CN111711749A - Laser ranging device, camera module, electronic equipment and control method - Google Patents
Laser ranging device, camera module, electronic equipment and control method Download PDFInfo
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- CN111711749A CN111711749A CN202010486537.9A CN202010486537A CN111711749A CN 111711749 A CN111711749 A CN 111711749A CN 202010486537 A CN202010486537 A CN 202010486537A CN 111711749 A CN111711749 A CN 111711749A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
- H04N23/671—Focus control based on electronic image sensor signals in combination with active ranging signals, e.g. using light or sound signals emitted toward objects
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Abstract
The application discloses laser rangefinder, camera module, electronic equipment and control method, wherein, laser rangefinder includes signal transmitter, signal receiver and lens reflection group. Wherein the signal emitter is used for emitting optical signals; the signal receiver is used for receiving the optical signal transmitted by the signal transmitter; the lens reflection group is arranged on a propagation path of the optical signal of the signal transmitter and the signal receiver, and the lens reflection group is used for changing the length of the propagation path of the optical signal between the signal transmitter and the signal receiver. Still provide a camera subassembly, this camera subassembly includes foretell laser rangefinder and camera module. An electronic device is also provided, and the electronic device comprises a circuit board and the camera assembly. A control method of the electronic device is also provided. Through the mode, the error that produces among the range finding process can be reduced to this application.
Description
Technical Field
The present application relates to the field of electronic devices, and in particular, to a laser distance measuring device, a camera module, an electronic device, and a control method.
Background
At present, terminal equipment can adopt the mode of laser focusing when shooing, also records the time that the laser instrument sends out and passes through the reflector and then is received by receiving module, and then calculates the distance between reflector and the terminal equipment, and then the camera can focus according to distance control focus motor and in order to obtain clear image.
The method of laser ranging can be used for measuring reflectors with certain distances, but for reflectors with short distances, the terminal equipment cannot ignore time errors generated in the ranging process when the terminal equipment is used for measuring the reflectors with the short distances.
Disclosure of Invention
The technical problem that this application mainly solved provides a laser rangefinder, camera module, electronic equipment and control method, can reduce the influence of the time error that produces among the range finding process.
In order to solve the technical problem, the application adopts a technical scheme that: provided is a laser ranging apparatus for an electronic device, including: the signal transmitter, the signal receiver and the lens transmitting group; wherein the signal emitter is used for emitting optical signals;
the signal receiver is used for receiving the optical signal transmitted by the signal transmitter;
the lens reflection group is arranged on a propagation path of the optical signal of the signal transmitter and the signal receiver, and the lens reflection group is used for changing the length of the propagation path of the optical signal between the signal transmitter and the signal receiver.
In order to solve the above technical problem, another technical solution adopted by the present application is: the camera module is arranged adjacent to the laser ranging device or arranged in an integral structure, and the camera module controls a focusing motor to focus through a ranging signal of the laser ranging device.
In order to solve the above technical problem, another technical solution adopted by the present application is: the electronic equipment comprises a circuit board and the camera assembly, wherein the camera assembly is coupled with the circuit board, and the circuit board is used for controlling the camera assembly to focus.
In order to solve the above technical problem, another technical solution adopted by the present application is: a control method based on the electronic equipment is provided, and the method comprises the following steps:
identifying the shooting state of the camera module;
controlling the mirror reflection group to be in a position state corresponding to the current shooting state;
controlling a signal transmitter to emit a laser beam;
and the control signal receiver receives the laser beam emitted by the signal emitter.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided an electronic device having stored program data executable by a processor to implement the control method described above.
