KR101262571B1 - Carmera module - Google Patents

Abstract

A camera module is disclosed. The camera module includes a lens assembly including a plurality of lens portions having a polygonal outline; A lens barrel to receive the lens assembly; An infrared cut filter unit disposed in the lens barrel; A housing coupled with the lens barrel; And a sensor unit disposed in the housing, wherein the lens barrel includes a receiving groove formed at a lower portion thereof, and the receiving groove has a shape corresponding to the lens assembly and the infrared cut filter unit.

Description

Camera Module {CARMERA MODULE}

Embodiments relate to a camera module.

Currently, camera modules are installed in the production of automobiles and endoscopes, including mobile communication terminals, IT devices such as PDAs and MP3 players. At the same time, miniaturization and thinning are being progressed according to the mounting target, and various additional functions such as auto focusing (AF) and optical zoom (OPTICAL ZOOM) are being implemented at low cost.

In addition, the current camera module is equipped with an image sensor module manufactured in a wire bonding method (COB; Chip Of Board), flip chip method (COF; Chip Of Flexible) and chip scale package (CSP) It is mainly manufactured in the form of being connected to the main board through electrical connection means such as a printed circuit board (PCB) or a flexible printed circuit board (FPCB).

In recent years, however, a camera module has been demanded from a user that can be directly mounted on a main board as in a general passive device, thereby simplifying a manufacturing process and reducing manufacturing cost.

In such a camera module, an image sensor such as a CCD or a CMOS is mainly manufactured in a state of being attached to a substrate by a wire bonding or flip chip method. The data is stored on the image, and the stored data is converted into an electrical signal and displayed as an image on a display medium such as an LCD or a PC monitor in the device.

The conventional camera module includes a housing in which an image sensor for converting an image signal input through a lens into an electrical signal is supported on the bottom, a lens group for collecting an image signal of a subject in the image sensor, and the lens group stacked therein. It is constructed by the sequential joining of the barrels.

At this time, the lower part of the housing is electrically coupled to the mounting substrate (FPCB) attached to the capacitor and the chip component of the resistor for the electrical component for driving the image sensor consisting of CCD or CMOS.

In the conventional camera module configured as described above, an anisotropic conductive film (ACF) is inserted between the substrate and the image sensor in a state in which a plurality of circuit components are mounted on the mounting substrate (FPCB), and energized by applying heat and pressure. Adhesively fix and attach the infrared cut filter unit on the opposite side.

In addition, in the state where the barrel and the housing in which the plurality of lens groups are built are temporarily coupled by screwing, the previously assembled mounting substrate is adhesively fixed to the bottom of the housing by a separate adhesive agent.

On the other hand, after the adhesive fixing of the housing to which the mounting substrate and the barrel to which the image sensor is attached is fixed, the focus adjustment is performed by setting a subject (resolution chart) at a predetermined distance in front of the barrel. As the vertical feed amount by the rotation of the barrel screwed to the housing is adjusted, the focus is adjusted between the lens group and the image sensor.

Embodiments provide a camera module that can be easily manufactured.

The camera module according to the embodiment includes a lens assembly including a plurality of lens parts having a polygonal outline; A lens barrel to receive the lens assembly; An infrared cut filter unit disposed in the lens barrel; A housing coupled with the lens barrel; And a sensor unit disposed in the housing, wherein the lens barrel includes a receiving groove formed at a lower portion thereof, and the receiving groove has a shape corresponding to the lens assembly and the infrared cut filter unit.

The camera module according to the embodiment arranges the infrared cut filter in the lens barrel. In particular, the infrared cut filter unit is disposed in the lens barrel together with the lens assembly. In addition, the infrared cut filter unit may have a polygonal shape such as the lens assembly.

Accordingly, the infrared cut filter unit is coupled to the lens barrel together with the lens assembly. In this case, the infrared cut filter unit may be coupled to the lens barrel by a dot-shaped fixing unit. That is, the infrared cut filter unit may be easily coupled to the lens barrel by a dotting and curing process of the resin composition.

Therefore, the camera module according to the embodiment can be easily manufactured.

In addition, the infrared cut filter unit may have a polygonal shape such as the lens assembly. In particular, the infrared cut filter unit may have a square shape. Therefore, the infrared cut filter unit can be easily manufactured by a simple cutting process.

