KR20220010979A - Camera module and portable terminal - Google Patents

Abstract

A camera module disclosed in an embodiment of the present invention comprises: a first lens holder including a first lens having a first effective diameter on one region of a housing; a first reflective mirror changing a path of light passing through the first lens holder; and an image sensor converting the light that passed through the first reflective mirror into an electrical signal. The first effective diameter is larger than a width of an incident side of the first reflective mirror and longer than a diagonal length of the image sensor. The first lens holder can adjust a focus by moving up or down in an optical axis direction. Accordingly, the present invention can move up or down an external lens with a large effective diameter in the optical axis direction or a case direction of a terminal.

Description

Camera module and mobile terminal {CAMERA MODULE AND PORTABLE TERMINAL}

An embodiment of the invention relates to a camera module and a mobile terminal having the same.

As smartphones or tablet PCs become popular, camera modules mounted on portable terminals such as smartphones or tablet PCs are replacing portable cameras (digital cameras, etc.). Accordingly, users take it for granted that a high-spec camera is mounted on a portable terminal.

As the development of camera modules to which high-definition sensors are applied has rapidly increased and multifunctional smart phones such as high-magnification phones and foldable phones have been developed, a part of the camera module is protruding, so the height of the camera module with high magnification has been increased. There is a demand to reduce.

An embodiment of the invention may provide a camera module having a lens having an effective diameter greater than the thickness of the terminal.

An embodiment of the present invention may provide a camera module having an external lens having a large effective diameter and an internal lens having a small effective diameter.

An embodiment of the present invention may provide a camera module having a reflective mirror between an external lens having a large effective diameter and an internal lens having a small effective diameter.

An embodiment of the present invention can provide a camera module capable of raising or lowering an external lens having a large effective diameter in the optical axis direction or in the case direction of the terminal, and a mobile terminal having the same.

A camera module according to an embodiment of the present invention includes a housing; a first lens holder including a first lens having a first effective diameter in an area of the housing; a first reflection mirror for changing a path of light passing through the first lens holder; and an image sensor that converts the light passing through the first reflection mirror into an electrical signal, wherein the first effective mirror is greater than an incident side width of the first reflection mirror, and the first effective mirror is a diagonal of the image sensor. greater than the length, and the first lens holder may be moved up or down in the first optical axis direction by the first driving unit.

According to an embodiment of the invention, the first lens holder may include a second lens having a second effective diameter between the first lens and the first reflection mirror, and the second effective diameter may be smaller than the first effective diameter. .

According to an embodiment of the present invention, the second effective diameter is in the range of 80% to 95% of the first effective diameter, and may be larger than the incident side width of the first reflection mirror.

According to an embodiment of the invention, a second lens holder having at least one lens group is included between the first reflection mirror and the image sensor, and the second lens holder is a first reflection mirror or an image by a second driving unit. It can be moved towards the sensor.

According to an embodiment of the present invention, the first effective diameter may be in the range of 10 mm to 20 mm.

According to an embodiment of the invention, a second reflection mirror is further included on the other side of the housing and on the incident side of the image sensor, wherein the second reflection mirror reflects the light reflected by the first reflection mirror to the image sensor. can do.

According to an embodiment of the invention, the first lens holder may include a first cylinder having a hollow cylindrical shape; a second cylinder supporting the first lens inside the first cylinder and having a hollow cylinder shape and rotatably coupled; a holding part for maintaining a distance between the first cylinder and the second cylinder; and a guide part formed between the first cylinder and the second cylinder to guide the movement of the second cylinder so that a position relative to the first cylinder changes when the first cylinder rotates.

The mobile terminal according to an embodiment of the present invention includes a case of the mobile terminal in which the camera module is installed on one surface or the other surface, and the first effective diameter of the first lens holder of the camera module may be greater than the thickness of the mobile terminal.

According to an embodiment of the invention, by providing a camera module having a lens with an effective diameter greater than the thickness of the mobile terminal, high magnification zoom may be realized.

According to an embodiment of the present invention, a lens having a large effective diameter can be increased or decreased in the optical axis direction on a mobile terminal to provide a long total top length (TTL) of the lens.

An embodiment of the present invention provides functions of automatic focus adjustment, zoom, and handshake correction by using a camera module having an external lens having a large effective diameter and an internal lens having a small effective diameter based on a reflective mirror that switches the path of incident light. can

According to the embodiment of the present invention, it is possible to provide a camera module having one or a plurality of lenses having an effective diameter greater than the thickness of a mobile terminal.

