KR101310579B1 - Camera Module - Google Patents

Abstract

The present invention provides a guide provided on a substrate on which the image sensor is mounted; And an optical holder mounted inside the lens and vertically moved in a state supported by the guide, the optical holder being provided on the substrate after the focusing adjustment by the distance adjustment between the image sensor and the lens. do.
According to the present invention, it is possible to improve the assemblability of the camera module and to prevent deterioration of image quality due to a foreign material defect, to reduce the manufacturing cost of the camera module and to improve productivity.

Description

Camera module {Camera Module}

The present invention relates to a camera module, and more particularly, to a camera module which can prevent the degradation of image quality due to the improvement of assemblability and foreign matters, and can reduce the manufacturing cost and improve productivity.

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 300,000 pixels (VGA level) to a high pixel center of more than 10 million pixels at the same time, and is being changed to implement various additional functions such as auto focusing (AF) and optical zoom.

In general, a compact camera module (CCM) is a small size and is applied to various IT devices such as a camera phone, a PDA, a smart phone, and a portable mobile communication device. The market is gradually increasing the number of devices equipped with camera modules.

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.

FIG. 1 is an exploded perspective view of a conventional camera module. The conventional camera module 10 includes a printed circuit board 11 on which an image sensor 11a of a CCD or CMOS is mounted, and an upper portion of the printed circuit board 11. It comprises a housing 12 to be coupled, and a lens barrel 13 coupled to the upper portion of the housing 12 and mounted with a lens (L) therein.

Here, the housing 12 is coupled to the printed circuit board 11 by a bonding method using an adhesive.

In addition, a male screw portion 13a is formed on an outer circumferential surface of the lens barrel 13, and a female screw portion 12a is formed on an inner circumferential surface of the housing 12, and the male screw portion 13a and the female screw Q portion 12a are formed. Are mutually coupled by screw fastening.

Meanwhile, an IR filter (not shown) may be mounted inside the housing 12 to block infrared rays having excessive long wavelengths flowing into the image sensor 11a.

The camera module assembled as described above is focused on the surface of the image sensor 11a by inverting an image while light flowing from a specific object passes through the lens L, wherein the housing 12 is coupled by screwing. While rotating the lens barrel 13 fastened to the upper portion, the adhesive is injected into the gap between the housing 12 and the lens barrel 13 at the optimal focusing point to bond and fix the housing 12 and the lens barrel 13. The final camera module product is produced.

As described above, in the conventional camera module assembly method, the lens barrel 13 is inserted through the upper opening of the housing 12 to be in close contact with the screw coupling using the female and male screw parts 12a and 13a formed on the inner and outer circumferential surfaces of each member. Coupled between the lens L in the lens barrel 13 and the image sensor 11a mounted on the printed circuit board 11 by height adjustment by rotation of the lens barrel 13 at the upper end of the housing 12. Focus adjustment is made.

Therefore, in the conventional camera module manufactured by the above-described assembly method, when the housing 12 and the lens barrel 13 are vertically coupled, when the female and male screw parts 12a and 13a are engaged at the wrong angle, the screw thread may be crushed. There was a problem such as a foreign material defect due to the generation of fine particles while the engagement portion is worn by the friction of the female and male screw portions (12a, 13a).

In addition, the conventional camera module has a problem that the particles can be introduced into the light-receiving area of the image sensor 11a, causing deterioration in image quality when the image is reproduced through the image sensor 11a.

As the housing 12 and the lens barrel 13 are screwed together, when the lens barrel 13 is rotated along the contact surface of the spiral, a helix angle formed in the lens barrel 13 and an assembly tolerance are greatly generated. There is a problem in that the tilt (tilt) and thereby vignetting phenomenon occurs.

In addition, after the focusing operation, the camera module is moved to bond the housing 12 and the lens barrel 13. When the camera module is moved, poor focusing is caused by a change in the position of the lens barrel 13. There was a problem that occurred.

In addition, the conventional camera module, a screw mold for the processing of the female screw portion 12a and the male screw portion 13a for screwing the housing 12 and the lens barrel 13 should be further manufactured, the housing 12 requires a separate cavity-specific matching operation for maintaining torque when the lens barrel 13 is screwed, thereby lowering productivity and increasing manufacturing cost.

The present invention has been made to solve the above-described problems, the present invention can improve the assembly properties by improving the screw fastening structure of the existing housing and the lens barrel, can prevent high-quality foreign objects to implement a high-quality image and poor focusing To provide a camera module that can prevent the object.

Another object of the present invention is to provide a camera module that can reduce the manufacturing cost and improve productivity by adding a screw mold and additional adjustment work due to the screwing of the existing housing and the lens barrel.

