KR20110008808A - Lens assembly and camera module - Google Patents

Abstract

PURPOSE: A lens assembly and a camera module are provided to minimize lens assembly size by connecting a barrel holder to a screw part. CONSTITUTION: A lens barrel(110) contains a plurality of lenses. A screw part is formed on the single-side of a body. The body places the lens with the smallest diameter. A barrel holder(120) mounts the lens barrel in an internal space by being combined with the screw part. The barrel holder moves the lens barrel upward and downward by the driving force of an actuator.

Description

Lens assembly and camera module {LENS ASSEMBLY AND CAMERA MODULE}

The present invention relates to a lens assembly and a camera module, and more particularly, to a lens assembly and a camera module including the lens assembly to be mounted on a personal portable terminal and the like to perform an imaging function.

In general, the camera module is small and is applied to portable mobile communication devices such as camera phones, PDAs, and smart phones, and various IT devices. Recently, as these devices become smaller and slimmer, the size of the camera module itself becomes smaller and smaller. to be.

In addition, the camera module is manufactured using an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor) as a main component. The stored data is output as an image through a display medium such as an LCD or a PC monitor in the device.

Therefore, in the case of the camera module including the image sensor, high-specific functions capable of performing an auto focusing function or a zooming function are necessarily installed.

However, even with such a high specification camera module, it is a big technical task to reduce the size of the parts according to the trend of the camera module is gradually miniaturized and slimmed.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object thereof is to provide a lens assembly capable of reducing the size of the component and a camera module including the lens assembly.

According to the present invention, a lens assembly may include: a lens barrel accommodating a plurality of lenses therein and having a screw portion formed on one surface of a body on which the lens having the smallest diameter is seated; And a barrel holder which is coupled by screwing with the screw unit to mount the lens barrel in an inner space and moves the lens barrel up and down by a driving force of an actuator acting in an up and down direction.

In addition, the lens barrel of the lens assembly according to the invention may be characterized in that the screw portion is formed in a portion adjacent to the inlet of the lens in the body.

In addition, the barrel holder of the lens assembly according to the present invention may be characterized in that it comprises a cylindrical fixing portion coupled to the screw portion, and a connection portion formed to extend downward from the fixing portion is connected to the external housing. .

In addition, the connecting portion of the lens assembly according to the present invention may include a first bridge formed on one side of the fixing portion, and a second bridge formed on one surface of the fixing portion adjacent to the first bridge. have.

In addition, the fixing part of the lens assembly according to the present invention may be formed in a width corresponding to the screw portion.

In addition, the camera module according to the present invention accommodates a plurality of lenses therein, the lens barrel is formed on one surface of the body on which the lens having the smallest diameter among the lenses, and the lens barrel mounted in the inner space A lens assembly having a barrel holder engaged by the screw portion and screwed so as to be coupled; An actuator for generating a driving force to move the barrel holder in a vertical direction; And a substrate unit on which an image sensor for forming an image by imaging light incident through the lens is mounted.

In addition, the lens barrel of the camera module according to the present invention may be characterized in that the screw portion is formed in a portion adjacent to the inlet of the lens in the body.

In addition, the barrel holder of the camera module according to the present invention may be characterized in that it comprises a cylindrical fixing portion coupled to the screw portion, and a connection portion formed to extend downward from the fixing portion is connected to the external housing. .

In addition, the connection part of the camera module according to the present invention may include a first bridge formed on one side of the fixing portion, and a second bridge formed on one surface of the fixing portion adjacent to the first bridge. have.

In addition, the fixing part of the camera module according to the present invention may be formed in a width corresponding to the screw portion.

The lens assembly and the camera module according to the present invention have a screw portion formed on one surface of a body on which the lens having the smallest diameter is seated among the lenses, and the barrel holder is coupled to the screw portion, thereby reducing the size of the lens assembly to a minimum. There is.

In addition, since the lens assembly and the camera module according to the present invention can form a barrel holder symmetrically to form a shape of the lens barrel to be bound therein, it is possible to accurately eject the mounting portion for mounting the lens in the lens barrel. It is easy to have the effect of improving the quality.

A lens assembly and a camera module according to the present invention will be described in more detail with reference to FIGS. 1 to 4. 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 or the present invention by adding, modifying, or deleting other elements within the scope of the same idea. Other embodiments that fall within the scope of the inventive concept may be readily proposed, but they will also be included within the scope of the inventive concept.

