CN209823873U - Automatic focusing camera module - Google Patents
Automatic focusing camera module Download PDFInfo
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- CN209823873U CN209823873U CN201920996042.3U CN201920996042U CN209823873U CN 209823873 U CN209823873 U CN 209823873U CN 201920996042 U CN201920996042 U CN 201920996042U CN 209823873 U CN209823873 U CN 209823873U
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Abstract
The utility model discloses an automatic focusing camera module, which comprises a circuit board, an annular shell arranged on the circuit board, a driving motor arranged inside the annular shell and a lens component connected with the driving motor; wherein, the drive motor is provided with a magnet, and the circuit board is provided with a magnetic field sensor; when the driving motor drives the lens assembly to move and the distance between the magnet and the magnetic field sensor changes, the magnetic field sensor can sense the change of the magnetic field of the magnet. The utility model provides an automatic focusing module of making a video recording directly realizes the signal connection between magnetic field sensor and the circuit board, has got rid of the intermediate part between magnetic field sensor and the circuit board, has simplified the inner structure of the module of making a video recording, and then reduces the shared space volume of the module of making a video recording, is favorable to the miniaturized development of the module of making a video recording.
Description
Technical Field
The utility model relates to a module technical field especially relates to an automatic module of making a video recording of focusing.
Background
Auto Focus (Auto Focus) is a method that uses the principle of object light reflection to receive reflected light by a sensor CCD on a camera and drive an electric focusing device to Focus through computer processing, namely Auto Focus. Autofocus is often applied to an image pickup apparatus such as a single lens reflex apparatus that has a high demand for image quality. However, people have higher and higher requirements for the camera shooting function of various electronic devices such as mobile phones, and how to reduce the occupied space of the camera shooting module for automatic focusing is one of the technical problems to be solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an automatic focusing module of making a video recording has simplified the module internals of making a video recording, is favorable to reducing the module of making a video recording and accounts for the space volume.
In order to solve the above technical problem, the present invention provides an auto-focusing camera module, which includes a circuit board, an annular housing disposed on the circuit board, a driving motor disposed inside the annular housing, and a lens assembly connected to the driving motor;
the driving motor is provided with a magnet, and the circuit board is provided with a magnetic field sensor; when the driving motor drives the lens component to move and the distance between the magnet and the magnetic field sensor changes, the magnetic field sensor can sense the change of the magnetic field of the magnet.
Wherein, the magnetic field sensor is any one of an AMR sensor, a GMR sensor or a TMR sensor.
The magnet is a spherical magnet, and the magnetic field sensor is a sensor for sensing the change of the direction of the magnetic field.
Wherein, the magnetite is the permanent magnet.
The driving motor comprises a magnetic core fixedly connected with the lens assembly, a conductive coil wound on the magnetic core and a magnet fixed on the inner wall of the annular shell;
the magnet is fixed on the magnetic core, and the magnetic field intensity generated by the magnet is greater than the magnetic field intensity after the conductive coil is electrified.
The circuit board is provided with a photosensitive chip, and the surface of the photosensitive chip, which is deviated from the circuit board, is provided with an optical filter in an attaching manner; the optical filter covers the photosensitive area of the photosensitive chip.
The utility model provides an automatic focusing camera module, which comprises a circuit board, an annular shell arranged on the circuit board, a driving motor arranged inside the annular shell and a lens component connected with the driving motor; wherein, the drive motor is provided with a magnet, and the circuit board is provided with a magnetic field sensor; when the driving motor drives the lens assembly to move and the distance between the magnet and the magnetic field sensor changes, the magnetic field sensor can sense the change of the magnetic field of the magnet. In the utility model, a magnetic field sensor is arranged on the circuit board, and a magnet is arranged on the driving motor; when the driving motor drives the magnet to drive the lens component to move, the magnetic field of the magnet at the position point of the magnetic field sensor changes, and the distance data of the driving motor and the lens component moving together can be determined based on the change rule of the magnetic field through the change of the magnetic field intensity detected by the magnetic field sensor. Compared with the technical scheme of the inner wall of the annular shell of the module of making a video recording of part setting such as magnetic field sensor among the prior art, the utility model discloses in need not in addition for magnetic field sensor provide with the circuit board between the signal transmission line, directly realize the signal connection between magnetic field sensor and the circuit board, got rid of the intermediate part between magnetic field sensor and the circuit board, simplified the inner structure of the module of making a video recording to a great extent, and then reduced the shared space volume of the module of making a video recording, be favorable to the miniaturized development of the module of making a video recording.
