Double-light-source focusing device and focusing method thereof

Abstract

The invention discloses a dual-light-source focusing device and a focusing method thereof, and relates to the technical field of focusing, the focusing device comprises a signal emission module, the signal emission module comprises a dot matrix light source and an area array light source, and the signal emission module emits a light source signal through the dot matrix light source or the area array light source; the signal receiving module comprises a signal receiver, and the signal receiver is used for receiving light source signals reflected after the dot matrix light source or the area array light source is emitted; and the control module is connected with the control signal transmitting module and the detection signal receiving module. According to the dual-light-source focusing device provided by the invention, the dot matrix light source can provide illumination with relatively concentrated energy and is suitable for long-distance focusing, and the area array light source can provide relatively uniform illumination and is suitable for short-distance focusing, so that the two light sources are combined for use, and the focusing efficiency is improved. The focusing resolution of the focusing device at different distances can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of focusing technology, and in particular to a dual-light source focusing device and a focusing method thereof. Background Art

[0002] Currently, ITOF (Indirect time of flight) can be converted into time through the phase difference between the emitted light and the returned light, and the speed of light can be converted into distance to obtain the depth between the camera and the photographed object.

[0003] Currently, cameras use single point, area array and dot array to obtain distance information to achieve focusing effect. The distance measured by single point and area array is not far, while the distance measured by dot array is far but the resolution is not high. There is not enough depth information at close range, and it is impossible to take into account the focusing solution of both long and short distances. Summary of the invention

[0004] The purpose of the present invention is to provide a dual-light source focusing device and a focusing method thereof, including a dot matrix light source and a planar array light source, wherein focusing is achieved by the planar array light source at a short distance and by the dot matrix light source at a long distance, so as to solve the technical problems existing in traditional cameras.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] One aspect of an embodiment of the present invention provides a dual-light source focusing device, which includes: a signal transmitting module, which includes a point matrix light source and a planar matrix light source, and the signal transmitting module transmits a light source signal through the point matrix light source or the planar matrix light source; a signal receiving module, which includes a signal receiver, and the signal receiver is used to receive the light source signal reflected after being emitted by the point matrix light source or the planar matrix light source; and a control module, which is connected to control the signal transmitting module and connected to detect the signal receiving module.

[0007] In some embodiments, the focusing device also includes a circuit board, the signal transmitting module, the signal receiving module and the control module are all arranged on the circuit board and are electrically connected to the circuit board, the point array light source and the surface array light source are arranged around the signal receiver; the circuit board is respectively connected to a first interface and a second interface.

[0008] In some embodiments, the planar array light source is disposed above the signal receiver, and the point array light source is disposed to the right of the signal receiver.

[0009] In some embodiments, the signal transmitting module includes a bidirectional switch, a dot matrix driving circuit, and a surface array driving circuit. The bidirectional switch is respectively connected to the signal receiving module, the control module, the dot matrix driving circuit, and the surface array driving circuit. The dot matrix driving circuit is connected to the dot matrix light source, and the surface array driving circuit is connected to the surface array light source.

[0010] In some embodiments, the focusing device further includes a light intensity detection module. The light intensity detection module is connected to the control module. The control module obtains the external light intensity according to the light intensity detection module, and adjusts the display brightness according to the light intensity.

[0011] In some embodiments, the dot matrix light source includes a first illumination part and a second illumination part. The second illumination part surrounds the outside of the first illumination part. The first illumination part is provided with a first set number of illumination elements, and the second illumination part is provided with a second set number of illumination elements. The first set number is greater than the second set number.

[0012] In some embodiments, the second illumination part includes a first side part, a second side part, a third side part, and a fourth side part. The first side part, the second side part, the third side part, and the fourth side part are sequentially connected to form a closed area. The second set number of illumination elements are arranged in the closed area. The first side part, the second side part, the third side part, and the fourth side part are all in an arc shape that is concave inward.

