TW201730521A - Optical sensor module and wearable device using the same - Google Patents

Abstract

This invention provides an optical sensor module, which includes a supporting frame, a light-receiving unit, and two light-emitting units. The supporting frame comprises a main base and two side bases which are angled with the main base. The light-receiving unit comprises a photodetector which is disposed on the main base and a first light-blocking layer which surrounding the photodetector and connecting the side bases. The photodetector has a light-receiving surface, and the first light-blocking layer has an opening that corresponding the light-receiving surface. Each of the light-emitting unit has a light-emitting device which has a light-emitting surface. Defining a first line which is perpendicular to the light-receiving surface, the light which is emitted from the light-emitting unit is focused to the first line. In addition, this invention also provides a wearable device which has the optical sensor module.

Description

Photo sensor module and wearable device having the same

The invention relates to a sensor module and a device for wearing the device with the sensing module, in particular to a light sensor module and a wearing device having the light sensor module.

Modern people pay attention to the concept of health management and the prevalence of wearable devices, so that health-related wearable devices such as sports watches and bracelets are booming. Most of the existing wisdom bracelets use non-invasive methods to measure the health information of the human body. This method has the advantages of easy access to data and no restrictions on human body type.

In general, the most common non-invasive methods are optical measurement. For example, a 37-degree wristband that has been sold in the market, that is, a light-emitting member in the wristband is incident on the skin of the user, and then The light emitted by the illuminating member is reflected back to a light receiving member in the wristband by skin tissue in the skin, and transmitted to a processor in the wristband for analysis.

Since the light emitted by the illuminating member is scattered in all directions, and the illuminating member and the light receiving member are disposed on the same plane, the reflected light cannot effectively enter the light receiving member, and further, because the illuminating member is The laterally emitted light also enters the light receiving member, which affects the measurement and analysis errors. Therefore, in order to prevent the light emitted by the illuminating member from interfering with the light receiving member, a black light blocking wall is further formed between the adjacent illuminating member and the light receiving member to prevent non-measured light from being incident on the light receiving member. Impact. However, there is still no way to avoid the disadvantage that reflected light cannot effectively enter the light receiving member.

Accordingly, it is an object of the present invention to provide a photosensor module that can improve light collection efficiency.

Therefore, the photo sensor module of the present invention comprises: a support frame, a receiving unit, and two light emitting units.

The support frame comprises a plate body and two side plates disposed on opposite sides of the plate body at an angle to the plate body.

The receiving unit includes a light receiving member disposed on the board body, and a first light blocking layer covering the light receiving member and connected to the side plate body, the light receiving member having a side opposite to the side plate body In the smooth surface, the first light blocking layer has a pair of openings to be received by the light receiving surface.

The light-emitting units are respectively disposed on the two side plates and located on opposite sides of the light-receiving member, and each of the light-emitting units includes at least one light-emitting member having a light-emitting surface, and the light-receiving portion of the light-receiving member is defined a first straight line of the surface, the first straight line, and the light emitted by each of the light emitting units is concentrated toward the first straight line.

Further, another object of the present invention is to provide a wearing device.

Therefore, the wearing device of the present invention is suitable for being worn on a user and contacting the skin of the user, and measuring the light volume change tracing signal, the wearing device comprising a fixed base, a circuit board, and the Light sensor module.

The fixed base includes a cover having a transparent outer cover that is in contact with the skin of the user, and a securing portion that is coupled to the cover to be attached to the user.

The circuit board is fixed in the casing.

The photo sensor module is disposed on the circuit board and located between the transparent outer cover and the circuit board.

The utility model has the advantages that the light-emitting unit and the receiving unit are located at different planes by arranging the side plate body at an angle with the plate body, thereby forming a stereoscopic oblique light-emitting structure, so that the reflected light can enter the receiving body more effectively. The unit can improve the efficiency and accuracy of the measurement of the photo sensor module.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 and FIG. 2, an embodiment of the optical sensor module 2 of the present invention includes a receiving unit 22, two light emitting units 23 on opposite sides of the receiving unit 22, and a connecting unit and a light emitting unit. 23 support frame 21.

