另一种结构示意图；
图17为本申请实施例中心率检测模组的另一种结构示意图；
图18为本申请实施例中心率检测模组的另一种结构示意图；
图19为本申请实施例中心率检测模组的另一种截面结构示意图；
图20为本申请实施例中心率检测模组的另一种截面结构示意图；
图21为本申请实施例中心率检测模组的一种封装流程示意图；
图22为本申请实施例中电子设备的一种结构示意图。
附图标记：
背景技术部分：
01-搏动血液；                     02-动脉非搏动血液；
03-静脉血液；                     04-皮肤表层；
本申请实施例部分：
10-心率检测模组；                 20-电子设备；
30-检测部位；                     11-基板；
12-光源；                         13-光接收器；
14-挡光部；                       15-光学膜；
150-滤光部；                      151-第一导光部；
152-第二导光部；                  153-第三导光部；
16-遮光层；                       17-盖板；
18-封装层。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
随着电子设备技术的发展，电子设备增加了越来越多的功能来满足用户的不同需求，例如近年来受到消费者青睐的智能手表，不仅具有展示时间和日期等传统手表的功能，还可以监测用户的步行、游泳、跑步、骑行等活动信息，为用户的日常健康管理提供了方便。特别地，为了便于用户监测自身在日常生活中或运动时的心率状态，越来越多的电子设备具有用于检测用户心率的心率检测模组，心率检测模组采用PPG技术来获取用户的心率数 据，该心率数据可以用于监测用户的日常心率状态、预警异常心率(例如心跳不规则、过快或过慢)等。
然而，目前当用户使用电子设备进行心率检测时，心率检测模组获取到的心率信号的精确度不高，也就是说该数据反映的心率与真实的心率之间存在一定的误差，这是由于在心率检测模组接收来自搏动血液01反射的光(在本申请中称为“有效光”)时，心率检测模组还会同时接收到从其他组织(例如，图1中所示的动脉非搏动血液02、静脉血液03和皮肤表层04)反射的光、以及从电子设备的器件反射的光等，这些光束(在本申请中可以称为干扰光)在一定程度上会干扰电子设备对有效光的分析，使得电子设备获得的心率数据可靠性不佳，导致最终得到的心率检测结果的精确度不高。
为此，本申请提供了一种心率检测模组及电子设备，以过滤心率检测过程中产生的干扰光，进而提高心率检测的精确度。
图2为本申请实施例中心率检测模组10的一种结构示意图，图3为图2所示的中心率检测模组10沿A-A方向的截面示意图。本申请提供的心率检测模组10包括基板11以及设置于基板11的一个或多个光源12、一个或多个光接收器13、一个或多个挡光部14、以及光学膜15。如图2和图3所示，在本实施例中，心率检测模组10包括一个光源12、八个光接收器13和一个挡光部14。具体而言，光源12与每个光接收器13间隔设置；挡光部14设置在光源12和每个光接收器13之间，用于在光学上隔离光源12和每个光接收器13，从而使光源12发射的光束无法直接照射到每个光接收器13，也就是说，从光源12射出的光束只有经过心率检测模组10的其他透光器件(例如光学膜15)折射和/或反射后才能到达每个光接收器13；光学膜15覆盖上述光源12、光接收器13和挡光部14(如图2所示)，也就是说，光源12、光接收器13和挡光部14位于基板11和光学膜15之间(如图3所示)。光学膜15在朝向基板11的一侧设置有滤光部150(图3中用虚线表示)，滤光部150可以过滤射向每个光接收器13的干扰光。需要说明的是，图3中的滤光部150仅是示意图，并不用于限定滤光部150的数量、结构和与其他部件之间的位置；本申请中描述的“过滤干扰光”可以是指吸收干扰光，也可以是指经反射和/或折射干扰光，使全部或部分的干扰光不能到达光接收器13。
在应用时，将心率检测模组10靠近用户的检测部位30，此时，光学膜15远离基板11的一侧靠近检测部位30。需要说明的是，本申请中描述的“检测部位”是指能够检测到心率信号的身体部位，可以是靠近心脏的部位，例如胸部；也可以是远离心脏的部位，例如颈部、手腕、指尖、足部等。当进行心率检测时，光源12发射用于心率检测的光束，该光束穿过光学膜15后在检测部位30形成反射，反射的光束再次穿过光学膜15到达每个光接收器13(如图3的实线箭头所示)，而在该过程中产生的干扰光则被滤光部150过滤(如图3的虚线箭头所示)；通过电子设备对各个光接收器13所接收的光信号进行分析，可以获得用户的心率数据，本申请实施例在过滤干扰光后使得一个或多个光接收器13接收到的有效光比例提高，心率检测模组10可以获得较高的信噪比，从而可以较好地提高心率检测的精确度。
