WO2020038061A1

WO2020038061A1 - Flight time module and control method thereof, controller and electronic device

Info

Publication number: WO2020038061A1
Application number: PCT/CN2019/090075
Authority: WO
Inventors: 韦怡
Original assignee: Oppo广东移动通信有限公司
Priority date: 2018-08-22
Filing date: 2019-06-05
Publication date: 2020-02-27
Also published as: CN109059797A; CN109059797B

Abstract

Disclosed are a control method of a flight time module (20), a controller (28) of the flight time module (20), a flight time module (20) and an electronic device (10). The flight time module (20) comprises an optical transmitter (23) and an optical detector (27); the control method comprises: (01) obtaining a demarcated electrical signal; (02) controlling the optical transmitter (23) to transmit an optical signal; (03) controlling the optical detector (27) to convert the received optical signal into a detected electrical signal; and (04) controlling the operating parameters of the optical transmitter (23) according to the detected electrical signal and the demarcated electrical signal.

Description

Time-of-flight module and its control method, controller and electronic device

Priority information

This application claims the priority and rights of the patent application filed with the State Intellectual Property Office of China on August 22, 2018, with a patent application number of 201810962822.6, which is hereby incorporated by reference in its entirety.

Technical field

The present application relates to the field of three-dimensional imaging technology, and more particularly, to a method of controlling a time-of-flight module, a controller of a time-of-flight module, a time-of-flight module, and an electronic device.

Background technique

Time of flight (TOF) module can calculate the depth information of the measured object by calculating the time difference between the time when the optical transmitter emits the optical signal and the time when the optical receiver receives the optical signal.

Summary of the Invention

Embodiments of the present application provide a method of controlling a time-of-flight module, a controller of a time-of-flight module, a time-of-flight module, and an electronic device.

An embodiment of the present application provides a method for controlling a time-of-flight module. The time-of-flight module includes a light transmitter and a light detector. The control method includes: obtaining a calibration electrical signal; Controlling the light detector to convert the received light signal into a detection electric signal; and controlling an operating parameter of the light transmitter according to the detection electric signal and the calibration electric signal.

An embodiment of the present application provides a controller of a time-of-flight module. The time-of-flight module includes a light transmitter and a light detector. The controller is configured to: obtain a calibration electrical signal; and control the light transmitter to emit a light signal; Controlling the light detector to convert the received light signal into a detection electric signal; and controlling an operating parameter of the light transmitter according to the detection electric signal and the calibration electric signal.

An embodiment of the present application provides a time-of-flight module. The time-of-flight module includes a light transmitter, a light detector, and a controller according to the foregoing embodiment. The light transmitter is used to emit a light signal. The light detector is used to: The received optical signal is converted into a detection electric signal.

An embodiment of the present application provides an electronic device. The electronic device includes a casing and a time-of-flight module according to the foregoing embodiment, and the time-of-flight module is disposed on the casing.

Additional aspects and advantages of the embodiments of the present application will be partially given in the following description, and part of them will become apparent from the following description, or be learned through the practice of the embodiments of the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a schematic flowchart of a control method of a time-of-flight module according to some embodiments of the present application; FIG.

2 is a schematic block diagram of a time-of-flight module according to some embodiments of the present application;

3 is a schematic structural diagram of a light source of a light transmitter of a time-of-flight module according to some embodiments of the present application;

4 to 9 are schematic flowcharts of a method for controlling a time-of-flight module according to some embodiments of the present application;

FIG. 10 is a schematic perspective structural diagram of a state of an electronic device according to some embodiments of the present application; FIG.

11 is a schematic perspective structural view of another state of an electronic device according to some embodiments of the present application;

FIG. 12 is a perspective structural diagram of a time-of-flight module according to some embodiments of the present application; FIG.

13 is a schematic top view of a time-of-flight module according to some embodiments of the present application;

14 is a schematic bottom view of a time-of-flight module according to some embodiments of the present application;

15 is a schematic side view of a time-of-flight module according to some embodiments of the present application;

16 is a schematic cross-sectional view of the time-of-flight module shown in FIG. 13 along the XVI line;

FIG. 17 is an enlarged schematic view of the XVII part in the time-of-flight module shown in FIG. 16; FIG.

18 is a schematic front view of a time-of-flight module of some embodiments of the present application when the flexible circuit board is not bent;

19 to 22 are schematic structural diagrams of a light emitter according to some embodiments of the present application.

detailed description

The embodiments of the present application are further described below with reference to the accompanying drawings. The same or similar reference numerals in the drawings represent the same or similar elements or elements having the same or similar functions throughout. The embodiments of the present application described below with reference to the drawings are exemplary, and are only used to explain the embodiments of the present application, and should not be construed as limiting the present application.

Please refer to FIGS. 1 and 2. The time of flight module 20 according to the embodiment of the present application includes a light emitter 23 and a light detector 27. Control methods include:

01: Obtain the calibration electrical signal;

02: controlling the light transmitter 23 to emit light signals;

03: controlling the photodetector 27 to convert the received light signal into a detection electric signal; and

04: Control the operating parameters of the light transmitter 23 according to the detected electrical signal and the calibrated electrical signal.

Please refer to FIG. 2 and FIG. 4. In some embodiments, the step of obtaining a calibration electrical signal (ie, 01) includes:

011: controlling the light transmitters 23 of the multiple time-of-flight modules 20 to emit optical signals;

012: controlling the light detectors 27 of the multiple time-of-flight modules 20 to respectively convert the light signals received by the corresponding light-timers 23 of the time-of-flight modules 20 into a plurality of reference electrical signals; and

013: Calculate the calibration electrical signal based on multiple reference electrical signals.

Please refer to FIG. 2 and FIG. 5. In some embodiments, the step of obtaining a calibration electrical signal (ie, 01) includes:

014: controlling the light transmitter 23 of each time of flight module 20 to emit light signals; and

015: controlling the light detector 27 of each time-of-flight module 20 to convert the received light signal emitted by the corresponding light-timer 23 of the time-of-flight module 20 into an electrical signal as a calibration electrical signal;

The step of controlling the operating parameters of the optical transmitter 23 according to the detected electrical signal and the calibrated electrical signal (ie, 04) includes:

041: Control the operating parameters of the optical transmitter 23 according to the detected electrical signal and the corresponding calibrated electrical signal.

Please refer to FIG. 2 and FIG. 6. In some embodiments, the step of obtaining a calibration electrical signal (ie, 01) includes:

016: directly read the calibration electrical signals pre-stored in the time-of-flight module 20, and the calibration electrical signals are obtained according to the light transmitter 23 and the light detector 27 in each time-of-flight module 20; or, the electrical signals are calibrated It is calibrated according to the light emitters 23 and the light detectors 27 in the multiple time-of-flight modules 20.

Please refer to FIGS. 2, 3 and 7. In some embodiments, the light emitter 23 includes a light source 60. The step of controlling the operating parameters of the optical transmitter 23 according to the detected electrical signal and the calibrated electrical signal (ie, 04) includes:

042: Control the working current of the light source 60 according to the detection electrical signal and the calibration electrical signal.

Please refer to FIG. 2, FIG. 3 and FIG. 8. In some embodiments, the detection electrical signal and the calibration electrical signal are both current signals. The step of controlling the working current of the light source 60 according to the detected electrical signal and the calibrated electrical signal (ie, 042) includes:

0422: reduce the working current of the light source 60 when the detected electrical signal is greater than the calibrated electrical signal; and

0424: When the detected electric signal is smaller than the calibrated electric signal, the working current of the light source 60 is increased.

Please refer to FIGS. 2, 3 and 9. In some embodiments, the light emitter 23 includes a light source 60, and the light source 60 includes a plurality of light emitting elements 62. The step of controlling the operating parameters of the optical transmitter 23 according to the detected electrical signal and the calibrated electrical signal (ie, 04) includes:

043: Control the number of light-emitting elements 62 turned on by the light source 60 according to the detected electrical signal and the calibrated electrical signal.