In order to achieve the above object, the present invention includes: a guide provided on a substrate on which the image sensor is mounted; And an optical holder mounted inside the lens and vertically moved in a state supported by the guide, the optical holder being provided on the substrate after the focusing adjustment by the distance adjustment between the image sensor and the lens. do.

The guide may be formed to surround the image sensor.

An insertion hole may be formed on an upper surface of the substrate, and an insertion protrusion corresponding to the insertion hole may be formed in the guide.

The camera module may be configured such that the inner surface of the optical holder is in close contact with the outer surface of the guide, or the outer surface of the optical holder is in close contact with the inner surface of the guide.

Here, the optical holder may be fixed to the guide by laser or ultrasonic welding.

In this case, a fusion hole for the fusion may be formed in the optical holder or the guide.

The optical holder and the guide may be combined in an uneven structure.

Meanwhile, an opening may be formed on one side of the guide, a step groove may be formed on one side of the substrate on which the opening is disposed, and the optical holder may have a step protrusion coupled to the step groove. have.

As described above, according to the camera module according to the present invention,

The purpose of the present invention is to provide a camera module that can improve assembly performance by improving the screw fastening structure of the existing housing and the lens barrel, and to realize a high-quality image by preventing foreign material defects and to prevent poor focusing.

Another object of the present invention is to provide a camera module that can reduce the manufacturing cost and improve productivity by adding a screw mold and additional adjustment work due to the screwing of the existing housing and the lens barrel.

1 is an exploded perspective view schematically showing a conventional camera module.
Figure 2a is an exploded perspective view schematically showing a first embodiment of the camera module according to the present invention.
FIG. 2B is a cutaway perspective view of the camera module of FIG. 2A in a coupled state; FIG.
3A is an exploded perspective view schematically showing a second embodiment of a camera module according to the present invention.
3B is a cutaway perspective view of the camera module of FIG. 3A.
4A is an exploded perspective view schematically showing a third embodiment of a camera module according to the present invention.
FIG. 4B is an exploded perspective view showing an inverted configuration of the camera module of FIG. 4A.
5A is an exploded perspective view schematically showing a fourth embodiment of a camera module according to the present invention.
5B is a perspective view of the combination of FIG. 5A.
5C is a plan view illustrating a state in which an image sensor and a guide are provided on the substrate of FIG. 5A.
6A is an exploded perspective view schematically showing a fifth embodiment of a camera module according to the present invention.
6B is a cutaway perspective view illustrating a state in which the image sensor and the guide are provided on the substrate of FIG. 6B.
7A is an exploded perspective view schematically showing a sixth embodiment of a camera module according to the present invention.
7B is a perspective view of the combination of FIG. 7A.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention in which the object of the present invention can be specifically realized are described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted below.

First, a first embodiment of a camera module according to the present invention will be described in detail with reference to FIGS. 2A to 2B.

Figure 2a is an exploded perspective view schematically showing a first embodiment of the camera module according to the present invention, Figure 2b is a cutaway perspective view of the camera module of Figure 2a in a combined state.

2A and 2B, a first embodiment 100 of a camera module according to the present invention includes a substrate 110 on which an image sensor 111 is mounted and a guide provided on the substrate 110. 120 and at least one lens mounted therein, and an optical holder 130 provided on the substrate 110.

The guide 120 may be provided to surround the image sensor 111 on the upper surface of the substrate 110.

In this case, an insertion hole 110a may be formed at an edge portion of the substrate 110, and an insertion protrusion 120a inserted into the insertion hole 110a may be formed in the guide 120.

Accordingly, the guide 120 may be provided on the substrate 110 by inserting the insertion protrusion 120a into the insertion hole 110a.

In this case, the guide 120 may be fixed to the substrate 110 by a bonding method by an adhesive.

The optical holder 130 is vertically moved while being supported by the guide 120 and is provided on the substrate 110 while adjusting focusing by adjusting a distance between the image sensor 111 and the lens L. FIG. Can be.

The inner surface of the optical holder 130 may be in close contact with the outer surface of the guide 120.

That is, in this embodiment, the optical holder 130 may be vertically moved while its inner surface is held in close contact with and supported by the outer surface of the guide 120. Accordingly, only the vertical movement of the optical holder 130 is performed. A focusing operation may be performed by adjusting the distance between the image sensor 111 and the lens L. FIG.

Accordingly, it is possible to prevent the problems caused by the existing screw fastening structure, such as foreign matter defects due to the screwing of the lens barrel and the housing in the existing camera module, and to further improve the assembly of the camera module and to realize high quality images and to reduce the manufacturing cost and Productivity can be improved.

