TWM572985U - Testing device - Google Patents

Abstract

A bio-sensing apparatus adapted to sense biopolymers is provided. The bio-sensing apparatus includes a sensing device, a translucent device and a surface plasmon resonance layer. The translucent device is disposed on the sensing device. The surface plasmon resonance layer is disposed on the translucent device and is adapted to receive the biopolymers. The translucent device is disposed between the surface plasmon resonance layer and the sensing device.

Description

Detection device

The present invention relates to a detection device, and more particularly, to a detection device for sensing a biopolymer.

In the past, the identification technology used, for example, a biometric (for example, a finger) to press the ink and transfer it to a paper to form a fingerprint pattern, and then an optical scan was used to enter a computer for file creation or comparison. The above-mentioned identity recognition has the disadvantage that it cannot be processed immediately, nor can it meet the needs for instant identity authentication in today's society. Therefore, electronic biometric identification devices have become one of the mainstreams of current scientific and technological development. However, in general, the biometric identification device only has a function of biometric identification. Therefore, how to increase other functions of the biometric identification device to enhance the added value of the biometric identification device is also one of the current development directions.

The present invention provides a detection device capable of sensing a biopolymer.

The detection device according to an embodiment of the present invention includes a light guide element, a first reflection element, a sensing element, a light emitting element, and a surface plasma resonance layer. The light guide element includes a top surface and a bottom surface opposite to the top surface. The first reflective element is disposed on a bottom surface of the light guide element. The sensing element is disposed beside the bottom surface of the light guide element. The light emitting element is used for emitting a light beam, wherein the light beam is reflected by the first reflecting element and transmitted to the sensing element. The surface plasma resonance layer is disposed on the light guide element and is used to receive the biopolymer. The light guide element is located between the surface plasma resonance layer and the sensing element.

Based on the above, the detection device according to an embodiment of the present invention has the functions of both biometric identification and biopolymer detection, and has high added value.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, embodiments are described below in detail with reference to the accompanying drawings.

The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of each embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: "up", "down", "front", "rear", "left", "right", etc., are only directions referring to the attached drawings. Therefore, the directional terms used are used for illustration, not for limiting the present invention. Also, in any of the following embodiments, the same or similar elements will be given the same or similar reference numerals.

FIG. 1 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a part of a detection device according to an embodiment of the present invention. Referring to FIGS. 1 and 2, the detection device 200 is located in the environmental medium 1. In this embodiment, the environmental medium 1 is, for example, air. However, the present invention is not limited to this. In other embodiments, the detection device 200 may be located in other types of environmental media. The detection device 200 is used for capturing an image of an object. Under normal circumstances, the object is a biological feature, such as a fingerprint, but the present invention is not limited to this.

The detection device 200 includes a light guide element 210. The light guide element 210 has a top surface 212, a bottom surface 214 opposite to the top surface 212, a light incident surface 216 and a light exit surface 218 connected between the top surface 212 and the bottom surface 214. The light emitting surface 218 is opposite to the top surface 212. The bottom surface 214 is connected between the light incident surface 216 and the light exit surface 218. In particular, the light incident surface 216 is inclined with respect to the top surface 212, and the light incident surface 216 and the top surface 212 have an acute angle α therebetween.

In this embodiment, the light guide element 210 further has an inner wall 213. The light emitting surface 218 is closer to the light transmitting element 220 than the bottom surface 214. The inner wall 213 is connected between the bottom surface 214 and the light emitting surface 218. The inner wall 213 and the light emitting surface 218 form a depression 210a. In other words, the light guide element 210 includes a thick portion 210-1 having a bottom surface 214 and a thin portion 210-2 having a light emitting surface 218. In this embodiment, the light emitting surface 218 and the bottom surface 214 may be selectively parallel to the top surface 212, but the present invention is not limited thereto. In other embodiments, the light emitting surface 218 may be inclined with respect to the top surface 212, as follows It will be illustrated in the following paragraphs with other illustrations.

The detection device 200 includes a light transmitting element 220. The light transmitting element 220 is disposed on the top surface 212 of the light guiding element 210. In this embodiment, the light-transmitting element 220 can be fixed on the top surface 212 of the light-guiding element 210 through an optical adhesive (not shown). The material of the light guide element 210 and / or the material of the light transmitting element 220 may be selected from glass, polymethylmethacrylate (PMMA, Polycarbonate), or other appropriate light transmitting materials. In this embodiment, the light guide element 210, the optical adhesive, and the light transmitting element 220 may have the same or similar refractive indices, but the present invention is not limited thereto.

The detection device 200 includes a light emitting element 230. The light emitting element 230 is disposed beside the light incident surface 216 and is used to emit a light beam L. In this embodiment, the light incident surface 216 of the light guide element 210 has a recess 216a. The light emitting element 230 is disposed in the recess 216a. The detection device 200 further includes an optical glue 250. The optical glue 250 is filled in the recess 216 a to cover the light emitting element 230 and connect the light emitting element 230 and the light guiding element 210. In this embodiment, the optical glue 250 may have the same or similar refractive index as the light guide element 210 to reduce the loss before the light beam L enters the light guide element 210, but the present invention is not limited thereto. In this embodiment, the light beam L is, for example, invisible light. Therefore, when the electronic product equipped with the detection device 200 captures an image of an object, the light beam L does not affect the appearance of the electronic product. However, the present invention is not limited to this. In other embodiments, the light beam L may be visible light or a combination of visible light and invisible light. In this embodiment, the light-emitting element 230 may be a light-emitting diode, but the present invention is not limited thereto. In other embodiments, the light-emitting element 230 may also be another appropriate type of light-emitting element.

The detection device 200 includes a sensing element 240. The sensing element 240 is disposed on the light emitting surface 218 of the light guide element 210. The light-receiving surface 240 a of the sensing element 240 faces the light-emitting surface 218 of the light-emitting element 210. In this embodiment, the sensing element 240 bears on the light emitting surface 218 of the light guiding element 210, and the light receiving surface 240 a of the sensing element 240 may be substantially parallel to the light emitting surface 218 of the light guiding element 210. The sensing element 240 is, for example, a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS). However, the present invention is not limited thereto. In other embodiments, the sensing element 240 240 may also be other suitable types of image sensors.

1 and FIG. 2, the light beam L passes through the light incident surface 216 and is transmitted to the light transmitting element 220. At least a part of the light beam L is totally reflected at the interface 222 between the light transmitting element 220 and the environmental medium 1. When an object (for example: a fingerprint convex portion) touches the interface 222, the total reflection of the light beam L will be destroyed on a portion of the interface 222 corresponding to the fingerprint convex portion, so that the sensing element 240 obtains the corresponding fingerprint convex portion. Dark lines; while the convex part of the fingerprint touches part of the interface 222, the concave part of the fingerprint will not touch the interface 222. On the other part of the interface 222 corresponding to the concave part of the fingerprint, the total reflection of the light beam L will not be damaged. Furthermore, the sensing element 240 is configured to obtain a bright pattern corresponding to the concave portion of the fingerprint; thereby, the sensing element 240 can obtain a bright and dark object image (for example, a fingerprint image).

It is worth noting that through the inclined light incident surface 216 (ie, the design of the acute angle α), the light beam L emitted from the light emitting element 230 can be totally reflected at the interface 222 between the light transmitting element 220 and the environmental medium 1 within a short distance k. Accordingly, the size of the detection device 200 can be reduced to facilitate installation in various electronic products. In this embodiment, the size of the acute angle α can be appropriately designed to further increase the proportion of total reflection of the light beam L at the interface 222 while reducing the size of the detection device 200. For example, in this embodiment, the acute angle α may satisfy the following formula (1): --- (1), where θ _i is the angle at which the light beam L enters the light guide element 210 from the light incident surface 216, n ₁ is the refractive index of the environmental medium 1, and n ₂ is the refractive index of the light guide element 210. If the direction from the normal of the light incident surface 216 (for example: in FIG. 2, there is no dashed line parallel to the light beam L) to the light beam L is clockwise, then θ _i is negative. If the direction from the normal line of the light incident surface 216 (for example: in FIG. 2, there is no dotted line parallel to the light beam L) to the light beam L is counterclockwise, then θ _i is a positive value. When the angle α satisfies the above formula (1), the proportion of total reflection of the light beam L at the interface 222 is increased, which is helpful to improve the image pickup quality of the detection device 200.

Referring to FIG. 1, in this embodiment, the detection device 200 may further include a second reflective element 270 and a first reflective element 260. The second reflecting element 270 is disposed on the top surface 212 of the light guiding element 210 and is located between the light transmitting element 220 and the light guiding element 120. The first reflective element 260 is disposed on a bottom surface 214 of the light guide element 210. The light beam L passes through the light incident surface 216 and is sequentially reflected by the second reflection element 270 and the first reflection element 260 to expand the light beam L. The enlarged light beam L is transmitted to the light transmitting element 220 and is totally reflected at the interface 222 between the light transmitting element 220 and the environmental medium 1. The sensing element 240 is disposed closer to the light-transmitting element 220 than the first reflecting element 260 (for example, at the recess 210 a).

It is worth noting that the beam expansion effect of the second reflecting element 270 and the first reflecting element 260 and the position of the sensing element 240 are adjusted (for example, the light receiving surface 240a of the sensing element 240 is close to the light transmitting element 220, or the sensing element 240 is adjusted). The light receiving surface 240a of the measuring element 240 is inclined relative to the top surface 212), and the sensing element 240 can use the light receiving surface 240a with a small area to capture a complete object image (for example, a fingerprint image). In other words, the area of the sensing element 240 can be reduced, and the size of the detection device 200 including the sensing element 240 can be further reduced. However, the present invention is not limited to this. In other implementations, the detection device may not include the second reflective element 270 and the first reflective element 260, which will be described in the following paragraphs with other examples.

It is worth noting that the detection device 200 of this embodiment further includes a surface plasma resonance (SPR) layer SPR. The surface plasma resonance layer SPR is disposed on the surface 222 of the light transmitting element 220. The light transmitting element 220 is disposed between the surface plasma resonance layer SPR and the sensing element 240. In this embodiment, the material of the surface plasma resonance layer SPR includes, for example, a metal, and the thickness of the surface plasma resonance layer SPR is, for example, about 50 nanometers (nm), but the present invention is not limited thereto.

The surface plasmon resonance layer SPR is used to receive biopolymers 80, such as sweat, blood, urine, bacteria, viruses, etc., but the present invention is not limited to this. The at least one light emitting element 230 is configured to emit a sensing light beam L to the surface plasma resonance layer SPR. The sensing beam L reflected by the surface plasmon resonance layer SPR has various reflection angles θ; when the biopolymer 80 is formed on the surface plasmon resonance layer SPR, it has a specific angle (ie, resonance angle) of various reflection angles θ The reflectivity of the sensing beam L will drop sharply; the sensing element 240 receives the sensing beam L with various reflection angles θ reflected by the surface plasma resonance layer SPR; analyzing the light of the sensing beam L received by the sensing element 240 The distribution can infer what the specific angle (ie the resonance angle) is. Based on the specific angle, whether the biopolymer 80 disposed on the surface plasma resonance layer SPR can be identified is a specific biopolymer 80. This is illustrated below with reference to FIG. 52.

FIG. 52 shows the relationship between various reflection angles θ of the sensing light beam L reflected by the surface plasma resonance layer SPR and its reflectance. Please refer to FIG. 1 and FIG. 52. For example, when the first biopolymer 80 is formed on the surface plasma resonance layer SPR, the sensing beam L having various reflection angles θ reflected by the surface plasma resonance layer SPR is reflected. The reflectivity at a specific angle θ1 will drop sharply. Analyzing the sensing beam L with various reflection angles θ received by the surface plasma resonance layer SPR received by the sensing element 240 can infer what the specific angle θ1 is. θ1, it can be identified that the biopolymer 80 disposed on the surface plasma resonance layer SPR is the first biopolymer 80; when the second biopolymer 80 is formed on the surface plasma resonance layer SPR, The reflectivity of the sensing beam L with various reflection angles θ2 reflected by the surface plasmon resonance layer SPR at a specific angle θ2 will decrease sharply. The reflections received by the sensing element 240 and reflected by the surface plasmon resonance layer SPR have various reflection angles. The sensing beam L of θ can infer what the specific angle θ2 is. With the specific angle θ2, the biopolymer 80 disposed on the surface plasma resonance layer SPR can be identified as the second biopolymer 80; the third Biopolymer 80 formed on the surface plasma resonance When SPR is on, the reflectance of the sensing beam L with various reflection angles θ3 reflected by the surface plasmon resonance layer SPR at a specific angle θ3 will drop sharply. Analysis received by the sensing element 240 is reflected by the surface plasmon resonance layer SPR The sensing beam L with various reflection angles θ can infer what the specific angle θ3 is. With the specific angle θ3, it is possible to identify the biopolymer 80 disposed on the surface plasma resonance layer SPR as the third biopolymer物 80。 80.

FIG. 3 is a schematic cross-sectional view of a detection device according to another embodiment of the present invention. Referring to FIG. 3, the detection device 200A is similar to the aforementioned detection device 200, and therefore the same or corresponding components are denoted by the same or corresponding reference numerals. The difference between the detection device 200A and the detection device 200 is that the light emitting surface 218A of the detection device 200A is different from the light emitting surface 218 of the detection device 200. The following mainly describes this difference. Please refer to the previous description for the same or corresponding parts.

Referring to FIG. 3, the detection device 200A includes a light guiding element 210, a light transmitting element 220, a light emitting element 230, and a sensing element 240. The light guide element 210 has a top surface 212, a bottom surface 214 opposite to the top surface 212, a light incident surface 216 connected between the top surface 212 and the bottom surface 214, and a light exit surface 218A. The light emitting surface 218A is opposite to the top surface 212. The bottom surface 214 is connected between the light incident surface 216 and the light exit surface 218A. An acute angle α is included between the light incident surface 216 and the top surface 212. The light transmitting element 220 is disposed on the top surface 212 of the light guiding element 210. The light emitting element 230 is disposed beside the light incident surface 216 and is used to emit a light beam L. The light beam L passes through the light incident surface 216 and is transmitted to the light transmitting element 220, and is totally reflected at the interface 222 between the light transmitting element 220 and the environmental medium 1. The sensing element 240 is disposed on the light emitting surface 218A of the light guide element 210.