1 is a perspective view illustrating an assembled state of a lens assembly according to an exemplary embodiment of the present invention, FIG. 2 is an exploded perspective view illustrating the lens assembly of FIG. 1, and FIG. 3 is a cross-sectional view of the lens assembly of FIG. 1. to be.

1 to 3, the lens assembly 100 according to the present embodiment includes a lens barrel 110 and a barrel holder 120.

The lens barrel 110 has a predetermined internal space and corresponds to a hollow cylinder in which one or more lenses are arranged along the optical axis. In addition, a lens inlet 114 for transmitting light may be formed through the upper surface of the lens barrel 110.

In this case, the lens barrel 110 may include at least one spacer 112 such that the lenses to be disposed maintain a predetermined distance between adjacent lenses. However, the number of lenses disposed in the lens barrel 110 is not limited to a certain number and may be all at least one.

In addition, the lens barrel 110 includes a body 118 that is an outline in which a plurality of lenses 116 are mounted therein. The body 118 is formed by injection molding, and its shape may be determined according to the diameters of the lenses 116 mounted therein.

Inside the lens barrel 110, a plurality of lenses 116 are sequentially mounted from the lens inlet 114. The diameter of the lens at the position closest to the lens inlet 114 is the smallest according to a general optical element.

Therefore, the threaded portion 119 is formed on the outer surface of the body 118, the threaded portion 119 is preferably formed in close proximity to the lens inlet 114. However, the position of the threaded portion 119 is not limited to this, and may be adjusted according to how the designer arranges the lenses 116.

For example, when the lens 116 having the smallest diameter is mounted at the center of the lens barrel 110, the center portion of the body 118 is formed so that the threaded portion 119 corresponds to its position. 110 is formed on the outer surface. Therefore, the screw portion 119 is formed on the outer surface of the body 118 corresponding to the position of the lens having the smallest diameter among the lenses.

In this case, the lens barrel 110 may be formed in a symmetrical structure that is symmetrical left and right. As shown in FIG. 3, it can be seen that the lens barrel 110 of the present embodiment is symmetrical with respect to the center portion.

In general, since the lens barrel 110 is designed to be moved up and down by an actuator or a motor for focusing, the structure is asymmetrically formed. In this embodiment, the barrel holder 120 is manufactured separately so that the lens barrel ( 110 is formed symmetrically, and it is easy to accurately eject the mounting structure for mounting the lens in the lens barrel 110, etc., thereby improving the quality.

In addition, the barrel holder 120 is screwed with the lens barrel 110 is fixed to each other, while moving up and down by the driving force of the external actuator to move the lens barrel 110 is fixed in position, such movement To adjust the focus of the camera module.

The barrel holder 120 is a cylindrical fixing portion 122 coupled with the threaded portion 119 formed on the outer surface of the body 118, and a connecting portion formed to extend downward from the fixing portion 122 and connected to the external housing. 124 may include.

Fixing portion 122 may be formed in a cylindrical shape to surround the shape of the body 118, the hole is formed to be screwed with the screw portion 119 in the center. At this time, as shown in Figure 2, because the diameter of the hole is narrower than the diameter of the lower portion of the body 118, the lens barrel 110 can only be coupled to the upper portion from the lower portion of the barrel holder 120 (arrow) .

Accordingly, as shown in FIGS. 1 to 3, the barrel holder 120 is screwed to the upper portion of the body 118, which is the smallest portion L of the lens barrel 110, and thus the lens barrel 110 and the lens barrel 110. When the barrel holder 120 is bound, there is an effect that the size can be minimized.

The connection part 124 is connected to one side of the fixing part 122 and is integrally formed with the fixing part 122 to extend toward the lower part of the fixing part 122.

In this case, the connection part 124 may include a first bridge 126 formed on one side of the fixing part 122 and a second bridge 128 formed on one surface of the fixing part 122 adjacent to the first bridge 126. It may include. Therefore, the actuator 170 is in close contact with the side surfaces of the first bridge 126 and the second bridge 128, the shape of the first bridge 126 and the second bridge 128 is formed to be seated inside the hollow of the housing Can be.

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

Referring to FIG. 4, the camera module includes a lens assembly 100, an IR filter 130, an image sensor 140, and a substrate 150.

Here, since the lens assembly 100 is substantially the same as the above-mentioned configuration, a detailed description thereof may be omitted.