In addition, the infrared cut filter unit may have an outer shape substantially the same as the lens assembly. Accordingly, the infrared cut filter unit may be used to be optimized for the portion that requires infrared cut off. Therefore, the camera module according to the embodiment includes an infrared cut filter of a small size, it can be manufactured at a low cost.

1 is an exploded perspective view showing a camera module according to an embodiment.
2 is a perspective view illustrating a lower portion of the lens barrel.
3 is a perspective view illustrating a lens assembly coupled to a lens barrel.
4 is a cross-sectional view of a camera module according to an embodiment.
5 and 6 are cross-sectional views illustrating a process of manufacturing a lens assembly.

In the description of the embodiments, each lens, unit, part, hole, protrusion, groove or layer, etc., is placed on or under the "on" of each lens, unit, part, hole, protrusion, groove, or layer, etc. And " under " include both " directly " or " indirectly " through other components. . In addition, the upper or lower reference of each component is described with reference to the drawings. The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.

1 is an exploded perspective view showing a camera module according to an embodiment. 2 is a perspective view illustrating a lower portion of the lens barrel. 3 is a perspective view illustrating a lens assembly coupled to a lens barrel. 4 is a cross-sectional view of a camera module according to an embodiment. 5 and 6 are cross-sectional views illustrating a process of manufacturing a lens assembly.

1 to 6, the camera module according to the embodiment includes a lens barrel 100, a lens assembly 200, a fixing unit 300, a housing 400, an infrared cut filter unit 500, and a sensor unit ( 600).

The lens barrel 100 accommodates the lens assembly 200 and the infrared cut filter unit 500. The lens barrel 100 includes a receiving groove 120 for accommodating the lens assembly 200 and the infrared cut filter unit 500. The receiving groove 120 may have a shape corresponding to the lens assembly 200 and the infrared cut filter 500. The receiving groove 120 may have a polygonal shape when viewed from the bottom side. In more detail, the receiving groove 120 may have a square shape when viewed from the bottom side. That is, the outer periphery of the receiving groove 120 may have a square shape. In more detail, the receiving groove 120 may have a rectangular shape when viewed from the bottom side. In more detail, the receiving groove 120 when viewed from the bottom side may have a square shape.

The lens barrel 100 may have a cylindrical shape. That is, the outside of the lens barrel 100 may have a circular shape.

The lens barrel 100 may be combined with the housing 400. In more detail, the lens barrel 100 may be screwed with the housing 400. Male threads 110 may be formed on an outer circumferential surface of the lens barrel 100. The male screw portion 110 of the lens barrel 100 may be screwed with the female screw portion 410 of the housing 400. The gap between the lens assembly 200 and the sensor unit 600 may be adjusted by the male screw unit 110 and the female screw unit 410. That is, as the lens barrel 100 rotates, the distance between the lens assembly 200 and the sensor unit 600 may be adjusted. Accordingly, the position of the sensor unit 600 may be adjusted such that the sensor unit 600 is disposed at the focal length of the lens assembly 200. That is, by combining the lens barrel 100 and the housing 400, the focus of the lens assembly 200 and the sensor unit 600 may be adjusted.

In addition, the lens barrel 100 includes a light receiving groove opened upwards. The light incident groove exposes the lens assembly 200. An image is incident on the lens assembly 200 through the light incident groove.

The lens assembly 200 is disposed in the lens barrel 100. In more detail, the lens assembly 200 is disposed in the receiving groove 120. The lens assembly 200 is inserted into the receiving groove 120. The lens assembly 200 has a polygonal outer shape. In more detail, the lens assembly 200 may have a polygonal shape when viewed from the top side. In more detail, the lens assembly 200 may have a rectangular shape when viewed from the top side. In more detail, the lens assembly 200 may have a square shape when viewed from the top side.

The lens assembly 200 includes a plurality of lens units. For example, the lens assembly 200 may include a first lens unit 210, a second lens unit 220, and a third lens unit 230. The third lens unit 230, the second lens unit 220, and the first lens unit 210 are sequentially stacked.

The first lens unit 210 includes a first lens 211 and a first support 212. The first lens 211 includes a curved surface. The first support part 212 extends laterally from the first lens 211. The first lens 211 and the first support part 212 may be integrally formed. Guide grooves may be formed in the first support part 212 to fix the second lens part 220 to a desired position.