The camera module according to an embodiment of the present invention can improve the exterior design of a high magnification phone, thereby improving the reliability of a mobile terminal such as a multifunction phone.

1 is a perspective view showing a partial cross-section of a camera module according to an embodiment of the present invention.
FIG. 2 is a first example of a cross-sectional side view of the camera module of FIG. 1 .
3 is an example illustrating a driving unit of the camera module of FIG. 2 .
FIG. 4 is a second example of a cross-sectional side view of the camera module of FIG. 1 .
FIG. 5 is a third example of a cross-sectional side view of the camera module of FIG. 1 .
6 is a perspective view illustrating a first cylinder of the first lens holder of the camera module of FIGS. 1 to 5 .
7 is a perspective view illustrating a second cylinder of the first lens holder of the camera module of FIGS. 1 to 5 .
8 is a perspective view of the first lens holder showing a state in which the first cylinder and the second cylinder of FIGS. 6 and 7 are coupled.
9 is a perspective view of a first lens holder of the camera module of FIG. 8 .
10 is a cross-sectional view illustrating an operating state of the first lens holder of FIG. 9 .
11 (A) (B) is a view showing an operation example of the pop-up or pop-down of the first lens holder.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The technical spirit of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of the components between the embodiments are selectively combined , can be used as a substitute. In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be generally understood by those of ordinary skill in the art to which the present invention pertains, unless specifically defined and described. It may be interpreted as a meaning, and generally used terms such as terms defined in advance may be interpreted in consideration of the contextual meaning of the related art. In addition, the terminology used in the embodiments of the present invention is for describing the embodiments and is not intended to limit the present invention. In the present specification, the singular form may also include the plural form unless otherwise specified in the phrase, and when it is described as "at least one (or more than one) of A and (and) B, C", it is combined as A, B, C It can contain one or more of all possible combinations. In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish the component from other components, and the essence, order, or order of the component is not determined by the term. And, when it is described that a component is 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also with the component It may also include a case of 'connected', 'coupled' or 'connected' due to another element between the other elements. In addition, when it is described as being formed or disposed on "above (above) or below (below)" of each component, the top (above) or bottom (below) is one as well as when two components are in direct contact with each other. Also includes a case in which another component as described above is formed or disposed between two components. In addition, when expressed as "upper (upper) or lower (lower)", a meaning of not only an upper direction but also a lower direction based on one component may be included.

The 'optical axis direction' used below is defined as the optical axis direction of the lens of the camera device. In this case, the optical axis of the lens may correspond to the optical axis of the image sensor. Meanwhile, the 'optical axis direction' may correspond to a 'vertical direction' or a 'z-axis direction'.

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

The 'shake correction function' used below is defined as a function of moving or tilting the lens in a direction perpendicular to the optical axis direction to cancel vibration (movement) generated in the image sensor by an external force. Meanwhile, 'hand shake correction' may be used interchangeably with 'Optical Image Stabilization (OIS)'.

Hereinafter, "dual or triple camera" and "camera device" may be used interchangeably. That is, the camera device may be described as including two or three lens modules.

A mobile terminal is any one of a mobile phone, a mobile phone, a smart phone, a portable smart device, a digital camera, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and a navigation device can be However, the type of mobile terminal is not limited thereto, and any device for taking an image or photo may be included in the optical device.

The mobile terminal may include a main body. The body may form the exterior of the mobile terminal. The body can accommodate the camera device. A display unit may be disposed on one surface of the body. For example, the display unit and the camera device may be disposed on one surface of the main body, and the camera device may be additionally disposed on the other surface (a surface positioned opposite to the one surface) of the body. At least a part of the camera device may be accommodated in the body. A plurality of camera devices may be provided. The camera device may be disposed on one surface of the main body and the other surface of the main body, respectively. The camera device may capture an image of the subject. The camera device may include a lens driving device. The lens driving device may be a lens driving motor or a voice coil motor. The camera device may include at least one or both of an AF actuator and an OIS actuator.

The height of a folded camera is usually less than that of an upright camera with a similar effective focal length (EFL). The reduction in folded camera height results from the fact that the folded camera height does not depend on the lens height, which correlates with the lens focal length. In an upright camera, its height depends on the lens height. Accordingly, the camera focal length can be increased without sacrificing the camera module height.

