Human body detection device

Abstract

A detection device includes a substrate, a light emitter, and a light receiver. The substrate includes a first surface region and a second surface region, wherein a first reflectivity of the first surface region is greater than a second reflectivity of the second surface region. The light emitter is disposed on the first surface region, and the light receiver is disposed on the second surface region, wherein the light receiver and the second surface region have substantially the same reflectivity. This allows the light emitter to efficiently emit detection light, while stray light around the light receiver is absorbed, effectively preventing stray light from interfering with the light receiver.

Description

Technical Field

[0001] This invention relates to a detection device, and more particularly to a detection device for detecting human bodies. Background Technology

[0002] With the advancement of technology, medical testing techniques have progressed from invasive to non-invasive testing.

[0003] During the testing process, some detection devices utilize optical principles to detect the human body, making the accuracy of these devices a key consideration for users when purchasing products. Furthermore, if the detection device is too large, it becomes inconvenient for users to carry or wear. Manufacturers also hope to provide users with a unique experience, breaking away from the structural limitations of existing optical detection devices, thereby attracting consumers' purchasing desire and improving detection accuracy.

[0004] Therefore, how to provide an optical inspection device that can be miniaturized and offer innovative concepts, thereby improving inspection accuracy and product competitiveness, has become one of the important issues. Summary of the Invention

[0005] In view of this, the present invention provides a detection device comprising a substrate, a light emitter, and a light receiver. The substrate includes a first surface region and a second surface region, wherein a first reflectivity of the first surface region is greater than a second reflectivity of the second surface region. The light emitter is disposed on the first surface region. The light receiver is disposed on the second surface region, wherein the light receiver and the second surface region have substantially the same reflectivity.

[0006] In one or more embodiments of the present invention, the light receiver and the second surface region have substantially the same color.

[0007] In one or more embodiments of the present invention, the second surface region surrounds the first surface region.

[0008] In one or more embodiments of the present invention, the first surface region is circular, and the second surface region is annular.

[0009] In one or more embodiments of the present invention, the detection device further includes a first wall body located between a first surface region and a second surface region.

[0010] In one or more embodiments of the present invention, the detection device further includes a second wall extending along the outer edge of the second surface region.

[0011] In one or more embodiments of the present invention, the surface of the first wall facing the light emitter has a first reflectivity, and the surface of the first wall facing the light receiver has a second reflectivity.

[0012] In one or more embodiments of the present invention, the first reflectivity is greater than or equal to 90%, and the second reflectivity is less than or equal to 10%.

[0013] In one or more embodiments of the present invention, the detection device further includes an optical cover, which includes an optical lens and a third wall. The optical lens has an outer surface and an inner surface, and the third wall is disposed on the inner surface of the optical lens. The third wall contacts the first wall to form a space for accommodating a light emitter.

[0014] In one or more embodiments of the present invention, the detection device further includes a fourth wall disposed on the inner surface of the optical lens, the fourth wall contacting the second wall to form a space for accommodating the light receiver.

[0015] In one or more embodiments of the present invention, the light emitter is electrically connected to the substrate via wire bonding or flip-chip bonding.

[0016] In one or more embodiments of the present invention, the optical receiver is electrically connected to the substrate via wire bonding or flip-chip bonding.

[0017] One or more embodiments of the present invention provide a detection device having a substrate, a light emitter and a light receiver. The light emitter is disposed in a region of high reflectivity on the substrate, and the light receiver is disposed in a region of low reflectivity on the substrate. This helps the light emitter to efficiently emit detection light, while stray light around the light receiver can be absorbed, thereby effectively preventing stray light from interfering with the light receiver.

[0018] The above description is only used to illustrate the problem to be solved by the present invention, the technical means to solve the problem, and the effects produced, etc. The specific details of the present invention will be described in detail in the following embodiments and related drawings. Attached Figure Description

[0019] To achieve the aforementioned advantages and features, the principles briefly described above will be explained in more detail with reference to embodiments, which are illustrated in the accompanying drawings. These drawings are merely illustrative of the invention and therefore do not limit the scope of the invention. The principles of the invention will be clearly explained through the drawings, and additional features and details will be fully described, wherein:

[0020] Figure 1 Schematic diagrams of a detection device are shown according to some embodiments of the present invention;

[0021] Figure 2 Draw Figure 1 The diagram shows the internal structure of the detection device.

