U.S. patent application number 14/843744 was filed with the patent office on 2015-12-31 for camera lens module for mobile terminal.
The applicant listed for this patent is JA HWA ELECTRONICS CO., LTD.. Invention is credited to Il Gyu KANG, Hee Seung KIM, In Soo KIM.
Application Number | 20150378169 14/843744 |
Document ID | / |
Family ID | 51469257 |
Filed Date | 2015-12-31 |
United States Patent
Application |
20150378169 |
Kind Code |
A1 |
KIM; Hee Seung ; et
al. |
December 31, 2015 |
CAMERA LENS MODULE FOR MOBILE TERMINAL
Abstract
A camera lens module includes: an external case; an Automatic
Focusing (AF) driver disposed at one surface of the external case
to guide a lens carrier along an optical axis, the AF driver having
a magnet and a coil arranged to face each other in parallel to the
optical axis; and first and second OIS drivers located opposite the
AF driver with the lens carrier as the center, each of the first
and second OIS drivers having a coil and a magnet arranged to face
each other in parallel to the optical axis in a vertical or
horizontal direction to correct shaking of the lens carrier,
wherein each of the OIS drivers and the AF driver includes a
position sensor opposed to the magnet.
Inventors: |
KIM; Hee Seung; (Seoul,
KR) ; KIM; In Soo; (Seoul, KR) ; KANG; Il
Gyu; (Cheongju-si, KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
JA HWA ELECTRONICS CO., LTD. |
Cheongwon-gun |
|
KR |
|
|
Family ID: |
51469257 |
Appl. No.: |
14/843744 |
Filed: |
September 2, 2015 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/KR2014/001619 |
Feb 27, 2014 |
|
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|
14843744 |
|
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Current U.S.
Class: |
359/557 |
Current CPC
Class: |
G02B 13/001 20130101;
G03B 13/36 20130101; G02B 27/646 20130101 |
International
Class: |
G02B 27/64 20060101
G02B027/64; G03B 13/36 20060101 G03B013/36; G02B 13/00 20060101
G02B013/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 7, 2013 |
KR |
10-2013-0024600 |
Mar 29, 2013 |
KR |
10-2013-0034755 |
Claims
1. A camera lens module comprising: an external case; an Automatic
Focusing (AF) driver disposed at one surface of the external case
to guide a lens carrier along an optical axis, the AF driver having
a magnet and a coil arranged to face each other in parallel to the
optical axis; and first and second OIS drivers located opposite the
AF driver with the lens carrier as the center, each of the first
and second OIS drivers having a coil and a magnet arranged to face
each other in parallel to the optical axis in a vertical or
horizontal direction to correct shaking of the lens carrier,
wherein each of the OIS drivers and the AF driver includes a
position sensor opposed to the magnet.
2. The camera lens module of claim 1, wherein each of the position
sensors disposed at the OIS drivers and the AF driver is located at
an opening of the corresponding coil to face each magnet.
3. The camera lens module of claim 1, wherein the first and second
OIS drivers are located at first and second corner regions of the
camera lens module.
4. The camera lens module of claim 3, further comprising: an OIS
carrier which houses the lens carrier and is arranged inside the
external case, wherein the first OIS driver comprises: a first OIS
magnet mounted at an outer circumferential surface of the OIS
carrier and disposed to face the first corner region; and a first
OIS coil disposed at the first corner region and disposed to face
the first OIS magnet in a state separated from the first OIS
magnet, and wherein the second OIS driver comprises: a second OIS
magnet mounted at another outer circumferential surface of the OIS
carrier and disposed to face the second corner region; and a second
OIS coil disposed at the second corner region and disposed to face
the second OIS magnet in a state separated from the second OIS
magnet.
5. The camera lens module of claim 4, wherein the OIS carrier is
supported by an OIS base positioned at the bottom.
6. The camera lens module of claim 5, wherein the OIS base
comprises first and second upright portions which are respectively
provided at two corners to be housed in the first and second corner
regions and to support the first and second OIS coils,
respectively.
7. The camera lens module of claim 6, wherein the first position
sensor is disposed at the first upright portion, and the second
position sensor is disposed at the second upright portion.