<Example>

1 is a perspective view showing a partial cross-section of a camera module according to an embodiment of the present invention, FIG. 2 is a first example of a side cross-sectional view of the camera module of FIG. 1, and FIG. 3 is an example showing a driving unit of the camera module of FIG. , FIG. 4 is a second example of a cross-sectional side view of the camera module of FIG. 1 , and FIG. 5 is a third example of a cross-sectional side view of the camera module of FIG. 1 .

1 to 3 , the housing 180 may be disposed at the rear or front of the mobile terminal. The housing 180 may include a first lens holder 110 in one area, a second lens holder 130 therein, and a first reflection mirror 120 .

The first lens holder 110 may be provided in a structure that is exposed or protruded from one area of the housing 180 . The first lens holder 110 includes lenses 111 and 112 and a cylindrical member 115 , and the lenses 111 and 112 are disposed in the cylindrical member 115 in the first optical axis Lz1 direction M1 and/or It may move in a direction (horizontal direction, M2) perpendicular to the first optical axis Lz1.

The lenses 111 and 112 of the first lens holder 110 may include a stacked structure of the first lens 111 and the second lens 112 from the object side. The first lens 111 is the lens closest to the object side and may have the largest first effective diameter A1 in the camera module. The first effective mirror A1 is the size of the area on which the light is incident and may be larger than the thickness of the mobile terminal. The first effective diameter A1 may be 10 mm or more, for example, in the range of 10 mm to 20 mm or in the range of 10 mm to 17 mm. The first lens 111 having the first effective diameter A1 provides a wide angle of incidence, so that a bright aperture can be secured and a high-magnification zoom can be easily implemented.

A first effective diameter A1 of the first lens 111 may be greater than a diagonal length A5 of the image sensor 170 . For example, the diagonal length A5 of the image sensor 170 may be 5 mm or more, for example, in the range of 5 mm to 8 mm or in the range of 6 mm to 8 mm, and the first effective diameter A1 is the diagonal of the image sensor 170 . It may range from at least 1.5 times the length, from 1.5 times to 4 times, or from 2 times to 3 times the length.

The second lens 112 may be disposed between the first lens 111 and the first reflection mirror 120 . The second lens 112 may have a second effective diameter A2, and the second effective diameter A2 may be smaller than the first effective diameter A1. For example, the second effective diameter A2 may be 95% or less or in a range of 80% to 95% of the first effective diameter A1. The second effective diameter A2 may be greater than the diagonal length of the image sensor 170 and may be 15 mm or less, for example, in the range of 8 mm to 15 mm or in the range of 8 mm to 12 mm. The second lens 112 having the second effective mirror A2 may transmit the light incident through the first lens 111 to the entire area of the first reflection mirror 120 .

Here, in the first lens 111 , the object-side first surface S1a may be convex and the image-side surface may be concave. The object-side first surface S1a of the first lens 111 may be formed of an aspherical surface, and the image-side surface may be formed of an aspherical surface. As another example, the object-side surface or the upper surface may be a spherical surface. The first lens 111 may be formed of a plastic material or a glass material.

The object-side surface of the second lens 112 may be convex or concave, and the image-side surface may be convex or concave. The object-side surface of the first lens 111 may be formed of a spherical or aspherical surface, and the image-side surface may be a spherical or aspherical surface. The second lens 112 may be formed of a plastic material or a glass material.

The first lens 111 may have a positive refractive power, and the second lens 112 may have a positive refractive power or a negative refractive power.

1 and 3, the cylindrical member 115 supports the outer periphery of the first lens 111 and the second lens 112, that is, the flange portion, and when the camera is in the on mode, the optical axis direction ( The rotation guide is made so that it can pop-up to M1). Conversely, if the camera is in the off mode, it is restored to be pop-down in the optical axis direction M1.

The cylindrical member 115 may be rotationally driven by a driving unit. The cylindrical member 115 is moved in the optical axis direction by rotating the at least two-stage cylinders 151 and 153 from the housing 180 by the driving unit. The driving unit may include at least one of a piezo member, an actuator, and a stamping motor. The driving unit may turn up or down the retaining protrusion on the outer periphery of the two-stage cylindrical (151, 153) structure with rotation. In addition, the cylindrical member 15 may be moved in the horizontal direction by a separate driving unit, thereby providing an OIS function. The driving unit may include a mover and a driver, the mover may be a magnet, and the driver may be a coil.

Here, the cylindrical member 115 rotationally moves the first and second lenses 111 and 112 in the direction of the first optical axis Lz1 using the first cylinder 151 and the second cylinder 153. The moving distance (ie, height) H1 of 2 may be moved by 5% or more of the first effective diameter A1, for example, in the range of 5% to 10%. The moving distance H1 may be in the range of 1.5 mm or more, for example, 1.5 mm to 2.3 mm or 1.8 mm to 2.2 mm. The cylindrical member 115 will be described with reference to FIGS. 6 to 10 .

