Light emitting module, depth camera, electronic device, and anomaly detection method

Abstract

The application provides a light emitting module, a depth camera, an electronic device and an abnormality detection method, and belongs to the technical field of electronic devices. The light emitting module comprises a support structure, a substrate, a light emitter, a first photodetector and a light homogenizing device; the support structure comprises an enclosing frame and a mounting plane, the enclosing frame encloses the upper surface of the substrate along the edge of the upper surface of the substrate, and the light homogenizing device is mounted on the support component of the mounting plane; the upper surface of the substrate is provided with the light emitter and the first photodetector, the light emitter is located directly below the light transmission window, and the first photodetector is located directly below the shielding component; when an external light signal propagates to the first photodetector along a light propagation path, the shielding component reflects the external light signal, so that the external light signal cannot propagate to the first photodetector. The first photodetector is shielded by the shielding component, so that the external light signal cannot propagate to the first photodetector, and thus an abnormal light homogenizing device can be detected.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and in particular to a light emission module, a depth camera, an electronic device, and an anomaly detection method. Background Technology

[0002] With the advancement of technology, electronic devices use built-in depth cameras to capture 3D (Three-Dimensional) information of real-world scenes, such as capturing a user's 3D facial image for 3D facial recognition, enabling functions like facial unlocking and facial payment. A depth camera can include a light-emitting module and a light-receiving module. During 3D facial recognition, the light spot emitted by the light-emitting module needs to cover the face. If the light-shielding device is damaged or detached, the light signal emitted by the light-emitting module will directly shine into the eyes, causing eye fatigue, damage, and other adverse effects. Therefore, it is necessary to perform anomaly detection on the light-shielding device of the light-emitting module.

[0003] Currently, the main method is to use a photoelectric detector (PD) to receive the laser signal reflected by the homogenizing device, convert the received reflected light signal into a detection photocurrent, and then compare the detection photocurrent with the reference photocurrent when the homogenizing device is in good condition. If the detection photocurrent is less than the reference photocurrent, it can be determined that the homogenizing device is damaged or detached.

[0004] However, the light emitting module is usually equipped with a glass cover plate, which also reflects the light signal. If the light homogenizing device is damaged or detached, although the laser signal reflected by the light homogenizing device will be weakened, the laser signal reflected by the glass cover plate or the transmitted ambient light signal will be enhanced. As a result, the detection photocurrent obtained by the photodetector from the received light signal will not be significantly reduced compared with the reference photocurrent. Therefore, abnormalities such as damage or detachment of the light homogenizing device cannot be detected. Summary of the Invention

[0005] This application provides a light emission module, a depth camera, an electronic device, and an anomaly detection method, capable of accurately detecting anomalies such as damage or detachment of light-diffusing devices. The technical solution is as follows:

[0006] In a first aspect, a light emitting module is provided, the light emitting module comprising: a support structure, a substrate, a light emitter, a first photodetector, and a light homogenizing device;

[0007] The support structure includes a surrounding frame and a mounting plane. The surrounding frame surrounds the upper surface of the substrate along the edge of the upper surface of the substrate. The mounting plane is a plane parallel to the upper surface of the substrate. The mounting plane includes a support member extending from the four side walls of the surrounding frame, a light-transmitting window, and a shielding member extending from any side of the support member. The light-diffusing device is mounted on the support member.

[0008] The light emitter is mounted on the upper surface of the substrate. The light emitter is located directly below the light-transmitting window, and the light-emitting surface of the light emitter faces the light-uniforming device. The laser signal emitted by the light emitter is transmitted to the light-uniforming device through the light-transmitting window, so that the light-uniforming device performs light-uniforming processing on the transmitted laser signal.

[0009] The first photodetector is also mounted on the upper surface of the substrate. The first photodetector is located directly below the shielding component, and the distance between the first photodetector and the light emission center of the light emitter is within a first distance range. The first distance range is the range within which the first photodetector can receive the laser signal reflected by the light homogenizing device. When an external light signal propagates along the light propagation path to the first photodetector, the external light signal is reflected by the shielding component and cannot propagate to the first photodetector, so that the first photodetector can detect the abnormality of the light homogenizing device based on the laser signal reflected by the light homogenizing device.

[0010] In a first possible implementation of the first aspect, the minimum distance in the first distance range is the first distance, which is determined according to the size of the light-transmitting window.

[0011] In a second possible implementation of the first aspect, the maximum distance in the first distance range is the second distance, which is determined based on the size of the light-transmitting window, the beam divergence angle of the light emitter, the distance between the light emitter and the light-diffusing device, the thickness of the blocking component, and the distance between the first photodetector and the blocking component.

[0012] In a third possible implementation of the first aspect, the light emitting module further includes a second photodetector mounted on the upper surface of the substrate and not directly below the blocking member, the second photodetector being used to detect the blocking state of the light emitting module.

[0013] In a fourth possible implementation of the first aspect, the light emitting module further includes a control chip electrically connected to the first photodetector, the second photodetector and the light emitter, and the control chip is used to control the laser signal emitted by the light emitter according to the detection result of the first photodetector or the detection result of the second photodetector.

[0014] In a fifth possible implementation of the first aspect, the substrate is a ceramic substrate.

[0015] In the sixth possible implementation of the first aspect, the laser source within the light emitter is a surface light source.

[0016] Secondly, an anomaly detection method is provided, the method being applied to the optical emitting module described in the first aspect, the method comprising:

[0017] The optical emitter emits a first laser signal;

[0018] The first photodetector receives the first reflected light signal and converts the first reflected light signal into a first detection photocurrent. The first reflected light signal is the light signal obtained by the homogenizing device reflecting the first laser signal.

[0019] When the first detected photocurrent is less than the first reference photocurrent, and the difference between the first and the first reference photocurrent exceeds a first threshold, the first photodetector determines that the homogenizing device is abnormal. The first reference photocurrent is the photocurrent converted by the first photodetector when the homogenizing device is in good condition.

[0020] In a first possible implementation of the second aspect, after the first photodetector determines that the homogenizing device is malfunctioning, it further includes:

[0021] The first photodetector sends a first notification message to the control chip;

[0022] Upon receiving the first notification message, the control chip sends a first control command to the light transmitter, which is used to control the light transmitter to stop emitting the first laser signal.

