CN210570528U

CN210570528U - Depth detection system, bracket thereof and electronic device

Info

Publication number: CN210570528U
Application number: CN201921543845.XU
Authority: CN
Inventors: 田浦延; 王小明
Original assignee: Liuzhou Fumin Technology Co ltd
Current assignee: Liuzhou Fumin Technology Co ltd
Priority date: 2019-03-23
Filing date: 2019-09-17
Publication date: 2020-05-19
Anticipated expiration: 2029-09-17
Also published as: CN211060850U

Abstract

The utility model discloses a depth detection system, which comprises a transmitting module used for transmitting a detection light beam with a reference pattern; the receiving module is used for collecting a detection light beam with a detection pattern reflected by an external object; the straight line where the edge of the transmitting module and/or the receiving module is located has a certain angle relative to the straight line where the base line of the transmitting module and the receiving module is located; or the straight line where the edge of the transmitting module is located and the straight line where the edge of the receiving module is located have a certain angle. The utility model also discloses a be used for degree of depth detecting system's support with include degree of depth detecting system's electron device. The utility model discloses great degree of depth information detection scope has.

Description

Depth detection system, bracket thereof and electronic device

Technical Field

The utility model relates to the field of photoelectric technology, especially, relate to a degree of depth detecting system and support and electron device thereof.

Background

With the technical progress and the improvement of living standard of people, users demand more functions and fashionable appearance for electronic products such as mobile phones, tablet computers, cameras and the like. At present, the development trend of mobile phones is that the mobile phones are light, thin and close to a full screen, and have functions of a front camera or face recognition and the like. The traditional face recognition technology is based on two-dimensional image comparison and is easy to crack by photos. Therefore, Three-dimensional (3D) face recognition technology with more security and various 3D biometric detection and recognition based on the same are the development trend of future electronic products. Structured light (structured light) refers to a light beam with a specific pattern, which can be designed as a light field of stripe patterns, regular dot patterns, grid patterns, speckle patterns, coded patterns, etc., even more complex patterns. At present, structured light is widely applied to a depth detection system and used for realizing three-dimensional image drawing or biological characteristic detection, such as identity recognition, a projector, three-dimensional contour reproduction, depth measurement, anti-counterfeiting identification and the like. However, when the depth detection in the prior art is used for a portable electronic device such as a mobile phone, the depth range capable of being accurately measured is small.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a degree of depth detecting system, support and electron device for solving prior art problem.

One aspect of the utility model discloses a depth detection system, which comprises a transmitting module, a detecting module and a detecting module, wherein the transmitting module is used for transmitting a detecting light beam with a reference pattern; the receiving module is used for collecting a detection light beam with a detection pattern reflected by an external object; the straight line where the edge of the transmitting module and/or the receiving module is located has a certain angle relative to the straight line where the base line of the transmitting module and the receiving module is located; or the straight line where the edge of the transmitting module is located and the straight line where the edge of the receiving module is located have a certain angle.

Optionally, the emission module has the light emitting area towards outside projection space, the emission module have with light emitting area vertically transmission axis, the receiving module has the photosurface towards outside projection space, the receiving module have with photosurface vertically photoshaft, the light emitting area with the photosurface is parallel to each other, perhaps the light emitting area with the photosurface is located the coplanar.

Optionally, an angle formed by a straight line where the edge of the light emitting surface of the transmitting module and/or the edge of the light sensing surface of the receiving module is located or a parallel line of the straight line relative to the straight line where the base line is located is greater than 0 degree and less than or equal to 45 degrees.

Optionally, an angle between a straight line where an edge of a light emitting surface of the transmitting module is located and a straight line where an edge of a light sensing surface of the receiving module is located is greater than 0 degree and less than or equal to 45 degrees.

Optionally, the installation positions of the transmitting module and the receiving module are such that the detection pattern has an angle with respect to the base line.

Optionally, the emission module includes a light emitting array and a diffractive optical element disposed above the light emitting array, the light emitting array is configured to emit a detection light beam with a reference pattern, and the diffractive optical element is configured to split, copy, and project the detection light beam emitted by the light emitting array into a space.

Optionally, the emission module projects a detection beam with a reference pattern to an external projection area, and the receiving module receives the detection beam with the detection pattern in a photosensitive area, where the photosensitive area is a part of the projection area.

Optionally, the reference pattern includes a plurality of identical sub-reference patterns having rectangular edges, and a detection length of the sub-reference pattern is greater than a width of the sub-reference pattern.