The beneficial effect of this application is: be different from prior art's condition, this application is provided with signal transmitter, signal receiver and the lens reflection group that sets up between signal transmitter and signal receiver to make the propagation distance from the light signal of signal transmitter transmission to signal receiver changeable, and then can improve this application and utilize the accuracy nature of light signal range finding.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of a laser ranging device according to the present application;
FIG. 2 is a schematic structural diagram of a second embodiment of the laser ranging device of the present application;
FIG. 3 is a schematic structural diagram of a third embodiment of the laser ranging device of the present application;
FIG. 4 is a schematic structural diagram of a fourth embodiment of the laser ranging device of the present application;
FIG. 5 is a schematic structural diagram of a fifth embodiment of the laser ranging device of the present application;
FIG. 6 is a schematic structural diagram of a sixth embodiment of a laser ranging device according to the present application;
FIG. 7 is a schematic structural diagram of a seventh embodiment of a laser ranging device according to the present application;
FIG. 8 is a schematic structural diagram of an eighth embodiment of a laser ranging device according to the present application;
FIG. 9 is a schematic structural diagram of a ninth embodiment of the laser ranging device of the present application;
FIG. 10 is a schematic view of the control motor and the mirror plate;
FIG. 11 is a schematic diagram of the construction of one embodiment of a camera assembly;
FIG. 12 is a schematic structural diagram of another embodiment of a camera assembly;
FIG. 13 is a schematic diagram of an embodiment of an electronic device;
fig. 14 is a flowchart of a control method of the electronic device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the laser ranging device is applied to electronic equipment, wherein the electronic equipment can comprise a mobile phone, a tablet computer, a notebook computer, wearable equipment and the like, and the embodiment of the application takes the mobile phone as an example for description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a laser ranging device 80 according to a first embodiment of the present application. The laser ranging device 80 includes: signal transmitter 10, signal receiver 20 and mirror reflection group 30. Wherein, the signal transmitter 10 is used for transmitting an optical signal, and the signal receiver 20 is used for receiving the optical signal transmitted by the signal transmitter 10. The lens reflection group 30 is disposed on a propagation path of the optical signal of the signal emitter 10 and the signal receiver 20, and is used for changing a propagation path length of the optical signal between the signal emitter 10 and the signal receiver 20. It is noted that the terms "comprises" and "comprising," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
In one embodiment of the laser distance measuring device 80 of the present application, the mirror reflection set 30 is disposed between the signal emitter 10 and the reflector 70 that reflects the light signal emitted by the signal emitter 10. This application adopts laser emission light signal to carry out the communication, also adopts laser to carry out the communication promptly. Wherein, the signal transmitter 10 includes: a laser, an optical modulator and an optical transmitting antenna (not shown), the signal receiver 20 includes: an optical receiving antenna, an optical filter and a photodetector (not shown). The optical signal is reflected by the reflector 70 after being emitted by the laser emitter, and then converted into an electrical signal by the signal receiver 20, and the electrical signal is amplified and demodulated to be converted into original information, so that the original information corresponds to the optical signal of the signal emitter 10. In the embodiment of the present application, since the lens emitting group is disposed between the signal emitter 10 and the reflector 70 that reflects the light signal emitted by the signal emitter 10, that is, the light signal emitted by the signal emitter 10 is reflected by the lens emitting group before propagating to the reflector 70, so as to increase the propagation distance between the light signal from the signal emitter 10 to the reflector 70, and further increase the propagation time between the light signal from the signal emitter 10 to the signal receiver 20.
The signal reflection group includes at least one set of mirror reflection unit groups 310, and the light signal passes through the mirror reflection unit groups 310 to change the propagation path length. In the embodiment of the present application, the signal reflection group includes at least one set of mirror reflection unit groups 310, that is, multiple sets of mirror reflection unit groups 310 are arranged at the same distance, that is, the propagation time of multiple types of optical signals is corresponded. When the mirror reflection group 30 is not disposed between the signal emitter 10 and the signal receiver 20, that is, corresponding to the conventional distance measurement, for example, the distance between the signal emitter 10 and the reflector 70 may be greater than 30 cm. The present invention is applicable to a camera of the electronic device 60, that is, ranging that can be performed corresponding to a conventional distance. When one lens reflection unit is disposed in the lens reflection group 30, the distance between the corresponding camera and the reflector 70 is relatively short, that is, the distance between the corresponding signal emitter 10 and the reflector 70 is within 10cm to 30 cm. When two or even more sets of the lens reflection unit groups 310 are disposed in the lens reflection group 30, the distance between the camera and the reflector 70 may be very short, that is, the distance measurement in the ultramicro range state is corresponded, and the distance between the signal emitter 10 and the reflector 70 may be within 10 cm. The time that the laser travels in the above-mentioned distance is short, and the optical circuit processes the echo signal to estimate the object distance, which results in delay error and time measurement error, according to L-gx (T + Δ T)/2, where L is the propagation distance of the measured optical signal from the signal transmitter 10 to the signal receiver 20. C is the propagation distance of the optical signal in the atmosphere, T is the real propagation time of the laser, and Delta T is the time error generated in the distance measurement process. When Δ T is small enough relative to T, the effect on L will be low, and thus when the distance between the camera and the reflector 70 is small, the time of T will be small, Δ T will be non-negligible relative to T, and T needs to be increased, so that the effect of Δ T on the distance measurement L can be reduced.
