KR20110124882A - Lens block and backlight unit having the same - Google Patents

Lens block and backlight unit having the same Download PDF

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Publication number
KR20110124882A
KR20110124882A KR1020100044318A KR20100044318A KR20110124882A KR 20110124882 A KR20110124882 A KR 20110124882A KR 1020100044318 A KR1020100044318 A KR 1020100044318A KR 20100044318 A KR20100044318 A KR 20100044318A KR 20110124882 A KR20110124882 A KR 20110124882A
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South Korea
Prior art keywords
lens
light
led package
lens block
led
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KR1020100044318A
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Korean (ko)
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송용욱
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희성전자 주식회사
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Priority to KR1020100044318A priority Critical patent/KR20110124882A/en
Publication of KR20110124882A publication Critical patent/KR20110124882A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

PURPOSE: A lens block and backlight device with the same are provided to reduce processing time and contact failure. CONSTITUTION: A lens block(10) includes a lens unit with a lens corresponding to a plurality of LEDs which is mounted on a substrate and a connecting unit which connects each lenses of the lens unit into one. The connection unit is comprised by being winded partially around a plurality of lenses of the lens unit.

Description

렌즈블록 및 이를 구비하는 백라이트 장치{Lens block and Backlight unit having the same}Lens block and backlight unit having same {Lens block and Backlight unit having the same}

본 발명은 렌즈블록 및 백라이트 장치에 관한 것으로, 더욱 상세하게는 복수의 광 확산 렌즈를 하나의 렌즈블록으로 일체화하여 LED 패키지의 상부에 배치시켜, LED 패키지의 광 지향각을 향상시킴과 동시에 렌즈블록의 조립성 및 생산성을 향상시킬 수 있는 구조의 렌즈블록 및 이를 구비하는 백라이트 장치에 관한 것이다.
The present invention relates to a lens block and a backlight device, and more particularly, a plurality of light diffusing lenses are integrated into one lens block and disposed on an upper portion of the LED package, thereby improving the light directing angle of the LED package and at the same time the lens block. The present invention relates to a lens block having a structure capable of improving assembly and productivity thereof, and a backlight device having the same.

노트북, 컴퓨터, 텔레비젼과 같은 중대형 기기의 모니터에 일반적으로 적용되는 액정표시장치(LCD; Liquid Crystal Display)는 그 자체가 비 발광성이므로 정보표시패널에 균일하게 빛을 조사하는 백라이트 장치가 필수적으로 요구된다.Liquid crystal displays (LCDs), which are generally applied to monitors of medium and large devices such as laptops, computers, and televisions, are non-luminescent in themselves, and thus a backlight device for uniformly irradiating light onto the information display panel is required. .

통상적으로, 액정표시장치에 채용되는 백라이트 장치는 광원의 위치에 따라 측면형(edgy type)과 직하형(direct type)의 백라이트 장치로 구분되는데, 측면형 백라이트 장치는 도광판의 측부에 광원이 배치되어 도광판 내부로 빛을 조사시키는 구조이고, 직하형 백라이트 장치는 확산판(또는 도광판)의 하부에 광원을 일렬로 배열시켜 도광판에 전면적으로 빛을 조사시키는 구조이다.In general, a backlight device employed in a liquid crystal display device is classified into an edgy type and a direct type backlight device according to the position of the light source. In the side type backlight device, a light source is disposed at a side of the light guide plate. The direct light backlight unit is configured to irradiate light into the light guide plate, and the direct type backlight device is configured to irradiate light on the light guide plate by arranging light sources in a row below the diffuser plate (or the light guide plate).

또한, 광원으로는 냉음극형광램프(CCFL:Cold Cathode Fluorescent Lamp)와 발광다이오드(light emission diode, 이하 'LED'라 함)가 주로 이용되지만, 최근에는 LED가 형광램프를 대체하는 추세이다.In addition, as a light source, Cold Cathode Fluorescent Lamps (CCFLs) and light emitting diodes (LEDs) are mainly used, but LEDs have recently replaced fluorescent lamps.

LED는 반도체의 p-n 접합 구조를 이용하여 전기적인 신호를 빛으로 변화시키는 소자로서, 다른 발광체에 비해 수명이 길고, 구동 전압이 낮으며, 소비 전력이 적다는 장점이 있다. 또한 다양한 색 구현이 가능하며, 고연색성, 안정성, 에너지 절약 등의 장점으로 그 적용범위가 상당히 많이 늘어나고 있다.LED is a device that converts an electrical signal into light using the p-n junction structure of the semiconductor, has the advantages of longer life, lower driving voltage, and lower power consumption than other light emitters. In addition, it is possible to realize a variety of colors, and the range of application is increasing considerably due to the advantages such as high color rendering, stability, and energy saving.

