CN214846079U - Transmission module, image capturing module and electronic equipment - Google Patents

Abstract

The application discloses transmission module, get for instance module and electronic equipment. The transmitting module comprises a light source and a transmitting module, wherein the light source is used for emitting array light beams; the collimator is arranged on the path of the array light beam emitted by the light source; the first driving piece is connected with the collimator and used for driving the collimator to be close to or far away from the light source so as to change the spot size of the array light beam emitted by the light source, which is projected to the surface of the collimator close to the light source; and the diffractive optical element is arranged on one side of the collimator, which is far away from the light source, and is used for receiving the collimated light beam and emitting a patterned light beam. Above-mentioned transmission module is through integrateing structured light detection function and auxiliary lighting function in the transmission module, only need can realize structured light detection function and auxiliary lighting function for trompil of transmission module design on the panel, reduces the cost of manufacture of panel, increases the aesthetic property of panel, is favorable to promoting the bulk strength of screen.

Description

Transmission module, image capturing module and electronic equipment

Technical Field

The application relates to get for instance technical field, especially relate to a transmission module, get for instance module and electronic equipment.

Background

Electronic devices such as mobile phones are usually configured with a front camera, a face unlocking sensing module (structured light module), and a speaker microphone module. In order to realize the full-screen function of the mobile phone, a glass cover plate on the front side of the mobile phone needs to be punched or a high-transmittance panel pixel arrangement design needs to be performed on a display panel so as to increase the transmittance of light. The current under-screen structured light module generally comprises a floodlight module, a receiving imaging module and a projection point emitting module.

In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: for realizing under-screen structured light scheme, floodlighting module and projection point emission module need design the trompil respectively on the panel, receive the formation of image module and also need design the trompil on the panel, and the cost of manufacture of panel can be increased by a wide margin to three trompil, reduces the aesthetic property of panel, and the regional resolution ratio of trompil can reduce for improving the penetration rate, and simultaneously, too much trompil will lead to screen bulk strength to reduce.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a transmitting module, an image capturing module and an electronic device to solve the above problems.

An embodiment of the present application provides a transmission module, including:

a light source for emitting an array beam;

the collimator is arranged on the path of the array light beam emitted by the light source and used for adjusting the array light beam emitted by the light source and emitting a collimated light beam;

the first driving piece is connected with the collimator and used for driving the collimator to be close to or far away from the light source so as to change the spot size of the array light beam emitted by the light source, which is projected to the surface of the collimator close to the light source; and

and the diffractive optical element is arranged on one side of the collimator, which is far away from the light source, and is used for receiving the collimated light beam and emitting a patterned light beam.

Above-mentioned emission module is close to or keeps away from the light source through first driving piece drive collimator, changes the array light beam that the light source sent and throws the facula size that is close to the surface of light source to the collimator, and the array light beam sends collimated light beam behind the collimation of collimator, and collimated light beam sends patterning light beam behind the diffraction replication effect of diffraction optical element again. The patterned light beam can be clear speckles or a surface light source according to the size of light spots, and can be used for structured light detection, auxiliary illumination or flight time detection. Wherein, the structural light detection function and the auxiliary lighting function integration in the transmission module, only need can realize structural light detection function and auxiliary lighting function for trompil of transmission module design on the panel, reduce the cost of manufacture of panel, increase the aesthetic property of panel, be favorable to promoting the bulk strength of screen.

In some embodiments, when the collimator is driven by the first driving element to a first preset distance from the light source, the array light beam emitted by the light source can be used for structured light detection after passing through the collimator and the diffractive optical element;

when the collimator is driven by the first driving piece to be at a second preset distance from the light source, array beams emitted by the light source can be used for flight time detection after passing through the collimator and the diffractive optical element;

when the distance between the collimator and the light source is between a first preset distance and a second preset distance, the array light beams emitted by the light source can be used for auxiliary lighting after passing through the collimator and the diffractive optical element.

Therefore, the collimator meets the distance relation between the collimator and the light source, and the light beam emitted by the emitting module can be used for structured light detection, flight time detection and auxiliary illumination.