An aspect of the utility model discloses a support, it is used for foretell degree of depth detecting system, the support is including the main part that has the cuboid shape, a surface of main part has inside sunken first groove and the second of accomodating and accomodates the groove, first groove of accomodating is used for accomodating degree of depth detecting system's transmission module, the second is accomodate the groove and is used for accomodating degree of depth detecting system's receiving module, first groove and the second of accomodating has the rectangle opening, first rectangle edge place sharp of accomodating the groove with the second rectangle edge place sharp of accomodating the groove has the angle that is greater than 0 degree and is less than or equal to 45 degrees.

One aspect of the present invention discloses an electronic device, which includes the above depth detection system or the bracket.

Compared with the prior art, the utility model discloses degree of depth detecting system's transmission module and/or receiving module's edge or its place sharp with certain angle has between the baseline, perhaps the edge place sharp of transmission module edge place sharp and receiving module has certain angle, thereby makes degree of depth detecting system has great can the precision measurement the degree of depth scope. The utility model discloses the support can be used for above-mentioned degree of depth detecting system, the utility model discloses electron device includes above-mentioned degree of depth detecting system. Therefore the utility model discloses degree of depth detecting system and support and electron device thereof have the accurate detection scope of great degree of depth information.

Drawings

Fig. 1 is a schematic view of an embodiment of the present invention;

FIG. 2 is a partial schematic view of the embodiment shown in FIG. 1;

FIG. 3 is a partial schematic view of the embodiment shown in FIG. 1;

fig. 4 is a schematic diagram of an embodiment of the present invention;

fig. 5 is a schematic view of an embodiment of the present invention;

FIG. 6 is a partial schematic view of the embodiment shown in FIG. 1;

fig. 7 is a schematic view of an embodiment of the present invention;

fig. 8 is a schematic view of an embodiment of the present invention;

fig. 9 is a schematic view of an embodiment of the present invention;

fig. 10 is a schematic diagram of an embodiment of the present invention.

Detailed Description

In the detailed description of the embodiments of the present invention, it is to be understood that when a substrate, a frame, a sheet, a layer, or a pattern is referred to as being "on" or "under" another substrate, another frame, another sheet, another layer, or another pattern, it can be "directly" or "indirectly" on the other substrate, the other frame, the other sheet, the other layer, or the other pattern, or one or more intervening layers may also be present. The thickness and size of each layer in the drawings of the specification may be exaggerated, omitted, or schematically represented for clarity. Further, the sizes of the elements in the drawings do not completely reflect actual sizes.

An embodiment of the present invention provides a depth detection system, which includes a transmitting module for transmitting a detection beam having a reference pattern; the receiving module is used for collecting a detection light beam with a detection pattern reflected by an external object; the straight line where the edge of the transmitting module and/or the receiving module is located has a certain angle relative to the straight line where the base line of the transmitting module and the receiving module is located; or the straight line where the edge of the transmitting module is located and the straight line where the edge of the receiving module is located have a certain angle.

The transmitting module has the light emitting surface towards outside projection space, the transmitting module have with light emitting surface vertically transmission axis, the receiving module has the photosurface towards outside projection space, the receiving module have with photosurface vertically photosensing axis, the light emitting surface with the photosurface is parallel to each other, perhaps the light emitting surface with the photosurface is located the coplanar.

The straight line where the edge of the light-emitting surface of the transmitting module and/or the light-sensitive surface of the receiving module is located or the parallel line of the straight line has an angle which is larger than 0 degree and smaller than or equal to 45 degrees relative to the straight line where the base line is located. The angle between the straight line of the edge of the light emitting surface of the transmitting module and the straight line of the edge of the light sensing surface of the receiving module is greater than 0 degree and less than or equal to 45 degrees. Also, the detection pattern is at an angle relative to the baseline. The angle of the detection pattern relative to the base line is greater than 0 degrees and less than or equal to 45 degrees.

The emission module comprises a light emitting array and a diffractive optical element arranged above the light emitting array, the light emitting array is used for emitting a detection light beam with a reference pattern, and the diffractive optical element is used for splitting the detection light beam emitted by the light emitting array, copying the detection light beam and projecting the detection light beam into space. The light emitting array includes a plurality of light emitting elements arranged to form a regular or irregular two-dimensional pattern, the light emitting elements being light emitting diodes or vertical cavity surface emitting lasers. The transmitting module projects a detection light beam with a reference pattern to an external projection area, the receiving module receives the detection light beam with the detection pattern in a photosensitive area, and the photosensitive area is a part of the projection area. The reference pattern includes a plurality of identical sub-reference patterns having rectangular edges, and a detection length of the sub-reference patterns is greater than a width of the sub-reference patterns.

