KR20190107826A - Lens assembly and camera module including thereof - Google Patents

Abstract

According to one embodiment of the present invention, provided is a camera module which comprises: a lens barrel mounted to a housing and having a plurality of lenses sequentially stacked from an object side to an image side; and at least one spacer provided between the plurality of lenses and having a rectangular through hole.

Description

Lens assembly and camera module including same {LENS ASSEMBLY AND CAMERA MODULE INCLUDING THEREOF}

The present invention relates to a lens assembly and a camera module including the same.

Camera modules are used in personal mobile terminals such as mobile phones and PDAs. In the camera module, a plurality of lenses are stacked and coupled along an optical axis in a cylindrical barrel, and an optical filter and an image sensor are coupled to a lens barrel and a lower part of a lens inside a housing.

On the other hand, in the conventional camera module, when a strong light is incident at a certain angle in a fluorescent light or a dark dark room, a problem occurs that causes a reflection of the inner surface on the lens rib surface accommodated in the lens barrel at a certain angle.

These lights are light that is not related to the imaging and cause flare or ghosting on the screen.

Therefore, there is a need to block light incident on the image forming surface of the image sensor through internal reflection on the lens rib surface.

In particular, as the size of the portable terminal becomes smaller and thinner, the size reduction is required separately from the performance improvement of the camera module. In such a situation, a new method for preventing flare or ghosting is required.

The present invention is to solve the above problems, to provide a lens assembly and a camera module that can reduce the flare or ghost phenomenon while maintaining the shape of the lens module.

Lens assembly according to an embodiment of the present invention comprises a lens barrel having a plurality of lenses are sequentially stacked from the object side to the image side; And at least one spacer provided between the plurality of lenses and having a rectangular through hole.

In addition, the camera module according to an embodiment of the present invention includes a lens barrel mounted on the housing and having a plurality of lenses sequentially stacked from the object side to the image side and having a first marker for positioning; At least one spacer provided between the plurality of lenses, the at least one spacer having a through hole to allow light to pass therethrough, and a second marker positioned at an edge thereof; And an image sensor having a rectangular shape having light passing through the plurality of lenses and having a long side and a short side, wherein the rectangular through hole is disposed to be relatively disposed with the long side and the short side of the image sensor. The second marker may be provided at a corresponding position.

The present invention can provide a lens assembly and a camera module to reduce the flare or ghost phenomenon by optimizing the shape and arrangement of simple components while minimizing the appearance change of the lens module.

1 is a combined perspective view of a camera module according to an embodiment of the present invention,
2 is an exploded perspective view of a camera module according to an embodiment of the present invention,
3 is an exploded perspective view showing the arrangement of the lens assembly (lens barrel, lens, etc.) and the image sensor according to an embodiment of the present invention,
4 is an exploded perspective view (a) and a combined perspective view (b) illustrating a lens assembly (a shape in which a lens and a spacer are coupled to a lens barrel) according to an embodiment of the present invention;
5 to 7 are exploded perspective views (a) and combined perspective views (b) illustrating a lens assembly (a shape in which a lens and a spacer are coupled to a lens barrel) according to another embodiment of the present invention.

The objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and the preferred embodiments associated with the accompanying drawings. In the present specification, in adding reference numerals to the components of each drawing, it should be noted that the same components as possible, even if displayed on different drawings have the same number as possible. In addition, in describing the present invention, if it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, a camera module 100 according to an embodiment of the present invention is disclosed. 1 to 3, the camera module 100 according to an embodiment includes at least a lens barrel 110, a housing 180, an optical filter 170 (eg, an infrared filter (IR filter), etc.). , An image sensor 150, and a circuit board 190.

Here, a plurality of lenses (eg, L1 to L6) are sequentially stacked from the object side to the image side in the lens barrel 110, and spacers (eg, S1 to S5) may be disposed between the plurality of lenses. have. That is, the lens assembly may be formed by including the lens barrel 110 and the configuration provided inside the lens barrel 110.

