KR101036365B1 - Camera module - Google Patents

Abstract

The present invention discloses a camera module. The camera module includes a camera unit unit; A shutter unit part disposed on the camera unit part, the shutter unit part including a shutter capable of exposing and blocking a lens of the camera unit and a shutter driver for driving the shutter; And a shield case having a dimple part facing a portion protruding upward from the shutter unit part and accommodating the camera unit part and the shutter unit part.

Camera Module, Shutter, Drive, Dimple, Shield Case

Description

Camera module {Camera module}

The present invention relates to a camera module, and more particularly, to a camera module including a shield case having a dimple portion facing a protruding portion of the shutter driver.

Recently, portable terminals such as mobile phones and PDAs have not only simple telephone functions but also various functions such as music listening, watching movies, watching TV and playing games.

In particular, the portable terminal may not only have a camera function of capturing video and images with a mobile phone as the camera module is built therein, but may also transmit videos and images stored in the mobile phone to the other party.

Today, while using a mega pixel image sensor in a camera module provided in a portable terminal, there is a need to add a shutter function that can provide high-quality image quality along with optical zoom and auto focus.

The shutter function may improve image quality by blocking unnecessary light provided to the lens at the moment the camera unit captures the image. For example, the shutter function may prevent a smear phenomenon occurring on the screen when photographing strong reflected light such as sunlight.

Here, the shutter unit for implementing the shutter function may be disposed on the top of the camera module. In this case, the shutter unit may include driving means for pivoting the shutter inside the camera module by the shutter and the driving force.

Meanwhile, when assembling the camera module inside the portable terminal, a sponge is provided between the case of the camera module and the exterior case of the portable terminal. The sponge is disposed along the edge of the top surface of the camera module.

Here, as the outer case of the portable terminal pressurizes the sponge and the camera module is assembled in the outer case, the separation gap between the case of the camera module and the outer case can be completely sealed. As a result, it is possible to prevent foreign substances from being introduced into the camera module.

However, the pressure applied to the sponge is applied to the case of the camera module, so that the case of the camera module can be bent downward. In this way, the case can be bent downward, and the parts disposed below the parts, in particular the shutter unit, can be pressed, which may cause a poor driving of the shutter unit.

Therefore, although the conventional camera module has various parts in keeping with the high pixel and the high functionalization, there is a problem of causing a driving failure by a sponge for preventing the introduction of foreign matter into the camera module.

Accordingly, the present invention has been made to solve a problem that may occur in a conventional camera module, and relates to a camera module including a shield case having a dimple portion corresponding to an upwardly protruding portion of the shutter driver.

The object of the present invention is to provide a camera module. The camera module comprises a camera unit unit; A shutter unit part disposed on the camera unit part, the shutter unit part including a shutter capable of exposing and blocking a lens of the camera unit and a shutter driver for driving the shutter; And a shield case having a dimple part facing a portion protruding upward from the shutter unit part and accommodating the camera unit part and the shutter unit part.

Here, the dimple portion may be continuously formed along the edge of the shield case.

In addition, the dimple may be partially formed along the edge of the shield case.

In addition, the shutter driver,

A coil housed inside the housing; A rotating body coupled with the magnetic facing the coil; A rotating shaft protruding upward from the rotating body; And an eccentric arm which protrudes upward and is inserted into a connection hole of the shutter and is connected to the rotating shaft to rotate the shutter according to the rotation of the rotating shaft.

In addition, a portion of the dimple portion may face the rotation axis and the eccentric arm.

The shutter unit may further include a hinge shaft for inserting a rotation hole formed at one end of the shutter, and a portion of the dimple portion may face the hinge shaft.

The apparatus may further include an aperture driving unit configured to drive an aperture disposed above or below the shutter and an aperture provided in the shutter unit, and the shield case may further include an additional dimple facing an upper portion of the aperture driving unit. It may further include wealth.

In addition, the dimple portion may have a concave shape protruding outward.

In addition, the camera unit unit,

An image sensor mounted on the substrate; A lens barrel disposed on the image sensor; And an actuator configured to receive the lens barrel and to drive the lens barrel to adjust the focus.

As the camera module of the present invention includes a shield case, the camera module may block electromagnetic waves of the camera module.

In addition, as the shield case has a dimple portion, it minimizes the height of the camera module, it is possible to prevent the drive failure of the parts of the camera module including the shutter unit portion due to the bending of the shield case.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings of the camera module. The following embodiments are provided by way of example so that those skilled in the art can fully understand the spirit of the present invention. Therefore, the present invention is not limited to the embodiments described below, but may be embodied in other forms. In the drawings, the size and thickness of the device may be exaggerated for convenience. Like numbers refer to like elements throughout.