The first reflection mirror 120 changes the first optical axis Lz1 of the light incident through the second lens 112 of the first lens holder 110 to the second optical axis Ly1. The first reflection mirror 120 may be formed of an inclined mirror or a triangular prism material.

2, the incident side width A3 of the first reflection mirror 120 may be smaller than the first and second effective diameters A1 and A2, and 7 mm or less, for example, in the range of 4 mm to 7 mm or 4.5 mm to It may be in the range of 6 mm. The vertical height of the first reflecting mirror 120 may be smaller than the first and second effective mirrors A1 and A2, and may be 7 mm or less, for example, in the range of 4 mm to 7 mm or in the range of 4.5 mm to 6 mm. The first reflecting mirror 120 changes the path of the light incident through the first and second lenses 111 and 112 of the first lens holder 110 to transmit it to the second lens holder 130 .

The second lens holder 130 may include one or a plurality of lenses 131 . The lens 131 of the second lens holder 130 may be disposed between the first reflection mirror 120 and the image sensor 170 . The lenses 131 of the second lens holder 130 may be stacked in a plurality of lens groups G1, G2, and G3 in the first reflection mirror 120, for example, the first to third lens groups G1, G2 and G3), and each of the first to third lens groups G1, G2, and G3 may include at least one lens, and may be stacked with the same number of lenses or different numbers of lenses. At least one or two or more of the first to third lens groups G1, G2, and G3 may be moved in the second optical axis Ly1 direction, that is, horizontally moved to adjust the zoom magnification. The horizontal movement moves the second lens holder 130 toward the first reflection mirror 120 or toward the image sensor 170 by a separate driving unit to adjust the zoom magnification.

The light traveling through the second lens holder 130 may be condensed by the image sensor. The image sensor 170 converts the light incident through the second lens holder 130 into an electrical signal. The image sensor 170 may be mounted on a printed circuit board. The printed circuit board may be a board made of a flexible material or a board made of a non-flexible material.

A direction in which light is incident on the image sensor 170 may be a direction perpendicular to the first optical axis. A direction horizontal to the upper surface of the image sensor 170 may be a direction perpendicular to the second optical axis. The image sensor 170 may be any one of a charge coupled device (CCD), a complementary metal-oxide semiconductor (CMOS), a CPD, and a CID. The image sensor 170 may be a color (RGB) sensor, and the other one may be a black and white sensor.

An optical filter (not shown) may be disposed between the image sensor 170 and the second lens holder 130 . The optical filter may include an infrared cut filter, an infrared absorption filter, or an infrared reflection filter, and blocks light in the infrared region. The optical filter may be formed by coating an infrared blocking coating material on a plate-shaped optical filter such as a cover glass for protecting an imaging surface or a cover glass.

Here, the distance D1 between the emission side surface of the first reflection mirror 120 and the image sensor 170 is 6 mm or less or a space within the range of 4.5 mm to 5.5 mm is provided, and within this space, a lens group ( The lenses 131 of the second lens holder 130 having G1, G2, and G3 may be moved.

According to the camera module of the embodiment of the present invention, the first lens 111 having the largest first effective diameter A1 in the camera module is attached to the first lens holder 110 disposed in one area of the housing 180 on the object side. By disposing it closest to , it is possible to provide an aperture of brighter light from the outside, and not only can the amount of light be improved, but also the ratio of ambient light can be improved.

The first lens holder 110 may be up or down in the direction of the first optical axis Lz1, and the lens groups G1, G2, and G3 in the second lens holder 130 are moved in the direction of the second optical axis Ly1. By moving, it may be possible to implement a high magnification zoom. Since the first lens holder 110 may be up or down in the direction of the first optical axis Lz1, the TTL of the camera module may be provided in the range of 9 mm or more, for example, in the range of 9 mm to 20 mm or in the range of 11 mm to 18 mm.

Accordingly, in the camera module, the first lens holder 110 may be moved up or down from one side of the housing 180 toward the object side, thereby providing a longer TTL length. Also, when the camera is on, the first lens holder 110 is raised and focused, so that a high magnification zoom can be implemented. In addition, when the first lens holder 110 is in close contact with the housing 180 or moves to the original position, the focus may not be focused and may be in an off mode, and may be stably adhered to the housing 180 .