The support frame 21 includes a plate body 211 and two side plate bodies 212 disposed on opposite sides of the plate body 211 and disposed at an angle to the plate body 211. The plate body 211 has a first folding leg portion 213 which is different from the opposite sides of the side plate body 212 in the y direction and the opposite y direction. The side plate body 212 has two sides in the x direction and the opposite x direction. a bridge portion 215 extending toward the two plate bodies 211, and a second leg portion 214 extending from the two bridge portions 215 in the y direction and the opposite y direction, respectively, and extending in the same direction as the first leg portions 213 The first leg portions 213 and the second leg portions 214 are in contact with each other and are electrically separated.

Specifically, the support frame 21 is made of the same metal sheet material. Therefore, the side plate bodies 212 can be formed by bending the bridge portions 215 in the z direction and toward the plate body 211 to form a 3D three-dimensional structure. Preferably, the metal material constituting the support frame 21 of the present embodiment is exemplified by copper having good heat dissipation and high plasticity, but is not limited thereto.

The receiving unit 22 includes a light receiving member 221 disposed on the board 211, a first transparent encapsulant 222, and a first light blocking layer 223. The light receiving member 221 has two side surfaces 224 adjacent to the two side plates 212, and a light receiving surface 225 connected to the two side surfaces 224 and away from the board body 211. The light receiving surface 225 can be used to receive the outside world. Optical signal. The first transparent encapsulant 222 covers the light receiving member 221 and has a first top surface 226 above the light receiving surface 225 of the light receiving member 211. The first light blocking layer 223 covers the first transparent encapsulant 222 on the circumferential surface of the light receiving member 221 and exposes the first top surface 226 of the transparent encapsulant 222.

In the embodiment, the photo sensor module 2 is mainly used for detecting health information of a human body. Therefore, the light receiving member 221 suitable for the embodiment is capable of receiving and detecting photoplethysmography (photoplethysmography, PPG) Signal detector.

In detail, the bridging portions 215 are connected to the two plate bodies 211 and connected to the first light blocking layer 223. The first transparent encapsulant 222 is also covered by the light receiving member 221. And covering the board body 211, but the first leg portion 213 and the second leg portions 214 are exposed to protrude from the first transparent encapsulant 222 and the first light blocking layer 223 for For the subsequent electrical connection, the first light blocking layer 223 further extends from the circumferential surface of the first transparent encapsulant 222 to the first top surface 226 of the first transparent encapsulant 222, and the first top surface is The portion 226 is partially exposed to form an opening corresponding to the light receiving surface 225. By allowing the first light blocking layer 223 to partially expose the first top surface 226, the light receiving member 221 can be prevented from directly receiving the light emitted by the adjacent light emitting unit 23, thereby affecting the measurement result.

The light-emitting units 23 are symmetrically disposed on the side plate body 212 and located on opposite sides of the light-receiving member 221 . Specifically, in the embodiment, each of the light-emitting units 23 includes two light-emitting members 231, a second transparent encapsulant 232, a second light-blocking layer 233, and a transparent encapsulant 232. Lens 234.

Each of the illuminating members 231 has a light-emitting surface 235. The second transparent encapsulant 232 covers the illuminating members 231 and has a light-emitting surface 235 away from the illuminating member 231. Two top faces 236. The second light blocking layer 233 covers the second transparent encapsulant 232 on the peripheral surface of the illuminating member 231, and exposes the second top surface 236 of the second transparent encapsulant 232, so that the illuminating member 231 emits The light energy is positively emitted from the second top surface 236 to the outside. The lens 234 is disposed on the second top surface 236 of the second transparent encapsulant 232 to improve the light efficiency of the illuminating member 231.

It is to be noted that the light color of the light-emitting unit 23 and the number of the light-emitting members 231 are not particularly limited, and the light color of the light-emitting unit 23 can be adjusted and the number of the light-emitting members 231 can be increased or decreased. In order to obtain more accurate health information of the human body, the present invention is to provide two light-emitting members 231 for emitting green light having a wavelength between 520 nm and 535 nm and orange light having a wavelength between 587 nm and 597 nm, respectively. The photo sensor module 2 is used for detection.