Different from the detection device 200, the light-emitting surface 218A of the detection device 200A is inclined with respect to the top surface 212 and the bottom surface 214, and the distance k between the top surface 212 and the light-emitting surface 218A gradually decreases as it moves away from the light emitting element 230. The sensing element 240 bears on the light emitting surface 218A, and the light receiving surface 240 a of the sensing element 240 may be substantially parallel to the light emitting surface 218A of the light guiding element 210. The light receiving surface 240 a of the sensing element 240 is also inclined with respect to the top surface 212 and the bottom surface 214. In addition to the functions and advantages of the detection device 200 described above, the detection device 200A uses a tilted sensing element 240. The detection device 200A can reduce the probability of stray light entering the sensing element 240, thereby improving the image quality of the captured object. Improve the contrast of object images.

FIG. 4 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 5 is a schematic diagram of a part of a detection device according to an embodiment of the present invention. Please refer to FIG. 4 and FIG. 5, the detection device 200B is similar to the detection device 200A, and therefore the same or corresponding components are denoted by the same or corresponding reference numerals. The difference between the detection device 200B and the detection device 200A is that the light emitting element 230B is disposed outside the light guide element 210 and is located in the environmental medium 1. The following mainly describes this difference. Please refer to the previous description for the same or corresponding parts.

Referring to FIGS. 4 and 5, the detection device 200B includes a light guiding element 210, a light transmitting element 220, a light emitting element 230B, and a sensing element 240. The light guide element 210 has a top surface 212, a bottom surface 214 opposite to the top surface 212, a light incident surface 216B and a light exit surface 218A connected between the top surface 212 and the bottom surface 214. The light emitting surface 218A is opposite to the top surface 212. The bottom surface 214 is connected between the light incident surface 216B and the light exit surface 218A. An acute angle α is included between the light incident surface 216B and the top surface 212. The light transmitting element 220 is disposed on the top surface 212 of the light guiding element 210. The light emitting element 230B is disposed beside the light incident surface 216 and is used to emit a light beam L. The light beam L passes through the light incident surface 216B and is transmitted to the light transmitting element 220 and is totally reflected at the interface 222 between the light transmitting element 220 and the environmental medium 1. The sensing element 240 is disposed on the light emitting surface 218A of the light guide element 210.

Different from the detection device 200A, the light incident surface 216B of the detection device 200B may not have a depression 216a, and the light emitting element 230B is disposed outside the light guide element 210 and is located in the environmental medium 1. In other words, the light beam L emitted from the light-emitting element 230B needs to pass through the environmental medium 1 for a certain distance before passing through the light-entering surface 216B and entering the light-guiding element 210. Due to the change in the transmission path of the light beam L described above, the optimal range of the acute angle α of the detection device 200B is also different from the optimal range of the acute angle α of the detection device 200A. In detail, in the detection device 200B, the acute angle α can satisfy the following formula (2): --- (2), where θ _i is the incident angle of the light beam L to the light incident surface 216B, n ₁ is the refractive index of the environmental medium 1, and n ₂ is the refractive index of the light guide element 210. If the direction from the normal line of the light incident surface 216B (for example, the dotted line in FIG. 5) to the light beam L is clockwise, θ _i is negative. If the direction from the normal line of the light incident surface 216B (for example, the dotted line in FIG. 5) to the light beam L is counterclockwise, θ _i is a positive value. The detection device 200B has similar functions and advantages as the detection device 200A, and will not be repeated here.

FIG. 6 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. Referring to FIG. 6, the detection device 200C is similar to the aforementioned detection device 200A, and therefore the same or corresponding components are represented by the same or corresponding reference numerals. The difference between the detection device 200C and the detection device 200A is that the detection device 200C may not include the second reflection element 270 and the first reflection element 260, and the light guide element 210 of the detection device 200C may not have the inner wall 213. The following mainly describes this difference. Please refer to the previous description for the same or corresponding parts.

Referring to FIG. 6, the detection device 200C includes a light guiding element 210, a light transmitting element 220, a light emitting element 230, and a sensing element 240. The light guide element 210 has a top surface 212, a bottom surface 214 opposite to the top surface 212, a light incident surface 216 connected between the top surface 212 and the bottom surface 214, and a light exit surface 218C. The light emitting surface 218C is opposite to the top surface 212. The bottom surface 214 is connected between the light incident surface 216 and the light exit surface 218C. The light emitting surface 218C is inclined with respect to the top surface 212, and the distance k between the top surface 212 and the light emitting surface 218C gradually decreases as it moves away from the light emitting element 230. An acute angle α is included between the light incident surface 216 and the top surface 212. The light transmitting element 220 is disposed on the top surface 212 of the light guiding element 210. The light emitting element 230 is disposed beside the light incident surface 216 and is used to emit a light beam L. The light beam L passes through the light incident surface 216 and is transmitted to the light transmitting element 220, and is totally reflected at the interface 222 between the light transmitting element 220 and the environmental medium 1. The sensing element 240 is disposed on the light emitting surface 218C of the light guide element 210. The sensing element 240 bears on the light emitting surface 218C, and the light receiving surface 240 a of the sensing element 240 is parallel to the light emitting surface 218C of the light guiding element 210. In other words, the light receiving surface 240a of the sensing element 240 is also inclined.

Different from the detection device 200A, the light guide element 210 of the detection device 200C may not have the inner wall 213, and the light emitting surface 218C of the light guide element 210 may be directly connected to the bottom surface 214. In addition, the detection device 200C may not include the second reflective element 270 and the first reflective element 260, and the light beam L can be directly transmitted to the light transmitting element 220 after passing through the light emitting surface 116, and the interface 222 of the light transmitting element 220 and the environmental medium 1 is completely reflection. In other words, the use of the primary reflection (ie, the total reflection of the light beam L on the interface 222) and the tilted sensing element 240 can also reduce the size of the detection device 200C without necessarily providing the second reflecting element 270 and the first reflecting element. 260.

FIG. 7 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 8 is a schematic diagram of a part of a detection device according to an embodiment of the present invention. Referring to FIG. 7 and FIG. 8, the detection device 200D is similar to the foregoing detection device 200, and therefore the same or corresponding components are represented by the same or corresponding reference numerals. The difference between the detection device 200D and the detection device 200 is that the light incident surface 216 of the detection device 200D may be disposed on the bottom of the light guide element 210. The following mainly describes this difference. Please refer to the previous description for the same or corresponding parts.

Referring to FIGS. 7 and 8, the detection device 200D includes a light guiding element 210, a light transmitting element 220, a light emitting element 230, a sensing element 240, a second reflecting element 270 and a first reflecting element 260. The light guide element 210 has a top surface 212, a bottom surface 214 opposite to the top surface 212, a light incident surface 216 and a light exit surface 218 connected between the top surface 212 and the bottom surface 214. The light emitting surface 218 is opposite to the top surface 212. The bottom surface 214 is connected between the light incident surface 216 and the light exit surface 218. The light transmitting element 220 is disposed on the top surface 212 of the light guiding element 210. The light emitting element 230 is used for emitting a light beam L. The sensing element 240 is disposed on the light emitting surface 218 of the light guide element 210. The second reflective element 270 is disposed on the top surface 212 of the light guide element 210 and is located between the light transmitting element 220 and the light guide element 210. The first reflective element 260 is disposed on a bottom surface 214 of the light guide element 210. The light beam L passes through the light incident surface 216 and is reflected by the second reflection element 270 and the first reflection element 260. The light beam L is totally reflected by the second reflecting element 270 and the first reflecting element 260 at the interface 222 of the light transmitting element 220 and the environmental medium 1.

Different from the detection device 200A, the light incident surface 216 of the detection device 200D may be disposed on the bottom of the light guide element 210. In other words, part of the light incident surface 216 may be substantially coplanar with the bottom surface 214, but the present invention is not limited thereto. In this embodiment, θ _i is the angle at which the light beam L enters the light guide element 210 from the light incident surface 216, and θ _i satisfies the following formula (3): --- (3), where n ₁ is the refractive index of the environmental medium 1 and n ₂ is the refractive index of the light guide element 210. If the direction from the normal line of the light incident surface 216 (for example, the dashed line in FIG. 8) to the light beam L is clockwise, then θ _i is negative. If the direction from the normal line of the light incident surface 216 (for example, the dotted line in FIG. 8) to the light beam L is counterclockwise, then θ _i is a positive value. The detection device 200D has similar functions and advantages as the detection device 200, and will not be repeated here.

FIG. 9 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. Referring to FIG. 9, the detection device 200E includes a light guide element 210. The light guide element 210 has a top surface 212 and a bottom surface 214 opposite to each other. The light guide element 210 further has a side wall 219 connected between the top surface 212 and the bottom surface 214. In this embodiment, the side wall 219 may not be inclined with respect to the top surface 212. In other words, the side wall 219 and the top surface 212 may be substantially perpendicular. However, the present invention is not limited to this. In other embodiments, the side wall 219 may be inclined with respect to the top surface 212. In this embodiment, the refractive index of the light guide element 210 may be greater than or equal to 1.4 and less than or equal to 1.6. The material of the light guide element 210 is, for example, glass. However, the present invention is not limited to this. In other embodiments, the material of the light guide element 210 may be other suitable materials, such as: polymethylmethacrylate (PMMA), polycarbonate (PC), or other materials. Appropriate transparent material.

The detection device 200E includes a light transmitting element 220. The light transmitting element 220 is disposed on the top surface 212 of the light guiding element 210. The light transmitting element 220 has a surface 222 that faces away from the light guiding element 210. In this embodiment, if the detection device 200E is used to capture a fingerprint and / or a vein of a finger, the surface 222 of the light transmitting element 220 can be pressed by a finger.

The detection device 200E includes a first optical glue 201. The first optical glue 201 is disposed between the light transmitting element 220 and the top surface 212 of the light guiding element 210. The light-transmitting element 220 is connected to the top surface 212 of the light-guiding element 210 by using the first optical glue 201. In this embodiment, the first optical glue 201 may have the same or similar refractive index as the light guide element 210 and / or the light transmitting element 220 to reduce the beam L at the boundary between the first optical glue 201 and the light guide element 210 and / Or loss on the boundary between the first optical glue 201 and the light-transmitting element 220. In other words, the refractive index of the first optical adhesive 201 may also be greater than or equal to 1.4 and less than or equal to 1.6, but the present invention is not limited thereto.

The detection device 200E includes a sensing element 240. The sensing element 240 is disposed on the bottom surface 214 of the light guide element 210. The light guide element 210 is located between the light transmitting element 220 and the sensing element 240. The sensing element 240 has a light-receiving surface 240 a facing the light guiding element 210.

The detection device 200E includes a second optical glue 202. The second optical glue 202 is disposed between the bottom surface 214 of the light guiding element 210 and the sensing element 240. The sensing element 240 is connected to the bottom surface 214 of the light guide element 210 by using the second optical glue 202. In this embodiment, the second optical glue 202 may have the same or similar refractive index as the light guide element 210 to reduce the loss of the light beam L at the boundary between the second optical glue 202 and the light guide element 210. In other words, the refractive index of the second optical glue 202 may also be greater than or equal to 1.4 and less than or equal to 1.6, but the present invention is not limited thereto.

The material of the light guide element 210 is different from that of the first optical glue 201 and the second optical glue 202. In other words, a light guide element 210 with a lower material cost can be inserted between the light transmitting element 220 and the sensing element 240 to reduce the amount of optical glue filled between the light transmitting element 220 and the sensing element 240. Since the amount of the first optical glue 201 and the second optical glue 202 which are high in material costs is small, the manufacturing cost of the detection device 200E is low.

The detection device 200E includes a light emitting element 230. The light emitting element 230 is used for emitting a light beam L. The light beam L is transmitted to the light-transmitting element 220 through the light-guiding element 210 and is totally reflected at the interface (ie, the surface 222) of the light-transmitting element 220 and the environmental medium 1. When an object (such as a fingerprint convex portion) touches the surface 222, on a portion of the surface 222 corresponding to the convex portion of the fingerprint, the total reflection of the light beam L will be destroyed, so that the sensing element 240 obtains a dark pattern on the convex portion of the fingerprint. ; When the convex part of the fingerprint touches part of the surface 222, the concave part of the fingerprint will not touch the surface 222. On the other part of the surface 222 corresponding to the concave part of the fingerprint, the total reflection of the light beam L will not be destroyed, thereby making the sensing element 240 obtains the light pattern corresponding to the concave portion of the fingerprint; thereby, the sensing element 240 can obtain a bright and dark object image (for example, a fingerprint image). In this embodiment, the light beam L is, for example, visible light. However, the present invention is not limited to this. In other embodiments, the light beam L may be invisible light or a combination of invisible light and visible light. The light-emitting element 230 is, for example, a light-emitting diode, but the present invention is not limited thereto. In other embodiments, the light-emitting element 230 may be another appropriate type of light-emitting element.

In this embodiment, the detection device 200E may further include a second reflective element 270 and a first reflective element 260. The second reflective element 270 is disposed on the top surface 212 of the light guide element 210. The second reflecting element 270 is located between the light transmitting element 220 and the light guiding element 210. The first reflective element 260 is disposed on the bottom surface 214 of the light guide element 210. The light guide element 210 is located between the second reflective element 270 and the first reflective element 260. The light beam L is reflected by the second reflective element 270 and the first reflective element 260 and transmitted to the light transmitting element 220, and a total reflection occurs at the interface (ie, the surface 222) of the light transmitting element 220 and the environmental medium 1. For example, in this embodiment, the second reflective element 270 and the first reflective element 260 may be a reflective sheet or a reflective layer formed by a coating method, which is not limited in the present invention.

In this embodiment, the light beam L can be transmitted to the top surface 212 of the light guide element 210 before being transmitted to the second reflection element 270 and the first reflection element 260, and the light beam L can be sequentially transmitted by the second reflection element 270 and the first The reflecting element 260 reflects to transmit to the light transmitting element 220. However, the present invention is not limited to this. In other embodiments, the light beam L may be transmitted along other paths. In addition, in this embodiment, the second reflective element 270 and the first reflective element 260 may be staggered and partially overlap. However, the present invention is not limited to this. In other embodiments, the second reflective element 270 and the first reflective element 260 may be completely staggered without overlapping, or may be arranged at other appropriate relative positions. The following is shown in conjunction with FIG. 10 and FIG. 11 illustrates it.