In some embodiments, the first drive member comprises:

a body;

the moving piece is arranged on the body and comprises a light through hole, and the collimator is arranged in the light through hole; and

and the coil is wound on the outer side surface of the moving piece, and the moving piece and the collimator are driven to be close to or far away from the light source after the coil is electrified.

Thus, the first driving member fulfills the function of driving the collimator by satisfying the above-described structure, and can frequently drive the collimator.

In some embodiments, the collimator includes a first lens, and the first lens is connected to the first driving member.

So, the collimater is through satisfying above-mentioned structure, and the focus of collimater can not change, and the emission module realizes that structured light surveys, auxiliary lighting or flight time surveys required easy operation.

In some embodiments, the collimator includes at least two first lenses, and at least two of the first lenses are connected to the first driving member.

So, the collimater is through satisfying above-mentioned structure, and the focus of collimater can not change, and the emission module realizes that structured light surveys, auxiliary lighting or flight time surveys required easy operation.

In some embodiments, the collimator includes at least two first lenses, at least one of the at least two first lenses is connected to the first driving member, wherein the number of the first lenses connected to the first driving member is less than the number of the first lenses in the collimator.

Thus, the collimator can change the size of the light spot of the array light beam irradiated to the surface of the diffractive optical element through the collimator by satisfying the structure, so as to change the area or the size of the light spot of the patterned light beam irradiated to the surface of the space target, thereby realizing the corresponding structured light detection function, the auxiliary illumination function or the flight time detection function.

An embodiment of the present application further provides an image capturing module, including:

the emission module as described above, for projecting a patterned beam onto a surface of a spatial target; and

the receiving module is arranged on one side of the transmitting module and used for receiving an incident beam, wherein the incident beam is at least part of the patterned beam reflected by the surface of the space target.

The image capturing module drives the collimator to be close to or far away from the light source through the first driving piece, the size of a light spot of the surface, close to the light source, of the collimator, of an array light beam emitted by the light source is changed, the array light beam emits a collimated light beam after the collimation effect of the collimator, and the collimated light beam emits a patterned light beam after the diffraction replication effect of the diffraction optical element. The patterned light beam can be clear speckles or a surface light source according to the size of light spots, and can be used for structured light detection, auxiliary illumination or flight time detection. Wherein, the structural light detection function and the auxiliary lighting function integration in the emission module, only need can realize structural light detection function, auxiliary lighting function and receiving module for two trompils of emission module and receiving module design on the panel, reduce the cost of manufacture of panel, increase the aesthetic property of panel, be favorable to promoting the bulk strength of screen.

In some embodiments, the receiving module comprises:

a second lens for converging the incident light beam;

at least one photosensitive element, arranged opposite to the second lens, for receiving the incident light beam converged by the second lens; and

and the processing circuit is connected with the light source and at least one photosensitive element.

In some embodiments, the number of the photosensitive elements is two, and the receiving module further includes:

the reflecting component is used for receiving the incident light beam converged by the second lens and changing the propagation direction of the incident light beam through reflection; and

the second driving piece is connected with the reflection assembly and used for driving the reflection assembly to actuate so as to change the position and/or the angle of the reflection assembly relative to at least one of the two photosensitive elements.

Therefore, the two photosensitive elements are respectively used for receiving the light beams reflected by the structured light detection and the auxiliary illumination or the flight time detection, so that the image taking module is favorable for accurately taking images; through reflection assembly and second driving piece, change the propagation direction of incident beam, make incident beam throw different photosensitive element, get for instance the module and can select different photosensitive element according to different function needs, be favorable to getting for instance more accurate getting for instance of module.

An embodiment of the present application further provides an electronic device, including the image capturing module as described above.

The electronic equipment drives the collimator to be close to or far away from the light source through the first driving piece, the size of a light spot of the surface, close to the light source, of the collimator, projected by the array light beam emitted by the light source is changed, the array light beam emits a collimated light beam after the collimation effect of the collimator, and the collimated light beam emits a patterned light beam after the diffraction replication effect of the diffraction light source element. The patterned light beam can be clear speckles or a surface light source according to the size of light spots, and can be used for structured light detection, auxiliary illumination or flight time detection. Wherein, the structural light detection function and the auxiliary lighting function are integrated in the emission module, and the structural light detection function, the auxiliary lighting function and the receiving function can be realized only by designing two holes for the emission module and the receiving module on the panel of the electronic equipment, so that the manufacturing cost of the panel is reduced, the attractiveness of the panel is improved, and the overall strength of the screen of the electronic equipment is favorably improved.