The housing 160 is configured to accommodate the lens assembly 100, the IR filter 130, the image sensor 140, the substrate 150, and the like.

At this time, the actuator 170 in close contact with the lens assembly 100 is accommodated in the housing 160, the lens assembly 100 is moved up and down by the driving force provided from the actuator 170.

The IR filter 130 is adhered to and fixed to the center portion of the housing 160, and preferably formed in a rectangular shape corresponding to the shape of the housing 160.

In general, humans recognize light as a wavelength of a wider range than the eye, and still recognize the infrared region as invisible as light. Accordingly, if the image information recognized by the light that does not pass through the IR filter 130 is exported as it is, since an image of a color different from the actual color may be output, the IR filter 130 filters only the visible light region by filtering the infrared region. Function to accept.

In addition, the image sensor 140 is preferably formed on an image forming surface of the lens, and is mounted to be electrically connected to the substrate 150. In addition, the image sensor 140 mounted on the substrate 150 is accommodated in the inner space of the housing 160 together with the substrate 150.

The image sensor 140 functions to convert the optical image received through the lens into an electrical signal. For this purpose, the image sensor 140 may include a pixel array and a photoelectric converter.

Here, the pixel array accumulates charges in response to light passing through the lens, and the photoelectric conversion unit converts the electric charges stored in the pixel array as a light receiving element into a usable electrical signal. As the image sensor 140, a CCD image sensor or a CMOS image sensor may be used.

A chip module is mounted on the substrate 150 around the image sensor 140 using surface mount technology (SMT). After attaching the image sensor 140 with an epoxy bond, a wire bonding process is performed to electrically connect the substrate 150 and the image sensor 140.

However, electrically connecting the image sensor 140 to the substrate 150 is not limited to wire bonding, and may be variously designed according to a designer's intention, such as bonding using a conductive adhesive.

In this case, since the barrel holder 120 is coupled to the upper portion of the lens assembly 110 having the smallest diameter of the lens barrel 110, the lens assembly 110 may minimize its size when the lens barrel 110 and the barrel holder 120 are bound. Can be. Accordingly, the size of the camera module to which the lens assembly 100 is bound is also minimized.

1 is a perspective view illustrating an assembled state of a lens assembly according to an exemplary embodiment of the present invention.

FIG. 2 is an exploded perspective view illustrating the lens assembly of FIG. 1.

3 is a cross-sectional view of the lens assembly of FIG. 1.

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

Explanation of symbols on the main parts of the drawings

110 .... lens barrel 120 .... barrel holder

130 ... IR filter 140 ... Image sensor

150 .... substrate 160 .... housing

170 .... actuator

Claims (10)

A lens barrel accommodating a plurality of lenses therein and having a screw portion formed on one surface of a body on which the lens having the smallest diameter is seated; And A barrel holder which is coupled by screwing with the screw portion to mount the lens barrel in an inner space and moves the lens barrel up and down by a driving force of an actuator acting in a vertical direction; Lens assembly comprising a. The method of claim 1, The lens barrel, And the screw portion is formed at a point in the body adjacent to the inlet of the lens. The method of claim 1, The barrel holder, Lens assembly characterized in that it comprises a cylindrical fixing portion coupled to the screw portion, and a connecting portion formed to extend downward from the fixing portion. The method of claim 3, The connecting portion, And a second bridge formed on one side of the fixing part and a second bridge formed on one surface of the fixing part adjacent to the first bridge. The method of claim 3, The fixing portion is a lens assembly, characterized in that formed in a width corresponding to the screw portion. A lens barrel having a plurality of lenses therein and having a threaded portion formed on one surface of a body on which the lens having the smallest diameter is seated among the lenses; A lens assembly having a barrel holder; An actuator for generating a driving force to move the barrel holder in a vertical direction; And A substrate unit on which an image sensor for forming an image by imaging light incident through the lens is mounted; Camera module comprising a. The method of claim 6, The lens barrel, And the screw portion is formed at a point adjacent to the inlet of the lens in the body. The method of claim 6, The barrel holder, Camera assembly, characterized in that it comprises a cylindrical fixing portion coupled to the screw portion, and a connecting portion formed to extend downward from the fixing portion. The method of claim 8, The connecting portion, And a second bridge formed on one side of the fixing part and a second bridge formed on one surface of the fixing part adjacent to the first bridge. The method of claim 8, The fixing unit is a camera module, characterized in that formed in a width corresponding to the screw portion.

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