FIG. 10 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200F of FIG. 10 is similar to the detection device 200E of FIG. 9, and therefore the same or corresponding components are represented by the same or corresponding reference numerals. Different from the detection device 200E, in the embodiment of FIG. 10, the light beam L can be transmitted to the bottom surface 214 of the light emitting element 210 before being transmitted to the second reflection element 270 and the first reflection element 260, and the light beam L can be sequentially Reflected by the first reflective element 260 and the second reflective element 270 to be transmitted to the light transmitting element 220. For example, in this embodiment, the second reflective element 270 and the first reflective element 260 may be a reflective sheet or a reflective layer formed by a coating method, which is not limited in the present invention. In addition, in other embodiments, the reflection function of the first reflective element 260 may also be replaced by the interface reflection between the second optical glue 202 and the external air layer, wherein the refractive index of the second optical glue 202 is related to the external air layer The refractive index is different.

FIG. 11 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200G of FIG. 11 is similar to the detection device 200F of FIG. 10, and therefore the same or corresponding components are denoted by the same or corresponding reference numerals. Different from the detection device 200F, in the embodiment of FIG. 11, the second reflective element 270B and the first reflective element 260B do not partially overlap. In detail, the second reflective element 270B may be located within the area of the first reflective element 260B. In other words, the vertical projection of the second reflective element 270B on the bottom surface 214 can be completely located within the vertical projection of the first reflective element 260B on the bottom surface 214. The light beam L may be sequentially reflected by the front end of the first reflective element 260B, the second reflective element 270B, and the rear end of the first reflective element 260B to be transmitted to the light transmitting element 220.

FIG. 12 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200H of FIG. 12 is similar to the detection device 200F of FIG. 10, and therefore the same or corresponding components are denoted by the same or corresponding reference numerals. Different from the detection device 200F, the detection device 200H of FIG. 12 further includes a third reflection element 280. The third reflective element 280 is disposed on the bottom surface 214 of the light guide element 210. The light beam L is sequentially reflected by the first reflective element 260, the second reflective element 270, and the third reflective element 280 to be transmitted to the light transmitting element 220. The first reflective element 260 is detachable from the third reflective element 280. The first reflective element 260 partially overlaps the second reflective element 270. In detail, the first reflective element 260 overlaps the front end of the second reflective element 270 and does not overlap the rear end of the second reflective element 270. The third reflective element 280 partially overlaps the second reflective element 270. In detail, the third reflective element 280 overlaps the rear end of the second reflective element 270 and does not overlap the front end of the second reflective element 270. In addition, the first reflective element 260, the third reflective element 280, or the sensing element 240 depicted in FIG. 12 need not necessarily be disposed in the second optical glue 202. In other embodiments, the first reflective element 260, the third reflective element 280, or the sensing element 240 may also be disposed on the bottom surface 214 of the light guide element 210; in other words, the first reflective element 260, the third reflective element 280, or It is possible that the sensing element 240 is disposed on the other side of the second optical glue 202.

It should be noted that, in any of the embodiments shown in FIGS. 9 to 12, the light guide element 210 has a side wall 219 connected to the top surface 212 and the bottom surface 214, and the side wall 219 may be provided on the side wall 219. Light absorbing layer (not shown).

FIG. 13 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200I of FIG. 13 is similar to the detection device 200E of FIG. 9, and therefore the same or corresponding components are denoted by the same or corresponding reference numerals. Different from the detection device 200E, in the embodiment of FIG. 13, at least one of the second reflective element 270D and the first reflective element 260D has one or more optical microstructures 276, 266. For example, the second reflective element 270D and the first reflective element 260D may each optionally have one or more optical microstructures 276, 266. In an example of this embodiment, if multiple optical microstructures 276, 266 persons, can be arranged on the second reflection element 270D and the first reflection element 260D in a continuous or spaced manner. In summary, the optical microstructures referred to in this specification may be arranged on any reflective element in a comprehensive or partial manner, and there is no limitation on whether the optical microstructures are continuously arranged or spaced. The light beam L may be reflected by one or more optical microstructures 276 of the second reflective element 270D and / or one or more optical microstructures 266 of the first reflective element 260D, and transmitted by the light transmitting element 220. In this embodiment, the optical microstructures 276 may be comprehensively (or locally) disposed on the second reflective element 270D, and the optical microstructures 266 may be comprehensively (or partially) disposed on the first reflective element 260D. on. In addition, the function of disposing the optical microstructure 276 and / or the first reflecting element 260D is to increase the image capturing area and make the light beam L transmitted to the sensing element 240 more uniform, which is beneficial to the imaging effect.

FIG. 14 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 15 is a schematic top view of the detection device of FIG. 14. The detection device 200J of FIGS. 14 and 15 is similar to the detection device 200E of FIG. 9, and therefore the same or corresponding components are represented by the same or corresponding reference numerals. Different from the detection device 200E, the detection device 200E further includes a light absorption layer 292. The light absorbing layer 292 can absorb light. In other words, the light absorbing layer 292 may be an opaque and non-reflective light shielding layer. The light absorption layer 292 covers the sidewall 219 of the light guide element 210. The light absorption layer 292 can absorb the stray light beam L incident on the side wall 219, thereby improving the image pickup quality of the detection device 200J. In this embodiment, the light absorbing layer 292 may be an ink layer or an adhesive member. However, the present invention is not limited to this. In other embodiments, the light absorbing layer 292 may be other suitable light absorbing materials.

FIG. 16 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 17 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 18 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 19 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection devices 200K, 200L, 200M, and 200N of Figs. 16, 17, 18, and 19 are similar to the detection devices 200F, 200G, 200H, and 200I of Figs. 10, 11, 12, and 13, respectively, and they are the same or similar. Corresponding elements are denoted by the same or corresponding reference numerals. The main differences between the detection devices 200K, 200L, 200M, and 200N and the detection devices 200F, 200G, 200H, and 200I are that the detection devices 200K, 200L, 200M, and 200N have more than the detection devices 200F, 200G, 200H, and 200I, which cover the side wall 219 Light absorbing layer 292.

FIG. 20 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200O of FIG. 20 is similar to the detection device 200E of FIG. 9, and the same or corresponding components are denoted by the same or corresponding reference numerals. The main difference between the detection device 200O and the detection device 200E is that the detection device 200O has a light absorbing layer 292 more than the detection device 200. The light absorption layer 292 covers at least the side wall 219 of the light guide element 210. In the embodiment of FIG. 20, the light absorption layer 292 can also selectively cover the sidewall of the first optical glue 201 and / or the sidewall of the second optical glue 202, but the present invention is not limited thereto.

FIG. 21 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. Referring to FIG. 21, the detection device 200P includes a light guide element 210. The light guide element 210 has a top surface 212 and a bottom surface 214 opposite to each other. The detection device 200P includes a light transmitting element 220. The light transmitting element 220 is disposed on the top surface 212 of the light guiding element 210. The light transmitting element 220 has a surface 222 that faces away from the light guiding element 210.

The detection device 200P includes a second reflection element 270 and a first reflection element 260. The second reflection element 270 is disposed on the top surface 212 of the light guide element 210. The second reflecting element 270 is located between the light transmitting element 220 and the light guiding element 210. The first reflective element 260 is disposed on a bottom surface 214 of the light guide element 210. The light guide element 210 is located between the second reflective element 270 and the first reflective element 260. In this embodiment, the first reflective element 260 may be located within the area of the second reflective element 270, but the present invention is not limited thereto. The detection device 200P includes a light emitting element 230. The light emitting element 230 is used for emitting a light beam L. The light beam L is reflected by the second reflective element 270 and the first reflective element 260 and transmitted to the light transmitting element 220, and a total reflection occurs at the interface (ie, the surface 222) of the light transmitting element 220 and the environmental medium 1. The detection device 200P includes a sensing element 240. The sensing element 240 is disposed on the bottom surface 214 of the light guide element 210. The light guide element 210 is located between the light transmitting element 220 and the sensing element 240. The sensing element 240 has a light-receiving surface 240 a facing the light guiding element 210.

It is worth noting that the detection device 200P includes a first light absorbing element 291. The first light absorbing element 291 is disposed on the bottom surface 214 of the light guiding element 210. The first light absorbing element 291 can absorb the stray light beam L transmitted to the bottom surface 214, thereby improving the image pickup quality of the detection device 200P. In this embodiment, the first light absorbing element 291 may be disposed beside the first reflective element 260 without overlapping the first reflective element 260. Furthermore, the detection device 200P further includes a third reflective element 280. The third reflective element 280 is disposed on the bottom surface 214 of the light guide element 210. The first light absorbing element 291 may be located between the first reflective element 260 and the third reflective element 280. The light beam L is reflected by the second reflective element 270, the first reflective element 260, and the third reflective element 280 and transmitted to the light transmitting element 220.

22 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200Q of FIG. 22 is similar to the detection device 200P of FIG. 21, and therefore the same or corresponding components are denoted by the same or corresponding reference numerals. The main difference between the detection device 200Q and the detection device 200P is that the detection device 200Q further includes a fourth reflective element 293. The fourth reflective element 293 is disposed on the top surface 212 of the light guide element 210 and is separated from the second reflective element 270. The light beam L is reflected by the second reflective element 270, the first reflective element 260, the third reflective element 280, and the fourth reflective element 293 and transmitted to the light transmitting element 220. In this embodiment, the light beam L may be sequentially reflected by the second reflective element 270, the first reflective element 260, the fourth reflective element 293, and the third reflective element 280 and transmitted to the light transmitting element 220.

FIG. 23 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200R of FIG. 23 is similar to the detection device 200P of FIG. 21, and therefore the same or corresponding components are represented by the same or corresponding reference numerals. The main difference between the detection device 200R and the detection device 200P is that the detection device 200R further includes a second light absorbing element 296. The second light absorbing element 296 is disposed on the top surface 212 of the light guiding element 210. The second light absorbing element 296 can absorb the stray light beam L transmitted to the top surface 212, thereby improving the image capturing quality of the detection device 200B. In this embodiment, the second light absorbing element 296 may be selectively disposed on the second reflective element 270 and located between the second reflective element 270 and the bottom surface 214 of the light guide element 210. The first light absorbing element 291 and the second light absorbing element 296 may be staggered without overlapping in a direction d perpendicular to the surface 222.

FIG. 24 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200S of FIG. 24 is similar to the detection device 200P of FIG. 21, and therefore the same or corresponding components are represented by the same or corresponding reference numerals. The main difference between the detection device 200S and the detection device 200P is that the first light absorption element 291C of the detection device 200P is disposed on the first reflection element 260 and is located between the top surface 212 of the light guide element 210 and the first reflection element 260.

FIG. 25 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The detection device 200T of FIG. 25 is similar to the detection device 200Q of FIG. 22, and therefore the same or corresponding components are represented by the same or corresponding reference numerals. The main difference between the detection device 200T and the detection device 200Q is that the detection device 200T does not include the third reflection element 280 of the detection device 200Q. The first reflection element 260D of the detection device 200T is at least composed of the second reflection element 270 and the fourth reflection element 293 The gap g extends directly below the end of the fourth reflective element 293, and the first light absorbing element 291D may be disposed on the first reflective element 260D and located on the bottom surface 214 of the light guide element 210 and the first reflective element 260D. between.

It should be noted that, in another modified embodiment from FIG. 21 to FIG. 25, the light guide element 210 has a top surface 212 and a bottom surface opposite to each other, and a side wall 219 connected to the top surface and the bottom surface 214. 219 may also be covered with a light absorbing layer 294. In addition, the light guide element 210 of any one of FIG. 93 to FIG. 97 may be a light-transmitting plate or an optical glue filled in the space occupied by the light guide element 210 (multi-layer light guide medium may also be used as shown in FIG. 9). New types are not restricted

Please refer to Figs. 1, 3, 4, 6, 7, 9, 9, 10, 11, 12, 13, 14, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, and 25, the detection devices 200, 200A to 200T each include a respective surface plasma resonance (SPR) layer SPR.

Please refer to FIG. 26 and FIG. 27. FIG. 26 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 27 is a partially enlarged schematic view of the plurality of anti-reflection microstructures in region II in FIG. 26. One embodiment of the present invention provides a detection device 200U. The detection device 200U is used in an environmental medium. In one embodiment, the aforementioned environmental medium is, for example, air, water, or other types of environmental media. The detection device U can be used for capturing an image of an object F1 for identification. The aforementioned object F1 is, for example, a user's finger, palm, wrist, or eyeball, and the image captured by the detection device 200U is, for example, an image such as a fingerprint, palm print, vein, pupil, or iris, but the present invention is not limited thereto .

As shown in FIG. 26, a detection device 200U according to an embodiment of the present invention includes a substrate 14, a light emitting element 230, a light guiding element 210, a light transmitting element 220, and a sensing element 240. The light guide element 210 is used for transmitting a light beam therein. The light guide element 210 of this embodiment has a top surface 212 and a bottom surface 214 opposite to the top surface 212, and the light guide element 210 has a light incident portion E1 and a light exit portion E2 located on the bottom surface 214. The light beam L enters the light guide element 210 from the light entrance part E1 and is transmitted in the light guide element 210. Then, a signal beam L 'is formed by at least one total reflection, and then the light guide part 210 of the light guide element 210 leaves the light guide element 210. In this embodiment, a plurality of anti-reflection microstructures 300 are provided in the light-exiting portion E2 of the light guide element 210.

It should be noted that when the signal light beam L 'enters the environmental medium (such as air or air bubbles) from the light guide element 210, in order to avoid the angle of the light beam projecting to the light exit portion E2 being greater than the critical angle of the total reflection of the light guide element 210 As a result, the signal light beam L ′, which should have been emitted by the light-exiting section E2, is totally reflected again. Therefore, in this embodiment, the light-emitting portion E2 has a plurality of anti-reflection microstructures 300 to destroy the total reflection of the signal light beam L '.

Specifically, each AR microstructure 300 has a light receiving area 301 and a backlight area 302. In this embodiment, the light receiving region 301 makes the incident angle of the signal beam L 'smaller than the critical angle of total reflection of the light guide element 210, and the backlight region 302 makes the incident angle of the signal beam L' larger than the critical angle of total reflection. In one embodiment, the backlight region 302 is substantially parallel to the main traveling direction of the signal beam L ', so that the signal beam L' is less likely to be projected on the backlight region 302. On the other hand, the light-receiving area 301 is approximately perpendicular to the main traveling direction of the light beam, and the area of the light-receiving area 301 will be larger than the area of the backlight area 302, so that most of the signal beam L 'is projected onto the light-receiving area 301 and onto the light-receiving area. The signal beam L 'of the region 301 is also less likely to be totally reflected.

