Optical detection device

Abstract

An optical detection device includes a substrate, a light source, a light sensor, and a light guide structure. The substrate has an upper surface. The light source is disposed on the upper surface and configured to emit a detection light toward an object to be detected above. The light sensor is disposed on the upper surface. The light guide structure is disposed on the upper surface and at least partially above the light source. The light guide structure has a central axis perpendicular to the upper surface, and the light source and the light sensor are disposed on opposite sides of the central axis, respectively. The light guide structure is configured to deflect the detection light from one side of the light source to the other side of the light sensor along the central axis, so that the detection light is reflected by the object to be detected toward the light sensor. Thus, the optical detection device has a good light concentration effect, which improves the detection accuracy and further shortens the optical path of the detection light, thereby making the optical detection device small and thin.

Description

TECHNICAL FIELD

[0001] The present invention relates to a detection device, in particular, an optical detection device. BACKGROUND

[0002] With the advancement of technology, medical detection technology has advanced from invasive detection to non-invasive detection.

[0003] In the process of detection, some detection devices use optical principles to detect the human body, so the convenience of optical detection devices has become one of the considerations for users when purchasing products. If the optical detection device is too large, it is not convenient for users to carry or wear. In addition, manufacturers also want to give users a different experience from the past, break away from the structure of existing optical detection devices, and thus attract the purchasing desire of consumers.

[0004] Therefore, how to provide an optical detection device that can be miniaturized and provide an innovative concept, thereby improving the convenience of use and the competitiveness of products, has become one of the important issues. SUMMARY

[0005] Therefore, the purpose of the present invention is to provide an optical detection device that can solve the above problems. The optical detection device includes a substrate, a light source, a light sensor, and a light guide structure. The substrate has an upper surface. The light source is disposed on the upper surface and is used to emit detection light toward the upper side of the object to be detected. The light sensor is disposed on the upper surface. The light guide structure is disposed on the upper surface and at least partially above the light source, and the light guide structure has a central axis perpendicular to the upper surface, and the light source and the light sensor are respectively disposed on opposite sides of the central axis, wherein the light guide structure is used to deflect the detection light from one side of the light source to one side of the light sensor on the central axis, so that the detection light is reflected by the object to be detected toward the light sensor.

[0006] In one or more embodiments of the present invention, the light guide structure has a light guide protruding portion, and the light guide protruding portion has an incident light surface inclined to the central axis, and the incident light surface is used to receive the detection light.

[0007] In one or more embodiments of the present invention, the light guide structure has a light guide protruding portion and a lower groove portion, the lower groove portion accommodates the light source and the light guide protruding portion, the light guide protruding portion is located obliquely above the light source, and the light guide protruding portion has an incident light surface inclined to the central axis, and the incident light surface is used to receive the detection light.

[0008] In one or more embodiments of the present invention, the light guide structure is cup-shaped, the light guide structure covers and accommodates the light source, and the light sensor is disposed outside the light guide structure.

[0009] In one or more embodiments of the present invention, the cross section of the light guide structure has an M-shaped profile.

[0010] In one or more embodiments of the present application, the light sensor and the light source are multiple, and the multiple light sensors are disposed on opposite sides of the central axis corresponding to the multiple light sources.

[0011] In one or more embodiments of the present application, the light sensor and the light source are multiple, and the multiple light sources are disposed between the multiple light sensors.

[0012] In one or more embodiments of the present application, the light guide structure has a height less than or equal to 100 um.

[0013] In one or more embodiments of the present application, the light source includes a blue light source, a green light source, a red light source, or an infrared light source.

[0014] In one or more embodiments of the present application, the light source is a sub-millimeter light emitting diode light source or a micro light emitting diode light source.

[0015] In summary, the present application provides an optical detection device with a special light guide structure for deflecting detection light from one side of the central axis of the light guide structure to the other side. With this special light guide structure design, the light source and the light sensor are placed on both sides of the central axis, thereby not only improving the sensing accuracy of the optical detection device, but also helping to reduce the size of the optical detection device, making it easier for users to carry and use.