下面将详细地描述上述光学膜15的结构。图4为本申请实施例中心率检测模组10的一种局部放大示意图。如图4所示，以心率检测模组10包括一个光源12、一个光接收器13和一个挡光部14为例。在该实施例中，光学膜15设置有一个滤光部150。滤光部150包括一个第一导光部151，第一导光部151靠近光源12，也就是说第一导光部151位于挡 光部14朝向光源12的一侧，第一导光部151用于将来自光源12的干扰光向偏离光接收器13的方向进行引导。具体而言，如图4所示，以虚线箭头示出了现有技术中光束穿过光学膜15的一种路径示意图，从光源12射出的一些光束在光学膜15朝向基板11的表面处发生折射，折射后的一部分光在光学膜15内发生全反射，全反射之后的光线射出光学膜15后将会到达光接收器13。换句话说，这部分光是从光源12射出后射入光学膜15，然后在光学膜15内经过全反射后射向光接收器13，从而形成干扰光；在现有技术中，这类干扰光将导致光接收器13所接收到的光信号中有效光的比例降低。图4中以实线箭头所示的光束(虚线箭头所示光束的右侧)是前述现有技术中的光束(即虚线箭头所示的光束)在本实施例中的路径示意图，显然，相对于现有技术，在本实施例的第一导光部151的作用下，该光束的折射路径将发生改变，使其不能在光学膜15内发生全反射，而是从光学膜15远离基板11的一侧表面射出，从而实现将该光束偏离光接收器13，以减少对光接收器13的干扰。
请继续参考图4，从光源12射出的光束中，仅入射角度较大的光束在射入光学膜15后可能发生全反射，并最终从光学膜15朝向基板11的表面折射后射向光接收器13。因此，如图4所示，在本申请的一些具体实施例中，第一导光部151沿垂直于光学膜15方向的剖面(如图4所示，第一导光部151的剖面所在的平面垂直于光学膜15)可以设置成三角形。
图5为本申请实施例中第一导光部151的一种剖面示意图。需要说明的是，本申请实施例中，为了方便描述将引入方位名词上、下、左、右、顶、底等，这些方位词仅仅用于更简洁的描述和帮助阅读者定位所描述的对象在图中的位置，而不是对所指对象的位置和方向进行具体限定。
在如图5所示的剖面中，三角形的顶角α1(远离光学膜15的角)向下，与顶角α1相对的边称为底边，虚线左侧的侧边靠近光源12(或者说远离相邻的光接收器13)且其投影于底边的长度为x1，虚线右侧的侧边远离光源12(或者说靠近相邻的光接收器13)且其投影于底边的长度为y1。在该方案中，第一导光部151可以满足：x1>y1，也就是说，左侧底角α2的角度小于右侧底角α3的角度，这样可以使从光源12射出后以较大入射角度射入光学膜15的干扰光全部或部分地偏离各个光接收器13，从光学膜15远离基板11的一侧表面射出，从而减少射向各个光接收器13的干扰光，较好提高心率检测模组10的信噪比。需要说明的是，本申请中“较大入射角度”是指在发生反射、折射的界面处，干扰光的入射角度比有效光的入射角度更大。
上述第一导光部151的宽度在光学膜15上的投影长度为如图5所示的底边的长度d1，其中d1＝x1+y1且可以满足20μm≤d1≤50μm，第一导光部151的高度h1为如图5所示的顶角α1到底边的垂直距离h1，h1可以满足20μm≤h1≤40μm，这样可以使第一导光部151既具有较强的过滤干扰光的功能，即过效果较好，又便于制造和加工。当然，前述的宽度和高度也可以在前述范围外，但可能会导致制造及加工难度增加，或者使过滤干扰光的效果欠佳；例如，第一导光部151的宽度太大或高度太小可能使第一导光部151比较平坦，使以较大入射角度射入光学膜15的一部分光仍然有可能在光学膜15内发生全反射后射向各个光接收器13，导致第一导光部151的过滤功能下降；又例如，第一导光部151的宽度太小可能会导致对第一导光部151的制造精度要求较高，会增加制作难度和成本。
在另外一些实施例中，第一导光部151还可以满足60％≤x1/(x1+y1)≤85％，x1占 总宽度d1的比例在60％至85％的范围内(包括端值)，例如，可以取值60％、63.33％、66.67％、70％、73.33％、77％、80％、84％、85％等等，满足该范围的第一导光部151可以对干扰光的过滤效果更佳。
图6为本申请实施例中心率检测模组10的另一种局部放大示意图。如图6所示，以心率检测模组10包括一个光源12、一个光接收器13和一个挡光部14为例。在该实施例中，光学膜15设置有一个滤光部150。滤光部150包括一个第二导光部152，第二导光部152靠近光接收器13，也就是说位于挡光部14靠近光接收器13的一侧，第二导光部152用于将经过光学膜15的干扰光向偏离光接收器13的方向进行引导。具体而言，如图6所示，以虚线箭头示出了现有技术中光束在光学膜15的另一种路径示意图，从光源12射出的一些光束在光学膜15朝向基板11的表面处发生折射，折射后的一部分光在光学膜15内发生全反射，全反射之后的光线射出光学膜15后将会到达光接收器13，形成干扰光；折射后的另一部分光穿过光学膜15后射向检测部位30，在检测部位30的其他组织反射的光穿过光学膜15后射向光接收器13，也可能形成干扰光。换句话说，光接收器13接收到的光除了有效光以外，还包含从其他组织反射的光、以及从光源12射入光学膜15并在光学膜15内反射后射向光接收器13的光，这些干扰光都会影响光接收器13所接收到的光信号中有效光的比例。图6中实线箭头所示的光束(虚线箭头所示光束的左侧)是前述现有技术中的光束(即虚线箭头所示的光束)在本实施例中的路径示意图，显然，相对于现有技术，在本实施例的第二导光部152的作用下，该光束的路径将发生改变，使其从光学膜15远离基板11的一侧表面射出，或者从光学膜15靠近基板11的一侧表面射出并且偏离光接收器13，从而不被光接收器13接收到，即不能到达光接收器13，可以减少对光接收器13的干扰。