The mirror reflection unit group 310 at least includes a first mirror 3110 and a second mirror 3120 that are sequentially disposed, at least one of the first mirror 3110 and the second mirror 3120 is adjustable in angle, and the purpose of changing the length of the propagation path of the optical signal through the mirror reflection unit group 310 is achieved by adjusting the relative angle between the first mirror 3110 and the second mirror 3120.
In the present embodiment, the lens emitting unit group may include a first mirror plate 3110 and a second mirror plate 3120. When the signal reflection set is disposed between the signal emitter 10 and the reflector 70 and the signal reflection set is required to increase the propagation distance of the optical signal, the angle of the first mirror 3110 is adjustable. When the angle of the first mirror plate 3110 is adjusted to be parallel to the second mirror plate 3120, the optical signal is reflected by the first mirror plate and the second mirror plate 3120, thereby increasing the propagation time of the optical signal from the signal emitter 10 to the reflector 70. When the angle of the first mirror 3110 is adjusted such that the light signal emitted from the signal emitter 10 does not pass through the first mirror 3110 and the second mirror 3120, the light signal is directly transmitted from the signal emitter 10 to the reflecting object 70 without being reflected. Specifically, the angle of the first mirror plate 3110 may also be adjusted so that the light signal passes only through the reflection of the first mirror plate 3110 and does not pass through the reflection of the second mirror plate 3120. It is understood that the position of the second mirror plate 3120 may be adjustable in other embodiments.
When the signal emitting assembly is disposed between the reflector 70 and the signal receiver 20, the first mirror 3110 may be adjustable or both the first mirror 3110 and the second mirror 3120 may be adjustable. Specifically, the optical signal is reflected by the reflector 70 and then sequentially reflected by the first mirror 3110 and the second mirror 3120, and then received by the signal receiver 20. In other embodiments, when the first mirror is adjustable, the optical signal may be passed through the first mirror and not the second mirror, or may be passed through neither the first mirror nor the second mirror. The specific application scenario may be set according to an actual application situation, and is not limited herein.
In an embodiment of the present application, please refer to fig. 1 and fig. 2, and fig. 2 is a schematic structural diagram of a second embodiment of a laser ranging device 80 of the present application. The mirror reflector group 310 includes a first mirror plate 3110, a second mirror plate 3120, a third mirror plate 3130, and a fourth mirror plate 3140; at least two of the first mirror plate 3110, the second mirror plate 3120, the third mirror plate 3130 and the fourth mirror plate 3140 are adjustable in position. The angles and positions of the first mirror plate 3110 and the fourth mirror plate 3140 for receiving the optical signals are adjustable, and the angles of the second mirror plate 3120 and the third mirror plate 3130 for receiving the optical signals are unchanged; the center positions of the first mirror plate 3110, the second mirror plate 3120, the third mirror plate 3130, and the fourth mirror plate 3140 constitute a rectangular structure. When the mirror reflection set 30 is located between the signal emitter 10 and the reflector 70, please continue to refer to fig. 1, the first mirror 3110 is disposed at an angle of at least 90 degrees with respect to the propagation path of the optical signal. The second mirror plate 3120 and the first mirror plate 3110 are disposed in parallel, the third mirror plate 3130 and the second mirror plate 3120 are disposed at an angle of 0-90 degrees, and the fourth mirror plate 3140 and the third mirror plate 3130 are disposed in parallel. The positions of the first mirror 3110 and the fourth mirror 3140 are adjustable, and since the optical signal sequentially passes through the first mirror 3110, the second mirror 3120, the third mirror 3130 and the fourth mirror 3140 for reflection, the direction of the optical signal toward the first mirror 3110 is the same as the direction of the optical signal emitted from the fourth mirror 3140. In other embodiments, for example, after the positions of the first mirror 3110 and the fourth mirror 3140 are adjusted, since there is no reflection of the first mirror 3110, the light signal does not pass through the second mirror 3120 and the third mirror 3130, and the light signal emitted from the signal emitter 10 is not transmitted and received by passing through the mirror emitting group. In other embodiments, the second mirror plate 3120 and/or the third mirror plate 3130 in addition to the first mirror plate 3110 and the fourth mirror plate 3140 may also be positionally adjustable. For example, the position of the third mirror plate 3130 is adjusted such that the light signal reflected by the second mirror plate 3120 is directed toward the reflector 70 without passing through the third mirror plate 3130 and the fourth mirror plate 3140. The principle of the lens reflection group 30 disposed between the reflector 70 and the signal receiver 20 is the same as that disposed between the signal emission group and the reflector 70, and it can be specifically referred to fig. 2, and is not described herein again.