Drawings

Fig. 1 is a schematic structural diagram of an image capturing module according to a first embodiment of the present application.

Fig. 2 is a schematic optical path diagram of a transmitting module according to a first embodiment of the present application.

Fig. 3 is a schematic structural diagram of an image capturing module according to a second embodiment of the present application.

Fig. 4 is a schematic structural diagram of an image capturing module according to a third embodiment of the present application.

Fig. 5 is a schematic optical path diagram of a transmitting module according to a third embodiment of the present application.

Fig. 6 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application.

Description of the main elements

Electronic device 1000

Image capturing module 100, 200, 300

Transmitting module 10, 210, 310

Light sources 11, 311

Collimator 12, 312

First lenses 312a, 312b

First light spot 122

Second light spot 124

First driving member 13, 313

Body 131

Moving part 132

Light passing hole 133

Coil 134

Magnetic yoke 135

Diffractive optical element 14, 314

Patterned layer 142

Diffractive layer 144

Fixing member 15

Receiving module 20, 220

Second lens 22, 222

Photosensitive element 24

The first photosensitive member 242

The second photosensitive member 244

Reflecting component 226

Supporting part 30

Housing 40

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and are only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means three or more unless specifically defined otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, a first embodiment of the present application provides an image capturing module 100, in which the image capturing module 100 at least includes a transmitting module 10 and a receiving module 20.

The emission module 10 at least includes a light source 11, a collimator 12, a first driving member 13 and a diffractive optical element 14. The light source 11 is used for emitting array light beams; the collimator 12 is disposed on a path of the array light beam emitted by the light source 11, and is configured to adjust the array light beam emitted by the light source 11 and emit a collimated light beam; the first driving member 13 is connected to the collimator 12, and is configured to drive the collimator 12 to move closer to or away from the light source 11, so as to change the size of a light spot projected by the array light beam emitted by the light source 11 onto a surface of the collimator 12 close to the light source 11; a diffractive optical element 14 is arranged on the side of the collimator 12 facing away from the light source 11 for receiving the collimated light beam and emitting a patterned light beam.

Above-mentioned emission module 10 is close to or keeps away from light source 11 through first driving piece 13 drive collimator 12, changes the array beam that light source 11 sent and throws the facula size that collimator 12 is close to the surface of light source 11, and the array beam sends collimated light beam after the collimation of collimator 12, and the collimated light beam sends the patterning light beam after the diffraction replication effect of diffractive optical element 14 again. The patterned light beam can be clear speckles according to the size of the light spot and can be used for structured light detection; and the light source can also be a surface light source and can be used for auxiliary illumination or flight time detection.

In this embodiment, the light source 11 emits an array beam toward the collimator 12, the light source 11 is a Vertical Cavity Surface Emitting Laser (VCSEL), and the beam emitted by the light source 11 is infrared light. In this embodiment, the VCSEL array is selected as the light source 11, that is, the VCSEL array light source includes N × N laser emitters, each laser emitter can emit a light beam, N is greater than 1, and N is a natural number.

It is understood that, in other embodiments, the light source 11 may also be a light emitting element such as an Edge Emitting Laser (EEL) or a Light Emitting Diode (LED), or may also be an array light source composed of a plurality of light emitting elements. The light beam emitted by the light source 11 may also be visible light, ultraviolet light, or the like.