Here, please continue to refer to FIGS. 26 to 27. It should be noted that although a small part of stray light may be projected to the backlight region 302, the stray light projected to the backlight region 302 will be totally reflected instead of being emitted from the light. The signal emitted from the part E2 and disturbing the sensing element 240 causes ghosting. In addition, after the signal light beam L 'passes through the light receiving area 301, a part of the light beam is refracted into a light beam with a larger angle when passing through the backlight area 302 after the light receiving surface 240a of the sensing element 240, and this light beam will pass through the light transmitting element 220 The surface 222 is totally reflected, so the angle of the totally reflected beam is larger than the original path, which causes the beam to travel farther than the original path, so it will not enter the light receiving surface 240a of the sensing element 240 again, thereby avoiding signals Causes ghosting.

Referring to FIG. 27, in this embodiment, a plurality of anti-reflection microstructures 300 are connected to each other, and a cross-sectional shape of each of the anti-reflection microstructures 300 may be mountain-shaped, wave-shaped, or zigzag-shaped. In the embodiment of FIG. 27, the cross-sectional shape of each anti-reflection microstructure 300 is zigzag. In addition, the light receiving region 301 and the backlight region 302 of this embodiment are both inclined planes.

Please refer to FIG. 27 and FIG. 28 for cooperation. FIG. 28 is a partial bottom view of a light guide element according to an embodiment of the present invention. Further, in this embodiment, each of the anti-reflection microstructures 300 is an asymmetric convex pillar, and the asymmetric convex pillars extend along the first direction D1 and are arranged side by side along the second direction D2.

Each asymmetric convex pillar has a ridge line 300R, that is, a boundary line between the light receiving area 301 and the backlight area 302. In this embodiment, a vertical reference plane R1 passing through the ridge line 300R is defined. As shown in FIG. 27, the vertical reference plane R1 is parallel to the third direction D3, that is, parallel to the thickness direction of the light guide element 210. The light receiving region 301 and the backlight region 302 are located on two opposite sides of the vertical reference plane R1, respectively. The light receiving region 301 and the vertical reference plane R1 form a first included angle θ1, and the backlight region 302 and the vertical reference plane R1 form a second included angle θ2. In this embodiment, the first included angle θ1 is larger than the second included angle θ2 to ensure that most of the light beam can be projected to the light receiving area 301 and will not be totally reflected again. In addition, in this embodiment, for two adjacent anti-reflection microstructures 300, the edges of the light-receiving region 301 of one of the anti-reflection microstructures 300 coincide with the edges of the backlight region 302 of the other anti-reflection microstructure 300 . That is, a connection region for connecting the two anti-reflection microstructures 300 is not formed between two adjacent anti-reflection microstructures 300 to further reduce the probability that the light beam is totally reflected. However, in other embodiments, as long as the inclination of the connection area with respect to the vertical reference plane R1 can prevent the light beam from being totally reflected, or does not affect the travel path of the light beam, it can also be between every two adjacent anti-reflection microstructures 300 Set the connection area.

In addition, the appearance of the anti-reflection microstructure 300 in the embodiment of the present invention is not limited to asymmetric convex pillars, and the light receiving area 301 and the backlight area 302 may also be curved surfaces, where the curved surfaces include, for example, concave surfaces or convex surfaces. Please refer to FIG. 29, which is a schematic bottom view of a part of a light guide element according to an embodiment of the present invention. In this embodiment, the plurality of AR microstructures 300 are arranged in an array, and each AR microstructure 300 is an eccentric microlens. As shown in FIG. 29, the bottom cross-sectional shape of each anti-reflection microstructure 300 is circular. However, when viewed from the bottom view direction, the apex 300C of the anti-reflection microstructure 300 is offset from the center of the bottom cross-sectional shape (round) . That is, the apex 300C of the anti-reflection microstructure 300 is not aligned with the center of the bottom cross-sectional shape (circular). In this embodiment, an edge of each AR coating microstructure 300 and an edge of another AR coating microstructure 300 are connected to each other.

In addition, in this embodiment, the vertices 300C of all the AR microstructures 300 defined in the same row arranged along the first direction D1 form a line P2, and the line P2 can form the surface of each AR microstructure 300 The area is divided into a light receiving area 301 and a backlight area 302. Specifically, the light receiving area 301 is a surface area located on the right half of the line P2, and the backlight area 302 is a surface area located on the left half of the line P2. It can also be seen from FIG. 29 that the area of the light receiving area 301 is larger than the area of the backlight area 302.

Please refer to FIG. 30, which is a schematic partial cross-sectional view of a light guide element according to an embodiment of the present invention. Specifically, FIG. 30 may be a schematic cross-sectional view of the plurality of anti-reflection microstructures 300 in the second direction D2 in FIG. 29. In this embodiment, the cross-sectional shape of the anti-reflection microstructure 300 is substantially wavy or mountain-shaped, that is, the light receiving region 301 and the backlight region 102 are both curved.

In addition, a first included angle θ1 is formed between the cut plane passing through any point of the light receiving region 301 and the vertical reference plane R1 passing through the vertex 300C, and a cut plane passing through any point of the backlight region 302 and the vertical reference plane R1 passing through the vertex 300C forms a first angle θ1. The second included angle, and the first included angle is greater than the second included angle. According to this, when the light beam is projected to the light receiving area 301, it is possible to ensure that the incident angle of the light beam is smaller than the critical angle of total reflection of the light guide element 210 to prevent the light beam from being totally reflected.

In other embodiments, the anti-reflection microstructure 300 may also be another kind of eccentric cone, such as an eccentric polygonal cone, that is, the bottom cross-sectional shape of the anti-reflection microstructure 300 is triangular, quadrangular, or other polygon. As long as the proportion of the total reflection of the light beam can be reduced (or the proportion of the light beam penetrating the light exit portion E2 can be increased), the shape of the anti-reflection microstructure 300 is not limited by the present embodiment.

Please refer to FIG. 26 again. The detection device 200U of this embodiment further includes a light transmitting element 220. The light-transmitting element 220 is disposed on the top surface 212 of the light-guiding element 210 and has a surface 222 that is in contact with the environmental medium and faces away from the light-guiding element 210. If the detection device 200 is used in an optical fingerprint recognition system to capture fingerprints and / or vein images, the surface 222 of the light-transmitting element 220 can be touched or pressed by a finger for detection and identification.

The detection device 200U further includes a substrate 14, a light emitting element 230, and a sensing element 240 located on the second side of the light guide element 210. The light emitting element 230 and the sensing element 240 are both disposed on the substrate 14. The substrate 14 may be a circuit board, which already has pre-configured circuits. The material of the substrate 14 is a light absorbing material.

The sensing element 240 is disposed on the substrate 14 corresponding to the plurality of anti-reflection microstructures 300 of the light guide element 210 to capture an image of the object F1. In other words, the light guide element 210 is located between the sensing element 240 and the light transmitting element 220.

The sensing element 240 has a light receiving surface 240 a to receive the light beam L emitted from the light emitting portion E2 of the light guiding element 210. In other words, after passing through the plurality of anti-reflection microstructures 300, the light beam is projected onto the light receiving surface 240a of the sensing element 240.

The light emitting element 230 is disposed on the substrate 14 adjacent to the light incident portion E1 of the light guiding element 210 for generating a light beam L transmitted in the light guiding element 210. In this embodiment, the light emitting element 230 is disposed outside the light guiding element 210, and the light beam L generated by the light emitting element 230 is projected to a light incident portion E1 of the light guiding element 210.

Further, the bottom surface 214 of the light guide element 210 of the present embodiment further includes a first recessed portion C1 for receiving the light emitting element 230 and a second recessed portion C2 for receiving the sensing element 240. The light incident portion E1 of the light guide element 210 is located in the first recessed portion C1, and the light exit portion E2 of the light guide element 210 is located in the second recessed portion C2.

As shown in FIG. 26, when the light-emitting element, the light-guiding element 210, and the sensing element 240 are all disposed on the substrate 14, the light-emitting element 230 can be accommodated and clamped in the first recessed portion C1, and the sensing element 240 It can be accommodated and clamped in the second recess C2. In addition, in this embodiment, the plurality of anti-reflection microstructures 300 are located at the bottom of the second recessed portion C2. In this way, the entire volume of the detection device 200 can be reduced. However, in other embodiments, the first concave portion C1 and the second concave portion C2 may be omitted. In another embodiment, the light emitting element 230 may be buried in the light guide element 210. Specifically, after the light-emitting element 230 is fixed on the substrate 14, the light-guiding element 210 may be formed through steps such as potting and curing, so that the light-emitting element 230 is buried in the light-guiding element 210. At this time, the light beam L generated by the light emitting element 230 is directly transmitted in the light guide element 210 without passing through another medium. In addition, the light-emitting element 230 of the present embodiment is disposed on the bottom surface 214 of the light-guiding element 210. However, in other embodiments, the light-emitting element 230 may be disposed on the top surface 212 of the light-guiding element 210.

In addition, the detection device 200U of the present embodiment further includes a second reflective element 270 and a first reflective element 260. The second reflective element 270 and the first reflective element 260 are respectively disposed on the top surface 212 and the bottom surface 214 of the light guide element 210. Specifically, the second reflective element 270 is located between the light transmitting element 220 and the light guide element 210, and the first reflective element 260 is located between the substrate 14 and the light guide element 210. In an embodiment, the second reflective element 270 and the first reflective element 260 may be a reflective sheet or a reflective film layer formed on the surface of the light guide element 210, which is not limited in the present invention. In addition, in this embodiment, the second reflective element 270 and the first reflective element 260 may be staggered from each other and at least partially overlap in the thickness direction of the light guide element 210 to guide the light beam L to the light transmitting element 220. . In other embodiments, the second reflective element 270 and the first reflective element 260 may be completely staggered without overlapping. Therefore, as long as the light beam L can be guided to the light-transmitting element 220, the present invention does not limit the relative position of the second reflection element 270 and the first reflection element 260 or a form of reflecting the light beam L.

For example, in other embodiments, the traveling direction of the light beam L may also be designed so that the light beam L generates total reflection between the light guide element 210 and the environmental medium. In this case, the first reflective element 260 may be omitted. Generally speaking, after the light beam L generated by the light emitting element 230 enters the light guide element 210 through the light incident portion E1, it passes through the reflection of the second reflection element 270 and the reflection of the first reflection element 260 in order, and the light guide element 210 The inward transmission to the light-transmitting element 220 results in total reflection at the interface between the light-transmitting element 220 and the environmental medium, that is, the surface 222 of the light-transmitting element 220.

When the object F1 (eg, a finger) contacts the surface 222 of the light-transmitting element 220, the convex pattern of the finger contacts the surface 222, and a part of the light beam L cannot be totally reflected, so that the sensing element 240 obtains the darkness corresponding to the convex pattern of the finger Pattern. On the other hand, the indentation of the finger does not contact the surface 222 of the light-transmitting element 220, so that another part of the light beam L can still be totally reflected to form a signal light beam L '. The signal light beam L 'is projected toward the light emitting portion E2 of the light guide element 210, and is projected toward the light receiving surface 240a of the sensing element 240 through the plurality of anti-reflection microstructures 300 of the light guide element 210. Subsequently, an image processing element is used to image process the signal beam L 'received by the sensing element 240 to obtain a fingerprint image of the object F1.

That is, in the embodiment of the present invention, by providing the anti-reflection microstructure 300 at the light-exiting portion E2 of the light guide element 210, the signal beam L 'can be prevented from being totally reflected again before entering the sensing element 240, thereby reducing the detection device. Image recognition of 200.

Please refer to FIG. 31, which is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The same or corresponding components of the detection device 200V of FIG. 31 and the detection device 200U of FIG. 26 have the same reference numerals, and the same parts are not described again. In the embodiment of FIG. 31, the detection device 200V further includes a third reflective element 280 located on the bottom surface 214 of the light guide element 210. That is, the first reflective element 260 and the third reflective element 280 are located on the same surface of the light guide element 210, but are disposed apart from each other. In this embodiment, the light beam L is reflected by the second reflective element 270, the first reflective element 260, and the third reflective element 280 to be transmitted within the light guide element 210 and projected to the light transmitting element 220.

In this embodiment, the second reflection element 270 and the first reflection element 260 are completely overlapped in the thickness direction of the light guide element 210, and the second reflection element 270 and the third reflection element 280 are in the thickness direction of the light guide element 210 It only partially overlaps. In addition, the detection device 200V of this embodiment further includes a light absorbing element 291 disposed between the first reflective element 260 and the third reflective element 280. In this embodiment, the light absorption element 291 and the second reflection element 270 overlap in the thickness direction of the light guide element 210. Further, the vertical projection of the second reflecting element 270 may at least partially overlap the light absorbing element 291. The light absorbing element 291 may be a shielding layer that is opaque and non-reflective to the light beam L, such as an ink layer or an adhesive layer, or a shielding sheet, but the foregoing examples are not intended to limit the scope of the present invention.

In other embodiments, other light absorbing elements (not shown) may be provided in other areas of the light guide element 210, that is, areas where the second reflective element 270, the first reflective element 260, and the third reflective element 280 are not provided. For example, the detection device 200V may further include a plurality of light absorbing elements (not shown) disposed on two opposite side walls of the light guide element 210. The aforementioned side wall surface refers to the top surface 212 connected to the light guide element 210. And the bottom surface 214.

The light absorbing element 291 can absorb and reduce stray light that does not follow a predetermined optical path, thereby preventing the sensing element 240 from receiving stray light from outside the signal light beam L '. In addition, the configuration of the light absorbing element 291 can increase the image pickup area and make the signal light beam L 'transmitted to the sensing element 240 more uniform, which is beneficial to improving the imaging quality.

Please continue to refer to FIG. 32, which is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The same or corresponding components of the detection device 200W of FIG. 32 and the detection device 200V of FIG. 31 have the same reference numerals, and the same parts are not described again. In the embodiment of FIG. 32, the detection device 200W further includes a fourth reflective element 290 located on the top surface 212 of the light guide element 210. That is, the second reflective element 270 and the fourth reflective element 290 are located on the same surface of the light guide element 210, but are disposed apart from each other. In this embodiment, the light beam L is sequentially reflected by the second reflective element 270, the first reflective element 260, the fourth reflective element 290, and the third reflective element 280 to be transmitted within the light guide element 210 and projected. To the light transmitting element 220.