1 is an exploded perspective view of a camera module according to a first embodiment of the present invention.

FIG. 2 is a partially assembled perspective view of the camera module shown in FIG. 1.

3 is a partial cross-sectional view of the camera module shown in FIG. 1.

4 is a perspective view of the shield case of FIG. 1.

1 to 4, the camera module according to the first embodiment of the present invention may include a camera unit unit 100, a shutter unit unit 200, and a shield case 300.

The camera unit unit 100 accommodates a substrate 101, an image sensor 102 mounted on the substrate 101, a lens barrel 104 disposed on the image sensor 102, and a lens barrel 104. It may include an actuator 105 for driving the barrel 104.

Specifically, the substrate 101 may include a pad for connecting to an electronic component including the image sensor 102 and a circuit layer for electrically connecting the pad and an external device to each other. The substrate 101 may be a printed circuit board or a ceramic substrate, but embodiments of the present invention are not limited thereto.

The image sensor 102 converts an optical signal from the outside into an electrical signal. The image sensor 102 may be mounted on the substrate 101 by being electrically connected to the pad. As a result, the electrical signal provided from the image sensor 102 is transmitted to the external device through the substrate 101, and the external device may display an image using the transferred electrical signal.

The image sensor 102 may be formed of a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

In addition, an image signal processor (ISP) for image signal processing may be further mounted on the substrate 101. Here, the ISP may be separated from the image sensor 102, but is not limited thereto. The ISP may be integrated in the image sensor 102.

Although not shown in the drawing, an active element such as a driver-IC and a passive element such as a resistor and a capacitor for driving the image sensor 102, the ISP, and the actuator 105 to be described later may be further mounted on the substrate 101. Can be.

The infrared blocking member 103 may be further provided on the image sensor 102. The infrared ray blocking member 103 blocks excessive infrared rays included in the light flowing into the image sensor 102. The infrared blocking member 103 may be made of an IR filter or an IR film.

The lens barrel 104 is a hollow cylinder-shaped lens accommodating portion accommodating at least one or more lenses L therein and having a through hole exposing the lens L. At this time, the light reflected from the external subject through the through hole is provided to the lens (L). The reflected light incident on the lens L passes through the lens L and is provided to the image sensor 102.

The actuator 105 may move the lens barrel 104 up and down by an electromagnetic force generated by the interaction of the magnetic field generated by the magnet and the electric field generated by the coil. Accordingly, the focal length between the lens L and the image sensor 102 in the lens barrel 104 can be varied. That is, the actuator 105 accommodates the lens barrel 104 and drives the lens barrel 104 up and down, whereby the camera module can automatically adjust the focus.

In addition, the actuator 105 may be applied to various driving methods such as auto focusing and optical zoom, in addition to a function of driving the lens barrel 104 up and down.

The shutter unit 200 is coupled on the camera unit 100. The shutter unit 200 serves to prevent unnecessary light from being provided to the lens L by exposing and shielding the lens L of the camera unit 100.

In detail, the shutter unit 200 may include a housing 210, a shutter 220, and a shutter driver 230.

The housing 210 accommodates the shutter driver 230 and is coupled to the camera unit 100, that is, the actuator 105. Here, the housing 210 includes a through hole 211 exposing the lens L of the camera unit unit 100. In addition, a hinge shaft 240 protruding upward may be disposed at an edge of the housing 210.

The shutters 220 have a symmetrical structure to each other, and may include first and second shutters 220a and 220b that are arranged crosswise. Rotating holes 222 disposed at one end of each of the first and second shutters 220a and 220b may be assembled to the hinge shaft 240. In addition, the shutter 220 may include a connection hole 221 assembled with the shutter driver 230. The connection hole 221 may be disposed around the rotation hole 222 and may have a length direction toward the through hole 211.

The shutter driver 230 includes a coil 231 accommodated inside the housing 210, a magnetic 232 facing the coil 231, a rotating body 233 coupled with the magnetic 232, and an upper side from the rotating body 233. Rotating shaft 234 protruding to the rotation shaft 234 and may include an eccentric arm 235 protruding upward.

The eccentric arm 235 may be rotated according to the rotation of the rotation shaft 234. Here, the rotation shaft 234 and the eccentric arm 235 may pass through the housing 210 and protrude outward. In this case, the eccentric arm 235 may be assembled to the connection hole 221 of the first and second shutters 220a and 220b intersected with each other.

The rotating body 233 including the rotating shaft 234 has a predetermined deflection force by the electromagnetic force formed by the coil 231 and the magnetic 232, such a deflection force is an eccentric arm (connected with the rotating shaft 234) 235 may be biased to one side or the other side. That is, the eccentric arm 235 may reciprocate along the connection hole 221 by the biasing force of the rotation shaft 234.

