KR20090105588A - Camera module and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A camera module and a manufacturing method thereof is provided to reduce the error rate of resolution and improve the productivity. CONSTITUTION: A camera module includes a substrate, a housing, and a lens barrel. The substrate(110) has an image sensor(120). The housing(130) is installed on an upper part of the substrate. The lens barrel(140) is installed on an upper part of the housing. Pressure protrusions(141) pressure-inserted into an upper inner circumference of the housing are separated from each other along a lower outer circumference.

Description

Camera module and manufacturing method

The present invention relates to a camera module, and more particularly, to a camera module and a method for manufacturing the same, which can improve manufacturing defects by improving resolution defects.

Nowadays, portable terminals such as mobile phones and PDAs are being used as a multi-convergence with music, movies, TV, and games as well as simple telephone functions with the development of the technology. The camera module is the most representative. The camera module is being changed from the existing 300,000 pixels (VGA level) to the high pixel center of 7 million pixels and is being changed to implement various additional functions such as auto focusing (AF) and optical zoom (OPTICAL ZOOM).

In general, the camera module (CCM: COMPACT CAMERA MOUDULE) is compact and is applied to various IT devices such as a camera phone, a PDA, a smart phone, a portable mobile communication device, and a toy camera (TOY CAMERA). Increasingly, devices equipped with small camera modules are gradually being released to meet various consumer tastes.

Such a camera module is manufactured using an image sensor such as a CCD or a CMOS as a main component, and collects an image of an object through the image sensor and stores it as data in a memory in the device, and the stored data is stored in the LCD or PC in the device. The image is displayed through a display medium such as a monitor.

A typical camera module is typically produced by a method such as COB (CHIP ON BOARD), COF (CHIP ON FLEXIBLE), a brief description of the representative structure of the COB method with reference to the drawings shown below.

1 is a cross-sectional view schematically showing a camera module according to the prior art, Figure 2 is a schematic cross-sectional view showing an initial assembly state of the housing and the lens barrel of Figure 1, Figure 3 is the assembly of the housing and the lens barrel of Figure 1 It is sectional drawing which shows the state schematically.

As shown in FIG. 1, the camera module 10 according to the related art includes a printed circuit board 11 on which an image sensor 12 of a CCD or a CMOS is mounted by a wire bonding method, and of the printed circuit board 11. A lens housing 13 made of a plastic material coupled to a bonding method through an adhesive on an upper portion thereof, and a lens group L made of one or more lenses mounted thereon, assembled by screwing on an upper portion of the housing 13. It consists of a barrel 14.

Here, one row threaded portion 14a is formed on the lower outer circumferential surface of the lens barrel 14, and one row threaded groove 13a corresponding to the threaded portion 14a is formed on the upper inner circumferential surface of the housing 13.

That is, the lens barrel 14 is assembled to the housing 13 by screwing the thread 14a to the threaded groove 13a of the housing 13 while the lens group L is mounted therein. do.

The camera module 10 is inverted while the light flowing from the outside passes through the lens group L and is focused on the light receiving surface 12a of the image sensor 12. By rotating the lens barrel 14 fastened to the upper end of the housing 13 by screwing through the threaded portion 14a and the threaded groove 13a of the housing 13, the housing 13 and the housing 13 are located at the optimal focus point. An adhesive is injected between the clearances of the lens barrel 14 to adhesively fix the housing 13 and the lens barrel 14 to produce a final camera module product.

2 and 3, the lens barrel 14 is mounted inside the lens barrel 14 as the lens barrel 14 is rotated in the screw fastening direction of the screw thread 14a and the thread groove 13a. The image plane I formed by the light introduced into the housing 13 from the outside through the lens group L, and the light receiving surface II of the image sensor 12 mounted on the substrate 11 are matched. Optimum focus without any poor resolution at the point is achieved.

In this case, when the plane direction of the image plane I and the plane direction of the light receiving surface II of the image sensor 12 are inconsistent, there is a problem in that a poor resolution occurs.

