Miniature polarized light blood glucose detection module

Abstract

The invention provides a miniature polarized light blood glucose detection module. The miniature polarized light blood glucose detection module comprises an electromagnet assembly, a light emitting assembly and a light receiving assembly. The electromagnet assembly comprises a metal piece and a coil, the metal piece comprises a containing part and a lateral face, the containing part is located within the range of the lateral face, and the coil is wound around the lateral face. The light emitting assembly is embedded in the containing part and comprises a light emitting element and a first polarization element. Light emitted by the light-emitting element penetrates through the first polarization element to generate polarized light, and the light-emitting assembly forms a light-emitting surface. The light receiving assembly is embedded in the accommodating part and is adjacent to the light emitting assembly, and the light receiving assembly comprises a light detection element, a magnetic crystal and a second polarization element. The light detection element receives the polarized light which is reflected and sequentially passes through the magnetic crystal and the second polarization element, and the light receiving assembly forms a light receiving surface.

Description

Technical Field

[0001] The invention relates to a blood sugar detection module, in particular to a blood sugar detection module which combines an electromagnet structure and adopts a polarized light optical component. Background Art

[0002] In recent years, light sources that can emit polarized light have been applied to non-invasive blood glucose detection modules. For example, Chinese invention patent publication number CN1676100A discloses a blood glucose detector. Since glucose in blood glucose has the characteristic of optical rotation, it uses a single polarized light source to rotate the polarization of the light source by an angle after passing through human tissue, and then cooperates with a Faraday rotator to rotate the light source to another specific angle through the Faraday effect. Finally, the penetration intensity of the light source at different angles is received and analyzed by a photosensitive element to obtain the blood glucose concentration of the sample. The Faraday rotator includes a magnet and a magnetic crystal. However, in order for the Faraday rotator to provide the effect of rotating the light source angle, the existing blood glucose detection module using polarized light detection technology must be equipped with a coil structure that can generate an induced magnetic field to surround the outside of the Faraday rotator. The coil structure of this design makes the system end volume become bulky, resulting in the entire blood glucose detection module being unable to meet the requirements of miniaturization and difficult to be applied to wearable devices.

[0003] Therefore, how to design a blood glucose detection module that can improve the above-mentioned problems is indeed a topic worthy of study. Summary of the invention

[0004] The object of the present invention is to provide a micro polarized light blood sugar detection module which combines an electromagnet structure and adopts a polarized light optical component.

[0005] In order to achieve the above-mentioned purpose, the micro polarized light blood glucose detection module of the present invention includes an electromagnet component, a light emitting component and a light receiving component. The electromagnet component includes a metal part and a coil, the metal part includes a housing portion and a lateral surface, the housing portion is located within the range of the lateral surface, and the coil is wound around the lateral surface. The light emitting component is embedded in the housing portion and includes a light emitting element and a first polarizing element. The light emitted by the light emitting element passes through the first polarizing element to generate polarized light, and the light emitting component forms a light emitting surface. The light receiving component is embedded in the housing portion and adjacent to the light emitting component, and the light receiving component includes a light detection element, a magnetic crystal and a second polarizing element. The light detection element receives the polarized light that is reflected and passes through the magnetic crystal and the second polarizing element in sequence, and the light receiving component forms a light receiving surface.

[0006] In one embodiment of the present invention, the metal component further includes a first surface and a second surface opposite to each other, the lateral surface is located between the first surface and the second surface, and the light emitting surface of the light emitting component, the light receiving surface of the light receiving component and the first surface are located on the same plane.

[0007] In an embodiment of the present invention, the accommodation portion is a groove sunken from the first surface toward the second surface, and the depth of the groove is smaller than the height of the metal component.

[0008] In one embodiment of the present invention, the accommodating portion is a through hole penetrating from the first surface to the second surface.

[0009] In one embodiment of the present invention, the metal piece is made of soft magnetic material or hard magnetic material.

[0010] In one embodiment of the present invention, the wavelength range corresponding to the light emitting element is between 500 nm and 1800 nm.

