KR102211952B1 - 3D Camera Module - Google Patents

Abstract

A 3D camera module according to an embodiment of the present invention includes a printed circuit board on which an image sensor is mounted; A holder member connected to the printed circuit board to form a body of the camera module; First and second lens units disposed inside the holder member and configured of the same number of lenses; And a third lens unit disposed between the first and second lens units to receive light incident from the first and second lens units and transmit the received light to the image sensor.

Description

3D Camera Module {3D Camera Module}

The present invention relates to a 3D camera module.

BACKGROUND ART In recent years, the demand for small camera modules is increasing for various multimedia fields such as tablet computers, camera phones, PDAs, smart phones, toys, etc., and also for image input devices such as information terminals of surveillance cameras and video tape recorders. In particular, smart phones are in the trend of developing small-sized camera modules in response to increasing demand from consumers who prefer miniaturized designs.

Such a camera module is manufactured using a CCD or CMOS image sensor chip, and by condensing an object through a lens on the image sensor chip, converting an optical signal into an electric signal, and displaying the object on a display medium such as an LCD display device. Deliver the video so that

Recently, interest in a 3D camera module capable of providing a 3D image to obtain a more realistic image is increasing. The 3D camera module may be configured to implement a 3D image by taking and overlaying the left and right images. Korean Patent Publication No. 2012-0011618 discloses a general configuration of a 3D camera module. In general, in the 3D camera module, camera modules of the same spec may be disposed in a state spaced apart by a predetermined distance so that two camera modules form a pair, such as a human eye.

However, if a 3D camera module is formed by combining two camera modules of the same shape as a pair, the price is higher than that of the existing camera module, and the two camera modules must be arranged at a certain distance, so the installation space of the camera module It can also increase by more than 2 times.

In particular, since the two camera modules need to be managed for mechanical tilt and shift, there is also a problem that the yield is low and the defect rate is relatively high when the camera module is manufactured.

Republic of Korea Patent Publication No. 10-2012-0011618 (2012.02.08.) Republic of Korea Patent Publication No. 10-2012-0062996 (2012.06.15.)

An object of the present invention is to provide a 3D camera module with an improved structure so that the number of parts can be significantly reduced.

A 3D camera module according to an embodiment of the present invention includes a printed circuit board on which an image sensor is mounted; A holder member connected to the printed circuit board to form a body of the camera module; First and second lens units disposed inside the holder member and configured of the same number of lenses; And a third lens unit disposed between the first and second lens units to receive light incident from the first and second lens units and transmit the received light to the image sensor.

The first lens unit includes a first uppermost lens; At least one first middle lens disposed under the first uppermost lens; And a first mirror lens disposed below the first middle lens.

The second lens unit may include a second uppermost lens; At least one second middle lens disposed under the second uppermost lens; And a second mirror lens disposed below the second middle lens.

The third lens unit includes a third mirror lens; At least one third middle lens disposed under the third mirror lens; And a fourth middle lens disposed under the third middle lens.

Components constituting the first to third lens units may be disposed to be symmetrical to each other at the same height.

The first uppermost lens of the first lens unit, the second uppermost lens of the second lens unit, and the third mirror lens of the third lens unit are disposed at the same height from the bottom surface, and the first middle lens and the first middle lens of the first lens unit The second middle lens of the second lens unit and the third middle lens of the third lens unit are disposed at the same height from the bottom surface, and the first mirror lens of the first lens unit and the second mirror lens of the second lens unit and the third The fourth middle lens of the lens unit may be disposed at the same height from the bottom surface.

The first and second uppermost lenses and the first and second middle lenses have the same refractive index, the first and second mirror lenses have the same reflection angle, and reflected light may be imaged on the third mirror lens.

An infrared cut filter may be disposed in a space between the lower side of the first and second mirror lenses and the fourth middle lens and the upper side of the image sensor.

Since it can be manufactured in a small volume compared to the existing 3D camera module, it can be installed in a narrow space.

In addition, since a pair of lens modules are arranged inside one camera module, lenses that perform common functions using a plurality of mirrors can be shared, the number of lenses used can be reduced, thereby reducing the manufacturing cost. You can save.