[0013] One aspect of the embodiments of the present invention provides a focusing method for a dual-light-source focusing device. The focusing method includes: controlling the dot matrix light source and the surface array light source to respectively emit light source signals; respectively collecting a first reflection signal and a second reflection signal through a signal receiver; calculating a first confidence level of the first reflection signal and a second confidence level of the second reflection signal through a confidence algorithm; screening out the light source with a high confidence level from the dot matrix light source and the surface array light source according to the first confidence level and the second confidence level; calculating the distance from the target object by using the light source with a high confidence level, and performing focusing according to the distance.

[0014] In some embodiments, in screening out the light source with a high confidence level from the dot matrix light source and the surface array light source according to the first confidence level and the second confidence level, the focusing method further includes: when the absolute value of the difference between the first confidence level and the second confidence level is greater than a first preset threshold, it is determined that the confidence level of the dot matrix light source is higher than the confidence level of the surface array light source; when the absolute value of the difference between the first confidence level and the second confidence level is less than or equal to the first preset threshold, it is determined that the confidence level of the dot matrix light source is lower than the confidence level of the surface array light source.

[0015] In some embodiments, the focusing method further includes: obtaining a dot matrix switch signal and a planar array switch signal in real time; and selecting to turn on the dot matrix light source or the planar array light source according to the dot matrix switch signal and the planar array switch signal.

[0016] A dual-light-source focusing device and a focusing method according to an embodiment of the present invention have at least the following beneficial effects: The present application is provided with a dot matrix light source and a planar array light source. For close distances, focusing is achieved through the planar array light source, and for long distances, focusing is achieved through the dot matrix light source, improving the resolution of the camera for close-range and long-range focusing. The dot matrix light source and the planar array light source are arranged around the signal receiver. Such a design can ensure that the center distances between the signal receiver and the two emission light sources are relatively small, and a relatively small field-of-view blind area can be achieved. The second lighting portion surrounds the outside of the first lighting portion, and the first set number of the first lighting portion is greater than the second set number of the second lighting portion. This design of increasing the density in the center solves the problem of sparse long-distance focus points. The planar array light source is arranged above the signal receiver, and the dot matrix light source is arranged to the right of the signal receiver, forming an L-shaped overall layout with the signal receiver as the center position. This L-shaped layout makes the field-of-view blind area of the dual-light-source focusing device smaller, the ranging performance better, and at the same time, it is also convenient to centrally layout the connection lines on the circuit board.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic structural diagram of a dual-light-source focusing device according to an embodiment;

[0020] Figure 2 is a schematic block diagram of the principle of a dual-light-source focusing device according to an embodiment;

[0021] Figure 3 is a schematic diagram of the distribution structure of the lighting elements of the dot matrix light source according to an embodiment.

[0022] The reference numerals are explained as follows: 1, dot matrix light source; 2, planar array light source; 3, signal receiver; 4, circuit board; 5, first lighting portion; 6, second lighting portion; 7, first interface; 8, second interface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] The terms "first", "second", and "third" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] The process steps are only illustrative and not necessarily include all the contents and operations / steps. For example, some operations / steps can be decomposed, while some operations / steps can be combined or partially combined. Nor is it necessary to be executed in the described order, so the actual execution order may be changed according to the actual situation.

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be more complete and comprehensive, and will fully convey the concept of the example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repeated description will be omitted.

[0028] The dual-light-source focusing device of the embodiments of the present application will be briefly described below:

[0029] According to some embodiments, as Figures 1 to 2 shown, the present application provides a dual-light-source focusing device, and the focusing device includes:

[0030] Signal emission module. The signal emission module includes a dot matrix light source 1 and a planar array light source 2. The signal emission module emits a light source signal through the dot matrix light source 1 or the planar array light source 2;

[0031] Signal reception module. The signal reception module includes a signal receiver 3. The signal receiver 3 is used to receive the light source signal reflected after being emitted by the dot matrix light source 1 or the planar array light source 2;

[0032] Control module. The control module is connected to control the signal emission module and is also connected to detect the signal reception module.

