WO2018209660A1 - Light guide element, photoelectric sensing module, and electronic device - Google Patents

Abstract

A light guide element (200), a photoelectric sensing module (300) on which the light guide element (200) is disposed, and an electronic device (500). The light guide element (200) comprises a light guide portion (210) disposed on a light sensing component and used for removing light outside a preset region to make the light transmitted within the preset region. The light guide element (200) is disposed on the photoelectric sensing module (300). The electronic device (500) comprises the photoelectric sensing module (300).

Description

Light guiding element, photoelectric sensing module and electronic device Technical field

The utility model relates to the field of biometric identification, in particular to a light guiding component, a photoelectric sensing module and an electronic device having the same.

Background technique

At present, photoelectric sensing modules, such as fingerprint identification modules, have gradually become the standard components of electronic products such as mobile terminals. However, the image acquisition accuracy of the photoelectric sensor module needs to be improved.

Utility model content

The embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art. Therefore, the embodiments of the present invention need to provide a light guiding component, a photoelectric sensing module, and an electronic device having the photoelectric sensing module.

A light guiding component according to an embodiment of the present invention includes a light guiding portion disposed on the photosensor member for removing light outside the predetermined area to transmit light in the predetermined region.

In some embodiments, the photosensor device includes a light receiving unit, and the light guiding portion includes a first light guiding portion, and the first light guiding portion is disposed on the light receiving unit.

In some embodiments, the photosensor device further includes a light transmitting unit, the light guiding portion further includes a second light guiding portion, and the second light guiding portion is disposed on the light transmitting unit.

In some embodiments, the light guiding portion includes a plurality of light-passing pipes, and the pipe walls of the plurality of light-passing pipes are fitted to each other to form the predetermined area.

In some embodiments, the diameter of the light-passing conduit of the light guiding portion located on the light-receiving unit is smaller than the diameter of the light-passing conduit of the light guiding portion located on the light transmitting unit.

In some embodiments, the light guiding portion includes a first region through which light passes and a second region that blocks light from passing therethrough, and the first regions are not in communication with each other to form the predetermined region.

In some embodiments, the first region is a via or is formed of a light transmissive material.

In certain embodiments, the second region is formed from a filter material or a light absorbing material.

In some embodiments, a cross-sectional area of the first region of the light guiding portion on the light receiving unit is smaller than a cross-sectional area of the first region of the light guiding portion located on the light transmitting unit.

In some embodiments, the light guiding portion located on the light transmitting unit is disposed obliquely in a desired light transmission direction.

In some embodiments, the second light guiding portion is disposed obliquely toward a side close to the first light guiding portion.

In some embodiments, the second light guiding portion has an inclination angle of 35° to 65°.

In some embodiments, the light guiding element further includes a first light shielding wall disposed between the first light guiding portion and the second light guiding portion.

In some embodiments, the light guiding element further includes a second light shielding wall disposed outside the second light guiding portion.

In some embodiments, the light on the light receiving unit enters a predetermined area, and the light having an incident angle greater than a predetermined angle is totally reflected in the predetermined area.

In some embodiments, the cross-sectional shape of the light-passing conduit is circular, elliptical, triangular, polygonal, or irregular.

In some embodiments, the light pipe of the light guiding portion located on the light receiving unit has a diameter of less than 25 um.

In some embodiments, the light guiding element is used in an optical image sensing module.

An optoelectronic sensing module according to an embodiment of the present invention includes a photosensor device, and a light guiding element of any of the above embodiments disposed on the photosensor device.

An electronic device according to an embodiment of the present invention includes the photoelectric sensor module of any of the above embodiments.

By setting the light guiding element, the photoelectric sensing module has the following points when performing biometric recognition:

(1) When the photoelectric sensing module performs light sensing, the light guiding element is used to block the passage of adjacent light, so that the optical signal received by the light sensing unit under the light guiding element avoids interference of adjacent light, thereby improving the interference. The accuracy and clarity of light collection increases the accuracy of biometrics.