8. The camera lens module of claim 7, wherein the first position
sensor is disposed on an inner surface or a rear surface of the
first OIS coil in the first corner region, and the second position
sensor is disposed on an inner surface or a rear surface of the
second OIS coil in the second corner region.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation-in-part of International
Application No. PCT/KR2014/001619, filed Feb. 27, 2014, which
claims priority to Korean Patent Application Nos. 10-2013-0024600
and 10-2013-0034755, filed Mar. 7, 2013 and Mar. 29, 2013,
respectively, the disclosure of which is incorporated by reference
in its entirety for all purposes.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The present invention relates to a portable terminal, and
more particularly to a device for driving a camera lens module in a
portable terminal, which is advantageous for miniaturization
thereof.
[0004] 2. Description of the Related Art
[0005] Recently, with the development of mobile communication
technologies, a popularized portable terminal such as a smart phone
has employed at least one camera lens module which is miniaturized
and light therein.
[0006] Particularly, with respect to a camera lens module employed
in the portable terminal, users have required a high capacitance
and performance camera lens module. Accordingly, a camera lens
module has been developed which corresponds to a class of Digital
Single Lens Reflex (DSLR) camera. Furthermore, it has become a
trend that the camera lens module is developed toward an
advantageous direction for miniaturization and lightening with the
maintenance of a high performance and a high capacity.
[0007] The camera lens module employed to the portable terminal has
an Auto-Focusing (AF) function, a zoom-in and zoom-out function,
and so on, and also has a stabilizer of compensating for a hand
shaking, which makes a camera perform its functions. The camera
lens module generally includes a lens system, a lens driving unit
for enabling the lens system to move along a direction of an
optical axis and making the lens system perform focusing, and an
image sensor for picking up light incident through the lens system
and converting the light into image signals.
[0008] Examples of the conventional camera lens module mounted on
the portable terminal are disclosed in Korean Patent Application
Nos. 2010-0106811 and 2009-0083613.
[0009] However, since there is a trend that the portable terminal
is gradually miniaturized with the maintenance of the high quality,
a camera lens module mounted on the portable terminal also is
required to be miniaturized with the maintenance of the high
performance.
SUMMARY OF THE INVENTION
[0010] The present invention has been made to solve the above
mentioned problems in the prior art, and an aspect of the present
invention is to provide a device for driving a camera lens module
of a portable terminal.
[0011] Further, another aspect of the present invention is to
provide a device for driving a camera lens module of a portable
terminal, in which Optical Image Stabilizer (OIS) driving units are
disposed in empty spaces at both corners of an external case to
face a lens and which contributes to miniaturization of the camera
lens module.
[0012] In accordance with an aspect of the present invention, a
camera lens module includes: an external case; an Automatic
Focusing (AF) driver disposed at one surface of the external case
to guide a lens carrier along an optical axis, the AF driver having
a magnet and a coil arranged to face each other in parallel to the
optical axis; and first and second OIS drivers located opposite the
AF driver with the lens carrier as the center, each of the first
and second OIS drivers having a coil and a magnet arranged to face
each other in parallel to the optical axis in a vertical or
horizontal direction to correct shaking of the lens carrier,
wherein each of the OIS drivers and the AF driver includes a
position sensor opposed to the magnet.
BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The above and other aspects, features, and advantages of the
present disclosure will be more apparent from the following
detailed description taken in conjunction with the accompanying
drawings, in which:
[0014] FIG. 1 is a perspective view illustrating an appearance of a
camera lens module employing a driving device according to a first
embodiment of the present invention;
[0015] FIGS. 2A and 2B are exploded perspective views illustrating
a structure of the camera lens module employing the driving device
according to the first embodiment of the present invention, in,
which elements of the camera lens module are sequentially arranged
along an optical axis;
[0016] FIGS. 3A and 3B are exploded perspective views illustrating
a structure of the camera lens module employing the driving device
according to the first embodiment of the present invention, in
which elements of the camera lens module are sequentially arranged
along an optical axis;
[0017] FIG. 4 is a perspective view illustrating the camera lens
module employing the driving device according to the first
embodiment of the present invention, in which the camera lens
module is cut in a diagonal direction;
[0018] FIG. 5 is a perspective view illustrating the camera lens
module employing the driving device according to the first
embodiment of the present invention, in which the camera lens
module is cut in a longitudinal direction;
[0019] FIG. 6 is a perspective view illustrating the camera lens
module employing the driving device according to the first
embodiment of the present invention, in which the camera lens
module is cut in a cross direction;
[0020] FIG. 7 is a cross sectional view illustrating the structure
of the driving device according to the first embodiment of the
present invention;
[0021] FIG. 8 is a longitudinally sectional view illustrating a
structure of a driving device according to a second embodiment of
the present invention;
[0022] FIG. 9 is a longitudinally sectional view illustrating a
structure of a driving device according to a third embodiment of
the present invention;
[0023] FIG. 10A is a view illustrating a magnetized structure of
first and second OIS magnets according to the first embodiment of
the present invention;
[0024] FIGS. 10B and 10C are views illustrating directions of force
applied to the camera lens module according to the magnetized
structure of the first and second OIS magnets;
[0025] FIG. 11A is a view illustrating the magnetized structure of
the first and second OIS magnets according to the first embodiment
of the present invention; and
[0026] FIGS. 11B and 11C are views illustrating directions of force
applied to the camera lens module according to the magnetized
structure of the first and second OIS magnets.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0027] The following description with reference to the accompanying
drawings is provided to help a whole understanding of embodiments
of the present invention as defined by the claims and the
equivalents of the claims. Although the description includes
various specific details to help the understanding of the
embodiment of the present invention, the details will be merely
regarded as examples. Therefore, it will be understood by a person
skilled in the art that variations and modifications of the
embodiments described in the disclosure can be achieved without
departing from the scope and spirit of the present invention.
Further, the description of well-known functions and structures
will be omitted for definition and simplicity.
[0028] Hereinafter, a structure of a camera lens module 10
according to the present invention will be described with reference
to the accompanying drawings.
[0029] FIG. 1 is a perspective view illustrating an appearance of
the camera lens module 10 according to the present invention. In
FIG. 1, since only the appearance of the camera lens module 10 is
shown, an external case 11 and 19 of the camera lens module 10,
first and second circuit boards and an upper end of a lens barrel
13 are only shown. The camera lens module 10 is employed to the
portable terminal. The portable terminal on which the camera lens
module 10 according to the present invention is mounted is merely a
general term, and the present invention may be applied to any one
of a mobile phone, a palm sized Personal Computer (PC), a Personal
Communication System (PCS), a Personal Digital Assistant (PDA), a
Hand-held PC (HPC), a smart phone, a wireless Local Area Network
(LAN) terminal, a laptop computer, a netbook, a tablet PC and the
like. Therefore, a term "portable terminal" should not be used to
limit that the present invention is applied to a specific type
device.
[0030] In FIGS. 1 to 7, a three-dimensional coordinate of X, Y and
Z is shown in which an axis of Z is a longitudinal direction of the
camera lens module 10 and means an optical axis along which a lens
barrel 13 moves, an axis of X means a horizontal direction (a
direction which is at right angles with the optical axis) of the
camera lens module 10, and an axis of Y means a vertical direction
(a direction which is at right angles with the optical axis and the
axis of X) of the camera lens module 10. An Automatic Focusing (AF)
unit described later provides a lens carrier 14 (see FIGS. 2 and 3)
with a force so that the lens carrier 14 moves along the optical
axis, and an Optical Image Stabilizer (OIS) driving unit provides
an OIS carrier 15 (see FIGS. 2 and 3) with a force so that the OIS
carrier 15 compensates a horizontal balance in directions of X and
Y around the optical axis.
[0031] A device for driving the camera lens module 10 (hereinafter,
referred to as a "module") according to the present invention will
be described in detail with reference to FIGS. 2 to 7. It is noted
that the module 10 described below is miniaturized by defining a
mounting space for driving units (first and second OIS driving
units described later) which significantly occupy an internal
mounting space in the module, to two corners among corner regions
111, 112, 113 and 114. Generally, the lens barrel 13 has a
cylindrical shape, and the external case 11 and 19 has a polyhedral
shape, particularly, a rectangular parallelepiped shape or a
regular hexahedron shape. If the lens barrel 13 is received in the
external case 11 and 19, the external case 11 and 19 has empty
spaces at four corner regions 111, 112, 113 and 114 in which the
driving units are arranged. Accordingly, the miniaturization of the
camera lens module 10 can be achieved. In the present invention, a
pair of OIS driving units is disposed at two corner regions, i.e.
first and second corner regions 111 and 112, among four empty
spaces. Hereinafter, an embodiment of the module which is
miniaturized will be described.