[0033] The working principle of the above embodiment is that when the object to be focused is at a relatively long distance, the dot matrix light source 1 is selected. The control module controls the dot matrix light source 1 to emit a light source signal through the signal emission module. After the light source signal reaches the object to be focused and is reflected back, it is received and detected by the signal reception module. The signal reception module analyzes the reflected light and then sends it to the control module. The control module converts the phase difference between the emitted light and the returned light into time, calculates the distance based on the speed of light and time, so as to obtain the distance between the camera and the object to be focused, and finally performs focusing according to the distance.

[0034] When the object to be focused is at a relatively short distance, the planar array light source 2 is selected. The control module controls the planar array light source 2 to emit a light source signal through the signal emission module. After the light source signal reaches the object to be focused and is reflected back, it is received and detected by the signal reception module. The signal reception module analyzes the reflected light and then sends it to the control module. The control module converts the phase difference between the emitted light and the returned light into time, calculates the distance based on the speed of light and time, so as to obtain the distance between the camera and the object to be focused, and finally performs focusing according to the distance.

[0035] The energy of the dot matrix light source 1 is concentrated and the ranging distance is far, and it can support ranging up to 20 meters at most; the ranging distance of the planar array light source 2 is short, but it is relatively uniform, and it can support ranging up to 6 meters at most. And this application combines the dot matrix light source 1 and the planar array light source 2, realizes focusing through the planar array light source 2 at close range, and realizes focusing through the dot matrix light source 1 at long range, improving the resolution of the camera for close-range focusing and long-range focusing.

[0036] The following combines the appendix of this specification Figures 1 to 3 , and further elaborates in detail on the dual-light-source focusing device of this application.

[0037] According to some embodiments, as Figure 1 shown, the focusing device further includes a circuit board 4. The signal emission module, the signal reception module and the control module are all arranged on the circuit board 4 and are all electrically connected to the circuit board 4. The dot matrix light source 1 and the planar array light source 2 are arranged around the signal receiver 3.

[0038] The dot matrix light source 1 and the area array light source 2 are arranged around the signal receiver 3. Such a design can ensure that the center distances between the signal receiver 3 and the centers of the two emission light sources are relatively small, enabling a relatively small field of view blind area. At the same time, a small center distance can save occupied space, reduce the resistance brought by the circuit, reduce heat loss, and reduce power waste.

[0039] In some specific embodiments, as Figure 1 shown, the dot matrix light source 1 is arranged on the right side of the signal receiver 3, and the area array light source 2 is arranged above the signal receiver 3, forming an L-shaped overall layout with the signal receiver 3 as the center position. This L-shaped layout makes the field of view blind area of the dual-light source focusing device smaller, the ranging performance better, and it is also convenient for centralized layout of the connection lines on the circuit board 4. In other embodiments, the dot matrix light source 1 and the area array light source 2 can also be swapped, or the dot matrix light source 1 and the area array light source 2 can be respectively arranged above and below, or left and right of the signal receiver 3. The present application does not make any limitations.

[0040] According to some embodiments, as Figure 2 shown, the signal transmission module includes a bidirectional switch, a dot matrix driving circuit, and an area array driving circuit. The bidirectional switch is respectively connected to the signal receiving module, the control module, the dot matrix driving circuit, and the area array driving circuit. The dot matrix driving circuit is connected to the dot matrix light source 1, and the area array driving circuit is connected to the area array light source 2.

[0041] The working principle of the above embodiments is that when the dot matrix light source 1 is selected for use, the control module controls the dot matrix driving circuit to work through the bidirectional switch, and the dot matrix driving circuit controls the dot matrix light source 1 to emit light source signals. When the area array light source 2 is selected for use, the control module controls the area array driving circuit to work through the bidirectional switch, and the area array driving circuit controls the area array light source 2 to emit light source signals.

[0042] According to some embodiments, as Figure 2 shown, the focusing device further includes a light intensity detection module. The light intensity detection module is connected to the control module. The control module obtains the external light intensity according to the light intensity detection module and adjusts the display brightness according to the light intensity.