그러나, 보다 더 많은 분야에 사용되기 위해서는 광속(flux of light) 및 배광(light distribution)등의 특성에 있어서 개선이 필요하며, 특히 LED를 간접조명에 적용하기 위해서는 LED의 지향각이 중요한 문제가 되고 있다.However, in order to be used in more fields, improvement in characteristics such as flux of light and light distribution is needed. Especially, in order to apply LED to indirect lighting, the direct angle of LED becomes an important problem. have.

도 1은 종래의 기술에 따른 LED 패키지가 적용된 LED 모듈을 나타낸 사시도이다.1 is a perspective view showing an LED module to which the LED package according to the prior art is applied.

도면을 참조하면, LED 모듈(1)은 인쇄회로기판(2)과 인쇄회로기판(2) 상에 실장된 LED 패키지(3)로 구성되며, LED 패키지(3)는 LED 칩(4)이 실장된 LED 패키지 본체부(5)와 상기 LED 칩(4)을 밀봉하는 몰딩부(6)를 가지며, 이러한 LED 패키지(3)는 약 110~120°정도의 지향각을 나타낸다.Referring to the drawings, the LED module 1 includes a printed circuit board 2 and an LED package 3 mounted on the printed circuit board 2, and the LED package 3 is mounted with the LED chip 4. LED package body portion 5 and a molding portion 6 for sealing the LED chip 4, this LED package 3 has a direction angle of about 110 ~ 120 °.

LED 모듈에서 LED 패키지 사이의 간격이 넓어지면 광의 중첩량이 적어지게 되어 휘도와 휘도의 균일성이 감소한다. 이와 달리, LED 패키지 사이의 간격을 좁히면, 휘도와 휘도의 균일성을 향상시킬 수 있지만, 동일 면적의 백라이트 장치에 대하여 상대적으로 많은 수의 LED 패키지가 요구되어 제조 비용이 증가하는 문제점이 있다.In the LED module, a wider gap between the LED packages reduces the amount of overlap of light, thereby reducing the luminance and the uniformity of the luminance. On the other hand, narrowing the spacing between the LED packages can improve the brightness and uniformity of the brightness, but there is a problem that a relatively large number of LED packages are required for the backlight device of the same area, which increases the manufacturing cost.

즉, LED 패키지의 광 지향각은 백라이트 유닛의 휘도 특성을 개선하거나 제조 비용을 절감시키는데 있어서 중요한 요소가 되고 있다. 이러한 문제점을 해결하기 위하여 LED 패키지의 상측에 광 확산 렌즈를 부가하여, LED 패키지에서 출사되는 빛의 지향각을 향상시키고자 하는 방법이 알려져 있다. That is, the light directing angle of the LED package has become an important factor in improving the luminance characteristics of the backlight unit or reducing the manufacturing cost. In order to solve this problem, a method of adding a light diffusion lens on the upper side of the LED package and improving the directivity angle of the light emitted from the LED package is known.

도 2는 종래의 기술에 따라 광 지향각을 향상시키기 위한 렌즈를 적용한 LED 모듈을 나타낸 사시도이다.2 is a perspective view showing an LED module to which a lens for improving the light directing angle according to the prior art is applied.

도면을 참조하면, LED 모듈(1)은 LED 패키지(3)의 빛을 굴절시키는 역할을 하는 렌즈(7)를 더 구비한다. 이러한 LED 모듈(1)은 렌즈가 없는 LED 모듈에 비하여 LED 패키지(3)로부터 출사되는 빛의 지향각이 대략 20°정도 증가되어, 130~140°정도의 광 지향각을 나타낸다.Referring to the drawings, the LED module 1 further includes a lens 7 which serves to refracting the light of the LED package 3. The LED module 1 has a light directivity angle of about 20 ° increased from the LED package 3 as compared to an LED module without a lens, indicating a light directivity angle of about 130 to 140 °.

