CN104932174B - double-camera module - Google Patents

Abstract

The invention relates to a double-camera module which comprises a circuit board, two image sensors, a base, a shell, a driving mechanism and two lens units. A first containing space, a second containing space and a third containing space are formed in the shell, and the driving mechanism comprises a first carrier, a second carrier, a third carrier, an upper elastic sheet, a lower elastic sheet, a magnet and a coil. When the coil is electrified through the circuit board, the coil is acted by an ampere force in a magnetic field generated by the magnet, so that the second carrier wound with the coil can move up/down along the optical axis direction, and the second carrier is connected with the first carrier and the third carrier through the connecting rod, so that the first carrier and the third carrier can be driven by the second carrier to move up/down simultaneously, namely, the lens units arranged on the first carrier and the third carrier are driven to move up/down. Because a driving mechanism is adopted to drive the two lens units simultaneously, the magnetic interference can be effectively reduced, and the picture quality is improved.

Description

Dual camera module

technical field

The invention relates to the technical field of camera modules, in particular to a dual camera module.

Background technique

At present, electronic devices such as mobile phones, notebook computers, and tablet computers are emerging new technologies that use dual camera modules to shoot the same object at the same time. dimensional image.

A traditional dual camera module consists of two independent camera modules mounted on the same circuit board. Each camera module includes a lens unit, a voice coil motor as a driver and carrying the corresponding lens unit, an image sensor for collecting captured image information, and a circuit for transmitting signals shared by two camera modules plate. The main components of each voice coil motor are coils, magnets and shrapnels. When energized, a current is generated in the coil, thereby inducing a magnetic field of a certain intensity. The coil is subjected to an Ampere force, and the direction of the force is along the optical axis, thereby changing the distance between the lens and the image sensor, thereby realizing the focusing function and capturing images.

However, when the above-mentioned dual-camera module is used, the voice coil motors in the two camera modules will generate magnetic interference with each other, reducing the quality of image capture.

Contents of the invention

Based on this, it is necessary to address the above problems and provide a dual camera module that can effectively avoid magnetic interference.

A dual camera module, comprising:

a circuit board including a mounting surface;

Two image sensors are distributed on the mounting surface at intervals and are electrically connected to the circuit board;

A base, which is hollow, is arranged on the installation surface, and the two image sensors are accommodated in the base;

A casing is a hollow structure with open ends, the bottom of which is arranged on the base, and a first accommodating space, a second accommodating space and a third accommodating space distributed at intervals are formed in the casing, The first accommodating space and the third accommodating space are respectively located on both sides of the second accommodating space, and the first accommodating space and the third accommodating space pass through the top of the housing;

A driving mechanism, including a first carrier, a second carrier, a third carrier, an upper elastic piece, a lower elastic piece, a magnet and a coil, the first carrier is accommodated in the first accommodating space, and the second carrier is accommodated in the In the second accommodating space, the third carrier is accommodated in the third accommodating space, the first carrier and the second carrier, the third carrier and the second carrier are connected through The rods are connected, the second carrier is cylindrical, the upper surface and the lower surface of the second carrier are respectively clamped on the upper elastic piece and the lower elastic piece, and the coil is wound on the second carrier the outer edge of the coil, and the coil is electrically connected to the circuit board, the magnet is arranged on the housing and accommodated in the second accommodating space, the magnet surrounds the coil and is spaced from the coil relative; and

Two lens units are respectively arranged on the first carrier and the third carrier.

In one of the embodiments, each lens unit includes a lens unit and a lens barrel, the lens unit is arranged in the lens barrel, and the two lens barrels are respectively arranged in the first carrier and the third carrier superior.

In one of the embodiments, the first carrier and the third carrier are provided with internal threads, the lens barrel is provided with external threads, and the lens barrel and the first carrier and the third carrier The internal thread is matched with the external thread.

In one of the embodiments, the first carrier, the second carrier, the third carrier and the connecting rod are integrally formed.

In one embodiment, a filter is further included, and the filter is disposed on the base and located between the lens unit and the image sensor.