Please refer to FIG. 2. The time-of-flight module 20 according to an embodiment of the present application includes a light transmitter 23 and a light detector 27. The controller 28 is configured to: obtain a calibration electric signal; control the light transmitter 23 to emit a light signal; control the light detector 27 to convert the received light signal into a detection electric signal; and control the light transmitter according to the detection electric signal and the calibration electric signal 23 operating parameters.

In some embodiments, the controller 28 is further configured to control the light transmitters 23 of the multiple time-of-flight modules 20 to emit optical signals; control the light detectors 27 of the multiple time-of-flight modules 20 to respectively receive the corresponding signals. The light signal emitted by the light transmitter 23 of the time of flight module 20 is converted into a plurality of reference electrical signals; and the calibration electrical signal is calculated based on the plurality of reference electrical signals.

In some embodiments, the controller 28 is further configured to: control the light transmitter 23 of each time-of-flight module 20 to emit light signals; control the light detector 27 of each time-of-flight module 20 to receive a corresponding The optical signal emitted by the light transmitter 23 of the time-of-flight module 20 is converted into an electrical signal as a calibration electrical signal; and the operating parameters of the light transmitter 23 are controlled according to the detected electrical signal and the corresponding calibration electrical signal.

In some embodiments, the controller 28 is configured to directly read the calibration electrical signals pre-stored in the time-of-flight module 20. The calibration electrical signals are based on the light transmitter 23 and the light detector in each time-of-flight module 20. 27; or, the calibration electrical signals are obtained according to the light transmitters 23 and the light detectors 27 in the multiple time-of-flight modules 20.

Please refer to FIGS. 2 and 3. In some embodiments, the light emitter 23 includes a light source 60. The controller 28 is configured to control the working current of the light source 60 according to the detected electrical signal and the calibrated electrical signal.

In some embodiments, the detection electrical signal and the calibration electrical signal are both current signals. The controller 28 is configured to reduce the working current of the light source 60 when the detected electrical signal is greater than the calibrated electrical signal; and increase the working current of the light source 60 when the detected electrical signal is less than the calibrated electrical signal.

In some embodiments, the light emitter 23 includes a light source 60 including a plurality of light emitting elements 62. The controller 28 is configured to control the number of the light emitting elements 62 turned on by the light source 60 according to the detected electrical signal and the calibrated electrical signal.

Referring to FIG. 2, the time-of-flight module 20 according to the embodiment of the present application includes a light transmitter 23, a light detector 27, and a controller 28 according to any one of the foregoing embodiments. The light transmitter 23 is used for transmitting a light signal, and the light detector 27 is used for converting the received light signal into a detection electric signal.

Please refer to FIG. 10 and FIG. 11. The electronic device 100 according to the embodiment of the present application includes a case 10 and a time-of-flight module 20 according to any one of the above embodiments. The time-of-flight module 20 is disposed on the casing 10.

Please refer to FIG. 1 and FIG. 2, an embodiment of the present application provides a control method of a time-of-flight module 20. The time of flight module 20 includes a light emitter 23 and a light detector 27. Control methods include:

01: Obtain the calibration electrical signal;

02: controlling the light transmitter 23 to emit light signals;

Please refer to FIG. 2, an embodiment of the present application provides a controller 28 of a time of flight module 20. The time of flight module 20 includes a light emitter 23 and a light detector 27. The control method of the time of flight module 20 according to the embodiment of the present application may be implemented by the controller 28 of the time of flight module 20 according to the embodiment of the present application. For example, the controller 28 may be used to perform the methods in 01, 02, 03, and 04. That is to say, the controller 28 may be used to: obtain a calibration electrical signal; control the light transmitter 23 to emit a light signal; control the light detector 27 to convert the received light signal into a detection electrical signal; and according to the detection electrical signal and calibration The electrical signal controls the operating parameters of the light transmitter 23.

It can be understood that the Time of Flight (TOF) module can calculate the depth information of the measured object by calculating the time difference between the time when the optical transmitter emits the optical signal and the time when the optical receiver receives the optical signal. When the time-of-flight module works, it is generally necessary to ensure the accuracy of the depth information it acquires in order to better apply the depth information, such as achieving better 3D effects and AR experiences.

The control method of the time-of-flight module 20 and the controller 28 of the time-of-flight module 20 according to the embodiments of the present application adjust the light emission according to the difference between the detected electrical signal and the calibrated electrical signal converted by the optical signal emitted by the optical transmitter 23 The operating parameters of the transmitter 23 are used to calibrate the optical power output by the light transmitter 23 and ensure the accuracy of the depth information obtained by the time-of-flight module 20.

Specifically, the light emitter 23 may be a vertical cavity surface emitting laser (Vertical Cavity Surface Emitting Laser, VCSEL). The light detectors 27 may be photo-diodes (PDs) or other elements capable of converting light signals into electrical signals, and the number of the light detectors 27 may be one or more.

The light detector 27 is used to convert the received light signal into a detection electric signal. The light signal received by the light detector 27 may be a light signal directly emitted by the light transmitter 23 or a light signal that reaches the light detector 27 after being emitted by the light transmitter 23 after reflection or refraction. The light detector 27 converts the received light signal into a detection electric signal, and the detection electric signal may be a current signal or a voltage signal.

The calibrated electrical signal is the expected value of the detected electrical signal. That is, the controller 28 adjusts the working parameters of the light transmitter 23 according to the difference between the detected electrical signal and the calibrated electrical signal, so that the detected electrical signal converted by the light detector 27 according to the received optical signal is finally equal to the calibrated electrical signal. Signal or approaching the calibration electrical signal. The controller 28 may obtain a calibration electrical signal before controlling the light transmitter 23 to emit an optical signal; or obtain a calibration electrical signal before controlling the light detector 27 to convert the received optical signal into a detection electrical signal; or Obtaining the calibration electrical signal before the calibration electrical signal controls the operating parameters of the optical transmitter 23 is not limited here.

The controller 28 controls the working parameters of the light transmitter 23 according to the detected electrical signal and the calibrated electrical signal. The working parameters can be the working current, the working voltage, the working power, and the number of the light emitting elements 62 of the light source 60 of the light transmitter 23 (as shown in the figure). 3 and Figure 19) and so on. Controlling the operating parameters of the optical transmitter 23 may be increasing the operating parameters of the optical transmitter 23, decreasing the operating parameters of the optical transmitter 23, or keeping the operating parameters of the optical transmitter 23 unchanged.

Referring to FIG. 2, in some embodiments, the controller 28 may be used to perform the methods in 011, 012, and 013. That is to say, the controller 28 can also be used to: control the light transmitters 23 of the multiple time-of-flight modules 20 to emit light signals; control the light detectors 27 of the multiple time-of-flight modules 20 to respectively receive the corresponding The optical signals emitted by the light transmitter 23 of the time of flight module 20 are converted into a plurality of reference electrical signals; and a calibration electrical signal is calculated based on the plurality of reference electrical signals.

Specifically, in the process of obtaining the calibration electrical signals, the controller 28 may control the light transmitters 23 of the multiple time-of-flight modules 20 to sequentially emit optical signals, and then control the light detectors 27 of the multiple time-of-flight modules 20 to sequentially emit light signals. The received corresponding optical signals are converted into a plurality of reference electrical signals. After obtaining a plurality of reference electrical signals, the controller 28 may calculate a calibration electrical signal according to an average value of the plurality of reference electrical signals; or calculate a calibration electrical signal according to a median of the plurality of reference electrical signals; or according to a plurality of reference electrical signals The mode calculation of the calibration electric signal and so on.