(2) The light guiding component can be separately prepared and then disposed in the photoelectric sensing module, thereby greatly accelerating the preparation process of the photoelectric sensing module.

(3) The light guiding element can not only control the light propagation on the light receiving unit, but also avoid mutual interference between adjacent light rays, and can also control the light propagation on the light transmitting unit, so that the light emitted by the light source follows a preset propagation direction. Both are spread toward the protective cover, thus increasing the intensity of the light signal reaching the protective cover, thereby increasing the clarity of light collection, thereby improving the accuracy of biometric recognition.

The additional aspects and advantages of the embodiments of the invention will be set forth in part in the description in the written description

DRAWINGS

The above and/or additional aspects and advantages of the embodiments of the invention will be apparent from the

1 is a schematic diagram of an optical path of a fingerprint fingerprint recognition module of the present invention for fingerprint recognition;

2 is a schematic cross-sectional structural view of an embodiment of a light guiding device according to an embodiment of the present invention;

3 is a top plan view showing another embodiment of a light guiding device according to an embodiment of the present invention;

4a is a schematic top plan view of still another embodiment of a light guiding device according to an embodiment of the present invention;

4b is a schematic top plan view of still another embodiment of a light guiding device according to an embodiment of the present invention;

5 is a schematic view of an optical path when light rays pass through the light guiding element according to an embodiment of the present invention;

6 is a schematic structural view of an embodiment of a photoelectric sensing module according to an embodiment of the present invention;

7 is a schematic diagram of an optical path in a photoelectric sensing module according to an embodiment of the present invention;

8 is a schematic structural view of another embodiment of a photoelectric sensing module according to an embodiment of the present invention;

9 is a schematic structural view of still another embodiment of a photoelectric sensing module according to an embodiment of the present invention;

10 is a schematic structural view of still another embodiment of the photoelectric sensor module of the present invention;

11 is a schematic plan view of an electronic device according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. . Thus, features defining "first" or "second" may include one or more of the described features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be, for example, a fixed connection or a Disassembling the connection, or connecting integrally; may be mechanical connection, electrical connection or communication with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or mutual interaction of two elements Role relationship. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention can repeat the parameters in different examples. The numbers and/or reference numerals are used for the purpose of simplicity and clarity and do not in themselves indicate the relationship between the various embodiments and/or settings discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the use of other processes and/or the use of other materials.

Further, the described features, structures may be combined in one or more embodiments in any suitable manner. In the following description, numerous specific details are set forth However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details or other structures, components, and the like. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.

An optical sensor module is taken as an example. As shown in FIG. 1 , the photoelectric sensor module includes a bottom plate 101, a light source 102 disposed on the bottom plate 101, and a light sensing unit 103. And a protective cover 104. The light sensing unit 103 is located inside the light source 102 and includes an array structure formed by a plurality of light sensing devices. When the finger 105 is placed on the protective cover 104, after the light emitted by the light source 102 reaches the protective cover 104, since the fingerprint of the finger has two parts of the valley and the ridge, the portion of the light passing through the ridge will be diffusely reflected, and the light passes through the portion of the valley. Specular reflection will occur. The reflected light will be received by the light sensing unit 103, and the received light signal will be converted into a corresponding electrical signal by the light sensing unit 103 and transmitted to the signal processing circuit. Since the reflected signals of the valleys and ridges of the fingerprint are greatly different, that is, the electrical signals output by the light-sensing device that receives the reflected signals of the valleys of the fingerprints are strong, and the electrical signals output by the light-sensing devices that receive the reflected signals of the ridges of the fingerprints are received. It is weak, so the signal processing circuit determines the position of the ridges and valleys of the fingerprint according to the strength of the electrical signal output by each of the light sensing devices in the light sensing unit 103, thereby forming a fingerprint image.