[0016] The above is only to illustrate the problems to be solved by the present application, the technical means for solving the problems, and the effects thereof, etc. The specific details of the present application will be described in detail in the embodiments and related drawings below. BRIEF DESCRIPTION OF DRAWINGS

[0017] To achieve the above-mentioned advantages and features, the principles described above will be explained in more detail with reference to the embodiments, and the specific embodiments are shown in the drawings. These drawings only illustratively describe the present application, and therefore do not limit the scope of the application. Through the drawings, the principles of the present application will be clearly explained, and additional features and details will be fully described, wherein:

[0018] Figure 1 a schematic diagram of an optical detection device according to one or more embodiments of the present application is shown;

[0019] Figures 2 to 6 a cross-sectional view of an optical detection device according to different embodiments of the present application is shown; Figure 1

[0020] a cross-sectional view of an optical detection device according to different embodiments of the present application is shown; Figures 7 to 10 Figure 1 ​Figure 2 is a top view of the optical detection device.

[0021] Legend

[0022] 100: optical detection device

[0023] 110: substrate

[0024] 111: upper surface

[0025] 120: light source

[0026] 120a: first light source

[0027] 120b: second light source

[0028] 130: light sensor

[0029] 130a: first light sensor

[0030] 130b: second light sensor

[0031] 140, 140a, 140b, 140c, 140d, 140e: light guide structure

[0032] 141a, 141b, 141c, 141d, 141e: light guide protrusion

[0033] 143a, 143b, 143c, 143d, 143e: side wall

[0034] 145a, 145b, 145c, 145d, 145e: lower groove

[0035] 200: object to be detected

[0036] b1, b2, b3, b4, b5: edge

[0037] t1, t2, t3, t4, t5: end

[0038] m, o: post

[0039] n: convex arc

[0040] p: taper

[0041] s1, s2, s3, s4, s5: light entry surface

[0042] x1, y2: flat surface

[0043] x2, y1: arc surface

[0044] A: cross-sectional line

[0045] B: blue light source

[0046] C: central axis

[0047] C1: first line segment

[0048] C2: second line segment

[0049] C3: third line segment

[0050] C4: fourth line segment

[0051] D: line segment

[0052] G: green light source

[0053] L: detection light

[0054] U: housing

[0055] R: red light source

[0056] W1, W2, W3, W4, W5, W6, W7: width

[0057] H1, H2, H3, H4, H5: height DETAILED DESCRIPTION

[0058] Embodiments of the present application will be described herein below with reference to the drawings, in which like reference numerals can indicate similar components throughout the several views. Many specific details of the present application can be practiced as set forth in the following description. However, it is understood that such details are by way of example and the present application can be practiced without such specific details. In other instances, well-known structures and functions have not been shown or described in order to not obscure the related functions being described. It is also noted that the present application can be practiced with less than all of the features presented and described herein.

[0059] Reference will now be made to Figure 1 , Figure 1 FIG. 1 illustrates a schematic diagram of an optical detection device 100 according to one or more embodiments of the present application. The optical detection device 100 includes a substrate 110, a light source 120, a light sensor 130, and a light guide structure 140. In particular, the light source 120 generates light, which is deflected by the light guide structure 140 and projected onto a target object 200 for the light sensor 130 to receive the light reflected by the target object 200. In addition, the optical detection device 100 further includes a housing U, which is configured to house and protect the light source 120, the light sensor 130, and the light guide structure 140. The housing U can include a transparent material, but the present application is not limited thereto.