Drawings
In order to clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an auto-focus camera module in the prior art;
fig. 2 is a schematic structural diagram of an automatic zoom camera module according to an embodiment of the present invention;
fig. 3 is a schematic view of magnetic field lines of a magnet.
Detailed Description
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an auto-focus camera module in the prior art. In fig. 1, a lens unit 1, a driving motor 2 fixedly connected to the lens unit 1, an annular housing 3 provided on the outer peripheral portions of the driving motor 2 and the lens unit 1, a magnet 4 fixedly connected to the driving motor 2, a magnetic field sensor 5 provided on the inner wall of the annular housing 3, and a circuit board 6 provided below the annular housing 3 are sequentially provided from top to bottom, wherein the magnetic field sensor 5 and the circuit board 6 are electrically connected by a data connection line or the like.
In the related art, when the magnet 4 moves with the drive motor 2, the magnetic field sensor 5 is provided on the inner wall of the ring-shaped case closer to the magnet 4 so that the magnetic field sensor 5 can detect the change in the magnetic field of the magnet 4 at a closer distance. The magnetic field sensor 5 needs to transmit a signal after detecting the signal of the change of the magnetic field, so that the magnetic field sensor 5 and the circuit board 6 need to be connected through a complex circuit component such as a data transmission line, which is not shown in fig. 1, but it can be understood that the magnetic field sensor and the circuit board can be electrically connected based on some intermediate circuit components, which occupy the space inside the camera module to a certain extent.
Therefore, the utility model provides an automatic focusing's module of making a video recording in can simplify the circuit of connecting between magnetic field sensor 5 and the circuit board 6, and then reduces the space volume that the module of making a video recording occupied.
In the present invention, the upper, lower, left and right directions are described with reference to the upper, lower, left and right directions in the drawings, and do not represent the upper, lower, left and right directions of the camera module in practical use.
As shown in fig. 2, fig. 2 is a schematic structural diagram of an automatic zoom camera module provided by the embodiment of the present invention, the camera module specifically includes:
the lens module comprises a circuit board 6, an annular shell 3 arranged on the circuit board 6, a driving motor 2 arranged inside the annular shell 3, and a lens assembly 1 connected with the driving motor 2;
wherein, the drive motor 2 is provided with a magnet 4, and the circuit board 6 is provided with a magnetic field sensor 5; when the lens assembly 1 is driven by the driving motor 2 to move and the distance between the magnet 4 and the magnetic field sensor 5 changes, the magnetic field sensor 5 can sense the change of the magnetic field of the magnet 4.
Referring to fig. 2, in this embodiment, the magnetic field sensor 5 is directly disposed on the circuit board 6, so that the magnetic field sensor 5 and the circuit board 6 can be directly electrically connected to each other without disposing other intermediate circuit components, thereby simplifying the internal component structure of the camera module and further reducing the space volume occupied by the camera module.
As shown in fig. 1, the conventional magnetic field sensor 5 is disposed on the inner wall of the ring-shaped housing 2 in order to more sensitively sense the change in the magnitude of the magnetic field of the magnet 4 by making the magnetic field sensor 5 closer to the magnet. This problem can be overcome completely by increasing the magnetic field strength of the magnet 4 or by using a magnetic field sensor 5 having a higher sensitivity.
As shown in fig. 2, in the embodiment of the present invention, the magnetic field sensor 5 is directly disposed in the circuit board 6, and the circuit board 6 in the camera module is mainly used for installing various chips and realizing information interaction between various electronic devices and external components inside the camera module. The magnetic field sensor 5 is arranged on the circuit board 6, the magnetic field sensor 5 can be directly connected with the circuit board 6 through signals, unnecessary middle parts are removed, and internal parts of the camera module are simplified.
Alternatively, in another embodiment of the present invention, the magnetic field sensor 5 is any one of an AMR sensor, a GMR sensor or a TMR sensor.
At present, the magnetic field sensor 5 used in the auto zoom camera module is a hall magnetic field sensor, and the magnetic field sensor 5 can detect the change of the magnetic field only when the magnetic field strength reaches more than 300mT, so the distance between the magnetic field sensor 5 and the magnet 4 is not suitable for too long.