However, since the spacing between the valleys and the ridges of the fingerprint is also very small, and the portion of the ridges of the light passing through the fingerprints is diffusely reflected, the adjacent reflected signals interfere with each other, and the light sensing devices in the light sensing unit 103 actually receive the light. The reflected signal cannot reflect the true reflected signal, resulting in low definition and accuracy of the fingerprint image collected by the optical fingerprint sensor.

In this regard, the present invention provides a light guiding element, which can be applied to a photoelectric sensing module, in particular an optical image recognition module, which will sense image information of a target object. And identifying the identity of the target object based on the sensed image information. The image information may include fingerprint information, palm print information, ear pattern information, and skin texture information at other positions of the human body. Of course, it is not excluded that the light guiding element is applied to other optical recognition technologies to solve the problem of image acquisition using light.

The light guiding element is mainly disposed on the photosensor member to control the transmission of light emitted or received by the photosensor device, for example, removing light outside the predetermined area, so that the light is transmitted in a predetermined area. This allows adjacent light to not interfere with each other, improving the accuracy and clarity of light collection.

Referring to FIG. 2 , a light guiding component 200 according to an embodiment of the present invention includes a light guiding portion 210 disposed on a photosensor device. Each light guiding portion 210 includes a plurality of first regions 211 through which light can pass and a plurality of second regions 212 that block light from passing therethrough. That is, the light enters from one side of the light guiding portion 210, passes through the first region 211, enters the first region 211, is transmitted in the first region 211, and is emitted by the other side of the light guiding portion 210; The area 212 will be blocked by the second area 212, so that the light passing through the second area 212 does not pass or is very weak, and does not substantially affect the light sensing of the light sensing unit 303, so that adjacent light does not interfere with each other. Improve the accuracy and clarity of light collection.

In some examples, the light guiding portion 210 may be integrated. As shown in FIG. 3, the second regions 212 are integrally connected with each other, and define a plurality of first regions 211. Not connected. Thus, the preparation process of the light guiding portion 210 is made simpler, and the structural strength of the light guiding portion 210 is increased. Furthermore, the light guiding portion 210 of the unitary structure is also conveniently disposed on the photosensor member.

Referring to FIG. 4 a and FIG. 4 b , the light guiding portion 210 in this embodiment may include a plurality of light-passing pipes 213 , and the light-passing pipes 213 are formed by bonding, bundling, or the like. The light-passing pipe 213 includes a light path formed by the pipe wall 2131 and the pipe wall 2131, that is, the light-passing hole 2132. The tube walls 2131 of the respective light-passing tubes 213 collectively form a second region 212, and the light-passing holes 2132 of the respective light-passing tubes 213 collectively form a first region 211. The cross-sectional shape of the light-passing hole 2132 may be a circle, an ellipse, a triangle, a polygon, or the like. Since the light guiding portions 210 are formed to be bonded to each other, the gap between the triangular or polygonal light-passing tubes 213 can be achieved, thereby avoiding light from passing between the light-passing tubes 213. The gap passes through. Of course, if the aperture of the light-passing tube 213 is sufficiently small, substantially no gaps can be achieved between the other shapes of the light-passing tubes 213. Alternatively, the gap between the respective light-passing lines 213 may also be filled with a filling material to form a portion of the second region 212.

In order to reduce mutual interference between adjacent rays, the aperture of the above-mentioned light-passing hole 2132 is as small as possible, for example, less than 25 um; and, the wall of the above-mentioned light-passing pipe 213 is as thin as possible, for example, 1-2 um.

The light-passing pipe 213 can be separately prepared and then fixed by bonding, bundling, or the like to form the light guiding portion 210, so that the preparation process of the light guiding portion 210 can be accelerated. Moreover, the light-passing duct 213 can also be realized by an existing structure such as an optical fiber. This simplifies the preparation process and reduces the manufacturing cost.