The lens barrel 110 is disposed inside the housing 180. The plurality of lenses may be fixed to the lens barrel 110 by pressing or bonding with an adhesive. Alternatively, a plurality of lenses may be fixed by the press-fit ring that supports the last lens in the image side direction. In addition, the spacers S1 to S5 may be coupled to one surface of an adjacent lens or an edge may be coupled to the lens barrel 110.

In addition, an optical filter 170 fixed to the housing 180 is provided below the lens barrel 110, and a circuit board 190 having an image sensor 150 attached to an upper surface thereof is coupled to the lower portion of the housing 180. do.

With this structure, the light incident on the lens barrel 110 is received by the image sensor 190 through the optical filter 170 through the lenses and the imaging is performed.

Here, the lens barrel 110 is generally rounded or part of the outer surface is cut flat to the lower end, that is, the end portion of the lens barrel 110 toward the image side (in the direction of the image sensor 150) in order to maximize space utilization. 'D' shape may be provided with a D-cut.

In addition, the plurality of lenses may be a round cut or a decut lens having a straight portion of which one side is cut.

This embodiment is applicable to all lens barrels having a plurality of lenses, for the convenience of description will be described with an example of a structure in which six lenses are provided (hereinafter, in order from the object side to the image side direction) "First lens", "second lens" ... "6th lens", etc. The spacer is also referred to in the same manner).

The present embodiment may have a structure in which six lenses are provided in the lens barrel 110, and all lenses may be circular lenses, or all lenses may be decut lenses having straight portions at their edges. Of course, the plurality of lenses may be partially circular lenses and others may be decut lenses. In addition, spacers S1 to S5 may be provided between adjacent lenses. The spacer adjacent to the decut lens may have a decut or a circle corresponding to the decut lens.

In the present embodiment, in order to reduce flare or ghost generation due to light reflection, light may be previously prevented from being incident on an unnecessary area by the spacer. It is provided in the rectangular shape which has, and can reduce flare and ghost generation more efficiently.

The image sensor 150 mounted on the camera module 100 is provided in a rectangular shape (hereinafter, a long side constituting a rectangle is referred to as a long side LL and a short side as a short side LS). The spacer having a through hole H of the spacer (eg, the first spacer S1) may be mounted to the lens barrel 110 in a relative arrangement (alignment) as shown in FIG. 3 in the optical axis direction. Can be. In other words, the image sensor 150 may be disposed in the housing 180 such that the short side LS is parallel to the short side of the spacer S1.

In the present embodiment, for convenience of description, the first spacer S1 adjacent to the first lens L1 is provided as a rectangular shape having a short side and a long side as an example. Of course, this is an example. The first spacer S1 may be provided in a round circle, and other spacers may be provided in a square shape having short sides and long sides.)

When the at least one spacer (eg, S1) is provided with a rectangular through hole H as shown in the present embodiment, the rectangular shape sensor 150 having a short side LS and a long side LL is substantially coincident with each other. Relative to the direction. That is, the short side of the through hole H may be parallel to the short side of the image sensor 150, and the long side of the through hole may be disposed to be parallel to the long side of the image sensor 150. Of course, the centers of the through-holes H and the image sensor 150 may be aligned with the optical axis.

Furthermore, the ratio of the long side and the short side of the through hole H and the image sensor 150 may be substantially the same.

4 to 7 illustrate lens barrels 110, 110-1, 110-2, 110-3, and 110-4 according to an embodiment of the present invention. Exploded perspective view (a) and a combined perspective view showing a shape in which 130-2, 130-3, 130-4 and the first spacers S1, 150-1, 150-2, 150-3, and 150-4 are coupled to each other; (b). In the present embodiment, the spacer having the rectangular through-holes H, 151-1, 151-2, 151-3, and 151-4 may be any one of the first to fifth spacers. For example, the through-holes H, 151-1, 151-2, 151-3, and 151-4 having a rectangular shape will be described as an example in the first spacer S1.