That is, the conventional camera module, the assembly error when mounting the lens group (L) in the lens barrel 14, the injection error when injecting each lens of the lens group (L) and the housing 13 ), The surface direction of the image plane (I) formed through the lens group (L) due to the assembly error in the case of screwing the lens barrel 14 into the lens barrel does not form an accurate horizontal and the tilt occurs.

Further, the light receiving surface of the image sensor 12 due to an assembly error between the substrate 11 and the housing 13 and a mounting error when mounting the image sensor 12 on the substrate 11. ) 'S plane direction is also not accurate, and tilt occurs.

Therefore, when the lens barrel 14 is assembled to the housing 13 by screwing, the tilt direction of the image plane I formed through the lens group L and the light receiving surface of the image sensor 12 are provided. Only when the tilt directions in (II) coincide, the optimal focus can be achieved without poor resolution.

However, in the conventional camera module, since the thread 14a formed on the lower outer circumferential surface of the lens barrel 14 is a single line thread, the point of engagement with the threaded groove 13a formed in the housing 13 is always constant to one, and eventually It is determined by coincidence that the tilt direction of the image plane I and the tilt direction of the light receiving surface II of the image sensor 12 coincide.

Therefore, in the case where the tilt direction of the image plane I and the tilt direction of the light receiving surface II of the image sensor 12 are inconsistent, poor resolution may occur. In this case, the lens barrel 14 and the housing ( 13), there was no way to match this tilt direction mismatch.

As a result, in the conventional camera module, when the tilt direction of the image plane I formed through the lens group L and the tilt direction of the light receiving surface II of the image sensor 12 do not match, productivity decreases due to poor resolution. There was a problem.

Therefore, the present invention was devised to solve the above-mentioned disadvantages and problems raised in the manufacturing process of the conventional camera module, and an object of the present invention is to improve the poor quality of the camera to reduce the manufacturing cost and improve productivity It is to provide a module and a method of manufacturing the same.

According to one embodiment of the present invention for achieving the above object, a substrate on which an image sensor is mounted; A housing installed on an upper portion of the substrate; And a lens barrel installed at an upper portion of the housing, the lens barrel having a press-in protrusion formed on the lower outer circumferential surface of the housing and spaced apart from each other along the circumferential direction.

The indentation protrusion may be formed in a point contact or line contact with the upper inner peripheral surface of the housing.

In addition, the indentation protrusion may be formed in a shape that is in surface contact with the upper inner peripheral surface of the housing.

The camera module may further include a bond injection hole in which an adhesive is injected to bond the lens barrel to the housing.

At this time, it is preferable that the bond injection holes are formed in plural numbers spaced apart from each other along the circumferential direction of the housing.

On the other hand, according to another aspect of the present invention for achieving the above object, a substrate on which the image sensor is mounted, a housing provided on the upper portion of the substrate, and installed in the upper portion of the housing along the circumferential direction on the lower outer peripheral surface A method of manufacturing a camera module including a lens barrel having a lens barrel mounted therein, the press protrusions being indented on the upper inner circumferential surface of the housing and spaced apart from each other, the method comprising: installing the housing on an upper portion of the substrate; Assembling the lens barrel on an upper portion of the housing; Determining whether the tilt direction corresponds between an image surface formed by light incident into the housing through the lens and a light receiving surface of the image sensor; And adjusting the tilt of the lens barrel according to whether the tilt direction corresponds between the image surface formed by the light and the light receiving surface of the image sensor.

The installing of the housing on the upper portion of the substrate may include applying an adhesive to an upper surface of the substrate and assembling the housing on the upper surface of the substrate through the adhesive in a bonding manner.

The step of determining whether the tilt direction corresponds between the image surface formed by the light and the light receiving surface of the image sensor is such that the tilt direction of the image surface formed by the light coincides with the tilt direction of the light receiving surface of the image sensor. Determining whether or not.

The tilting of the lens barrel may be performed when the tilting direction of the image plane formed by the light does not match the tilting direction of the light receiving surface of the image sensor, and the tilting direction of the image plane formed by the light is changed. Independently adjusting the lens barrel to match the tilt direction of the light receiving surface of the image sensor.