In one of the embodiments, a groove is recessed on the inner side wall of the base, and the filter is inserted into the groove;

Or the inner side wall of the base protrudes to form a protrusion, and the filter is arranged on the protrusion.

In one of the embodiments, the circuit board is a flexible circuit board, and a reinforcement board is also provided, and the reinforcement board is provided on the surface of the flexible circuit board opposite to the installation surface;

Or the circuit board is a rigid circuit board.

In one of the embodiments, the upper elastic piece is provided with a first through hole, the lower elastic piece is provided with a second through hole, and the two ends of the second carrier are held in the first through hole respectively. and in the second through hole.

In one embodiment, the number of magnets is four, and the four magnets are evenly distributed in four corners of the second accommodating space.

In one of the embodiments, a connector is further included, and the connector is arranged at the extension end of the circuit board.

The aforementioned dual camera module has at least the following advantages:

When the coil is energized through the circuit board, because the coil is subjected to the ampere force in the magnetic field generated by the magnet, the second carrier wound with the coil can move up/down along the optical axis direction, because the second carrier connects with the first carrier, The third carrier is connected, so the second carrier can simultaneously drive the first carrier and the third carrier to move up/down, thereby driving the lens unit arranged on the first carrier and the third carrier to move up/down, changing the relationship between the lens unit and the third carrier The distance between the image sensors realizes the focusing function. Since a driving mechanism is adopted to simultaneously drive two lens units, the magnetic interference can be effectively reduced and the picture quality can be improved. Moreover, the two lens units move simultaneously with the movement of the second carrier, which solves the problem of inconsistent motion of the two lens units and improves picture precision.

Description of drawings

Fig. 1 is a top view of a dual camera module in an embodiment;

FIG. 2 is a cross-sectional view of the dual camera module shown in FIG. 1 .

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for purposes of illustration only and are not intended to represent the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

Please refer to Fig. 1 and Fig. 2 together, it is a dual-camera module 10 in an embodiment, and this dual-camera module 10 can be applied to such as digital camera, digital image recorder, mobile phone, smart mobile phone, monitor and other In electronic products with camera function. The dual camera module 10 includes a circuit board 100, two image sensors 200, a base 300, a housing 400, a driving mechanism 500, two lens units 600, a filter 700 and connectors (Fig. not shown).

The circuit board 100 includes a mounting surface 110 . Specifically, the circuit board 100 may be a flexible circuit board or a rigid circuit board. When the circuit board 100 is a flexible circuit board, a reinforcement board may also be provided. The reinforcement board is provided on the surface of the flexible circuit board opposite to the mounting surface 110 to smooth and strengthen the flexible circuit board.

The two image sensors 200 are spaced apart on the mounting surface 110 and electrically connected to the circuit board 100 . Specifically, the image sensor 200 may be a complementary metal oxide semiconductor (CMOS, Complementary Metal Oxide Semiconductor) image sensor or a charge-coupled device (CCD, Charge-coupled Device) image sensor.

The base 300 is hollow, and the bottom of the base 300 is disposed on the installation surface 110 , and the two image sensors 200 are accommodated in the base 300 .

The casing 400 is a hollow structure with open ends, and its bottom is disposed on the base 300 . A first accommodation space 410, a second accommodation space 420, and a third accommodation space 430 are formed in the housing 400 at intervals, and the first accommodation space 410 and the third accommodation space 430 are respectively located in the second accommodation space. 420 sides. The first accommodating space 410 , the second accommodating space 420 and the third accommodating space 430 may be substantially rectangular. The first accommodating space 410 and the third accommodating space 430 pass through the top of the casing 400 . That is to say, the top of the housing 400 is provided with through holes corresponding to the first accommodating space 410 and the third accommodating space 430, and the through holes communicate the first accommodating space 410 with the outside and communicate with the third accommodating space. 430 with exterior. The through hole can be circular to match the shape of the lens unit 600 .