[0060] In detail, the substrate 110 can be a transparent substrate or an opaque substrate, such as a rigid substrate, a flexible substrate, or a glass substrate, a sapphire substrate, a silicon substrate, a printed circuit board, a metal substrate, a ceramic substrate, but the present application is not limited thereto. In addition, the light source 120 can include a blue light source, a green light source, a red light source, or an infrared light source, and the light source 120 can include a light-emitting diode (LED) light source, such as an organic light-emitting diode (OLED) light source, a mini LED light source, or a micro LED light source, but the present application is not limited thereto. In some embodiments of the present application, the light sensor 130 is arranged according to the frequency of the light generated by the light source 120. When the light source 120 includes a red light source and / or an infrared light source, the light sensor 130 can include a red light sensor and / or an infrared light sensor to detect the blood oxygen concentration of the human body. In addition, when the light source 120 is a green light source, the light sensor 130 can include a corresponding green light sensor to detect the pulse of the human body. In detail, the light sensor 130 can include a PIN junction detector, a photomultiplier (PMT), a charge coupled device (CCD), or a complementary metal-oxide semiconductor (CMOS), but the present application is not limited thereto. In detail, the light guide structure 140 can include a transparent glass material or a polymer material, but is not limited thereto.

[0061] Please refer to Figure 2 , Figure 2 According to Figure 1Section line A depicts a cross-sectional view of the optical inspection device 100. In one or more embodiments of the present invention, the optical inspection device 100 includes a substrate 110, a light source 120, a light sensor 130, and a light guide structure 140a. The substrate 110 has an upper surface 111. The light source 120 is disposed on the upper surface 111 and is configured to emit inspection light L toward an object under test 200 (e.g., human skin) positioned above. The light sensor 130 is disposed on the upper surface 111. The light-guiding structure 140a is disposed on the upper surface 111 and partially above the light source 120. The center of the light-guiding structure 140a has a central axis C perpendicular to the upper surface 111. The light-guiding structure 140a is symmetrical (e.g., linearly symmetrical or centrally symmetrical) with respect to the central axis C. The light source 120 and the light sensor 130 are disposed on opposite sides of the central axis C. The light-guiding structure 140a is configured to deflect the detection light L from one side of the light source 120 on the central axis C to the other side of the light sensor 130, such that the detection light L is reflected by the object to be measured 200 and then projected toward the light sensor 130. However, the present invention is not limited to this.

[0062] In one or more embodiments of the present invention, the optical inspection device 100 includes a first light source 120a, a second light source 120b, a first light sensor 130a, and a second light sensor 130b. The first light source 120a and the first light sensor 130a are located on opposite sides of a central axis C, that is, the central axis C is located between the first light source 120a and the first light sensor 130a. The detection light L generated by the first light source 120a is deflected onto the surface of the object under test 200. The object under test 200 then reflects the detection light L and focuses it onto the first light sensor 130a. As a result, the first light sensor 130a has an excellent light collection effect, thereby improving the detection accuracy of the optical inspection device 100. Furthermore, deflecting the path of the detection light L contributes to the miniaturization and thinness of the optical inspection device 100.

[0063] Similarly, the second light source 120b and the second light sensor 130b are located on opposite sides of the central axis C. That is, the central axis C is located between the second light source 120b and the second light sensor 130b. The detection light L generated by the second light source 120b is deflected onto the surface of the object under test 200. The object under test 200 then reflects the detection light L and focuses it onto the second light sensor 130b. As a result, the second light sensor 130b has an excellent light collection effect.

[0064] In certain embodiments, a straight line path (e.g. Figure 1The cross-sectional line A) can be formed by the first light source 120a, the second light source 120b, the first light sensor 130a and the second light sensor 130b, whereby the arrangement of the first light source 120a, the second light source 120b, the first light sensor 130a and the second light sensor 130b occupies a small space, thus contributing to the miniaturization of the optical detection device 100, but the present application is not limited thereto.

[0065] In one or more embodiments of the present application, the light guide structure 140a has a light guide protrusion 141a, the light guide protrusion 141a has an inclined light-in surface s1 with respect to the central axis C, the light guide protrusion 141a is defined between an end t1 and an edge b1, and a straight line connecting the end t1 and the edge b1 is inclined with respect to the central axis C. The light-in surface s1 is used to receive the detection light L, so that the detection light L enters the light guide protrusion 141a from the light-in surface s1, and the light guide structure 140a further deflects the detection light L. Specifically, the light guide protrusion 141a is a cone shape (for example, a circular cone, a triangular cone, a quadrangular cone or other polygonal cone shape), the width W1 of the light guide protrusion 141a gradually decreases towards the substrate 110, and the light-in surface s1 can be flat or have a curvature, but the present application is not limited thereto.

