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KR100771364B1 - Camera module - Google Patents

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KR100771364B1
KR100771364B1 KR1020060079487A KR20060079487A KR100771364B1 KR 100771364 B1 KR100771364 B1 KR 100771364B1 KR 1020060079487 A KR1020060079487 A KR 1020060079487A KR 20060079487 A KR20060079487 A KR 20060079487A KR 100771364 B1 KR100771364 B1 KR 100771364B1
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camera module
image sensor
lens unit
infrared
blue filter
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정혜정
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엘지이노텍 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50Constructional details
    • H04N23/55Optical parts specially adapted for electronic image sensors; Mounting thereof
    • GPHYSICS
    • G12INSTRUMENT DETAILS
    • G12BCONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B17/00Screening
    • G12B17/04Screening from visible, ultraviolet, or infrared light
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50Constructional details
    • H04N23/54Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Devices (AREA)
  • Solid State Image Pick-Up Elements (AREA)

Abstract

블루필터 재질의 렌즈가 구비된 카메라 모듈이 제공된다. 본 발명의 카메라 모듈은 적외선 차단 기능이 있는 블루 필터 재질로 되어 있는 다수의 렌즈를 포함하는 렌즈부, 상기 렌즈부를 통해 입사되는 빛을 전기적 신호로 변환하기 위한 이미지센서, 상기 이미지센서에 의해 출력되는 신호를 디지털 처리하기 위한 인쇄회로기판, 상기 렌즈부 및 이미지센서를 수용하기 위한 하우징을 포함한다. 본 발명에 의하면 카메라 모듈에서 적외선차단기능이 있는 블루필터 재질의 렌즈를 사용하여 적외선필터를 제거함으로써, 크기를 축소할 수 있다는 효과가 있다. 이에 따라, 최근 카메라 모듈이 구비되는 이동통신단말기의 슬림화 경향에 부응할 수 있게 되는 장점이 있다. Provided is a camera module having a blue filter lens. The camera module of the present invention includes a lens unit including a plurality of lenses made of a blue filter material having an infrared blocking function, an image sensor for converting light incident through the lens unit into an electrical signal, and outputted by the image sensor. And a housing for accommodating the printed circuit board for processing the signal, the lens unit, and the image sensor. According to the present invention, the size of the camera module can be reduced by removing the infrared filter using a lens of a blue filter material having an infrared blocking function. Accordingly, there is an advantage that can meet the recent trend of slimming the mobile communication terminal equipped with a camera module.

Description

카메라 모듈 {Camera module}Camera module {Camera module}

도 1은 종래 카메라 모듈의 단면도이다.1 is a cross-sectional view of a conventional camera module.

도 2는 본 발명의 일 실시예에 따른 카메라 모듈의 단면도이다.2 is a cross-sectional view of a camera module according to an embodiment of the present invention.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

110 렌즈부 120 이미지센서110 Lens 120 Image Sensor

130 인쇄회로기판 140 하우징130 Printed Circuit Board 140 Housing

본 발명은 카메라 모듈에 관한 것이다. The present invention relates to a camera module.

도 1은 종래 카메라 모듈의 단면도이다. 도 1에서 보는 바와 같이, 종래 카메라 모듈은 복수 개의 렌즈로 이루어진 렌즈부(10), 적외선필터(20), 이미지센서(30), 인쇄회로기판(40), 하우징(50)으로 구성되어 있다. 이렇게 구성된 종래 카메라 모듈에서는 피사체의 광이미지를 렌즈부(10)가 수광하고, 적외선필터(20)는 수광된 광이미지에서 적외선을 차단하고, 이미지센서(30)는 조사된 광이미지를 전 기적인 신호로 변환하여 출력하게 된다. 1 is a cross-sectional view of a conventional camera module. As shown in FIG. 1, the conventional camera module includes a lens unit 10, an infrared filter 20, an image sensor 30, a printed circuit board 40, and a housing 50 formed of a plurality of lenses. In the conventional camera module configured as described above, the lens unit 10 receives the optical image of the subject, the infrared filter 20 blocks the infrared light from the received optical image, and the image sensor 30 transmits the irradiated optical image to the electric image. The signal is converted and output.