It should be noted that the material selection of the first light blocking layer 223 and the second light blocking layer 233 is mainly required for its light absorbing material, for example, a dark resin material or a black matrix photoresist (black matrix (BM). Resistance), but not limited thereto, as long as the light source can be effectively blocked and absorbed, the same or different materials can be used; and the first transparent encapsulant 222 and the second transparent encapsulant 232 can be used, for example, epoxy. A material that can transmit light, such as a resin or an acrylic resin, which can be the same or different materials. In this embodiment, the first light blocking layer 223 and the second light blocking layer 233 are made of black epoxy resin, and the first transparent encapsulant 222 and the second transparent encapsulant 232 are transparent. Epoxy resin is taken as an example.

It is worth mentioning that the first leg portions 213 in the middle of each side are electrically connected to the light receiving member 221 disposed on the plate body 211, and the outermost sides are located at the outermost sides. The second folding leg portion 214 is electrically connected to the adjacent light emitting members 231 respectively disposed on the side plate body 212. The first receiving portion 213 is electrically connected to the light receiving member 221, and the second folding portion 214 is electrically coupled to the light emitting member 231, which can be electrically controlled independently, and can be further simplified for subsequent application in the device. The design of electrical lines.

Referring to FIG. 3A to FIG. 3E , a manufacturing process of the photo sensor module 2 of the present invention is substantially as shown in FIG. 3A to FIG. 3E . First, as shown in FIG. 3A, a metal piece 20 made of a metal such as copper and having the structure of the support frame 21 is prepared. In detail, the plate body 211 further has two plate body portions 210 which are spaced apart from each other and are substantially located at a central position of the metal piece 20. The two first leg portions 213 of the plate body 211 are respectively formed by the two plates. The opposite sides of the body 210 extend in the y direction and in the opposite y direction. The side plate bodies 212 are respectively located on opposite sides of the plate body 211 in the x direction, and each of the side plate bodies 212 further has two side plate body portions 216 spaced apart from each other, the two of the side plate bodies 212. The bridge portion 215 extends from the two side plate body portions 216 toward the plate body portion 210 in the x direction and the opposite x direction, respectively, but the bridge portions 215 are not in contact with the plate body portions 210, and each of the side plates The two second leg portions 214 of the body 212 are respectively extended in the same direction by the one end of the two bridging portions 215 in the y direction and the opposite y direction and parallel to the first leg portions 213, and the first folding portions The leg portion 213 and the second leg portion 214 are not in contact with each other. In addition, in the shape of the board portion 210, the bridge portion 215 and the second leg portion 214 have a corner structure 217 for providing a large accommodation space for the light receiving member 221 .

Then, as shown in FIG. 3B, the light receiving member 221 is fixed on at least one of the plate portions 210 of the plate body 211, and the light receiving member 221 and the plate body portion are connected by wire bonding or other electrical connection. The two light-emitting members 231 are disposed on at least one of the side plate portions 216 of each of the side plates 212, and the light-emitting members 231 are electrically connected to the side plate portions 216. Then, as shown in FIG. 3C and FIG. 3D, the first folding leg portion 213 and the portion covering the light receiving member 221, the plate body portion 210, a portion of the bridge portion 215, and the portion are formed. The first transparent encapsulant 222 of the second leg portion 214, and the second transparent encapsulant 232 covering the illuminating members 231 and the side plate portions 216, and on the second transparent encapsulant 232 After the lens 234 is formed, the first light blocking layer 223 and the second light blocking layer 233 are respectively formed on the first transparent encapsulant 222 and the second transparent encapsulant 232 to constitute the receiving unit 22 and the illuminating Unit 23. Finally, as shown in FIG. 3E, since the support frame 21 is made of the same piece of plastic metal sheet 20, the side plate portions 216 of each of the side plates 212 are bridged by the same. The portion 215 is bent in the z direction toward the receiving unit 22 to be at an angle to the plate 211. Further, when the light-emitting units 23 on both sides of the receiving unit 22 are the same light-emitting elements 231, the bending angles of the bridge portions 215 are preferably symmetrical. And the first folding leg portions 213 and the second folding leg portions 214 of the receiving unit 22 are opposite to the opposite side edges of the side plate body 212 are cut and bent, and finally the rest of the metal piece 20 is Partially cut off, the photosensor module 2 shown in FIG. 1 can be formed.

