CN212969799U - Light emitting module, depth camera and electronic equipment - Google Patents
Light emitting module, depth camera and electronic equipment Download PDFInfo
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- CN212969799U CN212969799U CN202021535827.XU CN202021535827U CN212969799U CN 212969799 U CN212969799 U CN 212969799U CN 202021535827 U CN202021535827 U CN 202021535827U CN 212969799 U CN212969799 U CN 212969799U
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- emitting module
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Abstract
The application provides a light emission module, includes: at least two light sources; and the reflecting mechanism comprises at least one reflecting surface, and the at least one reflecting surface is arranged on the light path of the light rays emitted by the at least two light sources and is used for reflecting the light rays generated by the at least two light sources to the same emergent direction. This application is through setting up a plurality of light sources that are used for giving out light to reflecting surface reflection ray through the reflection mechanism who corresponds the setting with the light source makes the light of a plurality of light sources can follow same direction outgoing. Compare in traditional transmission module that is used for space imaging, the big and big problem of a plurality of module occupation space of single module calorific capacity among the prior art has been solved to this application. The plurality of light sources are arranged in the same module, so that the whole size is small, and the power of the projection light is large. The application provides a depth camera who has this optical transmission module simultaneously, still provides the electronic equipment who has the depth camera.
Description
Technical Field
The utility model relates to an optical imaging technical field especially relates to a light emission module, degree of depth camera and electronic equipment.
Background
In recent years, with the rapid development of the consumer electronics industry, 3D cameras having three-dimensional space ranging and imaging functions have been increasingly applied. Currently, the devices for spatial imaging are typically Time of flight (TOF) cameras or structured light cameras. The flight time camera and the structured light camera need to project light onto the light receiving surface through the transmitting module, and then receive light information on the light receiving surface through the receiving module, so that space imaging is achieved.
However, in the process of implementing the present application, the inventors found that at least the following problems exist in the prior art: in order to realize space imaging at a longer distance, it is a common practice to increase the transmitting power of the transmitting module or to set a plurality of transmitting modules at the same time; however, increasing the transmitting power of a single transmitting module can increase the heat productivity, form heat accumulation, and be not conducive to heat dissipation; and set up a plurality of emission module simultaneously and be used for the projection light, can increase the cost of formation of image module, and be unfavorable for the miniaturization of formation of image module.
SUMMERY OF THE UTILITY MODEL
Accordingly, there is a need for a light emitting module, a depth camera and an electronic device to solve the above problems.
An embodiment of the utility model provides a light emission module, include:
at least two light sources; and
and the reflecting mechanism comprises at least one reflecting surface, and the at least one reflecting surface is arranged on the light path of the light rays emitted by the at least two light sources and is used for reflecting the light rays generated by the at least two light sources to the same direction for emitting.
The light emission module of this application is through setting up a plurality of light sources that are used for giving out light to through being located reflection mechanism reflection light on the light path of a plurality of light source transmission light, make the light of a plurality of light sources can follow same direction outgoing. Compare in traditional transmission module that is used for space imaging, the big and big problem of a plurality of module occupation space of single module calorific capacity among the prior art has been solved to this application. The plurality of light sources are arranged in the same module, so that the whole size is small, and the power of the projection light is large.
Further, the number of the light sources is the same as that of the reflecting surfaces, and each reflecting surface is arranged corresponding to one light source.
The reflecting surfaces correspond to the light sources one to one, so that light rays emitted by each light source can be fully reflected by the corresponding reflecting surface, and a better reflecting effect is realized.
Further, the light emitting module comprises at least three light sources, and the reflecting mechanism comprises at least three reflecting surfaces;
the at least three reflecting surfaces jointly form a reflecting prism, the at least three light sources are arranged around the reflecting prism, and each light source is used for emitting light to one corresponding reflecting surface.
At least three reflecting surfaces jointly form a reflecting prism, so that the volume of the reflecting mechanism can be well controlled, and the light source is arranged on the periphery of the reflecting mechanism, thereby being beneficial to heat dissipation.
Furthermore, the included angle between each reflecting surface and the bottom surface of the reflecting prism is 45 degrees.
Horizontal light emitted by the light source towards the reflecting surface can be emitted along the vertical direction after being reflected by the reflecting surface.
