AA method of camera module, camera module and electronic equipment

Abstract

The invention discloses an AA method of a camera module, the camera module and electronic equipment, and the method comprises the steps: enabling a transmitter and a receiving sensor to be fixed on a same substrate, enabling a transmitting optical assembly to be pre-located on the substrate corresponding to the transmitter, and enabling a receiving optical assembly to be pre-located on the substrate corresponding to the receiving sensor; and the receiving optical element is fixed on the substrate after being adjusted by the first AA equipment. And the emitter is lightened to enable the receiving sensor and the emitter to work at the same frequency, and the emitting optical element is fixed on the substrate after the second AA equipment is used for adjusting the emitting optical component. Independent AA is firstly carried out on the receiving optical assembly and the receiving sensor, so that the receiving optical assembly and the receiving sensor can realize normal photographing, and then the receiving sensor and the transmitter work at the same frequency, so that AA can be carried out on the transmitting optical assembly and the transmitter through the receiving optical assembly, the AA method of the camera module can be simplified, and the shooting efficiency of the camera module can be improved. And the production process of the camera module is simpler.

Description

Technical Field

[0001] The present application relates to the field of camera technology, and in particular to an AA method of a camera module, a camera module and an electronic device. Background Art

[0002] The camera is an electronic device used to capture images and is an essential component of the camera module. The dual-camera camera module is constructed by placing the transmitter and receiver sensors on the same substrate and then independently performing Active Alignment (AA) on the transmitter, receiver, transmitter sensor, and receiver sensor.

[0003] In the related art, the commonly used AA method is mostly to perform independent AA on the lens of the transmitting end and the lens of the receiving end respectively. This AA method is not only complicated, but also has low AA accuracy and AA efficiency. Summary of the invention

[0004] The present invention discloses an AA method for a camera module, a camera module and an electronic device, which can simplify the AA method for the camera module.

[0005] In order to achieve the above-mentioned object, the first aspect of the present utility model discloses an AA method of a camera module, comprising:

[0006] Fix the transmitter and the receiving sensor on the same substrate;

[0007] Pre-positioning a transmitting optical component and a receiving optical component on a substrate, and making the transmitting optical component be arranged correspondingly to the transmitter, and the receiving optical component be arranged correspondingly to the receiving sensor;

[0008] adjusting the receiving optical assembly using a first AA device so that the receiving optical assembly is aligned with the receiving sensor;

[0009] Adjusting the aligned receiving optical component from pre-positioning to fixing it on the substrate;

[0010] The transmitter is turned on to make the receiving sensor work at the same frequency as the transmitter, and the transmitting optical component is adjusted by a second AA device, and the adjusted transmitting optical component is adjusted from a pre-positioning to being fixed on the substrate.

[0011] By fixing the transmitter and the receiving sensor on the same substrate, and pre-positioning the transmitting optical component and the receiving optical component on the substrate accordingly, the structure of the camera module can be made more compact, while reducing the volume of the camera module, which is conducive to the miniaturization design of the camera module.

[0012] In addition, the transmitting optical component is set corresponding to the transmitter, and the receiving optical component is set corresponding to the receiving sensor, so that it is convenient to perform AA on the transmitting optical component and the receiving optical component respectively relative to the transmitter and the receiving sensor in the subsequent steps.

[0013] By adopting the first AA device, the receiving optical component and the receiving sensor can be aligned, so that the receiving optical component and the receiving sensor can realize the shooting function, and the captured pictures are clear and not skewed, etc., which facilitates the subsequent AA adjustment of the transmitter and the transmitting optical component through the receiving optical component and the receiving sensor.

[0014] By lighting up the transmitter, the receiving sensor and the transmitter work at the same frequency. At this time, the second AA device is used to perform AA on the transmitting optical component. This can make the position of the transmitting optical component correct relative to the receiving optical component. This can make the camera module more accurate, thereby further improving the reliability of the camera module.

[0015] In addition, by lighting up the transmitter, the receiving sensor and the transmitter work at the same frequency. At this time, the second AA device is used to perform AA on the transmitting optical component. In this way, the position of the transmitting optical component relative to the transmitter and the receiving optical component can be adjusted by the second AA device, thereby improving the relative depth accuracy and absolute depth accuracy of the transmitting optical component.

[0016] It can be seen that the AA method of the camera module of the present application first performs AA on the receiving sensor and the receiving optical component, and then performs AA on the transmitting optical component and the transmitter based on the already determined positions of the receiving optical component and the receiving sensor. This method does not need to repeatedly adjust the positions of the transmitting optical component and the receiving optical component, thereby simplifying the AA method of the camera module and making the production process of the camera module simpler.

[0017] As an optional implementation, the first AA device includes a first test scale, the first test scale is provided with a first positioning mark and a second positioning mark of different shapes, and the first positioning mark and the second positioning mark are arranged at intervals.

[0018] The first test scale is provided with a first positioning mark and a second positioning mark of different shapes, and the first positioning mark and the second positioning mark are arranged at intervals. In this way, AA is performed on the receiving optical component and the receiving sensor on the substrate on the first test scale. When the receiving optical component performs image taking operation on the first test scale, the receiving optical component can directly perform rotational correction on the receiving optical component by judging and distinguishing the position of the second positioning mark relative to the first positioning mark, and the position of the second positioning mark at the first test scale, thereby improving the accuracy and convenience of AA of the receiving optical component and the receiving sensor.