The transmission of light in the first region 211 adopts the principle of total reflection of light. As shown in FIG. 5, taking the through hole 2132 as an example, after the light enters from one end of the through hole 2132, the vertically entering light L1 will follow the through hole. 2132 is perpendicularly emitted from the other end of the through hole 2132. When the angle θ between the light ray L2 and the normal line M1 perpendicular to the inner tube wall of the through hole 2132 is larger than the critical angle of the through hole 2132, the light occurs in the through hole 2132. Total reflection, after multiple total reflections, is emitted from the other end of the through hole 2132. Due to the transmission of light in the light guiding portion 210, if total reflection occurs, the energy is not Will lose, otherwise the energy will be damaged. In other words, when the incident angle of light entering the light guiding portion 210 (for example, θ shown in FIG. 5) is greater than the critical angle at which the light guiding portion 210 is totally reflected, the light will be in the first region 211 of the light guiding portion 210. Total reflection occurs, that is, the light energy is not lost; when the incident angle of the light entering the light guiding portion 210 is less than or equal to the critical angle at which the light guiding portion 210 is totally reflected, the light cannot be in the first region 211 of the light guiding portion 210. Total reflection occurs inside, that is, the energy of the light is lost. Therefore, when the light guiding portion 210 is applied to the optical path, as long as the critical angle at which the total reflection of the light guiding portion 210 is ensured is greater than the incident angle when the adjacent light enters the first region 211 of the light guiding portion 210, the proximity can be effectively avoided. The light interferes with each other.

With continued reference to FIG. 2 , in other embodiments, the first region 211 of the light guiding portion 210 is formed of a light transmissive material, and the second region 212 is formed of a filter material or a light absorbing material. Since the first region 211 is to ensure the passage of light, the light transmissive material may be selected from materials having a relatively high light transmittance such as glass, PMMA (acrylic), PC (polycarbonate) and the like. The second region 212 needs to block the passage of light, so the second region 212 is selected from a light absorbing material having a better light absorbing effect, such as a black carbon material, a glass fiber cotton or the like. Of course, the second region 212 can also use a filter material to filter most of the light, leaving only a small amount of light. In this way, the small amount of light does not cause too much interference to adjacent light, thereby improving the accuracy of light collection.

In order to avoid mutual interference between adjacent rays and improve the accuracy and clarity of light collection, the cross-sectional area of the first region 211 and the cross-sectional area of the second region 212 are as small as possible, and the cross-sectional area of the first region is Greater than the cross-sectional area of the second region.

The light guiding portion 210 may first form the second region 212, and then fill the light-filled material in the region surrounded by the second region 212 to form the first region 211. Of course, the first region 211 may be formed first, and then the light-absorbing material may be filled in the region surrounded by the first region 211 to form the second region 212. Since the first regions 211 can be formed together, the second regions 212 are formed together, thereby making the preparation process of the light guiding portion 210 simpler.

In other embodiments, the first region 211 may also be a through hole, so that only the second region 212 may be formed, and the region surrounded by the second region 212 forms the first region 211. Of course, it is also possible to first provide a plate of a light absorbing material, and then form a plurality of first regions 211 on the plate by means of a laser or the like.

Referring to FIG. 6 , when the light guiding component having the light guiding portion is applied to the photoelectric sensing module 300 , the photoelectric sensing module 300 may include a bottom plate 301 and a protective cover 302 disposed on the upper and lower sides. There is a light sensing unit 303 and a light source 304. The light sensing unit 303 includes a plurality of light sensing devices which may be formed along the array or may be formed in other arrangements. The light source 304 is disposed outside the light sensing unit 303. The light source 304 can be a self-illuminating structure, such as an organic light emitting diode. If of course, the light source 304 can also be disposed under the bottom plate 301, and the bottom plate 301 is formed of a light transmissive material, or a through hole for the light emitted by the light source 304 is formed on the bottom plate 301. structure. In some examples, the light source 304 is disposed on a side of the bottom plate 303 and directs light from the light source 304 to the protective cover 302 through a light guide plate or a light guide bar. The light emitted from the light source 304 forms the light transmitting region S2; the light emitted from the light source 304 through the protective cover 302 and the light reflected by the finger is received by the light sensing unit 303, and the reflected light forms the light receiving region S1.