The driving mechanism 500 includes a first carrier 510 , a second carrier 520 , a third carrier 530 , an upper elastic piece 540 , a lower elastic piece 550 , a magnet 560 and a coil 570 . The first carrier 510 is accommodated in the first accommodation space 410 , the second carrier 520 is accommodated in the second accommodation space 420 , and the third carrier 530 is accommodated in the third accommodation space 430 . The first carrier 510 and the second carrier 520, the third carrier 530 and the second carrier 520 are connected through the connecting rod 580, so the first carrier 510 and the third carrier 530 can move simultaneously with the movement of the second carrier 520, specifically , the first carrier 510 , the second carrier 520 , the third carrier 530 and the connecting rod 580 are integrally formed.

The first carrier 510 , the second carrier 520 and the third carrier 530 are roughly cylindrical. The second carrier 520 may be a solid cylinder, and the first carrier 510 and the third carrier 530 are hollow cylinders with through holes penetrating through their top and bottom surfaces. The upper surface and the lower surface of the second carrier 520 are clamped on the upper elastic piece 540 and the lower elastic piece 550 respectively. Specifically, an upper mounting plate and a lower mounting plate may be respectively arranged on the upper surface and the lower surface of the second carrier 520 , the upper elastic piece 540 is arranged on the upper mounting plate, and the lower elastic piece 550 is arranged on the lower mounting plate.

Specifically, the upper elastic piece 540 is provided with a first through hole (not shown in the figure), the side wall of the first through hole forms an elastic arm, and the elastic arm (not shown in the figure) has a certain elastic performance. A second through hole (not shown) is opened on the lower elastic piece 550. Specifically, the lower elastic piece 550 is formed by two separate parts, and the two separated parts form a rectangular structure with a second through hole inside. The side wall of the second through hole forms an elastic arm (not shown in the figure), and the elastic arm has certain elastic properties. Two ends of the second carrier 520 are held in the first through hole and the second through hole respectively, so the second carrier 520 can elastically move up and down between the upper elastic piece 540 and the lower elastic piece 550 .

The coil 570 is wound around the outer edge of the second carrier 520 , and the coil 570 is electrically connected to the circuit board 100 . Specifically, both ends of the coil 570 are respectively connected to two separate parts of the lower elastic piece 550 , and the lower elastic piece 550 is connected to the circuit board 100 , so that the circuit board 100 supplies power to the coil 570 .

The magnet 560 is disposed on the housing 400 , accommodated in the second accommodating space 420 , surrounds the coil 570 and faces the coil 570 at intervals. The number of magnets 560 is four, and the four magnets 560 are evenly distributed in four corners of the second accommodating space 420 . Each magnet 560 is opposite to the coil 570 at intervals. When the coil 570 is energized, the coil 570 is affected by the Ampere force in the magnetic field generated by the magnet 560 .

The two lens units 600 are respectively disposed on the first carrier 510 and the third carrier 530 . Specifically, each lens unit 600 includes a lens unit and a lens barrel, the lens unit includes a plurality of lenses, and the lens unit is disposed in the lens barrel. The two lens barrels are respectively disposed on the first carrier 510 and the third carrier 530 .

For example, internal threads can be provided on the first carrier 510 and the third carrier 530 , external threads can be provided on the lens barrel, and the lens barrel and the first carrier 510 and the third carrier 530 can be matched by internal threads and external threads. Certainly, in other implementation manners, the lens barrel and the first carrier 510 and the third carrier 530 may cooperate in other ways as long as the lens barrel moves with the movement of the first carrier 510 and the third carrier 530 .

The filter 700 is disposed on the base 300 and between the lens unit 600 and the image sensor 200 . Specifically, the filter 700 may be an infrared cut filter 700 . Specifically, in this embodiment, a protrusion is formed on the inner side wall of the base 300 , and the filter 700 is disposed on the protrusion. Certainly, in other implementation manners, a groove may also be formed by indenting on the inner side wall of the base 300 , and the optical filter 700 is inserted into the groove.

A connector (not shown in the figure) is disposed on the extension end of the circuit board 100 , and the connector is used for electrical connection with external components and for transmitting information of the image sensor 200 .

