KR20100100063A - Camera module - Google Patents

Abstract

PURPOSE: A camera module for reducing the fault of a camera is provided to prevent the overflow of adhesive to the outside of a housing through an adhesive applying opening by fixing the housing and the lens barrel after inserting the adhesive in a point applying type. CONSTITUTION: A camera module includes a substrate(110), a housing(130) and a lens barrel(140). An image sensor(120) is installed to the central part of the substrate. The housing is settled on the top of the substrate. An adhesive applying opening is projected to the top of the housing. The lens barrel is combined to the upper part of the housing. The adhesive is inserted inside an adhesive injection groove of the glue spreading device.

Description

Camera module {Camera module}

The present invention relates to a camera module, and more particularly, to a camera module configured to prevent the overflow of the adhesive to the outside when a separate bonding area is configured on the outside of the upper end of the housing when the housing and the lens barrel.

In general, a camera module is manufactured by using an image sensor module having an image sensor such as a CCD or a CMOS mounted on a substrate, and an optical unit including a housing and a lens barrel. The camera module focuses an image of a subject through the image sensor. Data is stored on a memory in the device, and the stored data is displayed as an image on a display medium such as an LCD or a PC monitor in the device.

In recent years, as the camera module has been slimmed down in mobile terminals such as mobile phones and PDAs, the size reduction and thinning of the module have been rapidly raised, and the overall size of the module has been reduced without reducing the number of pixels of the camera module. Efforts are ongoing.

A typical camera module is typically manufactured by a method such as a chip on board (COB), a chip on flexible (COF), and the brief structure with reference to the drawings shown below.

1 is an assembled perspective view of a camera module manufactured by a COB method, and FIG. 2 is a side view of a conventional COB method camera module.

As shown, the conventional camera module 10 is a printed circuit board 11, the image sensor 12 of the CCD or CMOS is mounted by a wire bonding method is coupled to the lower portion of the plastic housing 13, the housing (13) is produced by the lens barrel 15 is coupled to the top.

The lens barrel 15 is inserted and mounted through the upper opening of the housing 13 in a state where a plurality of lenses L are stacked and coupled therein.

In this case, the housing 13 and the lens barrel 15 are coupled to each other by screwing the female screw portion 13a and the male screw portion 15a formed on the inner and outer circumferential surfaces, respectively, and the lens barrel at the top of the housing 13. Focus adjustment is performed by rotating the distance (15) by adjusting the distance between the lens (L) in the lens barrel (15) and the image sensor (12).

In addition, an IR filter 18 is disposed between the upper surface of the printed circuit board 11, that is, the lens L mounted on the lens barrel 15 and the image sensor 12 attached to the lower surface of the printed circuit board 11. By being combined, the infrared rays of excessive long wavelength flowing into the image sensor 12 are blocked.

In the conventional camera module 10 having the above configuration, the optical unit mounted on the printed circuit board 11, that is, the lens barrel 15 is screwed to the housing 13 and the lens barrel 15. The focus adjustment is made by rotating on the top, and when the focus adjustment is completed, the lens barrel 15 is fixed by applying the adhesive 20 between the housing 13 and the lens barrel 15.

At this time, between the housing 13 and the lens barrel 15, the thermosetting adhesive or UV adhesive is applied as a whole or by applying and curing in a viscous manner, thereby combining the housing 13 and the lens barrel 15.

However, in recent years, the appearance management of the camera module mounted in the terminal is becoming more stringent due to the thinning of the mobile communication terminal on which the camera module is mounted and the integration of parts. When the adhesive 20 is applied in a conventional manner, the housing 13 is applied. Or when the overflow of the adhesive 20 to the outside of the lens barrel 15 has been pointed out that the problem of module assembly failure due to poor appearance performance.

In addition, the conventional camera module 10 has a disadvantage that it is difficult for the operator to control the injection amount of the adhesive into the coating space between the housing 13 and the lens barrel 15 due to the characteristics of the small camera module manufactured to a size of 10 mm or less. There is this.

Accordingly, the present invention was devised to solve the above-mentioned disadvantages and problems raised in the conventional camera module, and the adhesive applicator is protruded to the outside of the upper end of the housing to which the lens barrel is coupled, so that the adhesive after the housing and lens barrel is combined An object of the invention is to provide a camera module in which an adhesive is applied into the applicator to prevent overflow of the adhesive outside the housing.