[0023] In a second possible implementation of the second aspect, the method further includes:

[0024] When the difference between the first detected photocurrent and the first reference photocurrent does not exceed the first threshold, the first photodetector sends a second notification message to the control chip.

[0025] Upon receiving the second notification message, the control chip sends a second control command to the optical transmitter. The second control command is used to control the optical transmitter to emit a second laser signal, the power of which is greater than the power of the first laser signal.

[0026] In a third possible implementation of the second aspect, after the control chip sends the second control command to the light transmitter, it further includes:

[0027] During the process of the light emitter emitting the second laser signal, the second photodetector receives the second reflected light signal and converts the second reflected light signal into a second detection photocurrent.

[0028] When the second detected photocurrent is greater than the second reference photocurrent, and the difference between the two photocurrents exceeds the second threshold, the second photodetector determines that the light emitting module is in a blocked state. The second reference photocurrent is the photocurrent converted by the second photodetector when the light emitting module is not in a blocked state.

[0029] In a fourth possible implementation of the second aspect, after the second photodetector determines that the light emitting module is in a blocked state, it further includes:

[0030] The second photodetector sends a third notification message to the control chip;

[0031] Upon receiving the third notification message, the control chip sends a third control command to the optical transmitter, which controls the optical transmitter to stop emitting the second laser signal.

[0032] Thirdly, a depth camera is provided, the depth camera including a light emitting module and a light receiving module, the light emitting module and the light receiving module being electrically connected;

[0033] The light emitting module, as described in the first aspect, is used to generate and emit uniform light signals.

[0034] The light receiving module is used to receive the reflected light signal obtained by the uniform light signal being reflected by the object.

[0035] Fourthly, an electronic device is provided, the electronic device including a housing, a display screen and a depth camera, the depth camera being disposed between the housing and the display screen, the depth camera being as described in the third aspect.

[0036] In a first possible implementation of the fourth aspect, the display screen includes a glass cover, with the light-emitting surface of the light-emitting module in the depth camera facing the glass cover.

[0037] In a second possible implementation of the fourth aspect, the housing includes a glass cover plate, with the light-emitting surface of the light-emitting module in the depth camera facing the glass cover plate.

[0038] The beneficial effects of the technical solutions provided in this application are:

[0039] This application provides a novel light-emitting module. The support structure of this module includes a surrounding frame and a mounting plane. The surrounding frame encloses a substrate on which a light emitter and a first photodetector are mounted, forming a cavity structure to protect the light emitter and the first photodetector. The mounting plane includes not only support components and a light-transmitting window but also a shielding component. The first photodetector is located directly below the shielding component and is completely blocked by it. When an external light signal propagates along its path towards the first photodetector, it cannot reach the detector due to the shielding component and is reflected instead. Thus, the first photodetector does not receive the external light signal but only the laser signal reflected by the homogenizing device. When the homogenizing device is damaged or detached, the reflected laser signal weakens, and the reflected light signal received by the first photodetector weakens or even disappears. Consequently, the converted detection photocurrent decreases significantly, allowing for accurate detection of abnormalities in the homogenizing device based on changes in the detection photocurrent.

[0040] Furthermore, the light emitting module provided in this application embodiment also includes a second photodetector. This second photodetector is mounted on the upper surface of the substrate and is not located directly below the obstructing component. This second photodetector can detect the obstruction status of the light emitting module. When the light emitting module is obstructed, the homogenized light signal processed by the homogenizing device cannot propagate out and will be reflected back into the light emitting module. The first photodetector will not receive this light signal due to the obstruction of the obstructing component, while the second photodetector, not located directly below the obstructing component, can receive the light signal. Because the received light signal is enhanced, the corresponding detection photocurrent increases, thereby detecting the obstruction of the light emitting module. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of a light-emitting module provided by related technologies;

[0043] Figure 2This is a schematic diagram of another optical emission module provided by related technologies;

[0044] Figure 3 This is a schematic diagram of the structure of a light emitting module provided in an embodiment of this application;

[0045] Figure 4 This is a schematic diagram of a support structure provided in an embodiment of this application;

[0046] Figure 5 This is a top view of an installation plane provided in an embodiment of this application;

[0047] Figure 6 This is a cross-sectional schematic diagram of a light emitting module provided in an embodiment of this application in the X-axis direction;

[0048] Figure 7 This is a cross-sectional schematic diagram of a light emitting module in the Y-axis direction provided in an embodiment of this application;

[0049] Figure 8 This is a schematic diagram of another optical emission module provided in an embodiment of this application;

[0050] Figure 9 This is a flowchart of an anomaly detection method provided in an embodiment of this application;

[0051] Figure 10 This is a schematic diagram illustrating an anomaly detection process using the optical emission module provided in the embodiments of this application;

[0052] Figure 11 This is a schematic diagram of another anomaly detection process using the optical emission module provided in this application embodiment;

[0053] Figure 12 This is a flowchart of another anomaly detection method provided in the embodiments of this application;

[0054] Figure 13 This is a schematic diagram of another anomaly detection process using the optical emission module provided in this application embodiment;

[0055] Figure 14 This is a schematic diagram of the structure of a depth camera provided in an embodiment of this application;

[0056] Figure 15 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application;

[0057] Figure 16 This is a schematic diagram of the structure of another electronic device provided in an embodiment of this application. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0059] It is understood that the terms "each," "multiple," and "any" used in the embodiments of this application, etc., mean that "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the corresponding multiples. For example, multiple words include 10 words, and "each word" refers to each of the 10 words, while "any word" refers to any one of the 10 words.

[0060] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation portals are provided for users to choose to authorize or refuse.

