KR102638687B1 - Camera module and optical device - Google Patents

Abstract

The purpose of the present invention is to provide a camera module and optical device that are easy to manufacture due to convenient electrical connection between the aperture device included in the lens barrel and the main control device.
In order to achieve the above object, the present invention includes a base; a housing disposed on one side of the base; a lens barrel disposed inside the housing; a cover disposed on one side of the housing; a first substrate disposed on the other side of the base; an image sensor mounted on the first substrate and disposed below the lens barrel; an aperture set movably supported inside the housing and controlling the amount of light incident on the lens barrel; A first driving unit including a first magnet and a first coil that moves the lens barrel and the aperture set together in the optical axis direction; And a second substrate attached to the housing and including a plurality of terminals exposed to the outside for driving the first driver, wherein the aperture set has a second driver for driving the aperture disposed inside, A plurality of terminals are also connected to the second driving unit.

Description

Camera module and optical device

The present invention relates to camera modules and optical devices.

The content described below only provides background information for this embodiment and does not describe prior art.

As various types of portable terminals become widespread and wireless Internet services become commercialized, consumer demands related to portable terminals are also diversifying, and various types of additional devices are being installed on portable terminals.

Among them, a representative one is a camera module that takes photos or videos of a subject. Meanwhile, recent camera modules are equipped with an auto focus (AF) function that automatically adjusts focus depending on the distance to the subject. In addition, an optical image stabilization (OIS) function is applied to prevent the image from shaking due to camera shake.

Additionally, camera module configurations including an aperture device are being proposed to implement additional functions.

The aperture adjusts the degree of opening of the lens by a separate actuator. It is usually located between the front lens and the rear lens among the lens group of the camera module, so it has mobility in the direction of the optical axis and is continuously electrically connected to the main board. Since it must be maintained, there is a disadvantage that the manufacturing cost of the entire module increases.
(Patent Document 1) KR 10-2010-0138269 A

The present invention was developed to overcome the above-described problems, and its purpose is to provide a camera module and optical device that are easy to manufacture due to convenient electrical connection between the aperture device included in the lens barrel and the main control device.

In order to achieve the above object, the present invention includes a base; a housing disposed on one side of the base; a lens barrel disposed inside the housing; a cover disposed on one side of the housing; a first substrate disposed on the other side of the base; an image sensor mounted on the first substrate and disposed below the lens barrel; an aperture set movably supported inside the housing and controlling the amount of light incident on the lens barrel; A first driving unit including a first magnet and a first coil that moves the lens barrel and the aperture set together in the optical axis direction; And a second substrate attached to the housing and including a plurality of terminals exposed to the outside for driving the first driver, wherein the aperture set has a second driver for driving the aperture disposed inside, A plurality of terminals are also connected to the second driving unit.

Preferably, the aperture set includes: an aperture unit that adjusts the aperture of the incident tube incident on the lens barrel; An aperture support portion on which the aperture portion is fixed; and an elastic support part, one end of which is attached to the aperture support, and the other end of which is fixed to the second substrate.

More preferably, the elastic support part has a plurality of wires arranged to electrically connect the second substrate and the second driving part.

More preferably, the second driving unit includes a second magnet and a second coil, and the second substrate and the second coil are electrically connected.

Preferably, the lens barrel is disposed below the aperture portion.

Preferably, the lens barrel includes a first lens barrel and a second lens barrel that are spaced apart from each other, and the aperture portion is disposed between the first lens barrel and the second lens barrel.

Preferably, the first coil is mounted on the second substrate.

More preferably, it further includes a first Hall sensor mounted on the second board.

More preferably, the first Hall sensor and the first coil are electrically connected to the first substrate through the plurality of terminals.

Preferably, the aperture set further includes a second Hall sensor disposed therein, and the second Hall sensor is electrically connected to the second substrate through the elastic support part.

Preferably, the plurality of terminals is four.

More preferably, the plurality of terminals include a power line, a ground line, and two control lines.

More preferably, the two control lines are I2C communication wires.

