KR102527704B1 - Lens assembly and camera module including thereof - Google Patents

Abstract

A camera module according to an embodiment of the present invention includes a lens barrel mounted on 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 the 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 portable terminals such as mobile phones and PDAs. In such a camera module, a plurality of lenses are stacked and coupled along an optical axis inside a cylindrical barrel, and an optical filter and an image sensor are coupled to a lens barrel inside a housing and a lower part of the lens.

On the other hand, in the conventional camera module, when strong light is incident at a certain angle in a fluorescent lamp or a dark dark room, the light at a specific angle causes internal reflection on the lens rib surface accommodated in the lens barrel.

This light is not related to image formation and causes flare or ghosting on the screen.

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

In particular, as the size of the portable terminal is reduced and thinned, the size reduction is also required apart from the performance improvement of the camera module, and in this situation, a new method for preventing flare or ghost phenomenon is required.

The present invention is to solve the above problems, to provide a lens assembly and a camera module capable of reducing flare or ghosting while maintaining the shape of the lens module.

A lens assembly according to an embodiment of the present invention includes a lens barrel in which a plurality of lenses are 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.

In addition, the camera module according to an embodiment of the present invention includes a lens barrel mounted on a housing, having a plurality of lenses sequentially stacked from an object side to an image side, and having a first marker for positioning; at least one spacer provided between the plurality of lenses, having a through hole through which light passes, and having a second marker at an edge for positioning; and an image sensor in which light passing through the plurality of lenses is formed and has a rectangular shape having a long side and a short side, wherein the through hole of the rectangular shape is arranged relative to the long side and the short side of the image sensor, and the first marker The second marker may be provided at a corresponding position.

The present invention can provide a lens assembly and a camera module in which flare or ghost phenomena are reduced by optimizing the shape and arrangement of simple components while minimizing changes in the external appearance 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 relationship of a lens assembly (lens barrel, lens, etc.) and an image sensor according to an embodiment of the present invention;
4 is an exploded perspective view (a) and a combined perspective view (b) showing 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 an exploded perspective view (a) and a combined perspective view (b) showing 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.

Objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In adding reference numerals to components of each drawing in this specification, it should be noted that the same components have the same numbers as much as possible, even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Hereinafter, preferred 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 inside the lens barrel 110, and spacers (eg, S1 to S5) may be disposed between the plurality of lenses. there is. That is, the lens assembly may be formed by including the lens barrel 110 and components 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 press-fitting or bonding using an adhesive. Alternatively, a plurality of lenses may be fixed by a press-fit ring supporting the last lens in the image-side direction. Further, the spacers S1 to S5 may be coupled to one surface of adjacent lenses or may be coupled to the lens barrel 110 with an edge.

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

With this structure, the light incident on the top of the lens barrel 110 passes through the lenses, passes through the optical filter 170, and is received by the image sensor 190 to take an image.

Here, the lens barrel 110 has a round shape as a whole, or a part of the outer surface is flatly cut at the bottom, that is, at the end of the lens barrel 110 toward the image side (towards the image sensor 150) to maximize space utilization. It may be equipped with a 'D' shaped decut (D-cut).

In addition, the plurality of lenses may be circular or decut lenses having a straight line having one side cut out.

This embodiment can be applied to all lens barrels having a plurality of lenses, and for convenience of description, a structure in which six lenses are provided will be described as an example (hereinafter, in order from the object side to the image side). 'first lens', 'second lens' ... 'sixth lens', etc. Spacers are also referred to in the same way).

In this embodiment, the lens barrel 110 may have a structure in which six lenses are provided, and all lenses may be circular lenses or all lenses may be decut lenses having straight lines at edges. Of course, some of the plurality of lenses may be circular lenses and others may be decut lenses. Also, spacers S1 to S5 may be provided between adjacent lenses. A spacer adjacent to the decut lens may have a decut corresponding to the decut lens or may be provided in a circular shape.

In this embodiment, in order to reduce the occurrence of flare or ghost due to light reflection, it is possible to block light from entering unnecessary areas in advance by spacers. It is provided in a rectangular shape, so that flare or ghost occurrence can be more effectively reduced.

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

(In this embodiment, for convenience of explanation, it is described as an example that the first spacer S1 adjacent to the first lens L1 is provided in a rectangular shape having short and long sides. Of course, this is one example And, the first spacer S1 may be provided in a round shape, and other spacers may also be provided in a square shape having a short side and a long side.)

When the rectangular through hole H is provided in at least one spacer (eg, S1) as in the present embodiment, the image sensor 150 of a rectangular shape having a short side LS and a long side LL is substantially matched. can be arranged relative to each other. 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 parallel to the long side of the image sensor 150. Of course, the through hole H and the center of the image sensor 150 may be aligned with the optical axis.