[0022] Figure 3 Draw Figure 1The diagram shows the internal structure of the detection device. Figure 2 and Figure 3 Each represents a different perspective;

[0023] Figure 4 according to Figure 3 The cross-sectional view is drawn using section lines 3-3;

[0024] Figure 5 A side view of the optical receiver is illustrated according to some embodiments of the present invention; and

[0025] Figure 6 A side view of the optical receiver is shown according to some other embodiments of the present invention.

[0026] [Symbol Explanation]

[0027] 100: Detection device

[0028] 110:Substrate

[0029] 113: First surface region

[0030] 115: Second surface region

[0031] 120: Optical top cover

[0032] 121: Optical Lens

[0033] 127: Third wall

[0034] 127a: Inner wall surface

[0035] 127b: Exterior wall surface

[0036] 129: Fourth wall

[0037] 129a:Inner wall surface

[0038] 130: Light emitter

[0039] 150: Optical Receiver

[0040] 151: Photosensitive area

[0041] 153: Conductive terminal

[0042] 161: First Wall

[0043] 161a:Inner wall surface

[0044] 161b: Exterior wall surface

[0045] 163: Second wall

[0046] 163a:Inner wall surface

[0047] B: Solder pad

[0048] L: Metal wire

[0049] I:Inside

[0050] O: Outside

[0051] S: Solder ball Detailed Implementation

[0052] The following describes several embodiments of the present invention with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. In addition, for the sake of simplicity, some known and conventional structures and elements will be shown in the drawings in a simple schematic manner.

[0053] Please refer to Figure 1 , Figure 1 A schematic diagram of the detection device 100 is shown. In some embodiments of the present invention, the detection device 100 may be a smartwatch, and the detection device 100 may have functions such as detecting blood oxygen concentration or human pulse, but the present invention is not limited thereto. The detection device 100 includes an optical cover 120, a light emitter 130, and a light receiver 150. The light emitter 130 can emit detection light rays through the optical cover 120 onto the human body, and then the detection light rays are reflected by the human body and received by the light receiver 150, thereby performing optical detection on the human body.

[0054] In some embodiments of the present invention, the light emitter 130 may include a light-emitting diode (LED) light source, such as an organic light-emitting diode (OLED), a mini LED, or a micro LED, but the present invention is not limited thereto. In some embodiments of the present invention, the light receiver 150 is configured according to the frequency of the light generated by the light emitter 130. When the light emitter 130 includes a red light source and / or an infrared light source, the light receiver 150 may include a red light sensor and / or an infrared light sensor to detect the blood oxygen concentration of a human body. Additionally, when the light emitter 130 includes a green light source, the light receiver 150 may include a corresponding green light sensor to detect the pulse of a human body.

[0055] Please continue to refer to this. Figures 2 to 4 . Figure 2 Draw Figure 1 The diagram shows the internal structure of the detection device 100. Figure 3 Draw Figure 1The diagram shows the internal structure of the detection device 100. Figure 2 and Figure 3 They represent different perspectives. Figure 4 according to Figure 3 A cross-sectional view of the detection device 100 is drawn using section line 3-3. In some embodiments of the present invention, the detection device 100 includes a substrate 110, which may be embedded inside the detection device 100. The substrate 110 includes a first surface region 113 and a second surface region 115, wherein the first reflectivity of the first surface region 113 is greater than the second reflectivity of the second surface region 115. Furthermore, a light emitter 130 is disposed on the first surface region 113, and a light receiver 150 is disposed on the second surface region 115, wherein the light receiver 150 and the second surface region 115 have substantially the same reflectivity, that is, the reflectivity of the surface of the light receiver 150 is substantially the same as the second reflectivity of the second surface region 115, but the present invention is not limited thereto. Since the second surface region 115 and the light receiver 150 have the same low reflectivity and effectively absorb stray light, the light receiver 150 has excellent light collection performance.