[0043] The working principle of the above embodiments is that when focusing with the dot matrix light source 1 or the area array light source 2, the light intensity detection module detects the external light intensity, converts the light intensity into an electrical signal and transmits it to the control module. If the external light intensity exceeds the second preset threshold, it will cause the screen brightness of the camera to be too high, and the control module controls to reduce the screen brightness of the camera; if the external light intensity is lower than the second preset threshold, it will cause the screen brightness of the camera to be too low, and the control module controls to increase the screen brightness of the camera.

[0044] Among them, the second preset threshold can be set according to actual needs.

[0045] According to some embodiments, such as Figure 3 shown, the dot matrix light source 1 includes a first illumination unit 5 and a second illumination unit 6. The second illumination unit 6 surrounds the outside of the first illumination unit 5. The first illumination unit 5 is provided with a first set number of illumination elements, and the second illumination unit 6 is provided with a second set number of illumination elements. The first set number is greater than the second set number.

[0046] The second illumination unit 6 surrounds the outside of the first illumination unit 5. The first set number of the first illumination unit 5 is greater than the second set number of the second illumination unit 6. This design of increasing the density at the center solves the problem of sparse focus points at long distances.

[0047] The first set number and the second set number can be set according to actual needs. In some specific embodiments, the dot matrix is a dot matrix light source 1 with a 60×45 field of view angle and 3960 points. The first set number of the first illumination unit 5 is 3000 points, and the second set number of the second illumination unit 6 is 960 points. The area array is an area array light source 2 with a 65×51 field of view angle.

[0048] Furthermore, as Figure 3 shown, the second illumination unit 6 includes a first side portion, a second side portion, a third side portion, and a fourth side portion. The first side portion, the second side portion, the third side portion, and the fourth side portion are sequentially connected to form a closed area. The second set number of illumination elements is arranged in the closed area.

[0049] Among them, the shapes of the first side portion, the second side portion, the third side portion, and the fourth side portion can be set according to actual needs. In some specific embodiments, the first side portion, the second side portion, the third side portion, and the fourth side portion are all in an arc shape that is concave inward.

[0050] In some embodiments, as Figure 1 shown, the circuit board 4 is respectively connected with a first interface 7 and a second interface 8. Among them, the first interface 7 and the second interface 8 are used for connection when performing signal interaction with the main board or other hardware circuits or devices.

[0051] The following elaborates on the focusing method of the dual-light-source focusing device according to the embodiments of the present application:

[0052] According to some embodiments, the present application provides a focusing method for a dual-light-source focusing device. The focusing method specifically includes:

[0053] Step 101, control the dot matrix light source 1 and the area array light source 2 to respectively emit light source signals.

[0054] In step 101, the control module controls the dot matrix driving circuit to work through a bidirectional switch, and the dot matrix driving circuit controls the dot matrix light source 1 to emit a light source signal; then the control module controls the area array driving circuit to work through the bidirectional switch, and the area array driving circuit controls the area array light source 2 to emit a light source signal. Among them, the order in which the dot matrix light source 1 and the area array light source 2 emit light source signals can be set according to actual needs.

[0055] Step 102, the control module respectively collects the first reflection signal and the second reflection signal through the signal receiver 3.

[0056] In step 102, the control module collects the first reflection signal and the second reflection signal through the signal receiver 3. Among them, it can be set that the first reflection signal is the reflection signal of the dot matrix light source 1, and the second reflection signal is the reflection signal of the area array light source 2, or it can be set that the first reflection signal is the reflection signal of the area array light source 2, and the second reflection signal is the reflection signal of the dot matrix light source 1.

[0057] Step 103, the control module calculates the first confidence level of the first reflection signal and the second confidence level of the second reflection signal through a confidence algorithm.

[0058] Step 104, the control module screens out the light source with a high confidence level from the dot matrix light source 1 and the area array light source 2 according to the first confidence level and the second confidence level.