[0011] In one embodiment of the present invention, the light emitting element is a vertical cavity surface emitting laser or a light emitting diode.

[0012] In one embodiment of the present invention, the magnetic crystal is made of a material that can generate a magnetization phenomenon under the influence of an external magnetic field.

[0013] In one embodiment of the present invention, the light emitting component further includes a first cover plate, and the first cover plate is arranged on the side of the first polarizing element facing away from the light emitting element; the light receiving component further includes a second cover plate, and the second cover plate is arranged on the side of the magnetic crystal facing away from the light detecting element.

[0014] In one embodiment of the present invention, the first cover plate and the second cover plate are made of glass or plastic material.

[0015] In one embodiment of the present invention, the light-emitting component further includes a first substrate and a first light-shielding structure, the light-emitting element and the first light-shielding structure are arranged on the first substrate, and the first light-shielding structure is located around the light-emitting element; the light-receiving component further includes a second substrate and a second light-shielding structure, the light-detecting element and the second light-shielding structure are arranged on the second substrate, and the second light-shielding structure is located around the light-detecting element.

[0016] In one embodiment of the present invention, the first light shielding structure and the second light shielding structure are made of non-transparent epoxy resin.

[0017] Accordingly, the micro polarized light blood glucose detection module of the present invention can directly drive the magnetic crystal of the light receiving component to change the polarization angle of light through the electromagnet component. Compared with the existing polarized light blood glucose detection module, the module volume can be effectively reduced to achieve module miniaturization. Moreover, compared with the Faraday rotator, the electromagnet component can significantly enhance the Faraday effect on the magnetic crystal, thereby enhancing the difference between light signals to improve the accuracy of blood glucose detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic diagram of a first embodiment of a micro polarized light blood glucose detection module according to the present invention.

[0019] Figure 2 It is a top view of the first embodiment of the micro polarized light blood glucose detection module of the present invention.

[0020] Figure 3 FIG. 4 is a schematic diagram of a second embodiment of a micro polarized light blood glucose detection module according to the present invention.

[0021] Description of reference numerals:

[0022] 1. 1a Micro polarized light blood glucose detection module

[0023] 10. Electromagnet assembly

[0024] 11 Metal parts

[0025] 111 Accommodation part

[0026] 112 Lateral surface

[0027] 113 Page 1

[0028] 114 Side 2

[0029] 12 Coil

[0030] 20 Light output components

[0031] 21. First substrate

[0032] 22 Light-emitting element

[0033] 23. First polarizing element

[0034] 24. First light shielding structure

[0035] 25 First cover

[0036] 26 Light emitting surface

[0037] 27 First packaging structure

[0038] 30 Light receiving component

[0039] 31 Second substrate

[0040] 32 Light detection element

[0041] 33. Second polarizing element

[0042] 34 Magnetic crystals

[0043] 35. Second light shielding structure

[0044] 36 Second cover

[0045] 37 Finishing surface

[0046] 38 Second packaging structure

[0047] D Depth

[0048] H Height. DETAILED DESCRIPTION

[0049] Since the various aspects and embodiments are only exemplary and non-limiting, after reading this specification, ordinary technicians may also come up with other aspects and embodiments without departing from the scope of the present invention. According to the following detailed description and claims, the features and advantages of the embodiments will be more prominent.

[0050] In this document, "a" or "an" is used to describe the elements and components described herein. This is only for convenience of description and to provide a general meaning to the scope of the present invention. Therefore, unless it is obvious that it is otherwise intended, such description should be understood to include one or at least one, and the singular also includes the plural.

[0051] In this article, the terms "first" or "second" and the like ordinal numbers are mainly used to distinguish or refer to the same or similar elements or structures, and do not necessarily imply the order of these elements or structures in space or time. It should be understood that in some cases or configurations, the ordinal numbers can be used interchangeably without affecting the implementation of the present invention.

[0052] As used herein, the terms "include", "have" or any other similar terms are intended to cover a non-exclusive inclusion. For example, an element or structure containing multiple elements is not limited to only those elements listed herein, but may include other elements that are not explicitly listed but are generally inherent to the element or structure.