[0061] Depth cameras employing technologies such as structured light and Time-of-Flight (TOF) can acquire 3D information of real-world target scenes, supporting 3D face recognition, target depth measurement, and other functions, thereby enabling face unlocking, face payment, target detection, and focus tracking. A depth camera consists of a light emitting module and a light receiving module. For depth cameras used in 3D face recognition and other functions, the laser signal emitted by the light emitting module needs to cover the face. If the homogenizing device in the light emitting module detaches or is damaged, the emitted laser signal will directly shine into the eyes, causing eye fatigue and damage. To detect abnormalities in the homogenizing device within the light emitting module, the current mainstream solution is to use a photodetector. Specifically, the detection photocurrent (PD value) formed by the laser signal reflected by the homogenizing device can be measured to detect whether the homogenizing device is damaged or detached. If the homogenizing device is damaged or detached, the laser signal reflected by the homogenizing device will weaken, the optical signal received by the photodetector will weaken, and correspondingly, the detection photocurrent converted by the photodetector will also weaken. Based on the above principle, the detection photocurrent can be compared with the reference photocurrent when the homogenizing device is in good condition, and if the detection photocurrent is less than the reference photocurrent, it can be determined that the homogenizing device is damaged or detached.

[0062] The aforementioned detection method using photodetectors has advantages such as simple structure and convenience. However, in actual use, depth cameras may encounter multi-path interference problems, leading to inaccurate detection results or even failing to detect light-diffusing devices with abnormalities such as damage or detachment. This multi-path interference problem may originate from within or outside the light-emitting module. Specifically, if a glass cover is installed on the outside of the light emitting module, when the homogenizing device is damaged or detached, although the laser signal reflected by the homogenizing device will be weakened, the glass cover will reflect part of the laser signal back into the light emitting module. This means the light signal received by the photodetector will not be significantly reduced, and the detection photocurrent converted from the received light signal will not be significantly reduced compared to the reference photocurrent. Therefore, the detection photocurrent may not be sufficient to detect damage or detachment of the homogenizing device. Conversely, if no glass cover is installed on the outside of the light emitting module, when the homogenizing device is damaged or detached, although the laser signal reflected by the homogenizing device will be weakened, ambient light will propagate into the light emitting module. This means the light signal received by the photodetector will not be significantly reduced, and the detection photocurrent converted from the received light signal will not be significantly reduced compared to the reference photocurrent. Again, the detection photocurrent may not be sufficient to detect damage or detachment of the homogenizing device.

[0063] Regarding the two situations mentioned above, the following will combine... Figure 1 and Figure 2 To elaborate further. Figure 1 The external surface of the optical emission module is covered with a glass cover. Figure 1 The light-diffusing device shown in Figure (a) is in good condition. Figure 1 The homogenizing device shown in Figure (b) has detached. See also Figure 1 In Figure (a), the LD emits a laser signal, a portion of which is reflected by a homogenizing device to the PD. The PD receives the reflected light signal and converts it into a detection photocurrent, i.e., the standard PD value. (See also...) Figure 1 As shown in Figure (b), when the homogenizing device falls off, although the homogenizing device no longer reflects the laser signal, the glass cover will reflect the laser signal to the PD. The PD receives the reflected light signal reflected by the glass cover and converts the received reflected light signal into a detection photocurrent. Due to the influence of the reflected light signal from the glass cover, the magnitude of the detection photocurrent converted by the PD is uncertain compared with the reference photocurrent when the light emitting module is in good condition. At this time, it may not be possible to detect the detachment of the homogenizing device, resulting in inaccurate detection results. Figure 2 The external glass cover of the optical emission module is not installed. Figure 2 The light-diffusing device shown in Figure (a) is in good condition. Figure 2 The homogenizing device shown in Figure (b) has detached. See also Figure 2In Figure (a), when the homogenizing device is in good working order, the LD emits a laser signal. A portion of the laser signal is reflected by the homogenizing device to the PD. The PD receives the reflected laser signal and converts it into a detection photocurrent, i.e., the standard PD value. (See also...) Figure 2 As shown in Figure (b), when the homogenizing device falls off, although the homogenizing device no longer reflects the laser signal, the light signal from the external environment can propagate into the optical emitting module. Affected by the light signal from the external environment, the magnitude of the detection photocurrent obtained by PD conversion is uncertain compared with the reference photocurrent when the optical emitting module is in good condition. At this time, it may not be possible to identify the detachment of the homogenizing device of the optical emitting module, resulting in inaccurate detection results.

[0064] Through the above Figure 1 and Figure 2 It can be seen that when related technologies use photodiodes (PDs) to detect abnormal conditions such as damage or detachment of homogenizing devices, the detection results are inaccurate due to multi-path interference, leading to the risk of misjudgment or even missed detection. To improve the accuracy of homogenizing device detection results, this application provides a light emission module. A shielding component is positioned directly above the photodetector in this light emission module. This shielding component blocks the photodetector, preventing reflected light signals from the glass cover and light signals from the external environment from reaching the photodetector. This solves the problem of risk detection failure caused by multi-path interference and can effectively identify whether the homogenizing device of the light emission module is in a risky or abnormal state such as detachment or damage, thereby improving the safety of depth camera use.

[0065] This application provides an embodiment of an optical emission module, see [link to documentation]. Figure 3 The light emitting module includes: a substrate 301, a support structure 302, a light emitter 303, a first photodetector 304, and a light homogenizing device 305. The substrate 301 is used to mount and support optical components; the substrate 301 can be a ceramic substrate, etc. The support structure 302 protects the optical components inside the light emitting module, such as the light emitter 303 and the first photodetector 304. The light emitter 303 contains a laser that emits laser signals. This laser is a surface light source and can be a VCSEL (Vertical-Cavity Surface-Emitting Laser), etc. The first photodetector 304 receives the laser signal reflected by the light homogenizing device and converts the received reflected light signal into a detection photocurrent. By comparing this detection photocurrent with a reference photocurrent, it can detect whether the light homogenizing device is damaged or detached. The light homogenizing device 305 homogenizes the transmitted laser signal to obtain a homogenized signal, which is used to acquire a 3D image of an object.

[0066] See Figure 4 The support structure 302 includes a surrounding frame 3021 and a mounting plane 3022. The surrounding frame 3021 surrounds the upper surface of the substrate 301 along its edge, thus forming a cavity structure. The light emitter 303 and the first photodetector 304 are located within this cavity. This not only prevents the laser signal emitted by the light emitter 303 from diverging but also protects the light emitter 303 and the first photodetector 304. See also... Figure 4 The mounting plane 3022 is a plane parallel to the upper surface of the substrate 301, and its dimensions can be the same as those of the substrate 301. To better illustrate the specific structure of the mounting plane 3022, Figure 5 A top view of the mounting plane 3022 is shown; see [link / reference]. Figure 5 The mounting plane 3022 includes a support member 30221 extending from the four side walls of the surrounding frame 3021, a light-transmitting window 30222, and a shielding member 30223 extending from any side of the support member 30221. A light-diffusing device 305 is mounted on the support member 30221 to support the light-diffusing device 305.