Further, the light emitting module further comprises a control unit, and the control unit is used for controlling at least one light source to emit light.
Whether the light sources emit light is controlled by the control unit, so that the light emitting module is used for lighting a small number of light sources when the light emitting module is used for short-distance projection, and lighting a large number of light sources when the light emitting module is used for long-distance projection.
Further, each light source emits a dot matrix, and the dot matrixes emitted by different light sources are overlapped or spaced at intervals on the reflected area.
The light source can form a plurality of light spots on the surface of the light receiving surface by emitting a dot matrix, so that the spatial imaging of the light receiving surface is realized conveniently by receiving the information of the light spots.
This application provides a depth camera simultaneously, includes:
the light emitting module of the above embodiment; and
and the receiving module is used for receiving the light emitted by the light emitting module.
The depth camera is used for space distance measurement and imaging, and the distances between different positions on the light receiving surface and the camera are judged by obtaining the time difference between the transmitting time of the light transmitting module and the receiving time of the receiving module, so that the space distance measurement and imaging are realized.
Furthermore, the light emitting module is a vertical cavity surface emitting laser, and the receiving module is an infrared camera.
Furthermore, the light emitting module is a dot matrix projector, and the receiving module is an infrared camera.
This application provides an electronic equipment simultaneously, includes:
a housing, and
the depth camera of the above embodiment, the depth camera is disposed in the housing.
The embodiment of the utility model provides a light emission module and depth camera and electronic equipment that have this light emission module are through setting up a plurality of light sources and with being located reflection mechanism on the light path of a plurality of light source transmission light for the light that a plurality of light sources in the single light emission module sent can be towards same outgoing direction outgoing, still accessible control is lighted the quantity of light source and is controlled the transmitting power of light. Compare in traditional emission module, this application has solved the big difficult radiating problem of heat dissipation of a plurality of emission module occupation space of use that exist among the prior art, with high costs and use single high-power emission module calorific capacity greatly.
Drawings
Fig. 1 is a schematic perspective view of a light emitting module according to a first embodiment of the present application.
Fig. 2 is a schematic perspective view of a light emitting module according to a second embodiment of the present application.
FIG. 3 is a block diagram of a time-of-flight depth camera according to an embodiment of the present disclosure.
Fig. 4 is a schematic block diagram of a structured light camera according to an embodiment of the present disclosure.
Fig. 5 is a schematic projection view of a light emitting module according to a first embodiment of the present disclosure on a diffuser.
Fig. 6 is a schematic projection view of a light emitting module according to a first embodiment of the present disclosure on a light receiving surface.
Fig. 7 is another schematic projection view of the light emitting module according to the first embodiment of the present application on the light receiving surface.
Fig. 8 is a schematic view of another projection of the light emitting module according to the first embodiment of the present application onto the light receiving surface.
Fig. 9 is a schematic perspective view of an electronic device according to an embodiment of the present application.
Description of the main elements
Reflecting surface 142
Diffuser 16
Receiving module 20
Time-of-flight depth camera 100
Structured light camera 200
The following detailed description of the invention will be further described in conjunction with the above-identified drawings.
Detailed Description
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 work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "electrically connected" to another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "electrically connected" to another component, it can be connected by contact, e.g., by wires, or by contactless connection, e.g., by contactless coupling.
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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. 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 invention 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 invention provides a light emitting module 10 for projecting light onto a light receiving surface (not shown). The light emitting module 10 includes at least two light sources 12 and a reflecting mechanism 14.
The light source 12 is for emitting light. The reflective mechanism 14 includes at least one reflective surface 142. Specifically, the reflecting surface 142 is disposed corresponding to the light sources 12, and is used for reflecting the light generated by at least two light sources 12 and reflecting the light to the same outgoing direction.
The light emitting module 10 is provided with a plurality of light sources 12 for emitting light, and reflects light rays through the reflecting surface 142 of the reflecting mechanism 14 arranged corresponding to the light sources 12, so that the light rays of the plurality of light sources 12 can be emitted in the same direction. Compare in traditional transmission module that is used for space imaging, the big and big problem of a plurality of module occupation space of single module calorific capacity among the prior art has been solved to this application. The plurality of light sources are arranged in the same module, so that the whole size is small, and the power of the projection light is large.