On the other hand, the optical holder 130 may be fixed to the guide 120 by applying a high-temperature energy, such as a laser or ultrasonic welding in the state that the focusing adjustment is completed.

Next, a second embodiment of the camera module according to the present invention will be described in detail with reference to FIGS. 3A to 3B.

3A is an exploded perspective view schematically illustrating a second embodiment of a camera module according to the present invention, and FIG. 3B is a cutaway perspective view of the camera module of FIG. 3A.

3A and 3B, a second embodiment 200 of a camera module according to the present invention includes a substrate 210 on which an image sensor 211 is mounted, similar to the camera module of the first embodiment, and the substrate. Comprising a guide 220 provided on the upper portion of the 210, and an optical holder 230 provided to surround the guide 220 on the upper portion of the substrate 210 and having at least one lens (L) Can be.

However, unlike the camera module of the first embodiment described above, the camera module 200 of the present embodiment has a different fixing structure between the optical holder 230 and the guide 120.

That is, the camera module 200 of the present embodiment has a fusion hole 231 on one side of the optical holder 230 in order to apply high heat energy to the optical holder 230 or to facilitate an operation such as ultrasonic welding. It is started to form.

For example, when the optical holder 230 is ultrasonically fused to the guide 120, the optical holder is provided by providing ultrasonic waves to the fusion hole 231 using a device such as a horn 240 that generates ultrasonic waves. 230 and the guide 120 may be fixed by ultrasonic welding.

On the other hand, since the configuration of the camera module 200 of the present embodiment except for the structure of the fusion hole 231 is the same as the first embodiment described above, a detailed description thereof will be omitted.

Next, a third embodiment of the camera module according to the present invention will be described in detail with reference to FIGS. 4A to 4B.

Figure 4a is an exploded perspective view schematically showing a third embodiment of the camera module according to the present invention, Figure 4b is an exploded perspective view showing the reverse configuration of the camera module of Figure 4a.

4A and 4B, a third embodiment 300 of a camera module according to the present invention includes a substrate 310 on which an image sensor 311 is mounted, similar to the camera module of the second embodiment, and the substrate. Comprising a guide 320 provided on the upper portion of the 310, and an optical holder 330 provided to surround the guide 320 on the substrate 310 and having at least one lens (L) Can be.

However, unlike the camera module of the second embodiment described above, the camera module 300 of the present embodiment has a different coupling structure between the optical holder 330 and the guide 320.

That is, the camera module 300 of the present embodiment additionally discloses combining the optical holder 330 and the guide 320 in an uneven structure.

For example, the concave-convex groove 325 is formed on one side of the guide 320, and the concave-convex protrusion 335 corresponding to the concave-convex groove 325 is formed on one side of the optical holder 330. The optical holder 330 may be vertically moved in a state where the protrusion 335 is inserted into the uneven groove 325. Accordingly, the optical holder 330 is adjusted when focusing is performed by vertical movement of the optical holder 330. ), It is possible to prevent the vignetting phenomenon by preventing the tilt.

On the other hand, since the camera module 300 of the present embodiment has a configuration other than the above-described concave-convex structure, the detailed description thereof will be omitted.

Next, a fourth embodiment of the camera module according to the present invention will be described in detail with reference to FIGS. 5A to 5C.

5A is an exploded perspective view schematically illustrating a fourth embodiment of a camera module according to the present invention, FIG. 5B is a combined perspective view of FIG. 5A, and FIG. 5C illustrates a state in which an image sensor and a guide are provided on a substrate of FIG. 5A. Top view.

5A to 5C, a fourth embodiment 400 of a camera module according to the present invention includes a substrate 410 on which an image sensor 411 is mounted, similarly to the camera module of the first embodiment, and the substrate. And an optical holder 430 having a guide 420 provided on an upper portion of the 410 and surrounding the guide 420 on an upper portion of the substrate 410 and having at least one lens L. Can be.

However, the camera module 400 of the present embodiment, unlike the camera module of the first embodiment described above, discloses that an opening 420a is formed in one side of the guide 420.

That is, in the camera module 400 of the present embodiment, when the distance between the upper surface of the substrate 410 and the image sensor 411 and the side surface of the substrate is short, that is, the optical holder 43 on the upper surface of the substrate 410. In the case where the portion on which) is mounted is small, an opening 420a may be formed on one side of the guide 420.

Here, when the opening 420a is formed on one side of the guide 420, the foreign matter introduced through the site where the optical holder 430 is seated on the upper surface of the substrate 410 is the opening 420a. It may be introduced into the image sensor 411 through.

In addition, the adhesive is applied to a portion of the upper surface of the substrate 410 on which the optical holder 430 is seated to fix the optical holder 430. In this case, the adhesive may flow into the image sensor 411. .