이러한 광 확산 렌즈(7)는 LED 패키지(3)를 상측에서 덮으면서 체결되는데, 종래의 기술에 따른 LED 모듈(1)에서는 하나의 LED 패키지(3)에 대하여 하나의 렌즈(7)가 각각 대응하여 체결된다.The light diffusing lens 7 is fastened while covering the LED package 3 from above. In the LED module 1 according to the related art, one lens 7 corresponds to one LED package 3, respectively. Is tightened.

상기와 같은 구조에서는 복수개의 LED 패키지에 대하여 각각 렌즈를 하나씩 체결하여야 하므로, 체결 공정이 까다롭고 많은 시간이 요구되는 문제점이 있다. 또한, 각 렌즈를 하나씩 처리하여야 하므로, 관리의 어려움과 함께 체결시 불량이 발생할 우려가 많은 문제점이 있다.
In the above structure, since one lens must be fastened to each of the plurality of LED packages, the fastening process is difficult and requires a lot of time. In addition, since each lens has to be processed one by one, there are many problems in that a defect may occur when tightening together with difficulty of management.

본 발명은 상기와 같은 문제점들을 해결하기 위하여 제안된 것으로, 복수의 LED들을 일체로 쉽고 용이하게 탈착시킬 수 있는 렌즈블록을 제공하는 것을 목적으로 한다.The present invention has been proposed to solve the above problems, and an object of the present invention is to provide a lens block capable of easily and easily detaching a plurality of LEDs integrally.

본 발명의 다른 목적은 LED 패키지를 광원으로 하는 직하형 백라이트 장치에 있어서, LED 패키지의 광 지향각을 향상시키기 위한 렌즈를 복수개 단위로 블록화함으로써, 부품 수를 감소시킬 수 있으며, 렌즈 체결 공정을 단순화시키고, 공정 시간 및 체결 불량을 감소시킬 수 있는 백라이트 장치를 제공하는 것을 목적으로 한다.
Another object of the present invention is a direct type backlight device using a LED package as a light source, by blocking the number of lenses to improve the light directivity of the LED package in a plurality of units, the number of parts can be reduced, simplifying the lens fastening process It is an object of the present invention to provide a backlight device capable of reducing the process time and the fastening failure.

상기와 같은 목적을 달성하기 위한 본 발명의 렌즈블록은 기판에 장착된 복수개의 LED에 각각 대응하는 렌즈를 구비하는 렌즈부; 및 상기 렌즈부의 각 렌즈들을 상호 일체로 연결하는 연결부;를 포함하여 구성된다.The lens block of the present invention for achieving the above object comprises a lens unit having a lens corresponding to each of the plurality of LED mounted on the substrate; And a connection part for integrally connecting each lens to the lens part.

전술한 구성에 있어서, 상기 연결부는 상기 렌즈부의 복수의 렌즈를 중심으로 주위 부분이 부분적으로 절취되어 구성되는 것을 특징으로 한다.In the above-described configuration, the connecting portion is characterized in that the peripheral portion is partially cut around the plurality of lenses of the lens unit.

전술한 구성에 있어서, 상기 연결부의 살 두께(C)는 상기 LED 패키지의 높이(A) 및 빛이 출사되는 LED 패키지와 연결부의 거리(B)에 대하여 C < A + B*tanθ 로 형성되는 것을 특징으로 한다(여기서, θ는 LED 패키지의 광 지향각을 제외한 비 발광 영역에 대한 수평면 기준의 각을 나타낸다).In the above-described configuration, the flesh thickness (C) of the connection portion is formed with C <A + B * tanθ with respect to the height (A) of the LED package and the distance (B) of the LED package from which the light is emitted. (Where θ represents the angle of the horizontal plane reference to the non-light emitting area excluding the light directing angle of the LED package).

또한, 상기와 같은 목적을 달성하기 위한 본 발명의 백라이트 장치는 기판상에 장착된 복수개의 LED; 및 상기 복수개의 LED들에 대하여 일체로 탈착가능하게 설치되는 상기 렌즈블록;을 포함하여 구성된다.
In addition, the backlight device of the present invention for achieving the above object is a plurality of LED mounted on the substrate; And the lens block detachably installed to the plurality of LEDs integrally.

상기와 같은 구성의 본 발명은 복수의 렌즈를 블록화시켜 전체적인 부품 수를 감소시킴으로써, 렌즈의 체결 공정을 단순화시키고, 공정 시간을 단축시킬 수 있다.According to the present invention having the above configuration, by blocking a plurality of lenses to reduce the overall number of parts, the fastening process of the lenses can be simplified and the process time can be shortened.