[0053] Please refer to Figure 1 and Figure 2 ,in Figure 1 is a schematic diagram of a first embodiment of a micro polarized light blood glucose detection module of the present invention, Figure 2 FIG. 1 is a top view of the first embodiment of the micro polarized light blood glucose detection module of the present invention. Figure 1 and Figure 2 As shown, the micro polarized light blood glucose detection module 1 of the present invention includes an electromagnet component 10, a light emitting component 20 and a light receiving component 30, and the light emitting component 20 and the light receiving component 30 are arranged on the electromagnet component 10. The electromagnet component 10 mainly generates an induced magnetic field by supplying current. The light emitting component 20 mainly generates polarized light to irradiate the skin. The light receiving component 30 mainly receives the polarized light transmitted back after diffuse reflection from the skin.

[0054] The electromagnet assembly 10 includes a metal part 11 and a coil 12. The metal part 11 serves as the basic structural part of the electromagnet assembly 10, and the metal part 11 is a three-dimensional block structure. In terms of appearance design, the lateral outer contour of the metal part 11 can be circular, elliptical, rectangular or other shapes. For example, the present embodiment is elliptical, but the present invention is not limited thereto. In the present invention, the metal part 11 can be made of soft magnetic materials (such as iron, iron-cobalt alloy, iron-silicon steel, iron-nickel alloy, etc.) or hard magnetic materials (such as ferrite, neodymium iron boron, etc.) according to different needs. The metal part 11 includes a receiving portion 111, a lateral surface 112, and a first surface 113 and a second surface 114 opposite to each other. The first surface 113 and the second surface 114 are two planes parallel to each other, and the lateral surface 112 is located between the first surface 113 and the second surface 114. The accommodating portion 111 forms an accommodating space for arranging the light emitting component 20 and the light receiving component 30, and the accommodating portion 111 is located within the range surrounded by the lateral surface 112 (or the lateral outer contour of the metal component 11). In other words, the surroundings of the accommodating portion 111 are all spaced apart from the lateral surface 112. In this embodiment, the accommodating portion 111 is a groove that is recessed from the first surface 113 toward the second surface 114, and the depth D of the groove is less than the height H of the metal component 11. In other words, the bottom surface of the groove-shaped accommodating portion 111 is spaced apart from the second surface 114.

[0055] The coil 12 is wound around the lateral surface 112 of the metal part 11. The total number of windings formed by the coil 12 on the lateral surface 112 is between 1 and 300. As the total number of windings of the coil 12 is different, the current passed through the coil will also be adjusted accordingly. Generally, the current will be between 1 and 100 mA (milliamperes). In this embodiment, the total number of windings of the coil 12 is about 50, but the present invention is not limited thereto. In addition, the coil 12 can use metal wires of different wire diameters according to the design. For example, an enameled wire with a wire diameter of AWG38 (equivalent to a wire diameter of 0.102 mm) can be used, or an electric wire with a wire diameter of AWG33 to 46 (equivalent to a wire diameter of 0.18 to 0.041 mm) can be used, and a current of 15 mA is passed through the coil to generate a corresponding induced magnetic field, but the present invention is not limited thereto.

[0056] The light emitting component 20 is embedded in the accommodating portion 111 of the metal component 11, and the light emitting component 20 includes a first substrate 21, a light emitting element 22 and a first polarizing element 23. The first substrate 21 serves as the basic structural component of the light emitting component 20, and the first substrate 21 can be used to carry the light emitting element 22, the first polarizing element 23 and other related components. The light emitting element 22 is disposed on the first substrate 21, and the light emitting element 22 serves as a light source to emit light. The light emitting element 22 can be electrically connected to the first substrate 21 through a metal wire. In the present invention, the light emitting element 22 uses a laser diode, such as a vertical cavity surface emitting laser (VCSEL), but the present invention is not limited thereto. For example, the light emitting element 22 can also use a light emitting diode (LED) or other types of light sources. The wavelength range corresponding to the light emitting element 22 is approximately between 500nm and 1800nm. For example, in one embodiment of the present invention, the wavelength corresponding to the light emitting element 22 can be 650nm. The first polarizing element 23 is disposed on the emission path of the light emitted by the light emitting element 22, for example, directly above the light emitting element 22, so that the light generates linearly polarized light after passing through the first polarizing element 23. In the present invention, the first polarizing element 23 is made of polymer or metal material, but the present invention is not limited thereto.