On the other hand, according to another aspect of the present invention for achieving the above object, a lens barrel equipped with a lens therein; A housing installed below the lens barrel and having a press-fitting protrusion spaced apart from each other along the circumferential direction on the upper inner circumferential surface and pressed into the lower outer circumferential surface of the lens barrel; And a substrate installed under the housing and mounted with an image sensor.

Here, the indentation protrusion may be formed in a point contact or line contact with the lower outer peripheral surface of the lens barrel.

In addition, the indentation protrusion may be formed in a shape that is in surface contact with the lower outer peripheral surface of the lens barrel.

The camera module may further include a bond injection hole in which an adhesive is injected to bond the lens barrel to the housing.

At this time, it is preferable that the bond injection holes are formed in plural numbers spaced apart from each other along the circumferential direction of the housing.

On the other hand, according to another aspect of the present invention for achieving the above object, a lens barrel with a lens mounted therein, and installed in the lower portion of the lens barrel and spaced apart from each other along the circumferential direction on the upper inner peripheral surface of the lens barrel A method of manufacturing a camera module comprising a housing having a press-in protrusion formed on a bottom outer circumferential surface of a lower surface of the housing, and a substrate installed on the bottom of the housing and mounted on an image sensor, the method comprising: installing the housing on an upper portion of the substrate; Assembling the lens barrel to an upper portion of the housing; Determining whether the tilt direction corresponds between an image surface formed by light incident into the housing through the lens and a light receiving surface of the image sensor; And adjusting the tilt of the lens barrel according to whether the tilt direction corresponds between the image surface formed by the light and the light receiving surface of the image sensor.

As described above, according to the camera module and the manufacturing method thereof according to the embodiment of the present invention, there is an effect that can reduce the manufacturing cost by improving the poor resolution and improve the productivity.

Hereinafter, preferred embodiments of the camera module according to the present invention will be described in more detail with reference to the accompanying drawings.

4 is an exploded perspective view schematically illustrating a camera module according to a first embodiment of the present invention, FIG. 5 is a cross-sectional view illustrating a state in which the lens barrel and the housing of FIG. 4 are coupled, and FIG. 6 is a view of the lens barrel of FIG. 4. 7 is a perspective view schematically illustrating another embodiment, and FIG. 7 is an exploded perspective view schematically illustrating a camera module according to a second exemplary embodiment of the present invention, and FIG. 8 is a cross-sectional view illustrating a state in which the lens barrel and the housing of FIG. 7 are coupled to each other. .

First Example

First, the camera module according to the first embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5 as follows.

4 and 5, the camera module according to the first embodiment of the present invention includes a substrate 110 on which the image sensor 120 is mounted, and a housing installed on the substrate 110. 130 and an indentation protrusion 141 which is installed on an upper portion of the housing 130 and spaced apart from each other along a circumferential direction on the lower outer circumferential surface and is pressed into the upper inner circumferential surface of the housing 130, and includes one or more lenses therein. It is configured to include a lens barrel 140 mounted with a lens group (L).

Here, the indentation protrusion 141 formed in the lens barrel 140 may be formed in a point contact with the upper inner peripheral surface of the housing 130.

That is, the indentation protrusion 141 may be formed of a hemispherical protrusion protruding outward from the lower outer circumferential surface of the lens barrel 140.

At this time, as shown in Figure 6, the press-in projection 141 formed in the lens barrel 140 according to the first embodiment of the present invention may be formed in a shape that is in line contact with the upper inner peripheral surface of the housing 130. .

That is, the indentation protrusion 141 may protrude outward from the lower outer circumferential surface of the lens barrel 140, the cross section may have a hemispherical shape, and the vertical cross section may have a protrusion shape having a rectangular shape.

In addition, although not shown, the indentation protrusion 141 formed in the lens barrel 140 according to the first embodiment of the present invention may be formed in a shape that is in surface contact with the upper inner peripheral surface of the housing 130.

That is, the indentation protrusion may be formed as a protrusion protruding outward from the lower outer circumferential surface of the lens barrel to be in surface contact with the upper inner circumferential surface of the housing, and the protruding end surface may be formed as a convex curved surface corresponding to the upper inner circumferential surface of the housing. have.