The utility model discloses other embodiments still provide a support, it can be used for foretell degree of depth detecting system, the support is including the main part that has the cuboid shape, a surface of main part has the first groove and the second of accomodating of inside sunken, the first groove of accomodating is used for accomodating degree of depth detecting system's emission module, the groove is used for accomodating to shown second the receiving module of degree of depth detecting system, the groove is accomodate to shown first accomodating and the second has the rectangle opening, the first rectangle edge place sharp of accomodating the groove with the second rectangle edge place sharp of accomodating the groove has the angle that is greater than 0 degree and is less than or equal to 45 degrees.

Other embodiments of the present invention further provide an electronic device including the above depth detection system or the bracket.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, in an embodiment of the present invention, a depth detection system 10 includes a transmitter module 11 and a receiver module 12. The transmitting module 11 and the receiving module 12 are disposed adjacent to or spaced apart from each other. The connecting line between the transmitting module 11 and the receiving module 12 is a baseline 101. The emission module 11 includes a light emitting array 111 and a Diffractive Optical Element (DOE)112 disposed above the light emitting array. The light emitting array 111 is configured to emit a patterned detection beam having a reference pattern under the driving of a driving circuit (not shown) of the depth detection system 10, and the diffractive optical element 112 is configured to split, copy and project the patterned detection beam emitted by the light emitting array 111 into a space.

In this embodiment or the modified embodiment, the light emitting array 111 may include a plurality of light emitting elements (not shown), and the arrangement of the plurality of light emitting elements forms a regular or irregular two-dimensional pattern. The Light Emitting element may be a Light Emitting Diode (LED), a Vertical Cavity Surface Emitting Laser (VCSEL), or other Laser emitter. The light emitting array 111 can be used to emit visible or invisible light, such as infrared light.

In this embodiment or the modified embodiment, the receiving module 12 may include an image sensor, such as but not limited to a visible light image sensor or an infrared light image sensor.

The diffractive optical element 112 of the emission module 11 has a light-emitting surface 113 facing the exterior projection space, and the emission module 11 has an emission axis 114 perpendicular to the light-emitting surface 113. The receiving module 12 has a photosensitive surface 123 facing the external projection space, and the receiving module 12 has a photosensitive axis 124 perpendicular to the photosensitive surface 123. The light emitting surface 113 and the light sensing surface 123 are parallel or approximately parallel to each other, or the light emitting surface 113 and the light sensing surface 123 are located on the same plane. In this embodiment, the light emitting surface 113 and the light sensing surface 123 can be regarded as being located in the same spatial plane.

The emitting shaft 114 is substantially a central axis of the emitting surface 113 or the emitting module 11, and the emitting surface 113 is centrosymmetric with respect to the emitting shaft 114. The photosensitive axis 124 is substantially a central axis of the photosensitive surface 123 or the receiving module 12, and the photosensitive surface 123 is symmetric with respect to the photosensitive axis 124. The base line 101 between the transmitting module 11 and the receiving module 12 may be a connection line between the transmitting axis 114 and the photosensitive axis 124, which is parallel to the light emitting surface 113 and the photosensitive surface 123. The base line 101 is perpendicular to the emission axis 114 and the light sensing axis 124.

The light emitting surface 113 is substantially rectangular, the light sensing surface 123 is substantially rectangular, and an angle 110 is formed between a straight line where the edge of the light emitting surface 113 is located or a parallel line thereof and a straight line where the base line 101 is located. In this embodiment, the angle 110 is greater than 0 degree and less than or equal to 15 degrees. In a modified embodiment, the angle 110 is greater than 0 degrees and less than 45 degrees.

In this embodiment or the modified embodiment, the angle 110 is caused by the installation positions of the transmitting module 11 and the receiving module 12. The angle 110 may be formed by intentionally rotating the emission axis 114 or the photosensitive axis 124 by a certain angle during installation, or may be formed by indicating a bracket having a receiving groove with a specific shape and angle to form an installation position satisfying the angle 110.

The emission module 11 projects the detection beam having the reference pattern to the external projection area 1000. The receiving module 12 receives the detecting beam with the detecting pattern in the photosensitive area 1010. The projection area 1000 includes the photosensitive area 1010, and the photosensitive area 1010 is a portion of the projection area 1000.