The following uses multiple time-of-flight modules 20 as an example to describe a first time-of-flight module, a second time-of-flight module, a third time-of-flight module, and a fourth time-of-flight module. The time-of-flight module 20 of the operating parameters of the transmitter 23 may be any one of the above-mentioned first time-of-flight module, second time-of-flight module, third time-of-flight module, and fourth time-of-flight module, or it does not belong to Any one of the first time of flight module, the second time of flight module, the third time of flight module, and the fourth time of flight module. The first time of flight module includes a first light transmitter and a first light detector, the second time of flight module includes a second light transmitter and a second light detector, and the third time of flight module includes a third light transmitter And a third light detector, the fourth time-of-flight module includes a fourth light emitter and a fourth light detector. The controller 28 first controls the first optical transmitter to emit an optical signal, and then the first optical detector converts the optical signal emitted by the first optical transmitter into a first reference electrical signal. The controller 28 then controls the second optical transmitter to emit an optical signal, and then the second optical detector converts the optical signal emitted by the second optical transmitter into a second reference electrical signal. The controller 28 then controls the third optical transmitter to emit an optical signal, and then the third optical detector converts the optical signal emitted by the third optical transmitter into a third reference electrical signal. The controller 28 finally controls the fourth optical transmitter to emit an optical signal, and then the fourth optical detector converts the optical signal emitted by the fourth optical transmitter into a fourth reference electrical signal. After obtaining the first reference electrical signal, the second reference electrical signal, the third reference electrical signal, and the fourth reference electrical signal, for example, the first reference electrical signal is 0.4 mA, the second reference electrical signal is 0.3 mA, and the third reference The electrical signal is 0.5 mA, and the fourth reference electrical signal is 0.5 mA. Controller 28 calculates the calibration electrical signal based on the average of 0.4mA, 0.3mA, 0.5mA, and 0.5mA to be 0.425mA; or controller 28 calculates the calibration based on the median values of 0.4mA, 0.3mA, 0.5mA, and 0.5mA The electric signal is 0.45mA; or the controller 28 calculates the calibrated electric signal as 0.5mA according to the mode of 0.4mA, 0.3mA, 0.5mA, 0.5mA.

In other embodiments, the multiple time-of-flight modules 20 may also include other numbers (greater than or equal to two) of time-of-flight modules 20, and the controller 28 may also control the light transmitters 23 of the multiple time-of-flight modules 20. Simultaneously, the optical signals are transmitted to obtain the calibration electrical signals. Specifically, the shading device or other methods may be adopted to make the processes of obtaining the reference electrical signals by the multiple time-of-flight modules 20 do not affect each other. The controller 28 may also calculate the calibration electrical signal by using other calculation methods according to multiple reference electrical signals, which is not limited herein.

In the embodiment of the present application, the controller 28 obtains a unique calibration electric signal according to the calibration of the light transmitter 23 and the light detector 27 in the multiple time-of-flight modules 20, and in any subsequent time-of-flight module 20 When any one of the time-of-flight modules 20 or any other time-of-flight module 20) needs to calibrate the optical power output by the optical transmitter 23, the controller 28 can use the calibration electrical signal, so that the calibration electrical signal can be correlated with the The calibration electrical signal controls the working parameters of the light transmitter 23 to ensure the accuracy of the depth information acquired by the time-of-flight module 20.

Referring to FIG. 2, in some embodiments, the controller 28 may be used to perform the methods in 014, 015, and 041. That is to say, the controller 28 can also be used to: control the light transmitter 23 of each time of flight module 20 to emit light signals; control the corresponding flight that the light detector 27 of each time of flight module 20 will receive The optical signal emitted by the optical transmitter 23 of the time module 20 is converted into an electrical signal as a calibration electrical signal; and the operating parameters of the optical transmitter 23 are controlled according to the detected electrical signal and the corresponding calibration electrical signal.

Specifically, in the process of acquiring the calibration electrical signal, the controller 28 may control the light transmitter 23 of each time-of-flight module 20 to emit an optical signal, and then control the light detector 27 of each time-of-flight module 20 to receive the light signal. The corresponding optical signal is converted into an electrical signal as a calibration electrical signal. That is to say, each time-of-flight module 20 can obtain a calibration electrical signal separately, and the calibration electric signals between multiple time-of-flight modules 20 are not related to each other. The controller 28 controls the operating parameters of the optical transmitter 23 according to the detected electrical signal and the corresponding calibrated electrical signal.

Still taking multiple time-of-flight modules 20 as an example for description, the first time-of-flight module, second time-of-flight module, third time-of-flight module, and fourth time-of-flight module are described as an example. The time-of-flight module 20 of the operating parameters of the transmitter 23 may be any one of the above-mentioned first time-of-flight module, second time-of-flight module, third time-of-flight module, and fourth time-of-flight module. The first time of flight module includes a first light transmitter and a first light detector, the second time of flight module includes a second light transmitter and a second light detector, and the third time of flight module includes a third light transmitter And a third light detector, the fourth time-of-flight module includes a fourth light emitter and a fourth light detector. The controller 28 first controls the first optical transmitter to emit an optical signal, and then the first optical detector converts the optical signal emitted by the first optical transmitter into an electrical signal as a first calibration electrical signal. The controller 28 then controls the second optical transmitter to emit an optical signal, and then the second optical detector converts the optical signal emitted by the second optical transmitter into an electrical signal as a second calibration electrical signal. The controller 28 then controls the third optical transmitter to emit an optical signal, and then the third optical detector converts the optical signal emitted by the third optical transmitter into an electrical signal as a third calibration electrical signal. The controller 28 finally controls the fourth optical transmitter to emit an optical signal, and then the fourth optical detector converts the optical signal emitted by the fourth optical transmitter into an electrical signal as a fourth calibration electrical signal. For example, the first calibration electrical signal is 0.4 mA, the second calibration electrical signal is 0.3 mA, the third calibration electrical signal is 0.5 mA, and the fourth calibration electrical signal is 0.5 mA. The controller 28 also determines which time-of-flight module 20 is the current time-of-flight module 20 that needs to control the operating parameters of the light transmitter 23, and if the current time-of-flight module 20 that needs to control the operating parameters of the light transmitter 23 is the first flight In the time module, the controller 28 controls the working parameters of the optical transmitter 23 according to the detection electrical signal and the first calibration electrical signal, so that the detection electrical signal is finally equal to the first calibration electrical signal or approaches the first calibration electrical signal. When the time-of-flight module 20 that currently needs to control the operating parameters of the light transmitter 23 is the second time-of-flight module, the third time-of-flight module, and the fourth time-of-flight module, the controller 28 corresponds to the detected electrical signal and the first time-of-flight module. The second calibration electric signal, the third calibration electric signal, or the fourth calibration electric signal controls the operating parameters of the optical transmitter 23, which will not be described in detail here.

In the embodiment of the present application, the controller 28 calibrates each time-of-flight module 20, and when each subsequent time-of-flight module 20 needs to calibrate the optical power output by the light transmitter 23, the controller 28 uses the same time-of-flight mode The group 20 or a calibration electric signal corresponding to the light detector 27 controls the working parameters of the light transmitter 23 according to the detected electric signal and the calibration electric signal to ensure the accuracy of the depth information acquired by the time of flight module 20.

In addition, since each time-of-flight module 20 or light detector 27 corresponds to a calibration electrical signal, the setting position, angle of the light detection element 27, and the diffuser 80 of the light emitter 23 (see FIG. 19) The selectivity of the reflectivity shown is higher. It only needs to satisfy the above factors. When calibrating the optical power output by the optical transmitter 23, it is basically consistent with the process of obtaining the calibration electrical signal.

Referring to FIG. 2, in some embodiments, the controller 28 may be used to execute the method in 016. That is to say, the controller 28 can be used to directly read the calibration electrical signals pre-stored in the time-of-flight module 20, and the calibration electrical signals are based on the light transmitter 23 and the light detector 27 in each time-of-flight module 20. The calibration signals are obtained; or, the calibration electrical signals are obtained according to the light transmitters 23 and the light detectors 27 in the multiple time-of-flight modules 20.

Specifically, a calibration electrical signal is obtained according to the calibration of the light transmitter 23 and the light detector 27 in each time-of-flight module 20 (for example, using the methods in 014 and 015), or according to multiple time-of-flight modules 20 After calibrating the light transmitter 23 and the light detector 27 to obtain the calibration electrical signals (for example, using the methods in 011, 012, and 013), the controller 28 may store the calibration electrical signals in the memory 29 of the time of flight module 20 (such as In FIG. 2), the memory 29 may be (Electrically Erasable Programmable Read Only Memory, EEPROM), a programmable erasable programmable read-only memory that is electrically charged.