Referring to fig. 2, the array beam emitted from the light source 11 projected onto the surface of the collimator 12 generates a plurality (N × N) of first light spots 122, where the first light spots 122 are areas of the surface of the collimator 12 on which the beams emitted from the single laser emitter are projected. Note that, the area here refers to a projection area of a spot of the light beam projected onto the surface of the collimator 12 in the optical axis direction. When the collimator 12 is moved by the first driving member 13, the size of the first light spots 122 projected onto the surface of the collimator 12 by the array light beam emitted from the light source 11 changes, the closer the collimator 12 is to the light source 11, the smaller the first light spots 122 projected onto the surface of the collimator 12 by the array light beam emitted from the light source 11 are, and the farther the collimator 12 is from the light source 11, the larger the first light spots 122 projected onto the surface of the collimator 12 by the array light beam emitted from the light source 11 are. The array light beams emitted by the light source 11 all have a certain divergence angle, and are changed into collimated light beams after the action of the collimator 12, and the collimated light beams are parallel light beams. After passing through the collimator 12, the first light spot 122 generates a second light spot 124 on a side of the collimator 12 away from the light source 11, and an area of the second light spot 124 is greater than or equal to an area of the first light spot 122. The collimator 12 may perform only the collimation on the array light beam, or perform the collimation plus the diffusion, and when having the diffusion, the area of the second light spot 124 is larger than that of the first light spot 122, and the overlap between the light spots finally projected to the surface of the spatial target object is larger, that is, the area light source is more obvious.

In this embodiment, when the emission module 10 is used for structured light detection, the distance between the collimator 12 and the light source 11 is a selected first preset distance, at this time, the area of the plurality of first light spots 122 projected onto the collimator 12 by the array light beam emitted by the light source 11 is relatively minimum, and after the collimation effect of the collimator 12 and the diffraction replication effect of the diffractive optical element 14, the light beam projected onto the surface of the spatial target object is a clear speckle, and can be used for structured light detection. It should be noted that, when the distance between the collimator 12 and the light source 11 is the first preset distance, the area of the first light spot 122 is not the absolute minimum, but is the most reasonable light spot area for structured light detection, and when the area is smaller, the area is not suitable for structured light detection after the collimation effect of the collimator 12 and the diffraction replication effect of the diffractive optical element 14, and the energy is relatively concentrated, so that the risk of injuring the human body exists during face recognition.

When the first driving member 13 drives the collimator 12 to move away from the light source 11, the distance between the collimator 12 and the light source 11 is continuously increased (greater than the first preset distance), the area of the plurality of first light spots 122, which are projected onto the collimator 12 by the array light beam emitted by the light source 11, is continuously increased, the area of the collimated light beam emitted by the collimator 12 is correspondingly continuously increased, the area of the light spot, which is projected onto the diffractive optical element 14, of the collimated light beam is correspondingly increased, and the light spots, which are projected onto the spatial target object, are correspondingly increased and even overlapped under the diffraction replication action of the diffractive optical element 14, that is, a surface light source is generated (the light spots become a surface area light field after being overlapped, that is, the surface light source). When the distance between the collimator 12 and the light source 11 reaches a second preset distance, the array light beams emitted by the light source 11 are projected to overlap between the plurality of first light spots 122 on the collimator 12, and then sequentially pass through the collimator 12 and the diffractive optical element 14 to project a uniform surface light source, which can be used for flight time detection. When the distance between the collimator 12 and the light source 11 is greater than the second preset distance, on one hand, the divergence degree of the light beam is relatively serious, and the energy of the light beam is relatively small, which is not favorable for the light beam to be reflected back to the receiving module 20 from the surface of the space target object, and is also not favorable for the flight time detection; on the other hand, the space for movement in the transmitting module 10 is increased, which is not favorable for the slimness of the image capturing module 100.

In this embodiment, the whole collimator 12 is driven by the first driving component 13 to move closer to or away from the light source 11, and the size of the plurality of first light spots 122 projected onto the surface of the collimator 12 by the array light beam emitted by the light source 11 changes. The collimator 12 comprises a first lens, the focus of which is not adjustable, i.e. the focus of the collimator 12 is not adjustable. The first lens may be a fresnel lens or other lens.

It will be appreciated that in other embodiments, the collimator 12 may also be a lens set or fresnel mechanism, that is, the collimator 12 may also include at least two first lenses, adjacent first lenses are fixedly connected to form the collimator 12, and the whole collimator 12 is driven by the first driving element 13. The collimator 12 may also include lenses with different curvatures, but the focal point of the whole collimator 12 composed of the lenses is not adjustable.