The projection area 1000 corresponds to the shape of the light emitting surface 113, so that the projection area 1000 is substantially rectangular and has a straight edge. The shape of the photosensitive area 1010 corresponds to that of the photosensitive surface 123, so that the photosensitive area 1010 is substantially rectangular and has straight edges. The projection area 1000 and the edge of the photosensitive area 1010 correspond to each other with an angle 110 therebetween.

Please refer to fig. 3, which is a partial schematic view of the projection area 1000 shown in fig. 1. The projection area 1000 shown in fig. 3 includes a plurality of sub-reference patterns 1001, and the plurality of sub-reference patterns 1001 are arranged in a grid. The rectangular edges of the sub-reference pattern 1001 have the same angle 110 as the base line 101. In this embodiment, the sub-reference patterns 1001 are arranged in an 11 × 11 grid array.

The sensing pattern includes a plurality of sub-sensing patterns corresponding to the sub-reference pattern 1001. The detection beam having the detection pattern received by the receiving module 12 can generate a detection image corresponding to the detection pattern, the detection image including a plurality of sub-detection images corresponding to the sub-detection patterns.

It should be noted that the reference pattern described in this specification is a pattern corresponding to the detection beam emitted by the diffractive optical element 112 from the projection module 11, and the sub-reference pattern 1001 has a two-dimensional pattern corresponding to the arrangement of the light emitting elements of the light emitting array 111. The detection pattern is a pattern of the detection beam emitted by the emission module 11 after being reflected by the external object, and the detection pattern can be regarded as a pattern that the reflected detection beam is shifted because the external object has depth information when the detection beam with the reference pattern is reflected by the external object, so that the pattern is called as the detection pattern. The detection beam with the detection pattern can be received or collected by the receiving module 12, and generate a corresponding detection image, which may include a detection point formed by a plurality of light emitting elements emitting light. In the above or modified embodiment of the present invention, the light beam with the detection pattern may reflect the detection light beam with the reference pattern formed by the detection light beam with the reference pattern for the external object in the projection area 1000.

The projection area 1000 shown in fig. 3 is only illustrative and should not be construed as limiting the shape, arrangement, size, etc. of the projection area 1000. In fact, when the emission module 11 projects the light beam to the space, pincushion distortion caused by optical elements is generally generated, and the sub-reference pattern 1001 and the reference pattern in the projection area 1000 have a corresponding distorted rectangular shape.

In this embodiment or a modified embodiment, the detection Light beam is Structured Light (Structured Light), and optionally, the detection Light beam is speckle Structured Light or coded Structured Light.

Please refer to fig. 4, which is a schematic diagram of the optical principle of depth information detection of the depth detection system 10. As shown in fig. 4, the depth detection system 10 is shown to detect depth information of an external object using triangulation principles. According to the principle of triangulation:

1) the existence of triangle △ abc is similar to triangle △ dec, i.e., △ abc- △ dec, de-X, and results in:

2) presence of △ deg- △ chg, so that:

eliminating X from the formula (1) and the formula (2) can obtain a formula (3):

3)

where Δ u represents the magnitude of the shift between the detected image and the reference image, and Z represents the magnitude of the depth. From equation (3), the depth information of the external object is associated with the detected offset. Further, as the numerical range of the magnitude of the offset represented by Δ u is larger, the range of the depth corresponding to Z that can be detected is larger. This allows the depth detection system 10 to measure a wide range of depth information, with a wide range of offset between the detected image and the reference image.

Referring to fig. 5, when the depth detection system 10 detects depth information, the depth detection system 10 first captures a part of the reference image as a detection block (for example, but not limited to, a 3 pixel by 3 pixel detection block, or a 5 pixel by 5 pixel detection block, etc.), and then traverses and compares the detection block and the reference image in each sub-detection image of the received detection image along the direction of the baseline 101 (i.e., the direction of the detection length L in fig. 4), so as to obtain an offset between the detection image and the reference image, thereby obtaining the depth information of the external object. In this embodiment, the detection block may be a square area with a size of 5 pixels by 5 pixels in the reference image. The detection block comprises a plurality of detection points, and the local lateral deviation of the sub-detection image relative to the reference image is detected at each detection point through a depth detection chip connected with the receiving module 12, so that the depth coordinate or the depth information at the corresponding detection point can be obtained through triangulation.

Since the sub-reference patterns in the reference pattern are not internally correlated, adjacent sub-reference patterns are typically highly correlated. When the depth information of the external object corresponds to a lateral shift greater than or equal to the lateral spacing between the sub-reference patterns (here, the lateral direction is along the baseline 101), the detection of the depth information may be erroneous or blurred. For example, when the corresponding lateral shift of the external object depth spans two adjacent sub-reference patterns, the depth detection system 10 cannot determine whether the lateral shift spans two adjacent sub-detection patterns or belongs to a single sub-detection pattern in the corresponding sub-detection pattern.