4 is a side cross-sectional view of a second example of the camera module of FIG. 1 . In the description of FIG. 4 , the same configuration as that of FIGS. 1 to 3 will be referred to the description of FIGS. 1 to 3 .

Referring to FIG. 4 , the camera module includes a first lens holder 110 having first and second lenses 111 and 112 , a first reflection mirror 120 , and a first lens having a lens 131 of the lens groups G1 and G2. It may include two lenses 130A, a second reflection mirror 125 , and an image sensor 170 .

The first reflecting mirror 120 reflects the light incident through the first and second lenses 111 and 112 of the first lens holder 110 toward the second reflecting mirror 125, and the second reflecting mirror 125 ) is reflected toward the image sensor 170 . The light incident on the first lens holder 110 is transmitted based on a first optical axis Lz1, and the second lens holder 130 is disposed between the first and second reflecting mirrors 120 and 125 on the second optical axis ( Light is provided based on Ly1), and the image sensor 170 may collect light incident based on the third optical axis Lz2. The first optical axis Lz1 and the third optical axis Lz2 may be parallel to each other and may be perpendicular to the second optical axis Ly1. The configuration of the first lens holder 110 will be described with reference to FIGS. 1 to 3 , and repeated descriptions of the same configuration will be omitted.

In the second lens holder 130A, at least two lens groups G1 and G2 may be moved in a horizontal direction to provide a high magnification zoom function. The horizontal movement moves the second lens holder 130 toward the first reflection mirror 120 or toward the second reflection mirror 125 by a separate driving unit to adjust the zoom magnification.

The second reflection mirror 125 may have a shape of an inclined mirror or a triangular prism. The width of the incident side of the second reflection mirror 125 may be smaller than the first effective diameter A1, and may be 7 mm or less, for example, in the range of 4 mm to 7 mm or in the range of 4.5 mm to 6 mm. The vertical height of the second reflection mirror 125 may be smaller than the first effective diameter A1, and may be 7 mm or less, for example, in the range of 4 mm to 7 mm or in the range of 4.5 mm to 6 mm. The second reflection mirror 125 changes the path of the light incident through the lens groups G1 and G2 of the second lens holder 130 to transmit it to the image sensor 170 .

The image sensor 170 is disposed on the other side of the housing 180 , and the light reflected by the second reflection mirror 125 may be condensed. Here, although the image sensor 170 has been described as being disposed above the second reflection mirror 125 , it may be disposed below.

5 is a side cross-sectional view of a third example of the camera module of FIG. 1 . In the description of FIG. 5 , the same configuration as that of FIGS. 1 to 3 will be referred to the description of FIGS. 1 to 3 .

Referring to FIG. 5 , the camera module may include a first lens holder 110 having first and second lenses 111 and 112 , a first reflection mirror 120 , and an image sensor 170 . The housing 180 includes the first reflection mirror 120 and may be provided without the second lens holders 130 and 130A. That is, the first lens holder 110 may adjust the focus and magnification of the first and second lenses 111 and 112 by using a cylindrical member.

In the mobile terminal according to an embodiment of the present invention, the camera module disclosed above is mounted to photograph a subject. The camera module may include a first lens holder 110 and a second lens holder 130, and automatic focusing (Auto Focusing, hereafter referred to as AF), zoom and optical image stabilizing (hereinafter referred to as OIS). ), it is possible to prevent the thickness of the mobile terminal from increasing even if such functions are provided. Accordingly, it is possible to miniaturize the mobile terminal and provide a thinner thickness. The camera module according to an embodiment of the present invention may include at least one of AF, Zoom, and OIS functions.

Since the camera module having the AF, zoom and OIS functions, etc., must be provided with various parts, the size of the camera module may increase compared to a general camera module. If the size of the camera module increases, it may become a problem in miniaturization of a mobile terminal in which the camera module is mounted. For example, in the camera module, the number of laminated lenses increases for the zoom function, and when a plurality of laminated lenses are formed in the thickness direction of the terminal, the thickness of the terminal also increases according to the number of laminated lenses. Accordingly, if the thickness of the terminal is not increased, the number of stacked lenses cannot be sufficiently secured, and the zoom performance is weakened. In addition, in order to implement the AF and OIS functions, an actuator that moves the lens group in the optical axis direction or in a direction perpendicular to the optical axis must be installed. When the optical axis of the lens group is formed in the thickness direction of the terminal, the lens group is moved The actuator for the portable electronic device should be installed in the thickness direction of the portable electronic device. Accordingly, the thickness of the terminal increases.