In the embodiment of the present application, the calibration electric signal is pre-stored in the time-of-flight module 20 (generally, the time-of-flight module 20 is pre-stored in the time-of-flight module 20 before leaving the factory). When the controller 28 needs to When controlling the operating parameters of the light transmitter 23, the controller 28 reads the corresponding calibration electric signal from the memory 29 of the time of flight module 20, which is more convenient.

Please refer to FIGS. 2 and 3. In some embodiments, the light emitter 23 includes a light source 60. The controller 28 may be used to execute the method in 042. That is, the controller 28 can be used to control the working current of the light source 60 according to the detected electrical signal and the calibrated electrical signal.

Specifically, the controller 28 can control the working current of the light source 60 according to the difference between the detected electrical signal and the calibrated electrical signal, so as to adjust the optical power output by the optical transmitter 23, to achieve the calibration of the optical power output by the optical transmitter 23, and ensure The accuracy of the depth information acquired by the time of flight module 20.

Please refer to FIG. 2 and FIG. 3. In some embodiments, the detection electrical signal and the calibration electrical signal are both current signals. The controller 28 may be used to perform the methods in 0422 and 0424. That is to say, the controller 28 can be used to: reduce the operating current of the light source 60 when the detected electrical signal is greater than the calibrated electric signal; and increase the operating current of the light source 60 when the detected electrical signal is less than the calibrated electric signal.

Specifically, in general, the larger the working current of the light source 60 is, the larger the optical power output by the light transmitter 23 is. When the detection electric signal is a current signal, the light detector 27 converts the detection electricity obtained according to the received light signal. The signal is also larger. Therefore, when the detected electrical signal is greater than the calibrated electrical signal, it indicates that the detected electrical signal is too large, that is, the optical power output by the optical transmitter 23 is too large, so the working current of the light source 60 needs to be reduced to reduce the light output by the optical transmitter 23 Power to ensure the accuracy of the depth information acquired by the time-of-flight module 20. Similarly, when the detected electrical signal is smaller than the calibrated electrical signal, it indicates that the detected electrical signal is too small, that is, the optical power output by the optical transmitter 23 is too small, so the working current of the light source 60 needs to be increased to increase the output of the optical transmitter 23 The optical power ensures the accuracy of the depth information acquired by the time-of-flight module 20. It can be understood that when the detected electrical signal is equal to the calibrated electrical signal, the detected electrical signal meets the expected value, and the controller 28 does not need to adjust the working current of the light source 60, or the controller 28 controls the working current of the light source 60 to remain unchanged to maintain the light emitter. 23 outputs the current optical power to ensure the accuracy of the depth information acquired by the time-of-flight module 20.

In other embodiments, the controller 28 may reduce the working current of the light source 60 when the detected electrical signal is greater than the first calibration threshold; increase the working current of the light source 60 when the detected electrical signal is less than the second calibration threshold; When the detected electrical signal is greater than or equal to the second calibration threshold and less than or equal to the first calibration threshold, the working current of the light source 60 is kept unchanged. The first calibration threshold is greater than the calibration electrical signal, and the second calibration threshold is less than the calibration electrical signal.

Taking the calibration electrical signal equal to 0.4 mA as an example, the first calibration threshold can be 0.41 mA, and the second calibration threshold can be 0.39 mA. When the detected electrical signal is greater than or equal to 0.39 mA and less than or equal to 0.41 mA, the controller 28 keeps the working current of the light source 60 unchanged, so as to avoid the controller 28's The working current is frequently adjusted, which interferes with the operation of the time-of-flight module 20 and increases the complexity of the control logic of the time-of-flight module 20.

Referring to FIGS. 2, 3 and 9, in some embodiments, the light emitter 23 includes a light source 60, and the light source 60 includes a plurality of light emitting elements 62. The step of controlling the operating parameters of the optical transmitter 23 according to the detected electrical signal and the calibrated electrical signal (ie, 04) includes:

Please refer to FIGS. 2 and 3. In some embodiments, the light emitter 23 includes a light source 60, and the light source 60 includes a plurality of light emitting elements 62. The controller 28 may be used to perform the method in 043. That is to say, the controller 28 can be used to control the number of the light-emitting elements 62 turned on by the light source 60 according to the detected electrical signal and the calibrated electrical signal.

Specifically, the controller 28 may control the number of the light emitting elements 62 turned on by the light source 60 according to the difference between the detected electrical signal and the calibrated electrical signal, so as to adjust the optical power output by the optical transmitter 23 and realize the optical power output by the optical transmitter 23 Calibration to ensure the accuracy of the depth information acquired by the time of flight module 20.

Taking the detection electrical signal and the calibration electrical signal as current signals as an example, the controller 28 can reduce the number of light-emitting elements 62 turned on by the light source 60 when the detection electrical signal is greater than the calibration electrical signal; when the detection electrical signal is smaller than the calibration electrical signal, increase The number of light-emitting elements 62 turned on by the light source 60; when the detected electrical signal is equal to the calibrated electrical signal, the number of the light-emitting elements 62 turned on by the light source 60 is kept unchanged. Specifically, in general, the larger the number of light-emitting elements 62 turned on by the light source 60 is, the larger the optical power output by the light transmitter 23 is. When the detected electric signal is a current signal, the light detector 27 is converted according to the received light signal. The larger the detected electrical signal is. Therefore, when the detected electrical signal is greater than the calibrated electrical signal, it indicates that the detected electrical signal is too large, that is, the optical power output by the light transmitter 23 is too large, so the number of light emitting elements 62 turned on by the light source 60 needs to be reduced to reduce the light transmitter 23 The output optical power ensures the accuracy of the depth information acquired by the time-of-flight module 20. Similarly, when the detected electrical signal is smaller than the calibrated electrical signal, it indicates that the detected electrical signal is too small, that is, the optical power output by the light transmitter 23 is too small, so it is necessary to increase the number of light emitting elements 62 turned on by the light source 60 to increase the light transmitter. The optical power output by 23 guarantees the accuracy of the depth information acquired by the time of flight module 20. It can be understood that when the detected electrical signal is equal to the calibrated electrical signal, the detected electrical signal meets the expected value, and the controller 28 does not need to adjust the number of light-emitting elements 62 turned on by the light source 60, or the controller 28 controls the number of light-emitting elements 62 turned on by the light source 60 to be maintained. It does not change to maintain the current optical power output by the light transmitter 23 and ensure the accuracy of the depth information acquired by the time-of-flight module 20.

In other embodiments, the controller 28 may also reduce the number of light-emitting elements 62 turned on by the light source 60 when the detected electrical signal is greater than the first calibration threshold; and increase the light emitted by the light source 60 when the detected electrical signal is less than the second calibration threshold. The number of elements 62; when the detected electrical signal is greater than or equal to the second calibration threshold and less than or equal to the first calibration threshold, the number of light-emitting elements 62 that keep the light source 60 turned on remains unchanged. The first calibration threshold is greater than the calibration electrical signal, and the second calibration threshold is less than the calibration electrical signal.

Taking the calibration electrical signal equal to 0.4 mA as an example, the first calibration threshold can be 0.41 mA, and the second calibration threshold can be 0.39 mA. When the detected electrical signal is greater than or equal to 0.39 mA and less than or equal to 0.41 mA, the controller 28 keeps the number of the light-emitting elements 62 turned on by the light source 60 unchanged, so as to avoid the controller 28 from having a slight change or error due to the detected electrical signal Frequently adjusting the number of light-emitting elements 62 that keep the light source 60 turned on interferes with the operation of the time-of-flight module 20 and increases the complexity of the control logic of the time-of-flight module 20.