The light sensing module 300 is further provided with a light guiding component 400. The light guiding component 400 is disposed above the light sensing unit 303 and the light source 304, that is, under the protective cover 302. The light guiding element 400 includes a first light guiding portion 410 disposed on the light receiving unit, that is, the light sensing unit 303, and a second light guiding portion 420 disposed on the light transmitting unit, that is, the light source 304. The second light guiding portion 420 is correspondingly disposed on the light source 304 for causing the light emitted by the light source 304 to propagate to the protective cover 302 in a predetermined direction. The first light guiding portion 410 is disposed on the light sensing unit 303, so that the light reflected by the protective cover 302 and the finger reaches the light sensing unit 303 accurately, and adjacent light rays do not interfere with each other.

In some embodiments, the surface area of the first light guiding portion 410 is equal to or slightly larger than the surface area of the light sensing unit 303 such that the first light guiding portion 410 completely covers the light sensing unit 303. The surface area of the second light guiding portion 420 is equal to or slightly larger than the surface area of the light source 304 such that the second light guiding portion 420 completely covers the light source 304.

Referring to FIG. 7, when the finger 600 is placed on the protective cover 302, the light emitted by the light source 304 passes through the second light guiding portion 420, and reaches the vertical direction of the cover by the propagation direction of the vertical protective cover 302 or the offset. When the cover plate 302 is protected and passes through the ridges and valley portions of the fingerprint of the finger, the reflected signal passes through the first light guiding portion 410 and is received by the light sensing unit 303. When the light passes through the valley portion of the fingerprint of the finger, since the valley portion is not in contact with the protective cover 302, the light of the portion is totally reflected, and the reflected light passes through the first light guiding portion 410, and is received by the light sensing unit 303. A light sensing device 303a and a light sensing device 303b are received without being disturbed by reflected light from adjacent ridge portions. When the light passes through the ridge portion of the finger print, since the ridge portion is in contact with the protective cover 302, the light of the portion is diffusely reflected, and the reflected light passes through the first light guiding portion 410, because the adjacent light passes through the first guide. In the light portion 410, either the light is blocked by the second region of the first light guiding portion 410, or the light incident is less than or equal to the total reflection of the first light guiding portion 410 when entering the second region of the first light guiding portion 410. The critical angle, so that total reflection cannot occur, and the light will cause energy loss during the propagation in the first region of the first light guiding portion 410, that is, the light intensity after passing through the first light guiding portion 410 is very weak, and substantially no Affects light sensing of light sensing devices. In this way, the accuracy of the light collection is improved by the arrangement of the light guiding element 400, thereby improving the accuracy of fingerprint recognition.

It should be noted that the configuration of the first light guiding portion 410 and the second light guiding portion 420 can be referred to the configuration of the light guiding portion. Alternatively, the second light guiding portion 420 needs to ensure complete light transmission, so in some embodiments, The second light guiding portion 420 may not be provided with any structure or may be provided as a light transmissive material layer.

In addition, in order to ensure that the light sensing unit 303 can sense more light, that is, to ensure that the light emitted by the light source 304 propagates as much as possible to the protective cover 302, the light guiding portion disposed on the light source 304, that is, the second guide In the light portion 420, the diameter of the light-passing pipe may be slightly larger than the diameter of the light-passing pipe of the first light guiding portion 410, that is, greater than 25 um. Similarly, for the other structure of the light guiding portion, the light guiding portion on the light source 304, that is, the second light guiding portion 420, the cross-sectional area of the first region may be larger than that of the first light guiding portion 410. The cross-sectional area of the first region is set slightly larger.

In some embodiments, as shown in FIG. 8, in order to prevent the light of the light source 304 from interfering with the sensing of the light sensing unit 303, the light guiding element 400 is in the light emitting region S2 of the light source 304 and the photosensitive region S1 of the light sensing unit 303. A first light-shielding wall 430 is disposed between the first light guiding portion 410 and the second light guiding portion 420. The light receiving region S1 and the light transmitting region S2 can be effectively isolated by the first light shielding wall 430, thereby preventing the light emitted by the light source 304 from affecting the light sensing of the light sensing unit 303.