However, in the camera module according to the embodiment of the present invention, since the first optical axis Lz1 of the first and second lenses 111 and 112 is disposed perpendicular to the thickness direction of the mobile terminal (that is, in a direction parallel to the wide surface of the mobile terminal) placement), AF, Zoom and OIS functions, even if the camera module is mounted, it is possible to miniaturize the mobile terminal. In addition, by providing the first lens 111 having the first effective diameter A1 of a large area, it is possible to secure a high magnification zoom or a brighter aperture.

6 is a perspective view illustrating a first cylinder of the first lens holder 110 of the camera module of FIGS. 1 to 5 , and FIG. 7 is a second cylinder of the first lens holder of the camera module of FIGS. 1 to 5 . 8 is a perspective view showing a state in which the first cylinder and the second cylinder of FIGS. 6 and 7 are combined, and FIG. 9 is a perspective view of the first lens holder of the camera module according to an embodiment of the present invention. , FIG. 10 is a side cross-sectional view of the first lens holder of FIG. 9, and is an operation state diagram of the first lens holder

6 to 10, the first lens holder of the camera module includes a first cylinder 10, a second cylinder 20 rotatably coupled to the first cylinder 10, and the first cylinder ( In the first area of 10 ), a holding part 30 for maintaining a gap between the first cylinder 10 and the second cylinder 20 , and the first cylinder 10 in the second area of the first cylinder 10 . ) and a guide portion 40 for guiding the movement of the second cylinder 20 so that the relative position of the second cylinder 20 with respect to the change.

The first cylinder 10 and the second cylinder 20 are manufactured in a hollow cylindrical shape using a material such as synthetic resin or metal. The second cylinder 20 performs, for example, a function of supporting the first and second lenses 111 and 112 of FIG. 2 . The second cylinder 20 is rotatably coupled to the first cylinder 10 , and as the second cylinder 20 rotates with respect to the first cylinder 10 , the first cylinder 10 of the second cylinder 20 is ) can be adjusted.

The second cylinder 20 is rotatably coupled to the inner wall surface 18 of the first cylinder 10 . The holding part 30 is installed between the first cylinder 10 and the second cylinder 20 , and when the second cylinder 20 rotates relative to the first cylinder 10 , the first cylinder 10 ) and the function of maintaining the gap between the second cylinder (20). The first cylinder 10 has a jaw portion 15 protruding inward from the inner wall surface 18 and extending in the circumferential direction to support the end face 25 of the second cylinder 20 .

The holding part 30 includes a holding groove 31 extending along the circumferential direction on the inner wall surface 18 of the first cylinder 10 and the outside of the second cylinder 20 to be inserted into the holding groove 31 . A retaining protrusion 32 protruding from the wall surface 28 is provided. A plurality of the retaining grooves 31 are installed to be spaced apart from each other along the circumferential direction of the first cylinder 10 . Therefore, when the second cylinder 20 is coupled to the first cylinder 10 , the holding protrusion 32 is inserted into any one of the plurality of holding grooves 31 .

An insertion groove 17 is formed in the inner wall surface 18 of the first cylinder 10 . The insertion groove 17 is formed to extend along the axial direction of the first cylinder 10 to guide the movement of the holding protrusion 32 when the second cylinder 20 is coupled to the first cylinder 10 . One end of the holding groove 31 is connected to the insertion groove 17 .

Hereinafter, the region of the holding groove 31 of the first cylinder 10 into which the holding protrusion 32 of the second cylinder 20 is inserted is referred to as a first region. When the second cylinder 20 rotates relative to the first cylinder 10, in the first region, the holding protrusion 32 moves along the holding groove 31 while being inserted into the holding groove 31, In the first region, a gap between the first cylinder 10 and the second cylinder 20 may be maintained.

The guide part 40 is installed between the first cylinder 10 and the second cylinder 20 so that when the second cylinder 20 rotates relative to the first cylinder 10 , the second cylinder 20 . It functions to guide the movement of the second cylinder 20 so that the position relative to the first cylinder 10 is changed.

The guide portion 40 is a guide projection 41 protruding from the inner wall surface 18 of the first cylinder 10, and the guide projection 41 at the outer wall surface 28 of the second cylinder 20 to engage with. It is provided with an inclined groove (42) extending to form an inclination.

The guide protrusion 41 is spaced apart along the inner wall surface 18 of the first cylinder 10 and is arranged in plurality. Therefore, when the second cylinder 20 is coupled to the first cylinder 10 , the inclined groove 42 of the second cylinder 20 is coupled to any one of the plurality of guide protrusions 41 .