In some embodiments, the controller 28 controls the working current of the light source 60 according to the detected electrical signal and the calibrated electrical signal, and the controller 28 controls the number of light-emitting elements 62 turned on by the light source 60 according to the detected electrical signal and the calibrated electrical signal, both Can be used in combination. When the difference between the detected electrical signal and the calibrated electrical signal is large, for example, greater than a certain electrical signal threshold, the controller 28 controls the number of light-emitting elements 62 turned on by the light source 60 according to the detected electrical signal and the calibrated electrical signal; The difference between the signal and the calibration electrical signal is small, for example, when it is less than a certain electrical signal threshold, the controller 28 adjusts the working current of the light source 60 according to the detected electrical signal and the calibration electrical signal. It can be understood that when the difference between the detected electrical signal and the calibrated electrical signal is large, it is faster and more effective to directly adjust the number of the light-emitting elements 62 turned on by the light source 60, and when the difference between the detected electrical signal and the calibrated electrical signal is relatively fast For small hours, fine adjustment of the working current of the light source 60 is sufficient.

Please refer to FIGS. 10 and 11. The electronic device 100 according to the embodiment of the present application includes a casing 10 and a time-of-flight module 20. The electronic device 100 may be a mobile phone, a tablet computer, a game console, a smart watch, a headset device, a drone, etc. The embodiment of the present application is described using the electronic device 100 as a mobile phone. It can be understood that the specific form of the electronic device 100 is Not limited to mobile phones.

The casing 10 can be used as a mounting carrier for the functional components of the electronic device 100. The casing 10 can provide protection for the functional components from dust, water, and drops. The functional components can be the display screen 30, the visible light camera 40, and the receiver 50, etc. . In the embodiment of the present application, the cabinet 10 includes a main body 11 and a movable support 12. The movable support 12 can move relative to the main body 11 under the driving of a driving device. For example, the movable support 12 can slide relative to the main body 11 to slide. Enter into the main body 11 (as shown in FIG. 10) or slide out from the main body 11 (as shown in FIG. 11). Some functional elements (such as the display 30) can be installed on the main body 11, and other functional elements (such as the time of flight module 20, the visible light camera 40, and the receiver 50) can be installed on the movable bracket 12, and the movable bracket 12 can be moved. The other part of the functional element is driven to retract into or protrude from the main body 11.

The time of flight module 20 is mounted on the chassis 10. Specifically, the casing 10 may be provided with an acquisition window, and the time-of-flight module 20 is installed in alignment with the acquisition window so that the time-of-flight module 20 acquires depth information. In the embodiment of the present application, the time-of-flight module 20 is installed on the movable bracket 12. When the user needs to use the time-of-flight module 20, the user can trigger the movable bracket 12 to slide out from the main body 11 to drive the time-of-flight module 20. Extending from the main body 11, when the time-of-flight module 20 is not needed, the movable bracket 12 can be triggered to slide into the main body 11 to drive the time-of-flight module 20 to retract into the main body 11. Of course, FIG. 10 and FIG. 11 are only examples of a specific form of the casing 10, and cannot be understood as a limitation on the casing 10 of the present application. For example, in another example, the acquisition window opened on the casing 10 The time-of-flight module 20 may be fixed and aligned with the acquisition window. In another example, the time-of-flight module 20 is fixed below the display screen 30.

12 to FIG. 16, the time-of-flight module 20 includes a first substrate assembly 21, a spacer 22, a first optical device 23, a second optical device 24, a photodetector 27, and a controller 28. The first substrate assembly 21 includes a first substrate 211 and a flexible circuit board 212 connected to each other. The spacer 22 is disposed on the first substrate 211. The first optical device 23 is disposed on the cushion block 22. The flexible circuit board 212 is bent and one end of the flexible circuit board 212 is connected to the first substrate 211 and the other end is connected to the first optical device 23. The second optical device 24 is disposed on the first substrate 211. The second optical device 24 includes a casing 241 and an optical element 242 disposed on the casing 241. The casing 241 and the cushion block 22 are integrally connected.

In the electronic device 100 according to the embodiment of the present application, since the first optical device 23 is disposed on the spacer 22, the spacer 22 can raise the height of the first optical device 23, so that the first optical device 23 and the second optical device 24 The difference in height is reduced to prevent one of the two (the first optical device 23 and the second optical device 24) from being blocked by the other when transmitting or receiving an optical signal. When the first optical device 23 is a light transmitter 23 and the second optical device 24 is a light receiver 24, the light signal emitted by the light transmitter 23 is not easily blocked by the light receiver 24, so that the light signal can be completely irradiated to the measured object. When the first optical device 23 is a light receiver and the second optical device 24 is a light transmitter, external light signals will not be blocked by the light transmitter before entering the light receiver.

Since the light transmitter 23 is disposed on the pad 22, the pad 22 can raise the height of the light transmitter 23, thereby increasing the height of the light emitting surface of the light transmitter 23, and the light signal emitted by the light transmitter 23 cannot be easily received by the light receiver 24. Blocking, so that the light signal can be completely irradiated on the measured object.

The following description will be made by taking the first optical device 23 as the light transmitter 23 and the second optical device 24 as the light receiver 24 as an example. It can be understood that, in other embodiments, the first optical device 23 may be a light receiver, and the second optical device 24 may be a light transmitter.

Specifically, the first substrate assembly 21 includes a first substrate 211 and a flexible circuit board 212. The first substrate 211 may be a printed circuit board or a flexible circuit board. The control circuit of the time of flight module 20 may be laid on the first substrate 211. One end of the flexible circuit board 212 can be connected to the first substrate 211, and the flexible circuit board 212 can be bent at a certain angle, so that the relative positions of the devices connected at both ends of the flexible circuit board 212 can be selected.

Referring to FIGS. 12 and 16, the pad 22 is disposed on the first substrate 211. In one example, the pad 22 is in contact with the first substrate 211 and is carried on the first substrate 211. Specifically, the pad 22 may be combined with the first substrate 211 by means of adhesion or the like. The material of the spacer 22 may be metal, plastic, or the like. In the embodiment of the present application, a surface where the pad 22 is combined with the first substrate 211 may be a flat surface, and a surface opposite to the combined surface of the pad 22 may also be a flat surface, so that when the light emitter 23 is disposed on the pad 22 Has better stability.

The light transmitter 23 is configured to emit an optical signal outwards. Specifically, the light signal may be infrared light, and the light signal may be a lattice spot emitted to the object to be measured. The light signal is emitted from the light transmitter 23 at a certain divergence angle. . The light transmitter 23 is disposed on the spacer 22. In the embodiment of the present application, the light transmitter 23 is disposed on the side of the spacer 22 opposite to the first substrate 211, or in other words, the spacer 22 connects the first substrate 211. The light emitter 23 is spaced apart from the light emitter 23 so that a height difference is formed between the light emitter 23 and the first substrate 211. The light transmitter 23 is also connected to the flexible circuit board 212. The flexible circuit board 212 is bent, one end of the flexible circuit board 212 is connected to the first substrate 211, and the other end is connected to the light transmitter 23, so that the control signal of the light transmitter 23 is removed The first substrate 211 is transmitted to the light transmitter 23, or a feedback signal of the light transmitter 23 (for example, time information, frequency information of the light signal emitted by the light transmitter 23, temperature information of the light transmitter 23, etc.) is transmitted to the first Substrate 211.

Please refer to FIG. 12, FIG. 13, and FIG. 15. The optical receiver 24 is configured to receive an optical signal emitted by the reflected optical transmitter 23. The light receiver 24 is disposed on the first substrate 211, and the contact surface between the light receiver 24 and the first substrate 211 is substantially flush with the contact surface between the pad 22 and the first substrate 211 (that is, the installation starting point of the two is On the same plane). Specifically, the light receiver 24 includes a housing 241 and an optical element 242. The casing 241 is disposed on the first substrate 211, and the optical element 242 is disposed on the casing 241. The casing 241 may be a lens holder and a lens barrel of the light receiver 24, and the optical element 242 may be a lens disposed in the casing 241. And other components. Further, the light receiver 24 may further include a photosensitive chip (not shown). The optical signal reflected by the measured object is irradiated into the photosensitive chip through the optical element 242, and the photosensitive chip responds to the optical signal. The time-of-flight module 20 calculates the time difference between the light signal emitted by the light transmitter 23 and the light sensor receiving the light signal reflected by the measured object, and further obtains the depth information of the measured object, which can be used for distance measurement, For generating depth images or for 3D modeling. In the embodiment of the present application, the housing 241 and the cushion block 22 are integrally connected. Specifically, the housing 241 and the spacer 22 may be integrally formed, and the housing 241 and the spacer 22 may be mounted on the first substrate 211 together for easy installation. For example, the housing 241 and the spacer 22 are made of the same material and are injection-molded. Integrated cutting, cutting, etc .; or the materials of the housing 241 and the pad 22 are different, and the two are integrally formed by two-color injection molding. The housing 241 and the spacer 22 may also be separately formed, and the two form a matching structure. When assembling the time-of-flight module 20, the housing 241 and the spacer 22 may be connected into one body, and then jointly disposed on the first substrate 211. It is also possible to firstly arrange one of the housing 241 and the pad 22 on the first substrate 211, and then arrange the other on the first substrate 211 and connect them as a whole.