[0066] In one or more embodiments of the present application, the light guide structure 140a has a light guide protrusion 141a, a side wall 143a and a lower groove 145a, wherein the side wall 143a surrounds the light guide protrusion 141a and the light source 120 to form the lower groove 145a. In other words, the light guide protrusion 141a and the side wall 143a jointly form and define the lower groove 145a. In addition, the lower groove 145a accommodates the light source 120 and the light guide protrusion 141a, and the light guide protrusion 141a is located obliquely above the light source 120, so that the light-in surface s1 of the light guide protrusion 141a receives the detection light L. The present application is not limited thereto. By Figure 2 It can be seen that the light guide protrusion 141a and the side wall 143a jointly form an M-shaped profile, so that the cross section of the light guide structure 140a has the characteristics of an M-shaped profile. In some embodiments of the present application, the light guide structure 140a is cup-shaped, the light source 120 is accommodated in the light guide structure 140a, and the light sensor 130 is arranged outside the light guide structure 140a. In addition, the light guide structure 140a has a height H1 less than or equal to 100 um, so as to reduce the volume of the optical detection device 100 and effectively adjust the path of the detection light L. Preferably, the height H1 of the light guide structure 140a is less than or equal to 75 um.

[0067] Please refer to Figure 3 , Figure 3 According to Figure 1 the cross-sectional line A illustrates a cross-sectional view of the optical detection device 100. Figure 3 WithFigure 2 Generally the same, the main difference is that Figure 3 The light guide structure 140b of the optical detection device 100 is different from the light guide structure 140a, and thus the details of other elements similar to those of the optical detection device 100 are not repeated here. In one or more embodiments of the present application, the light guide structure 140b has a light guide protrusion 141b having an inclined light entrance surface s2 relative to the central axis C, the light guide protrusion 141b is defined between an end t2 and an edge b2, and a straight line connecting the end t2 and the edge b2 is inclined relative to the central axis C. The light entrance surface s2 is used to receive the detection light L such that the detection light L enters the light guide protrusion 141b from the light entrance surface s2, and the light guide structure 140b further deflects the detection light L. Specifically, the light guide protrusion 141b is conical, the width W2 of the light guide protrusion 141b gradually decreases towards the substrate 110, and the light entrance surface s2 is an inwardly concave arc surface, but the present application is not limited thereto.

[0068] In one or more embodiments of the present application, the light guide structure 140b has the light guide protrusion 141b, a side wall 143b, and a lower groove 145b, wherein the side wall 143b surrounds the light guide protrusion 141b and the light source 120 to form the lower groove 145b. In other words, the light guide protrusion 141b and the side wall 143b jointly form and define the lower groove 145b. By Figure 3 It can be seen that the light guide protrusion 141b and the side wall 143b jointly form an M-shaped profile, and thus the cross section of the light guide structure 140b has the characteristics of the M-shaped profile. In some embodiments of the present application, the light guide structure 140b is cup-shaped, the light source 120 is accommodated in the light guide structure 140b, and the light sensor 130 is disposed outside the light guide structure 140b. In addition, the light guide structure 140b has a height H2 less than or equal to 100 um, so as to reduce the volume of the optical detection device 100 and effectively adjust the path of the detection light L. Preferably, the height H2 of the light guide structure 140b is less than or equal to 75 um.