Preferably, the driving wiring of the first driving unit and the driving wiring of the second driving unit are electrically connected to each other with the same properties.

Preferably, the aperture support portion is composed of a plurality of divided members.

Preferably, the aperture set further includes a lens coupling portion to which the lens barrel is coupled, and the lens barrel is coupled to the lens coupling portion.

Preferably, the lens coupling part further includes a first lens coupling part and a second lens coupling part, and the lens barrel includes a first lens barrel part and a second lens barrel part spaced apart from each other, and the first lens barrel includes a first lens barrel part and a second lens barrel part spaced apart from each other. The first lens barrel part is coupled to the first lens barrel part, the second lens barrel part is coupled to the second lens barrel part, and the aperture part is disposed between the first lens barrel part and the second lens barrel part.

Preferably, it further includes an infrared cut-off filter disposed between the lens barrel and the image sensor.

Preferably, the elastic support part is disposed between a fixing part in contact with one surface of the aperture support, a vertical connecting part coupled to the aperture part, a vertical withdrawing part coupled to the second substrate, and the fixing part and the vertical connecting part. It includes an elastic portion that provides elastic properties.

More preferably, the elastic portion includes a unit elastic portion that provides elastic properties by a plurality of bent portions, and two unit elastic portions are arranged symmetrically with respect to the centrally located opening portion.

Also, the main body; a display unit disposed on one side of the main body; and a camera module electrically connected to the display unit, wherein the camera module includes a base; a housing disposed on one side of the base; a lens barrel disposed inside the housing; a cover disposed on one side of the housing; a first substrate disposed on the other side of the base; an image sensor mounted on the first substrate and disposed below the lens barrel; an aperture set movably supported inside the housing and controlling the amount of light incident on the lens barrel; A first driving unit including a first magnet and a first coil that moves the lens barrel and the aperture set together in the optical axis direction; And a second substrate attached to the housing and including a plurality of terminals exposed to the outside for driving the first driver, wherein the aperture set has a second driver for driving the aperture disposed inside, A plurality of terminals are also connected to the second driving unit.

The camera module and optical device according to the present invention minimize the number of terminals connected to the outside by placing a control unit integrated with a sensor that detects the degree of opening of the aperture at the aperture unit, and also provide a terminal and an aperture for driving the auto focusing device. By implementing common terminals for driving and driving them selectively, wiring can be shared and simplified, thereby reducing the manufacturing cost of camera modules and optical devices.

1 is a perspective view showing the external appearance of a camera module according to the present invention.
Figure 2 is an assembly diagram of a camera module according to the present invention.
Figure 3 is a configuration diagram of an aperture set included in a camera module according to the present invention.
Figure 4 is a configuration diagram of the aperture part included in the camera module according to the present invention.
Figure 5 is a configuration diagram of an elastic support part included in the camera module according to the present invention.

Hereinafter, some embodiments of the present invention will be described through exemplary drawings. When assigning reference numerals to components in each drawing, identical components are indicated with the same reference numerals as much as possible, even if they are shown in different drawings.

Additionally, when describing the components of an embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, sequence, or order of the component is not limited by the term. When a component is described as being "connected," "coupled," or "connected" to another component, that component may be directly connected, coupled, or connected to that other component, but may not be connected to that component or that other component. It should be understood that another component may be “connected,” “coupled,” or “connected” between elements.

The “optical axis direction” used below is defined as the optical axis direction of the lens module when coupled to the lens driving device. Meanwhile, “optical axis direction” can be used interchangeably with “up/down direction”, “z-axis direction”, etc.

The "autofocus function" used below automatically focuses on the subject by adjusting the distance to the image sensor by moving the lens module in the optical axis direction according to the distance to the subject so that a clear image of the subject can be obtained on the image sensor. It is defined as a matching function. Meanwhile, “auto focus” can be used interchangeably with “AF (Auto Focus).”

The “image shake correction function” used below is defined as a function that moves or tilts the lens module in a direction perpendicular to the optical axis to offset vibration (movement) generated in the image sensor by external force. Meanwhile, “image stabilization” can be used interchangeably with “OIS (Optical Image Stabilization).”