In the electronic device 100 according to the embodiment of the present application, since the light emitter 23 is disposed on the cushion block 22, the cushion block 22 can heighten the height of the light emitter 23, thereby increasing the height of the light emitting surface of the light emitter 23, and the light emitter 23 The emitted light signal is not easily blocked by the light receiver 24, so that the light signal can be completely irradiated on the measured object. The exit surface of the light transmitter 23 may be flush with the entrance surface of the light receiver 24, or the exit surface of the light transmitter 23 may be slightly lower than the entrance surface of the light receiver 24, or it may be the exit surface of the light transmitter 23 Slightly higher than the incident surface of the light receiver 24.

Please refer to FIGS. 14 and 16. In some embodiments, the first substrate assembly 21 further includes a reinforcing plate 213. The reinforcing plate 213 is coupled to a side of the first substrate 211 opposite to the pad 22. The reinforcing plate 213 may cover one side of the first substrate 211, and the reinforcing plate 213 may be used to increase the strength of the first substrate 211 and prevent deformation of the first substrate 211. In addition, the reinforcing plate 213 may be made of a conductive material, such as a metal or an alloy. When the time-of-flight module 20 is mounted on the electronic device 100, the reinforcing plate 213 may be electrically connected to the casing 10 to make the reinforcing plate 213. Grounding and effectively reducing the interference of static electricity from external components on the time of flight module 20.

Please refer to FIGS. 16 to 18. In some embodiments, the cushion block 22 includes a protruding portion 225 protruding from the side edge 2111 of the first substrate 211, and the flexible circuit board 212 is bent around the protruding portion 225. Specifically, a part of the cushion block 22 is directly carried on the first substrate 211, and another part is not in direct contact with the first substrate 211, and protrudes from the side edge 2111 of the first substrate 211 to form a protruding portion 225. The flexible circuit board 212 may be connected to the side edge 2111, and the flexible circuit board 212 is bent around the protrusion 225, or the flexible circuit board 212 is bent so that the protrusion 225 is located in a space surrounded by the flexible circuit board 212. Inside, when the flexible circuit board 212 is subjected to an external force, the flexible circuit board 212 will not collapse inward and cause excessive bending, which will cause damage to the flexible circuit board 212.

Further, as shown in FIG. 17, in some embodiments, the outer surface 2251 of the protruding portion 225 is a smooth curved surface (for example, the outer surface of a cylinder, etc.), that is, the outer surface 2251 of the protruding portion 225 does not form a curvature. Suddenly, even if the flexible circuit board 212 is bent over the outer side 2251 of the protruding portion 225, the degree of bending of the flexible circuit board 212 will not be too large, which further ensures the integrity of the flexible circuit board 212.

Please refer to FIGS. 12 to 14. In some embodiments, the time-of-flight module 20 further includes a connector 26 connected to the first substrate 211. The connector 26 is used to connect the first substrate assembly 21 and an external device. The connector 26 and the flexible circuit board 212 are respectively connected to opposite ends of the first substrate 211. The connector 26 may be a connection base or a connector. When the time-of-flight module 20 is installed in the casing 10, the connector 26 may be connected to the main board of the electronic device 100 so that the time-of-flight module 20 is electrically connected to the main board. The connector 26 and the flexible circuit board 212 are respectively connected to opposite ends of the first substrate 211. For example, the connectors 26 and the flexible circuit board 212 may be respectively connected to the left and right ends of the first substrate 211, or respectively connected to the front and rear ends of the first substrate 211.

Please refer to FIGS. 13 and 14. In some embodiments, the light transmitter 23 and the light receiver 24 are arranged along a straight line L, and the connector 26 and the flexible circuit board 212 are located on opposite sides of the straight line L, respectively. It can be understood that, since the light transmitter 23 and the light receiver 24 are arranged in an array, the size of the time-of-flight module 20 may be larger in the direction of the straight line L. The connector 26 and the flexible circuit board 212 are respectively disposed on opposite sides of the straight line L, which will not increase the size of the time-of-flight module 20 in the direction of the straight line L, thereby facilitating the installation of the time-of-flight module 20 on the electronic device 100. On the chassis 10.

Referring to FIGS. 16 and 17, in some embodiments, a receiving cavity 223 is defined on a side where the cushion block 22 is combined with the first substrate 211. The time-of-flight module 20 further includes an electronic component 25 disposed on the first substrate 211, and the electronic component 25 is contained in the receiving cavity 223. The electronic component 25 may be an element such as a capacitor, an inductor, a transistor, a resistor, etc. The electronic component 25 may be electrically connected to a control line laid on the first substrate 211 and used to drive or control the operation of the light transmitter 23 or the light receiver 24. The electronic component 25 is contained in the containing cavity 223, and the space in the cushion block 22 is used reasonably. It is not necessary to increase the width of the first substrate 211 to set the electronic component 25, which is beneficial to reducing the overall size of the time-of-flight module 20. The number of the receiving cavities 223 may be one or more, and the plurality of receiving cavities 223 may be spaced apart from each other. When the pad 22 is installed, the positions of the receiving cavity 223 and the electronic component 25 may be aligned and the pad 22 may be disposed at On the first substrate 211.

Please refer to FIG. 16 and FIG. 18. In some embodiments, the cushion block 22 is provided with an avoiding through hole 224 communicating with at least one receiving cavity 223, and at least one electronic component 25 extends into the avoiding through hole 224. It can be understood that when the electronic component 25 needs to be contained in the containing cavity 223, the height of the electronic component 25 is required to be not higher than the height of the containing cavity 223. For the electronic component 25 having a height higher than the receiving cavity 223, an avoiding through hole 224 corresponding to the receiving cavity 223 may be provided, and the electronic component 25 may partially extend into the avoiding through hole 224, so as not to increase the height of the spacer 22 The electronic component 25 is arranged.

Referring to FIG. 16, in some embodiments, the light emitter 23 includes a second substrate assembly 231, a light source assembly 232, and a housing 233. The second substrate assembly 231 is disposed on the pad 22, and the second substrate assembly 231 is connected to the flexible circuit board 212. The light source assembly 232, the light detector 27, and the controller 28 are disposed on the second substrate assembly 231, and the light source assembly 232 is configured to emit a light signal. The casing 233 is disposed on the second substrate assembly 231. The casing 233 is formed with a receiving space 2331. The receiving space 2331 can be used for receiving the light source module 232. The flexible circuit board 212 may be detachably connected to the second substrate assembly 231. The light source assembly 232 is electrically connected to the second substrate assembly 231. The casing 233 may be bowl-shaped as a whole, and the opening of the casing 233 is disposed on the second substrate assembly 231 downwardly, so as to receive the light source assembly 232 in the accommodation space 2331. In the embodiment of the present application, a light outlet 2332 corresponding to the light source component 232 is provided on the housing 233. The optical signal emitted from the light source component 232 passes through the light outlet 2332 and is emitted. The light signal can pass directly through the light outlet 2332. It can also pass through the optical outlet 2332 after changing the optical path through other optical devices.