[0019] As an optional embodiment, there are multiple first positioning marks and multiple second positioning marks, one first positioning mark is set at the center of the first test scale, and the remaining multiple first positioning marks are arranged around the first positioning mark located in the center, and multiple second positioning marks are distributed around the first positioning mark located in the center.

[0020] A first positioning mark is set at the center of the first test scale, and the remaining multiple first positioning marks are arranged around the first positioning mark located in the center, and multiple second positioning marks are distributed around the first positioning mark located in the center, so that the light and dark contrast scores can be read through the center and the surrounding multiple first positioning marks to determine whether there is an angle tilt until the scores on all sides are adjusted.

[0021] As an optional implementation, the remaining plurality of first positioning marks are arranged in a rectangle, and there is at least one second positioning mark between two adjacent first positioning marks along a first direction, wherein the first direction is the width direction of the rectangle; and / or,

[0022] The first positioning mark is a rectangular mark, and the second positioning mark is an L-shaped mark; and / or,

[0023] The number of the first positioning marks is greater than the number of the second positioning marks.

[0024] In this way, when the receiving optical element takes a picture of the first test scale and performs calculations, it can directly determine the position of each second positioning mark relative to the two adjacent first positioning marks along the first direction. If the second positioning mark is not between the two adjacent first positioning marks along the first direction, it can directly and quickly identify that there is a rotational deviation in the position of the receiving optical component relative to the receiving sensor, thereby facilitating rotation correction.

[0025] By using a rectangular first positioning mark and an L-shaped second positioning mark, it is easy to distinguish the first positioning mark and the second positioning mark, thereby preventing the first positioning mark and the second positioning mark from being confused during the AA process, thereby reducing the difficulty of AA to a certain extent.

[0026] By having a greater number of first positioning marks than the number of second positioning marks, more reference points can be provided through the first positioning marks, which helps to reduce errors, thereby improving the accuracy of AA performed by the receiving optical component and the receiving sensor. In addition, when there are a large number of first positioning marks, the operator can make a distinction by quickly identifying multiple first positioning marks, thereby simplifying the operation process, and further improving the convenience of AA performed by the receiving optical component and the receiving sensor.

[0027] As an optional implementation, the first AA device further includes a near infrared light source;

[0028] The step of using a first AA device to adjust the receiving optical component so that the receiving optical component is aligned with the receiving sensor comprises:

[0029] The first AA device uses the first test scale and the near infrared light source;

[0030] The near infrared light source is illuminated at a side of the first test scale away from the receiving optical component so that the receiving sensor receives an image, and the receiving optical component is aligned with the receiving sensor.

[0031] The receiving sensor receives the pattern reflected by the first test scale and performs calculations, and adjusts the position of the receiving optical component relative to the receiving sensor according to the calculation results, so that the AA of the receiving optical component can be achieved. In addition, the near-infrared light emitted by the near-infrared light source has a long wavelength and good penetration, so that the pattern captured by the receiving sensor can be obvious, thereby further improving the accuracy of the AA of the receiving optical component and the receiving sensor on the substrate.

[0032] As an optional implementation, the first AA device includes a second test scale;

[0033] In the step of lighting the transmitter, making the receiving sensor work at the same frequency as the transmitter, using a second AA device to adjust the transmitting optical component, and adjusting the adjusted transmitting optical component from pre-positioning to being fixed on the substrate,

[0034] The second AA device uses the first AA device with the second test scale, and the first AA device switches the first test scale to the second test scale, or,

[0035] The second AA device includes a second test ruler, and the second test ruler adopts a diffuse reflection test standard.

[0036] By switching the first test scale of the first AA device to the second test scale, the positions of the emitting optical component and the receiving optical component on the substrate will not be changed, so that the first AA device can automatically complete the switching, so that the second AA device can be used to quickly and directly perform AA on the emitting optical component, so that the position of the emitting optical component is AA relative to the receiving optical component, thereby reducing the difficulty of AA of the emitting optical component and simplifying the process of the overall AA method of the camera module.

[0037] By directly including the second test ruler in the second AA device, it is possible to avoid the situation where, when the first AA device is used to switch from the first test ruler to the second test ruler, problems occur in the switching process, resulting in the second test ruler being unable to be used normally. In addition, the second test ruler uses a diffuse reflection test mark, which allows the second test ruler to reflect the light beam in all directions, so that there is no need to set the receiving optical component in a specific position, and the light beam reflected by the second test ruler can be clearly photographed, so that the receiving optical component with good AA can be directly used to shoot the second test ruler, and the transmitting optical component can be aligned with the transmitter, thereby simplifying the AA method of the entire camera module and improving the accuracy of AA of the entire camera module. In addition, diffuse reflection makes it unnecessary for the receiving sensor to be set in a specific position, and the receiving sensor and the transmitter can be set more compactly, which can further reduce the volume of the camera module.

[0038] As an optional implementation, the pre-positioning of the transmitting optical component and the receiving optical component on the substrate includes:

[0039] Providing a first bracket, fixing the first bracket on the substrate, and providing a first light through hole and a second light through hole on the first bracket, wherein the first light through hole is arranged corresponding to the emitter, and the second light through hole is arranged corresponding to the second emitter;

[0040] Provide a second bracket, wherein the second bracket has an accommodating space, and the second bracket has a third light-through hole connected to the accommodating space, install the emitting optical component in the accommodating space, and pre-bond the second bracket to the first bracket by glue, so that the third light-through hole corresponds to and is connected to the first light-through hole, thereby making the emitting optical component and the emitter correspondingly arranged;

[0041] The receiving optical component is pre-bonded to the first bracket by glue, and the receiving optical component is arranged corresponding to the receiving sensor.