[0057] In one embodiment of the present invention, the light emitting component 20 further includes a first light shielding structure 24. The first light shielding structure 24 is disposed on the first substrate 21 and is located around the light emitting element 22. The first light shielding structure 24 is mainly used to block the lateral scattering of the light emitted by the light emitting element 22, so that the light can be concentrated and emitted toward the first polarizing element 23. The first light shielding structure 24 is made of non-transparent epoxy, such as packaging black glue, but the present invention is not limited thereto.

[0058] In one embodiment of the present invention, the light emitting assembly 20 further includes a first cover plate 25. The first cover plate 25 is stacked on the first polarizing element 23, and the side of the first cover plate 25 facing away from the first polarizing element 23 (i.e., the side facing the skin) forms a light emitting surface 26 of the light emitting assembly 20. The first cover plate 25 serves as a protective member of the light emitting assembly 20, and the first cover plate 25 is made of light-transmissive glass or plastic material, but the present invention is not limited thereto.

[0059] In addition, the light emitting component 20 may also fill packaging materials between the first substrate 21, the first polarizing element 23 and the first light shielding structure 24 to form a first packaging structure 27. The first packaging structure 27 is used to package and fix the light emitting element 22 and related metal wires. The first packaging structure 27 is made of light-transmissive epoxy, but the present invention is not limited thereto.

[0060] In terms of design, the light emitting component 20 is positioned after being embedded in the receiving portion 111 of the metal component 11, and the light emitting surface 26 of the light emitting component 20 and the first surface 113 of the metal component 11 are coplanar, thereby maintaining the flatness and consistency of the appearance surface of the overall structure.

[0061] The light receiving component 30 includes a second substrate 31, a light detecting element 32, a second polarizing element 33 and a magnetic crystal 34. The second substrate 31 serves as the basic structural component of the light receiving component 30, and the second substrate 31 can be used to carry the light detecting element 32, the second polarizing element 33, the magnetic crystal 34 and other related components. The light detecting element 32 is disposed on the second substrate 31, and the light detecting element 32 is used to receive reflected light for subsequent detection. The light detecting element 32 can be electrically connected to the second substrate 31 through a metal wire. In the present invention, the light detecting element 32 adopts a photo detector (Photo Detector), but the present invention is not limited to this. The second polarizing element 33 is disposed on the incident path of the reflected light received by the light detecting element 32, for example, directly above the light detecting element 32. In the present invention, the second polarizing element 33 is made of a polymer or metal material, but the present invention is not limited to this. The magnetic crystal 34 is stacked on the second polarizing element 33 and is also located on the incident path of the reflected light received by the light detecting element 32, for example, directly above the light detecting element 32, so that the reflected light passes through the magnetic crystal 34 and the second polarizing element 33 in sequence before being received by the light detecting element 32. The magnetic crystal 34 is mainly used to change the polarization angle of the reflected light, and the magnetic crystal 34 can rotate the crystal through an external magnetic field. Therefore, the magnetic crystal 34 is made of a material that can produce a magnetization phenomenon under the influence of an external magnetic field. In the present invention, the magnetic crystal 34 uses a magneto-optical Faraday rotator garnet crystal as a rotating crystal for the polarization angle of the reflected light, but the magnetic crystal 34 can also use other crystals that can apply a variable magnetic field or electric field to control the crystal to rotate the polarization angle of the incident light, such as liquid crystal.

[0062] In one embodiment of the present invention, the light receiving component 30 further includes a second light shielding structure 35. The second light shielding structure 35 is disposed on the second substrate 31 and is located around the light detection element 32. The second light shielding structure 35 is mainly used to block the lateral scattering of the reflected light after passing through the magnetic crystal 34 and the second polarizing element 33 in sequence, so that the reflected light can be concentrated and received by the light detection element 32; and to prevent ambient light from entering the light detection element 32 from the side. The second light shielding structure 35 is made of non-transparent epoxy, such as packaging black glue, but the present invention is not limited to this.