Referring to fig. 1, in the first embodiment of the present application, the number of the light sources 12 and the reflecting surfaces 142 is four. The four reflecting surfaces 142 form a reflecting prism together, that is, the whole reflecting mechanism 14 is a reflecting prism, and the four reflecting surfaces 142 are four outer side surfaces of the reflecting prism respectively. The reflecting prism may be a cone-angle prism or a cylindrical prism, but is not limited thereto, and a cone-angle prism is preferred in the embodiment.
The four light sources 12 are respectively located in four directions around the reflection mechanism 14 and are uniformly spaced, and the four reflection surfaces 142 have the same shape and the same size.
In the present embodiment, the light emitted from the light source 12 horizontally enters the corresponding reflecting surface 142, an included angle between each reflecting surface 142 and the bottom surface of the reflecting prism is 45 degrees, and the horizontal light emitted from the light source 12 toward the reflecting surface 142 is reflected by the reflecting surface 142 and then emitted in the vertical direction, that is, the incident light is perpendicular to the emitted light.
Further, when the light source 12 is tilted, the tilt angle of the reflecting surface 142 may be changed accordingly.
In the present embodiment, the number of the light sources 12 and the number of the reflecting surfaces 142 are equal and correspond to one another; in other embodiments of the present application, at least two light sources 12 and at least one reflecting surface 142 may be satisfied, for example: the two light sources 12 are arranged in parallel, and one reflecting surface 142 reflects light emitted from the two light sources 12 at the same time.
It is understood that only when the number of the reflecting surfaces 142 is at least three, a plurality of the reflecting surfaces 142 may constitute the reflecting prism, and one or two of the reflecting surfaces 142 may not constitute the prism-like shape. The reflecting prism may be a cone-angle prism or a cylindrical prism, but is not limited thereto, and a cone-angle prism is preferred in the embodiment.
Further, when the number of the light sources 12 and the number of the reflecting surfaces 142 are two and are corresponding to each other, the two reflecting surfaces 142 may be disposed between the two light sources 12, so as to realize that the emergent light beams of different light sources 12 are as close as possible.
It is understood that in other embodiments of the present application, the arrangement of the plurality of reflecting surfaces 142 is not limited to the form of reflecting prisms, but may also be in the form of a combined polyhedron corresponding to each light source 12, for example: the shape of the hexahedron corresponding to the four light sources 12 is not limited thereto, as long as the light emitted from the plurality of light sources 12 can be reflected to the same exit direction.
It will be appreciated that the reflective mechanism 14 also functions as a collimating element within the light emitting module 10, i.e., it also collimates the light emitted by the light source 12.
Further, in the present embodiment, the light emitting module 10 further includes a diffuser 16, and the diffuser 16 is disposed on one side of the reflection mechanism 14 and is located on a light path of the light emitted from the light source 12 along the emitting direction after being reflected by the reflection mechanism 14. The diffuser 16 is used for receiving the light reflected by the reflection mechanism 14 and diffusing the light to form a laser pattern.
In particular, the diffuser 16 may be implemented by a Diffractive Optical Element (DOE), which can further reduce the diffraction effect of the light and achieve a better light projection effect.
Further, in the present embodiment, the light emitting module 10 further includes a control unit (not shown), which is connected to the plurality of light sources 12 and is used for controlling at least one of the light sources 12 to emit light. It can be understood that when the required light is strong, a plurality of light sources can be lighted at the same time to meet the requirement, and when the required light is weak, only a few light sources need to be lighted to meet the requirement.
Referring to fig. 2, a light emitting module 10 according to a second embodiment of the present invention is provided for projecting light onto a light receiving surface (not shown), the light emitting module 10 according to the second embodiment is similar to the first embodiment, and the difference is that: the number of the light sources 12 and the reflecting surfaces 142 in the second embodiment is three.
Specifically, the three reflecting surfaces 142 together form a triangular pyramid prism, and the reflecting mechanism 14 is substantially in a triangular cone shape, and the three light sources 12 are correspondingly disposed outside the three reflecting surfaces 142.
It is understood that the light emitting module 10 also includes a diffuser 16 and a control unit (not shown).
Referring to fig. 1 to fig. 3, a time-of-flight depth camera 100 for spatial distance measurement and imaging is provided in the present embodiment. The time-of-flight depth camera 100 includes the light emitting module 10 and the receiving module 20 according to any of the embodiments described above.