In this embodiment, the second reflection element 270 and the first reflection element 260 at least partially overlap in the thickness direction of the light guide element 10, and the fourth reflection element 290 and the third reflection element 280 are in the thickness direction of the light guide element 210 The top is also partially overlapping. However, the second reflection element 270 and the third reflection element 280 do not overlap at all in the thickness direction of the light guide element 210.

In addition, the detection device 200W of this embodiment includes a light absorbing element 291a disposed between the first reflective element 260 and the third reflective element 280, and further includes a second reflective element 270 and a third reflective element 280. Between another light absorbing element 291b. In this embodiment, the two light absorbing elements 291 a and 291 b and the second reflection element 270 at least partially overlap in the thickness direction of the light guide element 210. Similar to the embodiment of FIG. 31, the two light absorbing elements 291a and 291b can absorb and reduce stray light that does not follow a predetermined optical path, thereby preventing the sensing element 240 from receiving stray light from outside the signal light beam L '. In addition, the configuration of the light absorbing element 291 can increase the image pickup area and make the signal light beam L 'transmitted to the sensing element 240 more uniform, which is beneficial to improving the imaging quality.

In addition, in this embodiment, the detection device 200W further includes a light-shielding object 20 disposed in the first recessed portion C1. The light-shielding object 20 is located between the light-emitting element 230 and the sensing element 240 to prevent the light beam L from directly projecting onto the sensing element 240. On the other hand, the light-shielding object 20 can limit the divergence angle of the light beam L generated by the light-emitting element 230, so that the light beam L can be more accurately controlled to enter the light guide element 210 at a predetermined incident angle. In this way, the optical path of the light beam L can be controlled more accurately, and most of the light beam L can be projected toward the object F1, thereby improving the imaging quality of the sensing element 240.

Please continue to refer to FIG. 33, which is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The same or corresponding components of the detection device 200X of FIG. 33 and the detection device 200V of FIG. 31 have the same reference numerals, and the same parts are not described again.

In the embodiment of FIG. 33, the light guide element 210 includes a plurality of optical microstructures 303 disposed between the first reflective element 260 and the third reflective element 280. In this embodiment, a range in which the plurality of optical microstructures 303 are distributed and the second reflection element 270 at least partially overlap in a thickness direction of the light guide element 210. Further, the vertical projection of the second reflective element 270 may at least partially overlap the range in which the plurality of optical microstructures 303 are distributed.

The shape of each optical microstructure 303 may be the same as that of the aforementioned anti-reflection microstructure 300. For example, the cross-sectional shape of the optical microstructure 303 may also be a zigzag shape, a wave shape, or a mountain shape, but the present invention is not limited thereto.

The plurality of optical microstructures 303 may allow a part of the light beams reflected by the second reflection element 270 to pass through the plurality of optical microstructures 303 and be projected from the light guide element 210. Further, the stray light L1 that does not travel according to a predetermined path may be projected outside the light guide element 210 through the optical microstructure 303 and absorbed by the substrate 14, thereby preventing the sensing element 240 from receiving signals other than the signal beam L ′. Stray light L1. In addition, the configuration of the optical microstructure 303 can increase the image pickup area and make the signal beam L 'transmitted to the sensing element 240 more uniform, which is beneficial to improving the imaging quality.

In addition, similar to the embodiment of FIG. 32, in the embodiment of FIG. 33, the detection device 200X further includes a light shielding object 20 disposed in the first recessed portion C1 to prevent the light beam L from directly projecting onto the sensing element 240. And the divergence angle of the light beam L generated by the light emitting element 230 can be limited, so that the light beam L can be more accurately controlled to enter the light guide element 210 at a predetermined incident angle.

Please continue to refer to FIG. 34, which is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The same or corresponding components of the detection device 200Y of FIG. 34 and the detection device 200W of FIG. 32 have the same or similar reference numerals, and the same parts are not described again.

In the embodiment of FIG. 34, the detection device 200Y includes a light absorbing element 291c disposed on the second reflective element 270 and a fourth reflective element 290, and the light guide element 210 includes a first reflective element 260 and a third reflective element 280. Between multiple optical microstructures 303.

In this embodiment, the range in which the plurality of optical microstructures 303 are distributed and the second reflection element 270 and the fourth reflection element 290 in the thickness direction of the light guide element 210 do not overlap at all. In addition, the light absorption element 291c and the first reflection element 260 at least partially overlap in the thickness direction of the light guide element 210, but the light absorption element 291c and the third reflection element 280 do not overlap at all in the thickness direction of the light guide element 210.

The light absorbing element 291c and the optical microstructure 303 of this embodiment can make stray light L1 that does not travel according to a predetermined path exit from the light guide element 210 and be absorbed by the substrate 14 or directly absorbed by the light absorbing element 291c, thereby avoiding sensation The measurement element 240 receives stray light from outside the signal light beam L ′. In addition, the configuration of the light absorbing element 291c and the optical microstructure 303 can increase the image pickup area and make the signal beam L 'transmitted to the sensing element 240 more uniform, which is conducive to improving the imaging quality.

Please refer to FIG. 35, which is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The same or corresponding components of the detection device 200Z of FIG. 35 and the detection device 200U of FIG. 26 have the same or similar reference numerals, and the same parts are not described again. In this embodiment, the detection device 200Z omits the light transmitting element 220 shown in FIG. 26. According to this, after the light beam L generated by the light emitting element 230 enters the light guide element 210 through the light incident portion E1, it passes through the reflection of the second reflection element 270 and the reflection of the first reflection element 260 in order, and is within the light guide element 210. Transmit and generate total reflection at the interface between the light guide element 210 and the environmental medium, that is, the surface located on the top surface 212 of the light guide element 210.

That is, the surface on the top surface 212 of the light guide element 210 can be used as a contact surface to be contacted by the object F1. When the object F1 (such as a finger) contacts the light guide element 210 from the top surface 212 of the light guide element 210, the convexity of the finger will prevent a part of the light beam L from being totally reflected, so that the sensing element 240 obtains the corresponding finger convexity. Dark lines. On the other hand, the groove of the finger does not contact the surface of the top surface 212 of the light guide element 210, so that another part of the light beam L can still be totally reflected to form a signal light beam L '. The signal light beam L 'is projected toward the light emitting portion E2 of the light guide element 210, and is projected toward the light receiving surface 240a of the sensing element 240 through the plurality of anti-reflection microstructures 300 of the light guide element 210. After that, an image processing element is used to perform image processing on the signal beam L 'received by the sensing element 240 to obtain a fingerprint image of the object F1 and perform identity recognition based on the fingerprint image.

FIG. 36 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. The same or corresponding components of the detection device 200Z of the detection device 200-1 of this example in FIG. 35 have the same or similar reference numerals, and the same parts are not described again.

In this embodiment, the bottom surface 214 of the light guide element 210 does not have the first recessed portion C1 and the second recessed portion C2. That is, the surface of the light guide element 210 on the bottom surface 214 is flat, but the plurality of anti-reflection microstructures 300 are still disposed on the light emitting portion E2 located on the bottom surface 214.

In addition, the detection device 200-1 of this embodiment further includes an optical glue G1. The optical glue G1 is connected between the light guiding element 210 and the substrate 14 so that the light guiding element 210 is fixed on the substrate 14, and the light emitting element 230 and the sensing element 240 are embedded in the optical glue G1. In addition, the refractive index of the optical adhesive G1 will be substantially the same as that of the light guide element 210, for example, it may be greater than or equal to 1.4 and less than or equal to 1.6. Therefore, when the light beam L enters the optical glue G1 from the light guide element 210 or the optical glue G1 enters the light guide element 210, it will advance according to a predetermined optical path without refraction. It should be noted that the optical glue G1 does not fill the gap defined between the sensing element 240 and the light emitting portion E2 (the plurality of anti-reflection microstructures 300). Therefore, the multiple anti-reflection microstructures 300 provided in the light emitting portion E2 can greatly reduce the probability that the signal beam L 'is totally reflected again in the light emitting portion E2, thereby improving the imaging quality of the sensing element 240.

In addition, in this embodiment, the light guide element 210 is located on the top surface (surface 222) of the light guide element 210 and has another recessed portion C3, and the position of the recessed portion C3 corresponds to the position of the second reflective element 270 to reduce the light guide Part of the thickness of the light element 210 is beneficial to provide a thinner detection device for different products.

In addition, the detection devices 200U to 200Y, and 201-1 each include a respective surface plasma resonance (Surface Plasmon Resonance) layer SPR. The functions of the surface plasma resonance layer SPR of the detection devices 200U-200Y and 200-1 are the same as the functions of the surface plasma resonance layer SPR of the detection device 200, and will not be repeated here.

37 is a schematic cross-sectional view of an embodiment of a detection device according to an embodiment of the present invention. Referring to FIG. 37, the detection device 200-2 is adapted to capture a biological characteristic of the user O. In this embodiment, the user O is, for example, a finger, and the biological feature is, for example, a fingerprint or a vein, but is not limited thereto. For example, in another embodiment, the user O may be a palm, and the biological feature may be a palm print.

The detection device 200-2 includes a substrate 14, a light emitting element 230, a sensing element 240, a light shield 20, a first reflection element 260, a light guide element 210, and a second reflection element 270.

The substrate 14 serves as a carrier for the above-mentioned elements, and the substrate 14 may have wiring. For example, the substrate 14 may be a printed circuit board (Printed Circuit Board, PCB), a flexible flexible printed circuit board (Flexible Printed Circuit Board, FPCB), a glass substrate with a circuit, or a ceramic substrate with a circuit. This is the limit.

The light-emitting element 230 is disposed on the substrate 14, and the light-emitting element 230 is electrically connected to a line on the substrate 14. For example, the detection device 200 may further include a connection line CL1, and the light-emitting element 230 is electrically connected to the line on the substrate 14 through the connection line CL1, but is not limited thereto. The light emitting element 230 is adapted to provide a light beam B that illuminates the user O.

The sensing element 240 is disposed on the substrate 14 and is located beside the light emitting element 230. In addition, the sensing element 240 is electrically connected to a line on the substrate 14. For example, the detection device 200 may further include a connection line CL2, and the sensing element 240 is electrically connected to the line on the substrate 14 through the connection line CL2, but is not limited thereto. The sensing element 240 is adapted to receive a portion of the light beam B that is reflected by the user O (such as the light beam BB).

The light-shielding object 20 is disposed on the substrate 14 and is located between the light-emitting element 230 and the sensing element 240. The light-shielding object 20 is adapted to shield the large-angle light beam (such as the light beam BL) emitted by the light-emitting element 230 to avoid interference caused by the large-angle light beam directly irradiating the sensing element 240. For example, the light-shielding object 20 may be made of a light-absorbing material, or formed by forming a light-absorbing layer on a light-transmitting block. In addition, the height of the light shielding object 20 may be greater than or equal to the height of the light emitting element 230 and smaller than the height of the light guiding element 210. That is, the top surface S140T of the light-shielding object 20 may be higher than or flush with the top surface S120T of the light-emitting element 230. In addition, the top surface S140T of the light-shielding object 20 is lower than the top surface 212 of the light guide element 210 to allow a portion of the light beam (such as light beam B) emitted by the light-emitting element 230 to pass. In any feasible example of the present application, the light guide element 210 may be formed by pouring light-transmissive glue material and drying it.

The first reflective element 260 is disposed on the substrate 14 and is located between the light shielding object 20 and the sensing element 240. The first reflecting element 260 is adapted to reflect the light beam B transmitted toward the substrate 14 so that the light beam B is transmitted in a direction away from the substrate 14. For example, the first reflective element 260 may be a reflective sheet or a reflective layer formed on the substrate 14 by at least one of electroplating, printing, etching, pasting, and coating.

The light guide element 210 is disposed on the substrate 14 and covers the light emitting element 230, the sensing element 240, the light-shielding object 20, and the first reflecting element 260. The light guide element 210 may be made of a transparent colloid through a heating process or a light curing process. The light-transmitting colloid may be epoxy, silicon, optical glue, resin, or other suitable light-transmitting materials.

The second reflection element 270 is disposed above the light shielding object 20 and is located between the light emitting element 230 and the sensing element 240. Specifically, the second reflecting element 270 is located at least on the transmission path of the light beam B from the light emitting element 230 and not shielded by the light shielding object 20 to reflect the light beam B transmitted toward the top surface 212 of the light guide element 210 so that the light beam B is directed toward The first reflective element 260 passes. The second reflective element 270 may be a reflective sheet or a reflective layer formed on the light guide element 210 by at least one of electroplating, printing, etching, pasting, and coating. It should be noted that, but in other derived embodiments of FIGS. 37, 38, 41, and 42, the second reflection element 270 may be omitted and disposed above the light guide element 210, as shown in FIG. 43, FIG. 45. Draw.

In this embodiment, the second reflective element 270 is disposed on the top surface 212 of the light guide element 210, but is not limited thereto. The second reflective element 270 may extend from above the light shielding object 20 to above the first reflective element 260, and the second reflective element 270 exposes the sensing element 240. The first reflective element 260 may partially overlap the second reflective element 270, but is not limited thereto. In another embodiment, the first reflective element 260 and the second reflective element 270 may completely overlap or not overlap at all. In addition, the first reflective element 260 and the second reflective element 270 may have the same or different reflectivity.

Since the first reflecting element 260 and the second reflecting element 270 help the light beam B to be reflected multiple times in the light guide element 210, the light beam B transmitted to the detection device 200-2 can be made more uniform, thereby allowing users O can receive light uniformly, which helps the sensing element 240 capture a complete biometric image. Therefore, the detection device 200-2 can have good image quality.

In this embodiment, the user O directly presses on the top surface 212 of the light guide element 210 to perform biometric identification. In one embodiment, the detection device 200-2 may further include a protective cover (not shown) or a protective film (not shown). The protective cover or protective film is disposed on the light guide element 210 and the second reflective element 270, and the user O presses on the surface of the protective cover or protective film away from the second reflective element 270 to perform biometric identification. The protective cover or the protective film can protect the light guide element 210 and the second reflective element 270 (eg, anti-scratch).

38 to 42 are schematic cross-sectional views of other implementations of the detection device of the embodiment of FIG. 1, respectively, in which the same components are denoted by the same reference numerals, and will not be described again below.