[0069] Please refer to Figure 4 , Figure 4 According to Figure 1 the cross-sectional line A to draw a cross-sectional view of the optical detection device 100. Figure 4 and Figure 2 Generally the same, the main difference is that Figure 4The light guide structure 140c of the optical detection device 100 is different from the light guide structure 140a, and thus the details of other elements are not repeated here. In one or more embodiments of the present application, the light guide structure 140c has a light guide protrusion 141c with an inclined light-in surface s3 relative to the central axis C, the light guide protrusion 141c is defined between an end t3 and an edge b3, and a straight line connecting the end t3 and the edge b3 is inclined relative to the central axis C. The light-in surface s3 is configured to receive the detection light L such that the detection light L enters the light guide protrusion 141c from the light-in surface s3, and the light guide structure 140c further deflects the detection light L. Specifically, the light guide protrusion 141c is convexly arc-shaped, the width W3 of the light guide protrusion 141c gradually decreases towards the substrate 110, and the light-in surface s3 is outwardly convexly curved, but the present application is not limited thereto.

[0070] In one or more embodiments of the present application, the light guide structure 140c has the light guide protrusion 141c, a sidewall 143c, and a lower groove 145c, wherein the sidewall 143c surrounds the light guide protrusion 141c and the light source 120 to form the lower groove 145c. In other words, the light guide protrusion 141c and the sidewall 143c jointly form and define the lower groove 145c. The sidewall 143c has a width W4 that is greater than the width W3 of the light guide protrusion 141c. Figure 4 It is known that the light guide protrusion 141c and the sidewall 143c jointly form an M-shaped profile, and thus the cross-section of the light guide structure 140c has the feature of the M-shaped profile. In some embodiments of the present application, the light guide structure 140c is cup-shaped, the light source 120 is accommodated inside the light guide structure 140c, and the light sensor 130 is disposed outside the light guide structure 140c. In addition, the light guide structure 140c has a height H3 that is less than or equal to 100 um, so as to reduce the volume of the optical detection device 100 and efficiently adjust the path of the detection light L. Preferably, the height H3 of the light guide structure 140c is less than or equal to 75 um.

[0071] Please refer to Figure 5 , Figure 5 According to Figure 1 the cross-sectional line A to draw a cross-sectional view of the optical detection device 100. Figure 5 and Figure 2 are substantially the same, the main difference is Figure 5The light-guiding structure 140d of the optical inspection device 100 differs from the light-guiding structure 140a, and therefore, similar details of other components are not repeated here. In one or more embodiments of the present invention, the light-guiding structure 140d includes a light-guiding protrusion 141d, which has a light-entering surface s4 that is inclined relative to the central axis C. For example, the light-guiding protrusion 141d is defined between an end t4 and an edge b4, and the line connecting the end t4 and the edge b4 is inclined relative to the central axis C. The light-entering surface s4 is configured to receive the detection light L, so that the detection light L enters the light-guiding protrusion 141d from the light-entering surface s4, and the light-guiding structure 140d then deflects the detection light L. Specifically, the light-guiding protrusion 141d includes a column portion m and a convex arc portion n. The column portion m can be a triangular prism, a square prism, a pentagonal prism, a hexagonal prism, an octagonal prism or a cylinder, wherein the column portion m is connected to the convex arc portion n and is located above the convex arc portion n. The column portion m has a flat surface x1, and the convex arc portion n has an arc surface y1. The flat surface x1 and the arc surface y1 together form a light incident surface s4. In addition, the light incident surface s4 has a curvature inversion point, which is located at the connection between the flat surface x1 and the arc surface y1. In addition, the width W4 of the column portion m and the width W5 of the convex arc portion n gradually decrease toward the substrate 110, and the width W4 of the column portion m is greater than or equal to the width W5 of the convex arc portion n, but the present invention is not limited to this.

[0072] In one or more embodiments of the present invention, the light guide structure 140d has a light guide protrusion 141d, a sidewall 143d and a lower groove 145d, wherein the sidewall 143d surrounds the light guide protrusion 141d and the light source 120 to form the lower groove 145d. In other words, the light guide protrusion 141d and the sidewall 143d together form and define the lower groove 145d. Figure 5 As can be seen, the light-guiding protrusion 141d and the sidewall 143d together form an M-shaped profile, and the cross-section of the light-guiding structure 140d has the characteristics of an M-shaped profile. In some embodiments of the present invention, the light-guiding structure 140d is cup-shaped, with the light source 120 housed within the light-guiding structure 140d and the light sensor 130 disposed outside the light-guiding structure 140d. In addition, the light-guiding structure 140d has a height H4 of less than or equal to 100 μm to reduce the volume of the optical detection device 100 and efficiently adjust the path of the detection light L. More preferably, the height H4 of the light-guiding structure 140d is less than or equal to 75 μm.