Referring to FIG. 9 , since the light source 304 is disposed around the light sensing unit 303 , that is, the light sensing unit 303 is located in the middle, the light source 304 is located outside the light sensing unit 303 , so that the light emitted by the light source 304 passes through the protective cover 302 and the finger 600 . After the reflection, the light sensing unit 303 can be accurately received and absorbed by the light sensing unit 303. Therefore, the second light guiding portion 420 is inclined inwardly, that is, toward the first light guiding portion 410. In some embodiments, the second light guiding portion 420 has an inclination angle β of 35° to 65°. The tilt angle β includes, but is not limited to, determined according to the size of the light sensing unit 303 and the thickness of the protective cover 302 to ensure an optimal light guiding effect. For example, the inclination angle β can be set to 42°, 50°, 56°, 60°, and the like.

However, in other embodiments, the mounting angle of the light source 304 may also be set such that the light emitted by the light source 304 is inclined toward the inside, as shown in FIG. Moreover, an angle formed between the mounting plane of the light source 304 and the mounting plane of the light sensing unit 303 is 25° to 55°. The tilt angle includes, but is not limited to, determined according to the size of the light sensing unit 303 and the thickness of the protective cover 302 to ensure an optimal light guiding effect. For example, the inclination angle β can be set to 30°, 34°, 40°, 48°, and the like.

With continued reference to FIG. 9, in other embodiments, in order to prevent the light of the light source 304 from diverging, the light of the light source 304 is propagated toward the protective cover 302, and the light guiding element 400 further includes a second disposed at the outermost side of the light transmitting region S2. The second light shielding wall 440 is disposed on the outer side of the light shielding wall 440, that is, the second light guiding portion 420. In this way, the light emitted by the light source 304 is transmitted along the second light guiding portion 420 toward the protective cover 302, thereby avoiding light loss, thereby improving the illuminance and increasing the intensity of the light sensing unit 303, thereby improving the light collection. Sharpness.

It should be noted that the configuration of the light guiding element 400 is merely an example of the photosensor module applied in the above embodiment, and the configuration of the light guiding element 400 is not limited. The light guiding element can be applied by corresponding deformation For other configurations of the photoelectric sensor module, for example, the positional relationship, size, and specific structure of the first light guiding portion and the second light guiding portion, etc., are not mentioned here.

Referring to FIG. 11 , an electronic device 500 according to an embodiment of the present invention includes the photoelectric sensor module obtained by the preparation method of any of the above embodiments.

In the electronic device 500, since the photoelectric sensing module is provided with a light guiding element, when the target object is located on the photoelectric sensing module, the light emitted by the light source is reflected back by the protective cover and the finger of the protective photoelectric sensing module. The light passes through the light guiding element and is then collected by the light sensing unit. Moreover, the light guiding element can effectively avoid mutual interference between adjacent light rays, in particular, the reflected light of the diffuse reflection of the light passing through the ridge portion of the finger interferes with the adjacent light, so the electron of the photoelectric sensing module is used. When the device performs image acquisition, the image accuracy of the target object is improved.

Specifically, the electronic device 500 is, for example, a consumer electronic product or a home-based electronic product or a vehicle-mounted electronic product. Among them, consumer electronic products such as mobile phones, tablets, notebook computers, desktop monitors, computer integrated machines and other electronic products using biometric identification technology. Home-based electronic products such as smart door locks, televisions, refrigerators, wearable devices and other electronic products that use biometric technology. Vehicle-mounted electronic products such as car navigation systems, car DVDs, etc.

In the example of FIG. 11 , the electronic device 500 is a mobile phone. The front surface of the mobile phone is provided with a touch screen and a display device 400 . The photoelectric sensor module is disposed under the front cover of the electronic device 500 . In an example, when the biometric information to be collected is the fingerprint information, when the fingerprint information is collected, the target object 200 is a finger, and the finger is placed on the electronic device 500, so that the touch screen can determine the finger in the photoelectric sensing module 100. The upper sensing area, the photoelectric sensing module 100 performs subsequent fingerprint information collection.

