Integrated optical crosstalk prevention depth module and electronic equipment

Abstract

The utility model discloses an integrated optical crosstalk prevention depth module and electronic equipment. The integrated optical crosstalk prevention depth module comprises a shell; the projector is used for projecting infrared light; the receiver is used for receiving a reflection signal of the infrared light; the cover plate is positioned in front of the projector and the receiver and is fixed on the shell; wherein the cover plate comprises a first cover plate which is positioned in front of the projector and is fixed on the shell, and a second cover plate which is positioned in front of the projector and is fixed on the shell; the second cover plate is positioned in front of the receiver and is fixed on the shell; the first partition is made of a light-proof material and is positioned between the first cover plate and the second cover plate; the projector and the receiver are located on the same side face of the shell. The utility model reduces the optical crosstalk phenomenon, and has the advantages of convenience in assembly, low cost and good partition effect.

Description

Technical Field

[0001] The utility model relates to the technical field of depth cameras, and in particular to an integrated anti-cross-light depth module and electronic equipment. Background Art

[0002] A depth camera is a camera that can measure the distance from an object to the camera, also known as a 3D camera. Compared with traditional RGB color cameras, depth cameras can more accurately perceive the surrounding environment and changes, and have many application scenarios, such as unmanned driving, robots, smart homes, etc.

[0003] There are four main types of depth cameras: TOF (Time-of-Flight), structured-light, stereo, and passive vision.

[0004] TOF depth camera: calculates the distance by measuring the time it takes for a light pulse to be emitted and reflected back to the receiver. Representative technologies include phase and time, which determine depth information by calculating the phase difference or time difference of light reflection.

[0005] Structured light depth camera: The main hardware includes a projector and a camera. The projector actively emits IR infrared light that is invisible to the naked eye to the surface of the object being measured, and then uses one or more cameras to capture the structured light image of the object being measured, and sends the data to the computing unit, which calculates the position and depth information through the triangulation principle to achieve 3D reconstruction. There are many ways to project patterns, such as the phase shift method of sinusoidal stripes, binary coded Gray code, phase shift method + Gray code, etc.

[0006] Stereo vision depth camera: Use two cameras to shoot the same object from different angles, and then calculate the difference between the two images to obtain depth information.

[0007] Passive vision depth camera: obtains depth information by analyzing the reflected light from the surface of an object.

[0008] For active vision depth cameras, including TOF (Time-of-Flight), structured light, and binocular vision (Stereo), active light technology is used to emit active light to illuminate the target object, and generate depth information by receiving the reflected signal. The surface of the depth camera is usually covered with a transparent panel for light emission. However, due to the reflection, refraction and other effects of the transparent panel, the active light includes both the effect of the inside of the transparent panel on the light path and the effect of the surface of the transparent panel on the light path. Often, part of the light will directly shine on the receiver, causing the signal received by the receiver to be interfered with. This is the light crosstalk phenomenon. The light crosstalk phenomenon causes the depth camera's ability to obtain data in some areas to be greatly reduced, and even unable to obtain valid data. The prior art only considers the reflection of light on the surface of the transparent panel, but does not consider the transmission of light inside the transparent panel.

[0009] The disclosure of the above background technology content is only used to assist in understanding the utility model concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content

[0010] To this end, the utility model sets a first partition inside the cover so that the light emitted by the projector cannot enter the receiver through the cover, thereby reducing the cross-light phenomenon and having the advantages of easy assembly, low cost and good partition effect.

[0011] In a first aspect, the utility model provides an integrated anti-cross-light depth module, characterized in that it includes:

[0012] case;

[0013] A projector for projecting infrared light;

[0014] A receiver, used for receiving a reflection signal of the infrared light;

[0015] A cover plate, located in front of the projector and the receiver, and fixed to the housing;

[0016] Wherein, the cover plate comprises:

[0017] A first cover plate, located in front of the projector and fixed on the shell;

[0018] a second cover plate, located in front of the receiver and fixed to the housing;

[0019] A first partition, made of opaque material, located between the first cover plate and the second cover plate;

[0020] The projector and the receiver are located on the same side of the shell.