[0042] By installing the transmitting optical component in the accommodating space of the second bracket, and then pre-bonding the second bracket to the first bracket with glue, the first bracket is fixed on the substrate. Therefore, when the transmitting optical component performs AA relative to the transmitter, only the part in the second bracket needs to be adjusted, so that the adjustment volume of the transmitting optical component is smaller. The smaller lens is easier to control the dimensional accuracy during the manufacturing process, thereby reducing the error of the component itself. During the assembly process, the relative position between the components is also easier to control accurately, so that the adjustment accuracy can be higher, thereby improving the accuracy of the transmitting optical component performing AA relative to the transmitter, thereby improving the overall AA accuracy of the camera module.

[0043] As an optional implementation, the adopting a second AA device to adjust the emission optical component, and adjusting the adjusted emission optical component from being pre-positioned to being fixed on the substrate, comprises:

[0044] adjusting the emission optical assembly using a second AA device;

[0045] Using the receiving optical component to photograph the pattern reflected by the second test scale, and transmitting the pattern to the receiving sensor;

[0046] It is determined whether the parameters of the pattern align the emission optical component with the emission sensor. If not, the position of the emission optical component is adjusted until the parameters of the pattern align the emission optical component with the emission sensor.

[0047] By judging the pattern reflected by the second test scale photographed by the receiving optical component, this pattern contains the deviation information of the transmitting optical component relative to the ideal position. If the position of the transmitting optical component is offset, the pattern may be distorted or deviate from the normal position. By analyzing and judging this reflected pattern, the deviation of the transmitting optical component in each direction can be accurately determined, so that the position of the transmitting optical component can be adjusted in time.

[0048] In a second aspect, the present invention further discloses a camera module, comprising: a substrate;

[0049] A transmitter, wherein the transmitter is disposed on the substrate;

[0050] A receiving sensor, wherein the receiving sensor is disposed on the substrate and is spaced apart from the transmitter;

[0051] an emission optical component, wherein the emission optical component is disposed on the substrate and is disposed corresponding to the emitter; and

[0052] A receiving optical component, the receiving optical component is arranged on the substrate, and the receiving optical component is arranged corresponding to the receiving sensor, wherein:

[0053] The camera module adopts the AA method of the camera module described in the first aspect.

[0054] In a third aspect, the present invention further discloses an electronic device, comprising the camera module as described in the second aspect.

[0055] Compared with the prior art, the beneficial effects of this application are:

[0056] The present invention provides an AA method, camera module and electronic device for a camera module, wherein a transmitter and a receiving sensor are fixed on the same substrate, a transmitting optical component is pre-positioned on the substrate corresponding to the transmitter, a receiving optical component is pre-positioned on the substrate corresponding to the receiving sensor, and the receiving optical component is fixed on the substrate after adjusting the receiving optical component with a first AA device. The transmitter is turned on to make the receiving sensor work at the same frequency as the transmitter, and the transmitting optical component is fixed on the substrate after adjusting the transmitting optical component with a second AA device. By first performing independent AA on the receiving optical component and the receiving sensor, the receiving optical component and the receiving sensor can achieve normal photography, and then the receiving sensor and the transmitter work at the same frequency, so that the transmitting optical component and the transmitter can be AA through the receiving optical component, thereby simplifying the AA method of the camera module, and making the production process of the camera module simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0058] Figure 1 It is a flowchart of the AA method of the camera module disclosed in the embodiment of the present application;

[0059] Figure 2 It is a structural schematic diagram of the camera module disclosed in the embodiment of the present application using a first test ruler for alignment;

[0060] Figure 3 It is a structural schematic diagram of the camera module disclosed in the embodiment of the present application using a second test ruler for alignment;

[0061] Figure 4 is a structural schematic diagram of a camera module disclosed in an embodiment of the present application;

[0062] Figure 5 It is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present application.

[0063] Description of reference numerals:

[0064] 100-camera module; 1-substrate; 11-first bracket; 111-first light hole; 112-second light hole; 12-second bracket; 121-accommodating space; 122-third light hole; 2-transmitter; 3-receiving sensor; 4-transmitting optical component; 41-glue; 5-receiving optical component; 51-fourth light hole; 6-first test scale; 61-first positioning mark; 62-second positioning mark; 7-second test scale; 200-electronic device; X-first direction. DETAILED DESCRIPTION

[0065] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] In this application, the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements, or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0067] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0068] In addition, the terms "disposed" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0070] The camera packaging process involves multiple assembly of components such as image sensors, lens holders, motors, lenses, circuit boards, etc. The packaging equipment in related technologies, such as CSP (Chip Scale Package) packaging and COB (Chips on Board) packaging, all perform mobile assembly of components according to the parameters adjusted by the equipment. Therefore, the stacking tolerance of components is getting larger and larger. The final effect on the camera is that the clearest position of the picture may deviate from the center of the picture, and the clarity of the four corners is uneven.

[0071] When assembling each component, the AA process equipment will detect the semi-finished product being assembled, and actively align it according to the actual situation of the semi-finished product, and then assemble the next component in place. This active alignment technology can effectively reduce the assembly tolerance of the entire module and effectively improve the consistency of camera products.

[0072] In the related art, the commonly used AA method is to first perform independent AA on the lens of the transmitting end, then perform independent AA on the lens of the receiving end, and then the lens of the transmitting end and the lens of the receiving end work at the same frequency, and use the lens of the transmitting end to perform AA on the lens of the receiving end. However, this AA operation method is not only complicated, but also requires multiple debugging of the lens of the receiving end, which affects the debugging efficiency.