Referring to FIG. 4, the lens barrel 110-1 of the present embodiment has a plurality of lenses L1 to L6 stacked therein, and spacers S1 to S5 are disposed between the lenses L1 to L6. It may be provided. In addition, at least one of the plurality of spacers S1 to S5 (for example, S1 and 150-1) may have a rectangular shape in which the through holes H and 151-1 through which light passes have short and long sides.

In addition, light disposed through the lens barrel 110-1 and passing through the plurality of lenses L1 to L6 is formed in the housing 180 of the camera module 100, and the long side LL and the short side LS are formed. Image sensor 150 having a rectangular shape may be provided.

Here, the rectangular through hole 151-1 may be arranged to be aligned with the long side and the short side of the image sensor 150.

Thus, in the present exemplary embodiment, the through hole 151-1 of the first spacers S1 and 150-1, which is one of the spacers S1 to S5 disposed in the lens barrel 110-1, is connected to the image sensor 150. It contains a structure that allows relative placement (alignment).

First, the spacer 150-1 having the rectangular through-hole 151-1 is coupled to one surface of any one of the adjacent lenses (in FIG. 4, the surface of the first lens L1). When the first lens L1 is a decut lens 130-1 having a straight portion 135-1 at the rim thereof, the decut lens 130-1 is a lens. Fitted to the first decut groove 115-1 of the barrel 110-1, the spacer 150-1 is provided as a decut spacer 150-1 having a straight portion 153-1 and has a decut spacer ( The 150-1 may be fitted into the second decut groove 133-1 provided on one surface of the decut lens 130-1.

As described above, the decut spacer 150-1 is coupled to the decut lens 130-1 so that the straight portions 153-1 and 135-1 are oriented in parallel (aligned) with each other, and the decut lens 130-1 is used. ) Is coupled to the lens barrel 110-1 so as to have a directivity, and thus, the decut spacer 150-1 may be coupled to the lens barrel 110-1 so that the through-hole 151-1 has a constant direction. . Accordingly, the rectangular through hole 151-1 and the rectangular image sensor 150 of the decut spacer 150-1 may be coupled to the housing 180 in a relative arrangement (alignment) to have a predetermined direction. have.

Next, referring to FIG. 5, the lens barrel 110-2 of the present embodiment has a plurality of lenses L1 to L6 stacked therein, and the spacers S1 to L6 between the lenses L1 to L6. S5) may be provided. In addition, at least one of the spacers S1 to S5 (for example, S1 and 150-2) may have a quadrangular shape in which the through holes H and 151-2 through which light passes have short and long sides.

In addition, the housing 180 of the camera module 100 is disposed under the lens barrel 110-2, and light passing through the plurality of lenses L1 to L6 is imaged to form a long side LL and a short side LS. Image sensor 150 having a rectangular shape may be provided.

Here, the rectangular through hole 151-2 may be disposed in a relative arrangement (alignment) with the long side and the short side of the image sensor 150.

Thus, in the present exemplary embodiment, the through hole 151-2 of the first spacers S1 and 150-2, which is one of the spacers S1 to S5 disposed in the lens barrel 110-2, is connected to the image sensor 150. It contains a structure that allows relative placement (alignment).

First, the spacer 150-2 having the rectangular through hole 151-2 is coupled to one surface of any one of the adjacent lenses (in FIG. 5, the spacer 150-2 is connected to one surface of the first lens L1). A structure in which the spacer 150-2 is coupled) and the first lens L1 is a circular lens 130-2 having a groove-shaped first marker 135-2 at an edge thereof, 2), the first marker 135-2 is fitted to the second marker 115-2 of the lens barrel 110-2, and the spacer 150-2 is a groove-shaped third marker 153-2. Is provided as a marking spacer 150-2, and the marking spacer 150-2 is a protrusion-shaped fourth marker 133 in which a third marker 153-2 is provided on one surface of the circular lens 130-2. -2) and can be combined.