The second lens unit 220 is disposed below the first lens unit 210. The second lens unit 220 includes a second lens 221 and a second support 222. The second lens 221 includes a curved surface. The second support part 222 extends laterally from the second lens 221. The second lens 221 and the second support part 222 may be integrally formed. Guide grooves may be formed in the second support part 222 to fix the third lens part 230 to a desired position. In addition, a guide protrusion for fixing to the first lens unit 210 may be formed on an upper surface of the second support unit 222.

The third lens unit 230 is disposed below the second lens unit 220. The third lens unit 230 includes a third lens 231 and a third support part 232. The third lens 231 includes a curved surface. The third support part 232 extends laterally from the third lens 231. The third lens 231 and the third support part 232 may be integrally formed. A guide protrusion for fixing to the second lens unit 220 may be formed on an upper surface of the third support part 232.

In the above, the lens assembly 200 has been described as including three lens units, but is not limited thereto. That is, the lens assembly 200 may include one or two lens units or may include four or more lens units.

The lens assembly 200 may be formed by the following process.

Referring to FIG. 5, a plurality of lens array substrates 213, 223, and 233 are stacked in this order. The lens array substrates 213, 223, and 233 include a plurality of lenses. For example, the third lens array substrate 233, the second lens array substrate 223, and the first lens array substrate 213 are sequentially stacked.

Referring to FIG. 6, the first lens array substrate 213, the second lens array substrate 223, and the third lens array substrate 233 are cut while being stacked. Accordingly, the plurality of lens assemblies 200 may be formed at the same time. In addition, the lens assemblies 200 may have a rectangular shape when viewed from the top side.

That is, since the lens assembly 200 is formed by the lamination and cutting process, the lens assembly 200 may inevitably have a polygonal outer shape.

The infrared cut filter 500 is disposed in the lens barrel 100. In more detail, the infrared cut filter 500 is disposed below the lens assembly 200. The infrared cut filter 500 may be attached to the bottom surface of the lens assembly 200.

The infrared cut filter 500 may have a polygonal plate shape. The infrared cut filter 500 may have a polygonal outer shape. The infrared cut filter 500 may have a rectangular outer shape. The outer shape of the infrared cut filter unit 500 may correspond to the outer shape of the lens assembly 200.

In more detail, the infrared cut filter 500 may have a rectangular or square outer shape. The infrared cut filter 500 may be formed by a cutting process. That is, the infrared blocking material is coated on the transparent substrate, and then, the transparent substrate is cut into a rectangular or square shape to form the infrared blocking filter unit 500. Accordingly, the infrared cut filter 500 may be easily manufactured by a simple cutting process.

The infrared cut filter 500 filters the incident infrared light. The infrared cut filter 500 may block excessive long wavelengths of light flowing into the sensor 600.

The infrared cut filter 500 may be formed by alternately depositing titanium oxide and silicon oxide on the optical glass. In order to block infrared rays, the thickness of the titanium oxide and the silicon oxide may be appropriately adjusted.

The fixing part 300 fixes the lens assembly 200 and the infrared cut filter 500 to the lens barrel 100. The fixing part 300 may be attached to the lens barrel 100 and the infrared cut filter 500. In more detail, the fixing part 300 may be attached to the lower surface of the lens barrel 100 and the lower surface of the infrared cut filter 500. In more detail, the fixing part 300 may be directly attached to the lower surface of the lens barrel 100 and the lower surface of the infrared cut filter unit 500.

The fixing part 300 may have a dot shape. In more detail, the fixing part 300 may be a plurality of dots, and may be spaced apart from each other. The fixing part 300 may be disposed at an edge portion of the bottom surface of the infrared cut filter 500.

As the material used as the fixing part 300, a polymer having high adhesion, such as an epoxy resin, may be used. The fixing part 300 is attached only to the outer portion of the infrared cut filter 500.

In addition, since the fixing part 300 has a dot shape, the lens assembly 200 and the infrared cut filter part 500 may be easily fixed to the lens barrel 100 by a simple process. That is, after the resin composition is doped in the area between the lens assembly 200 and the lens barrel 100, the resin composition is cured. Accordingly, the fixing part 300 can be formed by a simple process.

The housing 400 accommodates the sensor unit 600. The housing 400 is coupled to the lens barrel 100. In more detail, the housing 400 is screwed with the lens barrel 100. As described above, the female screw portion 410 of the housing 400 is lens-coupled with the male screw portion 110 of the lens barrel 100.