[0067] A light emitter 303 is mounted on the upper surface of substrate 301. The light-emitting surface of the light emitter 303 faces the homogenizing device 305, so that the laser signal emitted by the light emitter 303 can propagate to the homogenizing device 305. Since the surrounding frame of the support structure cannot transmit the laser signal, in order to emit the laser signal, the light emitter 303 can be located directly below the light-transmitting window 30222. When the light emitter 303 emits the laser signal, the light-transmitting window 30222 transmits the laser signal emitted by the light emitter 303 to the homogenizing device 305. After receiving the laser signal, the homogenizing device 305 homogenizes the transmitted laser signal to obtain a homogenized signal.

[0068] A first photodetector 304 is also mounted on the upper surface of substrate 301. This first photodetector 304 is located directly below the blocking component 30223, and the distance between the first photodetector 304 and the light-emitting center of the light emitter 303 is within a first distance range. This first distance range is the range within which the first photodetector 304 can receive the laser signal reflected by the homogenizing device 305. When an external light signal propagates along the light propagation path towards the first photodetector 304, the external light signal is reflected by the blocking component 30223 and cannot propagate to the first photodetector 304. Because the interference of the external light signal is isolated, the first photodetector 304 can detect abnormalities in the homogenizing device 305 based on the laser signal reflected by the homogenizing device 305, thus improving the accuracy of the detection results. It should be noted that the external light signal refers to the light signal propagating into the light emitting module, including light signals from the external environment and reflected signals obtained by reflecting the laser signal emitted by the light emitter.

[0069] In this embodiment, the minimum distance within the first distance range is the first distance, which can be determined based on the size of the light-transmitting window 30222. The maximum distance within the first distance range is the second distance, which is determined based on the size of the light-transmitting window 30222, the beam divergence angle of the light emitter 303, the distance between the light emitter 303 and the light-diffusing device 305, the thickness of the blocking component 30223, and the distance between the first photodetector 304 and the blocking component 30223.

[0070] The size of the light-transmitting window 30222 refers to the distance between the center of the light emitter 303 and the blocking component 30223. The beam divergence angle of the light emitter 303 is a device parameter of the laser and is determined by the properties of the laser itself. Considering that the light source inside the light emitter 303 is a surface light source, it will emit laser signals into the plane containing the XY axes. The laser signal reflected by the homogenizing device 305 received by the first photodetector 304 originates from the plane containing the XY axes. Therefore, when the first photodetector 304 is blocked by the blocking component 30223, it is necessary to consider the first distance range between the first photodetector 304 and the light emitter 303 in the X-axis direction and the first distance range between the first photodetector 304 and the light emitter 303 in the Y-axis direction. The process of determining the first distance range in the above two cases will be described below.

[0071] When calculating the first distance range between the first photodetector 304 and the light emitter 303 in the X-axis direction, a cross-sectional view of the light emitting module along the X-axis direction can be obtained, and the calculation can then be performed based on this cross-sectional view. See [link to relevant documentation]. Figure 6 , Figure 6 Figure (a) is a top view of the light-emitting module, with the AA direction being the X-axis section direction. Figure 6Figure (b) in the diagram is a cross-sectional view of the light-emitting module along the X-axis. See also... Figure 6 In Figure (b), the size of the light-transmitting window 30222 of the light-emitting module is Dx, and the beam divergence angle of the light emitter 303 is... The distance between the light emitter 303 and the light homogenizing device 305 is H, the thickness of the blocking component 30223 is t, and the distance between the first photodetector 304 and the blocking component 30223 is L. To prevent external light signals from propagating to the first photodetector 304, the closest distance between the light-emitting centers of the first photodetector 304 and the light emitter 303 in the X-axis direction is the size Dx of the light-transmitting window 30222, that is, the first distance is Dx, at which point the first photodetector 304 is located at the edge of the blocking component 30223. The farthest distance between the first photodetector 304 and the light-emitting centers of the light emitter 303 is the distance at which the first photodetector 304 can just receive the laser signal reflected by the light homogenizing device 305, that is, the second distance. At this point, if the first photodetector 304 moves further away from the light emitter 303, it will not be able to receive the laser signal reflected by the light homogenizing device 305. The calculation process for the second distance is as follows: Let Sx be the closest distance between the intersection point of the laser signal emitted by the light emitter 303 on the homogenizing device 305 and the blocking component 30223. Then, based on the distance H between the light emitter 303 and the homogenizing device 305, and the beam divergence angle of the light emitter 303... It can be calculated Let θx be the angle between the reflected ray and the blocking component 30223 after the farthest beam emitted by the light emitter 303 is reflected by the light homogenizer 305. Then, based on Sx and t, the angle can be calculated using trigonometric relationships. Let M be the distance between the first photodetector 304 and the blocking component 30223 along the Y-axis. Based on the distance L between the first photodetector 304 and the blocking component 30223 and tanθx, we can use trigonometric relationships to know that tanθx = L / M. Therefore, the second distance can be derived as