[0056] In some embodiments of the present invention, the substrate 110 may include a rigid substrate, a flexible substrate, a glass substrate, a sapphire substrate, a silicon substrate, a printed circuit board, a metal substrate, or a ceramic substrate, and the present invention is not limited thereto.

[0057] In some embodiments of the present invention, the color of the light receiver 150 is substantially the same as the appearance color of the second surface region 115. Both the second surface region 115 and the light receiver 150 can be black, purple, or blue, thereby absorbing excess light and avoiding interference with the light receiver 150. Furthermore, the first surface region 113 and the second surface region 115 can be colored with double solder resist, thus having different first and second reflectivities, respectively. However, the color of either the first surface region 113 or the second surface region 115 can also be the original color of the substrate 110. For example, when the substrate 110 is purple, the first surface region 113 is colored with solder resist, giving it a white surface, while the second surface region 115 remains purple like the substrate 110. Therefore, the first reflectivity of the first surface region 113 is greater than the second reflectivity of the second surface region 115. Additionally, the first surface region 113 and the second surface region 115 can include an opaque material for blocking light; this opaque material can include light-absorbing or reflective materials.

[0058] Specifically, the light-absorbing material is a dark color that does not easily reflect light. The light-absorbing material can be bismaleimide triazine resin, and may also contain materials that can block visible light, such as black ink, metal, resin, or graphite. Metallic materials can be chromium or nickel. Alternatively, a resin such as polyimide (PI) or acrylic can be used as the main body, and light-absorbing materials, such as carbon, titanium dioxide, or dark pigments, can be dispersed within the resin. The light-absorbing material can comprise a mixture of a matrix and a light-absorbing substance. The matrix can be a silicone-based material or an epoxy-based material. The light-absorbing substance can contain carbon, titanium dioxide, or dark pigments; this invention is not limited to these.

[0059] Reflective materials comprise a mixture of a matrix and a highly reflective substance. The matrix can be a silicone-based material or an epoxy-based material. The highly reflective substance can include titanium dioxide, silicon dioxide, aluminum oxide, potassium titanium dioxide (K₂TiO₃), zirconium dioxide (ZrO₂), zinc sulfide (ZnS), zinc oxide (ZnO), or magnesium oxide (MgO).

[0060] In some embodiments of the present invention, the first reflectivity is greater than or equal to 90%, and the second reflectivity is less than or equal to 10%. In a preferred embodiment, the first reflectivity is greater than or equal to 95%, and the second reflectivity is less than or equal to 5%. In the most preferred embodiment, the first reflectivity is greater than or equal to 99%, and the second reflectivity is less than or equal to 1%. A higher first reflectivity helps to improve the luminous efficiency of the light emitter 130, while a lower second reflectivity helps to improve the light receiving effect of the light receiver 150 and avoid the light receiver 150 being affected by background stray light.

[0061] In some embodiments of the present invention, the second surface region 115 surrounds the first surface region 113, and the first surface region 113 is circular while the second surface region 115 is annular. Furthermore, the detection device 100 includes a plurality of light emitters 130 and a plurality of light receivers 150, with the plurality of light emitters 130 spaced apart from the first surface region 113 and the plurality of light receivers 150 spaced apart from the second surface region 115. This allows the light receivers 150 to have excellent light-gathering performance and significantly saves the space occupied by the light emitters 130 and the light receivers 150.