[0021] Optionally, the integrated anti-cross-light depth module is characterized in that there is a groove on the shell for fixing the cover plate.

[0022] Optionally, the integrated anti-cross-light depth module is characterized in that a light hole is also provided on the cover plate to allow infrared light to pass through.

[0023] Optionally, the integrated anti-cross-light depth module is characterized in that the first partition is connected to the first cover plate and the second cover plate on two opposite sides respectively.

[0024] Optionally, the integrated anti-cross-light depth module is characterized in that there is a second partition between the projector and the receiver.

[0025] Optionally, the integrated anti-cross-light depth module is characterized in that the first partition is connected to the second partition.

[0026] Optionally, the integrated anti-cross-light depth module is characterized in that the first cover plate is flush with the surface of the second cover plate.

[0027] Optionally, the integrated anti-cross-light depth module is characterized in that a sealing ring is provided under the cover plate.

[0028] Optionally, the integrated anti-cross-light depth module is characterized in that the area outside the light hole on the cover plate is opaque.

[0029] In a second aspect, the utility model provides an electronic device, characterized in that it comprises an integrated anti-cross-light depth module as described in any one of the above items.

[0030] Compared with the prior art, the utility model has the following beneficial effects:

[0031] The utility model sets a first partition inside the cover plate so that the light emitted by the projector cannot enter the receiver through the cover plate, thereby reducing the cross-light phenomenon. The utility model has the advantages of easy assembly, low cost and good partition effect.

[0032] In the utility model, a first partition is arranged inside the cover plate, so that the cover plate is an integral whole, the processing is more convenient, and the assembly cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work. By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the utility model will become more obvious:

[0034] Figure 1 This is a schematic diagram of the structure of an integrated anti-cross-light depth module in an embodiment of the utility model;

[0035] Figure 2 This is a schematic diagram of a partition in an embodiment of the utility model;

[0036] Figure 3 This is a schematic diagram of the structure of a robot in an embodiment of the utility model;

[0037] Figure 4 This is a schematic diagram of the structure of a smart phone in an embodiment of the utility model;

[0038] Figure 5 It is a structural schematic diagram of a payment terminal in an embodiment of the utility model.

[0039] 1- housing;

[0040] 2- projector;

[0041] 3- Receiver;

[0042] 4- first cover plate;

[0043] 5- second cover plate;

[0044] 6-groove;

[0045] 8- First partition;

[0046] 9- Second partition;

[0047] 10- Sealing ring;

[0048] 11- light hole;

[0049] 601-depth camera;

[0050] 602-Robot body;

[0051] 603-display screen;

[0052] 701- mobile phone body;

[0053] 702-depth camera;

[0054] 510-integrated anti-cross-light depth module;

[0055] 520 - receiver;

[0056] 530 - processor;

[0057] 540-input interface;

[0058] 550-display screen;

[0059] 560-Scanning device; DETAILED DESCRIPTION

[0060] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the utility model. These all fall within the scope of protection of the utility model.

[0061] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here, for example, can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0062] An integrated anti-cross-light depth module provided in an embodiment of the utility model is intended to solve the problems existing in the prior art.

[0063] The following specific embodiments are used to describe in detail the technical solution of the utility model and how the technical solution of the present application solves the above technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the utility model will be described below in conjunction with the accompanying drawings.

[0064] The utility model sets a first partition inside the cover plate so that the light emitted by the projector cannot enter the receiver through the cover plate, thereby reducing the cross-light phenomenon. The utility model has the advantages of easy assembly, low cost and good partition effect.

[0065] Figure 1 Schematic diagram of the structure of an integrated anti-cross-light depth module in the embodiment of the utility model. Figure 1 As shown, an integrated anti-cross-light depth module in the embodiment of the utility model includes:

[0066] Shell 1.

[0067] Specifically, the housing can be formed in one piece or assembled by splicing. The housing fixes and supports other components.

[0068] The projector 2 is used for projecting infrared light.