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

The camera module 100 equipped with an aperture device according to the present invention has an external appearance as shown in FIG. 1.

It has a rectangular box-shaped appearance, with a lens located in the center of the front, and a first substrate 2 on which various elements for image signal processing, etc. are mounted on the back, but the appearance can be changed to another shape if necessary.

Meanwhile, as shown in FIG. 2, the camera module 100 has a housing 10 with a space formed on the front side of the base 1, and a first substrate 2 on the back side. .

At this time, the base 1 is sized to accommodate the area of the back of the housing 10, and a square-shaped through hole is formed in the center, and the through hole is mounted on the first substrate 2. Allow the sensor to be exposed to the lens.

Additionally, an infrared cut-off filter is disposed between the lens and the image sensor.

Meanwhile, the housing 10 has a rectangular box shape, but can be changed to another shape if necessary. A space is formed inside to accommodate other members, and an opening 11 is formed on the side.

A lens set 90 is disposed in the inner space of the housing 10, and the lens set 90 can be moved forward and backward for auto focusing within the housing 10.

Of course, normal lens driving devices for auto focusing are separately placed inside the housing 10, and a bobbin for driving the lens is also mounted on the outer surface of the lens set 90 to perform the function of moving the lens set 90. do.

If necessary, a first magnet is fixed to the lens set 90, and a first coil corresponding to the first magnet and a first Hall sensor that recognizes the position of the lens set 90 are installed on the side of the housing 10. It may be implemented as a first driving unit including.

At this time, a guide ball with low friction characteristics is disposed between the lens set 90 and the housing 10.

That is, the lens set 90 is moved up and down inside the housing 10 by the first driving unit.

Meanwhile, the lens set 90 has a first lens barrel 20 on the front, an aperture set 50 on the back of the first lens barrel 20, and a second lens on the back of the aperture set 50. Barrel portions 30 are respectively disposed.

The lens barrel including the first lens barrel portion 20 and the second lens barrel portion 30 includes a plurality of unit lenses, and the number of lenses is not particularly limited.

Here, the aperture set 50 plays the role of supporting the entire lens set 90 while contacting the inner surface of the housing 10.

In addition, the lens barrels (the first lens barrel portion 20 and the second lens barrel portion 30) are arranged so that their optical axes are aligned, and the aperture set 50 is configured to separate the incident light from the first lens barrel portion 20. It also performs the basic function of the aperture, which controls the aperture.

And when the lens set 90 is assembled on the inner surface of the housing 10, the cover 80 is coupled to the front of the housing 10.

If necessary, the cover 80 can be implemented in the form of a shield can that shields electromagnetic waves, and has a circular hole in the center so that the front of the unit lens located at the end of the first lens barrel portion 20 can be exposed to the outside. is formed, and the end is fixed by combining with the housing 10.

Meanwhile, as shown in FIG. 3, the aperture set 50 includes an aperture support portion 51.

The aperture support portion 51 is seated on the inner surface of the housing 10 and can move forward and backward of the housing 10, and serves as a structure that supports the entire aperture set 50.

Additionally, the first magnet, which is a component of the first driving unit, is fixed.

Additionally, if necessary, a plurality of members may be assembled by combining them with each other, and a seating portion 52 on which the aperture portion 60 can be seated is formed in the center.

The aperture part 60 is coupled to the seating part 52, and a guide part 53 is formed to facilitate the coupling of the aperture part 60. The guide part 53 is configured to guide the aperture part 60 by inserting it, but if necessary, it can be implemented using protrusions, etc.

In addition, the aperture support portion 51 includes a first lens coupling portion on which the first lens barrel portion 20 is mounted at the front, and a second lens coupling portion on which the second lens barrel portion 30 is mounted at the rear. do.

Of course, the first lens coupling portion and the second lens coupling portion are composed of a normal coupling structure such as a protrusion, a step, etc. that can be easily coupled with the first lens barrel portion 20 and the second lens barrel portion 30. It is desirable to be

Meanwhile, the aperture set 50 includes an aperture unit 60 shown in FIG. 4, and the aperture unit 60 has a hole 62 whose center coincides with the lens optical axis of the first lens barrel unit 20. ) is configured to include a body portion 61 formed.