Referring to FIG. 38, the main differences between the detection device 200-3 and the detection device 200-2 of FIG. 37 are as follows. In the detection device 200-3, the plurality of microstructures MS may be formed on the surface of at least one of the substrate 14, the second reflective element 270, the light guide element 210, and the first reflective element 260 to increase the light beam B. The amount of reflection makes the beam B more uniform. FIG. 38 schematically illustrates that a plurality of microstructures MS are formed on a surface of the first reflective element 260 away from the substrate 14, but not limited thereto. In another embodiment, the plurality of microstructures MS may be formed on a region of the substrate 14 other than the above-mentioned elements. The plurality of microstructures MS may be formed on the top surface 212 of the light guide element 210, and the second reflective element 270 is disposed on at least a part of the plurality of microstructures MS. The plurality of microstructures MS may be formed on a surface of the second reflective element 270 facing the substrate 14 or a surface remote from the substrate 14.

It is added that the plurality of microstructure MSs may be arranged on the above elements in a comprehensive or partial manner, and the plurality of microstructure MSs may be arranged on the above elements in a continuous or spaced manner. In addition, in any feasible embodiment of the present invention, the plurality of microstructures MS may also be disposed on the first reflective element 260 or the second reflective element 270 in a partially bonded manner. For example, the plurality of microstructures MS and the first reflective element 260 (or the second reflective element 270) may be bonded through a ring-shaped adhesive layer (not shown), wherein the ring-shaped adhesive layer is located on the plurality of micro-structures. Between a part of the structure MS and a part of the first reflective element 260 (or the second reflective element 270), and another part of the plurality of microstructures MS and another of the first reflective element 260 (or the second reflective element 270) An adhesive layer is not provided between one part, so that the plurality of microstructures MS, the annular adhesive layer, and the first reflective element 260 (or the second reflective element 270) surround an air gap layer (not shown).

Under the framework of FIG. 38, the detection device 200-3 may further include a protective cover (not shown) or a protective film (not shown) disposed on the light guide element 210 and the second reflective element 270. For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

Referring to FIG. 39, the main differences between the detection device 200-4 and the detection device 200-2 of FIG. 37 are as follows. In the detection device 200-4, the first reflective element 260 includes a plurality of reflective portions 262 arranged at intervals, and the second reflective element 270 includes a plurality of reflective portions 272 arranged at intervals. Specifically, each of the first reflective element 260 and the second reflective element 270 may be composed of more than one reflective portion (such as a reflective sheet or a reflective layer). When the reflecting element is composed of a plurality of reflecting portions, the reflecting portions may be arranged at intervals. The interval arrangement may include a case of an equally spaced arrangement and an unevenly spaced arrangement (scattered distribution). In another embodiment, only one of the first reflective element 260 and the second reflective element 270 includes a plurality of reflective portions arranged at intervals.

Under the framework of FIG. 39, the detection device 200-4 may further include a protective cover (not shown) or a protective film (not shown) disposed on the light guide element 210 and the second reflective element 270. In addition, a plurality of microstructures MS may be formed on the surface of at least one of the substrate 14, the first reflection element 260 (the reflection portion 262), the light guide element 210, and the second reflection element 270 (the reflection portion 272) (see FIG. 38). ). For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

Referring to FIG. 40, the main differences between the detection device 200-5 and the detection device 200-2 of FIG. 37 are as follows. In the detection device 200-5, the detection device 200-5 further includes a spatial filter element 30 disposed on the sensing element 240 and located between the light guide element 210 and the sensing element 240. The spatial filter element 30 is adapted to collimate the light beam passed to the sensing element 240. In another embodiment, the spatial filtering element 30 may be replaced with a grating. In addition, the spatial filter element 30 and the grating can be fixed on the sensing element 240 through an adhesive layer (not shown) or a fixing mechanism (not shown). Alternatively, the spatial filtering element 30 may be replaced with a fiber array described in the applicant's earlier application, US Patent Application No. 15 / 151,471 or Chinese Patent Application No. 201810194406.6.

Under the structure of FIG. 40, the detection device 200-5 may further include a protective cover (not shown) or a protective film (not shown) disposed on the light guide element 210 and the second reflective element 270. In addition, a plurality of microstructures MS may be formed on the surface of at least one of the substrate 14, the first reflective element 260, the light guide element 210, and the second reflective element 270 (see FIG. 38). In addition, at least one of the first reflective element 260 and the second reflective element 270 may include a plurality of reflective portions arranged at intervals (see FIG. 39). For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

Please refer to FIG. 41. The main differences between the detection device 200-6 and the detection device 200-2 of FIG. 37 are as follows. In the detection device 200-6, the detection device 200-6 further includes a wall structure 40. The wall structure 40 is disposed on the substrate 14, and the wall structure 40 and the substrate 14 form an accommodating space AS accommodating the light emitting element 230, the sensing element 240, the shade 20, and the first reflective element 260. In one embodiment, the wall structure 40 and the substrate 14 may be integrally formed. For example, the wall structure 40 and the substrate 14 may be formed by removing a groove from a base material, wherein the space occupied before the groove is removed is the accommodation space AS. In another embodiment, the wall structure 40 may be fixed on the substrate 14 through a mechanism or an adhesive layer (not shown), and the wall structure 40 and the substrate 14 may have the same or different materials. In addition, the wall structure 40 may also be coated with a light absorbing material on the surface as mentioned in the above embodiment.

Under the framework of FIG. 41, the detection device 200-6 may further include a protective cover (not shown) or a protective film (not shown) disposed on the light guide element 210 and the second reflective element 270. In addition, a plurality of microstructures MS may be formed on the surface of at least one of the substrate 14, the first reflective element 260, the light guide element 210, and the second reflective element 270 (see FIG. 38). In addition, at least one of the first reflective element 260 and the second reflective element 270 may include a plurality of reflective portions arranged at intervals (see FIG. 39). Furthermore, the detection device 200-6 may further include a spatial filter element 30 (see FIG. 40), a grating or an optical fiber array (described in the application) disposed on the sensing element 240 and located between the light guide element 210 and the sensing element 240. U.S. Patent Application No. 15 / 151,471, previously filed). For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

Please refer to FIG. 42. The main differences between the detection device 200-7 and the detection device 200-6 in FIG. 41 are as follows. In the detection device 200-7, the detection device 200-7 further includes a transparent cover TC. The translucent cover TC is disposed on the light guide element 210 and covers the light emitting element 230, the sensing element 240, the light shield 20, the first reflective element 260, the connection line CL1, the connection line CL2, and the wall structure 40. The second reflecting element 270 is disposed on the light-transmitting cover TC.

The transparent cover TC has a glue filling hole TC1 and a vacuum evacuation hole TC2. The glue-filling hole TC1 is suitable for filling the light-transmitting colloid forming the light-guiding element 210, and the vacuum-pumping hole TC2 is suitable for connecting with the vacuum-extracting device to extract the gas in the accommodation space AS when the light-transmitting colloid is filled.

In this embodiment, the transparent cover TC also covers the side wall surface S112S of the wall structure 40, and the filling hole TC1 and the evacuation hole TC2 are respectively formed on the side wall surface of the transparent cover TC to cover the wall structure 40. S112S. The wall structure 40 includes a first through hole TCH1 and a second through hole TCH2. The first through-hole TCH1 and the second through-hole TCH2 are formed in portions of the wall structure 40 on the two opposite sides of the substrate 14, respectively. The first through-hole TCH1 is connected to the filling hole TC1, and the second through-hole TCH2 is evacuated. Hole TC2 is connected. However, the new model is not limited to this. The glue filling hole TC1 and the evacuation hole TC2 may be formed on a portion of the light-transmitting cover TC on the substrate 14, so that the wall structure 40 may not need to form the first through hole TCH1 and the second through hole TCH2.

In the framework of FIG. 42, the detection device 200-7 may further include a protective cover (not shown) or a protective film (not shown) disposed on the light-transmitting cover TC and the second reflective element 270. In addition, a plurality of microstructures MS may be formed on the surface of at least one of the substrate 14, the first reflective element 260, the light guide element 210, and the second reflective element 270 (see FIG. 38). In addition, at least one of the first reflective element 260 and the second reflective element 270 may include a plurality of reflective portions arranged at intervals (see FIG. 39). Furthermore, the detection device 200-7 may further include a spatial filtering element 30 (see FIG. 40), a grating or a fiber array (described in the application) disposed on the sensing element 240 and located between the light guide element 210 and the sensing element 240. (U.S. Patent Application No. 15 / 151,471 or Chinese Patent Application No. 201810194406.6). For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

FIG. 43 is a schematic cross-sectional view of an embodiment of a detection device according to an embodiment of the present invention. Referring to FIG. 43, the detection device 200-8 is similar to the detection device 200-2 in FIG. 37, in which the same components are denoted by the same reference numerals, and will not be described again below. The main differences between the detection device 200-8 and the detection device 200-2 of FIG. 37 are as follows. In the detection device 200-8, the detection device 200-8 further includes a light transmitting base 70. The light-transmitting base 70 is disposed on the substrate 14 and covers the light-shielding object 20.

In the present embodiment, the light-transmitting base 70 is a light-transmitting casing covering the light-shielding object 20, and the light-transmitting casing and the substrate 14 form a closed space CS that accommodates the light-shielding object 20. The shade 20 may not fill the closed space CS, that is, there may be a gap between the shade 20 and the transparent case. The gap may be filled with an adhesive material for fixing the light-shielding object 20 and the light-transmitting casing, but is not limited thereto. In another embodiment, the light-transmitting base 70 may be a light-transmitting layer formed on a side wall surface and a top surface of the light-shielding object 20 by at least one of electroplating, printing, etching, pasting, and coating, and The light-transmitting layer may be made of more than one layer of light-transmitting material.

In this embodiment, the transparent base 70 does not cover the first reflective element 260, that is, the transparent base 70 does not overlap the first reflective element 260, but it is not limited thereto. In another embodiment, the transparent base 70 may cover a portion of the first reflective element 260 adjacent to the transparent base 70 such that the transparent base 70 partially overlaps the first reflective element 260.

The second reflection element 270 is disposed on the top surface S210T of the light-transmitting base 70, and the top surface S170T of the second reflection element 270 may be flush with the top surface 212 of the light guide element 210. That is, the top surface S170T of the second reflective element 270 and the top surface 212 of the light guide element 210 have the same height, but not limited thereto. In another embodiment, the top surface S170T of the second reflection element 270 may be lower than the top surface 212 of the light guide element 210, and the light guide element 210 may further cover the second reflection element 270 and the second reflection element 270. Transparent base 70.

Under the architecture of FIG. 43, the detection device 200-8 may further include a protective cover (not shown) or a protective film (not shown) disposed on the light guide element 210 and the second reflective element 270. In addition, a plurality of microstructures MS may be formed on the surface of at least one of the substrate 14, the first reflective element 260, the light guide element 210, and the second reflective element 270 (see FIG. 38). In addition, at least one of the first reflective element 260 and the second reflective element 270 may include a plurality of reflective portions arranged at intervals (see FIG. 39). Furthermore, the detection device 200-8 may further include a spatial filtering element 30 (see FIG. 40), a grating or a fiber array (described in the application) disposed on the sensing element 240 and located between the light guide element 210 and the sensing element 240. U.S. Patent Application No. 15 / 151,471, previously filed). Furthermore, the detection device 200-8 may further include a wall structure 40 (see FIG. 41). For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

FIG. 44 is a schematic cross-sectional view of another embodiment of a detection device according to an embodiment of the present invention. Referring to FIG. 44, the detection device 200-9 is similar to the detection device 200-8 of FIG. 43, in which the same components are denoted by the same reference numerals, and will not be described again below. The main differences between the detection device 200-9 and the detection device 200-8 of FIG. 43 are as follows. In the detection device 200-9, the detection device 200-9 further includes a wall structure 40 and a transparent cover TC. For related descriptions of the wall structure 40 and the transparent cover TC, please refer to the aforementioned related paragraphs, and will not be repeated here.

In the structure of FIG. 44, the light-transmitting cover TC can protect the light guide element 210 and the second reflection element 270 located underneath. Therefore, it is not necessary to provide a protective cover or a protective film. In addition, a plurality of microstructures MS may be formed on the surface of at least one of the substrate 14, the first reflective element 260, the light guide element 210, and the second reflective element 270 (see FIG. 38). In addition, at least one of the first reflective element 260 and the second reflective element 270 may include a plurality of reflective portions arranged at intervals (see FIG. 39). Furthermore, the detection device 200-9 may further include a spatial filter element 30 (see FIG. 40), a grating or a fiber array (described in the application) disposed on the sensing element 240 and located between the light guide element 210 and the sensing element 240. U.S. Patent Application No. 15 / 151,471, previously filed). For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

FIG. 45 is a schematic cross-sectional view of an embodiment of a detection device according to an embodiment of the present invention. Please refer to FIG. 45. The detection device 200-10 is similar to the detection device 200-2 in FIG. 37, in which the same components are denoted by the same reference numerals, and will not be described again below. The main differences between the detection device 200-10 and the detection device 200-2 of FIG. 37 are as follows. In the detection device 200-10, the second reflection element 270 of FIG. 7 is not arranged. Under this architecture, a part of the light beam B transmitted to the top surface 212 of the light guide element 210 is transmitted to the first reflective element 260 through internal reflection. Specifically, when the thickness T160 of the light guide element 210 falls within a range of 0.3 mm to 1.8 mm, the light guide element 210 is transmitted to the top surface 212 of the light guide element 210 and has an angle not greater than 45 degrees (referred to by the light beam B and the top surface 212). Part of the light beam B can be transmitted to the sensing element 240 through multiple reflections between the top surface 212 and the second reflecting element 270, and transmitted to the top surface 212 of the light guide element 210 and having a length greater than The rest of the light beam at an angle of 45 degrees (referring to the angle between the light beam B and the top surface 212) exits the light guide element 210 through refraction.

FIG. 46 is a schematic cross-sectional view of another embodiment of a detection device according to an embodiment of the present invention. Referring to FIG. 46, the detection device 200-11 is similar to the detection device 200-10 of FIG. 45, in which the same components are denoted by the same reference numerals, and will not be described again below. The main differences between the detection device 200-11 and the detection device 200-10 of FIG. 45 are as follows. In the detection device 200-11, the detection device 200-11 further includes a transparent cover TC. The light-transmitting cover TC is suitable for protecting an element located below it. In addition, the transparent cover TC allows the light beam to pass, so that the light beam from the light emitting element can sequentially pass through the light guide element 210 and the transparent cover TC, and is transmitted to the object to be tested that contacts the transparent cover TC, and is to be tested. The light beam reflected by the measurement object can be sequentially transmitted to the sensing element 240 through the transparent cover TC and the light guiding element 210. For example, the transparent cover TC is a glass cover, but is not limited thereto. Under the structure that the transparent cover TC is disposed on the light guide element 210 and covers the light emitting element 230, the sensing element 240, the light shield 20, the first reflective element 260, and the connection lines CL1 and CL2, the light guide element 210 and light transmittance The total thickness TT of the cover TC falls within the range of 0.3 mm to 1.8 mm to facilitate the formation of internal reflections, so that at least a part of the light beam from the light emitting element 230 can be transmitted to the object to be tested that contacts the transparent cover TC It is then transferred to the sensing element 240.