[0069] Specifically, the projector can be a structured light projector or a floodlight projector. The number of projectors can be one or more. In order to ensure that the signal of the target object can be stably obtained and reduce the interference of external light, the projector projects infrared light. The projector is located on one side of the shell and can project light out.

[0070] The receiver 3 is used to receive the reflected signal of the infrared light.

[0071] Specifically, the type of the receiver matches the projector. For example, if the projector is a structured light projector, the receiver is a structured light receiver; if the projector is a flood light projector, the receiver is a TOF receiver. The projector and the receiver are located on both sides of the module. The receiver is located on one side of the housing and can receive light. The projector and the receiver are located on the same side of the housing.

[0072] The cover plate is located in front of the projector and the receiver and is fixed on the shell.

[0073] Specifically, the cover plate is used to protect the components in the depth module from damage by external forces. The cover plate has strong hardness, can withstand a certain degree of impact, and can prevent various types of damage such as scratches. The cover plate is not a complete whole, but consists of three parts: the first cover plate, the second cover plate and the first partition. That is, the first cover plate, the second cover plate and the first partition form an integrated cover plate.

[0074] The first cover plate 4 is located in front of the projector and is fixed on the shell.

[0075] Specifically, the first cover plate is used to protect the projector and prevent the projector from being damaged by external forces. The first cover plate can be made of various light-transmitting materials such as glass and plastic. The light-transmitting material in this embodiment refers to a material that can transmit light from the projector. For example, if the projector emits infrared light, the first cover plate can at least transmit infrared light, and of course it can also transmit white light. Therefore, the first cover plate can also be made of a material that can only transmit infrared light, such as germanium material, infrared filter, fused quartz, BK7 and sapphire.

[0076] The second cover plate 5 is located in front of the receiver and is fixed on the shell.

[0077] Specifically, the first cover plate and the second cover plate have the same function, and are both used to protect other components. The first cover plate is used to protect the projector, and the second cover plate is used to protect the receiver. Light passes through the second cover plate and enters the receiver. The material of the second cover plate can be the same as or different from that of the first cover plate.

[0078] The first partition 8 is made of opaque material and is located between the first cover plate and the second cover plate. The first partition is connected to the first cover plate and the second cover plate on opposite sides respectively. The first partition can be connected to the first cover plate and the second cover plate by glue or the like. The first partition is made of opaque material and is used to block the light path between the first cover plate and the second cover plate to prevent light from crossing between the first cover plate and the second cover plate. Opaque in this embodiment means that infrared light cannot penetrate, thereby blocking the path of infrared light emitted from the projector to enter the receiver through the cover plate. The surface of the first partition is flush with the surfaces of the first cover plate and the second cover plate.

[0079] In some embodiments, the first partition, the first cover plate and the second cover plate can all transmit visible light. The first partition cannot transmit infrared light, but can transmit visible light, so that the cover plate is transparent as a whole, which is more beautiful.

[0080] In some embodiments, the housing is provided with a groove 6 for fixing the cover. The projector and the receiver are located in the groove, and the cover is located on the groove. The projector is arranged outward so that the infrared light emitted by the projector can vertically penetrate the first cover. The first cover is arranged perpendicular to the optical path of the projector. The cover can be fixed by any means such as glue, snaps, etc., as long as the cover can be fixed to the groove. The size of the groove is adapted to the cover. When there are other light projection units in the depth module in addition to the projector, such as a fill light, a distance sensor, a white light, etc., the first cover is used to cover the projector and other light projection units at the same time to simplify the installation process, and to keep the light projection and reception separated to prevent cross-light. The material of the second cover can be the same as or different from that of the first cover. The specific material selection of the first cover and the second cover can be selected comprehensively according to the various parts in the depth module, and this embodiment is not limited. The second cover is parallel to the direction of the receiver so that the light vertically incident on the receiver also vertically penetrates the second cover, thereby reducing the loss. The installation direction of the projector and the receiver is the same. When there are other light receiving units in addition to the receiver in the depth module, such as a second receiver, a visible light receiver, etc., a second cover is used to cover the receiver and other light receiving units at the same time to simplify the installation process and keep the projection and reception of light separate to prevent cross-light.