종래 카메라 모듈에서 이미지센서(30)는 인간의 눈으로는 보이지 않는 적외선 영역의 빛에 대해서도 반응하는 특성이 있기 때문에 그러한 영역의 눈에 보이지 않는 광선을 걸러내야 화이트 밸런스 등의 화질 조정에 문제가 발생하지 않게 된다. 이러한 이유로 카메라 모듈에는 적외선을 제거하기 위한 적외선필터(20)가 필요하다. In the conventional camera module, since the image sensor 30 is responsive to light in an infrared region that is invisible to the human eye, it is necessary to filter out invisible rays in such an area, which causes problems in image quality adjustment such as white balance. You will not. For this reason, the infrared ray filter 20 for removing infrared rays is needed for a camera module.

종래 적외선필터(20)는 적외선 영역의 투과율은 낮추고 반사율은 높여서 이미지센서(30)를 보호하고, 사람이 인식하는 가시광선 영역에서의 투과율은 높여서 이미지센서(30)에서 선명한 상을 얻을 수 있도록 제작된다. 그러나, 도 1에서 보는 바와 같이 종래 카메라모듈은 적외선필터(20)가 이미지센서(30)의 외부에 장착되는 방식으로 제작되어서 카메라 모듈의 크기를 소형화하는데 한계가 있다는 문제점이 있다. 또한, 적외선필터(20)를 이미지센서(30)의 외곽에 장착하는 방식은 적외선필터(20)의 장착비용과, 재료비 등이 소요되기 때문에 카메라모듈의 제조비용을 낮출 수 없다는 문제점이 있다.The conventional infrared filter 20 is designed to protect the image sensor 30 by lowering the transmittance of the infrared region and increasing the reflectance, and to obtain a clear image from the image sensor 30 by increasing the transmittance in the visible light region recognized by a person. do. However, as shown in FIG. 1, the conventional camera module has a problem in that the infrared filter 20 is manufactured in a manner that is mounted on the outside of the image sensor 30 to limit the size of the camera module. In addition, the method of mounting the infrared filter 20 on the outside of the image sensor 30 has a problem in that the manufacturing cost of the camera module cannot be lowered because the mounting cost and material cost of the infrared filter 20 are required.

본 발명은 상기 문제를 해결하기 위해 안출된 것으로서, 적외선차단기능이 있는 블루필터 재질의 렌즈를 사용하여 적외선필터를 제거함으로써, 크기를 소형화할 수 있는 카메라 모듈을 제공하는데 그 목적이 있다. The present invention has been made to solve the above problems, and an object of the present invention is to provide a camera module that can be reduced in size by removing the infrared filter using a lens of a blue filter material having an infrared blocking function.

또한, 본 발명의 다른 목적은 적외선필터를 장착하는 비용, 적외선필터의 재 료비를 절감하여서 제작비용을 낮출 수 있도록 하는 카메라 모듈을 제공하는 것이다.In addition, another object of the present invention is to provide a camera module to reduce the manufacturing cost by reducing the cost of mounting the infrared filter, the material cost of the infrared filter.

또한, 본 발명의 다른 목적은 적외선 필터를 장착하는 과정 중에 발생할 수 있는 이물문제를 개선하여, 수율을 높일 수 있도록 하는 카메라 모듈을 제공하는 것이다. In addition, another object of the present invention is to provide a camera module that can improve the yield by improving the foreign matters that may occur during the process of mounting the infrared filter.

이와 같은 목적을 달성하기 위한 본 발명의 카메라 모듈은 적외선 차단 기능이 있는 블루 필터 재질로 되어 있는 다수의 렌즈를 포함하는 렌즈부, 상기 렌즈부를 통해 입사되는 빛을 전기적 신호로 변환하기 위한 이미지센서, 상기 이미지센서에 의해 출력되는 신호를 디지털 처리하기 위한 인쇄회로기판, 상기 렌즈부 및 이미지센서를 수용하기 위한 하우징을 포함한다. 이때, 상기 블루 필터 재질에는 인산 유리(Phosphoric acid glass)가 포함될 수 있다.The camera module of the present invention for achieving the above object comprises a lens unit including a plurality of lenses made of a blue filter material having an infrared blocking function, an image sensor for converting light incident through the lens unit into an electrical signal, It includes a printed circuit board for digitally processing the signal output by the image sensor, the lens unit and a housing for accommodating the image sensor. In this case, the blue filter material may include phosphate glass.