As described above, the marking spacer 150-2 is coupled to the circular lens 130-2 so that the third marker 153-2 and the fourth marker 133-2 are mutually directional, and the circular lens 130-2 is fixed. ) Is coupled to the lens barrel 110-2 so that the first marker 135-2 and the second marker 115-2 are mutually directional, so that the marking spacer 150-2 is eventually passed through the through hole 151-. 2) may be coupled to the lens barrel 110-2 to have a constant direction. Accordingly, the rectangular through hole 151-2 and the rectangular image sensor 150 of the marking spacer 150-2 may be coupled to the housing 180 in a relative arrangement (alignment).

Next, referring to FIG. 6, in the lens barrel 110-3 of the present exemplary embodiment, a plurality of lenses L1 to L6 are stacked inside, and the spacers S1 to L6 are disposed between the lenses L1 to L6. S5) may be provided. In addition, at least one of the plurality of spacers S1 to S5 (for example, S1 and 150-3) may have a quadrangular shape in which the through holes H and 151-3 through which light passes have a short side and a long side.

In addition, the housing 180 of the camera module 100 is disposed under the lens barrel 110-3, and light passing through the plurality of lenses L1 to L6 is imaged to form a long side LL and a short side LS. Image sensor 150 having a rectangular shape may be provided.

Here, the rectangular through hole 151-3 may be disposed in a relative arrangement (alignment) with the long side and the short side of the image sensor 150.

Thus, in the present exemplary embodiment, the through hole 151-3 of the first spacers S 1 and 150-3, which is one of the spacers S 1 to S 5 disposed in the lens barrel 110-3, is connected to the image sensor 150. It contains a structure that allows relative placement (alignment).

First, the spacer 150-3 having the rectangular through-hole 151-3 has a structure in which the edge is coupled to the lens barrel 110-3, and the spacer 150-3 is a straight portion 157 at the edge. In the case of the decut spacer 150-3 having the -3), the first lens L1 may be a circular or decut lens, and the decut spacer 150-3 may be the third lens of the lens barrel 110-3. It may be fitted into the cut groove 117-3.

As such, the straight portions 157-3 of the decut spacer 150-3 have directivity parallel to each other (aligned) with the straight portions of the third decut groove 117-3 of the lens barrel 110-3. Since it is coupled, the decut spacer 150-3 may be coupled to the lens barrel 110-3 such that the through hole 151-3 has a constant direction. Accordingly, the rectangular through hole 151-3 and the rectangular image sensor 150 of the decut spacer 150-3 may be coupled to the housing 180 in a relative arrangement (alignment).

In addition, referring to FIG. 7, the lens barrel 110-4 according to the present exemplary embodiment includes a plurality of lenses L1 to L6 stacked therein, and the spacers S1 to S5 between the plurality of lenses L1 to L6. ) May be provided. In addition, at least one of the spacers S1 to S5 (for example, S1 and 150-4) may have a quadrangular shape in which the through holes H and 151-4 through which light passes have short and long sides.

In addition, the housing 180 of the camera module 100 is disposed under the lens barrel 110-4, and light passing through the plurality of lenses L1 to L6 is imaged to form a long side LL and a short side LS. Image sensor 150 having a rectangular shape may be provided.

Here, the rectangular through hole 151-4 may be disposed in a relative arrangement (alignment) with the long side and the short side of the image sensor 150.

Thus, in the present exemplary embodiment, the through hole 151-4 of the first spacers S 1 and 150-4, which is one of the spacers S 1 to S 5 disposed in the lens barrel 110-4, is connected to the image sensor 150. It contains a structure that allows relative placement (alignment).