Referring to FIG. 7 , the axial direction of the second cylinder 20 is parallel to the Z axis and passes through the center of the second cylinder 20 . The inclined groove 42 is formed to be inclined with respect to the axial direction of the second cylinder 20 .

The second cylinder 20 has a receiving groove 29 extending along the outer wall surface 28 of the second cylinder 20 to accommodate the remaining guide protrusions 41 that are not coupled to the inclined grooves 42 . The extended length of the receiving groove 29 corresponds to the extended width of the inclined groove 42 . Therefore, as the second cylinder 20 rotates with respect to the first cylinder 10 , the remaining guide projections 41 can move along the receiving grooves 29 while the guide projections 41 move along the inclined grooves 42 . have.

Hereinafter, the region of the guide protrusion 41 of the first cylinder 10 inserted into the inclined groove 42 of the second cylinder 20 is referred to as a second region. When the second cylinder 20 rotates relative to the first cylinder 10, the guide protrusion 41 moves along the inclined groove 42, so that in the second area, the second cylinder 20 moves to the first cylinder ( 10) move away from it. That is, in the second region, the distance between the first cylinder 10 and the second cylinder 20 is increased, so that the position of the second cylinder 20 relative to the first cylinder 10 is changed.

The guide protrusion 41 is inclined to correspond to the inclined direction in which the inclined groove 42 is inclined. When the second cylinder 20 rotates with respect to the first cylinder 10 , the inclined groove 42 is guided by the guide protrusion 41 , so that in the second area, the second cylinder 20 moves from the first cylinder 10 . The movement of the second cylinder 20 may be guided to move away from it.

An introduction groove 27 is formed in the outer wall surface 28 of the second cylinder 20 having one end connected to the end of the inclined groove 42 and the other end being opened from the end surface 25 of the second cylinder 20 . do. The introduction groove 27 serves to guide the guide protrusion 41 to be inserted into the inclined groove 42 when the second cylinder 20 is coupled to the first cylinder 10 .

9 and 10 , a third cylinder 50 rotatably supporting the first cylinder 10 is disposed outside the first cylinder 10 . Between the first cylinder 10 and the third cylinder 50, an axial adjustment part 70 for changing the relative position of the first cylinder 10 with respect to the third cylinder 50 is further provided. The axial adjustment unit 70 changes the relative position of the first cylinder 10 with respect to the third cylinder 50 when the first cylinder 10 rotates relative to the third cylinder 50 . The third cylinder 50 and the axial direction adjustment unit 70 may be removed.

The axial adjustment part 70 includes an axial adjustment groove 16 extending and formed on the outer wall surface 19 of the first cylinder 10 to form an inclination with respect to the axial direction of the first cylinder 10, and the axial adjustment groove It has an axial adjustment protrusion 56 installed on the third cylinder 50 so as to be inserted into the 16 . When the first cylinder 10 rotates relative to the third cylinder 50 , the first cylinder 10 may move relative to the third cylinder 50 along the Z-axis direction of FIG. 9 . As described above, by changing the position of the first cylinder 10 in the Z-axis direction with respect to the third cylinder 50 , the position of the first lens 111 in the optical axis direction can be adjusted, so that fine focus adjustment is possible.

10 , the optical center (linear Lz1 ) of the lens coincides with the kinematic center, which is the center of the first cylinder 10 and the third cylinder 50 . When the second cylinder 20 is rotated with respect to the first cylinder 10 in this state, the second cylinder 20 and the first cylinder 10 are located in the first region where the holding protrusion 32 is inserted into the holding groove 31 . ) is kept constant.

However, in the second region where the inclined groove 42 and the guide protrusion 41 are coupled, as the second cylinder 20 rotates with respect to the first cylinder 10 , the second cylinder 20 becomes the first cylinder 10 . position changes to move away from it. As a result, as shown in FIG. 7 , the optical centers of the first and second lenses 111 and 112 may be inclined with respect to the kinematic centers of the first cylinder 10 and the third cylinder 50 . As such, by rotating the second cylinder 20 with respect to the first cylinder 10 , the degree of tilting of the first and second lenses 111 and 112 can be precisely adjusted.