In addition, an adjustment unit including a wing part (not shown) that adjusts the degree of opening of the hole 62, and a second driving part consisting of a second magnet and a second coil that are mechanically connected to the wing part to operate. (63) and includes a separate second Hall sensor (64) to recognize the operating position of the control unit (63).

The second Hall sensor 64 serves to recognize the degree of opening of the control unit 63 by detecting a change in magnetic force according to the position of the second magnet in the control unit 63.

Therefore, the operating position of the adjusting unit 63 is recognized by the signal from the second Hall sensor 64, the position of the wing portion is determined according to the operating position of the adjusting portion 63, and the final operating position is determined according to the position of the wing portion. Thus, the degree of openness of the hole 62 can be recognized.

The configuration of the aperture unit 60 described above is the same as that of a normal aperture, and the wings may be implemented in various forms. However, in the case of a small camera device, the two wings are arranged symmetrically to adjust the degree of opening of the hole 62. It is desirable to implement it in a controlled form.

Meanwhile, in addition to the above components, the aperture unit 60 according to the present invention further includes a control unit 69 that processes the signal from the second Hall sensor 64 to control the degree of opening of the adjustment unit 63. It is composed.

That is, the control unit 69 controls the opening conduction of the hole 62 by controlling the adjusting unit 63 based on the signal from the second hall sensor 64.

The control unit 69 can be configured separately, but if necessary, it can be configured with the second Hall sensor 64 built in.

In this case, it is preferable that the control unit 69 is placed at the location where the second Hall sensor 64 is located.

Meanwhile, according to the configuration of the control unit 69 as described above, there is no need to extract the signal from the second Hall sensor 64 to the outside, so the aperture unit 60 has four wires (power line, ground wire, and two control wires). If configured by connecting to the output terminal using a line), overall control is possible simply by connecting an external control device to the output terminal.

The two control lines can be implemented as communication lines for I2C (Inter-Integrated Circuit) communication, and in this case, the control unit 69 includes a communication module for I2C communication.

In addition, when including a first driving unit for auto focusing, the second Hall sensor 64 is located at a point that minimizes interference from the first magnet to detect the operating position of the second magnet of the adjusting unit 63. Alternatively, it is desirable to arrange the control unit 69 including the second Hall sensor 64.

Meanwhile, the aperture set 50 includes an elastic support portion 70 as shown in FIG. 5.

The elastic support portion 70 is composed of an FPCB, and includes a fixing portion 71 in contact with one surface of the aperture support portion 51, a vertical connection portion 72 coupled to the aperture portion 60, and the pull-out member 40. It includes a vertical draw-out portion 73 coupled with an elastic portion 75 composed of a plurality of unit elastic portions 74 disposed between the fixing portion 71 and the vertical connection portion 72 to provide elastic properties. .

Of course, the elastic support part 70 can be manufactured in an initial flat form so that the vertical connecting part 72 and the vertical drawing part 73 are bent and combined when assembled, but if necessary, it can also be manufactured in an initially bent form. there is.

In addition, the elastic support part 70 has four wires arranged in the vertical connecting part 72, the fixing part 71, the elastic part 75, and the vertical drawing part 73.

At this time, the wiring of the vertical connection part 72 is electrically connected to the aperture part 50, and the wiring of the vertical drawing part 60 is connected to each of the four terminals 41 disposed on the surface of the drawing member 40.

In addition, the elastic portion 75 includes unit elastic portions 74 spaced apart from each other, and the unit elastic portion 74 is composed of a plurality of bent portions to add appropriate elasticity to the lens set ( 90) corresponds to the movement of

Meanwhile, the second substrate 40 is coupled to the opening 11 formed on the side of the housing 10. Four upper and lower terminals 41 are attached to the surface of the second substrate 40, and the vertical withdrawal portion 73 of the elastic support portion 70 is in contact with the second substrate 40, and at the same time, the vertical withdrawal portion ( Four wires formed in 73) are electrically connected to the upper terminal 41.