Referring to fig. 3 and 4, fig. 3 is a schematic structural diagram of a laser ranging device 80 according to a third embodiment of the present application. Fig. 4 is a schematic structural diagram of a laser distance measuring device 80 according to a fourth embodiment of the present application. The lens-reflecting unit set 310 may also include a first mirror plate 3110, a second mirror plate 3120 and a third mirror plate 3130, wherein light rays sequentially pass through the first mirror plate 3110, the second mirror plate 3120 and the third mirror plate 3130. The direction of the light signal passing through the first mirror plate 3110 is the same as the direction of the light signal exiting through the second mirror plate 3120 and the third mirror plate 3130. At least one of which is angularly adjustable. That is, the position of the first mirror 3110 is adjustable, and the light signal does not pass through the first mirror 3110, the second mirror 3120 and the third mirror 3130. The positions of the first mirror plate 3110 and the second mirror plate 3120 may also be adjustable, and the second mirror plate 3120 is adjusted to be flush with the first mirror plate 3110, so that the optical signal may sequentially pass through the first mirror plate 3110 and the second mirror plate 3120, so as to increase the propagation time of the optical signal between the signal transmitter 10 and the signal receiver 20. The positions of the first mirror 3110, the second mirror 3120 and the third mirror 3130 may be adjustable, so as to adjust the first mirror 3110 to be flush with the third mirror 3130, such that the optical signal is reflected by the first mirror 3110 and then directly reflected to the third mirror 3130, and the position of the second mirror 3120 may be moved to other positions. Reference may be made to fig. 4 when the set of mirror reflectors 30 is positioned between the signal emitter 10 and the reflector 70, and to fig. 3 when the set of mirror reflectors 30 is positioned between the reflector 70 and the signal receiver 20.
Referring to fig. 5 and 6, fig. 5 is a schematic structural diagram of a laser ranging device 80 according to a fifth embodiment of the present application. Fig. 6 is a schematic structural diagram of a laser distance measuring device 80 according to a sixth embodiment of the present application. The mirror reflector set 310 may also include a first mirror 3110 and a second mirror 3120 for adjusting the propagation time of the optical signal, please refer to fig. 5, in which the mirror reflector set 30 corresponding to fig. 5 is disposed between the reflector 70 and the signal receiver 20. Fig. 6 corresponds to the mirror reflector assembly 30 disposed between the signal emitter 10 and the reflector 70.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a laser ranging device 80 according to a seventh embodiment of the present application. The mirror reflector group 310 may also include 5-mirror mirrors. Specifically, the lens sequentially comprises a first mirror 3110, a second mirror 3120, a third mirror 3130, a fourth mirror 3140 and a fifth mirror, and the position of at least one mirror is adjustable. For example, the position of the first mirror 3110 is adjustable, so that the light signal does not pass through the first mirror 3110 to the fifth mirror. Or the first mirror plate 3110 and the second mirror plate 3120 are adjustable, that is, the first mirror plate 3110 and the second mirror plate 3120 are adjusted to be flush with each other, so that the light signal only passes through the first mirror plate 3110 and the second mirror plate 3120, but not the third mirror plate 3130, the fourth mirror plate 3140 and the fifth mirror plate. The first mirror plate 3110, the second mirror plate 3120 and the third mirror plate 3130 may be adjustable to adjust to the states of the above three embodiments. The optical signal sequentially passes through the first mirror plate 3110, the second mirror plate 3120 and the third mirror plate 3130 to increase the propagation time of the optical signal from the signal transmitter 10 to the signal receiver 20. The positions of the first mirror plate 3110, the second mirror plate 3120, the third mirror plate 3130 and the fourth mirror plate 3140 may be adjusted to the states of the first and second embodiments.
In another embodiment of the present application, the set of mirror reflector units 310 may also include 6, 7 or even more mirror plates. The specific arrangement principle is the same as that of the above-mentioned embodiment, and the specific arrangement principle is not described again. It is understood that the number of the reflection groups of the lens unit can be 1, 2 or 3. When the lens reflection unit groups are provided with multiple groups, reference may be made to fig. 8 and 9, and fig. 8 is a schematic structural diagram of an eighth embodiment of the laser distance measuring device 80 of the present application. Wherein the mirror reflection unit group 310 includes a first mirror reflection unit group 320 and a second mirror reflection unit group 330. Fig. 9 is a schematic structural diagram of a ninth embodiment of a laser ranging device 80 according to the present application. The mirror unit reflection groups can be arranged in an up-and-down overlapping mode. In other embodiments, other overlay modes may be performed, which are not described herein.