On the other hand, the camera module according to the first embodiment of the present invention, when the lens barrel 140 is coupled to the housing 130 by a press-fit method, the bonding method of the housing 130 and the lens barrel 140 A bond injection hole 130a through which an adhesive is injected into the housing 130 may be further formed to fix the same.

In this case, it is preferable that the bond injection holes 130a are formed in plural numbers spaced apart from each other along the circumferential direction of the housing 130.

Next, the manufacturing method of the camera module according to the first embodiment of the present invention configured as described above will be described in more detail.

On the other hand, the manufacturing method of the camera module according to the first embodiment of the present invention, the step of installing the housing 130 on the upper portion of the substrate 110 on which the image sensor 120 is mounted, the upper portion of the housing 130 Assembling the lens barrel 140 in the press-fit method through the indentation projection, and the image surface formed by the light incident into the housing 130 through the lens group (L) mounted to the lens barrel 140 Determining whether the tilt direction corresponds between the light receiving surface II of the image sensor 120 and the tilting direction between the image surface formed by the light and the light receiving surface II of the image sensor 120. It comprises a step of adjusting the tilt of the lens barrel 140 according to whether or not.

In more detail, first, an adhesive is applied to an upper surface of the substrate 110 on which the image sensor 120 is mounted, and the housing 130 is bonded to the upper surface of the substrate 110 through the adhesive. Assemble

In addition, the lens barrel 140 is press-fitted into the housing 130 through a press-fit projection 141 formed in the lens barrel 140 by inserting a lower portion of the lens barrel 140 on the housing 130. Combine in a way.

Then, an image surface formed by inflow of light from the outside into the housing 130 through the lens group L built in the lens barrel 140 is formed on the light receiving surface II of the image sensor 120. The focusing is adjusted at the corresponding position.

In this case, it is determined whether the tilt direction of the image plane formed by the light coincides with the tilt direction of the light receiving surface II of the image sensor 120.

When the tilt direction of the image surface formed by the light does not match the tilt direction of the light receiving surface II of the image sensor 120, the tilt direction of the image surface formed by the light is the image sensor 120. The lens barrel 140 is independently adjusted to coincide with the tilt direction of the light receiving surface II.

That is, by inclining one side of the lens barrel 140 by pressing one side of the lens barrel 140, the light introduced into the housing 130 through the lens group L mounted on the lens barrel 140 is received. The tilt direction of the image plane to be formed coincides with the tilt direction of the light receiving surface II of the image sensor 120.

As a result, the tilt direction of the image plane formed by the light flowing through the lens group L and the tilt direction of the light receiving surface II of the image sensor 120 coincide with each other, so that optimal focusing of the camera module is achieved. In addition to the load, it is possible to prevent poor resolution at the same time.

Therefore, the camera module according to the first embodiment of the present invention can reduce the manufacturing cost of the camera module by preventing a poor resolution and improve the productivity.

2nd Example

Next, the camera module according to the second embodiment of the present invention will be described in detail with reference to FIGS. 6 and 7 as follows.

6 and 7, the camera module according to the second embodiment of the present invention includes a lens barrel 240 equipped with a lens group L including one or more lenses therein, and the lens barrel ( A housing 230 formed at a lower portion of the 240 and spaced apart from each other along the circumferential direction on the upper inner circumferential surface and having a pressing protrusion 231 press-fitted to the lower outer circumferential surface of the lens barrel 240, and a lower portion of the housing 230. It is configured to include a substrate 210 is installed and the image sensor 220 is mounted.

The indentation protrusion 231 formed on the housing 230 may be formed in a point contact with the lower outer circumferential surface of the lens barrel 240.

That is, the indentation protrusion 231 may be formed of a hemispherical protrusion protruding toward the center from the upper inner circumferential surface of the housing 230.

In addition, although not shown, the indentation protrusion 231 may be formed in a shape that is in surface contact with the lower outer peripheral surface of the lens barrel 240.