Please refer to fig. 6, which is a diagram illustrating the sub-reference pattern 1001 shown in fig. 3. The sub-reference pattern 1001 has rectangular edges and includes a plurality of light spots 1002 corresponding to a two-dimensional pattern of light emitting element arrangements. The light spots 1002 correspond one-to-one to the light emitting elements on the light emitting array 111.

For the depth detection system 10, the detection image may be obtained by performing photoelectric conversion on the detection beam having the detection pattern received by the receiving module 12, and the reference image may be a pre-stored image for comparison with the detection image. For example, but not limited to, the reference image includes a pattern identical to or corresponding to the sub-reference pattern 1001, where the same means that the positions, the pitches, and the numbers of the detected points in the reference image and the light spots 1002 in the sub-reference pattern 1001 are the same; the correspondence means that at least one of the position, the pitch and the number of the detected points in the reference image and the light spots 1002 in the sub-reference pattern 1001 are different.

Alternatively, in some embodiments, the spots 1002 are randomly distributed within the rectangular sub-reference pattern 1001, thereby forming a sub-reference pattern 1001 with a high degree of irrelevancy. The term "high irrelevancy" as used herein refers to the fact that when a reference image corresponding to the sub-reference pattern 1001 is detected by a detection block in a traversal manner, an area having the same image as the detection block or an area having the light spot 1002 coincident with the detection point of the detection block cannot be obtained.

Optionally, in some embodiments, a straight line on which the edge of the light emitting surface 113 of the emission module 11 is located has an angle 110 with respect to a straight line on which the base line 101 is located, so that the edge of the sub-reference pattern 1001 has an angle 110 with respect to the base line 101 in the projection space. The straight line of the edge of the photosensitive surface 123 of the receiving module 12 is parallel to the straight line of the base line 101, so that the detection patterns received by the receiving module 12 have the same angle 110 with respect to the base line 101. Assuming that the horizontal direction in fig. 4 is along the base line 101, the sub-reference pattern 1001 has a rectangular edge with a width H and a length V, and the detection length of the sub-reference pattern 1001 along the base line 101 is L. Obviously, the detection length L is greater than the width H of the sub-reference pattern 1001.

Therefore, since the sub-reference pattern 1001 of the depth detection system 10 and the base line 101 are at an angle 110, the detection length L along the base line 101 is greater than the width H of the sub-reference pattern 1001, and also greater than the width of the sub-detection pattern. Therefore, the sub-detection image corresponding to the single sub-detection pattern can have a larger measurement space with lateral offset, so that the depth information of the external object can be accurately acquired in a larger range.

In the above or modified embodiment of the present invention, the detection beam having the detection pattern received by the receiving module 12 can be used for detecting and identifying the biological characteristics of the external object, such as but not limited to fingerprint detection and identification, face detection and identification, iris detection and identification, and the like.

In the above or modified embodiment of the present invention, the detection beam having the detection pattern received by the receiving module 12 can be used for drawing a two-dimensional and/or three-dimensional graph of an external object. In a further embodiment, the depth detection system further includes a depth detection chip, and the depth detection chip can generate a corresponding detection image according to the detection light beam with the detection pattern collected by the receiving module 12, and obtain the depth information of the external object by comparing the detection pattern with a pre-stored reference pattern.

In the above or modified embodiment of the present invention, the transmitting module 11 and the receiving module 12 may be separate chip units respectively, or may be integrated in one chip unit, and the transmitting module 11 and the receiving module 12 in fig. 1 and fig. 2 are only schematically shown, and do not represent any limitation of the shape, structure and position relationship between the transmitting module 11 and the receiving module 12.

In the embodiment and the modified embodiment of the present invention, the detection beam emitted by the emitting module 11 can be reflected by an external object (for example, a finger or a face) and then received by the receiving module 12.