[0073] In view of this, the embodiments of the present application disclose an AA method for a camera module, a camera module, and an electronic device, wherein the AA method for the camera module is to first fix the transmitter and the receiving sensor on the same substrate, and the transmitting optical component is pre-positioned on the substrate corresponding to the transmitter, and the receiving optical component is pre-positioned on the substrate corresponding to the receiving sensor. First, the first AA device is used to adjust the receiving optical element, and then the receiving optical element is fixed on the substrate, and then the transmitter is lit so that the receiving sensor and the transmitter work at the same frequency, and the second AA device is used to adjust the transmitting optical component, and then the transmitting optical element is fixed on the substrate. By first performing independent AA on the receiving optical component and the receiving sensor, the receiving optical component and the receiving sensor can realize the normal photo-taking function, and then the receiving sensor and the transmitter work at the same frequency, so that the transmitting optical component and the transmitter can be AA through the photo-taking function of the receiving end, and then the AA method of the camera module can be simplified, making the production process of the camera module simpler.

[0074] The technical solution of the present application will be further described below in conjunction with embodiments and drawings.

[0075] See also Figures 1 to 3 , Figure 1 is a flowchart of the AA method of the camera module disclosed in the embodiment of the present application, Figure 2 is a structural schematic diagram of the camera module disclosed in the embodiment of the present application using a first test ruler for alignment, Figure 3 1 is a schematic diagram of the structure of the camera module disclosed in the embodiment of the present application using the second test ruler for alignment. The AA method of the camera module 100 of the present application includes:

[0076] S1. Fix the transmitter 2 and the receiving sensor 3 on the same substrate 1.

[0077] By fixing the transmitter 2 and the receiving sensor 3 on the same substrate 1, the structure of the camera module 100 can be made more compact, while the volume of the camera module 100 is reduced, which is conducive to the miniaturized design of the camera module 100.

[0078] Among them, the substrate 1 can be a long strip substrate, and the emitter 2 and the receiving sensor 3 can be arranged in sequence along the length direction of the substrate 1, so that there is a certain distance between the emitter 2 and the receiving sensor 3 in the length direction of the substrate 1, so that there will be no light crosstalk between the light emitted by the emitter 2 and the light received by the receiving sensor 3.

[0079] It is understandable that in the above step S1, a RFPC board (rigid-flex board) or a HTCC (high temperature co-fired ceramic) ceramic heating board may be used as the substrate 1, and this embodiment does not specifically limit this.

[0080] S2, pre-positioning the transmitting optical component 4 and the receiving optical component 5 on the substrate 1, and making the transmitting optical component 4 corresponding to the transmitter 2, and the receiving optical component 5 corresponding to the receiving sensor 3.

[0081] By also pre-positioning the transmitting optical component 4 and the receiving optical component 5 on the substrate 1 accordingly, the structure of the camera module 100 can be made more compact, while reducing the volume of the camera module 100, thereby facilitating the miniaturized design of the camera module 100.

[0082] In addition, the transmitting optical component 4 is set corresponding to the transmitter 2, and the receiving optical component 5 is set corresponding to the receiving sensor 3, so that it is convenient to perform AA on the transmitting optical component 4 and the receiving optical component 5 relative to the transmitter 2 and the receiving sensor 3 respectively in the subsequent steps.

[0083] It should be noted that in step S2 , the transmitting optical component 4 and the receiving optical component 5 are pre-positioned on the substrate 1 , but not fixedly mounted on the substrate 1 , which facilitates subsequent position adjustment of the transmitting optical component 4 and the receiving optical component 5 .

[0084] Optionally, see Figure 4 , Figure 4Schematic diagram of the structure of the camera module disclosed in the embodiment of the present application. In the above step S2, pre-positioning the transmitting optical component 4 and the receiving optical component 5 on the substrate 1 includes the following steps:

[0085] S21: Provide a first bracket 11, fix the first bracket 11 on the substrate 1, and provide a first light through hole 111 and a second light through hole 112 on the first bracket 11, wherein the first light through hole 111 is provided corresponding to the transmitter 2, and the second light through hole 112 is provided corresponding to the receiving sensor 3.

[0086] S22: Provide a second bracket 12, which has a accommodating space 121, and the second bracket 12 has a third light hole 122 connected to the accommodating space 121, install the emitting optical component 4 in the accommodating space 121, and pre-bond the second bracket 12 to the first bracket 11 by glue 41, so that the third light hole 122 corresponds to and is connected with the first light hole 111, thereby making the emitting optical component 4 and the emitter 2 correspondingly arranged.

[0087] S23: The receiving optical component 5 has a fourth light through hole 51 , and the receiving optical component 5 is pre-bonded to the first bracket 11 by glue 41 so that the fourth light through hole 51 corresponds to and is connected with the second light through hole 112 , thereby making the receiving optical component 5 correspond to the receiving sensor 3 .

[0088] By installing the transmitting optical component 4 in the accommodating space 121 of the second bracket 12, and then pre-bonding the second bracket 12 to the first bracket 11 by glue 41, the first bracket 11 is fixed on the substrate 1. Compared with directly fixing the transmitting optical component 4 in the first bracket 11 connected to the substrate 1, when the transmitting optical component 4 performs AA relative to the transmitter 2, only the part in the second bracket 12 needs to be adjusted, so that the adjustment volume of the transmitting optical component 4 is smaller. The smaller lens is easier to control the dimensional accuracy during the manufacturing process, thereby reducing the error of the component itself. During the assembly process, the relative position between the components is also easier to accurately control, so that the adjustment accuracy can be higher, thereby improving the accuracy of the transmitting optical component 4 performing AA relative to the transmitter 2, thereby improving the overall AA accuracy of the camera module 100.