In this case, the first and second shutters 220a and 220b may rotate about the hinge shaft 240 according to the movement of the eccentric arm 235 to open and close the through hole 211 of the housing 210. That is, when the eccentric arm 235 moves through the through hole 211 from the outside, the other ends of the first and second shutters 220a and 220b overlap each other in the same direction, that is, through the through hole 211. By moving, the through hole 211 can be closed.

On the other hand, when the eccentric arm 235 moves outwardly from the through hole 211, the other ends of the first and second shutters 220a and 220b are different from each other, that is, toward the outside of the through hole 211. By moving to separate, the through hole 211 can be opened. Thus, the shutter 220 may prevent unnecessary light from being provided to the lens L through opening and closing of the through hole 211.

In an embodiment of the present invention, the shape of the shutter unit 200 is not limited, and the camera module according to an embodiment of the present invention may include various types of shutter unit.

In addition, although not shown in the drawings, the camera module according to the embodiment of the present invention may further include an aperture disposed on the shutter 220. The aperture may improve the image quality of the camera module by adjusting the amount of light provided to the lens L. FIG. In this case, the aperture driver 250 for driving the aperture may be further included in the shutter unit 200.

The aperture driver 250 may be disposed at the other side of the shutter driver 230. The aperture driving unit 250 includes an aperture coil accommodated in the housing 210, an aperture magnet facing the aperture coil, an aperture rotating body coupled to the aperture magnetic, an aperture rotating shaft 254 protruding upward from the aperture rotating body, and an aperture rotating shaft ( The diaphragm may include an eccentric eccentric arm 255 connected to the 254 and protruding upward and capable of turning according to the rotation of the diaphragm rotating shaft 254. Here, the aperture rotating shaft 255 and the aperture eccentric arm 254 may pass through the housing 210 of the shutter unit 200 and protrude outward.

The shield case 300 accommodates the camera unit unit 100 and the shutter unit unit 200. Here, the shield case 300 may include an opening 311 that exposes the lens L of the camera unit unit 100. For example, the position of the opening 311 may be a center portion of the shield case 300.

The shield case 300 may be made of a material capable of shielding electromagnetic waves generated from the camera unit unit 100. For example, the material of the shield case 300 may be metal.

When the camera module is assembled inside the portable terminal, the sponge 400 is disposed between the upper side of the camera module, that is, the upper side of the shield case 300 and the housing of the portable terminal. Here, the sponge 400 serves to prevent the introduction of foreign matter into the camera module. At this time, in order to effectively prevent the introduction of foreign substances, the housing of the portable terminal presses the sponge 400 and has a built-in camera module. In this case, the feeling of pressure applied to the sponge 400 may cause the shield case 300 to be bent, and the parts provided under the shield case 300, particularly the shutter unit 200, may be pressed due to the bending of the shield case 300. As a result, poor driving of the shutter unit 200 may be caused.

At this time, by increasing the depth of the shield case 300, to increase the assembly tolerance between the shutter unit 200 and the shield case 300, to reduce the interference to the shutter unit 200 due to the bending of the shield case 300 Can be. However, there may be a problem that the height of the camera module increases.

In order to improve this, the shield case 300 may include a dimple portion 312 in an area of the shutter driver 230 protruding upward, for example, an area facing the position area of the rotation shaft 234 and the eccentric arm 235. Can be. The dimple portion 312 may have a concave outward shape. That is, the shield case 300 and the shutter driver 230 protruding upward by the dimple part 312 may have a predetermined interval. As a result, although the shield case 300 is bent due to the load applied to the shield case 300, for example, the pressure of the sponge, the dimple portion 312 and the shutter unit 200 of the shield case 300 have a predetermined interval, It is possible to reduce the pressing of the part of the shutter unit 200 protruding from the shield case 300.

In addition, since the protruding portion of the shutter driver 230 may be disposed at the edge of the shutter unit 200, the dimple portion 312 may be continuously disposed along the edge of the shield case 300. In this case, the dimples 312 may be arranged in a line shape along the periphery of the opening 311. Accordingly, the dimple part 312 is disposed to face not only the shutter driver 230 but also a region other than the shutter driver 230, for example, a region of the aperture driver 250 and the hinge shaft 240. It is possible to prevent the driving failure of not only the driving unit 230 but also other components of the shutter unit 200.

Accordingly, the camera module according to the embodiment of the present invention may include a shield case having a recess portion corresponding to an upper portion of the shutter driver, and may prevent driving failure of the shutter unit while minimizing the height of the shield case. .