[0073] Please refer to Figure 6 , Figure 6 according to Figure 1 The section line A in FIG. 1 shows a cross-sectional view of the optical inspection device 100 . Figure 6 and Figure 2 are roughly the same, with the main difference being Figure 6The light guide structure 140e of the optical detection device 100 is different from the light guide structure 140a, and thus the details of other elements are not repeated here. In one or more embodiments of the present application, the light guide structure 140e has a light guide protrusion 141e with an inclined light-in surface s5 with respect to the central axis C, for example, the light guide protrusion 141e is defined between an end t5 and an edge b5, and the straight line connecting the end t5 and the edge b5 is inclined with respect to the central axis C. The light-in surface s5 is used to receive the detection light L, so that the detection light L enters the light guide protrusion 141e from the light-in surface s5, and the light guide structure 140e further deflects the detection light L.

[0074] Specifically, the light guide protrusion 141e includes a column part o and a cone part p, the column part o can be a triangular column, a quadrangular column, a pentagonal column, a hexagonal column, an octagonal column or a circular column, and the cone part p can be a corresponding triangular cone, a quadrangular cone, a pentagonal cone, a hexagonal cone, an octagonal cone or a circular cone, wherein the column part o is connected to and above the cone part p, the column part o has an outward convex arc surface x2, the cone part p has a flat surface y2, and the arc surface x2 and the flat surface y2 together form the light-in surface s5. In addition, the light-in surface s5 has a curvature reversal point located at the junction of the arc surface x2 and the flat surface y2. In addition, the width W6 of the column part o and the width W7 of the cone part p gradually decrease towards the substrate 110, and the width W6 of the column part o is greater than or equal to the width W7 of the cone part p, but the present application is not limited thereto.

[0075] In one or more embodiments of the present application, the light guide structure 140e has the light guide protrusion 141e, a side wall 143e and a lower groove part 145e, wherein the side wall 143e surrounds the light guide protrusion 141e and the light source 120 to form the lower groove part 145e. In other words, the light guide protrusion 141e and the side wall 143e together form and define the lower groove part 145e. From Figure 6 It can be seen that the light guide protrusion 141e and the side wall 143e together form an M-shaped profile, and the cross section of the light guide structure 140e has the characteristics of the M-shaped profile. In some embodiments of the present application, the light guide structure 140e is cup-shaped, the light source 120 is accommodated in the light guide structure 140e, and the light sensor 130 is arranged outside the light guide structure 140e. In addition, the light guide structure 140e has a height H5 less than or equal to 100 um, so as to reduce the volume of the optical detection device 100 and effectively adjust the path of the detection light L. Preferably, the height H5 of the light guide structure 140d is less than or equal to 75 um.

[0076] Please refer to Figure 7 , Figure 7 According to Figure 1The line segment D depicts a top view of the optical detection device 100. In one or more embodiments of the present invention, the optical detection device 100 includes a plurality of light sources 120 (e.g., four light sources 120) and a plurality of light sensors 130 (e.g., four light sensors 130), wherein the plurality of light sources 120 surround a central axis C, and the plurality of light sensors 130 surround the central axis C and the light sources 120, so that the plurality of light sources 120 are disposed between the plurality of light sensors 130. In other words, the central axis C does not pass through any of the light sources 120. Specifically, the plurality of light sensors 130 correspond to the plurality of light sources 120 and are disposed on opposite sides of the central axis C, and the plurality of light sources 120 and the plurality of light sensors 130 are all arranged in a centrally symmetrical manner with respect to the central axis C. In other words, the positions of the four light sources 120 and the four light sensors 130 are centrally symmetrical with respect to the central axis C, which does not mean that the shapes of the light sources 120 and the light sensors 130 must be symmetrical. In other embodiments of the present invention, the first line segment C1 and the second line segment C2 are at any angle and are not perpendicular to each other, and the light source 120 and the light sensor 130 are not arranged in a centrally symmetrical manner, but the present invention is not limited thereto.