The object of the present invention includes a substrate having an image sensor mounted in a central portion thereof, a housing mounted on an upper portion of the substrate and having an adhesive applicator protruding outwardly on an upper portion thereof, and a lens barrel coupled to an upper portion of the housing. This is achieved by providing a camera module.

The substrate may be formed of a printed circuit board or a ceramic substrate, and an image sensor is mounted on a central portion of the upper surface of the substrate to be electrically connected to the substrate through connection means such as wire bonding.

The housing is composed of an annular barrel coupler having an opening in the upper body and the lower body of the enclosure type, the barrel coupler is formed on the outer circumferential surface of the adhesive applicator protrudes outward.

The adhesive applicator has an adhesive injection groove formed therein, and at least two or more adhesive points are preferably formed on the barrel coupler.

The adhesive applicator may be formed to protrude in a semi-circular shape having a curvature smaller than the curvature of the barrel coupler, in addition, it may be configured as a square shape having a size that does not deviate outside the lower body of the housing.

In addition, the lens barrel has one or more lenses laminated therein and inserted through the opening of the barrel fitting.

At this time, the housing and the lens barrel are screwed by the female threaded portion or the male threaded portion formed on the inner and outer peripheral surfaces, respectively.

Meanwhile, UV adhesive is injected into the adhesive injection groove formed inside the adhesive applicator so that a part of the adhesive penetrates between the housing and the lens barrel, and is cured by UV irradiation to fix the housing and the lens barrel.

As described above, in the camera module of the present invention, the adhesive is injected in the form of a dot coating through an adhesive applicator protruding out of the housing to fix the housing and the lens barrel, thereby overflowing the adhesive to the outside of the housing through the adhesive applicator. There is an advantage that is prevented, there is an advantage that can significantly reduce the appearance defects of the camera module.

In addition, according to the present invention, as the adhesive is injected through the adhesive applicator protruding outward after coupling the lens barrel to the housing, the effect of the adhesive injection in the assembly process of the camera module can be easily exerted.

Matters relating to the operational effects including the technical configuration of the camera module according to the present invention will be clearly understood by the following description with reference to the drawings showing preferred embodiments of the present invention.

First, Figure 3 is an assembled perspective view of the camera module according to the present invention, Figure 4 is a perspective view of the camera module according to the present invention, Figure 5 is a plan view of a housing employed in the camera module according to the invention, Figure 6 A cross-sectional view of the camera module according to the invention.

As shown, the camera module 100 of the embodiment according to the present invention is mounted on the substrate 110, the substrate 110 is mounted on the image sensor 120, the adhesive applicator 133 protrudes outward It is formed of a housing 130 and a lens barrel 140 coupled to the upper portion of the housing 130.

The substrate 110 is mounted on the image sensor 120 having a light receiving portion in the center of the upper surface, the image sensor 120 wires the pad 121 formed on the upper surface and the pad 111 formed on the substrate 110. (W) It is electrically connected with the board | substrate 110 through the connection means of a bonding.

In this case, the substrate 110 may be formed of a printed circuit board or a ceramic substrate composed of a plurality of layers, the socket coupling or surface mount on the main board of the terminal to be mounted according to the shape of the pad formed on the substrate 110 ( SMT) is mounted.

Meanwhile, although not shown in the drawings, a substrate assembled in a COF (Chip of Flexible) type using a flexible printed circuit board may also be applied. In the case of assembling in a COF type, the light receiving portion of the image sensor is hollow on the lower surface of the substrate. The chip may be flip chip bonded to be exposed through the unit, and the housing may be coupled to the substrate to which the image sensor is coupled.

In addition, the housing 130 is seated on the upper surface of the substrate 110, the housing 130 is composed of a lower barrel 131 and the upper barrel body 131 has an annular barrel coupler 132. The lower body 131 is formed in a box shape, the lower end is in close contact with the upper surface of the substrate 110, the adhesive is applied firmly between the lower surface of the lower body 131 and the edge of the substrate 110. Combined.

The barrel coupler 132 of the housing 130 is formed to protrude to a predetermined height on the lower body 131, the protruding height is determined in consideration of the overall height required in the mounting object when designing the camera module.

In addition, the barrel coupling hole 132 is formed with an opening hole 132a, the inner wall surface of the opening hole (132a) coupling means that can be joined to the outer peripheral surface of the lens barrel 140, mainly female screw portion 132b It is preferable that the coupling means having the form of.