In this embodiment, the first driving member 13 is a voice coil motor structure, and the first driving member 13 includes a body 131, a moving member 132, a coil 134, and a yoke 135. The body 131 is arranged between the light source 11 and the diffractive optical element 14, the moving member 132 is arranged in the body 131, the moving member 131 includes a light-passing hole 133, the light-passing hole 133 is located on a path of a light beam emitted by the light source 11, and the collimator 12 (a first lens or at least two first lenses) is arranged in the light-passing hole 133, so that an array light beam emitted by the light source 11 is projected to the collimator 12, and the array light beam emitted by the light source 11 is prevented from interfering with the first driving member 13; the coil 134 is wound on the outer side surface of the moving member 132, the magnetic yoke 135 is arranged on the inner side surface of the body 131, the magnetic yoke 135 and the coil 134 are arranged oppositely, a magnetic field generated after the coil 134 is electrified and a magnetic field generated by the magnetic yoke 135 have a magnetic action, and the body 131 is fixedly arranged because the magnetic yoke 135 is fixedly arranged on the inner side surface of the body 131, so that the coil 134 drives the moving member 132 and the collimator 12 to be close to or far away from the light source.

It is understood that in other embodiments, the first driving member 13 may also be a Micro Electro Mechanical System (MEMS), a shape memory alloy wire (SMA), or the like.

In this embodiment, the diffractive optical element 14 is used to diffract the collimated beam after passing through the collimator 12. The diffractive optical element 14 includes a pattern layer 142 and a diffraction layer 144. The pattern layer 142 is arranged on the side of the collimator 12 facing away from the light source 11, and the pattern layer 142 comprises a plurality of irregular speckle patterns; a diffraction layer 144 is arranged on the side of the patterned layer 142 facing away from the collimator 12, the diffraction layer 144 being arranged to split the light beam.

It should be noted that, when performing structured light detection and infrared auxiliary illumination, the requirements of the emission module 10 on the light source 11 are different, and in the structured light detection process, the requirements are higher, it is necessary for the light source 11 to emit a brighter light beam, and all laser emitters of the light source 11 emit light beams; during infrared auxiliary lighting, the requirement is low, only part of the laser emitters of the light source 11 need to emit light beams, and after the light beams emitted by part of the laser emitters of the light source 11 pass through the collimator 12 and the diffractive optical element 14, light spots with overlapping areas can still be projected, so that the infrared auxiliary lighting device can be completely used for infrared auxiliary lighting. According to the needs, the processing circuit controls all or part of the laser emitters of the light source 11 to emit light beams, so that the power of the emitting module 10 can be reduced and the energy can be saved on the premise of realizing corresponding functions.

When the structured light detection function is used, the structured light detection function generally needs to be used together with the auxiliary lighting function, and specifically, the collimator 12 is driven to be close to or far from the light source 11 by the first driving member 13, that is, the structured light detection function and the auxiliary lighting function are switched back and forth, and a corresponding time sequence program and a corresponding calculation program are preset in the processing circuit, so that the structured light detection result can be calculated.

Referring to fig. 1, in the present embodiment, the receiving module 20 is disposed at one side of the transmitting module 10. The emitting module 10 is configured to project a patterned light beam toward a surface of the spatial target, and the receiving module 20 is configured to receive an incident light beam, which is at least a portion of the patterned light beam reflected by the surface of the spatial target. The transmitting module 10 and the receiving module 20 are substantially parallel to each other and located in the same plane, so that the receiving module 20 can receive the incident light beam conveniently.

The image capturing module 100 drives the collimator 12 to be close to or far away from the light source 11 through the first driving part 13, the size of a light spot of the surface of the collimator 12 close to the light source 11, which is projected by the array light beam emitted by the light source 11, is changed, the array light beam emits a collimated light beam after being collimated by the collimator 12, the collimated light beam emits a patterned light beam after being diffracted and copied by the diffractive optical element 14, and the patterned light beam can be a clear speckle according to the size of the light spot and can also be a surface light source and can be used for structured light detection, auxiliary illumination or flight time detection. Wherein, the structure light detection function and the auxiliary lighting function are integrated in emission module 10, and only need can realize structure light detection function, auxiliary lighting function and receiving function for two trompils of emission module 10 and receiving module 20 design on the panel, reduce the cost of manufacture of panel, increase the aesthetic property of panel, be favorable to promoting the bulk strength of screen.