[0077] Figure 7 A first line segment C1 and a second line segment C2 are shown as being perpendicular to each other, wherein both the first line segment C1 and the second line segment C2 are perpendicular to the central axis C. In one or more embodiments of the present invention, four light sources 120 surround the central axis C, and four light sensors 130 surround the four light sources 120 and the central axis C. The first line segment C1 passes through two light sources 120 and two light sensors 130, while the second line segment C2 passes through the other two light sources 120 and the other two light sensors 130. This helps reduce the size of the optical inspection device 100 and prevents mutual interference among the four light sources 120, thereby improving the inspection accuracy of the optical inspection device 100.

[0078] Specifically, the first line segment C1 passes through the first light source 120a, the second light source 120b, the first light sensor 130a, and the second light sensor 130b. The first light source 120a and the second light sensor 120b are located between the first light sensor 130a and the second light sensor 130b. Furthermore, the first light source 120a and the second light sensor 120b are located within the light guide structure 140, while the first light sensor 130a and the second light sensor 130b are located outside the light guide structure 140. However, the present invention is not limited to this. In some embodiments, the second line segment C2 is similar to the first line segment C1, and therefore will not be repeated here.

[0079] Please also refer to Figure 7 and Figure 8 , Figure 7 and Figure 8 The optical detection device 100 shown is substantially the same, with the main difference beingFigure 8 Further, the light sources 120 include a blue light source B, a green light source G, and a red light source R. In some embodiments of the present application, the light sources 120 further include an infrared light source, but the present application is not limited thereto. In Figure 8 In some embodiments of the present application, the light sources 120 surround the central axis C, and the light sensors 130 surround the central axis C and the light sources 120, so the light sources 120 are arranged between the light sensors 130, but the present application is not limited thereto. Therefore, the light sources 120 can generate blue light, green light, red light, or infrared light of different wave bands according to different requirements. Since Figure 7 and Figure 8 are basically similar, and repeated descriptions are not provided herein.

[0080] Please refer to Figure 9 , Figure 9 and Figure 7 are basically similar, and repeated descriptions are not provided herein. Figure 9 The optical detection device 100 shown in FIG. 1 has six light sources 120 and six light sensors 130, wherein the six light sources 120 surround the central axis C, and the six light sensors 130 surround the central axis C and the six light sources 120. In other words, the central axis C does not pass through any light source 120. In addition, the six light sources 120 are located inside the light guide structure 140, and the six light sensors 130 are located outside the light guide structure 140, but the present application is not limited thereto.

[0081] In addition, Figure 9 Compared with Figure 7 A third line segment C3 is shown, wherein the third line segment C3 is perpendicular to the central axis C and simultaneously intersects and is included at an angle of about 45 degrees with the first line segment Cl and the second line segment C2, but the present application is not limited thereto. In some embodiments of the present application, each of the first line segment Cl, the second line segment C2, and the third line segment C3 passes through two light sources 120 and two light sensors 130. Specifically, the six light sources 120 and the six light sensors 130 are symmetrically arranged with the third line segment C3 as a reference. That is, the positions of the six light sources 120 and the six light sensors 130 are linearly symmetric with respect to the third line segment C3, rather than indicating that the shapes of the light sources 120 and the light sensors 130 must be symmetric. In this way, it is helpful to reduce the volume of the optical detection device 100 and inhibit mutual interference between the light sources 120, thereby improving the detection accuracy of the optical detection device 100. In other embodiments of the present application, the third line segment C3 is included at any angle with the first line segment Cl or the second line segment C2, and the light sources 120 and the light sensors 130 do not exhibit linearly symmetric arrangement, but the present application is not limited thereto.