如图7所示，由于检测部位30的其他组织比搏动血液01更靠近心率检测模组10，因此，相比从搏动血液01反射的有效光，从其他组织反射的干扰光会以更大的入射角度射入光学膜15；另外，在光学膜15内经过反射后射向每个光接收器13的干扰光也会以较大的入射角度射向光学膜15朝向基板11的一侧表面。因此，如图6所示，在本申请的一些具体实施例中，第二导光部152沿垂直于光学膜15方向的剖面可以设置成三角形。
图8为本申请实施例中第二导光部152的一种剖面示意图。在图8所示的剖面中，三角形的顶角β1朝下，与顶角β1相对的边称为底边，虚线左侧的侧边远离相邻的光接收器13(或者说靠近光源12)其投影于底边的长度为x2，虚线右侧的侧边靠近相邻的光接收器13(或者说远离光源12)其投影于底边的长度为y2。在本申请实施例中，第二导光部152可以满足：x2<y2，也就是说，左侧底角β2的角度大于右侧底角β3的角度，这样从检测部位30以较大入射角射入光学膜15的干扰光、以及在光学膜15内经过全反射后射向各个光接收器13的干扰光全部或部分地偏离光接收器13，从而减少射向各个光接收器13的干扰光，可以较好地提高心率检测模组10的信噪比。
上述第二导光部152的宽度在光学膜15上的投影长度为如图8所示的底边的长度d2，其中d2＝x2+y2且可以满足20μm≤d2≤50μm，第二导光部152的高度h2为如图8所示的顶角β1到底边的垂直距离h2，h2可以满足20μm≤h2≤40μm。这样可以使第二导光部152既具有较强的过滤干扰光的功能，即过效果较好，又便于制造和加工。当然，前述的宽度和高度也可以在前述范围外，但可能导致制造及加工难度增加，或者使过滤干扰光的效果欠佳；例如，第二导光部152的宽度太大或高度太小可能导致第二导光部152比较平坦， 使以较大入射角度从光学膜15朝向基板11的一侧表面射出一部分光仍然有可能射向各个光接收器13，导致第二导光部152的过滤功能下降；又例如，第二导光部152的宽度太小可能导致对第二导光部152的制造精度要求较高，会增加制作难度和成本。
在其他一些实施例中，第二导光部152还可以满足15％≤x2/(x2+y2)≤40％，x2占总宽度d2的比例在15％至40％的范围内(包括端值)，例如，可以取值15％、16％、20％、23％、26.67％、30％、33.33％、36.67、40％等等，满足该范围的第二导光部152可以对干扰光的过滤效果更佳。
下面以本申请的一个实施例进行说明。图9示出了本申请实施例中心率检测模组10的另一种截面结构示意图，如图9所示，光学膜15的滤光部150包括多个第一导光部151和多个第二导光部152。具体而言，第一导光部151和第二导光部152的沿垂直于光学膜15方向的剖面均设置成三角形(参考图5、图8所示的剖面示意图)，第一导光部151满足x1>y1并且第二导光部152满足x2<y2，因此，如图9所示，第一导光部151和第二导光部152的顶角均朝向挡光部14。
请参照图10，图10为本申请实施例中光学膜15的一种结构示意图，中间的实线部分为多个第一导光部151的顶角，实线部分外周的虚线部分为多个第二导光部152的顶角。在本实施例中，心率检测模组10包括一个光源12、多个光接收器13和一个挡光部14。在应用时，在光源12的一侧，第一导光部151过滤从光源12以较大入射角射入光学膜15的干扰光；在光接收器13的一侧，第二导光部152过滤在光学膜15内经反射后以较大角度射向各个光接收器13的干扰光、以及从检测部位30的其他组织反射并以较大角度射入光学膜15的干扰光等。需要说明的是，前述“光源12的一侧”是指以挡光部14为界限，挡光部14的靠近光源12的一侧；前述“光接收器13的一侧”是指以挡光部14为界限，挡光部14的靠近光接收器13的一侧。因此，在上述实施例的心率检测模组10中，不仅可实现降低经过光学膜15从光源12传到各个光接收器13的串光现象，还可以过滤从检测部位30反射的干扰光，从而可以较好地降低干扰光对每个光接收器13接收有效光的影响，提高心率检测模组10用于检测心率的精确度。
在一个具体的实施例中，每个第一导光部151还可以满足60％≤x1/(x1+y1)≤85％，每个第一导光部151的宽度d1(即d1＝x1+y1)可以满足20μm≤d1≤50μm，每个第一导光部151的高度h1可以满足20μm≤h1≤40μm；每个第二导光部152还可以满足15％≤x2/(x2+y2)≤40％，每个第二导光部152的宽度d2(即d2＝x2+y2)可以满足20μm≤d2≤50μm，每个第二导光部152的高度h2可以满足20μm≤h2≤40μm。下面的表1以具有宽度为30μm(即，d1＝d2＝30μm)的多个第一导光部151和多个第二导光部152的光学膜15为例，对光学膜15进行仿真。从表1中可以看到，在相同的宽度情况下，随着y1和x2逐渐减小，换句话说随着第一导光部151的顶角和第二导光部152的顶角越来越靠近挡光部14，透过光和透过率的值逐渐增大，也就是说光学膜15在具有过滤干扰光的功能情况下，也能保持较佳的透光性能。