[0062] In some embodiments of the present invention, the detection device 100 further includes a first wall 161, which is located between the first surface region 113 and the second surface region 115. The first wall 161 spans the boundary between the first surface region 113 and the second surface region 115, thus simultaneously situated on both the first surface region 113 and the second surface region 115. Furthermore, the first wall 161 can be an integrally formed structure or a non-integral formed structure. The first wall 161 surrounds the light emitter 130. The inner wall surface 161a of the first wall 161 facing the light emitter 130 has a first reflectivity, and the outer wall surface 161b of the first wall 161 facing the light receiver 150 has a second reflectivity. Therefore, the first wall 161 prevents the detection light emitted by the light emitter 130 from being directly absorbed by the light receiver 150, thereby avoiding direct crosstalk between the light emitter 130 and the light receiver 150, allowing the light receiver 150 to maintain good light reception.

[0063] In some embodiments of the present invention, the detection device 100 further includes an annular second wall 163 extending along the outer edge of the second surface region 115, and the inner wall surface 163a of the second wall 163 having a second reflectivity lower than the first reflectivity, thereby helping to improve the effect of the light receiver 150 in receiving the detection light. Furthermore, the light receiver 150 is disposed between the first wall 161 and the second wall 163. Since the outer wall surface 161b of the first wall 161 facing the light receiver 150 has a second reflectivity, and the inner wall surface 163a of the second wall 163 also has a second reflectivity, the first wall 161 and the second wall 163 can effectively absorb excess stray light and avoid direct crosstalk between the light emitter 130 and the light receiver 150.

[0064] In some embodiments of the present invention, the first wall 161 and the second wall 163 can be fixed to the substrate 110 by dispensing adhesive. The first wall 161 and the second wall 163 can be made of polymer or resin, such as thermoplastic or thermosetting plastic. Thermoplastic plastics may include polyphthalamide (PPA), acrylonitrile butadiene-styrene copolymer (ABS), polyetheretherketone (PEEK), or other suitable materials. Thermosetting plastics include epoxy molding compound (EMC), silicone molding compound (SMC), or other suitable materials. Furthermore, the first wall 161 and the second wall 163 may also contain the aforementioned opaque material, which may include light-absorbing or reflective materials.

[0065] In some embodiments of the present invention, the detection device 100 further includes an optical cover 120, which includes an optical lens 121 and an annular third wall 127. The optical lens 121 has an outer surface O and an inner surface I, and the third wall 127 is disposed on the inner surface I of the optical lens 121. When the optical cover 120 is fixed to the substrate 110, the third wall 127 contacts the first wall 161 to form a space for accommodating the light emitter 130. The first wall 161 and the third wall 127 have a first reflectivity higher than the second reflectivity, thereby enabling the light emitter 130 to effectively emit detection light toward the human body. Specifically, the third wall 127 is annular and has an inner wall surface 127a and an outer wall surface 127b, wherein the reflectivity of the inner wall surface 127a of the third wall 127 is approximately the same as the first reflectivity, and the reflectivity of the outer wall surface 127b of the third wall 127 is approximately the same as the second reflectivity. Furthermore, the optical lens 121 can be a light-transmitting structure, a lens with light-guiding function, or a light-refracting function. The optical lens 121 is made of transparent plastic or glass, and the outer surface O and inner surface I can be flat, convex, or concave; this invention is not limited thereto.

[0066] In addition, the detection device 100 also includes an annular fourth wall 129, which is disposed on the inner surface I of the optical lens 121 and surrounds the third wall 127. When the optical cover 120 is fixed to the substrate 110, the light receiver 150 is disposed between the third wall 127 and the fourth wall 129, with the fourth wall 129 contacting the second wall 163 to form a space for accommodating the light receiver 150. The second wall 163 and the fourth wall 129 have a low second reflectivity to effectively absorb background stray light, thereby improving the light collection effect of the light receiver 150. Specifically, the reflectivity of the inner wall surface 129a of the fourth wall 129 is approximately the same as the second reflectivity. The third wall 127 and the fourth wall 129 can be fixed to the optical lens 121 by dispensing adhesive, and the materials of the third wall 127 and the fourth wall 129 are approximately the same as those of the first wall 161 and the second wall 163, so they will not be described again here.