On the other hand, the barrel coupler 132 is provided with an adhesive applicator 133 protruding to the outer peripheral surface. The adhesive applicator 133 is provided as a stepped portion to form an adhesive injection groove 134 having a flat inner bottom surface.

In addition, the adhesive applicator 133 is formed on at least two symmetrical on the barrel coupler 132, the housing 130 and the lens barrel 140, including the design specifications of the appearance of the camera module 100. In consideration of the bonding strength of), it can be formed in an appropriate number at any position.

In addition, the adhesive applicator 133 has a curvature smaller than the curvature of the barrel coupler 132 as shown in FIGS. 3 to 6 of the following drawings, and has a semicircular shape protruding to the outside of the barrel coupler 132. It is preferably configured as, but not necessarily limited to a semi-circular shape may be configured in a variety of shapes, including a square shape of the size does not deviate outward of the lower body 131 of the housing 130.

On the other hand, the lens barrel 140 is inserted into the upper portion of the housing 130 through the opening hole (132a) of the barrel coupler (132). The lens barrel 140 has one or more lenses L laminated therein, and a male screw portion 141 is formed on an outer circumferential surface thereof and fixed to the barrel coupler 132 by screwing.

Looking at the assembly process of the camera module 100 of the present embodiment having such a technical configuration and the coupling process of the housing and the lens barrel by the adhesive as follows.

First, the housing 130 and the lens barrel 140 are temporarily coupled by screwing the female screw portion 132b and the male screw portion 141 to form an optical unit, and then the optical unit is mounted by the image sensor 120. It is seated on top of the substrate 110.

The substrate 110 and the housing 130 are tightly coupled through an adhesive applied between the edge of the substrate 110 and the bottom surface of the housing 130, and the housing 130 is tightly coupled on the substrate 110. In this state, the lens barrel 140 coupled to the top of the housing 130 is rotated left and right to adjust the focus by adjusting the distance between the lens L and the image sensor 120, and the lens barrel ( 140).

Next, the adhesive is injected into the adhesive injection groove 134 of the adhesive applicator 133 in a state in which the rotation of the lens barrel 140 is stopped. At this time, the adhesive may be injected with a thermosetting adhesive or UV adhesive, in this embodiment, as a relatively large amount of adhesive is injected into the adhesive applicator 133 in the form of a dot coating, the curing time is fast and excellent curing strength Preferably, UV adhesive is injected.

Thereafter, a portion of the adhesive injected into the adhesive applicator 133 may be allowed to penetrate between the housing 130 and the lens barrel 140. By irradiating for a predetermined time to allow the adhesive to cure, the assembly of the camera module is completed.

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 an assembled perspective view of a camera module manufactured by a COB method.

Figure 2 is a side view of a conventional COB type camera module.

3 is an assembled perspective view of the camera module according to the present invention.

4 is a perspective view of a camera module according to the present invention.

5 is a plan view of a housing employed in the camera module according to the present invention.

6 is a cross-sectional view of the camera module according to the present invention.

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

110. Substrate 120. Image Sensor

130. Housing 133. Adhesive Applicator

140. Lens Barrel L. Lens

Claims (8)

A substrate on which an image sensor is mounted at the center; A housing seated on the substrate and having an adhesive applicator protruding outward on the substrate; And A lens barrel coupled to an upper portion of the housing; Camera module comprising a. The method of claim 1, The substrate is composed of a printed circuit board or a ceramic substrate, the image sensor mounted in the center of the upper surface of the substrate is electrically connected to the substrate via a connection means such as wire bonding. The method of claim 1, The housing is composed of a lower body of the enclosure type, and an annular barrel engaging portion having an opening hole in the upper portion of the lower body, wherein the adhesive module is formed on the outer circumferential surface of the barrel engaging portion, the camera module. The method of claim 3, The adhesive applicator, the adhesive injection groove is formed on the inside, at least two camera modules are formed on the point of symmetry mutually on the barrel coupler. The method of claim 4, wherein The adhesive applicator is formed, the camera module protruding in a semi-circle having a curvature smaller than the curvature of the barrel coupler. The method of claim 3, The adhesive applicator, the camera module is formed in a size that does not deviate outside the lower body of the housing. The method of claim 1, The housing and the lens barrel, the camera module is screwed by the female or male thread portion formed on the inner, outer peripheral surface, respectively. The method of claim 4, wherein In the adhesive injection groove formed inside the adhesive applicator UV adhesive is injected and cured by UV irradiation to fix the housing and the lens barrel.

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