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

4 to 7 are first lenses (L1, 130-1, 130-2, 130-3, 130-4 and the first spacer (S1, 150-1, 150-2, 150-3, 150-4) is an exploded perspective view (a) and a combined perspective view showing the combined shape (b). In this embodiment, the spacer having the square through-holes (H, 151-1, 151-2, 151-3, and 151-4) may be any of the first to fifth spacers, and hereinafter, description is convenient. For this purpose, it will be described as an example that the through holes H, 151-1, 151-2, 151-3, and 151-4 of a rectangular shape are provided in the first spacer S1.

Referring to FIG. 4 , the lens barrel 110-1 of this embodiment includes a plurality of lenses L1 to L6 stacked therein, and spacers S1 to S5 are provided between the plurality of lenses L1 to L6. 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 through hole H and 151-1 through which light passes, and may have a rectangular shape having short and long sides.

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

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

Accordingly, in this embodiment, the through hole 151-1 of the first spacers S1 and 150-1, which is one of the spacers S1 to S5 disposed on the lens barrel 110-1, is connected to the image sensor 150. Contains structures that allow for relative placement (alignment).

First, a spacer 150-1 having a square through hole 151-1 has a structure in which a spacer 150-1 is coupled to one surface of adjacent lenses (in the illustration of FIG. 4, one surface of the first lens L1 In the case where the spacer 150-1 is coupled) and the first lens L1 is the decut lens 130-1 having the straight portion 135-1 at the edge, the decut lens 130-1 is the lens It is fitted into the first de-cut groove 115-1 of the barrel 110-1, and the spacer 150-1 is provided as a de-cut spacer 150-1 having a straight portion 153-1, and the de-cut spacer ( 150-1) may be fitted into the second de-cut groove 133-1 provided on one side of the de-cut lens 130-1.

In this way, in the decut spacer 150-1, the linear parts 153-1 and 135-1 are coupled to the decut lens 130-1 so as to have directivity parallel to each other (aligned), and the decut lens 130-1 ) is coupled to the lens barrel 110-1 to have a directionality, so eventually, the decut spacer 150-1 can be coupled to the lens barrel 110-1 so that the through hole 151-1 has a certain directionality. . Accordingly, the square-shaped through-hole 151-1 of the decut spacer 150-1 and the square-shaped image sensor 150 may be coupled to the housing 180 in a relative arrangement (alignment) so as to have a predetermined direction. there is.

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

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

Here, the rectangular through hole 151 - 2 may be disposed relative to (aligned with) the long and short sides of the image sensor 150 .

Accordingly, in this embodiment, the through hole 151-2 of the first spacer S1 or 150-2, which is one of the spacers S1 to S5 disposed on the lens barrel 110-2, is connected to the image sensor 150. Contains structures that allow for relative placement (alignment).

First, a spacer 150-2 having a square through hole 151-2 has a structure in which a spacer 150-2 is coupled to one surface of adjacent lenses (in the illustration of FIG. 5, one surface of the first lens L1 When 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 on its edge, the circular lens 130-2 2), the first marker 135-2 is fitted and coupled to the second marker 115-2 of the lens barrel 110-2, and the spacer 150-2 is the groove-shaped third marker 153-2 ) is provided as a marking spacer 150-2, and the marking spacer 150-2 has a fourth marker 133 having a projection shape in which the third marker 153-2 is provided on one side of the circular lens 130-2. -2) can be fitted and combined.

In this way, 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 have mutual orientation, and the circular lens 130-2 ) is that the first marker 135-2 and the second marker 115-2 are coupled to the lens barrel 110-2 to have mutual orientation, so eventually, the marking spacer 150-2 is formed through the through hole 151-2. 2) may be coupled to the lens barrel 110-2 to have a certain direction. Accordingly, the square through hole 151-2 of the marking spacer 150-2 and the square image sensor 150 may be coupled to the housing 180 in a relative arrangement (alignment).

Next, referring to FIG. 6, the lens barrel 110-3 of this embodiment has a plurality of lenses L1 to L6 stacked therein, and spacers S1 to L6 are provided between the plurality of 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 through hole H and 151-3 through which light passes, and may have a rectangular shape having a short side and a long side.

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

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

Accordingly, in this embodiment, the through hole 151-3 of the first spacers S1 and 150-3, which are one of the spacers S1 to S5 disposed on the lens barrel 110-3, is connected to the image sensor 150. Contains structures that allow for relative placement (alignment).