In this embodiment, the receiving module 20 includes a second lens 22 and a photosensitive element 24. The second lens 22 is used for converging the incident beam, and meanwhile, the second lens 22 has the function of protecting the photosensitive element 24 from being damaged and polluted; the light sensing element 24 is disposed opposite to the second lens 22 and is configured to receive the incident light beam converged by the second lens 22, that is, the light sensing element 24 receives light information of the incident light beam and processes the light information accordingly.

In this embodiment, the image capturing module 100 further includes a processing circuit (not shown), which is connected to the light source 11, the first driving member 13 and the photosensitive element 24, and is used for controlling all or part of the laser emitters of the light source 11 to emit light beams, controlling the first driving member 13 to operate, and receiving light information generated by the photosensitive element 24.

In this embodiment, the image capturing module 100 further includes a supporting portion 30. The supporting portion 30 is connected to the transmitting module 10 and the receiving module 20, and is used for supporting the transmitting module 10 and the receiving module 20. The supporting portion 30 generally includes two grooves, the transmitting module 10 and the receiving module 20 are disposed in the corresponding grooves, and when the under-screen structured light module is used for an electronic device, holes can be formed on the panel at positions corresponding to the grooves. The supporting portion 30 serves as a housing of the transmitter module 10 and the receiver module 20, and functions to support and protect the transmitter module 10 and the receiver module 20.

Referring to fig. 3, an image capturing module 200 according to a second embodiment of the present application has substantially the same structure as the image capturing module 100 according to the first embodiment, except that; in this embodiment, the receiving module 220 includes two photosensitive elements, and the receiving module 220 further includes a reflective component 226 and a second driving component (not shown). The two photosensitive elements are a first photosensitive element 242 and a second photosensitive element 244, respectively, and are oppositely arranged along a direction perpendicular to the optical axis, and the reflection assembly 226 is configured to receive the incident light beam converged by the second mirror 222 and change the propagation direction of the incident light beam by reflection; the second driving member is connected to the reflection element 226 for driving the reflection element 226 to actuate.

Specifically, the reflective assembly 226 comprises a triangular prism and the third drive assembly drives the triangular prism to rotate about the axis of the triangular prism to change the direction of propagation of the incident light beam.

In this embodiment, the second driving member is substantially a shape memory alloy wire, one end of the shape memory alloy wire is connected to the processing circuit of the image capturing module 200, and the other end of the shape memory alloy wire is connected to the prism. In addition, by controlling the magnitude of the current, the magnitude of the temperature rise of the shape memory alloy can be controlled, thereby controlling the amount of recovery of the deformation of the shape memory alloy, and thus controlling the angle of rotation of the triangular prism.

The term "shape memory alloy" in the present application means an alloy that is deformed by martensitic transformation, heated to a temperature higher than the final temperature, and then the low-temperature martensite is inverted to a high-temperature parent phase to return to the original shape before the deformation, or returns to the martensite shape by the release of internal elastic energy during the subsequent cooling process. For example, a shape memory alloy is deformed by heating the alloy to a temperature equal to or higher than its transformation temperature, and then quenched to fix the deformation.

It is understood that in other embodiments, the second driving member may be at least two shape memory alloy wires, one end of each shape memory alloy wire is fixed on the processing circuit of the image capturing module 200, and the other end is fixed on the prism. Specifically, the number of shape memory alloy wires may be, but is not limited to, 2, 3, 4, 5, 6, etc. The processing circuit can pass through the electric current of passing through the size difference on different shape memory alloy lines, so can more accurate control the angle and the direction of the rotation of prism.

It is understood that in other embodiments, the first photosensitive element 242 and the second photosensitive element 222 are disposed opposite to each other along the optical axis, and the second photosensitive element 244 is disposed along a direction perpendicular to the optical axis, i.e., the first photosensitive element 242 and the second photosensitive element 244 are disposed on two opposite sides of the receiving module 20. When the image capturing module 200 is used for structured light detection, the incident light beam is projected onto the first photosensitive element 242 through the second lens 222, and the incident light beam does not pass through the reflective element 226. When the image capturing module 200 is used for infrared auxiliary illumination or flight time detection, the second driving element drives the reflection element 226 to move, and the reflection element 226 moves to the path of the incident light beam, so that the incident light beam is projected onto the reflection element 226, and is reflected by the reflection element 226 and then projected onto the second photosensitive element 244.