[0032] The module 10 has the external appearance which is a
schematically rectangular parallelepiped shape, and includes a lens
system, a guide unit, the AF driving unit, first and second OIS
driving units and at least one circuit board, which are received in
an internal receiving space defined by the external case 11 and
19.
[0033] The external case 11 and 19 has a polyhedral shape,
particularly a roughly rectangular parallelepiped shape, in which
upper and lower surfaces have a regular tetragon shape and four
lateral surfaces have an approximately rectangular shape. The
external case 11 and 19 functions as a housing which receives other
parts and protects the received parts from an exterior. Two circuit
boards 18 and 19 extend from the external case 11 and 19 to be in
electrical contact with an external electric power source (not
shown). One circuit board 18 extends from an OIS circuit board, and
the other circuit board 19 is an image sensor circuit board. The
OIS circuit board 18 and the image sensor circuit board 19 have
connection terminals 180 and 190 at end portions thereof,
respectively.
[0034] The external case includes an upper case 11 and the image
sensor circuit board 19 which are combined with each other, and has
the four corner regions 111, 112, 113 and 114.
[0035] According to the embodiment of the present invention, there
is no necessity of limiting the external case 11 and 19 to the
rectangular parallelepiped shape. The external case 11 and 19 may
be configured to have the regular hexahedral shape and also may
have a polyhedral shape with a pentagonal or hexagonal
cross-section.
[0036] The lens system includes the lens barrel 13 having a lens
(not shown) and the lens carrier 14 which is received in the lens
barrel 13 and moves together with the lens barrel 13 along the
optical axis. The lens barrel 13 has a cylinder shape, and is moved
along the optical axis by means of the AF driving unit in a state
of being fully received in the lens carrier 14, so as to focus the
lens. The lens carrier 14 fully receives the lens barrel 13
therein, and has a magnet mounting groove of a rectangular shape on
an outer peripheral surface thereof. The lens carrier 14 is guided
by means of a pair of guide devices along the optical axis. The
pair of guide devices includes well-known guide units g1 and g2,
and ball bearings b1 and b2. The lens barrel 13 may be detachably
coupled to the lens carrier, or constituted of a one-piece
structure.
[0037] The device for driving the module 10 according to the
present invention includes at least one AF driving unit and at
least one OIS driving unit. In the present invention, a single AF
driving unit is described as an example of the AF driving unit.
Further, at least two OIS driving units are arranged on a surface
opposite to that at which the AF driving unit is positioned, and
spaced apart from each other around the optical axis. In the
present invention, although it is described as an example that the
OIS driving unit includes first and second OIS driving units which
are disposed at first and second corner regions respectively, the
disposed positions of the first and second OIS driving units are
not limited to the corner regions, and may be changed if the first
and second OIS driving units can be disposed in empty spaces in the
module.
[0038] Firstly, a structure of the OIS driving unit will be
described. The OIS driving units are disposed in at least two
corner regions among the corner regions in the external case,
respectively, and compensate for a hand shaking of the OIS
carrier.
[0039] Hereinafter, the first and second OIS driving units which
are disposed in the first and second corner regions will be
described as an example. The first and second OIS driving units are
arranged at both corners, i.e. the first and second corner regions,
on a surface opposite to that on which the AF driving unit is
disposed, around the optical axis. In other words, the first and
second OIS driving units are disposed in the first and second
corner regions 111 and 112 respectively to be opposite to each
other, and compensate a balance of the OIS carrier 15 along the
optical axis using a resultant of electromagnetic forces generated
thereby. The first and second OIS driving units are symmetrically
disposed in the first and second corner regions 111 and 112 around
the lens barrel 13 respectively, so as to face to a center of the
lens barrel 13.
[0040] The first OIS driving unit includes a first OIS magnet m2
which is mounted on an outer peripheral surface of the OIS carrier
15 and faces to the first corner region 111, a first OIS coil c2
which is disposed in the first corner region 111 and is spaced
apart from and faces to the first OIS magnet m2, and a first
positioning sensor h2 which is disposed behind a back surface of
the first OIS coil c2 in the first corner region 111. It may be
assumed that the first corner region 111 approximately has a
polyhedral shape with a cross section of a triangle shape. As
electric current is applied to the first OIS coil c2, the first OIS
magnet m2 and the first OIS coil c2 generate electromagnetic force.