Referring to fig. 10, fig. 10 is a schematic view of a matching structure of the control motor 40 and the reflective mirror. The mirror device further comprises a control motor 40, wherein the control motor 40 is connected with the lens with an adjustable position, the control motor 40 can drive the rotating shaft 410 to abut against the first reflecting lens 3110, and the first reflecting lens 3110 can rotate around the point a. It is understood that, when the mirror reflection unit group 310 includes the first mirror plate, the second mirror plate, the third mirror plate and the fourth mirror plate, and the positions of the first mirror plate and the fourth mirror plate are adjustable, the control motor 40 is connected to the first mirror plate and the fourth mirror plate. In other embodiments, the control motor 40 may be connected to each mirror of the mirror reflector group 310, and when the corresponding mirror needs to be moved, the control motor 40 moves the mirror, and the moved point is at point a shown in fig. 10, or other points may be selected to rotate, and the control motor 40 may drive the mirror to move the position, and the like. The manner in which the control motor 40 controls the lens to adjust the position is not limited herein. Technical solutions which do not require creative efforts based on the solutions listed in the present application are all within the protection scope of the present application.
Referring to fig. 11 and 12, fig. 11 is a schematic structural diagram of an embodiment of a camera head assembly 50, and fig. 12 is a schematic structural diagram of another embodiment of the camera head assembly 50. The present application further provides a camera assembly 50, an embodiment of the camera assembly 50 includes a camera module 510 and the above-mentioned laser distance measuring device 80, the camera module 510 and the laser distance measuring device 80 are adjacently disposed or integrally disposed, and the camera module 510 controls the focusing motor to focus through the distance measuring signal of the laser distance measuring device 80. Referring to fig. 11, the laser ranging device 80 is disposed on an end surface of the camera module 510. Referring to fig. 12, the laser ranging device 80 is disposed at one side of the camera module 510 facing the shooting end of the camera module 510.
An accommodating groove (not shown) is formed at one side of the laser ranging device 80, and the laser ranging device 80 is accommodated in the accommodating groove. In other embodiments, the laser ranging device 80 is integrally configured with the camera module 510.
Referring to fig. 13, fig. 13 is a schematic structural diagram of an embodiment of an electronic device 60. The present application further provides an electronic device 60, where an embodiment of the electronic device 60 includes a circuit board 610 and the camera head assembly 50 described above, the camera head assembly 50 is coupled to the circuit board 610, and the circuit board 610 is used to control the camera head assembly 50 to perform focusing. The laser ranging device 80 on the camera assembly 50 transmits data to the circuit board 610, and the circuit board 610 controls the camera module to focus through the focusing motor.
Referring to fig. 14, fig. 14 is a flowchart of a control method of an electronic device. The application also provides a control method based on the electronic equipment, which comprises the following steps:
s110: identifying the shooting state of the camera module;
identifying shooting states of the camera module, including a first state and a second state; the propagation path length of the optical signal received by the signal receiver in the first state is smaller than that in the second state. It will be appreciated that the first state may be a conventional state, corresponding to a light signal not passing through the path of travel between the set of mirror reflectors from the signal emitter to the signal receiver. And the second state corresponds to the state when the optical signal passes through the mirror reflection group, that is, the propagation distance of the optical signal in the second state from the signal transmitter to the signal receiver is greater than the propagation distance of the optical signal in the first state from the signal transmitter to the signal receiver.
In the present application, the shooting status may specifically include a normal shooting status, a macro status, and an ultra macro status. It can be understood that the optical signal emitted by the signal emitter corresponding to the normal shooting state is directly received by the signal receiver without passing through the mirror reflection group, and the length of the propagation path of the optical signal is not changed in the propagation process. The macro state corresponds to the reflection of the optical signal by the reflection group of the lens, and then the propagation distance of the optical signal between the signal transmitter and the signal receiver is increased. The lens reflection group comprises at least one lens reflection unit group, and if the plurality of lens reflection unit groups are arranged, the propagation time of an optical signal between the signal transmitter and the signal receiver can be longer, so that the optical signal corresponds to a ultramicro range state. Generally, most electronic devices are provided with a set of mirror reflector units, because the electronic devices are limited by the internal space of the electronic devices, but the set of mirror reflector units may include a plurality of reflective mirrors, and the plurality of reflective mirrors may be configured to distinguish the propagation time of the optical signal in the mirror reflector units, so as to distinguish the conventional state, the macro state and the macro state.