表1
Figure PCTCN2022087591-appb-000001
Figure PCTCN2022087591-appb-000002
图11为本申请实施例中心率检测模组10的再一种结构示意图。如图11所示，以心率检测模组10包括一个光源12、一个光接收器13和一个挡光部14为例。在该实施例中，滤光部150包括多个第三导光部153。具体而言，第三导光部153靠近光接收器13设置，也就是说位于挡光部14靠近光接收器13的一侧，该第三导光部153用于将经过光学膜15的干扰光朝向偏离光接收器13的方向引导，从而减少对光接收器13接收有效光的干扰，其中，该干扰光可以包括从检测部位30的其他组织反射的光、以及从光源12射入光学膜15并在光学膜15内全反射后射向光接收器13的光。
请继续参照图11所示，在一个具体的实施例中，每个第三导光部153沿垂直于光学膜15方向的剖面为直角三角形。图12为本申请实施例中第三导光部153的一种剖面示意图。如图12所示，三角形的直角朝下，直角相对的边为底边，角θ为第三导光部153靠近光源12的内角(如图12中左侧的内角所示)。
下面将详细描述该实施例。参考图11所示，以光学膜15的折射率为1.5为例，预期过滤从检测部位30反射、并以入射角i≥50°射入光学膜15的光束，其中，入射角i是指光从光学膜15远离基板11的一侧表面射入光学膜15时的入射角。当入射角i为50°时，根据折射定律sini/sinγ＝1.5，其中，γ为光从光学膜15远离基板11的一侧表面射入光学膜15时的折射角，可以计算出光在光学膜15内的折射角γ为30.71°；由于第三导光部153为直角三角形，因此，该光束在第三导光部153的直角边界面处的入射角分别为(30.71°+θ)和(59.29°-θ)。例如，当角θ被设计为14.29°时，该光线在直角边界面处的入射角均为45°，且大于该光学膜15与空气的全反射角42°，因此干扰光可以被反射出光学膜15而偏离光接收器13。
请参考图13，该图示出了上述结构的光学膜15的透过率示意图。需要说明的是，负号“-”是指光射向界面时入射角位于法线(如图11中的点划线所示)更靠近光源12的一侧(如图11中入射角i所示)。在图13中，从负的角度变化至正的角度是指入射角从法线的左侧变化至法线的右侧。需要注意的是，本申请实施例中的“入射角”包括光从光源12射向光学膜15时、从检测部位30反射至光学膜15时、在光学膜15内全反射时、以及在光学膜15内向光接收器13射出时的入射角，因此，本申请实施例的入射角的角度可以理解为负。从图13中可以看出，随着入射角度的范围从-85°到-45°变化，透过率逐渐增大后缓慢下降；随着入射角度的范围从-45°到85°变化，透过率又逐渐增大后缓慢下降。参考图7可知，检测部位30的其他组织(例如皮肤表层04)距离心率检测模组10更近，其他组织反射的光射入光学膜15的入射角度更大，而搏动血液01距离心率检测模组10更远，搏动血液01反射的光射入光学膜15的入射角度更小，因此，可以考虑将经检测部位30反射并以入射角为30°～60°射入光学膜15的光束作为干扰光过滤，此时角θ满足5°≤θ≤30°。
在本申请的一些实施例中，第三导光部153的宽度是指第三导光部153在光学膜15上的投影长度，如图12所示的底边的长度d3。类似上述第一导光部151和第二导光部152， 为了使第三导光部153既能够具有较好的过滤干扰光的效果，又便于制造和加工，d3可以满足：20μm≤d3≤50μm。
在本申请的实施例中，滤光部150可以是一个或多个第一导光部151、一个或多个第二导光部152、以及一个或多个第三导光部153中的任意组合，例如：滤光部150仅包括一个或多个第一导光部151，或者仅包括一个或多个第二导光部152，或者仅包括一个或多个第三导光部153，或者滤光部150可以包括一个或多个第一导光部151、以及一个或多个第三导光部153，或者滤光部150可以包括一个或多个第一导光部151、以及一个或多个第二导光部152，或者滤光部150可以包括一个或多个第二导光部152、以及一个或多个第三导光部153，或者滤光部150可以包括一个或多个第一导光部151、一个或多个第二导光部152、以及一个或多个第三导光部153等等。
此外，滤光部150可以根据各个光接收器13的位置进行设置。例如，以滤光部150包括多个第一导光部151和多个第二导光部152作为示意进行说明，在一个具体的实施例中，心率检测模组10包括八个呈环形分布的光接收器13，滤光部150包括八个第一导光部151和八个第二导光部152，该八个第一导光部151和八个第二导光部152沿挡光部14分别设置为与每个光接收器13一一对应。另外，多个第一导光部151和多个第二导光部152也可以根据挡光部14的具体形状设置，例如，在另一个具体的实施例中，心率检测模组10包括呈环形状结构的一个挡光部14，滤光部150包括分别呈环形状排列的六个第一导光部151和六个第二导光部152，参考图9和图10所示，该六个第一导光部151设置在光源12的一侧，该六个第二导光部152设置在光接收器13的一侧。在又一个具体的实施例中，多个第一导光部151和多个第二导光部152还可以呈螺纹状排列。