Meanwhile, a first coil is located on the back of the second substrate 40 and a first Hall sensor is located in the center of the first coil, and corresponds to the first magnet attached to the aperture support part of the lens set 90, so that the entire The lens set 90 is moved up and down.

At this time, the first coil and the first Hall sensor are electrically connected to the lower terminal 41, and the upper terminal 41 and the lower terminal 41 are electrically connected through soldering to form the first driving unit and the second driving unit. is configured to share the same wiring.

In addition, both ends of the second board 40 are mounted on the first board 2 and linked with an external control device, and the first driver and the second driver can be selectively driven by I2C communication with the control device.

Meanwhile, in the case of a lens driving device (first driving unit) for auto focusing, the number of power lines used varies depending on the driving method, but the most common type has two communication lines for power, ground, and I2C communication as described above. Configurations including:

That is, since four wires are used and the properties of each wire are the same as those used in the aperture unit 50 according to the present invention, the first driving unit and the aperture unit 50 (second driving unit) according to the present invention are There is an advantage in being able to use common terminals. This has the advantage of reducing the soldering pad since both devices can be implemented through the same terminal depending on the I2C communication characteristics, and also minimizing the risk of UV curing during active alignment depending on the overall structural characteristics. .

Meanwhile, even when the lens driving device has less than four wires, the same advantage is provided when a terminal is shared in common with the wires of the aperture unit 50 depending on the properties of the wires.

Below, an optical device according to this embodiment will be described.

Optical devices may include mobile phones, mobile phones, smart phones, portable smart devices, digital cameras, laptop computers, digital broadcasting terminals, PDAs (Personal Digital Assistants), PMPs (Portable Multimedia Players), navigation devices, etc. there is. However, it is not limited to this and any device for taking videos or photos is possible.

The optical device may include a main body (not shown), a display unit (not shown), and a camera module 100.

The body may form the appearance of the optical device. As an example, the main body may include a rectangular parallelepiped shape. However, it is not limited to this. As a variation, at least a portion of the main body may be formed to be round. The main body can accommodate the camera module 100. A display unit may be disposed on one side of the main body.

The camera module 100 may be placed in the main body. The camera module 100 may be placed on one side of the main body. At least a portion of the camera module 100 may be accommodated inside the main body. The camera module 100 can capture images of a subject. The camera module 100 may be electrically connected to the display unit.

The display unit may be placed in the main body. The display unit may be placed on one side of the main body. That is, the display unit may be placed on the same side as the camera module 100. Alternatively, the display unit may be disposed on one side and another side of the main body. At least a portion of the display unit may be accommodated inside the main body. The display unit may be placed on a side opposite to the side where the camera module 100 is placed. The display unit may output the image or video signal captured by the camera module 100 as a visualized image or video.

In the above, just because all the components constituting the embodiment of the present invention have been described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, as long as it is within the scope of the purpose of the present invention, all of the components may be operated by selectively combining one or more of them. In addition, terms such as “include,” “comprise,” or “have” described above mean that the corresponding component may be present, unless specifically stated to the contrary, and thus do not exclude other components. Rather, it should be interpreted as being able to include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be construed as being included in the scope of rights of the present invention.

1: Base 2: First substrate
10: housing 11: opening
20: first lens barrel portion 30: second lens barrel portion
40: second board 41: terminal
50: Aperture set 51: Aperture support
52: Seating part 53: Guide part
60: Aperture part 61: Body part
62: Hole 63: Control unit
64: 2nd Hall sensor 69: Control unit
70: elastic support part 71: fixing part
72: Vertical connection part 73: Vertical withdrawal part
74: unit elastic portion 75: elastic portion
90: Lens set 100: Camera module