The first positioning sensor h2 includes a hall sensor.
[0041] The second OIS driving unit includes a second OIS magnet m3
which is mounted on an outer peripheral surface of the OIS carrier
15 and faces to the second corner region 112, a second OIS coil c3
which is disposed in the second corner region 112 and is spaced
apart from while facing to the second OIS magnet m3, and a second
positioning sensor h3 which is disposed behind a back surface of
the second OIS coil c3 in the second corner region 112. It may be
assumed that the second corner region 112 approximately has a
polyhedral shape with a cross section of a triangle shape. As
electric current is applied to the second OIS coil c3, the second
OIS magnet m3 and the second OIS coil c3 generate electromagnetic
force. The second positioning sensor h3 includes a hall sensor.
[0042] Accordingly, the OIS carrier 15 can be compensated for a
balance around axes of X and Y by means of a resultant of forces
generated by the first and second OIS magnets m2 and m3 and the
first and second OIS coils c2 and c3.
[0043] The first hall sensor h2 is disposed at an outermost of the
first corner regions 111, and directly faces to the first OIS
magnet m2 through a first opening in the first OIS coil c2.
Further, the second hall sensor h3 is disposed at an outermost of
the second corner regions 112, and directly faces to the second OIS
magnet m3 through a second opening in the second OIS coil c3.
[0044] The OIS carrier 15 is supported by the OIS base 16
positioned at the bottom. The OIS carrier has four corners in an
upper end portion and at each corner thereof, a cutout portion is
provided to pass through each suspension wire to be described
later. That is, the OIS carrier 15 is positioned to maintain a
levitation state somewhat separated from the OIS base by the
suspension wire on the OIS base 16 positioned at the bottom.
[0045] The OIS base 16 is formed in a plate-shaped square and has
four corners, and first and second upright portions 160 and 162 are
provided at two corner regions, respectively to be housed in the
first and second corner regions 111 and 112, respectively. The
first and second upright portions 160 and 162 are formed in an
approximately triangular pillar shape and support the first and
second OIS coils c2 and c3 and the first and second hall sensors h2
and h3, respectively. The first and second upright portions 160 and
162 have third and four openings, respectively, and in the third
and four openings, the first and second hall sensors h2 and h3,
respectively, are housed and disposed. Further, the OIS base 16
close contacts with the sensor base 12 and is coupled to the sensor
base 12 in an optical axis direction, and the OIS base 16 and the
sensor base 12 are coupled by assembling a protrusion and a
groove/hole.
[0046] The AF driving unit is disposed between one surface of the
external case and an outer peripheral surface of the lens carrier
which faces to the one surface of the external case, and makes the
lens carrier move along the optical axis. The AF driving unit
includes an AF magnet m1 which is mounted on the outer peripheral
surface of the lens carrier 14 in parallel with the one surface of
the external case, an AF coil c1 which is disposed to face to the
AF magnet m1 disposed on the one surface of the external case, an
AF positioning sensor h1 which is disposed in an opening of the AF
coil c1, an AF driving IC which is disposed by the side of the AF
coil c1, and an AF yoke y which is disposed to face to and support
the AF coil c1. When electric current is applied to the AF coil c1,
an electromagnetic force generated between the AF coil c1 and the
AF magnet m1 makes the lens barrel 14 move along the optical axis
so that a focal distance of the lens (not shown) can be
automatically adjusted. The AF positioning sensor h1 includes a
hall sensor. That is, the AF driving unit according to the present
invention makes the lens carrier 14 move along the optical axis
independently from the OIS carrier 15 because the AF coil c1 or the
AF magnet m1 is exposed through the opening on the one surface OIS
carrier 15 to face to the one surface of the external case 11 and
19 while the AF coil c1 or the AF magnet m1 is mounted on the one
surface of the external case 11 and 19 to face to the AF coil c1 or
the AF magnet m1. Therefore, the module according to the present
invention is capable of performing an AF driving and an OIS driving
with a minimum size and a minimum driving force.
[0047] The AF driving unit includes an AF circuit board 17 disposed
at an upper end of the OIS carrier 15, and the first and second OIS
driving units include an OIS circuit board 18 disposed on a bottom
surface of the OIS base. The AF circuit board 17 and the OIS
circuit board 18 are flexible circuit boards. The AF circuit board
17 and the OIS circuit board 18 are disposed in parallel at an
upper end and a lower end of the OIS carrier 15 in a direction
perpendicular to the optical axis, and are opposed to each other.