Referring to fig. 7, in a modified embodiment of the present invention, a depth detection system 70 includes a transmitter module 71 and a receiver module 72. The transmitting module 71 and the receiving module 72 are disposed adjacent to or spaced apart from each other. The line between the transmitting module 71 and the receiving module 72 is defined as a baseline 701. The emission module 71 has an emission surface 713 facing the external projection space, and the emission module 71 has an emission axis 714 perpendicular to the emission surface 713. The receiving module 72 has a light-sensing surface 723 facing the external projection space, and the receiving module 72 has a light-sensing axis 724 perpendicular to the light-sensing surface 723. The light emitting surface 713 and the light sensing surface 723 are parallel or substantially parallel to each other, or the light emitting surface 713 and the light sensing surface 723 are located on the same plane. In this embodiment, the light emitting surface 713 and the light sensing surface 723 may be regarded as being located in the same spatial plane.

The emitting axis 714 is substantially a central axis of the emitting surface 713 or the emitting module 71, and the emitting surface 713 is centrosymmetric with respect to the emitting axis 714. The photosensitive axis 724 is substantially a central axis of the photosensitive surface 723 or the receiving module 72, and the photosensitive surface 723 is centrosymmetric with respect to the photosensitive axis 724. The base line 701 between the emitting module 71 and the receiving module 72 may be a connecting line between the emitting axis 714 and the photosensitive axis 724, which is parallel to the light emitting surface 713 and the photosensitive surface 723. The base line 701 is perpendicular to the emitting axis 714 and the sensing axis 724.

The light emitting surface 713 is provided with a rectangular edge approximately, the light sensing surface 723 is provided with a rectangular edge approximately, and an angle 720 is formed between a straight line where the rectangular edge of the light sensing surface 723 is located or a parallel line of the rectangular edge and the base line 701. In this embodiment, the angle 720 is greater than 0 degree and less than or equal to 15 degrees. In a modified embodiment, the angle 720 is greater than 0 degrees and less than 45 degrees.

Referring to fig. 8, in a modified embodiment of the present invention, a depth detection system 80 includes a transmitter module 81 and a receiver module 82. The transmitting module 81 and the receiving module 82 are disposed adjacent to or spaced apart from each other. The line between the transmitting module 81 and the receiving module 82 is defined as a baseline 801. The transmitting module 81 has a light emitting surface 813 facing the external projection space, and the transmitting module 81 has a transmitting shaft 814 perpendicular to the light emitting surface 813. The receiving module 82 has a photosensitive surface 823 facing the external projection space, and the receiving module 82 has a photosensitive axis 824 perpendicular to the photosensitive surface 823. The light emitting surface 813 and the light sensing surface 823 are parallel or approximately parallel to each other, or the light emitting surface 813 and the light sensing surface 823 are located on the same plane. In this embodiment, the light emitting surface 813 and the light sensing surface 823 can be regarded as being located in the same spatial plane.

The emitting axis 814 is substantially a central axis of the emitting surface 813 or the emitting module 81, and the emitting surface 813 is centrosymmetric with respect to the emitting axis 814. The photosensitive axis 824 is substantially a central axis of the photosensitive surface 823 or the receiving module 82, and the photosensitive surface 823 is centrosymmetric with respect to the photosensitive axis 824. The base line 801 between the emitting module 81 and the receiving module 82 may be a connecting line between the emitting axis 814 and the photosensitive axis 824, which is parallel to the emitting surface 813 and the photosensitive surface 823. The baseline 801 is perpendicular to the emission axis 814 and the sensing axis 824.

The light emitting surface 813 is approximately provided with a rectangular edge, the light sensing surface 823 is approximately provided with a rectangular edge, an angle 810 is formed between a straight line where the rectangular edge of the light emitting surface 813 is located or a parallel line of the rectangular edge of the light emitting surface 813 and a straight line where the base line 801 is located, and an angle 820 is formed between a straight line where the rectangular edge of the light sensing surface 823 is located or a parallel line of the rectangular edge of the light sensing surface 823 and a straight line. The straight line of the rectangular edge of the light emitting surface 813 and the straight line of the rectangular edge of the light sensing surface 823 are not parallel. In this embodiment, the

angles

810 and 820 are greater than 0 degree and less than or equal to 15 degrees. In a modified embodiment, the

angles

810 and 820 are greater than 0 degree and less than 45 degrees.

Referring to fig. 9, in a modified embodiment of the present invention, a depth detection system 90 includes a transmitter module 91 and a receiver module 92. The transmitting module 91 and the receiving module 92 are disposed adjacent to or spaced apart from each other. A connecting line between the transmitting module 91 and the receiving module 92 is defined as a baseline 901. The emission module 91 has an emission surface 913 facing the external projection space, and the emission module 91 has an emission axis 914 perpendicular to the emission surface 913. The receiving module 92 has a photosensitive surface 923 facing to the external projection space, and the receiving module 92 has a photosensitive axis 924 perpendicular to the photosensitive surface 923. The light emitting surface 913 and the light sensing surface 923 are parallel to each other or substantially parallel to each other, or the light emitting surface 913 and the light sensing surface 923 are located on the same plane. In this embodiment, the light emitting surface 913 and the light sensing surface 923 may be regarded as being located in the same spatial plane.