在本申请实施例中，滤光部150可以是光学膜15的一部分，也可以是通过胶粘等方式固定于光学膜15表面的独立部件。在其他的实施例中，上述滤光部150还可以为其他结构。例如，在一些实施例中，滤光部150可以为设置在光学膜15表面的吸光涂层(例如油墨涂层等等)，该涂层的厚度、角度、形状以及类型等均不限，本申请不做一一列举。
上述光学膜15可以为棱镜、透镜或散射膜等任何透光膜层，光学膜15的具体层结构在本申请实施例中不做限制，可以为一层结构的光学膜，或者也可以是多层结构的光学膜；相比较而言，采用一层结构的光学膜可以减少对光学膜15进行切割和贴合的制造流程，降低心率检测模组10的组装难度。
图14为本申请实施例中心率检测模组10的又一种截面结构示意图。如图14所示，以心率检测模组10包括一个光源12、多个光接收器13(图14中仅示意性地示出两个光接收器13)和两个挡光部14为例。在该实施例中，光学膜15的表面设置有与挡光部14位置相对应的遮光层16(也可参考图2)，换句话说，遮光层16不会影响从光源12射向检测部位30的光束、以及从检测部位30反射后射向各个光接收器13的光束的传播。遮光层16可以减少干扰光，例如以较大入射角度射向光学膜15的部分光被遮光层16遮挡，从而不会射向各个光接收器13。该遮光层16可以是涂覆在光学膜15表面的吸光涂层，例如图15所示的遮光层16为油墨涂层；当然也可以是用于粘接光学膜15的深色胶。遮光层16可以设置在光学膜15的一侧表面，也可以设置在光学膜15的两侧表面，本申请实施例不做进步地描述。
在本实施例中，多个光接收器13围绕在光源12周围，两个挡光部14呈环形状，其中一个环形状挡光部设置在光源12和各个光接收器13之间，另一个环形状挡光部设置在 这些光接收器13的外围，使光源12和这些光接收器13分别被挡光部14隔离在各自的空间内，使光源12射出的光或者外界的光无法直接照射到各个光接收器13，也就是说，每个光接收器13只能接收到经过光学膜15的光束，这样可以更加有效地减少其它干扰光对接收器15接收有效光的影响，进一步提高本申请实例中心率检测模组10的检测精确度。
图16至图18为本申请实施例中心率检测模组10的不同结构示意图，示出了一个或多个光源12、多个光接收器13和一个或多个挡光部14在基板11上的不同布局。如图16所示，八个光接收器13以环形的形状等距地围绕在为呈矩形排列的四个光源12外围，一个挡光部14以环形的形状设置在光源12和这些光接收器13之间，使得光源12发射的光只能经过光学膜15射出。如图17所示，光源12可以为一个圆形的LED器件，八个光接收器13可以为以矩形状围绕该LED器件等距设置，一个挡光部14以矩形状设置在光源12和这些光接收器13之间。在本申请的一些其他实施例中，多个光源12也可以设置在一个或多个光接收器13周围，例如在一个具体的实施例中，八个光源12呈环形围绕一个光接收器13。或者在另一个具体的实施例中，如图18所示，在矩形状的结构中，两个光接收器13以对角方式设置，两个光源12设置在该两个光接收器13两侧，以形成对角。可以理解的是，在本申请各个实施例中，光源12、光接收器13和挡光部14的数量以及排列形式，如呈环形、多边形、或对角线设置等不做限制，具体地可以根据电子设备的尺寸、形状或者用户的具体喜好、需求进行设置。
图19为本申请实施例中心率检测模组10的另一种截面结构示意图。如图19所示，心率检测模组10还可以包括盖板17，该盖板17可以对心率检测模组10的其他器件起到保护作用，避免这些器件在运输过程中由于碰撞而被损坏。盖板17可以采用玻璃、聚碳酸酯(Polycarbonate，PC)或聚甲基丙烯酸甲酯(polymethyl methacrylate，PVC)等透明材料，本申请不做一一列举。盖板17与光学膜15可以通过粘接的方式组装在一起，例如在一个具体的实施例中，盖板17与光学膜15可通过深色粘胶粘接，该深色粘胶与一个或多个挡光部14的位置相对应，这样不会影响有效光在心率检测模组10中的传播路径，还可以保护光学膜15的表面结构。此外，光学膜15与挡光部14也可以通过粘接的方式组装在一起，这种组装方式便于制造。
图20为本申请实施例中心率检测模组10的另一种截面结构示意图。如图20所示，在本申请的实施例中，心率检测模组10还可以包括位于基板11和光学膜15之间的封装层18。在该实施例中，以心率检测模组10包括一个光源12、多个光接收器13(图14中仅示意性地示出两个光接收器14)和两个挡光部14为例。在本申请的一些实施例中，封装层18可以封装光源12和这些光接收器13，如图21中(a)至(d)所示：首先在PCB基板11上设置光源12和各个光接收器13，其中，可以通过键合线的方式将光源12和每个光接收器13的电极电连接至基板11，如图21中(a)所示；然后，通过焊接、粘接等方式将挡光部14设置于基板11，形成围绕光源12的内圈挡光部和围绕这些光接收器13的外圈挡光部，如图21中(b)所示；之后，采用注胶成型工艺将封装材料填充(例如可以采用滴胶的方式)至挡光部14与基板11形成的空间内并固化填充后的封装材料形成封装层18，使得光源12和每个光接收器13以及键合线等器件被封装，如图21中(c)所示；最后，利用激光切割将封装形成的整体器件切割成预期尺寸，如图21中(d)所示。采用这种一体化封装工艺，光源12和每个光接收器13可以采用裸片形式的芯片，这样可以充分利用心率检测模组10的设计空间，以减小整个心率检测模组10的厚度；封装层18还 可以保护芯片和电路，以减少在运输途中发生碰撞时受到的损坏，也可以避免灰尘等颗粒进入心率检测模组10，进一步提高心率检测模组10执行心率检测的可靠性；另外，由于光源12和每个光接收器13被封装，在后续的制造工艺中可以降低对加工环境的清洁度要求，以降低制造成本。