[0059] Further, in step 104, screening out the light source with a high confidence level from the dot matrix light source 1 and the area array light source 2 according to the first confidence level and the second confidence level, the focusing method specifically further includes:

[0060] Calculate the absolute value of the difference between the first confidence level and the second confidence level;

[0061] When the absolute value of the difference between the first confidence level and the second confidence level is greater than the first preset threshold, it is determined that the confidence level of the dot matrix light source 1 is higher than that of the area array light source 2, and the dot matrix light source 1 is selected for use.

[0062] When the absolute value of the difference between the first confidence level and the second confidence level is less than or equal to the first preset threshold, it is determined that the confidence level of the dot matrix light source 1 is lower than that of the area array light source 2, and the area array light source 2 is selected for use.

[0063] The dot matrix light source 1 is mainly used for long-distance focusing. Although the confidence level of the dot matrix light source 1 for close-range focusing is low, it still has a certain confidence level. The area array light source 2 is mainly used for close-range focusing, and the confidence level for long-distance focusing is extremely low, and its confidence level is lower than that of the dot matrix light source 1 for close-range focusing.

[0064] Therefore, when the object to be focused is at a relatively far distance, the confidence level of the dot matrix light source 1 is extremely high, and the confidence level of the area array light source 2 is extremely low. The absolute value of the difference between the first confidence level and the second confidence level is large and greater than the first preset threshold. When the object to be focused is at a relatively close distance, the confidence level of the dot matrix light source 1 is low, and the confidence level of the area array light source 2 is extremely high. The absolute value of the difference between the first confidence level and the second confidence level is small and less than or equal to the first preset threshold.

[0065] Among them, the first preset threshold can be set according to actual needs.

[0066] Furthermore, if the first confidence level is equal to the second confidence level, then the area array light source 2 is selected for use.

[0067] Step 105: Calculate the distance from the target object using the light source with a high confidence level, and perform focusing based on the distance.

[0068] In some embodiments, after step 105, the focusing method specifically further includes:

[0069] Repeat steps 101 to 105 at intervals of a set duration.

[0070] Since the target object or the focusing device may be displaced over time, when the dot matrix light source 1 or the area array light source 2 is selected for focusing, steps 101 to 105 will be repeated at intervals of a set duration. Among them, the set duration can be set according to actual needs.

[0071] When the dot matrix light source 1 is selected for focusing, if it is calculated in the repeated step in step 104 that the dot matrix light source 1 should be selected for focusing, then there is no need to change the light source, and then enter step 105 to calculate the distance between the camera and the target object, and perform focusing again based on the distance.

[0072] When the dot matrix light source 1 is selected for focusing, if it is calculated in the repeated step in step 104 that the area array light source 2 should be selected for focusing, then the dot matrix light source 1 needs to be replaced with the area array light source 2, and then enter step 105, use the area array light source 2 to calculate the distance between the camera and the target object, and finally perform focusing based on the distance.

[0073] This application does not need to specifically mark whether the reflected signal is the reflected signal of the dot matrix light source 1 or the area array light source 2. It only needs to calculate the absolute value of the difference between the first confidence level of the first reflected signal and the second confidence level of the second reflected signal, and then compare the absolute value of the difference with the first preset threshold to know whether to select the dot matrix light source 1 or the area array light source 2, reducing cumbersome steps and improving calculation efficiency.

[0074] According to some embodiments, in addition to the above autofocus method, the focusing method of this application can also manually select focusing. The manual selection focusing method includes:

[0075] The control module obtains the dot matrix switch signal and the area array switch signal in real time, and the dot matrix switch signal and the area array switch signal are manually selected.

[0076] The control module selects to turn on the dot matrix light source 1 or the area array light source 2 according to the dot matrix switch signal and the area array switch signal. That is, when the dot matrix light source 1 is manually selected, the dot matrix switch signal is sent to the control module. After receiving the dot matrix switch signal, the control module controls the dot matrix drive circuit to work through the bidirectional switch, and the dot matrix drive circuit controls the dot matrix light source 1 to emit a light source signal; when the area array light source 2 is manually selected, the area array switch signal is sent to the control module. After receiving the area array switch signal, the control module controls the area array drive circuit to work through the bidirectional switch, and the area array drive circuit controls the area array light source 2 to emit a light source signal.