That is, the indentation protrusion may be formed as a protrusion protruding toward the center from the upper inner circumferential surface of the housing so as to be in surface contact with the lower outer circumferential surface of the lens barrel, and the protruding end surface may be formed as a concave curved surface corresponding to the lower outer circumferential surface of the lens barrel. Can be.

On the other hand, the camera module according to the second embodiment of the present invention, when the housing 230 and the lens barrel 240, the bonding method of the bonding of the housing 230 and the lens barrel 240 is fixed For this purpose, a bond injection hole 230a through which an adhesive is injected may be further formed in the housing 230.

In this case, the bond injection hole 230a is preferably formed in plurality in the circumferential direction of the housing 230 spaced apart from each other.

Next, the manufacturing method of the camera module according to the second embodiment of the present invention configured as described above will be described in more detail.

On the other hand, the manufacturing method of the camera module according to the second embodiment of the present invention, the step of installing the housing 230 on the upper portion of the substrate 210 on which the image sensor 220 is mounted, the upper portion of the housing 230 Assembling the lens barrel 240 in a press-fit method through the indentation projection 231, and the light incident into the housing 230 through the lens group (L) mounted to the lens barrel 240 is formed Determining whether the tilt direction corresponds between the image plane and the light-receiving surface II of the image sensor 220, and between the image plane formed by the light and the light-receiving surface II of the image sensor 220. And adjusting the tilt of the lens barrel 240 according to whether the tilt direction corresponds.

In more detail, first, an adhesive is applied to the upper surface of the substrate 210 on which the image sensor 220 is mounted, and the housing 230 is bonded to the upper surface of the substrate 210 through the adhesive. Assemble

The lens barrel 240 is press-fitted into the housing 230 through a press-fit projection 231 formed in the housing 230 by inserting a lower portion of the lens barrel 240 in the upper portion of the housing 230. To combine.

Then, an image surface formed by inflowing light into the housing 230 from the outside through the lens group L built in the lens barrel 240 is formed with the light receiving surface II of the image sensor 220. The focusing is adjusted at the corresponding position.

In this case, it is determined whether the tilt direction of the image plane formed by the light coincides with the tilt direction of the light receiving surface II of the image sensor 220.

When the tilt direction of the image surface formed by the light does not match the tilt direction of the light receiving surface II of the image sensor 220, the tilt direction of the image surface formed by the light is the image sensor 220. The lens barrel 240 is independently adjusted to coincide with the tilt direction of the light receiving surface II.

That is, by inclining one side of the lens barrel 240 by pressing one side of the lens barrel 240, the light introduced into the housing 230 through the lens group L mounted on the lens barrel 240 is received. The tilt direction of the image plane to be formed coincides with the tilt direction of the light receiving surface II of the image sensor 220.

As a result, the tilt direction of the image plane formed by the light flowing through the lens group L and the tilt direction of the light receiving surface II of the image sensor 220 coincide with each other so that optimal focusing of the camera module is achieved. In addition to the load, it is possible to prevent poor resolution at the same time.

Therefore, the camera module according to the second embodiment of the present invention can reduce the manufacturing cost of the camera module by preventing a poor resolution and improve the productivity.

Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and various substitutions, modifications, and changes within the scope without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It will be possible, but such substitutions, changes and the like should be regarded as belonging to the following claims.

1 is a cross-sectional view schematically showing a camera module according to the prior art.

2 is a cross-sectional view schematically showing the initial assembly state of the housing and the lens barrel of FIG.

3 is a cross-sectional view schematically showing a state of assembly of the housing and the lens barrel of FIG.

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

5 is a cross-sectional view showing a state in which the lens barrel and the housing of FIG. 4 are coupled;

FIG. 6 is a perspective view schematically showing another embodiment of the lens barrel of FIG. 4. FIG.

7 is an exploded perspective view schematically showing a camera module according to a second embodiment of the present invention.