[0082] Please refer to Figure 10 , Figure 10 and Figure 9Approximately, the main difference is that Figure 10 The optical detection device 100 shown has eight light sources 120 and eight light sensors 130, wherein the eight light sources 120 surround the central axis C, and the eight light sensors 130 surround the central axis C and the eight light sources 120. In other words, the central axis C does not pass through any light source 120. In addition, the eight light sources 120 are located inside the light guide structure 140, and the eight light sensors 130 are located outside the light guide structure 140, but the present application is not limited thereto.

[0083] In addition, Figure 10 Compared with Figure 9 A fourth line segment C4 is shown, wherein the fourth line segment C4 is perpendicular to the central axis C and perpendicular to the third line segment C3. In some embodiments of the present application, each of the first line segment C1, the second line segment C2, the third line segment C3 and the fourth line segment C4 passes through two light sources 120 and two light sensors 130. In addition, the eight light sources 120 and the eight light sensors 130 are arranged in central symmetry with the central axis C as the reference, thereby helping to reduce the volume of the optical detection device 100 and inhibiting mutual interference between the light sources 120, thereby improving the detection accuracy of the optical detection device 100. In other embodiments of the present application, the third line segment C3 is not perpendicular to the fourth line segment C4, and the light sources 120 and the light sensors 130 are not arranged in central symmetry, but the present application is not limited thereto.

[0084] In summary, the present application provides an optical detection device with a special light guide structure for deflecting detection light from one side of the central axis of the light guide structure to the other side. With this special light guide structure design, the light sources and light sensors are placed on both sides of the central axis, thereby not only improving the sensing accuracy of the optical detection device, but also helping to reduce the volume of the optical detection device, so as to facilitate the user to carry and use.

[0085] From the above detailed description of the specific embodiments of the present application, it can be clearly seen that although the present application has been disclosed as above, it is not intended to limit the present application, and any person skilled in the art can make various modifications and decorations without departing from the spirit and scope of the present application, therefore the protection scope of the present application shall be subject to the scope defined by the appended claims.

Claims

1. An optical detection device, characterized in that: include: a substrate having an upper surface; A light source is provided on the upper surface, and is used for emitting detection light toward the object to be detected above; a light sensor disposed on the upper surface; as well as A light-guiding structure is disposed on the upper surface and at least partially located above the light source. The light-guiding structure has a central axis perpendicular to the upper surface, and the central axis is located on opposite sides of the light source and the light sensor, respectively. The light-guiding structure is used to deflect the detection light from one side of the central axis of the light source to one side of the light sensor, so that the detection light is reflected by the object to be detected and then directed toward the light sensor. The light-guiding structure has a light-guiding protrusion, the width of which gradually decreases toward the upper surface of the substrate. The light-guiding protrusion has a light incident surface inclined to the central axis, and the light incident surface is used to receive the detection light.

2. The optical detection device according to claim 1, characterized in that The light guide structure has a lower groove portion, the lower groove portion accommodates the light source and the light guide protrusion portion, and the light guide protrusion portion is located obliquely above the light source.

3. The optical detection device according to claim 1, characterized in that The light guide structure is cup-shaped, covers and accommodates the light source, and the light sensor is arranged outside the light guide structure.

4. The optical detection device according to claim 1, characterized in that The cross section of the light guide structure has an M-shaped profile.

5. The optical detection device according to claim 1, characterized in that There are a plurality of light sensors and a plurality of light sources, and the light sensors are respectively arranged on opposite sides of the central axis corresponding to the light sources.

6. The optical detection device according to claim 1, characterized in that There are a plurality of the light sensors and the light sources, and the light sources are arranged between the light sensors.

7. The optical detection device according to claim 1, characterized in that The light guide structure has a height less than or equal to 100 um.

8. The optical detection device according to claim 1, characterized in that The light source includes a blue light source, a green light source, a red light source or an infrared light source.

9. The optical detection device according to claim 1, characterized in that: The light source is a sub-millimeter light emitting diode light source or a micro light emitting diode light source.

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