It is understood that in other embodiments, the reflective assembly 226 can be a flat mirror, a right-angle prism, a pentaprism, a right-angle roof prism, a reflective film, any irregular prism or any combination of the above elements that can perform the reflective function of the reflective assembly 226; accordingly, the first and second light sensing members 242 and 244 may be disposed according to the type of the reflecting assembly 226, and the second driving member has a rotating or moving function according to the reflecting assembly 226.

Referring to fig. 4, an image capturing module 300 according to a third embodiment of the present application is substantially similar to the image capturing module 100 according to the first embodiment, except that: the collimator 312 of the emission module 310 of the present embodiment includes two first lens pieces 312a and 312b, wherein one first lens piece 312a is connected to the first driving piece 313 and disposed close to the light source 311, and the other first lens piece 312b is fixed to a side of the first lens piece 312a departing from the light source 311 through the fixing piece 15.

Referring to fig. 5, in the embodiment, the first lens 312a is driven by the first driving element 313 to be close to or far from the light source 311, so as to change the size of the light spot irradiated by the array light beam emitted by the light source 311 to the surface of the first lens 312a close to the light source 311, the first lens 312a has a diffusion function, the array light beam emitted by the light source 311 is diffused through the first lens 312a, that is, the divergence angle of the light beam passing through the first lens 312a is larger than that of the light beam emitted by the light source 311, the light beam diffused through the first lens 312a emits a collimated light beam after passing through the first lens 312b, and the collimated light beam irradiates the diffractive optical element 314 and irradiates the surface of the space target object after passing through the diffractive optical element 314. In this embodiment, collimator 312 has the effect of diffusion and collimation, drive first lens 312a through first driving piece 313 and be close to or keep away from light source 311, can change the facula size that light beam that light source 311 sent shines the surface to first lens 312a, thereby influence the facula size of collimated light beam, be favorable to launching module 310 from the quick switch-over of structured light detection function to auxiliary lighting function and flight time detection function, and simultaneously, can reduce the requirement that launching module 310 can be used to the space of removal to the inside.

It is understood that in other embodiments, the first lens 312a may also have a converging function, that is, the light beam irradiated to the first lens 312a has a smaller spot after passing through the first lens 312a, and the light beam irradiated to the surface of the diffractive optical element 314 has a smaller spot after being collimated by the first lens 312 b. In this case, the divergence angle of the array light beam emitted by the light source 311 may be increased, and the design requirement for the divergence angle of the light source 311 is reduced.

It is understood that, in other embodiments, the number of the first lens 312a and 312b in the collimator 312 may also be three, four, five or more, wherein the number of the first lens 312a connected to the first driving element is less than the total number of the first lens 312a and 312b, and two or more first driving elements 313 may also be provided, each corresponding to one first lens 312a and 312b, so as to enhance the capability of the emission module 310 to rapidly switch between the structured light detection function, the auxiliary illumination function and the time-of-flight detection function. The larger the number of lenses, the lower the space requirement of the launching module 310 for movement, and usually a smaller distance of movement of one lens can change the size of the spot or area that the launching module 310 ultimately illuminates on the surface of the space target.

Referring to fig. 6, a fourth embodiment of the present application provides an electronic device 1000, where the electronic device 1000 at least includes a housing 40 and an image capturing module of any one of the first embodiment and the third embodiment, and the embodiment takes the image capturing module 100 of the first embodiment as an example to explain, and the image capturing module 100 is disposed in the housing 40.