또한, 일체화된 렌즈블록에 의해 LED 모듈의 조립성과 생산성을 향상시킬 수 있다.In addition, the assembly and the productivity of the LED module can be improved by the integrated lens block.

또한, 본 발명의 렌즈블록은 각 렌즈 사이가 부분적으로 절취되어, 렌즈블록의 재료비를 최소화시킬 수 있다.
In addition, the lens block of the present invention can be partially cut between the lenses, thereby minimizing the material cost of the lens block.

도 1은 종래의 기술에 따른 백라이트 장치의 LED 모듈을 나타낸 사시도,
도 2는 종래의 기술에 따른 광 확산 렌즈가 적용된 LED 모듈을 나타낸 사시도,
도 3은 본 발명의 실시예에 따른 렌즈블록이 적용된 LED 모듈을 나타낸 사시도,
도 4는 도 3의 실시예에 따른 렌즈블록을 나타낸 사시도,
도 5는 본 발명의 다른 실시예에 따른 렌즈블록이 적용된 LED 모듈을 나타낸 사시도,
도 6은 본 발명의 다른 실시예에 따른 따른 렌즈블록을 나타낸 사시도,
도 7은 본 발명의 또 다른 실시예에 따른 렌즈블록을 나타낸 사시도 및 요부 확대도,
도 8은 본 발명의 실시예에 따른 렌즈블록의 체결 구조를 나타낸 상세 단면도.1 is a perspective view showing an LED module of a backlight device according to the prior art,
2 is a perspective view showing an LED module to which a light diffusion lens according to the prior art is applied;
3 is a perspective view showing an LED module to which a lens block is applied according to an embodiment of the present invention;
4 is a perspective view illustrating a lens block according to the embodiment of FIG. 3;
5 is a perspective view showing an LED module to which a lens block is applied according to another embodiment of the present invention;
6 is a perspective view of a lens block according to another embodiment of the present invention;
7 is a perspective view and an enlarged view illustrating a lens block according to another embodiment of the present invention;
8 is a detailed cross-sectional view showing a fastening structure of the lens block according to the embodiment of the present invention.

본 발명과 본 발명의 실시에 의해 달성되는 기술적 과제는 다음에서 설명하는 바람직한 실시예들에 의해 명확해질 것이다. 다음의 실시예들은 단지 본 발명을 설명하기 위하여 예시된 것에 불과하며, 본 발명의 범위를 제한하기 위한 것은 아니다. 이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 상세히 살펴보기로 한다.
The technical problem achieved by the present invention and the practice of the present invention will be apparent from the preferred embodiments described below. The following examples are merely illustrated to illustrate the present invention and are not intended to limit the scope of the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 3 및 도 4는 본 발명의 실시예에 따른 LED 모듈과 렌즈블록을 나타낸 사시도이며, 도 5 및 도 6은 본 발명의 다른 실시예에 따른 LED 모듈과 렌즈블록을 나타낸 사시도이다.3 and 4 are perspective views showing an LED module and a lens block according to an embodiment of the present invention, Figures 5 and 6 are perspective views showing an LED module and a lens block according to another embodiment of the present invention.

일반적으로 직하형 백라이트 장치는 복수개의 LED 패키지가 배치된 기판의 상측에 확산판과 광학 시트가 적층되며, 기판, 확산판 및 광학 시트는 커버버텀과 가이드 패널에 체결되는 구조를 이룬다.In general, the direct type backlight device has a structure in which a diffusion plate and an optical sheet are stacked on an upper side of a substrate on which a plurality of LED packages are disposed, and the substrate, the diffusion plate, and the optical sheet are fastened to the cover bottom and the guide panel.

상기와 같은 구조의 백라이트 장치에서 광원인 LED 패키지는 기판 상에 가로 및 세로 방향으로 일정 간격을 이루면서 복수개 배치되어 LED 모듈을 구성하여 상측을 빛을 조사하게 된다.In the backlight device having the above structure, a plurality of LED packages as light sources are disposed on the substrate at a predetermined interval in the horizontal and vertical directions to form an LED module to irradiate light to the upper side.