In addition, since the number of lenses constituting the first and second lens modules can be reduced, the height of the camera module can be lowered to reduce the size.

1 is a perspective view schematically showing the configuration of a 3D camera module according to an embodiment of the present invention, and,
2 is a schematic cross-sectional view of a 3D camera module according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view schematically showing a configuration of a 3D camera module according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of a 3D camera module according to an embodiment of the present invention.

1, the 3D camera module according to an embodiment of the present invention may include a printed circuit board 10 and a holder member 20, and the holder member 20 includes first and second 2 Lens holes 21 and 22 may be formed so that an image can enter through two paths. The first and second uppermost lenses 110 and 210 of the first and second lens units 100 and 200 (see FIG. 2) to be described later through the first and second lens holes 21 and 22 It can be exposed.

2 is a diagram schematically illustrating an example of a 3D camera module according to an embodiment of the present invention.

The image sensor 11 may be mounted on the printed circuit board 10 approximately near the center, and the infrared cut filter 12 may be disposed above the image sensor 11.

As shown in FIG. 2, the infrared cut filter 12 may be formed larger than the size of the image sensor 11, and may be installed on a base member (not shown) having a separate window member.

As shown, the holder member 20 forms a body of a 3D camera module according to an embodiment of the present invention, and a plurality of lens units may be installed therein. According to an embodiment of the present invention, the first to third lens units 100, 200, and 300 may be provided, and the first and second lens units 100 and 200 have the same lens configuration and specifications. It can be formed to have.

The first lens unit 100 may include a first uppermost lens 110 and a first middle lens 120 as shown, and a first mirror lens M1 under the first middle lens 120 Can be installed. In this case, the first uppermost lens 110 may be disposed in a region I having a first height from the bottom surface, and the first middle lens 120 may be disposed in a region II having a second height from the bottom surface. , The first mirror lens M1 may be disposed in a region III having a third height from the bottom surface. In this case, a reference point for determining the first to third heights is the center reference of the first uppermost lens 110, the first middle lens 120, and the first mirror lens M1.

The second lens unit 200 may include a second uppermost lens 210 and a second middle lens 220 as shown, and a second mirror lens M2 under the second middle lens 220 Can be installed. In this case, the second uppermost lens 210 may be disposed in a region I having a first height from the bottom surface, and the second middle lens 220 may be disposed in a region II having a second height from the bottom surface. , The second mirror lens M2 may be disposed in a region III having a third height from the bottom surface. In this case, the reference point for determining the first to third heights is the center reference of the second uppermost lens 210, the second middle lens 220, and the second mirror lens M2.

The third lens unit 300 is disposed between the first and second lens units 100 and 200, a third mirror lens M3 is disposed in the I area, and a third middle lens is disposed in the II area. 310 may be disposed, and the fourth middle lens 320 may be disposed in the III region.

Meanwhile, the first uppermost lens 110 and the second uppermost lens 210 and the third mirror lens M3, the first middle lens 120 and the second middle lens 220, the third middle lens 310, the third The first mirror lens M1, the second mirror lens M2, and the fourth middle lens 320 may be symmetrically disposed around the image sensor 11 at the same height.

Meanwhile, the infrared cut filter 12 may be disposed under the first and second mirror lenses M1 and M2 and the fourth middle lens 320, and the light that actually needs to cut off infrared rays is the fourth Since it is a surface facing the middle lens 320, the lower portions of the first and second mirror lenses M1 and M2 are formed as separate base members, and only at a position corresponding to the fourth middle lens 320 The infrared cut filter 12 may be installed there by forming a window.

Hereinafter, the operation of the 3D camera module according to an embodiment of the present invention will be described with reference to FIG. 2.

As illustrated, light including an image may simultaneously enter the first and second lens units 100 and 200 through the first and second uppermost lenses 110 and 210.

The incident light enters through the first and second uppermost lenses 110 and 210 and the first and second middle lenses 120 and 220, and is then transmitted from the first and second mirror lenses M1 and M2. At the same time, it is reflected toward the third mirror lens M3.