이하, 첨부된 도면을 참조해서 본 발명의 실시예를 상세히 설명하면 다음과 같다. 우선 각 도면의 구성 요소들에 참조 부호를 부가함에 있어서, 동일한 구성 요소들에 한해서는 비록 다른 도면상에 표시되더라도 가능한 한 동일한 부호를 가지도록 하고 있음에 유의해야 한다. 그리고, 본 발명을 설명함에 있어서, 관련된 공지 기능 혹은 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

도 2는 본 발명의 일 실시예에 따른 카메라 모듈의 단면도이다. 본 발명의 카메라 모듈은 렌즈부(110), 이미지센서(120), 인쇄회로기판(130), 하우징(140)을 포함하여 이루어진다.2 is a cross-sectional view of a camera module according to an embodiment of the present invention. The camera module of the present invention includes a lens unit 110, an image sensor 120, a printed circuit board 130, and a housing 140.

렌즈부(110)는 적외선 차단 기능이 있는 블루 필터 재질로 되어 있는 다수의 렌즈를 포함하여 이루어진다. 도 2에서는 2개의 렌즈가 렌즈부(110)에 구비된 실시예이다. 렌즈부(110)는 빛을 모으거나 발산시켜 광학적 상을 맺히게 하는 역할을 하며, 볼록렌즈와 오목렌즈가 조합되어 구비될 수 있다. The lens unit 110 includes a plurality of lenses made of a blue filter material having an infrared blocking function. In FIG. 2, two lenses are provided in the lens unit 110. The lens unit 110 serves to form an optical image by collecting or diverging light, and a convex lens and a concave lens may be provided in combination.

본 발명에서 렌즈부(110)는 블루 필터(Blue Filter) 재질로 되어 있다. 블루 필터는 적외선 필터의 한 종류로서, 기존의 적외선 필터와는 달리 흡수 필터의 성질이 있기 때문에 별도의 코팅을 하지 않아도 그 자체로 적외선 필터의 역할을 하게 된다. 본 발명의 일 실시예에서 블루 필터 재질에는 인산 유리(Phosphoric acid glass)가 포함될 수 있다. In the present invention, the lens unit 110 is made of a blue filter material. Blue filter is a kind of infrared filter, unlike the existing infrared filter, because of the nature of the absorption filter, it does not need a separate coating itself serves as an infrared filter. In one embodiment of the present invention, the blue filter material may include phosphate glass.

이미지센서(120)는 렌즈부(110)를 통해 입사되는 빛을 전기적 신호로 변환하는 역할을 한다. 본 발명의 일 실시예에서 이미지센서(120)는 다수의 화소로 구성된 화소영역과, 화소영역의 입출력 단자인 다수의 전극으로 구성될 수 있다. 이때, 다수의 전극은 각각 와이어 본딩(wire bonding) 장비를 이용하여 인쇄회로기판(130)의 전극과 전기적으로 연결된다.The image sensor 120 converts light incident through the lens unit 110 into an electrical signal. In one embodiment of the present invention, the image sensor 120 may include a pixel area composed of a plurality of pixels and a plurality of electrodes serving as input / output terminals of the pixel area. In this case, the plurality of electrodes are electrically connected to the electrodes of the printed circuit board 130 using wire bonding equipment.

인쇄회로기판(130)은 소정의 전기적인 패턴과 다수의 전극이 구비되어 있으며, 이미지센서(120)에 의해 출력되는 신호를 디지털 처리하는 역할을 한다. The printed circuit board 130 is provided with a predetermined electrical pattern and a plurality of electrodes, and serves to digitally process a signal output by the image sensor 120.

하우징(140)은 렌즈부(110) 및 이미지센서(120)를 포함하여 수용할 수 있도 록 되어 있다. The housing 140 is configured to accommodate the lens unit 110 and the image sensor 120.