In this embodiment, the magnetic field sensor 5 may be any one of an AMR sensor, a GMR sensor, and a TMR sensor, and the sensitivity of these three types of magnetic field sensors is greatly improved with respect to the hall magnetic field sensor, and as long as the magnetic field strength reaches more than 10mT, the magnetic field change can be detected.
Certainly, to ensure that the magnetic field sensor 5 can still detect the magnetic field change of the magnet 4 when directly arranged on the circuit board 6, the magnet 4 with larger magnetic field intensity can be adopted to overcome the problem of low sensitivity of the magnetic field sensor 5.
In addition, the magnets 4 are not easily replaced, and thus the magnets 4 may be permanent magnets.
To sum up, the utility model provides an automatic focusing module of making a video recording will respond to drive motor 2 and go up magnetic field sensor 5 of the magnetic field intensity of magnetite 4 and directly set up on the circuit board, has simplified interconnecting link between magnetic field sensor 5 and the circuit board 6, and then has reduced the inside spare part of the module of making a video recording, is favorable to the miniaturized development of the module of making a video recording.
Alternatively, in another embodiment of the present invention, the magnet is a spherical magnet, and the magnetic field sensor 5 is a sensor for sensing a change in the direction of the magnetic field.
It should be noted that the hall magnetic field sensor in the prior art is a sensor for sensing the intensity of the magnetic field.
In the case of a magnet, the magnetic field lines of the magnet diverge from the origin of the magnet 4 in the circumferential direction, and as shown in fig. 3, fig. 3 is a schematic view of the magnetic field lines of the magnet, the solid lines in fig. 3 are the magnetic field lines of the magnet 4, and the arrows on the solid lines indicate the directions of the magnetic field lines; the broken line represents the movement locus of the magnetic field sensor relative to the magnet 4 when the magnet 4 moves.
Since the magnitude of the magnetic field lines is directly related to the density of the magnetic field lines, as can be seen from fig. 3, when the magnetic field sensor moves relative to the magnet from point a to point B, the magnitude of the magnetic field at the position of the magnetic field sensor 5 does not change much, but the direction of the magnetic field changes greatly, so that when the magnet 4 moves relative to the magnetic field sensor 5, the direction of the magnetic field at the position of the magnetic field sensor 5 changes more obviously, and is easier to detect. Therefore, the magnetic field sensor 5 for detecting the direction change of the magnetic field can be adopted in the embodiment to improve the accuracy of the detection result of the magnetic field sensor 5. In addition, the spherical magnet does not have a tip part, magnetic field lines which are dispersed to the periphery are distributed more uniformly, and the operation of converting the magnetic field change into the movement distance change is simpler.
Based on any of the above embodiments, in another specific embodiment of the present invention, the method may further include:
the driving motor 2 comprises a magnetic core 21 fixedly connected with the lens assembly 1, a conductive coil 22 wound on the magnetic core 21, and a magnet 23 fixed on the inner wall of the annular housing 3;
the magnet 4 is fixed on the magnetic core 21, and the magnetic field intensity generated by the magnet 4 is greater than the magnetic field intensity after the conductive coil 22 is electrified.
Specifically, the driving motor 2 may be a voice coil motor having a structure as shown in fig. 2, in which a core 21 and a conductive coil 22 are connected to the lens assembly 1, and a magnet 23 is provided on the annular housing 3. The magnetic core 21 and the conductive coil 22 are located in the magnetic field formed by the magnet 23, and once the conductive coil 22 is powered on, the magnet 23 generates a magnetic field force to drive the magnetic core 21 and the conductive coil 22 to move, thereby moving the lens assembly 1.
It should be noted that although the magnetic field sensor 5 senses that the magnet 4 follows the driving motor 2 and also senses the magnetic field of the magnet 4, the magnetic field generated by the magnet 4 is much larger than the magnetic field generated by the conductive coil 22, and the magnetic field sensor 5 hardly senses the magnetic field generated by the energized coil 22; the relative position between the magnet 23 and the magnetic field sensor 5 is fixed, so that the magnetic field sensor 5 does not detect the change of the magnetic field of the magnet 23; the detection result of the magnetic field sensor 5 is not disturbed by the magnetic field of the magnet 23 and the conductive coil 22.
