KR101004958B1 - Camera Module - Google Patents

Abstract

The camera module according to the present invention comprises a lens barrel having at least one lens; A substrate unit on which an image sensor for forming an image by imaging light incident through the lens is mounted; And a housing which is assembled with the lens barrel and has a filling space on the contact surface with the substrate to fill the adhesive for adhering to the substrate portion, wherein the housing is in contact with the substrate and supports the filling space of the adhesive. It is preferable to include an adhesive portion spaced apart from the substrate portion to form a.

Description

Camera Module

The present invention relates to a camera module, and more particularly, to a camera module for performing an imaging function mounted on a personal portable terminal or the like to capture an image.

Recently, with the development of communication technology and digital information processing technology, portable terminal technology in which various functions such as information processing and arithmetic, communication, image information input and output are integrated is emerging.

Specific examples include a PDA equipped with a digital camera and a communication function, a mobile phone with a digital camera function, a personal multi-media player (PMP), and the like.

In addition, due to the development of digital camera technology and information storage capability, it is increasingly common to mount a high specification digital camera module on a personal mobile device.

The camera module is changing from a low pixel to a high pixel center in order to meet the performance improvement demand of the consumer, and at the same time, it is changing to a device capable of implementing various additional functions such as auto focusing (AF) and optical zoom. .

In general, the camera module includes an additional substrate electrically connected to the personal portable terminal, and the substrate is electrically connected to the personal portable terminal to operate the camera module. And the housing which accommodates a lens barrel is adhere | attached to the board | substrate through an adhesive agent.

At this time, when the housing is bonded to the substrate via the adhesive, a phenomenon in which the adhesive naturally flows into or out of the substrate is caused by the fluidity of the adhesive.

In addition, the adhesive flowing to the outside of the substrate by this phenomenon contaminates the pad or the like formed on the substrate to generate a poor contact with the personal handheld terminal, and spread to the outer surface of the housing to cause a poor appearance of the camera module.

As a result, because of such defects, the substrate of the camera module is discarded, resulting in an economic loss that lowers the productivity of the product, and techniques for solving this problem are increasingly required.

The present invention is to solve the above-mentioned problems of the prior art, the object is to include a housing in which the space filled with the adhesive is formed so that the adhesive flows to the outside of the substrate portion by the pressure of the housing when bonding the housing to the substrate portion It is to provide a camera module that can be prevented.

The camera module according to the present invention comprises a lens barrel having at least one lens; A substrate unit on which an image sensor for forming an image by imaging light incident through the lens is mounted; And a housing which is assembled with the lens barrel and has a filling space on the contact surface with the substrate so that an adhesive for adhering to the substrate portion is filled.

In addition, the housing of the camera module according to the present invention may be characterized in that it comprises a support for contacting and supporting the substrate portion, and the adhesive portion spaced apart from the substrate portion to form a filling space of the adhesive.

In addition, the adhesive portion of the camera module according to the present invention may be characterized in that formed on each of the four corners of the housing.

In addition, the housing of the camera module according to the present invention may be formed adjacent to the adhesive portion, characterized in that it comprises a cover for providing an escape space so that the adhesive flows outward.

In addition, the escape portion of the camera module according to the present invention may be formed to be spaced apart from the substrate portion than the adhesive portion.

In addition, the housing of the camera module according to the present invention may be characterized in that it comprises a boss (boss) protruding toward the substrate portion formed in four corners.

In addition, the substrate of the camera module according to the invention may be characterized in that it comprises a binding groove formed in a shape recessed inward from the four corners and coupled to the boss.

In addition, the substrate of the camera module according to the invention may be characterized in that it comprises a side pad for electrically connecting with an external device.

In the camera module according to the present invention, since the adhesive filling space is formed in the housing to prevent the adhesive from being squeezed by the housing and spreading to the outside of the substrate when the housing is adhered to the substrate by the adhesive, the substrate is formed by the adhesive. There is an effect of preventing contamination of the side pads.

The camera module according to the present invention will be described in more detail with reference to FIGS. 1 to 8. Hereinafter, with reference to the drawings will be described in detail a specific embodiment of the present invention.

However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention may deteriorate other inventions by adding, changing, or deleting other elements within the scope of the same idea. Other embodiments that fall within the scope of the present invention may be easily proposed, but this will also be included within the scope of the present invention.

1 is a perspective view of a camera module according to a first embodiment of the present invention, Figure 2 is an exploded perspective view of the camera module of Figure 1, Figure 3 is a cross-sectional view for explaining the camera module of FIG.

1 to 3, the camera module 100 includes a lens barrel 110, an image sensor 120, an IR filter 130, a substrate unit 140, and a housing 150.

The lens barrel 110 has an internal space of a predetermined size, and corresponds to a hollow cylinder in which one or more lenses are arranged along an optical axis, and a lens hole for transmitting light may be formed in an upper surface thereof.

In this case, although not shown in detail, the lenses disposed in the lens barrel 110 may include at least one spacer to maintain a predetermined distance between adjacent lenses.