The emission axis 914 is substantially a central axis of the light-emitting surface 913 or the emission module 91, and the light-emitting surface 913 is centrosymmetric with respect to the emission axis 914. The photosensitive axis 924 is substantially the photosensitive surface 923 or the central axis of the receiving module 92, and the photosensitive surface 923 is centrosymmetric with respect to the photosensitive axis 924. The baseline 901 between the emitting module 91 and the receiving module 92 may be a connecting line between the emitting axis 914 and the photosensitive axis 924, which is parallel to the emitting surface 913 and the photosensitive surface 923. The baseline 901 is perpendicular to the emission axis 914 and the photosensitive axis 924. The light emitting surface 913 generally has a rectangular edge, the photosurface 923 generally has a rectangular edge, and an angle 930 is provided between a straight line or parallel lines at the rectangular edge of the light emitting surface 913 and a straight line or parallel lines at the rectangular edge of the photosurface 923. The angle 930 may range from greater than 0 degrees to 45 degrees or less.

Referring to fig. 10, which is a schematic view of an embodiment of a bracket for a depth detection system according to the present invention, the bracket 30 includes a main body 33, and the main body 33 has a substantially rectangular parallelepiped shape. One surface of the body 33 has a first receiving groove 31 and a second receiving groove 32 which are depressed inward. The first receiving slot 31 can be used for receiving the transmitting module 11 shown in fig. 1, and the second receiving slot 32 can be used for receiving the receiving module 12 shown in fig. 1. The first receiving groove 31 and the second receiving groove 32 are shown to have rectangular openings, and a straight line where the rectangular edge of the first receiving groove 31 is located and a straight line where the rectangular edge of the second receiving groove 32 is located have an angle 310. The angle 310 may be an angle greater than 0 degrees and less than or equal to 45 degrees.

In an alternative embodiment, the first receiving groove 31 and the second receiving groove 32 of the bracket 30 may be fixed with the transmitting module 11 and the receiving module 12 by glue.

In alternate embodiments, the holder 30 may also be used with the

depth detection systems

70, 80, 90 described in the previous embodiments or in other alternate embodiments.

The

depth detection system

10, 70, 80, 90 can acquire two-dimensional image information or biometric information of an external object by collecting a detection beam reflected by the external object. The

depth detection system

10, 70, 80, 90 may further comprise a processor (not shown) capable of calculating a shift of the received detection beam with respect to the reference image to obtain depth information of the external object. Further, the processor also stores the biological feature information data in advance, and the processor can realize the biological feature detection and identification of the external object by comparing the obtained two-dimensional information and/or depth information of the external object with the biological feature information data stored in advance, such as but not limited to: fingerprint recognition, face recognition, iris recognition, and the like.

By detecting and identifying the biological characteristics of the external object, the

depth detection system

70, 80, 90 can be applied to various products and application scenes such as locking or unlocking of an electronic device (such as a mobile phone), online payment service verification, identity verification of a financial system or a public security system, passage verification of an access control system and the like.

In the above embodiment or modified embodiment of the present invention, the detection light beam is invisible light, and preferably infrared light with a wavelength range of 850-1000 nanometers (nm).

In other or modified embodiments of the present invention, the detection beam may be one or more of visible light, invisible light, ultraviolet light, infrared light, ultrasonic wave, and electromagnetic wave.

The utility model discloses in other or the change embodiment, the detection light beam can be floodlight, speckle structure light, and one or more in the coded structure light, the modulation pulse signal.

In the embodiment or the modified embodiment, the number of the transmitting

module

11, 71, 81, 91 may be one or more, the number of the receiving

module

12, 72, 82, 92 may be one or more, the transmitting module and the receiving module may be used to draw a two-dimensional and/or three-dimensional image of an external object based on Time of Flight (TOF), Structured Light (Structured Light), Binocular Stereo Vision (Binocular Stereo Vision) and other technologies, or to collect and identify two-dimensional and/or three-dimensional biometric information of the external object, such as fingerprint identification or face identification.