[0063] In one embodiment of the present invention, the light receiving assembly 30 further includes a second cover plate 36. The second cover plate 36 is stacked on the magnetic crystal 34, and the side of the second cover plate 36 facing away from the magnetic crystal 34 (i.e., the side facing the skin) forms a light receiving surface 37 of the light receiving assembly 30. The second cover plate 36 serves as a protective member of the light receiving assembly 30, and the second cover plate 36 is made of light-transmissive glass or plastic material, but the present invention is not limited thereto.

[0064] In addition, the light receiving component 30 can also fill the packaging material between the second substrate 31, the second polarizing element 33 and the second light shielding structure 35 to form a second packaging structure 38. The second packaging structure 38 is used to package and fix the light detection element 32 and related metal wires. The second packaging structure 38 is made of a light-transmissive epoxy resin, but the present invention is not limited thereto.

[0065] In terms of design, the light receiving component 30 is positioned after being embedded in the receiving portion 111 of the metal component 11, and the light receiving surface 37 of the light receiving component 30 and the first surface 113 of the metal component 11 are coplanar, thereby maintaining the flatness and consistency of the appearance surface of the overall structure. In other words, the light emitting surface 26 of the light emitting component 20, the light receiving surface 37 of the light receiving component 30 and the first surface 113 of the metal component 11 are located on the same plane.

[0066] In actual operation, the micro polarized light blood glucose detection module 1 of the present invention first emits light through the light emitting element 22 of the light emitting component 20, and the light will sequentially pass through the first polarizing element 23 and the first cover plate 25 and produce polarized light before arriving to perform corresponding blood glucose detection on the glucose in human tissue. Afterwards, the light reflected from the glucose in the skin will sequentially pass through the second cover plate 36, the magnetic crystal 34 and the second polarizing element 33 of the light receiving component 30 and then be received by the light detection element 32 to perform subsequent signal analysis and processing for blood glucose detection. Among them, by passing current through the coil 12 of the electromagnet component 10, the electromagnet component 10 generates an induced magnetic field, which in turn affects the magnetic crystal 34 to produce crystal rotation to change the angle of the polarization direction of the light source.

[0067] In order to achieve miniaturized size design, in the present embodiment, it is assumed that the length and width of the light emitting component 20 and the light receiving component 30 are both x mm, and the height is h mm. The major axis corresponding to the metal part 11 with an elliptical lateral outer contour is 3x mm, and the minor axis is between 2x mm and 3x mm. The height H of the metal part 11 is not less than h mm, and the length of the accommodating portion 111 of the metal part 11 is x+0.1 mm, the width is 2x+0.1 mm, and the height is h+0.1 mm. For example, when x is 5 mm, the overall volume of the micro-polarized light blood glucose detection module 1 of the present invention can meet the requirements of miniaturization, which is advantageous for application in wearable devices, and can perform blood glucose detection on the skin surface of any part of the body.

[0068] Please refer to Figure 3 FIG. 2 is a schematic diagram of a second embodiment of the micro polarized light blood glucose detection module of the present invention. This embodiment is a variation of the first embodiment described above, and mainly changes the structure of the receiving portion of the metal member. Figure 3 As shown, in this embodiment, the receiving portion 111 of the metal member 11 of the electromagnet assembly 10 of the micro polarized light blood glucose detection module 1a of the present invention is a through hole that passes from the first surface 113 to the second surface 114. In terms of design, the height H of the metal member 11 is equal to the height of the light emitting assembly 20 and the light receiving assembly 30. When the light emitting assembly 20 and the light receiving assembly 30 are embedded in the receiving portion 111 of the metal member 11, they are positioned. At this time, the light emitting surface 26 of the light emitting assembly 20, the light receiving surface 37 of the light receiving assembly 30 and the first surface 113 of the metal member 11 are coplanar, and the bottom surface of the first substrate 21 of the light emitting assembly 20, the bottom surface of the second substrate 31 of the light receiving assembly 30 and the second surface 114 of the metal member 11 are coplanar, thereby not only maintaining the flatness and consistency of the appearance surface of the overall structure, but also reducing the height H of the metal member 11 compared to the aforementioned first embodiment to further meet the thinness requirements and improve the flexibility of module setting.