본 발명은 카메라 모듈에서 렌즈부(110)의 렌즈 재질에 블루 필터 재질을 사용함으로써, 별도의 적외선 필터를 장착하지 않는다. 따라서, 카메라 모듈의 크기를 축소시킬 수 있으므로, 최근 이동통신단말기의 슬림화 추세에 부응할 수 있게 된다. 또한, 적외선 필터를 제거함에 따라 적외선 필터의 재료비와, 적외선 필터의 장착비용 등의 제작비용을 절감할 수 있다. 또한, 적외선 필터를 장착하는 과정 중에 발생할 수 있는 이물문제가 없기 때문에, 카메라 모듈 제작 과정에서의 수율을 높일 수 있는 장점이 있다. The present invention does not mount a separate infrared filter by using a blue filter material in the lens material of the lens unit 110 in the camera module. Therefore, since the size of the camera module can be reduced, it is possible to meet the recent trend of slimming the mobile communication terminal. In addition, by removing the infrared filter, the manufacturing cost such as the material cost of the infrared filter and the mounting cost of the infrared filter can be reduced. In addition, there is no foreign matter that may occur during the mounting of the infrared filter, there is an advantage that can increase the yield in the manufacturing process of the camera module.

이상 본 발명을 몇 가지 바람직한 실시예를 사용하여 설명하였으나, 이들 실시예는 예시적인 것이며 한정적인 것이 아니다. 본 발명이 속하는 기술분야에서 통상의 지식을 지닌 자라면 본 발명의 사상과 첨부된 특허청구범위에 제시된 권리범위에서 벗어나지 않으면서 다양한 변화와 수정을 가할 수 있음을 이해할 것이다. While the invention has been described using some preferred embodiments, these embodiments are illustrative and not restrictive. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the invention and the scope of the rights set forth in the appended claims.

이상에서 설명한 바와 같이, 본 발명에 의하면 카메라 모듈에서 적외선차단기능이 있는 블루필터 재질의 렌즈를 사용하여 적외선필터를 제거함으로써, 크기를 축소할 수 있다는 효과가 있다. 이에 따라, 최근 카메라 모듈이 구비되는 이동통신단말기의 슬림화 경향에 부응할 수 있게 되는 장점이 있다. As described above, according to the present invention, the size of the camera module can be reduced by removing the infrared filter by using the lens of the blue filter material having the infrared blocking function. Accordingly, there is an advantage that can meet the recent trend of slimming the mobile communication terminal equipped with a camera module.

또한, 별도의 적외선필터를 사용하지 않기 때문에, 적외선필터를 장착하는 비용, 적외선필터의 재료비용 등을 절감하여서 카메라 모듈의 제작비용을 낮출 수 있다는 효과가 있다. In addition, since the separate infrared filter is not used, the manufacturing cost of the camera module can be lowered by reducing the cost of installing the infrared filter, the material cost of the infrared filter, and the like.

또한, 적외선필터를 장착하는 과정 중에 발생할 수 있는 이물문제가 없기 때문에, 카메라 모듈 제작 과정에서의 수율을 높일 수 있는 장점이 있다. In addition, there is no foreign matter that may occur during the process of mounting the infrared filter, there is an advantage that can increase the yield in the manufacturing process of the camera module.

Claims (2)

적외선 차단 기능이 있는 블루 필터 재질로 되어 있는 다수의 렌즈를 포함하는 렌즈부;A lens unit including a plurality of lenses made of a blue filter material having an infrared blocking function; 상기 렌즈부를 통해 입사되는 빛을 전기적 신호로 변환하기 위한 이미지센서;An image sensor for converting light incident through the lens unit into an electrical signal; 상기 이미지센서에 의해 출력되는 신호를 디지털 처리하기 위한 인쇄회로기판;A printed circuit board for digitally processing a signal output by the image sensor; 상기 렌즈부 및 이미지센서를 수용하기 위한 하우징Housing for accommodating the lens unit and the image sensor 을 포함하는 카메라 모듈.Camera module comprising a. 제1항에 있어서,The method of claim 1, 상기 블루 필터 재질에는 인산 유리(Phosphoric acid glass)가 포함되는 것을 특징으로 하는 카메라 모듈.The blue filter material comprises a phosphate glass (Phosphoric acid glass).
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