However, in other embodiments, the photoelectric sensor module 100 can also be disposed on the touch screen and the display device 400. In addition, the image capturing portion of the photoelectric sensor module 100 can also be integrated into a biometric chip, correspondingly disposed at a suitable position on the front, the back, and the side of the electronic device 500, and can be exposed to the outside of the electronic device 500. The surface may also be disposed inside the electronic device 500 and adjacent to the outer casing.

It should be noted that the above examples are examples for facilitating the understanding of the embodiments of the present invention and are not to be construed as limiting the scope of the present invention.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. The specific features, structures, materials or characteristics described in the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. And, description Specific features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

While the embodiments of the present invention have been shown and described above, it is understood that the foregoing embodiments are illustrative and are not to be construed as limiting the scope of the invention Variations, modifications, substitutions and variations of the embodiments described above are possible.

Claims (20)

A light guiding element comprising a light guiding portion disposed on a photosensor member for removing light outside a predetermined area to transmit light in the predetermined area. The light guiding member according to claim 1, wherein the photosensor member includes a light receiving unit, and the light guiding portion includes a first light guiding portion, and the first light guiding portion is disposed at the light On the receiving unit. The light guiding member according to claim 2, wherein the photosensor member further comprises a light transmitting unit, the light guiding portion further includes a second light guiding portion, and the second light guiding portion is disposed at the On the light transmitting unit. The light guiding member according to claim 2 or 3, wherein the light guiding portion includes a plurality of light-passing pipes, and the pipe walls of the plurality of light-passing pipes are fitted to each other to form the predetermined region. The light guiding element according to claim 4, wherein a diameter of a light-passing pipe of the light guiding portion on the light receiving unit is smaller than a light-passing pipe of the light guiding portion of the light transmitting unit Pipe diameter. The light guiding member according to claim 2 or 3, wherein the light guiding portion includes a first region through which light passes and a second region that blocks light from passing therethrough, and between the first regions They are not connected to each other to form the predetermined area. The light guiding member according to claim 6, wherein the first region is a through hole or is formed of a light transmissive material. The light guiding member according to claim 6, wherein the second region is formed of a filter material or a light absorbing material. The light guiding element according to claim 6, wherein a cross-sectional area of the first region in the light guiding portion on the light receiving unit is larger than a first region in the light guiding portion on the light transmitting unit The cross-sectional area is small. The light guiding element according to claim 3, wherein the light guiding portion located on the light transmitting unit is obliquely disposed in a desired light transmission direction. The light guiding element according to claim 10, wherein the second light guiding portion is obliquely disposed toward a side close to the first light guiding portion. The light guiding element according to claim 11, wherein the second light guiding portion has an inclination angle of 35 to 65. The light guiding element according to claim 3, wherein the light guiding element further comprises a first light shielding wall disposed between the first light guiding portion and the second light guiding portion. The light guiding member according to claim 3 or 13, wherein said light guiding member further comprises setting a second light shielding wall outside the second light guiding portion. The light guiding element according to claim 1, wherein the light on the light receiving unit enters a predetermined area, and the light having an incident angle greater than a predetermined angle is totally reflected in the predetermined area. The light guiding member according to claim 4, wherein the cross-sectional shape of the light-passing duct is a circle, an ellipse, a triangular row, a polygon, or an irregular shape. The light guiding member according to claim 4, wherein a diameter of the light-passing conduit of the light guiding portion on the light receiving unit is less than 25 μm. The light guiding element according to claim 1, wherein said light guiding element is used in an optical image sensing module. An optoelectronic sensing module comprising a photosensor device and a light guiding element according to any one of claims 1-18 disposed on the photosensor device. An electronic device comprising the photoelectric sensor module of claim 19.

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