In the embodiment or the modified embodiment of the present invention, the Emitting

module

11, 71, 81, 91 may include a Vertical Cavity Surface Emitting Laser (VCSEL), or a Light Emitting Diode (LED), or other types of light Emitting chips. The receiving

module

12, 72, 82, 92 may include an infrared image sensor capable of receiving infrared light beams and converting the infrared light beams into corresponding electrical signals. In other or modified embodiments, the receiving

single module

12, 72, 82, 92 may further include a visible light image sensor, or other types of photoelectric conversion chips.

The utility model also provides an electronic device, including foretell degree of

depth detecting system

10, 70, 80, 90 or its change embodiment, electronic device can be the cell-phone, panel computer, intelligent wrist-watch, augmented reality/virtual reality device, human action detection device, the autopilot car, intelligent household equipment, security protection equipment, intelligent robot or other have the electronic device that can be used for object biological characteristic to detect and discern.

It should be noted that, those skilled in the art can understand that, without creative efforts, some or all of the embodiments of the present invention, and some or all of the deformation, replacement, alteration, split, combination, extension, etc. of the embodiments should be considered as covered by the inventive idea of the present invention, and belong to the protection scope of the present invention.

Any reference in this specification to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature or structure is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature or structure in connection with other ones of the embodiments.

The references to "length", "width", "upper", "lower", "front", "rear", "back", "front", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. as used herein are intended to refer to the orientation or positional relationship shown in the drawings, and are intended to facilitate the description of the embodiments and to simplify the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention. Like reference numbers and letters refer to like items in the figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance. In the description of the present invention, "plurality" or "a plurality" means at least two or two unless specifically defined otherwise. In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, "disposed," "mounted" or "connected" is to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The terms used in the following claims should not be construed to limit the invention to the specific embodiments disclosed in the specification. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A depth detection system, comprising:

the transmitting module is used for transmitting a detection light beam with a reference pattern;

the receiving module is used for collecting a detection light beam with a detection pattern reflected by an external object;

the straight line where the edge of the transmitting module and/or the receiving module is located has a certain angle relative to the straight line where the base line of the transmitting module and the receiving module is located; or

The straight line where the edge of the transmitting module is located and the straight line where the edge of the receiving module is located have a certain angle.

2. The depth detection system of claim 1, wherein the transmitting module has a light emitting surface facing an external projection space, the transmitting module has a transmitting axis perpendicular to the light emitting surface, the receiving module has a light sensing surface facing an external projection space, the receiving module has a light sensing axis perpendicular to the light sensing surface, the light emitting surface and the light sensing surface are parallel to each other, or the light emitting surface and the light sensing surface are located on the same plane.

3. The depth detection system of claim 2, wherein a straight line on which an edge of a light emitting surface of the transmitting module and/or a light sensing surface of the receiving module is located or a parallel line thereof has an angle greater than 0 degree and less than or equal to 45 degrees with respect to a straight line on which the base line is located.

4. The depth detection system of claim 2, wherein an angle between a straight line on which an edge of a light emitting surface of the transmitting module is located and a straight line on which an edge of a light sensing surface of the receiving module is located is greater than 0 degree and less than or equal to 45 degrees.

5. The depth detection system of claim 1, wherein the transmitter module and the receiver module are mounted such that the detection pattern is at an angle relative to the baseline.

6. The depth detection system of claim 1, wherein the emission module comprises a light emitting array for emitting the detection beam with the reference pattern and a diffractive optical element disposed above the light emitting array for splitting, replicating and projecting the detection beam emitted by the light emitting array into space.

7. The depth detection system of claim 1, wherein the emitting module projects the detection beam with the reference pattern to an external projection area, and the receiving module receives the detection beam with the detection pattern in a photosensitive area, the photosensitive area being a portion of the projection area.

8. The depth detection system of claim 1, wherein the reference pattern comprises a plurality of identical sub-reference patterns having rectangular edges, the sub-reference patterns having a detection length greater than a width of the sub-reference patterns.

9. A support for the depth detection system according to any one of claims 1 to 8, wherein the support comprises a main body having a rectangular parallelepiped shape, one surface of the main body has a first receiving groove and a second receiving groove which are recessed inwards, the first receiving groove is used for receiving the transmitting module of the depth detection system, the second receiving groove is used for receiving the receiving module of the depth detection system, the first receiving groove and the second receiving groove have rectangular openings, and a straight line of a rectangular edge of the first receiving groove and a straight line of a rectangular edge of the second receiving groove have an angle greater than 0 degree and less than or equal to 45 degrees.

10. An electronic device for depth information detection of an external object, wherein the electronic device comprises the depth detection system of any one of claims 1 to 8 or the cradle of claim 9.