45 and 46, a plurality of microstructures MS can be formed on the surface of at least one of the substrate 14, the first reflective element 260, and the light guide element 210 (see FIG. 38). In addition, the first reflective element 260 may include a plurality of reflective portions arranged at intervals (see FIG. 39). In addition, at least one of the detection device 200-10 and the detection device 200-11 may further include a spatial filter element 30 (see FIG. 40) disposed on the sensing element 240 and located between the light guide element 210 and the sensing element 240 (see FIG. 40). ), A grating or a plurality of optical fiber arrays or collimating elements arranged obliquely at different angles, etc. (or described in the applicant's previously applied US patent application number 15 / 151,471 or 15 / 989,123). Furthermore, at least one of the detection devices 200-10 and 200-11 may further include a wall structure 40 (see FIG. 41) disposed on the substrate 14. For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

In addition, the detection devices 200-2 to 200-11 each include a respective surface plasma resonance (Surface Plasmon Resonance) layer SPR. The functions of the surface plasma resonance layer SPR of the detection devices 200-2 to 200-11 are the same as the functions of the surface plasma resonance layer SPR of the detection device 200 described above, and will not be repeated here.

47A to 47B are schematic top and cross-sectional views of a detection device according to an embodiment of the present invention, wherein FIG. 47A is a schematic cross-sectional view taken along section line AA ′ of FIG. 47B, and FIG. 47B omits the surface plasma resonance of FIG. 47A. Layer SPR. Referring to FIGS. 47A to 47B, the detection device 200-12 is adapted to capture the biological characteristics of the object 10 to be measured. In this embodiment, the test object 10 is, for example, a finger, and the biological characteristic is, for example, a fingerprint or a vein, but is not limited thereto. For example, in another embodiment, the object under test 10 may also be a palm, and the biological feature may be a palm print.

The detection device 200-12 includes a substrate 14, a plurality of light emitting elements 230, a sensing element 240, and a light guiding element 210.

In order to increase the usability of the packaging structure of the detection device 200-12, a metal ring MR may be provided in the substrate 14. The metal ring MR is located between the upper surface and the lower surface of the substrate 14 and surrounds the sensing area of the sensing element 240. Thereby, when the object under test 10 is pressed on the light guide element 210, the device can be started to operate by inductive electrification, and the packaging structure of the detection device 200-12 can be temporarily stopped when not in use, so that To achieve the effect of energy saving.

The plurality of light emitting elements 230 are disposed on the substrate 14 and are electrically connected to the substrate 14. Each light emitting element 230 has a light emitting surface 230a. The light-emitting surface 230 a of each light-emitting element 230 emits a light beam L toward the test object 10.

The sensing element 240 is disposed on the substrate 14 and is electrically connected to the substrate 14. In addition, the sensing element 240 is located beside the plurality of light-emitting elements 230 and is configured to receive a portion of the light beam L reflected by the object 10 (that is, the reflected light beam L 'with fingerprint pattern information).

In one embodiment, a pulse width modulation circuit may be integrated in the sensing element 240. By controlling the light emitting time of the light emitting element 230 and the image capturing time of the sensing element 240 by the pulse width modulation circuit, the light emitting time of the light emitting element 230 is synchronized with the image capturing time of the sensing element 240, so that the effect of precise control can be achieved. But not limited to this.

The light guide element 210 is disposed on the substrate 14 and covers the sensing element 240 and the plurality of light emitting elements 230. The light guide element 210 is made of, for example, a silicone, a resin, an optical adhesive, an epoxy (Epoxy), or the like through a heating process or a light curing process. Therefore, in addition to preventing electrostatic damage to protect the sensing element 240 and the plurality of light-emitting elements 230, the light guide element 210 can also allow the light beams L emitted by the plurality of light-emitting elements 230 and the light beam L reflected by the object 10 to be measured. 'penetrate.

The light guide element 210 has at least one groove 215 on a side opposite to the sensing element 240, and the at least one groove 215 is located between the sensing element 240 and the plurality of light emitting elements 230. In this embodiment, the plurality of light-emitting elements 230 are located on two opposite sides of the sensing element 240, and the light-guiding element 210 includes two grooves 215, but is not limited thereto.

In this embodiment, the depth Y3 of the trench 215 is smaller than the thickness H4 of the light guide element 210, which means that H3 <H4 is satisfied. In other words, the trench 215 does not need to penetrate the light guide element 210, and thus is easy to fabricate.

In this embodiment, each groove 215 is a long V-shaped groove, and each groove 215 has two inclined surfaces 215a. The two inclined surfaces 215a of the groove 215 can be adjusted by adjusting the surfaces of the inclined surfaces 215a of the corresponding light emitting elements 230 and the light guiding element 210 opposite to the sensing element 240 (such as the touch surface of the object 10). The angle θ complements the angle θ to have an ideal light utilization efficiency. For example, the complementary angle θ falls within a range of 30 degrees to 45 degrees, and the depth Y3 of the at least one groove 215 is determined according to the magnitude of the complementary angle θ. In other embodiments, the cross-sectional shape of each groove 215 may also be an inverted trapezoid, an inverted semicircle, or other shapes. The semicircle generally refers to a non-complete circle, and is not limited to a half of the circle.

The V-shaped groove helps to change the path of the beam L. Specifically, when the light beam L emitted from the light emitting element 230 is transmitted to the inclined surface 215a of the trench 215 close to the light emitting element 230, it enters the trench 215 through the inclined surface 215a close to the light emitting element 230 (ie, exits the light guide element 210). Part of the light beam entering the groove 215 can enter the light guide element 210 through the inclined surface 215 a of the groove 215 close to the sensing element 240. Changing the path of the light beam L by the V-shaped groove helps to prevent the light beam L emitted by the light-emitting element 230 from directly irradiating the sensing element 240, thereby reducing the light interference of the sensing element 240, and improving the detection device 200-12. Discernment.

In this embodiment, the light transmission medium in the trench 215 is air, but it is not limited thereto. In another embodiment, the trench 215 may be filled with a light-transmitting material, wherein the refractive index of the light-transmitting material is greater than the refractive index of the light guide element 210 to better prevent the light beam L emitted by the light-emitting element 230 from directly irradiating the light.测 Element 240. The light-transmitting material is a light-transmitting material with a high refractive index, such as an optical adhesive that can be cured by light or heat, but is not limited thereto.

In addition, the thickness H2 of the sensing element 240 can be made smaller than the thickness H1 of the light emitting element 230, that is, the light emitting surface 230a of the light emitting element 230 is higher than the light receiving surface 240a of the sensing element 240 to further reduce light interference. The thickness H2 of the sensing element 240 refers to the distance from the photosensitive surface 132 of the sensing element 240 to the substrate 14, and the thickness H1 of the light emitting element 230 refers to the distance from the light emitting surface 230 a of the light emitting element 230 to the substrate 14.

A method for making the thickness H2 of the sensing element 240 smaller than the thickness H1 of the light emitting element 230 may be to change the thickness of each of the above elements (the sensing element 240 and the light emitting element 230). Alternatively, when other film layers are provided between the above-mentioned elements and the substrate 14, the thickness of the other film layers may be adjusted so that the thickness H2 of the sensing element 240 is smaller than the thickness H1 of the light-emitting element 230. For example, the detection device 100 further includes a plurality of adhesive layers AD. The adhesive layer AD is respectively disposed between the plurality of light emitting elements 230 and the substrate 14 and between the sensing element 240 and the substrate 14. The adhesive layer AD is, for example, an adhesive gel or a double-sided adhesive. The thickness of each light-emitting element 230 and the adhesive layer AD below it is the thickness H1 of the light-emitting element 230, and the thickness of the sensing element 240 and the adhesive layer AD below it is the thickness H2 of the sensing element 240. The thickness H2 of the sensing element 240 can be made smaller than the thickness H1 of the light-emitting element 230 by changing the thickness of the adhesive layer AD under each light-emitting element 230 and the thickness of the adhesive layer AD under the sensing element 240. However, in another embodiment, the thickness H2 of the sensing element 240 may be equal to or greater than the thickness H1 of the light emitting element 230.

In this embodiment, the detection device 200-12 further includes a plurality of connection lines CL1 and CL2. The connecting lines CL1 and CL2 are respectively connected between the sensing element 240 and the substrate 14 and between the plurality of light emitting elements 230 and the substrate 14, so that the sensing element 240 and the plurality of light emitting elements 230 are electrically connected to the substrate 14 respectively. The material of the plurality of connecting lines CL1 and CL2 is, for example, gold, copper, etc., but is not limited thereto. In another embodiment, the sensing element 240 and the plurality of light emitting elements 230 can also be connected to the circuit on the substrate 14 through solder balls, and the connection lines CL1 and CL2 can be omitted.

The manufacturing method of the detection device 200-12 of this embodiment may include, for example, the following steps. First, a plurality of light-emitting elements 230 and sensing elements 240 are adhered to the substrate 14 by a plurality of adhesive layers AD. The heights of the plurality of light-emitting elements 230 and the sensing elements 240 can be further adjusted by grinding. Secondly, a plurality of connection lines CL1 and CL2 are formed on the substrate 14 by using a wire bonding device. Among them, the plurality of connection lines CL1 and CL2 respectively connect the conductive pads of the plurality of light-emitting elements 230 with the conductive pads of the substrate 14 and the conductivity of the sensing element 240 The pad is a conductive pad with the substrate 14. Next, a translucent colloid is formed on the substrate 14 using a potting device and covers a plurality of light-emitting elements 230, a sensing element 240, and a plurality of connection lines CL1, CL2. Then, the light-transmitting colloid is cured through a heating process (such as a baking process) or a light process (such as an ultraviolet curing process). Finally, by etching, laser engraving, or other existing patterning methods, at least one groove 215 is formed on a side of the cured transparent colloid opposite to the sensing element 240 to form a light guiding element 210. In other embodiments, the light guide element 210 and the at least one groove 215 may be integrally formed by a mold, but the present invention is not limited thereto. In one embodiment, a plurality of image capturing units (including a light emitting element 230, a sensing element 240, and a light guiding element 210) can be manufactured on the substrate 14 at the same time, and a plurality of detection devices 100 are cut by a cutting process.

With the above manufacturing method, the detection device 200-12 of this embodiment can be manufactured as a full-plane fingerprint recognition device, thereby increasing the compatibility with the assembly of other devices. In addition, by the method of laminating and injection molding, the detection device 200-12 of this embodiment can be mass-produced, thereby reducing the production cost. In addition, since the groove 215 of the light guide element 210 can reduce light interference, the setting of the light shielding element can be omitted, thereby simplifying the manufacturing steps, reducing the components required for the manufacturing process, and helping to reduce the module area.

48A to 48B are schematic top and cross-sectional views of a detection device according to an embodiment of the present invention, wherein FIG. 48A is a schematic cross-sectional view taken along section line AA ′ of FIG. 48B, and FIG. 48B omits the surface plasma resonance of FIG. 48A. Layer SPR. Referring to FIG. 48A and FIG. 48B, the detection device 200-13 is similar to the detection device 200-12 of FIG. 47A. The main differences between the two are described below. The detection device 200-13 further includes at least one wall structure 40. The at least one wall structure 40 surrounds the sensing element 240 and the plurality of light-emitting elements 230. The material of the at least one wall structure 40 may be the same as or different from the substrate 14. The present invention is not limited thereto.

In the manufacturing process, the wall structure 40 may be formed after the sensing element 240 and the plurality of light emitting elements 230 are provided and before the light guide element 210. Alternatively, the substrate 14 may be first made into a groove shape, and the protruding portion at the edge of the groove is used as the wall structure 40. In other words, at least one wall structure 40 and the substrate 14 may be integrally formed. The arrangement of at least one wall structure 40 can reduce the problem that the connection lines CL1 and CL2 are broken or the sensing element 240 is lost due to the increase of the filling pressure when the light-transmitting colloid is poured, thereby helping to improve the detection. Yield of device 200-13. At the same time, a better structural strength of the detection device 200-13 is provided. In one embodiment, the wall structure 40 can be removed by a cutting process after the light guide element 210 is formed, so that the detection device 200-12 shown in FIG. 47A can also be formed.

FIG. 49 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. Referring to FIG. 49, the detection device 200-15 is similar to the detection device 100 of FIG. 47A. The main differences between the two are described below. The detection device 200-15 further includes a transparent cover TC. The light-transmitting cover TC is disposed on the light guide element 210 and covers at least one groove 215. The light transmission medium in the at least one groove 215 includes air. The material of the transparent cover TC is, for example, glass or transparent plastic. In one embodiment, the transparent cover TC can be pasted on the light guide element 210 through an adhesive layer (not shown). The adhesive layer may be an adhesive gel or a double-sided adhesive. In this way, it is possible to further enhance the ability to block water vapor and protect the internal components of the detection device 200-15 (such as preventing the light guide element 210 from being scratched). In another implementation, the transparent cover TC can also be fixed to the light guide element 210 by a fixing mechanism, so that the adhesive layer can be omitted.

In the framework of FIG. 49, the detection device 200-15B may further include the wall structure 40 of FIG. 48A. For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

FIG. 50 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. Referring to FIG. 50, the detection device 200-16 is similar to the detection device 200-12 of FIG. 47A. The main differences between the two are described below. The detection device 200-16 further includes a spatial filter element 30. The spatial filter element 30 is disposed on the sensing element 240 and is located between the light guide element 210 and the sensing element 240 to collimate the light beam transmitted to the sensing element 240. The spatial filter element 30 may be, for example, a pinhole collimator or a fiber collimator. In this way, the light intensity of the light beam reflected by the sensing element 240 to be detected by the sensing element 240 can be increased, thereby improving the recognition rate of the detection devices 200-16.

In the structure of FIG. 50, the detection device 200-16 may further include the wall structure 40 of FIG. 48A or the transparent cover TC of FIG. 49. For related descriptions, please refer to the aforementioned related paragraphs, and will not be repeated here.