8 is a cross-sectional view showing a state in which the lens barrel and the housing of FIG. 7 are coupled;

Explanation of symbols on the main parts of the drawings

110: substrate 120: image sensor

130 housing 130a bond injection hole

131: upper inner peripheral surface of the housing 140: lens barrel

141: indentation protrusion I: an image plane formed by light

Ⅱ: The light receiving surface of the image sensor

Claims (15)

A substrate on which the image sensor is mounted; A housing installed on an upper portion of the substrate; And A lens barrel installed at an upper portion of the housing and formed with a press-fitting protrusion spaced apart from each other along a circumferential direction on a lower outer circumferential surface thereof and pressed into the upper inner circumferential surface of the housing; Camera module comprising a. The method of claim 1, The press-fit projection is a camera module, characterized in that formed in the point contact or line contact with the upper inner peripheral surface of the housing. The method of claim 1, The press-fit projection is a camera module, characterized in that formed in a shape that is in surface contact with the upper inner peripheral surface of the housing. The method of claim 1, The housing module is characterized in that the bond injection hole is further formed to bond the adhesive for bonding with the lens barrel. The method of claim 4, wherein The bond injection hole is a camera module, characterized in that formed in a plurality of spaced apart from each other along the circumferential direction of the housing. A substrate on which the image sensor is mounted, a housing installed on the upper portion of the substrate, and a press-in protrusion formed on the upper portion of the housing and spaced apart from each other along the circumferential direction in the circumferential direction are pressed into the upper inner circumferential surface of the housing. In the manufacturing method of the camera module comprising a lens barrel mounted, Installing the housing on top of the substrate; Assembling the lens barrel on an upper portion of the housing; Determining whether the tilt direction corresponds between an image surface formed by light incident into the housing through the lens and a light receiving surface of the image sensor; And Adjusting the tilt of the lens barrel according to whether the tilt direction corresponds between the image surface formed by the light and the light receiving surface of the image sensor; Method of manufacturing a camera module comprising a. The method of claim 6, Installing the housing on the upper portion of the substrate, Applying an adhesive to the upper surface of the substrate, and assembling the housing to the upper surface of the substrate through the adhesive in a bonding manner. The method of claim 6, Determining whether the tilt direction corresponds between the image surface formed by the light and the light receiving surface of the image sensor, And determining whether the tilt direction of the image surface formed by the light coincides with the tilt direction of the light receiving surface of the image sensor. The method of claim 6, Adjusting the tilt of the lens barrel, The tilt direction of the image surface formed by the light is inconsistent with the tilt direction of the light receiving surface of the image sensor, and the tilt direction of the image surface formed by the light coincides with the tilt direction of the light receiving surface of the image sensor. Method of manufacturing a camera module, characterized in that the step of adjusting the lens barrel independently. A lens barrel with a lens mounted therein; A housing installed below the lens barrel and having a press-fitting protrusion spaced apart from each other along the circumferential direction on the upper inner circumferential surface and pressed into the lower outer circumferential surface of the lens barrel; And A substrate installed under the housing and on which an image sensor is mounted; Camera module comprising a. The method of claim 10, The press-fit projection is a camera module, characterized in that formed in the point contact or line contact with the lower outer peripheral surface of the lens barrel. The method of claim 10, The press-fit projection is a camera module, characterized in that formed in the shape that is in surface contact with the lower outer peripheral surface of the lens barrel. The method of claim 10, The housing module is characterized in that the bond injection hole is further formed to bond the adhesive for bonding with the lens barrel. The method of claim 13, The bond injection hole is a camera module, characterized in that formed in a plurality of spaced apart from each other along the circumferential direction of the housing. A lens barrel having a lens mounted therein, a housing formed at a lower portion of the lens barrel, and having a press-in protrusion formed on the upper inner circumferential surface of the lens barrel and spaced apart from each other in a circumferential direction and press-fitted to the lower outer circumferential surface of the lens barrel; In the manufacturing method of the camera module comprising a substrate on which the image sensor is mounted, Installing the housing on top of the substrate; Assembling the lens barrel on an upper portion of the housing; Determining whether the tilt direction corresponds between an image surface formed by light incident into the housing through the lens and a light receiving surface of the image sensor; And Adjusting the tilt of the lens barrel according to whether the tilt direction corresponds between the image surface formed by the light and the light receiving surface of the image sensor; Method of manufacturing a camera module comprising a.

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