[0067] In some embodiments of the present invention, the optical transmitter 130 and the optical receiver 150 may be configured using a wire bonding method or a flip-chip method. Please refer to... Figure 5 , Figure 5 A side view of the light receiver 150 is shown, wherein the light receiver 150 is fixed to the substrate 110 by flip-chip bonding. The light receiver 150 includes a photosensitive area 151 and a conductive terminal 153. The substrate 110 includes a solder pad B, and the conductive terminal 153 is electrically connected to the solder pad B above the substrate 110. A solder ball S above the solder pad B contacts the conductive terminal 153. Therefore, the solder ball S is disposed between the conductive terminal 153 and the solder pad B, so that the light receiver 150 is electrically connected to the substrate 110. The flip-chip light receiver 150 has a photosensitive area 151 facing away from the substrate 110. The photosensitive area 151 has a considerable photosensitive area, thereby improving the light collection effect of the light receiver 150. In some embodiments of the present invention, the light emitter 130 can be transmitted via… Figure 5 The flip-chip method shown is fixed on the substrate 110.

[0068] Please refer to Figure 6 , Figure 6 A side view of the light receiver 150 is illustrated in some other embodiments. The light receiver 150 is fixed to the substrate 110 by wire bonding, wherein the photosensitive area 151 and the conductive end 153 of the light receiver 150 face away from the substrate 110, and the conductive end 153 is electrically connected to the solder pad B and the solder pad B above it via a metal wire L, so that the light receiver 150 is electrically connected to the substrate 110, but the present invention is not limited thereto. In some embodiments of the present invention, the light emitter 130 may be transmitted via… Figure 6 The wire bonding method shown is used to fix the substrate 110.

[0069] Some embodiments of the present invention provide a detection device having a substrate, a light emitter and a light receiver. The light emitter is disposed in a region of high reflectivity on the substrate, and the light receiver is disposed in a region of low reflectivity on the substrate. This helps the light emitter to efficiently emit detection light, while stray light around the light receiver can be absorbed, thereby effectively preventing stray light from interfering with the light receiver.

[0070] Different embodiments of the present invention have been described above. It should be understood that these different embodiments are presented only as examples and not as limitations. Many modifications can be made to the embodiments disclosed herein without departing from the spirit and scope of the invention. Therefore, the breadth and scope of the present invention should not be limited to the embodiments described above.

Claims

1. A human body detection device, characterized in that, include: A substrate includes a first surface region and a second surface region, wherein the first surface region has a first reflectivity greater than the second surface region has a second reflectivity. A light emitter is disposed on the first surface region; A light receiver is disposed on the second surface region, wherein the light receiver and the second surface region have the same reflectivity; and A first wall is located between the first surface region and the second surface region. The surface of the first wall facing the light emitter has the first reflectivity, and the surface of the first wall facing the light receiver has the second reflectivity.

2. The human body detection device according to claim 1, characterized in that, The light receiver has the same color as the second surface area.

3. The human body detection device according to claim 1, characterized in that, The second surface region surrounds the first surface region.

4. The human body detection device according to claim 3, characterized in that, The first surface region is circular, while the second surface region is annular.

5. The human body detection device according to claim 1, characterized in that, It also includes a second wall that extends along the outer edge of the second surface region.

6. The human body detection device according to claim 1, characterized in that, The first reflectivity is greater than or equal to 90%, and the second reflectivity is less than or equal to 10%.

7. The human body detection device according to claim 5, characterized in that, It also includes an optical cover, which includes an optical lens and a third wall. The optical lens has an outer surface and an inner surface, and the third wall is disposed on the inner surface of the optical lens. The third wall contacts the first wall to form a space for accommodating the light emitter.

8. The human body detection device according to claim 7, characterized in that, It also includes a fourth wall, which is disposed on the inner surface of the optical lens and contacts the second wall to form a space for accommodating the light receiver.

9. The human body detection device according to claim 1, characterized in that, The light emitter is electrically connected to the substrate via wire bonding or flip-chip bonding.

10. The human body detection device according to claim 1, characterized in that, The optical receiver is electrically connected to the substrate via wire bonding or flip-chip bonding.

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