Referring to FIG. 4 and FIG. 5, the aforementioned photo sensor module 2 is mainly applied to a wearing device to form a wearing device 6 as shown in FIG. The wearable device 6 is adapted to be worn on a user 100 in contact with the skin of the user 100 and to measure a light volume change trace (PPG) signal. The wearable device 6 includes a fixed base 3 , a circuit board 4 disposed in the fixed base 3 , the photo sensor module 2 disposed on the circuit board 4 , and a circuit board 4 disposed on the circuit board 4 . The processing unit 5 is located on opposite sides of the photosensor module 2 .

Specifically, the fixed base 3 includes a cover 31 having a transparent outer cover 311 that can be in contact with the skin of the user 100, and a fixing that can be attached to the user 100 by attaching the cover 31. Part 32. Specifically, the aspect of the cover 31 and the fixing portion 32 is not particularly limited. The present invention is to design the fixed base 3 as a watch or a wristband. Therefore, the fixing portion 32 is respectively The opposite ends of the casing 31 extend in an arc shape and can be attached to the wrist of the user 100.

The circuit board 4 is fixed in the casing 31, and the fixing manner thereof is not particularly limited as long as it can be fixed in the casing 31. Preferably, the circuit board 4 of the present invention is parallel and transparent. The cover 311 is fixed in the casing 31.

When the photo sensor module 2 is installed in the casing 31, the first leg portion 213 and the second leg portion 214 are electrically connected to the device. The surface of the circuit board 4 is located between the transparent outer cover 311 and the circuit board 4, and the receiving unit 22 is adjusted by the arrangement of the first folding leg portion 213 and the second folding leg portions 214. The distance of the transparent cover 311 is such that the photo sensor module 2 can obtain an optimal reflection and reception effect. The processing unit 5 is disposed on the surface of the circuit board 4 opposite to the light sensing module 2, and the first folding portion 213 and the second folding portion 214 of the light sensing module 2 are also It is electrically connected to the processing unit 5. By arranging the electronic components on the upper and lower surfaces of the circuit board 4 by surface mount technology (SMT), the number of layers of the circuit board 4 can be reduced, and further, because of the side plates of the side plate body 212 of the present invention The portion 216 is bent through the bridge portions 215, so that a gap is formed with the circuit board 4, and the gap formed by the Z-axis space between the circuit board 4 can be reused to set the electronic components, and the difference is reduced. The volume of the wearable device 6 is small.

It is to be noted that the relative position of the receiving unit 22 and the light-emitting unit 23 of the photosensor module 2 of the present invention has a predetermined relationship with the tilt angle to optimize the performance of the photo sensor module 2.

Specifically, a first straight line L perpendicular to the light-receiving surface 225 is defined, and a normal N of the light-emitting surface 235 of the light-emitting member 231 is extended such that the first straight line L and the normal line N intersect each other with an angle θ . That is, the angle θ thereof represents that the light-emitting unit 23 is inclined by θ degrees in the Z-axis direction toward the first straight line L perpendicular to the receiving unit 22, in other words, by extending through the side plate body portions 216 and with the normal line N The angle between the vertical straight line I ₁ and the straight line I ₂ of a horizontal plane is θ. In addition, the distance from a geometric center of each of the light-emitting units 22 to the side surface 224 of the light-receiving member 221 is Y, and the distance from the light-receiving surface 225 of the light-receiving member 221 to a predetermined light-reflecting surface is X. And Xtan θ < Y/2.

It should be particularly noted that when the photo sensor module 2 is disposed in the casing 31, the inner surface of the transparent outer cover 311 is the predetermined light reflecting surface. When the entire sensor module 2 is directly packaged by a package adhesive (not shown) without the transparent cover 311, the top surface of the package adhesive is the predetermined light reflection surface.