[0089] It can be understood that the second bracket 12 is pre-bonded to the first bracket 11 by glue 41, and the receiving optical component 5 is pre-bonded to the first bracket 11 by glue 41. There is no particular order in the two steps of pre-bonding the second bracket 12 first or bonding the receiving optical component 5 first. That is, the above-mentioned step S22 can be performed after step S21, or the above-mentioned step S22 can also be performed before step S21, or the above-mentioned step S22 can also be performed simultaneously with step S21. This embodiment does not make any specific limitation on this.

[0090] S3 . Use the first AA device to adjust the receiving optical component 5 so that the receiving optical component 5 is aligned with the receiving sensor 3 .

[0091] By adopting the first AA device, the receiving optical component 5 and the receiving sensor 3 can be aligned, so that the receiving optical component 5 and the receiving sensor 3 can realize the shooting function, and the captured picture is clear and not skewed, etc., which facilitates the subsequent AA adjustment of the transmitter 2 and the transmitting optical component 4 through the receiving optical component 5 and the receiving sensor 3.

[0092] For some examples, see Figure 2 The first AA device includes a first test scale 6, and the first test scale 6 is provided with a first positioning mark 61 and a second positioning mark 62 of different shapes, and the first positioning mark 61 and the second positioning mark 62 are arranged at intervals. Since the first test scale 6 is provided with the first positioning mark 61 and the second positioning mark 62 of different shapes, and the first positioning mark 61 and the second positioning mark 62 are arranged at intervals, the first test scale 6 performs AA on the receiving optical component 5 and the receiving sensor 3 on the substrate 1. When the receiving optical component 5 performs a picture-taking operation on the first test scale 6, the receiving optical component 5 can directly perform rotation correction on the receiving optical component 5 by judging and distinguishing the position of the second positioning mark 62 relative to the first positioning mark 61, and the position of the second positioning mark 62 at the first test scale 6, thereby being able to improve the accuracy and convenience of AA of the receiving optical component 5 and the receiving sensor 3.

[0093] It is understandable that the first positioning mark 61 and the second positioning mark 62 have different shapes. For example, the shapes of the first positioning mark 61 and the second positioning mark 62 can extend in different directions. This can prevent confusion when the first positioning mark 61 and the second positioning mark 62 are rotated and corrected due to the same shape. This can further facilitate the identification of the rotation correction of the optical element.

[0094] It is understandable that the patterns of the first positioning mark 61 and the second positioning mark 62 need to be different, so there can be multiple examples of the patterns of the first positioning mark 61 and the second positioning mark 62. For example, the first positioning mark 61 is a rectangular mark and the second positioning mark 62 is an L-shaped mark. By making the first positioning mark 61 a rectangular mark and the second positioning mark 62 an L-shaped mark, it is easy to distinguish the first positioning mark 61 and the second positioning mark 62, and prevent the first positioning mark 61 and the second positioning mark 62 from being confused during the AA process, thereby reducing the difficulty of AA to a certain extent. Of course, as other examples, the first positioning mark 61 can also be a triangle and the second positioning mark 62 can be a rectangle.

[0095] Optionally, see Figure 2 , there are multiple first positioning marks 61 and multiple second positioning marks 62. A first positioning mark 61 is set at the center of the first test scale 6, and the remaining multiple first positioning marks 61 are arranged around the first positioning mark 61 at the center, and multiple second positioning marks 62 are distributed around the first positioning mark 61 at the center. A first positioning mark 61 is set at the center of the first test scale 6, and the remaining multiple first positioning marks 61 are arranged around the first positioning mark 61 at the center, and multiple second positioning marks 62 are distributed around the first positioning mark 61 at the center. In this way, the light and dark contrast scores can be read through the multiple first positioning marks 61 at the center and around to determine whether there is an angle tilt, until the scores on all sides are adjusted to have an angle tilt.

[0096] It is understandable that there are many examples of the arrangement of the remaining multiple first positioning marks 61, such as a circular arrangement or a rectangular arrangement. Taking the rectangular arrangement of the remaining multiple first positioning marks 61 as an example, there is at least one second positioning mark 62 between two adjacent first positioning marks 61 along the first direction X, wherein the first direction X is the wideband direction of the rectangle. In this way, when the receiving optical element is taking a picture of the first test scale 6, the position of each second positioning mark 62 relative to the two adjacent first positioning marks 61 along the first direction X can be directly determined. If the second positioning mark 62 is not between the two adjacent first positioning marks 61 along the first direction X, it can be directly and quickly identified that there is a rotational deviation in the position of the receiving optical component 5 relative to the receiving sensor 3, thereby facilitating rotation correction.

[0097] It is understandable that the first test scale 6 may be black, and the first positioning mark 61 and the second positioning mark 62 may be white, which is not specifically limited in this embodiment.

[0098] It is understandable that the number of the first positioning marks 61 is greater than the number of the second positioning marks 62, so that more reference points can be provided by the first positioning marks 61, which helps to reduce errors, thereby improving the accuracy of AA performed by the receiving optical component 5 and the receiving sensor 3. In addition, when the number of the first positioning marks 61 is large, the operator can make a judgment by quickly identifying multiple first positioning marks 61, thereby simplifying the operation process, and further improving the convenience of AA performed by the receiving optical component 5 and the receiving sensor 3.