The housing 400 may be formed of plastic. The housing 400 may have a circular cylindrical shape. In addition, the housing 400 includes an accommodation groove 430 for accommodating the sensor unit 600.

The sensor unit 600 is accommodated in the housing 400. The sensor unit 600 includes a CCD image sensor or a CMOS image sensor. In addition, the sensor unit 600 further includes a circuit board connected to the image sensor. The sensor unit 600 converts an incident image into an electrical signal.

As described above, the camera module according to the embodiment inserts the lens assembly 200 and the infrared cut filter 500 in the receiving groove 120, by using the fixing part 300, the lens The assembly 200 and the infrared cut filter unit 500 may be fixed to the lens barrel 100.

In particular, the lens assembly 200 and the infrared cut filter 500 may have a polygonal shape, more specifically, a square shape, and the receiving groove 120 may also have a square shape. In addition, the lens barrel 100 may have a circular outer shape. The fixing part 300 may have a dot shape.

Accordingly, the camera module according to the embodiment may combine the lens assembly 200 and the infrared cut filter unit 500 having a polygonal shape to the lens barrel 100 of the cylindrical structure using the fixing unit 300 in a simple structure. have. That is, the camera module according to the embodiment may have a small size.

In addition, the camera module according to the embodiment arranges the infrared cut filter 500 in the lens barrel 100. In particular, the infrared cut filter 500 is disposed in the lens barrel 100 together with the lens assembly 200. In addition, the infrared cut filter 500 may have the same polygonal shape as the lens assembly 200.

Accordingly, the infrared cut filter 500 is coupled to the lens barrel 100 together with the lens assembly 200. In this case, the infrared cut filter 500 may be coupled to the lens barrel 100 by a dot-shaped fixing part 300. That is, the infrared cut filter 500 may be easily coupled to the lens barrel 100 by a dotting and curing process of the resin composition.

That is, the fixing part 300 may have a dot shape by a simple process such as resin composition dotting and curing. Therefore, the lens assembly 200 and the infrared cut filter 500 may be easily coupled to the lens barrel 100 by the fixing part 300.

Therefore, the camera module according to the embodiment can be easily manufactured.

In addition, the infrared cut filter 500 may have the same polygonal shape as the lens assembly 200. In particular, the infrared cut filter 500 may have a square shape. Therefore, the infrared cut filter 500 may be easily manufactured by a simple cutting process.

In addition, the infrared cut filter 500 may have an outer shape substantially the same as the lens assembly 200. Accordingly, the infrared cut filter 500 may be optimized and used in a portion that requires infrared cut off. Therefore, the camera module according to the embodiment includes an infrared cut filter 500 of a small size, it can be manufactured at a low cost.

In addition, a plurality of rectangular lens assemblies 200 may be manufactured in a substrate form, cut, and easily manufactured in large quantities. Therefore, the camera module according to the embodiment can be easily manufactured.

In addition, the features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, and the like illustrated in the embodiments may be combined or modified with respect to other embodiments by those skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims (8)

A lens assembly including a plurality of lens parts having a polygonal outline;
A lens barrel to receive the lens assembly;
An infrared cut filter unit disposed in the lens barrel;
A housing coupled with the lens barrel; And
A sensor unit disposed in the housing,
The lens barrel has a receiving groove formed at the bottom,
The receiving groove has a shape corresponding to the lens assembly and the infrared cut filter unit,
Fixing the infrared cut filter portion to the lens barrel, the camera module further comprises a fixing portion adhered to the lower surface of the lens barrel and the infrared cut filter. delete delete The method of claim 1, wherein the first screw portion is formed on the outer peripheral surface of the lens barrel,
A second threaded portion of the housing is formed,
The first screw unit is coupled to the second screw module. The method of claim 1, wherein the infrared cut filter portion has a rectangular plate shape,
The receiving groove is a camera module having a rectangular shape. The method of claim 1, wherein the lens unit
lens; And
A camera module integrally formed with the lens and extending from the lens and having a polygonal outline. The camera module of claim 1, wherein the fixing part has a dot shape and is disposed corresponding to an edge of the infrared cut filter part. The camera module of claim 1, wherein the infrared cut filter unit has an outer shape corresponding to the outer sides of the lens units.

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