However, the number of lenses disposed in the lens barrel 110 is not limited and may be all at least one.

In addition, the camera body may further include an actuator (not shown) capable of reciprocating the lens in the optical axis direction when power is applied. The actuator is applied to the VCM (Voice Coil Motor) using a magnet and a coil to realize the lens movement by the electromagnetic force generated by the electric field generated by applying the power to the coil and the magnetic field generated from the magnet, and when applying the power The piezoelectric actuator may be provided in various forms such as a piezo actuator using a piezoelectric body to realize lens movement by deformation of the piezoelectric body.

On the other hand, as shown in Figure 1, the lens barrel 110 is coupled to the housing 150, the coupling method may be a male screw portion is formed on the outer surface of the lens barrel 110, the male screw portion It may be screwed with the female screw formed on the inner surface of the housing 150. However, the coupling structure of the lens barrel and the housing is not limited to this structure.

Although not necessarily a component in the present invention, the inside of the housing 150 may be provided with an adhesive bonding IR filter 130 that can filter the infrared rays of the light passing through the lens.

The image sensor 120 has an image imaging region on an upper surface thereof to form light incident through a lens, and is an imaging device capable of converting it into an electrical signal.

In addition, the image sensor 120 may be mounted on the upper surface of the substrate unit 140 by wire bonding or the like, but the image sensor 120 is preferably mounted on the substrate unit 140, but is not limited thereto.

The substrate unit 140 is coupled to the housing 150 to fix the position of the housing 150. At this time, four corners of the substrate unit 140 are formed with a binding groove 142 having a semi-circular recessed shape toward the inside thereof, and the boss 152 and the binding groove 142 protruding downward from the housing 150 are bound. Therefore, the housing 150 is fixed without being shaken by external force.

As shown in FIGS. 1 and 2, a plurality of semicircular side holes are formed on the side of the substrate unit 140, and side pads 144 are electrically provided in the side holes.

Therefore, the board unit 140 is mounted to be electrically connected to an external socket (not shown) through an insertion method, and is electrically connected to a personal portable terminal through an socket in an automated manner.

In addition, a circuit pattern (not shown) is formed on the substrate unit 140, and a space is provided at the center of the substrate unit 140 to mount the image sensor 120, and the image sensor 120 is the substrate unit 140. Wire bonded to electrically connect with a pad formed thereon.

The upper surface of the substrate unit 140 is preferably provided with a protection unit for protecting the circuit pattern. The protection part is preferably applied on the substrate part including photo solder resist (PSR) present in liquid form. However, the protective part is not limited to the material of PS.

The housing 150 includes a barrel water groove coupled to the lens barrel 110 and is disposed above the substrate unit 140. In addition, a female screw portion that may be screwed with a male screw portion formed on an outer surface of the lens barrel 110 may be formed on an inner circumferential surface of the inner hole.

And, the housing 150 is provided with a boss 152 protruding downward, the boss 152 is formed in the corner of the substrate portion 140 is bound to the binding groove 142 is bound to the boss 152, Through the binding, the housing 150 and the substrate 140 are fixed to each other.

Therefore, the boss 152 is coupled to the binding groove 142 to fix the position of the housing 150 to the substrate portion 140, thereby preventing the position of the housing 150 from being changed by external force and stably housing The 150 may be fixed to the substrate unit 140.

In addition, the housing 150 includes a support part 154 and an adhesive part 156.

The support part 154 may refer to a surface which contacts the substrate part 140 at the bottom of the housing 150 to support the housing 150 from the substrate part 140, and the support part 154 may also be referred to as the housing 150. It is formed at the four corners of the can be formed in a portion adjacent to the boss 152. However, the position of the support 154 is not limited thereto.

The adhesive part 156 may be formed at a position coinciding with four corners at the bottom of the housing 150, and spaced apart from the substrate part 140 to form a filling space 158 of an adhesive for adhering to the substrate part 140. It is formed to be. In this case, the filling space 158 may be formed to be a height slightly lower than the height to which the adhesive is applied.

4 and 5 are partial schematic views for explaining the adhesion of the housing and the substrate in the camera module according to the first embodiment of the present invention.

As shown in FIG. 4, the housing 150 applies the adhesive 160 to a position bonded to the housing 150 and the substrate portion 140 before bonding to the substrate portion 140.

Then, the lower portion of the housing 150 is moved to correspond to the bonding position to the substrate portion 140 (ⓐ), and the support portion 154 of the housing 150 is moved to the substrate portion while the adhesive is in contact with the bonding point of the housing 150. To the point of contact 140.

As shown in FIG. 5, when the support part 154 of the housing 150 and the substrate part 140 are in contact with each other, the adhesive part 156 compresses a part of the adhesive 160 and is bungeeed outward of the substrate part 140. It becomes.

In this case, if there is no filling space for filling the adhesive, the housing 150 compresses most of the adhesive 160 and overflows to the outside of the substrate portion 140 to contaminate the side pad 144. In the filling space 158 is formed and since the adhesive portion 156 of the housing 150 is pressed only to a part of the adhesive 160, the adhesive 160 stops its flow on the substrate portion 140 without flowing to the outside. .