Please continue to refer to FIG. 16. In some embodiments, the second substrate assembly 231 includes a second substrate 2311 and a reinforcing member 2312. The second substrate 2311 is connected to the flexible circuit board 212. The light source assembly 232 and the reinforcing member 2312 are disposed on opposite sides of the second substrate 2311. A specific type of the second substrate 2311 may be a printed circuit board or a flexible circuit board, and a control circuit may be laid on the second substrate 2311. The reinforcing member 2312 may be fixedly connected to the second substrate 2311 by means of gluing, riveting, or the like. The reinforcing member 2312 may increase the overall strength of the second substrate assembly 231. When the light emitter 23 is disposed on the spacer 22, the reinforcing member 2312 can directly contact the spacer 22, the second substrate 2311 is not exposed to the outside, and does not need to be in direct contact with the spacer 22, and the second substrate 2311 is not easily affected. Contamination by dust, etc.

In the embodiment shown in FIG. 16, the reinforcing member 2312 and the cushion block 22 are formed separately. When assembling the time-of-flight module 20, the spacer 22 may be first mounted on the first substrate 211. At this time, the two ends of the flexible circuit board 212 are respectively connected to the first substrate 211 and the second substrate 2311, and the flexible circuit board 212 may Do not bend first (as shown in Figure 18). The flexible circuit board 212 is then bent, so that the reinforcing member 2312 is disposed on the cushion block 22.

Of course, in other embodiments, the reinforcing member 2312 and the spacer 22 may be integrally formed, for example, integrally formed by a process such as injection molding. When assembling the time-of-flight module 20, the spacer 22 and the light emitter 23 may be installed together. On the first substrate 211.

Referring to FIG. 18, in some embodiments, a first positioning member 2313 is formed on the reinforcing member 2312. The cushion block 22 includes a body 221 and a second positioning member 222. The second positioning member 222 is formed on the body 221. When the second substrate assembly 231 is disposed on the cushion block 22, the first positioning member 2313 cooperates with the second positioning member 222. Specifically, after the first positioning member 2313 cooperates with the second positioning member 222, the relative movement between the second substrate assembly 231 and the cushion block 22 can be effectively restricted. The specific types of the first positioning member 2313 and the second positioning member 222 can be selected according to needs. For example, the first positioning member 2313 is a positioning hole formed in the reinforcing member 2312, and the second positioning member 222 is a positioning column. Protrude into the positioning hole so that the first positioning member 2313 and the second positioning member 222 cooperate with each other; or the first positioning member 2313 is a positioning column formed on the reinforcing member 2312, and the second positioning member 222 is a positioning hole and the positioning column Project into the positioning hole so that the first positioning member 2313 and the second positioning member 222 cooperate with each other; or the number of the first positioning member 2313 and the second positioning member 222 are multiple, and part of the first positioning member 2313 is a positioning hole, Part of the second positioning member 222 is a positioning column, part of the first positioning member 2313 is a positioning column, and part of the second positioning member 222 is a positioning hole. The positioning column projects into the positioning hole so that the first positioning member 2313 and the second positioning member 222 work cooperatively.

The structure of the light source component 232 will be described as an example below:

Referring to FIG. 19, the light source assembly 232 includes a light source 60, a lens barrel 70, a diffuser 80 and a protective cover 90. The light source 60 is connected to the second substrate assembly 231. The lens barrel 70 includes a first surface 71 and a second surface 72 opposite to each other. The lens barrel 11 defines a receiving cavity 75 penetrating the first surface 71 and the second surface 72. The first surface 71 is recessed toward the second surface 72 to form a mounting groove 76 communicating with the receiving cavity 75. The diffuser 80 is installed in the mounting groove 76. The protective cover 90 is mounted on the side where the first surface 71 of the lens barrel 70 is located, and the diffuser 80 is sandwiched between the protective cover 90 and the bottom surface 77 of the mounting groove 76.

The protective cover 90 can be mounted on the lens barrel 70 by means of screw connection, engagement, and fastener connection. For example, referring to FIG. 19, when the protective cover 90 includes a top wall 91 and a protective side wall 92, the protective cover 90 (protective side wall 92) is provided with internal threads and the lens barrel 70 is provided with external threads. The internal thread of 90 is screwed with the external thread of the lens barrel 70 to mount the protective cover 90 on the lens barrel 70; or, referring to FIG. 20, when the protective cover 90 includes a top wall 91, the protective cover 90 (top wall 91) A locking hole 95 is opened, and a hook 73 is provided at an end of the lens barrel 70. When the protective cover 90 is provided on the lens barrel 70, the hook 73 is inserted into the locking hole 95 so that the protective cover 90 is mounted on the lens barrel 70 21; when the protective cover 90 includes a top wall 91 and a protective side wall 92, the protective cover 90 (protective side wall 92) is provided with a locking hole 95, and a hook 73 is provided on the lens barrel 70. When the protective cover 90 is disposed on the lens barrel 70, the hook 73 is inserted into the hole 95 to mount the protective cover 90 on the lens barrel 70; or, referring to FIG. 22, when the protective cover 90 includes the top wall 91, The end of the lens barrel 70 is provided with a first positioning hole 74, the protective cover 90 (top wall 91) is provided with a second positioning hole 93 corresponding to the first positioning hole 74, and the fastener 94 passes through the second positioning hole 93 And locked A first positioning hole 74 to the protective cover 90 is mounted on the lens barrel 70. When the protective cover 90 is mounted on the lens barrel 70, the protective cover 90 is in contact with the diffuser 80 and the diffuser 80 is in contact with the bottom surface 77, so that the diffuser 80 is sandwiched between the protective cover 90 and the bottom surface 77.

The light source assembly 232 is provided with a mounting groove 76 on the lens barrel 70 and the diffuser 80 is installed in the mounting groove 76, and is mounted on the lens barrel 70 through a protective cover 90 to clamp the diffuser 80 between the protective cover 90 and the installation. Between the bottom surfaces 77 of the grooves 76, the diffuser 80 is actually fixed to the lens barrel 70. Furthermore, the glue is not used to fix the diffuser 80 on the lens barrel 70, so that the glue can be solidified on the surface of the diffuser 80 and the microstructure of the diffuser 80 can be prevented from being volatilized. The diffusor 80 falls off from the lens barrel 70 when aging deteriorates the adhesion.

In the description of this specification, reference is made to the terms "certain embodiments", "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" The description means that a specific feature, structure, material, or characteristic described in combination with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same implementation or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more implementations or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, unless specifically defined otherwise.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application. Those skilled in the art may, within the scope of the present application, understand the above. The embodiments are subject to change, modification, replacement, and modification, and the scope of the present application is defined by the claims and their equivalents.

Claims

A control method of a time-of-flight module, wherein the time-of-flight module includes a light transmitter and a light detector, and the control method includes:

Obtaining calibration electrical signals;

Controlling the optical transmitter to emit an optical signal;

Controlling the light detector to convert the received light signal into a detection electric signal; and

Controlling an operating parameter of the optical transmitter according to the detection electrical signal and the calibration electrical signal.
The control method according to claim 1, wherein the step of obtaining a calibration electrical signal comprises:

Controlling the optical transmitters of the plurality of time-of-flight modules to emit the optical signals;

The light detectors controlling a plurality of time-of-flight modules respectively convert the received light signals emitted by the corresponding light transmitters of the time-of-flight module into a plurality of reference electrical signals; and

The calibration electrical signal is calculated based on a plurality of the reference electrical signals.
The control method according to claim 1, wherein the step of obtaining a calibration electrical signal comprises:

Controlling the optical transmitter of each of the time of flight modules to emit the optical signal; and

The light detector controlling each of the time-of-flight modules converts the received light signal emitted by the corresponding light transmitter of the time-of-flight module into an electrical signal as the calibration electrical signal ;

The step of controlling an operating parameter of the optical transmitter according to the detected electrical signal and the calibrated electrical signal includes:

Controlling an operating parameter of the optical transmitter according to the detection electrical signal and the corresponding calibration electrical signal.
The control method according to claim 1, wherein the step of obtaining a calibration electrical signal comprises:

Directly read the calibration electrical signals pre-stored in the time of flight module, and the calibration electrical signals are obtained according to the calibration of the light transmitter and the light detector in each of the time of flight modules; or The calibration electrical signal is obtained according to calibration of the light transmitter and the light detector in a plurality of the time-of-flight modules.
The control method according to claim 1, wherein the light transmitter comprises a light source, and the step of controlling the operating parameters of the light transmitter according to the detection electrical signal and the calibration electrical signal comprises:

The working current of the light source is controlled according to the detection electrical signal and the calibration electrical signal.
The control method according to claim 5, wherein the detection electrical signal and the calibration electrical signal are both current signals, and the control of the light source is performed according to the detection electrical signal and the calibration electrical signal. The steps of the current include:

Reducing the operating current of the light source when the detected electrical signal is greater than the calibrated electrical signal; and

When the detected electrical signal is smaller than the calibrated electrical signal, an operating current of the light source is increased.
The control method according to claim 1, wherein the light emitter includes a light source, the light source includes a plurality of light emitting elements, and the light emission is controlled according to the detection electrical signal and the calibration electrical signal. The steps of the working parameters of the controller include:

Controlling the number of the light-emitting elements that the light source is turned on according to the detection electrical signal and the calibration electrical signal.
A controller for a time-of-flight module, characterized in that the time-of-flight module includes a light transmitter and a light detector, and the controller is used for:

Obtaining calibration electrical signals;

Controlling the optical transmitter to emit an optical signal;

Controlling the light detector to convert the received light signal into a detection electric signal; and

Controlling an operating parameter of the optical transmitter according to the detection electrical signal and the calibration electrical signal.
The controller according to claim 8, wherein the controller is further configured to:

Controlling the optical transmitters of the plurality of time-of-flight modules to emit the optical signals;

The light detectors controlling a plurality of time-of-flight modules respectively convert the received light signals emitted by the corresponding light transmitters of the time-of-flight module into a plurality of reference electrical signals; and

The calibration electrical signal is calculated based on a plurality of the reference electrical signals.
The controller according to claim 8, wherein the controller is further configured to:

Controlling the optical transmitter of each of the time-of-flight modules to emit the optical signal;

The light detector controlling each of the time-of-flight modules converts the received light signal emitted by the corresponding light transmitter of the time-of-flight module into an electrical signal as the calibration electrical signal ;with

Controlling an operating parameter of the optical transmitter according to the detection electrical signal and the corresponding calibration electrical signal.
The controller according to claim 8, wherein the controller is further configured to:

Directly read the calibration electrical signals pre-stored in the time of flight module, and the calibration electrical signals are obtained according to the calibration of the light transmitter and the light detector in each of the time of flight modules; or The calibration electrical signal is obtained according to calibration of the light transmitter and the light detector in a plurality of the time-of-flight modules.
The controller according to claim 8, wherein the light emitter comprises a light source, and the controller is further configured to:

The working current of the light source is controlled according to the detection electrical signal and the calibration electrical signal.
The controller according to claim 12, wherein the detection electrical signal and the calibration electrical signal are both current signals, and the controller is further configured to:

Reducing the operating current of the light source when the detected electrical signal is greater than the calibrated electrical signal; and

When the detected electrical signal is smaller than the calibrated electrical signal, an operating current of the light source is increased.
The controller according to claim 8, wherein the light emitter comprises a light source, the light source comprises a plurality of light emitting elements, and the controller is further configured to:

Controlling the number of the light-emitting elements that the light source is turned on according to the detection electrical signal and the calibration electrical signal.
A time-of-flight module, characterized in that the time-of-flight module includes:

A light transmitter for transmitting an optical signal;

A light detector for converting the received light signal into a detection electrical signal; and

A controller configured to: obtain a calibrated electrical signal; control the optical transmitter to emit an optical signal; control the light detector to convert the received optical signal into a detected electrical signal; and according to the detected electrical signal The signal and the calibration electrical signal control the operating parameters of the optical transmitter.
The time-of-flight module according to claim 15, wherein the controller is further configured to:

Controlling the optical transmitters of the plurality of time-of-flight modules to emit the optical signals;

The light detectors controlling a plurality of time-of-flight modules respectively convert the received light signals emitted by the corresponding light transmitters of the time-of-flight module into a plurality of reference electrical signals; and

The calibration electrical signal is calculated based on a plurality of the reference electrical signals.
The time-of-flight module according to claim 15, wherein the controller is further configured to:

Controlling the optical transmitter of each of the time-of-flight modules to emit the optical signal;

The light detector controlling each of the time-of-flight modules converts the received light signal emitted by the corresponding light transmitter of the time-of-flight module into an electrical signal as the calibration electrical signal ;with

Controlling an operating parameter of the optical transmitter according to the detection electrical signal and the corresponding calibration electrical signal.
The time-of-flight module according to claim 15, wherein the controller is further configured to:

Directly read the calibration electrical signals pre-stored in the time of flight module, and the calibration electrical signals are obtained according to the calibration of the light transmitter and the light detector in each of the time of flight modules; or The calibration electrical signal is obtained according to calibration of the light transmitter and the light detector in a plurality of the time-of-flight modules.
The time-of-flight module according to claim 15, wherein the light transmitter comprises a light source, and the controller is further configured to control the work of the light source according to the detection electrical signal and the calibration electrical signal. Current.
The time-of-flight module according to claim 19, wherein the detection electrical signal and the calibration electrical signal are both current signals, and the controller is further configured to:

Reducing the operating current of the light source when the detected electrical signal is greater than the calibrated electrical signal; and

When the detected electrical signal is smaller than the calibrated electrical signal, an operating current of the light source is increased.
The time of flight module according to claim 15, wherein the light emitter comprises a light source, the light source comprises a plurality of light emitting elements, and the controller is further configured to:

Controlling the number of the light-emitting elements that the light source is turned on according to the detection electrical signal and the calibration electrical signal.
An electronic device is characterized in that the electronic device includes:

Chassis; and

Time-of-flight module, the time-of-flight module is disposed on the casing; the time-of-flight module includes:

A light transmitter for transmitting an optical signal;

A light detector for converting the received light signal into a detection electrical signal; and

A controller configured to: obtain a calibrated electrical signal; control the optical transmitter to emit an optical signal; control the light detector to convert the received optical signal into a detected electrical signal; and according to the detected electrical signal The signal and the calibration electrical signal control the operating parameters of the optical transmitter.
The electronic device according to claim 22, wherein the controller is further configured to:

Controlling the optical transmitters of the plurality of time-of-flight modules to emit the optical signals;

The light detectors controlling a plurality of time-of-flight modules respectively convert the received light signals emitted by the corresponding light transmitters of the time-of-flight module into a plurality of reference electrical signals; and

The calibration electrical signal is calculated based on a plurality of the reference electrical signals.
The electronic device according to claim 22, wherein the controller is further configured to:

Controlling the optical transmitter of each of the time-of-flight modules to emit the optical signal;

The light detector controlling each of the time-of-flight modules converts the received light signal emitted by the corresponding light transmitter of the time-of-flight module into an electrical signal as the calibration electrical signal ;with

Controlling an operating parameter of the optical transmitter according to the detection electrical signal and the corresponding calibration electrical signal.
The electronic device according to claim 22, wherein the controller is further configured to:

Directly read the calibration electrical signals pre-stored in the time of flight module, and the calibration electrical signals are obtained according to the calibration of the light transmitter and the light detector in each of the time of flight modules; or The calibration electrical signal is obtained according to calibration of the light transmitter and the light detector in a plurality of the time-of-flight modules.
The electronic device according to claim 22, wherein the light emitter comprises a light source, and the controller is further configured to control an operating current of the light source according to the detection electrical signal and the calibration electrical signal.
The electronic device according to claim 26, wherein the detection electrical signal and the calibration electrical signal are both current signals, and the controller is further configured to:

Reducing the operating current of the light source when the detected electrical signal is greater than the calibrated electrical signal; and

When the detected electrical signal is smaller than the calibrated electrical signal, an operating current of the light source is increased.
The electronic device according to claim 22, wherein the light emitter comprises a light source, the light source comprises a plurality of light emitting elements, and the controller is further configured to:

Controlling the number of the light-emitting elements that the light source is turned on according to the detection electrical signal and the calibration electrical signal.