The reflected light may again enter the image sensor 11 after the infrared component is filtered by the infrared cut filter 12 through the third and fourth middle lenses 310 and 320. Light passed through the third and fourth middle lenses 310 and 320 and transmitted to the image sensor 11 may implement a three-dimensional image using a phase difference.

In this way, when the first to third mirror lenses M1, M2, and M3 are used, the height does not increase even if the number of lenses increases, unlike the existing 3D camera module requiring a plurality of image sensors. , Since a 3D image can be implemented with only one image sensor 11, the number of parts and manufacturing cost can be reduced.

In particular, the first and second lens units 100 and 200 share the third lens unit 300 consisting of the third and fourth middle lenses 310 and 320 and the third mirror lens M3 If the height between the lens components constituting each is kept constant, the height of the 3D camera module can also be lowered, which is advantageous for product miniaturization.

Meanwhile, in the above-described embodiment, a configuration in which the first to third lens units 100 and 200 have two lenses and one mirror lens has been described as an example, but the present invention is not limited thereto. The number of can be increased or decreased.

Embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those of ordinary skill in the technical field of the present invention can improve and change the technical idea of the present invention in various forms. Therefore, such improvements and changes will fall within the scope of the present invention as long as it is apparent to those of ordinary skill in the art.

10; Printed circuit board 11; Image sensor
12; Infrared cut filter 20; Holder member
100; A first lens unit 110; First top lens
120; A first middle lens 200; 2nd lens unit
210; A second top lens 220; 2nd middle lens
300; A third lens unit 310; 3rd middle lens
320; Fourth middle lens M1; First mirror lens
M2; A second mirror lens M3; 3rd mirror lens

Claims (10)

Holder member;
An image sensor disposed on the holder member;
First and second lens units disposed on the holder member;
A third lens unit disposed between the first lens unit and the second lens unit, and transmitting light incident from the first and second lens units to the image sensor,
The third lens unit overlaps the image sensor in the optical axis direction,
The third lens unit is disposed at the same height in the optical axis direction from the bottom surfaces of the first and second lens units and the holder member,
The first lens unit includes a first uppermost lens and a first mirror lens disposed below the first uppermost lens,
The second lens unit includes a second uppermost lens and a second mirror lens disposed under the second uppermost lens,
The third lens unit includes a third mirror lens and a fourth middle lens disposed under the third mirror lens,
Light passing through the first uppermost lens is sequentially reflected from the first mirror lens and the third mirror lens and passes through the fourth middle lens,
Light passing through the second uppermost lens is sequentially reflected from the second mirror lens and the third mirror lens and passes through the fourth middle lens,
The holder member includes an I region formed at a first height in the optical axis direction from the bottom surface of the holder member, an II region formed at a second height lower than the first height, and a third lower than the second height. It includes a III region formed in height
The first top lens, the second top lens, and the third mirror lens are disposed in the I area. delete delete The method of claim 1,
The first mirror lens, the second mirror lens, and the fourth middle lens are disposed in the III area. The method of claim 1,
The first lens unit includes a first middle lens disposed between the first uppermost lens and the first mirror lens,
The second lens unit includes a second middle lens disposed between the second uppermost lens and the second mirror lens,
The third lens unit is a 3D camera module including a third middle lens disposed between the third mirror lens and the fourth middle lens. The method of claim 5,
The first middle lens, the second middle lens, and the third middle lens are disposed in the II area. The method of claim 5,
The first and second uppermost lenses and the first and second middle lenses have the same refractive index,
The first and second mirror lenses have the same reflection angle 3D camera module.
The method of claim 1,
3D camera module comprising an infrared cut filter disposed in a space between the lower side of the first and second mirror lenses and the fourth middle lens and the upper side of the image sensor. The method of claim 1,
The third mirror lens is a 3D camera module that is disposed higher than the first mirror lens and the second mirror lens. The method of claim 1,
The first lens unit, the second lens unit, and the third lens unit have a height corresponding to each other.

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