Particularly, the AF circuit board 17 has a closed-loop shape and
is continuously extended along an upper end portion of the OIS
carrier 15. Further, the OIS flexible printed circuit board 18 has
a closed-loop shape and is continuously extended along a lower end
portion of the OIS carrier 15. Specifically, the OIS flexible
printed circuit board 18 is continuously extended along a bottom
surface of the OIS base 16.
[0048] The AF circuit board 17 and the OIS circuit board 18
generally have a regular tetragonal shape, and four corners,
respectively. The AF circuit board 17 and the OIS circuit board 18
have suspension wires as described later, which are fixed to the
four corners, respectively.
[0049] The AF flexible printed circuit board 17 is formed in a
shape continuously extended along an upper end portion of the OIS
carrier 15, and the OIS flexible printed circuit board 18 is formed
in a shape continuously extended along the OIS base 16 that
supports the OIS carrier 15 at the bottom. The AF flexible printed
circuit board 17 is formed in a shape further including a first
central opening 174 and an AF auxiliary flexible printed circuit
board 170 bent orthogonal downward to be disposed to face the AF
magnet m. In the AF auxiliary flexible printed circuit board 170,
an AF coil c1 and an AF sensor h1 are disposed.
[0050] The OIS flexible printed circuit board 18 is formed in a
shape further including a second central opening 184 and first and
second AF auxiliary flexible printed circuit boards 180 and 182
bent orthogonal upward to be disposed to face first and second OIS
magnets m2 and m3, respectively. In the first OIS auxiliary
flexible printed circuit board 180, a first OIS coil c2 and a first
OIS sensor h2 are disposed, and in the second OIS auxiliary
flexible printed circuit board 182, a first OIS coil c3 and a
second OIS sensor h3 are disposed. The first and second OIS
auxiliary flexible printed circuit boards 180 and 182 are supported
by the first and second upright portions 160 and 162, respectively
to be housed in the first and second corner regions 111 and 112,
respectively.
[0051] The first OIS auxiliary flexible printed circuit board 180
is bent by approximately 90.degree. while having the first OIS coil
c2 and the first OIS hall sensor h2 to be housed in the first
corner region 111 while being supported by the first upright
portion 160. Further, the second OIS auxiliary flexible printed
circuit board 182 is bent by approximately 90.degree. while having
the second OIS coil c3 and the second OIS hall sensor h3 to be
housed in the second corner region 112 while being supported by the
second upright 162.
[0052] The AF circuit board 17 and the OIS circuit board 18 are
electrically connected by means of at least one suspension wire w.
That is, the suspension wire w performs a function of electrically
connecting the AF flexible circuit board 17 with the OIS flexible
circuit board 18, and supports the AF flexible circuit board 17 and
the OIS flexible circuit board 18. Of course, the suspension wire w
is a conductor with elasticity and is a linear type. Four
suspension wires w are used, and are disposed to be upright at the
four corner regions respectively. Each suspension wire w extends
along the optical axis and has one end thereof fixed to the AF
flexible circuit board 17 and the other end, thereof fixed to the
OIS flexible circuit board 18. To do this, the AF flexible circuit
board 17 has soldering openings formed at the four corners thereof
respectively, and the OIS flexible circuit board 18 has soldering
openings formed at the four corners thereof respectively. Further,
the OIS carrier 15 has openings at the four corner regions on the
upper end thereof, through which the suspension wires w extend, and
the first and second upright portions 160 and 162 are configured to
receive two wires w respectively.
[0053] Preferably, two wires among the four suspension wires w are
installed to be upright in the first and second corner regions 111
and 112. Accordingly, the two suspension wires w face to the first
and second OIS coils c2 and c3 and the first and second OIS
positioning sensors h2 and h3, respectively. Additionally, in the
first and second corner regions 111 and 112, the two suspension
wires w are disposed at the outermost rather than the first and
second positioning sensors h2 and h3.
[0054] In FIG. 2, a reference numeral `20` indicates a spacer, a
reference numeral `21` denotes an IR filter, and a reference
character `S` refers to an image sensor.