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

In this way, the linear portion 157-3 of the decut spacer 150-3 has directivity parallel to (aligned with) the straight portion of the third decut groove 117-3 of the lens barrel 110-3. Therefore, the decut spacer 150-3 may be coupled to the lens barrel 110-3 so that the through hole 151-3 has a certain direction. Accordingly, the square through hole 151-3 of the decut spacer 150-3 and the square image sensor 150 may be coupled to the housing 180 in a relative arrangement (alignment).

And, referring to FIG. 7, the lens barrel 110-4 of this embodiment has a plurality of lenses L1 to L6 stacked therein, and spacers S1 to S5 are provided between the plurality of lenses L1 to L6. ) may be provided. In addition, at least one of the plurality of spacers S1 to S5 (eg, S1 and 150-4) may have a through hole H and 151-4 through which light passes, having a short side and a long side, and may have a rectangular shape.

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

Here, the rectangular through-holes 151 - 4 may be arranged relative to (aligned with) the long and short sides of the image sensor 150 .

Accordingly, in this embodiment, the through hole 151-4 of the first spacer S1 or 150-4, which is one of the spacers S1 to S5 disposed on the lens barrel 110-4, is connected to the image sensor 150. Contains structures that allow for relative placement (alignment).

The edge of the spacer 150-4 having the square through hole 151-4 has a structure coupled to the lens barrel 110-4, and the spacer 150-4 has a groove-shaped fifth marker on the edge. In the case of the marking spacer 150-4 having (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 is It may be fitted and coupled correspondingly (aligned) with the sixth marker 117-4 of the lens barrel 110-4.

In this way, 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 (aligned) to have a directionality, the marking The spacer 150-4 may be coupled to the lens barrel 110-4 so that the through hole 151-4 has a certain direction. Accordingly, the square through hole 151-4 of the marking spacer 150-4 and the square image sensor 150 may be coupled to the housing 180 in a relative arrangement (alignment).

In the above, the configuration and characteristics of the present invention have been described based on the embodiments according to the present invention, but 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 is apparent to those skilled in the art, and therefore such changes or modifications are intended to fall within the scope of 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 in which 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;
The rectangular through hole corresponds to the long side and the short side of the image sensor, respectively,
The spacer is disposed relative to the lens barrel and fitted,
The spacer having the rectangular through hole is coupled to one side of any one of the adjacent lenses,
The lens to which the spacer having the rectangular through hole is coupled is a decut lens having a straight line portion at an edge,
The lens assembly of the decut lens in which a straight line part is coupled in parallel to a first de-cut groove having a straight part provided in the lens barrel.
delete delete delete According to claim 1,
The spacer having the rectangular through hole is a decut spacer having a straight portion on an edge,
The decut spacer is a lens assembly in which a straight line portion is coupled in parallel to a second decut groove having a straight portion provided on one surface of the decut lens.
a lens barrel in which 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;
The spacer having the rectangular through hole is coupled to one side of any one of the adjacent lenses,
The lens to which the spacer having the rectangular through hole is coupled is a marking lens having at least one first marker in the shape of a groove or protrusion on an edge,
The marking lens is a lens assembly in which the first marker is inserted into and coupled to at least one second marker having a protrusion or groove shape provided in the lens barrel.
According to claim 6,
The spacer having a rectangular through hole is a marking spacer having at least one third marker in the shape of a groove or protrusion on an edge,
The marking spacer is a lens assembly in which the third marker is inserted into and coupled to at least one fourth marker having a protrusion or groove shape provided on one surface of the marking lens.
delete According to claim 1,
The spacer having the rectangular through hole is a decut spacer having a straight portion on an edge,
The decut spacer is a lens assembly in which the straight parts are coupled in parallel to each other in a first decut groove having a straight part provided in the lens barrel.
According to claim 6,
The spacer having a rectangular through hole is a marking spacer having at least one fifth marker in the shape of a groove or protrusion on an edge,
The marking spacer is a lens assembly in which the fifth marker is inserted into and coupled to at least one sixth marker having a protrusion or groove shape provided in the lens barrel.
According to claim 1,
The through-hole and the image sensor have the same ratio of long sides and short sides of the lens assembly.
a lens barrel mounted on a housing, having a plurality of lenses sequentially stacked from an object side to an image side, and having a first marker for positioning;
at least one spacer provided between the plurality of lenses, having a through hole through which light passes, and having a second marker at an edge for positioning; and
An image sensor in which the light passing through the plurality of lenses is formed and has a rectangular shape having a long side and a short side;
The camera module of claim 1 , wherein the rectangular through-hole is provided at a position where the first marker and the second marker correspond to each other such that the long side and the short side of the image sensor are disposed relative to each other.

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