在一个具体的实施例中，当采用一整张光学膜时，对挡光部14与封装层18两者的高度可以不做要求，因此图21中(c)所示的切割步骤可以省略，以降低心率检测模组10的制造工艺难度。
此外，在本申请的其他一些实施例中，也可以先将一个或多个光源12、一个或多个挡光部14和一个或多个光接收器13等器件封装成独立器件，然后将该独立器件安装于基板11并与基板11电连接。
如图22所示，本申请还提供了一种电子设备20，该电子设备20包括电子设备本体和上述任一实施例的心率检测模组10。图22是示出了电子设备20的框图，在该电子设备20上可以实现用于检测心率的心率检测模组10的各方面。电子设备20可以是以多个设备的形式或者以单个设备的形式提供给用户，例如智能手机、穿戴设备、心率测量仪等，其中穿戴设备可以为智能手表、智能手环、头盔、智能服装或其它配饰，本申请不做一一阐述。在心率检测模组10获取光信号的过程中，心率检测模组10的滤光部150可以过滤射向各个光接收器13的干扰光，从而提供获取到的心率信号的信噪比，以实现较高精确的心率检测。
请参考图22，在本申请的一些实施例中，电子设备20还可以包括处理器、以及分别与处理器电连接的存储器、传感器、通信模块和显示屏等模块，其中，心率检测模组10与处理器电连接。在该实施例中，心率检测模组10用于获取人体的动态心率、血氧饱和度等生理参数，并将这些参数传输给处理器；存储器用于保存程序指令和执行程序期间的数据；传感器可以为加速度、陀螺仪、环境光等类型，用于感知电子设备20所在的环境以及自身的运动状态；通信模块具有WiFi、蓝牙、NFC(Near Field Communication，近场通信)等通信功能，用于向处理器传递数据或接受来自处理器的命令；显示屏可以提供人机交互界面，向用户呈现各种信息，另外该显示屏也可以是触摸屏，用于实现触摸输入；处理器用于执行程序指令，对电子设备20的整个系统进行控制、管理和信号处理，处理心率检测模组10获取的信号并生成用户的生理参数。
在本申请的实施例中，心率检测模组10可拆卸地安装在电子设备本体内，例如可以通过螺纹联接、卡接等不同的方式，本申请不做限制，这样设计可以便于电子设备20的维修以及心率检测模组10的更换。例如，在心率检测模组10采用一体化封装的一个或多个光源12、一个或多个光接收器13和一个或多个挡光部14后，遮光层16和盖板17依次粘接于封装层18，最终组装成心率检测模组10，该心率检测模组10可以作为独立的一体式器件安装至电子设备本体内，以便于后期直接从电子设备本体内拆卸心率检测模组10后对其进行维修或更换。另外，心率检测模组10的基板11可以设置有接口，该接口可以与电子设备20联接。
下面以电子设备20包括智能手表以及与该智能手表电连接的智能手机为一个具体实施例，针对该电子设备20应用于心率检测的过程进行描述。
在该实施例中，智能手表的内部设置有本申请实施例的心率检测模组10，其位于智能手表的表盘底部，具体而言，当用户将智能手表佩戴在手腕时，心率检测模组10的光学 膜15一侧靠近用户手腕，此时检测部位30为用户手腕与智能手表的表盘底部接触的部位。在启用智能手表的心率检测功能后，心率检测模组10的一个或多个光源12发射光束，一部分光束穿过光学膜15后到达检测部位30，由检测部位30的搏动血液01反射的光再次穿过光学膜15射向一个或多个光接收器13，每个光接收器13接收到光信号后，通过通信模块将该光信号的数据传输给智能手表的处理器，处理器通过对数据的处理和分析，最终获得用户的心率状态，并通过显示屏将其展示给用户。在获取光信号的过程中，射向各个光接收器13的干扰光可以被滤光部150过滤，从而可有效提高有效光在光信号中的比例，提高心率检测模组10的信噪比和电子设备20的检测精确度。
以上实施例中所使用的术语只是为了描述特定实施例的目的，而并非旨在作为对本申请的限制。如在本申请的说明书和所附权利要求书中所使用的那样，单数表达形式“一个”、“一种”、“所述”、“上述”、“该”和“这一”旨在也包括例如“一个或多个”这种表达形式，除非其上下文中明确地有相反指示。
在本说明书中描述的参考“一个实施例”或“一些实施例”等意味着在本申请的一个或多个实施例中包括结合该实施例描述的特定特征、结构或特点。由此，在本说明书中的不同之处出现的语句“在一个实施例中”、“在另一个实施例中”、“在一些实施例中”、“在其他一些实施例中”、“在另外一些实施例中”等不是必然都参考相同的实施例，而是意味着“一个或多个但不是所有的实施例”，除非是以其他方式另外特别强调。术语“包括”、“包含”、“具有”及它们的变形都意味着“包括但不限于”，除非是以其他方式另外特别强调。
以上，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (16)