Claims (21)

first substrate;
an image sensor disposed on the first substrate;
a housing disposed on the first substrate;
a lens barrel disposed within the housing;
an aperture unit that adjusts the amount of light incident on the lens barrel;
a first driving unit including a first magnet and a first coil that moves the lens barrel in the optical axis direction;
a second board disposed in the housing and including terminals exposed to the outside;
a second driving unit including a second magnet and a second coil and driving the aperture unit;
a first Hall sensor disposed on the second substrate and detecting the first magnet; and
It includes a second Hall sensor that detects the second magnet,
The aperture unit is combined with the lens barrel and moves in the optical axis direction,
The first coil, the second coil, the first Hall sensor, and the second Hall sensor are electrically connected to the second substrate. According to paragraph 1,
An aperture support portion on which the aperture portion is fixed; and
A camera module including an elastic support part whose one end is coupled to the aperture support part and the other end fixed to the second substrate. According to paragraph 2,
A camera module in which the elastic support part has a plurality of wires arranged to electrically connect the second substrate and the second driving part. According to paragraph 1,
The first coil, the second coil, the first Hall sensor, and the second Hall sensor are electrically connected to the terminal of the second board. According to paragraph 1,
The lens barrel is a camera module disposed below the aperture unit. According to paragraph 1,
The lens barrel includes a first lens barrel portion and a second lens barrel portion spaced apart from each other,
A camera module wherein the aperture unit is disposed between the first lens barrel unit and the second lens barrel unit. According to paragraph 1,
The first coil is a camera module disposed on the second substrate. According to paragraph 1,
Including a plurality of lenses coupled to the lens barrel,
A camera module in which the aperture unit is disposed above a lens disposed highest among the plurality of lenses. According to paragraph 1,
A camera module in which the first Hall sensor and the first coil are electrically connected to the first substrate through the terminal of the second substrate. According to paragraph 2,
The second Hall sensor is a camera module electrically connected to the second substrate through the elastic support part. According to paragraph 1,
The terminal of the second board is a camera module including a power line, a ground line, and two control lines. According to clause 11,
A camera module where the two control lines include I2C communication wiring. According to paragraph 1,
A camera module wherein the driving wiring of the first driving unit and the driving wiring of the second driving unit include a common terminal. According to paragraph 2,
A camera module in which the aperture support part is made up of a plurality of divided members. According to paragraph 2,
The aperture support part is a camera module including a lens coupling part to which the lens barrel is coupled. According to clause 15,
The lens coupling unit includes a first lens coupling unit and a second lens coupling unit,
The lens barrel includes a first lens barrel portion and a second lens barrel portion spaced apart from each other,
The first lens barrel portion is coupled to the first lens coupling portion, and the second lens barrel portion is coupled to the second lens coupling portion,
A camera module wherein the aperture unit is disposed between the first lens barrel unit and the second lens barrel unit. According to paragraph 1,
A camera module including an infrared cut-off filter disposed between the lens barrel and the image sensor. According to paragraph 2,
The elastic support part is disposed between a fixing part in contact with one surface of the aperture support, a vertical connection part coupled to the aperture part, a vertical withdrawal part coupled to the second substrate, and the fixing part and the vertical connection part. A camera module including an elastic portion that provides elastic properties. According to clause 18,
The elastic portion includes a unit elastic portion that provides elastic properties by a plurality of bent portions,
A camera module in which two unit elastic units are arranged symmetrically with respect to an opening located in the center. first substrate;
an image sensor disposed on the first substrate;
a housing disposed on the first substrate;
a lens barrel disposed within the housing;
an aperture unit that adjusts the amount of light incident on the lens barrel;
a first magnet and a first coil that move the lens barrel;
a second magnet and a second coil that drive the aperture unit;
A first Hall sensor that detects the first magnet;
A second Hall sensor that detects the second magnet; and
It includes a second board disposed in the housing and including terminals exposed to the outside,
The aperture unit is coupled to the lens barrel and moves in the optical axis direction together with the lens barrel,
The first coil, the second coil, the first Hall sensor, and the second Hall sensor are electrically connected to the second substrate. main body;
a display unit disposed on one side of the main body; and
An optical device comprising the camera module of any one of claims 1 to 20, electrically connected to the display unit.

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