[0099] For some examples, see Figure 2, the first AA device further includes a near-infrared light source (not shown in the figure). In the above step S3, the first AA device uses the first test scale 6 and the near-infrared light source, and lights the near-infrared light source on the side of the first test scale 6 away from the receiving optical component 5, so that the receiving sensor 3 receives the image, so that the receiving optical component 5 is aligned with the receiving sensor 3. Specifically, the above step S3 may further include the following steps:

[0100] S31, lighting up the near-infrared light source alone, and making the light beam emitted by the near-infrared light source irradiate the first test scale 6;

[0101] S32 , receiving the pattern reflected by the first test scale 6 through the receiving sensor 3 , and performing calculations, and adjusting the position of the receiving optical component 5 relative to the receiving sensor 3 according to the calculation results, thereby achieving AA of the receiving optical component 5 .

[0102] The OC / Z (optical center) of the receiving optical component 5 may be calibrated first, and then the optical axis of the receiving optical component 5 may be calibrated, so that the alignment accuracy between the receiving optical component 5 and the receiving sensor 3 may be more comprehensively improved.

[0103] It is understandable that the near-infrared light emitted by the near-infrared light source has a longer wavelength and better penetration, which can make the pattern captured by the receiving sensor 3 obvious, thereby further improving the accuracy of the receiving optical component 5 and the receiving sensor 3AA on the substrate 1.

[0104] S4, adjusting the aligned receiving optical component 5 from the pre-positioning to be fixed on the substrate 1.

[0105] In this way, the positions of the optical centers and optical axes of the receiving optical component 5 and the receiving sensor 3 can be fixed, and the position accuracy of the receiving optical component 5 can be further improved.

[0106] It can be understood that, in step S4, the aligned receiving optical component 5 is fixed on the substrate 1, so that the positions of the optical center and the optical axis of the receiving optical component 5 and the receiving sensor 3 can be fixed, and the position accuracy of the receiving optical component 5 can be further improved. In addition, the aligned receiving optical component 5 is fixed on the substrate 1, which can also avoid the influence of the subsequent use of the receiving optical component 5 to perform AA on the transmitting optical component 4.

[0107] S5, light up the transmitter 2, so that the receiving sensor 3 and the transmitter 2 work at the same frequency, use the second AA device to adjust the transmitting optical component 4, and adjust the adjusted transmitting optical component 4 from the pre-positioning to fixed on the substrate 1. By lighting up the transmitter 2, the receiving sensor 3 and the transmitter 2 work at the same frequency. At this time, the second AA device is used to perform AA on the transmitting optical component 4, so that the position of the transmitting optical component 4 relative to the receiving optical component 5 can be correct, so that the accuracy of the camera module 100 can be higher, thereby further improving the reliability of the camera module 100.

[0108] In addition, by lighting up the transmitter 2, the receiving sensor 3 and the transmitter 2 work at the same frequency. At this time, the second AA device is used to perform AA on the transmitting optical component 4. In this way, the position of the transmitting optical component 4 relative to the transmitter 2 and the receiving optical component 5 can be adjusted by the second AA device, thereby improving the relative depth accuracy and absolute depth accuracy of the transmitting optical component 4.

[0109] Therefore, by using the first AA device to first adjust the position of the receiving optical component 5 relative to the receiving sensor 3, and then lighting up the transmitter 2 so that the receiving sensor 3 and the transmitter 2 work at the same frequency, and using the second AA device to adjust the position of the transmitting optical component 4 relative to the transmitter 2 and the receiving optical element, compared with independently performing AA on the transmitting optical component 4 and the receiving optical component 5 respectively, and then making the receiving sensor and the transmitter 2 work at the same frequency, the method of adjusting the receiving optical component 5 relative to the transmitting optical component 4 can effectively simplify the AA method of the camera module 100, thereby reducing the complexity of the production process of the camera module 100.

[0110] Understandably, see Figure 3 , there can be multiple examples of the second test ruler 7 used by the second AA device. In one example, the first AA device also includes a second test ruler 7. In step S5, the second AA device uses a first AA device with a second test ruler 7, and the first device switches the first test ruler 6 to the second test ruler 7, that is, when the first AA device is used to adjust the position of the receiving optical component 5 relative to the receiving sensor 3, the first test ruler 6 in the first AA device can be directly switched to the second test ruler 7, so that the first AA device can be switched to the second AA device. It should be noted that when the first test ruler 6 of the first AA device is switched to the second test ruler 7, the positions of the emitting optical component 4 and the receiving optical component 5 on the substrate 1 do not change, and the first AA device can automatically complete the switching, so that step S5 can be performed quickly and directly, so that the emitting optical component 4 is AA relative to the position of the receiving optical component 5, thereby reducing the difficulty of AA of the emitting optical component 4, and then simplifying the process of the overall AA method of the camera module 100.