  1. 一种心率检测模组，包括基板，其特征在于，还包括设置于所述基板的：
    光源；
    光接收器，与所述光源间隔设置；
    挡光部，所述挡光部设置于所述光源和所述光接收器之间；
    光学膜，所述光学膜覆盖所述光源、所述光接收器和所述挡光部，所述光学膜朝向所述基板的一侧设置有滤光部，所述滤光部用于过滤射向所述光接收器的干扰光。
  2. 根据权利要求1所述的心率检测模组，其特征在于，所述滤光部包括靠近所述光源设置的第一导光部，所述第一导光部用于引导来自所述光源的干扰光偏离所述光接收器。
  3. 根据权利要求2所述的心率检测模组，其特征在于，所述第一导光部沿垂直于所述光学膜方向的剖面为三角形，并且满足：x1>y1，其中，x1为所述第一导光部的剖面靠近所述光源的侧边在所述光学膜表面的投影长度，y1为所述第一导光部的剖面远离所述光源的侧边在所述光学膜表面的投影长度。
  4. 根据权利要求3所述的心率检测模组，其特征在于，所述第一导光部满足：60％≤x1/(x1+y1)≤85％。
  5. 根据权利要求3或4所述的心率检测模组，其特征在于，所述第一导光部的剖面的高度h1满足：20μm≤h1≤40μm，并且20μm≤x1+y1≤50μm。
  6. 根据权利要求1至5中任一项所述的心率检测模组，其特征在于，所述滤光部包括靠近所述光接收器设置的第二导光部，所述第二导光部用于引导从所述光学膜射出的干扰光偏离所述光接收器。
  7. 根据权利要求1至6中任一项所述的心率检测模组，其特征在于，所述第二导光部沿垂直于所述光学膜方向的剖面为三角形，并且满足：x2<y2，其中，x2为所述第二导光部的剖面远离所述光接收器的侧边在所述光学膜表面的投影长度，y2为所述第二导光部的剖面靠近所述光接收器的侧边在所述光学膜表面的投影长度。
  8. 根据权利要求7所述的心率检测模组，其特征在于，所述第二导光部满足：15％≤x2/(x2+y2)≤40％。
  9. 根据权利要求7或8所述的心率检测模组，其特征在于，所述第二导光部剖面的高度h2满足：20μm≤h2≤40μm，并且20μm≤x2+y2≤50μm。
  10. 根据权利要求1至9中任一项所述的心率检测模组，其特征在于，所述滤光部包括靠近所述光接收器设置的第三导光部，所述第三导光部用于引导经过所述光学膜射向所述光接收器的干扰光偏离所述光接收器；
    所述第三导光部沿垂直于所述光学膜方向的剖面为直角三角形，所述第三导光部的剖面远离所述光接收器的内角θ满足：5°≤θ≤30°。
  11. 根据权利要求10所述的心率检测模组，其特征在于，所述第三导光部的剖面与所述光学膜接触面的边的长度d3满足：20μm≤d3≤50μm。
  12. 根据权利要求1至11中任一项所述的心率检测模组，其特征在于，所述光学膜的表面设置有与所述挡光部相对应的遮光层。
  13. 根据权利要求1至12中任一项所述的心率检测模组，其特征在于，所述光学膜为一整张光学膜。
  14. 根据权利要求1至13中任一项所述的心率检测模组，其特征在于，所述光源、所述挡光部与所述光接收器被一体化封装。
  15. 一种电子设备，其特征在于，包括电子设备本体和根据权利要求1至14中任一项所述的心率检测模组，所述心率检测模组用于获取用户的心率信号。
  16. 根据权利要求15所述的电子设备，其特征在于，所述心率检测模组与所述电子设备本体可拆卸连接。
PCT/CN2022/087591 2021-04-25 2022-04-19 心率检测模组及电子设备 WO2022228197A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22794668.8A EP4331475A1 (en) 2021-04-25 2022-04-19 Heart rate detection module and electronic device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110449802.0 2021-04-25
CN202110449802.0A CN115227222A (zh) 2021-04-25 2021-04-25 心率检测模组及电子设备