Specifically, the light emitting module 10 is configured to project light to a light receiving surface (not shown), and the receiving module 20 is configured to receive light reflected by the light receiving surface, obtain depth information of the light receiving surface according to the light, and further implement spatial imaging.
Further, in the present embodiment, the light Emitting module 10 may be a Vertical-Cavity Surface-Emitting Laser (VCSEL) for vertically projecting the infrared Laser to the light receiving Surface.
Further, the receiving module 20 may be an infrared camera for capturing images on the light receiving surface.
Specifically, the receiving module 20 includes an imaging lens (not shown) and a photosensitive chip (not shown). The imaging lens is used for converging incident light rays to the photosensitive chip. The imaging lens includes at least one optical lens. In one example, the imaging lens may be an optical lens. In another example, the imaging lens may be a combination of a plurality of optical lenses. Thus, the receiving module 20 can improve the imaging effect of the photosensitive chip through the imaging lens.
Therefore, the light-sensitive chip can collect light reflected by an object, the light-sensitive chip is a light-sensitive chip specially used for space three-dimensional imaging, for example, the light-sensitive chip can be a light-sensitive chip such as a CMOS (complementary metal oxide semiconductor), an APD (avalanche photodiode), an SPAD (single photon avalanche photodiode), and the like, and pixels of the light-sensitive chip can be in the form of a single-point, a linear array, an area array, or the like.
Further, referring to fig. 1 and fig. 5 together, a schematic diagram of a projection of the light emitting module 10 in the time-of-flight depth camera 100 on the diffuser 16 is shown, light emitted by each light source 12 is reflected by the reflection mechanism 14 and then projected out of a circular illumination area, and when viewed from the position of the reflection mechanism 14 to the direction of the diffuser 16, the circular illumination areas are partially overlapped.
Further, referring to fig. 1 and fig. 6, a schematic view of a light emitted from a light source 12 in a light emitting module 10 of a time-of-flight depth camera 100 being reflected by a reflecting mechanism 14 and diffused by a diffuser 16 and then projected on a light receiving surface is shown. The projection onto the light receiving surface is a square illumination area, and the plurality of square illumination areas are partially overlapped when viewed from the position of the light emitting module 10 to the direction of the light receiving surface.
It can be understood that due to the difference between the four light sources 12 and the positions of the corresponding emergent light rays, the images projected on the light receiving surface are not completely overlapped. When the time-of-flight depth camera 100 is used for close-range imaging, the requirement can be met by only lighting one or two light sources 12, and when the time-of-flight depth camera is used for longer-range imaging, all four light sources 12 can be lighted, so that the total power of illumination is increased, and the requirement of long-range imaging is met.
Referring to fig. 4, the present embodiment further provides a structured light camera 200 for spatial imaging. The structured light camera 200 includes the light emitting module 10 and the receiving module 20 according to any of the above embodiments.
Specifically, the light emitting module 10 is configured to project light onto a light receiving surface (not shown), and the receiving module 20 is configured to receive light reflected by the light receiving surface and obtain spatial imaging information of the light receiving surface according to the light.
Further, in the present embodiment, the light emitting module 10 is a dot matrix projector, and each light source 12 is used for projecting a plurality of regularly arranged light spots.
Further, the receiving module 20 may be an infrared camera for capturing a picture of the light receiving surface, specifically, the dot matrix information on the light receiving surface.
Further, please refer to fig. 7 and 8 together, which are schematic projection diagrams illustrating two different states of light emitted by the light source 12 in the light emitting module 10 of the structured light camera 200 after being reflected by the reflecting mechanism 14. In fig. 7, the two light sources 12 emit light in a same lattice, and in fig. 8, the two light sources 12 emit light in a lattice spaced apart from each other.
It will be appreciated that the dot patterns projected by the different light sources 12 in fig. 7 overlap, and are more clear for the longer-distance spatial imaging; in fig. 8, the lattices projected by the different light sources 12 are arranged at intervals, so that the total number of light spots on the light receiving surface can be increased, and the detection accuracy is improved.
Referring to fig. 9, the present application also provides an electronic device 300, which includes a housing 310 and the time-of-flight depth camera 100 and/or the structured light camera 200 described in the above embodiments. The time-of-flight depth camera 100 and/or the structured light camera 200 are disposed in a housing 310.