Therefore, in the camera module according to the present embodiment, when the housing 150 is adhered to the substrate unit 140 via the adhesive 160, the adhesive 160 is pressed by the housing to the outside of the substrate unit 140. Since it is prevented from bleeding, there is an effect of preventing the side pad 144 of the substrate portion 140 from being contaminated by the adhesive 160.

In addition, the camera module according to the present exemplary embodiment does not need to have a separate pollution prevention structure on the substrate unit 140 because the substrate unit 140 is not contaminated by the adhesive 160. Therefore, since the board | substrate part can use the resin substrate which is cheaper than a ceramic board | substrate, it is more economical.

6 is a perspective view illustrating a camera module according to a second embodiment of the present invention, FIG. 7 is a partial perspective view of the camera module of FIG. 6, and FIG. 8 is a cross-sectional view of the camera module of FIG. 6.

6 to 8, the camera module 200 includes a lens barrel 110, an image sensor 120, an IR filter 130, a substrate unit 140, and a housing 250.

In the present exemplary embodiment, the lens barrel 110, the image sensor 120, the IR filter 130, and the substrate unit 140 are substantially the same as those of the first exemplary embodiment, and thus a detailed description thereof may be omitted.

The housing 250 includes a support 254, an adhesive 256, and an escape 257.

The support part 254 may refer to a surface which contacts the substrate part 140 at the bottom of the housing 250 to support the housing 250, and the support part 254 may be formed at four corners, and the boss 252 is preferably formed in a portion adjacent to the periphery. However, the position of the support 254 is not limited thereto.

The adhesive part 256 is preferably formed at a position adjacent to four corners at the bottom of the housing 250, and is spaced apart from the substrate part 140 to form a filling space 258 of an adhesive for adhering to the substrate part 140. It is formed to be.

At this time, the filling space 258 is preferably formed to be a height slightly lower than the height of the adhesive when the adhesive is applied. Therefore, when the housing 250 is adhered to the substrate portion 140, the adhesive 160 is compressed only by the difference between the height of the adhesive 160 and the height of the adhesive portion 256 spaced apart from the substrate portion 140.

In addition, the doped portion 257 is formed adjacent to the adhesive portion 256, it is preferably formed to be spaced apart from the substrate portion 140 by a higher interval than the adhesive portion (256). At this time, the escaping portion 257 provides the escaping space 259 so that the adhesive 160 flows outward.

Here, the escape space 259 may refer to a space formed in a flow path when the adhesive is compressed, and the filling space 258 may be a point where the housing 250 and the substrate unit 140 are bonded by filling the adhesive. Can mean.

When the escape part 257 is spaced apart from the substrate part 140 by a higher height than the adhesive part 256, even if the adhesive 160 flows to the outside of the substrate part 140, the escape space 259 can be secured more widely. It is a more advantageous structure to prevent 160 from overflowing outward.

Therefore, even if the adhesive part 256 of the housing 250 is in contact with the adhesive 160 and flows outward, sufficient evacuation space 259 is provided so that the adhesive 160 effectively contaminates the side pad of the substrate part 140. Can be prevented.

In addition, the camera module according to the present exemplary embodiment does not need to have a separate pollution prevention structure on the substrate unit 140 because the substrate unit 140 is not contaminated by the adhesive 160.

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

2 is an exploded perspective view of the camera module of FIG. 1.

3 is a cross-sectional view for describing the camera module of FIG. 1.

4 and 5 are partial schematic views for explaining the adhesion of the housing and the substrate in the camera module according to the first embodiment of the present invention.

6 is a perspective view illustrating a camera module according to a second embodiment of the present invention.

7 is a partial perspective view of the camera module of FIG. 6.

8 is a cross-sectional view of the camera module of FIG. 6.

Explanation of symbols on the main parts of the drawings

110 .... lens barrel 120 .... image sensor

130 ... IR filter 140 ...

150 .... Housing 160 .... Adhesive

Claims (8)

A lens barrel having a lens; A substrate unit on which an image sensor for forming an image by imaging light incident through the lens is mounted; And A housing assembled with the lens barrel and having a filling space at a contact surface with the substrate to fill an adhesive for adhering to the substrate portion; Including, but the housing, And a support part contacting and supporting the substrate part, and an adhesive part spaced apart from the substrate part to form a filling space of the adhesive. delete The method of claim 1, The adhesive unit is a camera module, characterized in that formed on each of the four corners of the housing. The method of claim 1, The housing, A camera portion formed adjacent to the adhesive portion and providing an escape space to allow the adhesive to flow outwardly. The method of claim 4, wherein The camera module, characterized in that formed to be spaced apart from the substrate portion than the adhesive portion. The method of claim 1, And the housing is formed at four corners and includes a boss projecting toward the substrate. The method of claim 6, The substrate portion, And a binding groove formed in a shape recessed inward at four corners and engaged with the boss. The method of claim 1, The substrate portion, Camera module comprising a side pad for electrically connecting to an external device.

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