[0077] In the description of the above embodiments, the specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0078] Although the present disclosure has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present disclosure can be embodied in many forms without departing from the spirit or essence of the present application, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope defined by the appended claims. Therefore, all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A dual-light source focusing device, characterized in that: The focusing device comprises: A signal transmitting module, wherein the signal transmitting module comprises a point array light source and a planar array light source, and the signal transmitting module transmits a light source signal through the point array light source or the planar array light source; A signal receiving module, the signal receiving module comprising a signal receiver, the signal receiver is used to receive a light source signal reflected after being emitted by the point array light source or the planar array light source; A control module is connected to control the signal transmitting module and connected to detect the signal receiving module.

2. The focusing device according to claim 1, characterized in that: The focusing device further includes a circuit board, the signal transmitting module, the signal receiving module and the control module are all arranged on the circuit board and are all electrically connected to the circuit board, and the point array light source and the planar array light source are arranged around the signal receiver; The circuit board is connected with a first interface and a second interface respectively.

3. The focusing device according to claim 2, characterized in that: The planar array light source is arranged above the signal receiver, and the dot matrix light source is arranged on the right side of the signal receiver.

4. The focusing device according to claim 1, characterized in that: The signal transmitting module includes a bidirectional switch, a dot matrix driving circuit and a planar array driving circuit. The bidirectional switch is respectively connected to the signal receiving module, the control module, the dot matrix driving circuit and the planar array driving circuit. The dot matrix driving circuit is connected to the dot matrix light source, and the planar array driving circuit is connected to the planar array light source.

5. The focusing device according to claim 1, characterized in that: The focusing device further comprises a light intensity detection module, which is connected to the control module. The control module obtains external light intensity according to the light intensity detection module and adjusts the display brightness according to the light intensity.

6. The focusing device according to claim 1, characterized in that: The dot matrix light source includes a first lighting part and a second lighting part, the second lighting part is enclosed on the outside of the first lighting part, the first lighting part is provided with a first set number of lighting elements, and the second lighting part is provided with a second set number of lighting elements, and the first set number is greater than the second set number.

7. The focusing device according to claim 6, characterized in that: The second lighting portion includes a first side portion, a second side portion, a third side portion and a fourth side portion, the first side portion, the second side portion, the third side portion and the fourth side portion are sequentially connected to form a closed area, and the second set number of lighting elements are arranged in the closed area; The first side portion, the second side portion, the third side portion and the fourth side portion are all in an arc shape that is concave inwards.

8. A focusing method for a dual-light source focusing device, characterized in that: The focusing method comprises: Control the dot array light source and the area array light source to emit light source signals respectively; respectively collecting the first reflection signal and the second reflection signal through a signal receiver; Calculating a first confidence level of the first reflected signal and a second confidence level of the second reflected signal by a confidence algorithm; Screening out a light source with a high confidence level from among the point array light sources and the area array light sources according to the first confidence level and the second confidence level; The distance to the target object is calculated using a light source with high confidence, and focusing is performed based on the distance.

9. The focusing method according to claim 8, characterized in that: In selecting a light source with a high confidence level from the point array light source and the area array light source according to the first confidence level and the second confidence level, the focusing method further includes: When the absolute value of the difference between the first confidence level and the second confidence level is greater than a first preset threshold, it is determined that the confidence level of the point array light source is higher than the confidence level of the area array light source; When the absolute value of the difference between the first confidence level and the second confidence level is less than or equal to a first preset threshold, it is determined that the confidence level of the point array light source is lower than the confidence level of the area array light source.

10. The focusing method according to claim 8, characterized in that: The focusing method further comprises: Acquire dot matrix switch signals and area matrix switch signals in real time; The dot matrix light source or the area array light source is selectively turned on according to the dot matrix switch signal and the area array switch signal.

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