본 발명의 실시예에 따른 백라이트 장치의 LED 모듈(100)은 도 3에 도시된 바와 같이, 인쇄회로기판(30) 상에 복수개의 LED 패키지(20)가 배치되며, LED 패키지(20) 상측에는 광 지향각을 개선시키기 위한 렌즈블록(10)이 체결되는 구조를 이룬다.In the LED module 100 of the backlight device according to the exemplary embodiment of the present invention, as shown in FIG. 3, a plurality of LED packages 20 are disposed on the printed circuit board 30, and the LED package 20 is disposed on the LED package 20. A lens block 10 is fastened to improve the light directing angle.

구체적으로 살펴보면, 전술한 인쇄회로기판(30)은 LED 패키지(20)에 전원을 공급하고 LED 패키지(20)를 구동시키기 위한 각종 회로가 인쇄된 기판으로, LED 패키지(20)와 전기적으로 연결되도록 구성된다.In detail, the above-described printed circuit board 30 is a board on which various circuits for supplying power to the LED package 20 and driving the LED package 20 are printed, so as to be electrically connected to the LED package 20. It is composed.

전술한 LED 패키지(20)는 백라이트 장치의 광원으로, LED 칩에서 발생되는 빛은 몰딩부를 통과하면서 백색광과 같은 가시광선으로 출사된다.The above-described LED package 20 is a light source of the backlight device, the light generated from the LED chip is emitted as visible light such as white light while passing through the molding.

전술한 렌즈블록(10)은 LED 패키지(20)에서 출사되는 빛의 지향각을 향상시키기 위한 구성으로, 각 LED 패키지(20)가 배치된 위치에 대응하는 복수개의 렌즈(11)가 연결부(12)에 의하여 일체로 연결된 블록 단위를 형성하고 있다. 즉, 각 렌즈(11)는 상측으로 볼록한 돔 형상을 이루며, 복수개의 렌즈(11)는 시트 형상의 연결부(12)에 의하여 일체형으로 연결된다.The above-described lens block 10 is a configuration for improving the directivity angle of the light emitted from the LED package 20, the plurality of lenses 11 corresponding to the position where each LED package 20 is disposed is connected portion 12 Block units are integrally connected with each other. That is, each lens 11 has a convex dome shape, and the plurality of lenses 11 are integrally connected by the sheet-shaped connection part 12.

인쇄회로기판(30)에 배치된 LED 패키지(20)는 복수개가 렌즈블록(10)에 의하여 동시에 덮여지게 되고, 각 렌즈(11)의 하측 내부 공간에는 하나의 LED 패키지(20)가 배치되며, 각 LED 패키지(20)로부터의 빛은 렌즈(11)를 통과하면서 넓은 지향각으로 상측으로 출사된다.A plurality of LED packages 20 disposed on the printed circuit board 30 is simultaneously covered by the lens block 10, one LED package 20 is disposed in the lower inner space of each lens 11, Light from each LED package 20 is emitted upwards through the lens 11 at a wide direct angle.

이러한 렌즈블록(10)은 도 4에 도시된 바와 같이, 인쇄회로기판(30) 상에 배치되는 LED 패키지(20)의 위치에 대응하도록 복수개의 렌즈(11)가 배열되고, 각 렌즈 하측 단부는 소정의 두께를 가지는 시트 형상의 연결부(12)에 의하여 서로 연결되는 구조를 이룬다. 즉 시트 형상의 연결부(12) 상측으로 엠보 형상의 렌즈(11)가 돌출 형성되는 것으로, 렌즈(11)는 소정의 곡률을 가지는 구형을 이룬다.As shown in FIG. 4, the lens block 10 includes a plurality of lenses 11 arranged to correspond to the position of the LED package 20 disposed on the printed circuit board 30, and the lower end of each lens It forms a structure that is connected to each other by the sheet-shaped connecting portion 12 having a predetermined thickness. That is, the embossed lens 11 protrudes from the sheet-shaped connecting portion 12 and the lens 11 forms a sphere having a predetermined curvature.

상기와 같은 렌즈블록(10)은 인쇄회로기판 상에 배치되는 LED 패키지(20)가 일정 간격으로 규칙적으로 배열됨에 따라, LED 패키지(20)의 위치에 대응하도록 복수개의 렌즈(11)도 규칙적으로 배열되기 때문에 블록화가 가능한 것이다. In the lens block 10 as described above, since the LED packages 20 disposed on the printed circuit board are regularly arranged at regular intervals, the plurality of lenses 11 may also be regularly arranged to correspond to the positions of the LED packages 20. Blocking is possible because it is arranged.