The aforementioned dual camera module 10 has at least the following advantages:

When the coil 570 is energized through the circuit board 100, because the coil 570 is subjected to the Ampere force in the magnetic field generated by the magnet 560, the second carrier 520 wound with the coil 570 can move up/down along the optical axis direction, because the second carrier 520 passes through The connecting rod 580 is sequentially connected with the first carrier 510 and the third carrier 530 through the connecting rod 580, so the second carrier 520 can drive the first carrier 510 and the third carrier 530 to move up/down at the same time, thereby driving the The lens unit 600 on the carrier 510 and the third carrier 530 moves up/down to change the distance between the lens unit 600 and the image sensor 200 to realize the focusing function. Since one driving mechanism 500 is used to simultaneously drive two lens units 600, the magnetic interference can be effectively reduced and the picture quality can be improved. Moreover, the two lens units 600 move simultaneously with the movement of the second carrier 520 , which solves the problem of inconsistent movement of the two lens units 600 and improves the picture accuracy. When the coil 570 stops being energized, the second carrier 520 returns to the original position under the elastic force of the elastic arms of the upper elastic piece 540 and the lower elastic piece 550 .

The above-mentioned embodiments only express several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but should not be construed as limiting the patent scope of the invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (9)

1. A dual camera module, characterized in that it comprises: a circuit board including a mounting surface; Two image sensors are distributed on the mounting surface at intervals and are electrically connected to the circuit board; A base, which is hollow, is arranged on the installation surface, and the two image sensors are accommodated in the base; A casing is a hollow structure with open ends, the bottom of which is arranged on the base, and a first accommodating space, a second accommodating space and a third accommodating space distributed at intervals are formed in the casing, The first accommodating space and the third accommodating space are respectively located on both sides of the second accommodating space, and the first accommodating space and the third accommodating space pass through the top of the housing; A driving mechanism, including a first carrier, a second carrier, a third carrier, an upper elastic piece, a lower elastic piece, a magnet and a coil, the first carrier is accommodated in the first accommodating space, and the second carrier is accommodated in the In the second accommodating space, the third carrier is accommodated in the third accommodating space, the first carrier and the second carrier, the third carrier and the second carrier are connected through The rods are connected, the first carrier, the second carrier, the third carrier and the connecting rod are integrally formed, the second carrier is cylindrical, and the upper surface and the lower surface of the second carrier are respectively clamped on the On the upper elastic piece and the lower elastic piece, the coil is wound on the outer edge of the second carrier, and the coil is electrically connected to the circuit board, and the magnet is arranged on the housing and accommodated in In the second accommodating space, the magnet surrounds the coil and is opposite to the coil at intervals; and Two lens units are respectively arranged on the first carrier and the third carrier. 2. The dual camera module according to claim 1, wherein each lens unit includes a lens unit and a lens barrel, the lens unit is arranged in the lens barrel, and the two lens barrels are respectively arranged in on the first carrier and the third carrier. 3. The dual-camera module according to claim 2, wherein the first carrier and the third carrier are provided with internal threads, the lens barrel is provided with external threads, and the lens barrel and the third carrier are provided with external threads. The first carrier and the third carrier cooperate with the outer thread through the inner thread. 4. The dual camera module according to claim 1, further comprising a filter, the filter is arranged on the base and is located between the lens unit and the image sensor . 5. The dual camera module according to claim 4, wherein a groove is recessed on the inner side wall of the base, and the optical filter is inserted into the groove; Or the inner side wall of the base protrudes to form a protrusion, and the filter is arranged on the protrusion. 6. The dual-camera module according to claim 1, wherein the circuit board is a flexible circuit board, and a reinforcement board is also provided, and the reinforcement board is arranged on the flexible circuit board opposite to the installation surface s surface; Or the circuit board is a rigid circuit board. 7. The dual camera module according to claim 1, wherein a first through hole is opened on the upper elastic piece, a second through hole is opened on the lower elastic piece, and the two ends of the second carrier respectively clamped in the first through hole and the second through hole. 8 . The dual camera module according to claim 1 , wherein the number of magnets is four, and the four magnets are evenly distributed in four corners of the second accommodation space. 9 . The dual camera module according to claim 1 , further comprising a connector, the connector being disposed on the extension end of the circuit board.