In the present invention, the light-emitting unit 22 and the receiving unit 23 have a 3D three-dimensional structure by the angle θ, so that the light-emitting members 231 of the light-emitting unit 22 have an angle of oblique light, so that the angle of the incident light can be adjusted, and the light is emitted. The light emitted by the member 231 is concentrated toward the first straight line L, and reduces the total reflection of the light on the transparent outer cover 311 to increase the amount of light incident on the user 100; further, the second light blocking layer 233 is coated And the structure of the lens 234 disposed on the illuminating members 231 to further enhance the illuminating intensity of the light emitted by the illuminating members 231 and directly inject the light into the skin of the user 100.

When the light emitted by the light-emitting members 231 is incident on the skin of the user 100, the skin tissue in the skin reflects the incident light to the light-receiving surface 225 of the receiving unit 23 to allow the light-receiving member 221 to receive The light receiving member 221 can cover the first light blocking layer 223 and expose only the first top surface 226 of the first transparent encapsulant 222 (see FIG. 1). Therefore, the light receiving member 221 can More efficient reception of light signals from skin tissue reflections and avoidance of interference from light emitted by the light-emitting elements 231 from the sides. In addition, the present invention further limits the relationship of Xtan θ < Y/2, except that the light-emitting unit 22 and the receiving unit 23 are not lowered by the distance, and the light-receiving member 221 is received by the light signal reflected from the skin tissue. It is also possible to thereby limit the problem that the light emitted by the illuminating members 231 is reflected by the predetermined light reflecting surface.

In summary, the photo sensor module 2 of the present invention is disposed in the wearing device 6, and the side plate body 212 is disposed at an angle to the plate body 211, so that the light emitting unit 23 faces in the Z-axis direction. The first straight line L of the receiving unit 22 is inclined by θ degrees to form a 3D stereoscopic oblique light emitting structure, so that the light reflected by the skin tissue of the user 100 can enter the light receiving member 221 more effectively, and the light sensing can be improved. The efficiency and accuracy of the measurement by the module 2, and the limitation of Xtan θ < Y/2, can avoid the problem that the light emitted from the illuminating members 231 is reflected by the predetermined light reflecting surface, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

100‧‧‧Users
23‧‧‧Lighting unit
2‧‧‧Light sensor module
231‧‧‧Lighting parts
20‧‧‧metal pieces
232‧‧‧Second transparent encapsulant
21‧‧‧Support frame
233‧‧‧second light barrier
210‧‧‧ Board Department
234‧‧‧ lens
211‧‧‧ board
235‧‧‧Glossy
212‧‧‧ side plate
236‧‧‧second top surface
213‧‧‧First leg
3‧‧‧Fixed matrix
214‧‧‧Second foot
31‧‧‧Shell
215‧‧ ‧Bridge
311‧‧‧Transparent cover
216‧‧‧ side panel body
32‧‧‧ Fixed Department
217‧‧‧Angle structure
4‧‧‧ boards
22‧‧‧ Receiving unit
5‧‧‧Processing unit
221‧‧‧Light receiving parts
6‧‧‧Wearing device
222‧‧‧First transparent encapsulant
L‧‧‧First straight line
223‧‧‧First light barrier
N‧‧‧ normal
224‧‧‧ side angle ‧‧‧ angle
225‧‧‧ Receiving surface
X‧‧‧ distance
226‧‧‧ first top surface
Y‧‧‧ distance

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: Figure 1 is a perspective view showing an embodiment of the optical sensor module of the present invention; FIG. 3A is a schematic diagram of a manufacturing process, illustrating a preparation of the photosensor module; FIG. 3B is a schematic diagram of a manufacturing process, illustrating the fabrication of the photo sensor; The module forms a light-receiving member and a light-emitting member; FIG. 3C is a schematic diagram of a manufacturing process for forming a first transparent encapsulant, a second transparent encapsulant, and a second lens for forming the photosensor module; 3D is a schematic diagram of a production process, which illustrates that the first light blocking layer and the second light blocking layer are formed by the photosensor module; FIG. 3E is a schematic diagram of a manufacturing process, illustrating the fabrication of the photo sensor module. FIG. 4 is a perspective view showing an embodiment of the wearing device of the present invention; and FIG. 5 is a cross-sectional view taken along line VV of FIG. 4, which assists in explaining FIG. This embodiment.