[0072] When calculating the first distance range between the first photodetector 304 and the light emitter 303 in the Y-axis direction, a cross-sectional view of the light emitting module along the Y-axis can be obtained, and the calculation can then be performed based on this cross-sectional view. See [link to relevant documentation]. Figure 7 , Figure 7 Figure (a) is a top view of the light-emitting module, with the BB direction representing the Y-axis section. Figure 7 Figure (b) in the diagram is a cross-sectional view of the light-emitting module along the Y-axis. See also... Figure 7 In Figure (b), the size of the light-transmitting window 30222 of the light-emitting module is Dy, and the beam divergence angle of the light emitter 303 is... The distance between the light emitter 303 and the light homogenizing device 305 is H, the thickness of the blocking component 30223 is t, and the distance between the first photodetector 304 and the blocking component 30223 is L. To prevent external light signals from propagating to the first photodetector 304, the closest distance between the light-emitting centers of the first photodetector 304 and the light emitter 303 in the Y-axis direction is the size Dy of the light-transmitting window 30222, that is, the first distance is Dy, at which point the first photodetector 304 is located at the edge of the blocking component 30223. The farthest distance between the first photodetector 304 and the light-emitting centers of the light emitter 303 is the distance at which the first photodetector 304 can just receive the laser signal reflected by the light homogenizing device 305, that is, the second distance. At this point, if the first photodetector 304 moves further away from the light emitter 303, it will not be able to receive the laser signal reflected by the light homogenizing device 305. The calculation process for the second distance is as follows: Let Sy be the closest distance between the intersection point of the laser signal emitted by the light emitter 303 on the homogenizing device 305 and the blocking component 30223. Then, based on the distance H between the light emitter 303 and the homogenizing device 305, and the beam divergence angle of the light emitter 303... It can be calculated Let θy be the angle between the farthest beam emitted by the light emitter 303 and the blocking component 30223 after reflection by the light homogenizer 305. Then, based on Sy and t, the angle between the reflected ray and the blocking component 30223 can be calculated using trigonometric relationships. Let N be the distance between the first photodetector 304 and the blocking component 30223 along the X-axis. Based on the distance L between the first photodetector 304 and the blocking component 30223 and tanθy, we can use trigonometric relationships to know that tanθy = L / N. Therefore, the second distance can be derived as

[0073] In this embodiment, at least one first photodetector 304 is mounted on the upper surface of the substrate 301 and located directly below the shielding member 30223. By using the shielding member 30223 to shield, the influence of external light signals on the first photodetector 304 can be isolated. Therefore, when the light-diffusing device 305 is damaged or detached, the abnormality can be detected based on the change in the detection photocurrent. Furthermore, even if the light-diffusing device 305 is in a good condition, the shielding member 30223 can isolate other interfering light signals, thereby improving the accuracy of the detection results.

[0074] See Figure 8The light emitting module provided in this application embodiment also includes a second photodetector 306, which is mounted on the upper surface of the substrate 301 and is not directly below the blocking member 30223. The second photodetector 306 is used to detect the blocking state of the light emitting module. When the light emitting module is blocked by an object such as a user's hand, the homogenized light signal, after being homogenized by the homogenizing device 305, cannot be transmitted through the user's hand but is reflected into the light emitting module and propagates along the light broadcast path to the second photodetector 306. This amplifies the reflected light signal received by the second photodetector 306, and correspondingly increases the converted detection light signal. The second photodetector 306 in this application embodiment receives the reflected light signal and converts it into a detection photocurrent, thus detecting the blocking state of the light emitting module. When the detection photocurrent converted by the second photodetector 306 increases, it can be determined that the light emitting module is blocked.

[0075] In another embodiment of this application, the light emitting module further includes a control chip connected to the first photodetector 304, the second photodetector 306, and the light emitter 303. The control chip controls the laser signal emitted by the light emitter 303 based on the detection results of the first or second photodetector. Specifically, when the first photodetector 304 detects that the homogenizing device 305 is damaged or detached, to prevent the laser signal emitted by the light emitting module from causing damage to the user's face, especially the eyes, the control chip can send a control command to the light emitter 303 to stop emitting the laser signal, based on the detection result of the first photodetector 304. Similarly, when the second photodetector 306 detects that the light emitting module is blocked, to prevent the laser signal emitted by the light emitting module from damaging the user's hands, the control chip can send a control command to the light emitter 303 to stop emitting the laser signal, based on the detection result of the second photodetector 306.

[0076] The optical emission module provided in this application can not only detect whether the light homogenizing device is in an abnormal state, but also detect whether the optical emission module is in a blocked state. Based on the detection results, the laser signal emitted by the optical emitter can be controlled to improve the safety of the optical emission module.

[0077] Furthermore, the light-emitting modules in related technologies generally employ integrated ceramic (High Temperature Co-fired Ceramic, HTTC) packaging technology. However, this integrated ceramic packaging technology cannot be adapted to the shielding scheme of the first photodetector. To adapt to the shielding scheme of the first photodetector, embodiments of this application may use non-integrated processes such as LHA technology to replace the HTTC process for packaging.

[0078] All of the above-mentioned optional technical solutions can be combined in any way to form the optional embodiments of this application, and will not be described in detail here.

[0079] This application provides a flowchart of an anomaly detection method. Figures 3 to 8 The light emitting module shown is an example of an embodiment of this application. See [link / reference]. Figure 9 The method flow provided in this application embodiment includes:

[0080] 901. The light emitter emits the first laser signal.

[0081] In this embodiment, the laser signal emitted by the light emitter has a high power. To avoid damage or detachment of the light homogenizing device, which could cause harm to the user's eyes, this embodiment uses a light emitting module to detect abnormalities such as damage or detachment of the light homogenizing device. The light emitter can be controlled to emit a first laser signal with low power. Even if the light homogenizing device of the light emitting module malfunctions, the emitted first laser signal will not cause harm to the user's eyes.

[0082] 902. The first photodetector receives the first reflected light signal and converts the first reflected light signal into a first detection photocurrent.

[0083] After the light emitter emits the first laser signal, the emitted first laser signal reaches the homogenizing device along the light propagation path. Part of the first laser signal penetrates the homogenizing device and is homogenized to obtain a homogenized signal. This homogenized signal is used to collect 3D information of the real target scene, such as the user's 3D face image, so as to perform 3D face recognition. Another part of the first laser signal is reflected by the homogenizing device to form a first reflected light signal. The first photodetector receives the first reflected light signal and converts the received first laser signal into a first detection light signal.

[0084] 903. When the first detected photocurrent is less than the first reference photocurrent, and the difference between the two photocurrents exceeds the first threshold, the first photodetector determines that the homogenizing device is abnormal.

[0085] In this embodiment, since the first photodetector is blocked by the blocking component, it will not receive external light signals. If the homogenizing device is damaged or detached, the first laser signal reflected by the homogenizing device will decrease, or even not be reflected at all. In this case, the first reflected light signal received by the first photodetector will decrease, and the first detection photocurrent obtained by the first photodetector based on the first reflected light signal will also decrease. Therefore, based on the magnitude of the first detection photocurrent, the first photodetector can detect whether the homogenizing device is damaged or detached.