The guide part 40 and the holding part 30 coupling the first cylinder 10 and the second cylinder 20, and the axial direction adjustment part 70 coupling the first cylinder 10 and the third cylinder 50 ) is manufactured within the range of fine mechanical tolerances. Accordingly, when the position of the first lens 111 is adjusted by rotating the second cylinder with respect to the first cylinder 10 and rotating the first cylinder 10 with respect to the third cylinder 50, the guide unit 40 With the action of the mechanical friction force in the holding portion 30 and the axial adjustment portion 70 , the adjustment device of the optical element can be maintained in an adjusted state.

Rotating the second cylinder 20 with respect to the first cylinder 10 or rotating the first cylinder 10 with respect to the third cylinder 50 may be performed automatically by the driving unit. For example, if a driving unit for applying a driving force to the second cylinder 20 is installed and a driving unit for applying a driving force to the first cylinder 10 is installed, an electric signal is applied to the driving unit to apply an electric signal to the first and second lenses 111 and 112 . can be adjusted automatically. For example, a motor driven by an electric signal can be used as a driving unit for driving the first cylinder 10 or the second cylinder 20, and the first cylinder 10 is engaged with the gear coupled to the shaft of the motor. And it is possible to install a gear surface on the surface of the second cylinder (20). However, the embodiment is not limited by this working method, and the rotational motion of the first cylinder 10 and the second cylinder 20 may be manually controlled by the driving unit.

In the above-described embodiments, the second cylinder is rotatably coupled to the inside of the first cylinder, but the embodiment is not limited to this configuration. That is, the second cylinder may be rotatably coupled to the outside of the first cylinder. In addition, the embodiment is not limited to the configuration of the axial adjustment unit that allows the first cylinder to move in the axial direction with respect to the third cylinder described in the above-described embodiments, and it may be modified. For example, an axial adjustment projection may be provided on the outer wall surface of the first cylinder, and an axial adjustment groove into which the axial adjustment projection is inserted may be provided on the inner wall surface of the third cylinder.

11(A) (B), the first lens holder 110 of the camera module 1000 is exposed outside the case 1A of the mobile terminal 1 such as a smart phone, and protrudes only during use. It may not protrude while not in use. Accordingly, in the non-use mode of the camera module 1000, it is possible to improve the problem that the first lens holder 110 protrudes to the outside of the smart phone, so that it is convenient to carry and the appearance design can be improved. It can also protect the surface of the camera module from damage.

The above detailed description should not be construed as restrictive in all respects and should be considered as exemplary. The scope of the embodiments should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the embodiments are included in the scope of the embodiments.

Claims (9)

housing;
a first lens holder including a first lens having a first effective diameter in an area of the housing;
a first reflection mirror for changing a path of light passing through the first lens holder; and
It includes an image sensor that converts the light passing through the first reflection mirror into an electrical signal,
The first effective mirror is larger than the width of the incident side of the first reflection mirror,
The first effective diameter is greater than a diagonal length of the image sensor,
The first lens holder is up or down in the first optical axis direction to adjust the focus, a camera module. According to claim 1,
The first lens holder includes a second lens having a second effective mirror between the first lens and the first reflection mirror,
and the second effective diameter is smaller than the first effective diameter. 3. The method of claim 2,
The second effective diameter is in a range of 80% to 95% of the first effective diameter, and is larger than a width of the incident side of the first reflecting mirror. 4. The method of claim 3,
and a second lens holder having at least one lens group between the first reflection mirror and the image sensor,
The second lens holder is moved toward the first reflection mirror or image sensor by the driving unit, the camera module. 5. The method according to any one of claims 1 to 4,
The first effective diameter is in the range of 10mm to 20mm, the camera module. 6. The method of claim 5,
The first lens is moved in the range of 1.8mm to 2.2mm in the optical axis direction, the camera module. 5. The method according to any one of claims 1 to 4,
Further comprising a second reflection mirror on the other side of the housing and the incident side of the image sensor,
The second reflection mirror reflects the light reflected by the first reflection mirror to the image sensor, the camera module. 5. The method according to any one of claims 1 to 4,
The first lens holder may include a first cylinder having a hollow cylindrical shape; a second cylinder supporting the first lens inside the first cylinder and having a hollow cylindrical shape and rotatably coupled; a holding part for maintaining a distance between the first cylinder and the second cylinder; and a guide part formed between the first cylinder and the second cylinder to guide the movement of the second cylinder so that a position relative to the first cylinder changes when the first cylinder rotates. The camera module according to any one of claims 1 to 4; and
The camera module includes a case of a mobile terminal installed on one side or the other side,
A first effective diameter of the first lens holder of the camera module is greater than a thickness of the mobile terminal.

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