It is understood that for an electronic device 300 requiring spatial imaging, the imaging may be accomplished by either the time-of-flight depth camera 100 or the structured light camera 200, and thus the electronic device 300 may have one or both of the two cameras, and the electronic device 300 of the illustrated embodiment has only one of the time-of-flight depth cameras 100.
The electronic device 300 of the embodiment of the present invention includes, but is not limited to, electronic products supporting depth imaging, such as smart phones, tablet computers, notebook computers, electronic book readers, Portable Multimedia Players (PMP), portable phones, video phones, digital still cameras, mobile medical devices, and wearable devices.
The embodiment of the utility model provides a light emission module 10 and the time of flight degree of depth camera 100, structured light camera 200 and the electronic equipment 300 that have this light emission module 10 through setting up a plurality of light sources 12 and correspond the reflection mechanism 14 that sets up and have the plane of reflection 142 with the light source for the light that a plurality of light sources 12 in the single light emission module 10 sent can be towards same outgoing direction outgoing, still can be controlled the emission power of light by the quantity of the light source 12 of lighting through the control. Compare in traditional emission module, this application has solved the big difficult radiating problem of heat dissipation of a plurality of emission module occupation space of use that exist among the prior art, with high costs and use single high-power emission module calorific capacity greatly.
The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention. Those skilled in the art can also make other changes and the like in the spirit of the present invention, and the design of the present invention can be used as long as the technical effects of the present invention are not deviated. Such variations are intended to be included within the scope of the invention as claimed.
Claims (9)
1. An optical transmission module, comprising:
the light source comprises at least two light sources, each light source emits a dot matrix, and the dot matrixes emitted by different light sources are overlapped or spaced at intervals on a reflected area; and
and the reflecting mechanism comprises at least one reflecting surface, and the reflecting surface is arranged on a light path of the light rays emitted by the light sources and used for reflecting the light rays generated by at least two light sources to the same emergent direction.
2. The light emitting module of claim 1, wherein the number of the light sources and the number of the reflective surfaces are the same, and each of the reflective surfaces is disposed corresponding to one of the light sources.
3. The light emitting module of claim 2, wherein the light emitting module comprises at least three light sources, and the reflective mechanism comprises at least three reflective surfaces;
the at least three reflecting surfaces jointly form a reflecting prism, the at least three light sources are arranged around the reflecting prism, and each light source is used for emitting light to one corresponding reflecting surface.
4. The light emission module of claim 3, wherein each of the reflective surfaces is angled at 45 degrees from the bottom surface of the reflective prism.
5. The light emitting module of claim 1, further comprising a control unit for controlling at least one of the light sources to emit light.
6. A depth camera, comprising:
the optical transmit module of any of claims 1-5; and
and the receiving module is used for receiving the light emitted by the light emitting module.
7. The depth camera of claim 6, wherein the light emitting module is a vertical cavity surface emitting laser and the receiving module is an infrared camera.
8. The depth camera of claim 6, wherein the light emitting module is a dot matrix projector and the receiving module is an infrared camera.
9. An electronic device, comprising:
a housing, and
a depth camera as claimed in any one of claims 6 to 8, provided in the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021535827.XU CN212969799U (en) | 2020-07-29 | 2020-07-29 | Light emitting module, depth camera and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021535827.XU CN212969799U (en) | 2020-07-29 | 2020-07-29 | Light emitting module, depth camera and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212969799U true CN212969799U (en) | 2021-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021535827.XU Expired - Fee Related CN212969799U (en) | 2020-07-29 | 2020-07-29 | Light emitting module, depth camera and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212969799U (en) |
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2020
- 2020-07-29 CN CN202021535827.XU patent/CN212969799U/en not_active Expired - Fee Related
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Address after: 330096 No.699 Tianxiang North Avenue, Nanchang hi tech Industrial Development Zone, Nanchang City, Jiangxi Province Patentee after: Jiangxi OMS Microelectronics Co.,Ltd. Address before: 330096 Jiangxi Nanchang Nanchang hi tech Industrial Development Zone, east of six road, south of Tianxiang Avenue. Patentee before: OFilm Microelectronics Technology Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210413 |
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| CF01 | Termination of patent right due to non-payment of annual fee |