[0086] Specifically, based on the converted first detected photocurrent, the first photodetector compares the first detected photocurrent with a first reference photocurrent. If the first detected photocurrent is less than the first reference photocurrent, and the difference between the first detected photocurrent and the first reference photocurrent exceeds a first threshold, then the first photodetector can determine that the homogenizing device is malfunctioning. Here, the first reference photocurrent is the photocurrent converted by the first photodetector when the homogenizing device is in good working order. The first threshold is the error between the actual detected photocurrent converted by the first photodetector and the first reference photocurrent when the homogenizing device is in good working order; this threshold can be set by technicians based on experience.

[0087] Furthermore, after the first photodetector determines that the homogenizing device is abnormal, in order to avoid the emitted first laser signal burning the user's eyes, the first photodetector will also send a first notification message to the control chip. This first notification message is used to indicate to the control chip that the homogenizing device has been damaged or detached. When the first notification message is received, the control chip can send a first control command to the light transmitter. When the first control command is received, the light transmitter stops emitting the first laser signal.

[0088] In another embodiment of this application, the first photodetector compares the first detection optical signal with the first reference optical signal. When the difference between the first detection optical signal and the first reference photocurrent does not exceed a first threshold, the first photodetector can determine that the homogenizing device is in good condition and there are no abnormalities such as damage or detachment. Considering that the greater the power of the laser signal emitted by the light emitter, the greater the intensity of the homogenized signal obtained after homogenization, and the higher the clarity of the 3D information of the real target scene acquired based on the homogenized signal, and considering that the intensity of the first laser signal emitted by the light emitter is relatively weak when detecting abnormalities in the homogenizing device, in order to acquire 3D information of the real target scene with higher clarity, the light emitter needs to emit a laser signal with higher power. Therefore, when it is determined that the homogenizing device is in good condition, the first photodetector can send a second notification message to the control chip. This second notification message is used to notify the control chip that the homogenizing device is in good condition and there are no abnormalities such as damage or detachment. When the second notification message is received, the control chip can send a second control command to the optical transmitter. Upon receiving the second control command, the optical transmitter emits a second laser signal with a power greater than that of the first laser signal.

[0089] The anomaly detection method provided in this application embodiment can be executed each time the light emission module is used to collect 3D information of the real target scene, thereby avoiding the adverse effects on the user's eyes caused by abnormal situations such as damage or detachment of the light homogenizing device.

[0090] Regarding the anomaly detection method provided in the embodiments of this application, the following will be combined with Figure 10 and Figure 11 Please provide an explanation.

[0091] Figure 10 The light-emitting module shown does not have a glass cover. Figure 10 The beam homogenizing device of the light-emitting module shown in Figure (a) is normal. Figure 10 The homogenizing device of the light-emitting module shown in Figure (b) has detached. See also Figure 10 In Figure (a), when the homogenizing device of the light-emitting module is in good working order, the first laser signal emitted by the LD (i.e., the light emitter) is reflected by the homogenizing device to obtain a first reflected light signal. PD1 (i.e., the first photodetector) receives the first reflected light signal and converts it into a first detection photocurrent (i.e., the standard PD value). See also... Figure 10In Figure (b), when the homogenizing device of the light emitting module is damaged or detached, the first laser signal emitted by the LD directly propagates to the outside of the light emitting module because there is no glass cover plate outside the light emitting module. PD1 is located directly below the shielding component, and the ambient light signal is reflected by the shielding component and cannot propagate to PD1. The first reflected light signal received by PD1 is weakened, and the first detection photocurrent obtained by converting the first reflected light signal will decrease. By comparing the first detection photocurrent with the first reference photocurrent, it can be determined that the homogenizing device is damaged or detached.

[0092] Figure 11 The light-emitting module shown is covered with a glass cover. Figure 11 The beam homogenizing device of the light-emitting module shown in Figure (a) is normal. Figure 11 The homogenizing device of the light-emitting module shown in Figure (b) has detached. See also Figure 11 In Figure (a), when the homogenizing device of the light-emitting module is in good working order, a portion of the first laser signal emitted by the LD (i.e., the light emitter) passes through the homogenizing device and is processed by the homogenizing device to obtain a homogenized signal. Another portion of the first laser signal emitted by the LD is reflected by the homogenizing device to obtain a first reflected light signal. Because the homogenized signal reflected by the glass cover and the ambient light signal penetrating the glass cover are reflected by the blocking components, they cannot reach PD1 (i.e., the first photodetector). PD1 only receives the first reflected light signal and then converts it into a first detection photocurrent (i.e., the standard PD value). See also... Figure 11 In Figure (b), when the light-diffusing device of the light-emitting module is damaged or detached, the first laser signal emitted by the LD (i.e., the light emitter) directly illuminates the glass cover plate without being reflected by the light-diffusing device. The glass cover plate reflects the first laser signal, and the reflected laser signal is reflected by the blocked component and cannot propagate to PD1. The first reflected light signal received by PD1 is weakened, and the first detection photocurrent obtained by converting the first reflected light signal is also reduced. It can be determined that the light-diffusing device is damaged or detached.

[0093] The method provided in this application can avoid the influence of external ambient light signals on the detection of the light homogenizing device, and can accurately detect abnormalities in the light homogenizing device, resulting in more accurate detection results.

[0094] This application provides a flowchart of an anomaly detection method. Figures 3 to 8 The light emitting module shown is an example of an embodiment of this application. See [link / reference]. Figure 12 The method flow provided in this application embodiment includes:

[0095] 1201. The second photodetector receives the second reflected light signal and converts the second reflected light signal into a second detection photocurrent.

[0096] The second reflected light signal includes all reflected light signals that the second photodetector can receive, and the second reflected light signal may include light signals reflected by the light homogenizing device, light signals reflected by the glass cover plate, etc.

[0097] 1202. When the second detected photocurrent is greater than the second reference photocurrent, and the difference between the two photocurrents exceeds the second threshold, the second photodetector determines that the light emitting module is in a blocked state.