Hereinafter, a camera module according to a second embodiment of the present invention will be described with reference to FIG. 5. Since the second embodiment of the present invention has the same configuration as the camera module according to the first embodiment described above except for the shape of the dimple portion, only the shield case is shown for convenience of description, and the first embodiment Repeated descriptions will be omitted. In addition, the description of the camera module will be described with reference to FIG. 1.

5 is a perspective view of a shield case provided in the camera module according to the second embodiment of the present invention.

1 and 5, a camera module according to an embodiment of the present invention may include a shield case 300 accommodating a camera unit 100 and a shutter unit 200.

The shutter unit 200 may include a shutter 220 for adjusting the amount of light provided to the camera unit 100 and a shutter driver 230 for driving the shutter 220. In this case, a part of the shutter driver 230, for example, the rotation shaft 234 and the eccentric arm 235 may protrude upward, and may be disposed closer to the shield case 300 in comparison with other parts. Accordingly, when a load is applied to the shield case 300, the shield case 300 bends and presses a portion protruding upward from the shutter driver 230 to cause a driving failure of the shutter unit 200. There was this.

In order to improve this, the shield case 300 may include a dimple portion 312 facing the protruding portion of the shutter driver 230. In this case, the dimple 312 may be partially disposed along the edge of the shield case 300. That is, the dimple 312 may have a shape of a predetermined pattern.

Accordingly, since the dimple portion 312 is disposed only in a predetermined region of the shield case 300, the rigidity of the shield case 300 may be increased rather than being disposed in a line shape, and thus the shield case 300 may be bent. Can be reduced. As a result, the driving failure of the shutter driver 230 due to the bending of the shield case 300 can be further reduced.

Here, the shield case 300 may further include an additional dimple portion 313. The additional dimple part 313 protrudes upward among parts other than the shutter driver 230, for example, when the shutter unit part 200 includes the aperture driver 250, the additional dimple part 313 protrudes upward of the aperture driver 250. You can face the part. As a result, the shield case 300 may prevent the driving failure of not only the shutter driver 230 but also other components.

In addition, the shield case 300 may further include a dummy dimple part 314 spaced apart from the dimple part 312 to prevent the load from being concentrated on the dimple part 312.

In addition, the shield case 300 may include an opening 321 exposing the lens L of the camera unit unit 100.

Therefore, in the embodiment of the present invention, as the shield case includes a dimple having a predetermined pattern, the stiffness of the shield case may be increased and the driving failure of the shutter driver may be improved.

1 is an exploded perspective view of a camera module according to a first embodiment of the present invention.

FIG. 2 is a partially assembled perspective view of the camera module shown in FIG. 1.

3 is a partial cross-sectional view of the camera module shown in FIG. 1.

4 is a perspective view of the shield case of FIG. 1.

5 is a perspective view of a shield case provided in the camera module according to the second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: camera unit

200: shutter unit

300: shield case

311 opening

312: dimple

400: sponge

Claims (9)

A camera unit unit; A shutter unit part disposed on the camera unit part, the shutter unit part including a shutter capable of exposing and blocking a lens of the camera unit and a shutter driver for driving the shutter; And A shield case having a dimple portion facing a portion protruding upward of the shutter unit portion, and accommodating the camera unit portion and the shutter unit portion; Camera module comprising a. The method of claim 1, The dimple part of the camera module is continuously formed along the edge of the shield case. The method of claim 1, The dimple part of the camera module having a pattern on the upper surface of the shield case is disposed in the corner portion which is a constant area. The method of claim 1, The shutter driver A coil housed inside the housing; A rotating body coupled with the magnetic facing the coil; A rotating shaft protruding upward from the rotating body; And An eccentric arm which protrudes upward and is inserted into a connection hole of the shutter and is connected to the rotating shaft to rotate the shutter according to the rotation of the rotating shaft; Camera module comprising a. The method of claim 4, wherein A portion of the dimple portion is the camera module facing the rotation axis and the eccentric arm. The method of claim 1, The shutter unit further includes a hinge axis for inserting a rotary hole formed in one end of the shutter, A portion of the dimple portion is a camera module facing the hinge axis. The method of claim 1, Further comprising an aperture driving unit for driving the aperture provided in the upper or lower portion of the shutter and the aperture provided in the shutter unit unit, The shield case further includes an additional dimple portion facing the portion protruding upward of the aperture driver. The method of claim 1, The dimple part of the camera module having a convex shape protruding outward. The method of claim 1, The camera unit unit, An image sensor mounted on the substrate; A lens barrel disposed on the image sensor; And An actuator to receive the lens barrel and to drive the lens barrel to adjust focus; Camera module comprising a.

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