[0069] The above embodiments are essentially only auxiliary explanations, and are not intended to be used to limit the embodiments of the application subject or the application or use of the embodiments. In addition, although at least one exemplary embodiment has been proposed in the aforementioned embodiments, it should be understood that the present invention can still have a large number of changes. It should also be understood that the embodiments described herein are not intended to limit the scope, use or configuration of the requested application subject in any way. On the contrary, the aforementioned embodiments will provide a simple guide for those of ordinary skill in the art to implement one or more of the embodiments described. Furthermore, various changes can be made to the functions and arrangements of the components without departing from the scope defined by the claims, and the claims include known equivalents and all foreseeable equivalents at the time of the present application.

Claims

1. A micro polarized light blood glucose detection module, include: An electromagnet assembly includes a metal piece and a coil, wherein the metal piece includes a receiving portion and a lateral surface, the receiving portion is located within the range of the lateral surface, and the coil is wound around the lateral surface; a light emitting component embedded in the accommodating portion, the light emitting component comprising a light emitting element and a first polarizing element, the light emitted by the light emitting element passes through the first polarizing element to generate polarized light, and the light emitting component forms a light emitting surface; and A light receiving component is embedded in the accommodating portion and adjacent to the light emitting component. The light receiving component includes a light detecting element, a magnetic crystal and a second polarizing element. The light detecting element receives the polarized light that is reflected and passes through the magnetic crystal and the second polarizing element in sequence, and the light receiving component forms a light receiving surface.

2. A micro polarized light blood glucose detection module as described in claim 1, wherein the metal part further includes a first surface and a second surface opposite to each other, the lateral surface is located between the first surface and the second surface, and the light emitting surface of the light emitting component, the light receiving surface of the light receiving component and the first surface are located on the same plane.

3. The micro polarized light blood glucose detection module as described in claim 2, wherein the accommodating portion is a groove recessed from the first surface toward the second surface, and a depth of the groove is less than a height of the metal member. 4 . The micro polarized light blood glucose detection module as claimed in claim 2 , wherein the receiving portion is a through hole extending from the first surface to the second surface.

5. The micro polarized light blood glucose detection module as claimed in claim 1, wherein the metal piece is made of soft magnetic material or hard magnetic material.

6. The micro polarized light blood glucose detection module as claimed in claim 1, wherein the wavelength range corresponding to the light emitting element is between 500 nm and 1800 nm. 7 . The micro polarized light blood glucose detection module as claimed in claim 6 , wherein the light emitting element is a vertical cavity surface emitting laser or a light emitting diode.

8. The micro polarized light blood glucose detection module as claimed in claim 1, wherein the magnetic crystal is made of a material that can generate a magnetization phenomenon under the influence of an external magnetic field.

9. A micro-polarized light blood glucose detection module as described in claim 1, wherein the light emitting component further includes a first cover plate, and the first cover plate is arranged on the side of the first polarizing element facing away from the light emitting element; the light receiving component further includes a second cover plate, and the second cover plate is arranged on the side of the magnetic crystal facing away from the light detection element.

10. The micro polarized light blood glucose detection module as claimed in claim 9, wherein the first cover plate and the second cover plate are made of glass or plastic material.

11. A micro polarized light blood glucose detection module as described in claim 1, wherein the light emitting component further includes a first substrate and a first shading structure, the light emitting element and the first shading structure are arranged on the first substrate, and the first shading structure is located around the light emitting element; the light receiving component further includes a second substrate and a second shading structure, the light detecting element and the second shading structure are arranged on the second substrate, and the second shading structure is located around the light detecting element. 12 . The micro polarized light blood glucose detection module as claimed in claim 11 , wherein the first light shielding structure and the second light shielding structure are made of non-transparent epoxy resin.

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