[0081] In some embodiments, the cover plate is further provided with a light hole 11 to allow infrared light to pass through. The size of the light hole is such that the light can pass through. The light hole is located on the cover plate. The number of the light holes is at least two. The shape of the light hole is designed according to the light path, such as round, square, etc.

[0082] In some embodiments, Figure 2 As shown, there is a second partition 9 between the projector and the receiver. The second partition is located below the first cover plate and the second cover plate, and is used to isolate the light path below the first cover plate and the second cover plate. If there is no second partition, the light emitted by the projector can enter the receiver through the gap in the middle, the reflection of the first cover plate and the second cover plate, etc., thereby causing cross-light. The second partition can be directly connected to the first partition to better isolate the light path. The second partition can be made of the same material as the shell, or it can be a soft material such as light-shielding foam.

[0083] In some embodiments, the first cover plate is flush with the surface of the second cover plate. The projector and the receiver may not be flush, and are set according to specific functions. For example, the setting of the receiver can affect parameters such as FOV, and is also related to the internal setting of the depth module, such as improving the integration. When the receiver is not flush with the projector, by controlling the first distance between the first cover plate and the projector and the second distance between the second cover plate and the receiver, the surface of the first cover plate and the second cover plate can be made flush, thereby making the surface of the depth module neat. The surface of the first cover plate and the second cover plate can also be made flush by controlling the thickness of the first cover plate and the second cover plate.

[0084] In some embodiments, both the first cover plate and the second cover plate can allow infrared light to pass through. The first cover plate and the second cover plate can be made of light-transmitting materials. The first cover plate and the second cover plate are provided with an opaque film in areas where light is not required to pass, so as to reduce the propagation of light in the first cover plate and the second cover plate and reduce stray light interference.

[0085] In some embodiments, the first cover plate and the second cover plate are only light-transmissive in the light path, and other areas are opaque. By setting other areas to be opaque, on the one hand, the light path can be better controlled, and on the other hand, the depth module can be made more beautiful. The upper and lower surfaces of other areas of the first cover plate and the second cover plate are opaque.

[0086] In some embodiments, a sealing ring 10 is provided under the cover plate. The sealing ring is provided around the edge of the cover plate. The size of the sealing ring matches the size of the cover plate. In this embodiment, by providing the sealing ring, the waterproof capability of the depth module can be greatly improved.

[0087] The utility model also provides an electronic device, which includes the integrated anti-cross-light depth module provided by any of the above embodiments, and the electronic device can be a mobile phone, a tablet computer, a payment device, a drone, a robot, a digital camera, etc. In this embodiment, the first cover plate and the second cover plate are respectively placed on the projector and the receiver, so that the light emitted by the projector cannot enter the receiver through the cover plate, which has the advantages of low cost and good partition effect.

[0088] Figure 3 The figure is a schematic diagram of the structure of a robot in an embodiment of the utility model. Figure 3 The robot shown in the figure includes a depth camera 601, a robot body 602 and a display screen 603. The depth camera 601 includes the integrated anti-cross-light depth module described in any of the aforementioned embodiments. The depth camera 601 can obtain the scene in front of the robot, so as to obtain three-dimensional information. Usually, the depth camera 601 also includes an RGB camera, which can obtain an RGB image, so that it can be combined with the depth image to generate an RGBD image. The robot body 602 can select different functions according to different robot types. For example, a food delivery robot can have a tray, a bracket, a driving wheel, etc.; a welcoming robot can have a driving wheel, a human body shape, etc. The display screen 603 is used to display information and interact with the user. The display screen 603 can be either unidirectional or bidirectional. Due to the use of a highly integrated integrated anti-cross-light depth module, the robot can accommodate more sensors at the same size, thereby having better environmental perception capabilities. Of course, the robot can also reduce its size to adapt to more scenes with strict size requirements. The integrated anti-cross-light depth module can also use the monitoring range to set different trigger distances to achieve the functions of automatically starting the integrated anti-cross-light depth module at a close distance and shutting down the integrated anti-cross-light depth module at a long distance, thereby saving energy consumption.