The electronic device 1000 drives the collimator 12 to be close to or far from the light source 11 through the first driving part 13, the size of a light spot of an array light beam emitted by the light source 11, which is projected to the surface of the collimator 12 close to the light source 11, is changed, the array light beam emits a collimated light beam after being collimated by the collimator 12, and the collimated light beam emits a patterned light beam after being diffracted and copied by the diffraction light source element 14, wherein the patterned light beam can be a clear speckle or a surface light source according to the size of the light spot, and can be used for structured light detection, auxiliary illumination or flight time detection. Wherein, the structure light detection function and the auxiliary lighting function are integrated in the emission module 10 of the electronic device 1000, and the structure light detection function, the auxiliary lighting function and the receiving function can be realized only by designing two openings for the emission module 10 and the receiving module 20 on the panel of the electronic device 1000, so that the manufacturing cost of the panel is reduced, the attractiveness of the panel is improved, and the overall strength of the screen of the electronic device 1000 is favorably improved.

It is to be understood that the structure of the electronic device 1000 is not limited to the electronic device 1000, and may include more or less components than those described, or some components may be combined, some components may be separated, or different components may be arranged.

The electronic device 1000 of the embodiment is a mobile phone, and the image capturing module 100 is an underscreen structured light module of the mobile phone.

It is understood that, in other embodiments, the electronic device 1000 may also be a tablet computer, a notebook computer, a camera, a smart watch with a camera device, and the image capturing module 100 is an underscreen structured light module or a time-of-flight module of the electronic device 1000.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application and not for limiting, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present application without departing from the spirit and scope of the technical solutions of the present application.

Claims (10)

1. A transmitter module, comprising:

a light source for emitting an array beam;

the collimator is arranged on the path of the array light beam emitted by the light source and used for adjusting the array light beam emitted by the light source and emitting a collimated light beam;

the first driving piece is connected with the collimator and used for driving the collimator to be close to or far away from the light source so as to change the spot size of the array light beam emitted by the light source, which is projected to the surface of the collimator close to the light source; and

and the diffractive optical element is arranged on one side of the collimator, which is far away from the light source, and is used for receiving the collimated light beam and emitting a patterned light beam.

2. The transmit module of claim 1,

when the collimator is driven by the first driving piece to be at a first preset distance from the light source, array beams emitted by the light source can be used for structured light detection after passing through the collimator and the diffractive optical element;

when the collimator is driven by the first driving piece to be at a second preset distance from the light source, array beams emitted by the light source can be used for flight time detection after passing through the collimator and the diffractive optical element;

when the distance between the collimator and the light source is between a first preset distance and a second preset distance, the array light beams emitted by the light source can be used for auxiliary lighting after passing through the collimator and the diffractive optical element.

3. The launch module of claim 1, wherein said first drive member comprises:

a body;

the moving piece is arranged on the body and comprises a light through hole, and the collimator is arranged in the light through hole; and

and the coil is wound on the outer side surface of the moving piece, and the moving piece and the collimator are driven to be close to or far away from the light source after the coil is electrified.

4. The launch module of claim 1 wherein said collimator comprises a first mirror, said first mirror being connected to said first actuator.

5. The launch module of claim 1 wherein said collimator comprises at least two first mirrors, each of said at least two first mirrors being connected to said first actuator.

6. The launch module of claim 1, wherein the collimator comprises at least two first lenses, at least one of the at least two first lenses being coupled to the first actuator, wherein the number of first lenses coupled to the first actuator is less than the number of first lenses in the collimator.

7. An image capturing module, comprising:

the launch module of any of claims 1 to 6, for projecting a patterned beam of light onto a surface of a spatial target; and

the receiving module is arranged on one side of the transmitting module and used for receiving an incident beam, wherein the incident beam is at least part of the patterned beam reflected by the surface of the space target.

8. The image capturing module of claim 7, wherein the receiving module comprises:

a second lens for converging the incident light beam;

at least one photosensitive element, arranged opposite to the second lens, for receiving the incident light beam converged by the second lens; and

and the processing circuit is connected with the light source and at least one photosensitive element.

9. The image capturing module as claimed in claim 8, wherein there are two photosensitive elements, the receiving module further comprises:

the reflecting component is used for receiving the incident light beam converged by the second lens and changing the propagation direction of the incident light beam through reflection; and

the second driving piece is connected with the reflection assembly and used for driving the reflection assembly to actuate so as to change the position and/or the angle of the reflection assembly relative to at least one of the two photosensitive elements.

10. An electronic device, comprising the image capturing module as claimed in any one of claims 7 to 9.

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