Publications (1)

Publication Number Publication Date
WO2022228197A1 true WO2022228197A1 (zh) 2022-11-03

Family

ID=83665927

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/087591 WO2022228197A1 (zh) 2021-04-25 2022-04-19 心率检测模组及电子设备

Country Status (3)

Country Link
EP (1) EP4331475A1 (zh)
CN (1) CN115227222A (zh)
WO (1) WO2022228197A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117122276A (zh) * 2023-04-28 2023-11-28 荣耀终端有限公司 电子设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016158701A (ja) * 2015-02-27 2016-09-05 セイコーエプソン株式会社 生体情報測定モジュール、および生体情報測定機器
KR20180000158A (ko) * 2016-06-22 2018-01-02 (주)파트론 광학 장치가 설치된 전자 장치 및 전자 장치의 광학 센싱 방법
CN208689385U (zh) * 2017-09-26 2019-04-02 苹果公司 电子手表、电子设备和可穿戴电子设备
CN210155685U (zh) * 2019-06-23 2020-03-17 深圳阜时科技有限公司 生物特征检测系统及其显示装置和背光模组
WO2021041961A1 (en) * 2019-08-28 2021-03-04 Rhythm Diagnostic Systems, Inc. Vital signs or health monitoring systems and methods

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016158701A (ja) * 2015-02-27 2016-09-05 セイコーエプソン株式会社 生体情報測定モジュール、および生体情報測定機器
KR20180000158A (ko) * 2016-06-22 2018-01-02 (주)파트론 광학 장치가 설치된 전자 장치 및 전자 장치의 광학 센싱 방법
CN208689385U (zh) * 2017-09-26 2019-04-02 苹果公司 电子手表、电子设备和可穿戴电子设备
CN210155685U (zh) * 2019-06-23 2020-03-17 深圳阜时科技有限公司 生物特征检测系统及其显示装置和背光模组
WO2021041961A1 (en) * 2019-08-28 2021-03-04 Rhythm Diagnostic Systems, Inc. Vital signs or health monitoring systems and methods

Also Published As

Publication number Publication date
CN115227222A (zh) 2022-10-25
EP4331475A1 (en) 2024-03-06

Similar Documents

Publication Publication Date Title
JP6496256B2 (ja) マルチサイト測定アクセサリー、マルチサイト測定デバイス、及びマルチサイト測定システム
JP5446915B2 (ja) 生体情報検出器及び生体情報測定装置
CN216700554U (zh) 壳体组件、可穿戴设备及电子设备
WO2022228197A1 (zh) 心率检测模组及电子设备
WO2023173860A1 (zh) 盖板及其制备方法、壳体、及电子设备
CN112312826A (zh) 包括具有反射特性的第一光学构件和具有能够吸收由第一光学构件反射的光的吸收特性的第二光学构件的传感器及包括该传感器的电子设备
CN105816185A (zh) 信息取得设备
JP6891441B2 (ja) 検出装置および測定装置
TWI580931B (zh) 光感測器模組及具有該光感測器模組的穿戴裝置
US20230133711A1 (en) Detecting device and measuring device
WO2023077956A1 (zh) 壳体组件、可穿戴设备及电子设备
JP5880536B2 (ja) 生体情報検出器及び生体情報測定装置
WO2022221998A1 (zh) 生物特征检测装置和可穿戴设备
JP2022086227A (ja) 検出装置および測定装置
JP2023125159A (ja) 検出装置および測定装置
CN116840948A (zh) 一种光学透镜、光体积描记器和电子设备
EP2353502A2 (en) Biological information detector and biological information measuring device
JP2023066093A (ja) 検出装置および測定装置
JP2022117114A (ja) 検出装置および測定装置
JP2022131019A (ja) 検出装置および測定装置
CN114795110A (zh) 检测装置和测量装置
JP2023066599A (ja) 検出装置および測定装置
WO2012147452A1 (ja) 光ポインティング装置及びそれを備えた電子機器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22794668

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 18557018

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2022794668

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2022794668

Country of ref document: EP

Effective date: 20231127