100‧‧‧Users

2‧‧‧Light sensor module

216‧‧‧ side panel body

224‧‧‧ side

225‧‧‧ Receiving surface

235‧‧‧Glossy

31‧‧‧Shell

311‧‧‧Transparent cover

4‧‧‧ boards

5‧‧‧Processing unit

6‧‧‧Wearing device

L‧‧‧First straight line

N‧‧‧ normal

Θ‧‧‧ angle

X‧‧‧ distance

Y‧‧‧ distance

I ₁ ‧‧‧ Straight line

I ₂ ‧‧‧ Straight line

Claims (10)

A light sensor module comprising: a support frame, comprising a plate body; and two side plates disposed on opposite sides of the plate body at an angle to the plate body; a receiving unit comprising a a light receiving member on the plate body, and a first light blocking layer covering the light receiving member and connecting the side plate body, the light receiving member having a light receiving surface on an opposite side of the plate body, the first blocking block The light layer has a pair of openings that are to be light-receiving surfaces; and two light-emitting units are respectively disposed on the two side plate bodies on opposite sides of the light-receiving member, and each of the light-emitting units includes at least one light-emitting surface The illuminating member defines a first straight line perpendicular to the light receiving surface of the light receiving member, and the light emitted by each of the illuminating units is concentrated toward the first straight line. The photo sensor module of claim 1, wherein each of the light emitting units further comprises a second transparent encapsulant and a second light blocking layer, the second transparent encapsulant coating the at least one light emitting The second light blocking layer covers the second transparent encapsulant on the peripheral surface of the illuminating member, and has a pair of openings corresponding to the illuminating surface of the illuminating member, and the second top surface of the second transparent encapsulant is The opening is exposed. The photo sensor module of claim 2, wherein each of the light emitting units further comprises a lens disposed on the second top surface of the second transparent encapsulant. The photo sensor module of claim 2, wherein the receiving unit further comprises a first transparent encapsulant covering the light receiving member, wherein the first light blocking layer is wrapped around the periphery of the light receiving member The first transparent encapsulant and the first top surface of the first transparent encapsulant are exposed to form the opening corresponding to the light receiving surface. The photo sensor module of claim 1, wherein the plate body has two opposite plate portions, the light receiving member is disposed on one of the plate body portions, and each of the side plate bodies has two side plate bodies. And a bridge portion extending from the two side plate portions toward the two plate body portions and connected to the first light blocking wall, wherein the bridge portions are respectively formed on opposite sides of the plate body portion Angle setting. The photo sensor module of claim 5, wherein the board further has two first leg portions respectively extending from opposite sides of the side plate body of the two plate body portions, Each of the side panels further has two second folding portions respectively protruding from the joints of the two bridge portions and the first light blocking wall and extending in the same direction as the opposite first folding portions, respectively. The two plate body portions and the side plate bodies are not spaced apart from each other. The photo sensor module of claim 6, wherein the first leg portions of the board body are electrically connected to the optical receiving member, and the second leg portions of the side plate body are provided The illuminating member is electrically connected to the outside. The photosensor module according to any one of claims 1 to 7, wherein the light receiving member further has two sides adjacent to the two side plates, and the first line and a normal line of the light emitting surface are mutually Intersecting and having an angle θ, a geometric center of each of the light-emitting units is at a distance Y from the side of the light-receiving member, and the light-receiving surface of the light-receiving member is away from the light-receiving member to the first straight line The distance of the predetermined light reflecting surface is X, and Xtan θ < Y/2. A wearing device is adapted to be worn on a user to be in contact with the skin of the user, and to measure a light volume change tracing signal, the wearing device comprising: a fixed base body, comprising a device capable of interacting with the user a cover of the transparent cover that is in contact with the skin, and a fixing portion that can be attached to the user to connect the cover; a circuit board fixed in the cover; and as in claim 1 The photo sensor module of any one of the seventh embodiments is disposed on the circuit board and located between the transparent outer cover and the circuit board. The wearing device of claim 9, wherein the light receiving member further has two sides adjacent to the two side plates, and a normal line of the first straight line and the light emitting surface intersect each other at an angle θ, each of the light emitting The distance from a geometric center of the unit to the side of the light receiving member is Y, the distance from the light receiving surface of the light receiving member to the transparent outer cover is X, and Xtan θ < Y/2.