[0055] On the other hand, the first OIS magnet m2 and the first OIS
coil, c2 which constitute the first OIS driving unit may be changed
in their arrangement positions, and the second OIS magnet m3 and
the second OIS coil c3 which constitute the second OIS driving unit
may be changed in their arrangement positions. In addition, it is
not limited that the first and second positioning sensors are
disposed in the openings of the first and second upright portions,
and it is possible that the first and second positioning sensors
are disposed near the coils on the OIS base.
[0056] In other words, the first OIS magnet m2 may be disposed in
the first corner region 111, and the first OIS coil c2 may be
positioned in the OIS carrier 15. Also, the first positioning
sensor h2 may be disposed and operated in the OIS carrier 15.
Additionally, the second OIS magnet m3 may be disposed in the
second corner region 112, and the second OIS coil c3 may be
positioned in the OIS carrier 15. Also, the second positioning
sensor h3 may be disposed an operated in the OIS carrier 15.
[0057] In the present invention, moreover, the four suspension
wires are employed in order to connect the AF flexible circuit
board with the OIS flexible circuit board. However, it is possible
to electrically connect the AF flexible circuit board with the OIS
flexible circuit board by using a separate flexible circuit board
instead of the suspension wires.
[0058] Further, the AF magnet and the AF coil which constitute the
AF driving unit of the module may be replaced with a piezoelectric
element.
[0059] FIG. 8 is a longitudinally sectional view illustrating a
structure of a driving device 30 according to a second embodiment
of the present invention. In the description of the driving device
30 according to the second embodiment of the present invention
shown in FIG. 8, with an AF driving unit and first and second OIS
driving units which constitute the driving device 30, the AF
driving unit has an identical structure to that of the AF driving
unit shown in FIG. 2, and the first and second OIS driving units
have an identical structure except that elements of the driving
units are disposed differently from those shown in FIG. 2.
Accordingly, since the first and second OIS driving units are
symmetrically disposed in the first and second corner regions, the
description of the second OIS driving unit will be omitted in order
to avoid duplicating a description, and only the structure, of the
first OIS driving unit 300 will be described.
[0060] The first OIS driving unit is disposed in the first corner
region in a direction perpendicular to the optical axis. That is,
the first and second OIS driving units shown in FIGS. 1 to 7 are
disposed in parallel with the optical axis. In other words, the
first and second OIS driving units are mounted to be upright along
the optical axis in the first and second corner regions. However,
the first OIS driving unit 300 according to the second embodiment
of the present invention is disposed in a direction perpendicular
to the optical axis. Particularly, the first OIS driving unit 300
includes an OIS base 34, a first OIS coil 31 disposed on the OIS
base 34 in the first corner region, and a first OIS magnet 32
disposed on the first OIS coil 31 in the first corner region. In
addition, although it is not shown in the drawings, the second OIS
driving unit includes a second OIS coil disposed on the OIS base in
the second corner region, and a second OIS magnet disposed on the
second OIS coil in the second corner region.
[0061] Further, the first OIS coil 31 and the first OIS magnet 32
are arranged in parallel with a plane perpendicular to the optical
axis while facing to each other, and the second OIS coil and the
second OIS magnet also are arranged in parallel with a plane
perpendicular to the optical axis while facing to each other. The
first OIS driving unit 300 includes a first OIS positioning sensor
33 disposed on the first OIS magnet 32. The second OIS driving unit
includes a second OIS positioning sensor disposed on the second OIS
magnet.
[0062] In this case, the first OIS magnet 32 is integrally
connected to the OIS carrier, and the first OIS positioning sensor
33 is disposed on the OIS base. The second OIS magnet is integrally
connected to the OIS carrier, and the second OIS is disposed on the
OIS base.
[0063] In result, the first OIS coil 31, the first OIS magnet 32
and the first OIS positioning sensor 33 are stacked up in a
direction of the optical axis in the first corner region, and are
disposed in parallel with one another while facing to one another.
Further, the second OIS coil, the second OIS magnet and the second
OIS positioning sensor are stacked up in a direction of the optical
axis in the second corner region, and are disposed in parallel with
one another while facing to one another.
[0064] On the other hand, in the driving device 30, the first OIS
coil and the first OIS magnet may be changed with each other in an
arrangement position.