S120: controlling the mirror reflection group to be in a position state corresponding to the current shooting state;
for example, in a normal shooting state, the position of the mirror can be adjusted by controlling the motor, so that the light signal does not pass through the mirror reflector group. If the optical signal is in the macro state, the motor is controlled to adjust the reflective mirror so that the optical signal passes through the mirror reflective unit group to adjust the propagation time of the optical signal in the mirror reflective unit group. And if the current state is in the ultramicro range state, controlling the light signal to pass through the plurality of groups of lens reflecting unit groups by controlling the motor.
S130: controlling a signal transmitter to emit a laser beam;
s140: the control signal receiver receives the laser beam emitted by the signal emitter.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (14)
1. A laser ranging device for an electronic device, comprising:
a signal transmitter for transmitting an optical signal;
the signal receiver is used for receiving the optical signal transmitted by the signal transmitter;
the lens reflection group is arranged on a propagation path of the optical signal of the signal transmitter and the signal receiver, and the lens reflection group is used for changing the length of the propagation path of the optical signal between the signal transmitter and the signal receiver.
2. Laser rangefinder apparatus according to claim 1,
the lens reflection group is arranged between the signal emitter and a reflector for reflecting the light signal emitted by the signal emitter.
3. Laser rangefinder apparatus according to claim 1,
the lens reflection group is arranged between a reflector for reflecting the light signal emitted by the signal emitter and the signal receiver.
4. A laser rangefinder apparatus according to claim 2 or 3 wherein the signal reflection group comprises at least one set of mirror reflector groups through which light signals pass to vary the propagation path length.
5. The laser distance measuring device of claim 4, wherein the lens reflector unit group comprises at least a first reflector and a second reflector, which are sequentially disposed, at least one of the first reflector and the second reflector is adjustable in angle, and the relative angle between the first reflector and the second reflector is adjusted to change the length of the propagation path of the optical signal through the lens reflector unit group.
6. The laser rangefinder according to claim 5, wherein the mirror reflector unit group comprises a first mirror, a second mirror, a third mirror, and a fourth mirror;
at least two of the first reflective mirror, the second reflective mirror, the third reflective mirror and the fourth reflective mirror are adjustable in position.
7. The laser rangefinder apparatus of claim 6 wherein the angles and positions at which the first and fourth mirror segments receive the optical signals are adjustable, and the angles at which the second and third mirror segments receive the optical signals are constant; the central positions of the first reflective lens, the second reflective lens, the third reflective lens and the fourth reflective lens form a rectangular structure.
8. The laser rangefinder apparatus of claim 7 further comprising a control motor coupled to the first mirror and the fourth mirror respectively for controlling the angle and position at which the first mirror and the fourth mirror receive the optical signal.
9. The laser ranging device according to claim 1, wherein the mirror reflection unit group includes a first mirror reflection unit group and a second mirror reflection unit group, and the light signal sequentially passes through the first mirror reflection unit group and the second mirror reflection unit group to increase a propagation path length.
10. A camera assembly, comprising a camera module and the laser ranging device as claimed in any one of claims 1 to 9, wherein the camera module is disposed adjacent to the laser ranging device or integrally with the laser ranging device, and the camera module controls a focusing motor to focus through a ranging signal of the laser ranging device.
11. An electronic device comprising a circuit board and the camera assembly of claim 10, the camera assembly coupled to the circuit board, the circuit board configured to control the camera assembly to focus.
12. A method for controlling an electronic device according to claim 11, the method comprising:
identifying the shooting state of the camera module;
controlling the mirror reflection group to be in a position state corresponding to the current shooting state;
controlling a signal transmitter to emit a laser beam;
and the control signal receiver receives the laser beam emitted by the signal emitter.
13. The method for controlling the electronic device according to claim 12, wherein the identifying of the shooting status of the camera module includes a first status and a second status;
wherein a propagation path length of the optical signal received by the signal receiver in the first state is smaller than a propagation path length of the optical signal received by the signal receiver in the second state.
14. An electronic device, characterized in that program data are stored, which program data can be executed by a processor to implement the control method of any one of claims 12-13.
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| CN202010486537.9A CN111711749A (en) | 2020-06-01 | 2020-06-01 | Laser ranging device, camera module, electronic equipment and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112543284A (en) * | 2020-11-27 | 2021-03-23 | 维沃移动通信有限公司 | Focusing system, method and device |
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