[0111] In another example, the second AA device includes a second test ruler 7, and the second test ruler 7 adopts a diffuse reflection test mark. By directly including the second test ruler 7 in the second AA device, the AA test can be quickly performed. In addition, the second test ruler 7 adopts a diffuse reflection test mark, so that the second test ruler 7 can reflect the light beam to all directions, so that there is no need to set the receiving optical component at a specific position, and the light beam reflected by the second test ruler 7 can be clearly photographed, so that the receiving optical component 5 with good AA can be directly used to shoot the second test ruler 7, and the transmitting optical component 4 can be aligned with the transmitter 2, so that the AA method of the entire camera module 100 can be simplified, and the accuracy of AA of the entire camera module 100 can be improved. In addition, through diffuse reflection, the receiving sensor 3 does not need to be set at a specific position, and the receiving sensor 3 and the transmitter 2 can be set more compactly, which can further reduce the volume of the camera module 100.

[0112] It is understandable that the captured pattern can be first subjected to OC / Rotation (optical center / rotation) correction and then subjected to optical axis correction, which can help match the accuracy of the receiving optical component 5 and the transmitting optical component 4, and can improve the relative depth accuracy and the absolute depth accuracy.

[0113] In addition, the receiving sensor 3 can perform AA according to the contrast (color contrast, light and dark contrast) in the captured pattern, the spot size, the rotation angle, the relative offset position and the clarity.

[0114] It should be noted that since the driving frequency of the transmitter 2 is relatively high, the light emission time is short, only 800ps1.2ns, and it has a certain waveform distribution. If the receiving sensor 3 has a different frequency from the transmitter 2, the receiving sensor 3 will not be able to capture the clearest emission point cloud. Therefore, the receiving sensor 3 needs to shoot at the same frequency as the transmitter 2. This can further improve the reliability of AA between the transmitter 2 and the transmitting optical component 4.

[0115] In addition, if Figure 3As shown, in steps S3 and S4, the receiving sensor 3 photographs the first test scale 6, and after the AA of the receiving optical component 5 relative to the receiving sensor 3 is achieved, step S5 can be performed, by lighting the transmitter 2, so that the light source emitted by the transmitter 2 is irradiated onto the second test scale 7, so that the receiving sensor 3 photographs the image reflected by the second test scale 7 in a manner having the same frequency as the transmitter 2. If the MTF (Modulation Transfer Function) effect of the receiving sensor 3 is not ideal, that is, the pattern photographed by the receiving sensor 3 is not at the ideal position of the FOV (Field of View) of the receiving sensor 3, then it is necessary to re-fine-tune the MTF of the position of the transmitting optical component 4 relative to the receiving sensor 3 until the MTF, aberration, and rotation meet the specifications, that is, the pattern photographed by the receiving sensor 3 is at the ideal position of the FOV of the receiving sensor 3.

[0116] In step S5, after the position of the emitting optical component 4 relative to the emitter 2 is adjusted to the MTF specification, after the emitter 2 is lit, the emitting optical component 4 can only rotate and adjust the optical center without adjusting the optical axis, so as to avoid affecting the original MTF and causing low UPH (Units Per Hour) and relatively complicated AA process. It should be noted that the above operations can be implemented through software algorithms. In addition, the AA method of this camera module 100 can be compatible with the dual-camera function.

[0117] It can be understood that, in step S5, the second AA device is used to adjust the emission optical component 4, and the adjusted emission optical component 4 is adjusted from the pre-positioning to be fixed on the substrate 1, including the following steps:

[0118] S51, use the second AA device to adjust the emission optical component 4.

[0119] S52 , using the receiving optical component 5 to photograph the pattern reflected by the second test scale 7 , and transmitting it to the receiving sensor 3 .

[0120] S53, judging whether the parameters of the pattern are such that the emission optical component 4 is aligned with the emission sensor. If so, the adjusted emission optical component 4 is adjusted from the pre-positioning to be fixed on the substrate 1. If not, the position of the emission optical component 4 is adjusted until the parameters of the pattern align the emission optical component 4 with the emission sensor, and then the adjusted emission optical component 4 is adjusted from the pre-positioning to be fixed on the substrate 1.

[0121] By judging the pattern reflected by the second test scale 7 photographed by the receiving optical component 5, this pattern contains the deviation information of the transmitting optical component 4 relative to the ideal position. If the position of the transmitting optical component 4 is offset, the pattern may be distorted or deviate from the normal position. By analyzing and judging this reflected pattern, the deviation of the transmitting optical component 4 in each direction can be accurately determined, so that the position of the transmitting optical component 4 can be adjusted in time, and then the transmitting optical component 4 can be fixed on the substrate 1, which can improve the overall AA accuracy of the camera module 100.

[0122] See also Figure 4 In the second aspect, the present application also discloses a camera module 100, including a substrate 1, a transmitter 2, a receiving sensor 3, a transmitting optical component 4 and a receiving optical component 5. The transmitter 2 and the receiving sensor 3 are both arranged on the substrate 1, and the transmitter 2 and the receiving sensor 3 are arranged at intervals, the transmitting optical component 4 is arranged on the substrate 1, and is arranged corresponding to the transmitter 2, and the receiving optical component 5 is arranged on the substrate 1, and is arranged corresponding to the receiving sensor 3. Among them, the camera module 100 adopts the AA method of the camera module 100 as described in the first aspect above, which can not only simplify the AA method of the camera module 100, thereby making the production process of the camera module 100 simpler, but also improve the assembly accuracy of the camera module 100, thereby improving the performance of the camera module 100.

[0123] It is understandable that the transmitting optical component 4 and the receiving optical component 5 are fixed on the first bracket 11 by glue 41. The glue 41 can be ultraviolet curing glue or silicone adhesive, etc., which is not specifically limited in this embodiment.

[0124] Among them, the AA method of the camera module 100 in the embodiment of the present application can be the same as the AA method of any camera module 100 in the above embodiments, and can bring the same or similar beneficial effects. Please refer to the description in the above embodiments for details, and the embodiments of the present application will not be repeated here.