[0098] When the light-emitting module is blocked and a glass cover is installed on its exterior, if the beam-homing device is damaged or detached, the laser signal emitted by the light emitter will strike the glass cover. Because the light-emitting module is blocked, the laser signal cannot be emitted and is reflected back into the light-emitting module by the obstruction. This results in an amplification of the reflected light signal received by the second photodetector, leading to a larger converted detection photocurrent. Conversely, when the light-emitting module is blocked and no glass cover is installed on its exterior, if the beam-homing device is damaged or detached, the laser signal emitted by the light emitter cannot be emitted and is reflected back into the light-emitting module by the obstruction. This results in an amplification of the reflected light signal received by the second photodetector, leading to a larger converted detection photocurrent. When the glass cover is in place, if the light-diffusing device is functioning normally and there are no abnormalities such as breakage or detachment, the laser signal emitted by the light emitter is processed by the light-diffusing device to obtain a uniform light signal. However, because the light-emitting module is blocked, the uniform light signal cannot be emitted and is reflected back into the light-emitting module by the blocking object. This results in an increase in the reflected light signal received by the second photodetector, and the converted detection photocurrent becomes larger. When the light-emitting module is blocked and a glass cover is installed outside the light-emitting module, if the light-diffusing device is functioning normally and there are no abnormalities such as breakage or detachment, the laser signal emitted by the light emitter is processed by the light-diffusing device to obtain a uniform light signal. However, because the light-emitting module is blocked, the uniform light signal cannot be emitted and is reflected back into the light-emitting module by the blocking object. This results in an increase in the reflected light signal received by the second photodetector, and the converted detection photocurrent becomes larger. In other words, regardless of whether the light-diffusing device in the light-emitting module is damaged or detached, or whether there is a glass cover plate on the outside of the light-emitting module, when the light-emitting module is blocked, the second detection photocurrent converted by the second photodetector will increase. Therefore, it can be determined whether the light-emitting module is blocked based on whether the second detection photocurrent increases.

[0099] Specifically, the second photodetector receives the second reflected light signal, converts it into a second detected photocurrent, and compares this second detected photocurrent with a second reference photocurrent. If the second detected photocurrent is greater than the second reference photocurrent, and the difference between the two exceeds a second threshold, the second photodetector can determine that the light emitting module is in a blocked state. Here, the second reference photocurrent is the photocurrent converted by the second photodetector when the light emitting module is not blocked. The second threshold is the error between the actual detected photocurrent converted by the second photodetector and the second reference photocurrent when the light emitting module is not blocked; this threshold can be set by technicians based on experience.

[0100] Furthermore, after the second photodetector determines that the light emitting module is blocked, in order to prevent the laser signal from the light emitter from burning the user's skin, the second photodetector will also send a third notification message to the control chip. This third notification message is used to notify the control chip that the light emitting module is blocked. When the third notification message is received, the control chip can send a third control command to the light emitter. When the third control command is received, the light emitter can stop emitting laser signals.

[0101] Furthermore, to control the laser signal emitted by the light emitter with greater precision, the second photodetector, after comparing the second detected photocurrent with the second reference photocurrent, can determine the level of damage to the user's skin based on the difference between the two photocurrents. This determined damage level is then sent to the control chip in a third notification message. Upon receiving the third notification message, the control chip determines the control method for the light emitter based on the damage level, thereby controlling the emitted laser signal by sending a third control command to the light emitter. Specifically, if the laser signal emitted by the light emitter causes a high level of damage to the user's skin, the control method is to stop emitting the laser signal; if the laser signal emitted by the light emitter causes a low level of damage, the control method is to reduce the power of the emitted laser signal.

[0102] Regarding the anomaly detection method provided in the embodiments of this application, the following will be combined with Figure 13 Please provide an explanation.

[0103] See Figure 13The light emitting module is equipped with a glass cover, and the homogenizing device in the light emitting module is functioning normally without any damage or detachment. The LD emits a laser signal, a portion of which is reflected by the homogenizing device. The reflected signal can propagate along the light propagation path to PD1 and PD2. The other portion of the laser signal penetrates the homogenizing device and is processed to obtain a homogenized signal. Due to the obstruction outside the glass cover, the homogenized signal cannot propagate out but is reflected into the light emitting module. Since PD1 is located directly below the obstruction, the light signal reflected by the glass cover cannot propagate to PD1. However, PD2 is not located directly below the obstruction, so the light signal reflected by the glass cover can propagate to PD2. The second reflected light signal received by PD2 is enhanced, and the converted second detection photocurrent becomes larger. When the second detection photocurrent is compared with the second reference photocurrent, the second detection photocurrent is greater than the second reference photocurrent, and the difference between the second detection photocurrent and the second reference photocurrent is greater than the second threshold. Therefore, it can be determined that the light emitting module is in an obstructed state.

[0104] The method provided in this application embodiment can detect whether the light emitting module is in a blocked state, and then control the laser signal emitted by the light emitter according to the state of the light emitting module, thereby avoiding damage to the user's skin and improving the safety of using the light emitting module.

[0105] This application provides a depth camera, see [link to relevant documentation] Figure 14 The depth camera includes a light emitting module 1401 and a light receiving module 1402, which are electrically connected.

[0106] Among them, the optical emission module 1401 can be Figures 3 to 8 The light emitting module shown is used to generate and emit a uniform light signal.

[0107] The light receiving module 1402 is used to receive the light signal reflected by the object from the uniform light signal. This light signal is used to collect 3D information of the real target scene, such as collecting the 3D face image of the user, thereby realizing the 3D face recognition function of the depth camera.

[0108] The depth camera described in this application embodiment can be used as a standalone camera or installed as a camera module inside an electronic device.

[0109] This application provides an electronic device, see [link to relevant documentation] Figure 15 The electronic device includes a housing 1501, a display screen 1502, and a depth camera 1503. The depth camera 1503, as a functional module, can be disposed between the housing 1501 and the display screen 1502. The depth camera 1503 can serve as... Figure 14 The depth camera shown.

[0110] To protect the optical components inside a depth camera, a glass cover is typically placed on the outside of the camera. For the depth camera to take pictures, the light-emitting surface of the light-emitting module faces the glass cover, and the light-receiving surface of the light-receiving module also faces the glass cover.