51A is another schematic cross-sectional view of a groove of a detection device according to an embodiment of the present invention. Referring to FIG. 51, the detection device 200-17 is similar to the detection device 200-12 of FIG. 47A. The main differences between the two are described below. In the detection device 200-17D, the angles of the two apex angles of the groove 215A are different. For example, the angle between the two inclined surfaces 215aA and 215aA adjacent to the corresponding light emitting element 230 and the surface of the light guide element 210 relative to the surface of the sensing element 240 is 66.8 degrees. The complementary angle between the inclined surface 215aA adjacent to the sensing element 240 and the angle between the light guide element 210 and the surface of the sensing element 240 is 32.5 degrees, and the bottom angle of the groove 215A is 90 degrees. In other embodiments, the angles of the two apex angles of the trench 215A may be reversed or changed according to design requirements, without being limited thereto. The depth Y3A of the trench 215A is determined based on the above-mentioned angle. In this embodiment, the depth Y3A of the trench 215A is greater than the distance H5 from the light emitting surface of each light emitting element 230 to the surface of the light guiding element 210 relative to the sensing element 240, but is not limited thereto.

In this embodiment, the groove 215A is filled with a light-transmitting material F2, and the refractive index of the light-transmitting material F2 is greater than the refractive index of the light guide element 210. Therefore, when the light beam L emitted from the light emitting element 230 is transmitted to the groove 215A, a part of the light beam L will be totally reflected by the inclined surface 215aA adjacent to the light emitting element 230, and a part of the light beam L will pass through the inclined surface 215aA adjacent to the light emitting element 230 and be directed toward Passing away from the sensing element 240. In this way, the light beam L emitted from the light-emitting element 230 can be prevented from being directly irradiated to the sensing element 240, thereby reducing light interference.

51B is another schematic cross-sectional view of a groove of a detection device according to an embodiment of the present invention. Referring to FIG. 51B, the detection device 200-18 is similar to the detection device 200-12 of FIG. 47A. The main differences between the two are described below. In the detection device 200-18, the groove 215B is a U-shaped groove. Specifically, the trench 215B has two side surfaces 146 and a bottom surface 148 that are opposite and parallel to each other. Depending on the manufacturing method, the bottom surface 148 may be a flat surface, an inclined surface, or a curved surface.

In addition to the U-shaped groove that can change the path of the beam by refraction, it can also use the side 146 adjacent to the light emitting element 230 to totally internally reflect the beam transmitted to the side 146, so that the beam is transmitted away from the sensing element 240. . In this embodiment, the depth Y3B of the trenches 215B is greater than the distance H5 from the light-emitting surface of each light-emitting element 230 to the surface of the light-guiding element 210 relative to the sensing element 240 so as to be transmitted to the side of the trench 215B adjacent to the light-emitting element 230. Most of the light beams of 146 are transmitted on the side 146 away from the sensing element 240 via total internal reflection.

In a preferred embodiment, the width D2 of the trench 215B (such as the width D2 of the bottom surface 148), the distance D1 from one of the light-emitting elements 230 corresponding to the trench 215B to the trench 215B, and the sensing element 240 to the trench The distance D3 of the groove 215B is one third of the distance D from one of the corresponding light-emitting elements 230 to the sensing element 240, but the present invention is not limited thereto.

In this embodiment, the trench 215B is filled with a light-transmitting material F2. The refractive index of the light-transmitting material F2 is smaller than the refractive index of the light guide element 210 to generate total internal reflection. However, in other embodiments, the light transmitting material F2 may be omitted.

51C to FIG. 51D are schematic cross-sectional views of two more types of grooves of the detection device according to the embodiment of the present invention. Please refer to FIG. 51C and FIG. 51D, the detection devices 200-19, 200-20 are similar to the detection device 200-12 of FIG. 47. The main differences between the two are described below. In the detection devices 200-19, 200-20, and 100G, the grooves 215C and 215D are inverted trapezoidal grooves. Specifically, the groove 215C (or the groove 215D) has two inclined surfaces 215aB (or two inclined surfaces 215aC) and a bottom surface 148. In this embodiment, the inverted trapezoidal grooves of the detection devices 100F and 100G are all inverted isosceles trapezoids, but not limited thereto.

In addition to the inverted trapezoidal groove, which can change the path of the light beam by refraction, the inclined beam 215aB (or inclined plane 215aC) adjacent to the light emitting element 230 can be used to totally internally reflect the light beam transmitted to the inclined plane 215aB (or inclined plane 215aC) so The light beam does not directly hit the sensing surface of the sensing element 240. In the detection devices 200-19, 200-20, the depths Y3C, H3D of the grooves 215C, 215D are smaller than the distance H5 from the light emitting surface of each light emitting element 230 to the surface of the light guide element 210 with respect to the sensing element 240, so that the transmission Most of the light beams to the bottom surface 148 of the grooves 215C, 215D are turned on the bottom surface 148 via total internal reflection, so that they do not directly hit the sensing surface of the sensing element 240 (as shown in FIG. 53A).

In this embodiment, the grooves 215C and 215D are filled with a light-transmitting material F3, wherein the refractive index of the light-transmitting material F3 is smaller than the refractive index of the light guide element 210 to generate total internal reflection.

In addition, the detection devices 200-12 to 200-20 each include a respective surface plasma resonance (Surface Plasmon Resonance) layer SPR. The functions of the surface plasma resonance layer SPR of the detection devices 200-2 to 200-11 are the same as the functions of the surface plasma resonance layer SPR of the detection device 200 described above, and will not be repeated here.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the new model shall be determined by the scope of the attached patent application.

C1, C2, C3 ‧‧‧ Depression

D, k‧‧‧ distance

D1, D2, D3 ‧‧‧ directions

E1, E2‧‧‧Light-emitting Department

α, θ, θ1, θ2, θ _i ‧‧‧ angle

L, L ', L1, B, BB‧‧‧ beam

II‧‧‧Area

F1‧‧‧ Object

S120T, S140T, S1421S, S1441S, S1441C, S1444S, S131, S133A, S133B, S170T, S210T, 160a, 160b, 160c, 212, 214, 215a, 215aA, 215aB, 215aC, 216, 216B, 218, 218A, 218C, 222, P1, 146, 148‧‧‧ faces

SPR‧‧‧Surface Plasma Resonance Layer

P, P1 ～ P5‧‧‧Pitch

T1, T2‧‧‧thickness

H, H1 ～ H5‧‧‧thickness

1‧‧‧ environmental media

14‧‧‧ substrate

20‧‧‧ shade

40‧‧‧wall structure

70‧‧‧light base

80‧‧‧Biopolymer

200, 200 ～ 200Y, 200-1 ～ 200-20‧‧‧ Detection device

230‧‧‧Light-emitting element

240‧‧‧ sensing element

260, 260B‧‧‧Reflective element

260D, 270‧‧‧Reflective element

270B, 270D‧‧‧Reflective element

280, 293‧‧‧Reflective elements

210‧‧‧light guide

201, 202, 250, G1‧‧‧ Optical Adhesive

210-1‧‧‧Thick part

210-2‧‧‧ thin section

213‧‧‧Inner wall

215, 215A, 215B, 215C, 215D

219‧‧‧ sidewall

240a‧‧‧ light receiving surface

262, 272‧‧‧Reflection

266, 276, MS‧‧‧‧ microstructure

291, 291a, 291b, 291c, 291C, 291D, 296‧‧‧ light-absorbing element

292‧‧‧light absorbing layer

300‧‧‧ Anti-reflection Microstructure

300C‧‧‧ Vertex

300R‧‧‧Edge

301‧‧‧light receiving area

302‧‧‧ backlight area

303‧‧‧Optical microstructure

FIG. 1 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a part of a detection device according to an embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a detection device according to another embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 5 is a schematic diagram of a part of a detection device according to an embodiment of the present invention. FIG. 6 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 7 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 8 is a schematic diagram of a part of a detection device according to an embodiment of the present invention. FIG. 9 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 10 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 11 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 12 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 13 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 14 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 15 is a schematic top view of the detection device of FIG. 14. FIG. 16 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 17 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 18 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 19 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 20 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 21 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. 22 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 23 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 24 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 25 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 26 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 27 is a partially enlarged schematic view of the plurality of anti-reflection microstructures in region II in FIG. 26. FIG. 28 is a partial bottom view of a light guide element according to an embodiment of the present invention. FIG. 29 is a partial bottom view of a light guide element according to an embodiment of the present invention. FIG. 30 is a schematic partial cross-sectional view of a light guide element according to an embodiment of the present invention. FIG. 31 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 32 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 33 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 34 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 35 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 36 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. 37 is a schematic cross-sectional view of an embodiment of a detection device according to an embodiment of the present invention. 38 to 42 are schematic cross-sectional views of other embodiments of the detection device of the embodiment shown in FIG. 1, respectively. FIG. 43 is a schematic cross-sectional view of an embodiment of a detection device according to an embodiment of the present invention. FIG. 44 is a schematic cross-sectional view of another embodiment of a detection device according to an embodiment of the present invention. FIG. 45 is a schematic cross-sectional view of an embodiment of a detection device according to an embodiment of the present invention. FIG. 46 is a schematic cross-sectional view of another embodiment of a detection device according to an embodiment of the present invention. 47A to 47B are schematic top and cross-sectional views of a detection device according to an embodiment of the present invention, respectively. 48A to 48B are schematic top and cross-sectional views of a detection device according to an embodiment of the present invention, respectively. FIG. 49 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. FIG. 50 is a schematic cross-sectional view of a detection device according to an embodiment of the present invention. 51A is another schematic cross-sectional view of a groove of a detection device according to an embodiment of the present invention. 51B is another schematic cross-sectional view of a groove of a detection device according to an embodiment of the present invention. 51C to FIG. 51D are schematic cross-sectional views of two more types of grooves of the detection device according to the embodiment of the present invention. FIG. 52 shows the relationship between various reflection angles θ of the sensing light beam L reflected by the surface plasma resonance layer SPR and its reflectance.

Claims (15)

A detection device includes: a light guiding element including: a top surface; and a bottom surface opposite to the top surface; a first reflecting element disposed on the bottom surface of the light guiding element; a sensing element configured Next to the bottom surface of the light guide element; a light emitting element for emitting a light beam, wherein the light beam is reflected by the first reflection element and transmitted to the sensing element; and a surface plasma resonance layer is disposed on the light guide element The light element is used to receive the biopolymer, wherein the light guide element is located between the surface plasma resonance layer and the sensing element. The detection device according to item 1 of the scope of patent application, wherein the light guide element further comprises: a light incident surface connected between the top surface and the bottom surface, wherein the light incident surface and the top surface have an acute angle α . The detection device according to item 2 of the scope of patent application, wherein the detection device is located in an environmental medium, and the acute angle α satisfies the following formula (1): --- (1), where θ _{i is} the angle at which the light beam enters the light guide element from the light incident surface, n _{1 is} the refractive index of the environmental medium, and n _{2 is} the refractive index of the light guide element. The detection device according to item 2 of the scope of patent application, wherein the detection device is located in an environmental medium, and the acute angle α satisfies the following formula (2): --- (2), where θ _{i is} the incident angle of the light beam incident on the light incident surface, n _{1 is} the refractive index of the environmental medium, and n _{2 is} the refractive index of the light guide element. The detection device according to item 1 of the scope of patent application, further comprising: a second reflecting element disposed on the bottom surface of the light guide element, wherein the light beam is reflected by the first reflecting element and the second reflecting element, and Passed to the sensing element. The detection device according to item 1 of the scope of patent application, further comprising: a light transmitting element disposed on the top surface of the light guiding element; a first optical glue disposed on the light transmitting element and the light guiding element Between the top surface, the light transmitting element is connected to the top surface of the light guide element using the first optical glue; and a second optical glue is disposed between the bottom surface of the light guide element and the sensing element. In the meantime, the sensing element is connected to the bottom surface of the light guide element by using the second optical glue, wherein the material of the light guide element is different from the material of the first optical glue and / or the second optical glue. The detection device according to item 6 of the scope of patent application, wherein the light guide element is a glass. The detection device according to item 1 of the patent application range, wherein the bottom mask of the light guide element has a light emitting portion, and the light emitting portion is provided with a plurality of anti-reflection microstructures, wherein the light beam is at least in the light guiding element After at least one total reflection, a signal beam is formed which is directed to the AR microstructures, and the signal beam passes through the AR structures to be projected toward the sensing element. The detection device according to item 8 of the scope of patent application, wherein the light guide element has a critical angle for total reflection, and each of the anti-reflection microstructures includes a light receiving which makes the incident angle of the signal beam smaller than the critical angle for total reflection. Area and a backlight area where the incident angle of the signal beam is greater than the critical angle of total reflection, and the area of the light receiving area is larger than the area of the backlight area. The detection device according to item 9 of the scope of patent application, wherein each of the anti-reflection microstructures is an asymmetric convex column, the asymmetric convex column has an edge line, the light receiving area and a vertical reference plane passing through the edge line. A first included angle is formed therebetween, the backlight region and the vertical reference plane form a second included angle, and the first included angle is greater than the second included angle. The detection device according to item 9 of the scope of patent application, wherein the antireflection microstructures are arranged in an array, and each of the antireflection microstructures is an eccentric microlens, the eccentric microlens has a vertex and passes through the light receiving area A first included angle is formed between a cut surface at any point of the and a vertical reference plane passing through the vertex, a second included angle is formed between the cut surface at any point of the backlight region and the vertical reference plane, and the first included angle is greater than the Two angles. The detection device according to item 1 of the scope of patent application, further comprising: a substrate, the first reflective element is disposed between the substrate and the light guide element; and a light-shielding object is disposed on the substrate and located on the light-emitting element. Between the element and the sensing element, wherein the first reflecting element is located between the light blocking object and the sensing element, and the light guiding element covers the sensing element, the light emitting element, the light blocking object and the first reflection element. The detection device according to item 1 of the scope of patent application, wherein a plurality of microstructures are formed on a surface of at least one of the first reflection element and the light guide element. The detection device according to item 1 of the patent application scope, wherein the first reflective element includes a plurality of reflective portions arranged at intervals. The detection device according to item 1 of the scope of patent application, further comprising: a substrate, wherein the light guide element, the first reflection element, the sensing element, and the light emitting element are disposed on the substrate; a plurality of connection lines, Respectively connected between the substrate and the sensing element and between the substrate and the light-emitting element; and a wall structure arranged on the substrate, wherein the wall structure and the substrate form to accommodate the light-emitting element, the sensor An accommodating space of the measuring element and the first reflecting element.