[0125] See also Figure 5 , Figure 5 It is a schematic diagram of the structure of the electronic device disclosed in the embodiment of the present application. In the third aspect, the present application also discloses an electronic device 200, including the camera module 100 as described in the second aspect above. By applying the above-mentioned camera module 100 to the electronic device 200, when the electronic device 200 uses the camera module 100 to take pictures, the photos output by the electronic device 200 can be made clearer, thereby improving the user experience. Among them, the electronic device 200 can be a mobile phone, a tablet, a camera, etc.

[0126] Among them, the camera module 100 in the embodiment of the present application can have the same structure as any camera module 100 in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description in the above embodiments, and the embodiment of the present application will not be repeated here.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An AA method for a camera module, characterized in that: The method comprises: Fix the transmitter and the receiving sensor on the same substrate; Pre-positioning a transmitting optical component and a receiving optical component on a substrate, and making the transmitting optical component be arranged correspondingly to the transmitter, and the receiving optical component be arranged correspondingly to the receiving sensor; adjusting the receiving optical assembly using a first AA device so that the receiving optical assembly is aligned with the receiving sensor; Adjusting the aligned receiving optical component from pre-positioning to fixing it on the substrate; The transmitter is turned on to make the receiving sensor work at the same frequency as the transmitter, and the transmitting optical component is adjusted by a second AA device, and the adjusted transmitting optical component is adjusted from a pre-positioning to being fixed on the substrate.

2. The AA method of the camera module according to claim 1, characterized in that: The first AA device includes a first test ruler, the first test ruler is provided with a first positioning mark and a second positioning mark of different shapes, and the first positioning mark and the second positioning mark are arranged at intervals.

3. The AA method of the camera module according to claim 2, characterized in that: There are multiple first positioning marks and multiple second positioning marks. One first positioning mark is set at the center of the first test scale, and the remaining multiple first positioning marks are arranged around the first positioning mark located in the center, and multiple second positioning marks are distributed around the first positioning mark located in the center.

4. The AA method of the camera module according to claim 2, characterized in that: The remaining plurality of first positioning marks are arranged in a rectangular shape, with at least one second positioning mark between two adjacent first positioning marks along a first direction, wherein the first direction is the width direction of the rectangle; and / or, The first positioning mark is a rectangular mark, and the second positioning mark is an L-shaped mark; and / or, The number of the first positioning marks is greater than the number of the second positioning marks.

5. The AA method of the camera module according to claim 2, characterized in that: The first AA device also includes a near infrared light source; The step of using a first AA device to adjust the receiving optical component so that the receiving optical component is aligned with the receiving sensor comprises: The first AA device uses the first test scale and the near infrared light source; The near-infrared light source is illuminated at a side of the first test scale away from the receiving optical component so that the receiving sensor receives an image, and the receiving optical component is aligned with the receiving sensor.

6. The AA method of the camera module according to claim 1, characterized in that: The first AA device includes a second test ruler; In the step of lighting the transmitter, making the receiving sensor work at the same frequency as the transmitter, using a second AA device to adjust the transmitting optical component, and adjusting the adjusted transmitting optical component from a pre-position to being fixed on the substrate, The second AA device uses the first AA device with the second test scale, and the first AA device switches the first test scale to the second test scale, or, The second AA device includes a second test ruler, and the second test ruler uses a diffuse reflection test mark.

7. The AA method of the camera module according to any one of claims 1 to 6, characterized in that: The step of pre-positioning the transmitting optical component and the receiving optical component on the substrate comprises: Providing a first bracket, fixing the first bracket on the substrate, and providing a first light through hole and a second light through hole on the first bracket, wherein the first light through hole is arranged corresponding to the transmitter, and the second light through hole is arranged corresponding to the receiving sensor; Provide a second bracket, wherein the second bracket has an accommodating space, and the second bracket has a third light-through hole connected to the accommodating space, install the emitting optical component in the accommodating space, and pre-bond the second bracket to the first bracket by glue, so that the third light-through hole corresponds to and is connected to the first light-through hole, thereby making the emitting optical component and the emitter correspondingly arranged; The receiving optical component is pre-bonded to the first bracket by glue, and the receiving optical component is arranged corresponding to the receiving sensor.

8. The AA method of the camera module according to any one of claims 1 to 6, characterized in that: The step of using the second AA device to adjust the emission optical component and adjust the adjusted emission optical component from being pre-positioned to being fixed on the substrate comprises: adjusting the emission optical assembly using a second AA device; Using the receiving optical component to photograph the pattern reflected by the second test scale, and transmitting the pattern to the receiving sensor; It is determined whether the parameters of the pattern align the emission optical component with the emission sensor. If not, the position of the emission optical component is adjusted until the parameters of the pattern align the emission optical component with the emission sensor.

9. A camera module, characterized in that: include: substrate; A transmitter, wherein the transmitter is disposed on the substrate; A receiving sensor, wherein the receiving sensor is disposed on the substrate and is spaced apart from the transmitter; An emission optical component, wherein the emission optical component is disposed on the substrate and is disposed corresponding to the emitter; as well as A receiving optical component, the receiving optical component is arranged on the substrate, and the receiving optical component is arranged corresponding to the receiving sensor, wherein: The camera module adopts the AA method of the camera module as described in any one of claims 1-8.

10. An electronic device, characterized in that: Comprising the camera module as described in claim 9.

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