[0089] Figure 4It is a structural schematic diagram of a smart phone in an embodiment of the utility model. The smart phone includes a mobile phone body 701 and a depth camera 702. The depth camera 702 includes the integrated anti-cross-light depth module described in any of the aforementioned embodiments. The mobile phone body 701 includes a display screen and a shell. The depth camera 702 is arranged behind the display screen to increase the screen-to-body ratio. The display screen can be made by digging holes so that the light of the depth camera 702 can pass through better and collect data. At this time, the processing technology requirements for the display screen are relatively high, and the whole display screen can be dug or two display screens can be spliced. In some embodiments, through the reasonable design of the laser emitter, the laser can penetrate the display screen, so that the display screen no longer needs to dig holes, so that the screen-to-body ratio reaches the theoretical maximum value. At this time, the emission power of the structured light is required to be large, and it can directly penetrate the display screen. Due to the use of a highly integrated integrated anti-cross-light depth module, the mobile phone space is better utilized and the performance of the mobile phone is improved.

[0090] Figure 5 Schematic diagram of the structure of a payment terminal in the embodiment of the utility model. Figure 5 As shown, a payment terminal in an embodiment of the utility model includes:

[0091] The integrated anti-cross-light depth module 510 is used to obtain a depth image of a target object.

[0092] The processor 530 is used to detect the reflection signal of the target object, send the detection result to the server, and confirm the payment status according to the result returned by the server.

[0093] The input interface 540 is used to obtain the amount to be paid.

[0094] Display screen 550 is used to display the information to be paid and the information captured by the RGB camera.

[0095] The scanning device 560 is used to scan the commodity barcode to obtain the commodity price and quantity information, thereby determining the amount to be paid.

[0096] Specifically, in order to improve the convenience of the terminal, a scanning device 560 can be provided, which is particularly convenient for self-service checkout terminals. Self-service checkout terminals are generally large, with a large height difference. If users are asked to pull up the goods for scanning, it will be inconvenient, especially when users purchase heavy goods. Therefore, providing a scanning device and placing it at the bottom of the payment terminal can greatly improve convenience.

[0097] This embodiment uses an integrated anti-cross-light depth module to improve the integration of the device, which is beneficial to reducing the size of the payment terminal and making it more convenient for users to operate.

[0098] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the utility model. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

[0099] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. An integrated anti-cross-light depth module, characterized in that: include: case; A projector for projecting infrared light; A receiver, used for receiving a reflected signal of the infrared light; A cover plate, located in front of the projector and the receiver, and fixed to the housing; Wherein, the cover plate comprises: A first cover plate, located in front of the projector and fixed on the shell; a second cover plate, located in front of the receiver and fixed to the housing; A first partition, made of opaque material, located between the first cover plate and the second cover plate; The projector and the receiver are located on the same side of the shell.

2. The integrated anti-cross-light depth module according to claim 1, characterized in that: The housing is provided with a groove for fixing the cover plate.

3. The integrated anti-cross-light depth module according to claim 1, characterized in that: The cover plate is also provided with a light hole to allow infrared light to pass through.

4. The integrated anti-cross-light depth module according to claim 1, characterized in that: The first partition is connected to the first cover plate and the second cover plate at two opposite sides respectively.

5. The integrated anti-cross-light depth module according to claim 1, characterized in that: There is a second partition between the projector and the receiver.

6. The integrated anti-cross-light depth module according to claim 5, characterized in that: The first partition is connected to the second partition.

7. The integrated anti-cross-light depth module according to claim 1, characterized in that: The first cover plate is flush with the second cover plate surface.

8. The integrated anti-cross-light depth module according to claim 1, characterized in that: A sealing ring is arranged under the cover plate.

9. The integrated anti-cross-light depth module according to claim 3, characterized in that: The area outside the light hole on the cover plate is opaque.

10. An electronic device, characterized in that: An integrated anti-cross-light depth module comprising any one of claims 1 to 9.

Images