[0065] FIG. 9 is a longitudinally sectional view illustrating a
structure of a driving device 40 according to a third embodiment of
the present invention. In the description of a driving device 40
according to the third embodiment of the present invention shown in
FIG. 9, an AF driving unit constituting the driving unit 40 has an
identical structure to that of the AF driving unit (shown in FIG.
2) in the first and second OIS driving units. With the coil, the
magnet and the positioning sensor constituting the first and second
OIS driving units, the arrangement of the magnet and the coil is
identical to that of the first embodiment, and the arrangement of
only the positioning sensor is different from that in the first
embodiment. Therefore, only the first positioning sensor 43 of the
first and second OIS positioning sensors of the first and second
OIS driving units (disposed in the first corner region) will be
described in order to avoid duplicating a description, and the
description of the second OIS positioning sensor (disposed in the
second corner region) will be omitted because the second OIS
positioning sensor is symmetrically disposed against the first
positioning sensor 43. The first positioning sensor 43 is disposed
on the OIS base 44 in the first corner region. Furthermore, the
first positioning sensor 43 faces to a bottom surface of the first
OIS magnet 41. The second positioning sensor also is disposed on
the OIS base in the second corner region. In addition, the second
positioning sensor faces to a bottom surface of the second OIS
magnet.
[0066] As a result, in the driving device 40 according to the third
embodiment of the present invention, the OIS positioning sensor may
be disposed on the OIS base 44, particularly to face to a bottom
surface of the OIS magnet 41. The OIS base may be made of an
injection molding product or a metal plate. In a case of making the
OIS base of the metal plate, first and second upright portions of
the OIS base are made by a bending operation.
[0067] FIG. 10A is a view illustrating a magnetized structure of
the first and second OIS magnets according to the first embodiment
of the present invention, and FIGS. 10B and 10C are views
illustrating directions of forces applied to the camera lens module
according to the magnetized structure of the first and second OIS
magnets, respectively. Referring to FIGS. 10A to 10C, when the
first and second OIS magnets of the first OIS driving unit are
magnetized and driven, force is provided to the OIS carrier in a
direction of X or Y so as to compensate for a hand shaking of the
OIS carrier. Arrows denote the direction of the force.
[0068] FIG. 11A is a view illustrating a magnetized structure of
the first and second OIS magnets according to the first embodiment
of the present invention, and FIGS. 11B and 11C are views
illustrating the directions of forces applied to the camera lens
module according to the magnetized structure of the first and
second OIS magnets, respectively. Referring to FIGS. 11A to 11C,
when the first and second OIS magnets of the first OIS driving unit
are magnetized and driven, force is provided to the OIS carrier in
a direction of X or Y so as to compensate for a hand shaking of the
OIS carrier. Arrows denote the direction of the force.
[0069] The first and second OIS magnets shown in FIG. 10A have a
structure in that they are magnetized in pair, and the first and
second OIS magnets shown in FIG. 11A have a structure in that they
are magnetized in two pairs.
[0070] As described above, according to the present invention, the
first and second OIS driving units are disposed in an empty space
of the camera lens module, thereby miniaturizing the camera lens
module and the device for driving the camera lens module of the
portable terminal.
[0071] Further, according to the present invention, by disposing
first and second OIS drivers at empty space of a camera lens module
and by disposing two flexible printed circuit boards of a thin film
at each of an upper end portion and a lower end portion,
respectively, of an OIS carrier, and by connecting them using a
wire at a corner, a driving device of a camera lens module of a
portable terminal is formed in a small size and thus a camera lens
module is formed in a small size.
[0072] According to the present invention, furthermore, the lens
carrier is installed in the OIS carrier, on one surface of which an
opening is formed, and the AF driving unit for providing a driving
force to the lens carrier is disposed in the opening of the OIS
carrier, so that the lens carrier independently performs an AF
operation regardless of the OIS carrier. That is, in the present
invention, since the OIS carrier has a structure of partially
enclosing the AF driving unit, it is possible to provide the
miniaturized camera lens module. Further, since a driving force of
the AF driving unit is applied to only the lens carrier, the OIS
carrier and the AF driving unit can be operated by a minimum
driving force.
[0073] Although the present invention is shown and described with
reference to the specific embodiments, it will be understood by a
person skilled in the art that the details and forms of the present
invention may be modified in various forms without departing from
the spirit and the scope of the present invention as defined by the
attached claims and the equivalents thereof.
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