In order to prevent this, the camera module 400 of the present embodiment additionally forms a step groove 410a on one side of the substrate 410 on which the opening 420a is disposed, and one of the optical holders 430. A stepped protrusion 430a coupled to the stepped groove 410a may be formed at a lower side of the side surface.

Accordingly, the camera module 400 of the present embodiment can prevent or minimize the inflow of foreign objects through the combined portion of the step groove 410a and the step protrusion 430a.

On the other hand, the camera module 400 of the present embodiment has a configuration other than the coupling structure of the stepped groove 410a and the stepped protrusion 430a is the same as the first embodiment described above, a detailed description thereof will be omitted.

Next, a fifth embodiment of the camera module according to the present invention will be described in detail with reference to FIGS. 6A to 6B.

6A is an exploded perspective view schematically illustrating a fifth embodiment of a camera module according to the present invention, and FIG. 6B is a cutaway perspective view illustrating a state in which an image sensor and a guide are provided on a substrate of FIG. 6B.

6A to 6B, the fifth embodiment 500 of the camera module according to the present invention includes a substrate 510 on which an image sensor 511 is mounted, and the substrate, like the camera module of the first embodiment. It may include a guide 520 provided on the upper portion of the 510, and an optical holder 530 provided on the substrate 510 and having at least one lens (L).

However, unlike the first embodiment described above, the camera module 500 of the present embodiment discloses that the outer surface of the optical holder 530 is in close contact with the inner surface of the guide 520.

That is, the camera module 500 of the present embodiment is configured such that the guide 520 surrounds the lower side surface portion of the optical holder 530.

On the other hand, the camera module 500 of the present embodiment has the same configuration as the above-described first embodiment except for the structure in which the guide 520 surrounds the side portion of the optical holder 530, and thus the detailed description thereof will be omitted. .

Next, a sixth embodiment of the camera module according to the present invention will be described in detail with reference to FIGS. 7A to 7B.

7A is an exploded perspective view schematically illustrating a sixth embodiment of a camera module according to the present invention, and FIG. 7B is a combined perspective view of FIG. 7A.

7A to 7B, a sixth embodiment of a camera module according to the present invention includes a substrate 610 on which an image sensor 611 is mounted and a substrate 610 similar to the camera module of the fifth embodiment. It may include a guide 620 provided on the upper portion of the substrate, and an optical holder 630 provided on the substrate 610 and having at least one lens (L).

However, unlike the fifth embodiment described above, the camera module 600 of the present embodiment has a support end 625 formed on the inner surface of the guide 620 and the support end 625 formed on the optical holder 630. It is disclosed that the supporting groove 635 is formed.

Here, the support end 625 may be formed on at least one inner surface of the inner surface of the guide 620, or may be formed on opposite inner surfaces of the inner surface of the guide 620.

Of course, the support groove 635 may be formed in a number corresponding to the support end 625.

Accordingly, the camera module 600 of the present embodiment can more stably perform the vertical movement of the optical holder 630 compared to the above-described fifth embodiment, and more effectively tilt the optical holder 630. It can prevent.

On the other hand, the camera module 600 of the present embodiment has the same configuration as the above-described fifth embodiment except for the structure of the support end 625 and the support groove 635 will not be described in detail.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, and that various changes, substitutions and alterations can be made therein without departing from the spirit and scope of the invention. However, it should be understood that such substitutions, changes, and the like fall within the scope of the following claims.

100: first embodiment 110 of a camera module
111: image sensor 120: guide
130: optical holder L: lens

Claims (8)

A guide provided on the substrate having the image sensor mounted thereon, the guide having grooves formed on one side thereof; And
The lens is mounted therein, and is vertically moved while being supported by the guide, and is closely coupled with the guide at the top of the substrate after the focusing adjustment by adjusting the distance between the image sensor and the lens. An optical holder having uneven protrusions on one side thereof;
Lt; / RTI >
The optical holder and the guide are coupled to the camera module to prevent the tilt by the uneven coupling.
The method of claim 1,
The guide module is formed in a shape surrounding the image sensor.
The method according to claim 1 or 2,
An insertion hole is formed on an upper surface of the substrate, and the camera module has an insertion protrusion corresponding to the insertion hole.
delete The method of claim 1,
The optical holder is fixed to the guide by a laser or ultrasonic welding method.
The method of claim 5,
A camera module in which the fusion hole for the fusion is formed in the optical holder or the guide.
delete The method of claim 2,
An opening is formed in a front surface of the guide, a stepped groove is formed in a front surface of the substrate on which the opening is disposed, and the optical holder is formed with a stepped protrusion coupled to the stepped groove.

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