[0111] Considering that cameras in electronic devices include front-facing and rear-facing cameras, and that depth cameras, as camera components in electronic devices, can be either front-facing or rear-facing, the structure of the electronic device differs depending on whether the depth camera is used as a front-facing camera or a rear-facing camera. See also Figure 16 In Figure (a), when the depth camera is a rear-facing camera of an electronic device, the housing 1501 of the electronic device includes a glass cover, and the light-emitting surface of the light-emitting module in the depth camera 1503 faces the glass cover. See also Figure 16 In Figure (b), when the depth camera is the front-facing camera of an electronic device, the display screen 1502 of the electronic device includes a glass cover, and the light-emitting surface of the light-emitting module in the depth camera 1503 faces the glass cover.

[0112] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0113] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A light emitting module, characterized in that, The light emission module includes: a support structure, a substrate, a light emitter, a first photodetector, and a light homogenizing device. The support structure includes a surrounding frame and a mounting plane. The surrounding frame surrounds the upper surface of the substrate along the edge of the upper surface of the substrate. The mounting plane is a plane parallel to the upper surface of the substrate. The mounting plane includes a support member extending from the four side walls of the surrounding frame, a light-transmitting window, and a shielding member extending from any side of the support member. The light-diffusing device is mounted on the support member. The light emitter is mounted on the upper surface of the substrate. The light emitter is located directly below the light-transmitting window, and the light-emitting surface of the light emitter faces the light-uniforming device. The laser signal emitted by the light emitter is transmitted to the light-uniforming device through the light-transmitting window, so that the light-uniforming device performs light-uniforming processing on the transmitted laser signal. The first photodetector is also mounted on the upper surface of the substrate. The first photodetector is located directly below the shielding component, and the distance between the first photodetector and the light emission center of the light emitter is within a first distance range. The first distance range is the range within which the first photodetector can receive the laser signal reflected by the light homogenizing device. When an external light signal propagates along the light propagation path to the first photodetector, the external light signal is reflected by the shielding component and cannot propagate to the first photodetector, so that the first photodetector can detect the abnormality of the light homogenizing device based on the laser signal reflected by the light homogenizing device.

2. The light emitting module according to claim 1, characterized in that, The minimum distance in the first distance range is the first distance, which is determined according to the size of the light-transmitting window.

3. The light emitting module according to claim 1, characterized in that, The maximum distance within the first distance range is the second distance, which is determined based on the size of the light-transmitting window, the beam divergence angle of the light emitter, the distance between the light emitter and the light-uniforming device, the thickness of the blocking component, and the distance between the first photodetector and the blocking component.

4. The optical emitting module according to claim 1, characterized in that, The light emitting module further includes a second photodetector, which is mounted on the upper surface of the substrate and is not directly below the blocking component. The second photodetector is used to detect the blocking state of the light emitting module.

5. The optical emitting module according to claim 4, characterized in that, The light emitting module also includes a control chip, which is electrically connected to the first photodetector, the second photodetector and the light emitter. The control chip is used to control the laser signal emitted by the light emitter according to the detection result of the first photodetector or the detection result of the second photodetector.

6. The light emitting module according to any one of claims 1 to 5, characterized in that, The substrate is a ceramic substrate.

7. The light emitting module according to any one of claims 1 to 5, characterized in that, The laser source inside the light emitter is a surface light source.

8. An anomaly detection method, characterized in that, The method is applied to the optical emitting module according to any one of claims 1 to 7, and the method includes: The optical emitter emits a first laser signal; The first photodetector receives the first reflected light signal and converts the first reflected light signal into a first detection photocurrent. The first reflected light signal is the light signal obtained by the homogenizing device reflecting the first laser signal. When the first detected photocurrent is less than the first reference photocurrent, and the difference between the first and the first reference photocurrent exceeds a first threshold, the first photodetector determines that the homogenizing device is abnormal. The first reference photocurrent is the photocurrent converted by the first photodetector when the homogenizing device is in good condition.

9. The method according to claim 8, characterized in that, After the first photodetector determines that the homogenizing device is malfunctioning, the method further includes: The first photodetector sends a first notification message to the control chip in the light emitting module; Upon receiving the first notification message, the control chip sends a first control command to the light transmitter, which is used to control the light transmitter to stop emitting the first laser signal.

10. The method according to claim 8, characterized in that, The method further includes: When the difference between the first detected photocurrent and the first reference photocurrent does not exceed the first threshold, the first photodetector sends a second notification message to the control chip in the light emission module. Upon receiving the second notification message, the control chip sends a second control command to the optical transmitter. The second control command is used to control the optical transmitter to emit a second laser signal, the power of which is greater than the power of the first laser signal.

11. The method according to claim 8, characterized in that, The method further includes: The second photodetector in the light emitting module receives the second reflected light signal and converts the second reflected light signal into a second detection photocurrent. When the second detected photocurrent is greater than the second reference photocurrent, and the difference between the two photocurrents exceeds the second threshold, the second photodetector determines that the light emitting module is in a blocked state. The second reference photocurrent is the photocurrent converted by the second photodetector when the light emitting module is not in a blocked state.

12. The method according to claim 11, characterized in that, After the second photodetector determines that the light emitting module is in a blocked state, it further includes: The second photodetector sends a third notification message to the control chip in the light emitting module; Upon receiving the third notification message, the control chip sends a third control command to the optical transmitter, which is used to control the optical transmitter to stop emitting the second laser signal.

13. A depth camera, characterized in that, The depth camera includes a light emitting module and a light receiving module, and the light emitting module and the light receiving module are electrically connected; The light emitting module is the light emitting module as described in any one of claims 1 to 7, used to generate and emit uniform light signals; The light receiving module is used to receive the light signal obtained by the uniform light signal being reflected by the object.

14. An electronic device, characterized in that, The electronic device includes a housing, a display screen, and a depth camera, wherein the depth camera is disposed between the housing and the display screen, and the depth camera is as described in claim 13.

15. The electronic device according to claim 14, characterized in that, The display screen includes a glass cover, and the light-emitting surface of the light-emitting module in the depth camera faces the glass cover.

16. The electronic device according to claim 14, characterized in that, The housing includes a glass cover plate, and the light-emitting surface of the light-emitting module in the depth camera faces the glass cover plate.

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