Optionally, in another embodiment of the present invention, as shown in fig. 2, the method may further include:
a photosensitive chip 7 is arranged on the circuit board 6, and a light filter 8 is attached to the surface of the photosensitive chip 7, which is far away from the circuit board 6; the filter 8 covers the photosensitive area of the photosensitive chip 7.
As shown in fig. 1, in the conventional camera module, the light sensing chip 7 is disposed on the circuit board 6, and the optical filter 8 is disposed above the light sensing chip 7 in a suspended manner, and in order to avoid a lead at an edge of the light sensing chip 7, a part of space is inevitably reserved between the optical filter 8 and the light sensing chip 7.
As shown in fig. 2, in the embodiment, the optical filter 8 is directly attached to the surface of the photosensitive chip 7, so that the space occupied between the photosensitive chip 7 and the optical filter 8 is reduced, the height of the whole space of the camera module is reduced, and the development trend of image miniaturization of the camera module is facilitated.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Claims (6)
1. An automatic focusing camera module is characterized by comprising a circuit board, an annular shell arranged on the circuit board, a driving motor arranged in the annular shell and a lens assembly connected with the driving motor;
the driving motor is provided with a magnet, and the circuit board is provided with a magnetic field sensor; when the driving motor drives the lens component to move and the distance between the magnet and the magnetic field sensor changes, the magnetic field sensor can sense the change of the magnetic field of the magnet.
2. The autofocus camera module of claim 1, wherein the magnetic field sensor is any one of an AMR sensor, a GMR sensor, or a TMR sensor.
3. The autofocus camera module of claim 1, wherein the magnet is a spherical magnet and the magnetic field sensor is a sensor that senses a change in the direction of the magnetic field.
4. The autofocus camera module of claim 3, wherein the magnet is a permanent magnet.
5. The autofocus camera module of any of claims 1 to 4, wherein the drive motor comprises a core fixedly attached to the lens assembly, a conductive coil wound around the core, and a magnet fixed to an inner wall of the annular housing;
the magnet is fixed on the magnetic core, and the magnetic field intensity generated by the magnet is greater than the magnetic field intensity after the conductive coil is electrified.
6. The auto-focus camera module according to claim 5, wherein a photosensitive chip is disposed on the circuit board, and a surface of the photosensitive chip facing away from the circuit board is provided with an optical filter in an attached manner; the optical filter covers the photosensitive area of the photosensitive chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920996042.3U CN209823873U (en) | 2019-06-28 | 2019-06-28 | Automatic focusing camera module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920996042.3U CN209823873U (en) | 2019-06-28 | 2019-06-28 | Automatic focusing camera module |
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| Publication Number | Publication Date |
|---|---|
| CN209823873U true CN209823873U (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920996042.3U Active CN209823873U (en) | 2019-06-28 | 2019-06-28 | Automatic focusing camera module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111479046A (en) * | 2020-04-17 | 2020-07-31 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN111479047A (en) * | 2020-04-17 | 2020-07-31 | 维沃移动通信有限公司 | Camera shooting assembly and electronic equipment |
| CN114257706A (en) * | 2020-09-14 | 2022-03-29 | 宁波舜宇光电信息有限公司 | Camera shooting module |
| CN115550630A (en) * | 2022-01-21 | 2022-12-30 | 荣耀终端有限公司 | Lens position detection system, lens position detection method, voice coil motor and voice coil motor equipment |
-
2019
- 2019-06-28 CN CN201920996042.3U patent/CN209823873U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111479046A (en) * | 2020-04-17 | 2020-07-31 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| CN111479047A (en) * | 2020-04-17 | 2020-07-31 | 维沃移动通信有限公司 | Camera shooting assembly and electronic equipment |
| CN111479047B (en) * | 2020-04-17 | 2021-09-03 | 维沃移动通信有限公司 | Camera shooting assembly and electronic equipment |
| CN114257706A (en) * | 2020-09-14 | 2022-03-29 | 宁波舜宇光电信息有限公司 | Camera shooting module |
| CN115550630A (en) * | 2022-01-21 | 2022-12-30 | 荣耀终端有限公司 | Lens position detection system, lens position detection method, voice coil motor and voice coil motor equipment |
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