The edge of the spacer 150-4 having the rectangular through-hole 151-4 is coupled to the lens barrel 110-4, and the spacer 150-4 is a groove-shaped fifth marker at the edge. In the case of the marking spacer 150-4 having the 157-4, the first lens L1 may be a circular or decut lens, and the fifth marker 157-4 of the marking spacer 150-4 may be formed. The sixth marker 117-4 of the lens barrel 110-4 may be fitted correspondingly (aligned).

As such, since the fifth marker 157-4 of the marking spacer 150-4 and the sixth marker 117-4 of the lens barrel 110-4 are coupled to each other so as to have a direct orientation (alignment), the marking is performed. The spacer 150-4 may be coupled to the lens barrel 110-4 such that the through hole 151-4 has a predetermined direction. Accordingly, the rectangular through hole 151-4 and the rectangular image sensor 150 of the marking spacer 150-4 may be coupled to the housing 180 in a relative arrangement (alignment).

In the above description of the configuration and features of the present invention based on the embodiment according to the present invention, the present invention is not limited thereto, and various changes or modifications can be made within the spirit and scope of the present invention. It will be apparent to those skilled in the art, and thus such changes or modifications are found to belong to the appended claims.

100: camera module
110: lens barrel
150: image sensor
170: optical filter
180: housing
190: circuit board

Claims (12)

A lens barrel having a plurality of lenses sequentially stacked from the object side to the image side; And
And at least one spacer provided between the plurality of lenses and having a rectangular through hole.
The method of claim 1,
The through hole is a lens assembly provided to be disposed relative to the long side and short side of the image sensor.
The method of claim 1,
The spacer having the rectangular through-hole is coupled to one surface of any one of the adjacent lenses.
The method of claim 3,
The lens to which the spacer having the rectangular through hole is coupled is a decut lens having a straight portion at an edge thereof.
The decut lens is a lens assembly coupled to the straight line side by side in a first decut groove having a straight portion provided in the lens barrel.
The method of claim 4, wherein
The spacer having a rectangular through hole is a decut spacer having a straight portion at an edge thereof,
The decut spacer is a lens assembly coupled to the straight line side by side in a second decut groove having a straight portion provided on one surface of the decut lens.
The method of claim 3,
The lens to which the spacer having the rectangular through-hole is coupled is a marking lens having at least one groove or protrusion-shaped first marker at an edge thereof.
The marking lens is the lens assembly is coupled to the first marker to the at least one second marker of the projection or groove shape provided in the lens barrel.
The method of claim 6,
The spacer having a rectangular through hole is a marking spacer having at least one groove or protrusion-shaped third marker at an edge thereof.
The marking spacer is the lens assembly is coupled to the third marker is inserted into at least one fourth marker of the projection or groove shape provided on one surface of the marking lens.
The method of claim 1,
The spacer having the through-hole of the rectangular shape is coupled to the lens barrel.
The method of claim 8,
The spacer having a rectangular through hole is a decut spacer having a straight portion at an edge thereof,
The decut spacer is a lens assembly in which the linear portions are coupled in parallel to the first decut groove having a straight portion provided in the lens barrel.
The method of claim 8,
The spacer having a rectangular through hole is a marking spacer having at least one groove or protrusion-shaped fifth marker at an edge thereof.
The marking spacer is the lens assembly is coupled to the fifth marker to the at least one sixth marker of the projection or groove shape provided in the lens barrel.
The method of claim 2,
And the through hole and the image sensor have substantially the same ratio of long side and short side.
A lens barrel mounted to the housing and having a plurality of lenses sequentially stacked from the object side to the image side and having a first marker for positioning;
At least one spacer provided between the plurality of lenses, the at least one spacer having a through hole to allow light to pass therethrough, and a second marker positioned at an edge thereof; And
And an image sensor having a rectangular shape having light passing through the plurality of lenses and having long and short sides.
The rectangular through-hole is provided with a camera module at a position corresponding to the first marker and the second marker so as to be disposed relative to the long side and short side of the image sensor.

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