한편, 본 발명의 다른 실시예에 따른 LED 모듈 및 렌즈블록은 도 5 및 도 6에 도시된 바와 같이, 복수개의 렌즈(11)를 연결하는 연결부(12)는 렌즈를 중심으로 주위 부분이 부분적으로 절취되는 개구된 공간(13)이 마련된. 이러한 개구된 공간(13)은 렌즈(11)를 제외한 부분인 연결부(12)의 일부에 형성되는 것으로, 렌즈블록(10)에 대한 재료비를 절감시킬 수 있다.Meanwhile, in the LED module and the lens block according to another exemplary embodiment of the present invention, as shown in FIGS. 5 and 6, the connection part 12 connecting the plurality of lenses 11 has a peripheral part partially around the lens. Provided with an open space 13 to be cut out. The opened space 13 is formed in a part of the connection part 12 except for the lens 11, and thus it is possible to reduce the material cost for the lens block 10.

도 4 및 도 6의 실시예에 따른 렌즈블록(10)은 투명 재질의 에폭시, 실리콘 수지, 우레탄계 수지 또는 그 혼합물을 이용하여 사출 성형 등의 방법으로 제조될 수 있다. 또한, 렌즈블록을 이루는 투명 수지물에는 확산제가 첨가될 수 있으며, 확산제가 첨가되는 경우 LED 모듈(100)의 상측에 적층되는 확산 시트의 수를 줄일 수 있는 효과를 나타낸다.The lens block 10 according to the embodiments of FIGS. 4 and 6 may be manufactured by injection molding using an epoxy, a silicone resin, a urethane resin, or a mixture thereof of a transparent material. In addition, a diffusing agent may be added to the transparent resin forming the lens block, and when the diffusing agent is added, the diffusing agent may reduce the number of diffusion sheets stacked on the upper side of the LED module 100.

이러한 구성의 렌즈블록(10)으로 도 3 및 도 5에 도시된 바와 같이 복수개의 LED 패키지(20)를 동시에 덮도록 인쇄회로기판(30)에 고정시키게 된다. 개별적으로 구성된 렌즈를 기판에 고정시키고자 하는 경우 각각의 렌즈 가장자리 하단부를 본딩 등의 방법으로 부착하는 까다로운 공정으로 이루어졌지만, 본 발명의 실시예에서와 같이 블록으로 구성되는 경우 렌즈블록(10)의 연결부와 기판을 본딩이나 체결 수단을 이용한 간단한 방법으로 고정시킬 수 있게 된다. 이때, 스크류와 같은 별도의 체결 수단을 이용하는 경우 연결부(12)에는 체결 홀(14)이 형성되어야 한다.3 and 5, the lens block 10 having the above configuration is fixed to the printed circuit board 30 to simultaneously cover the plurality of LED packages 20. In the case of fixing the lens individually configured to the substrate, it is a difficult process of attaching the lower end of each lens edge by bonding or the like, but in the case of the block as in the embodiment of the present invention, The connection portion and the substrate can be fixed by a simple method using bonding or fastening means. At this time, in the case of using a separate fastening means such as a screw, the connection portion 12 should be formed with a fastening hole (14).

한편, 도 7은 본 발명의 또 다른 실시예에 따른 렌즈블록을 나타낸 확대 사시도 및 요부 확대도이다.On the other hand, Figure 7 is an enlarged perspective view and main portion enlarged view showing a lens block according to another embodiment of the present invention.

본 발명의 또 다른 실시예에 따른 렌즈블록은, 도 6에서와 마찬가지로 복수의 렌즈(11)들이 연결부(12)를 통하여 상호 연결된다. 그러나 연결부(12)에는 각 렌즈(11)를 중심으로 가장자리의 원주 방향을 따라 절취되는 개구 공간(13)이 마련되며, 이때 렌즈(11)는 적어도 2 이상의 지지부(15)에 의해 연결부(12)로 연결되어 지지된다.In the lens block according to another exemplary embodiment of the present invention, as in FIG. 6, the plurality of lenses 11 are connected to each other through the connection part 12. However, the connecting portion 12 is provided with an opening space 13 which is cut along the circumferential direction of the edge around each lens 11, wherein the lens 11 is connected to the connecting portion 12 by at least two support portions 15. Is connected and supported.

이러한 구성에서는 렌즈블록(10)에 대한 재료비 절감과 동시에 LED 패키지(20)에서 출사되는 빛이 렌즈(11)와 렌즈(11) 사이의 연결부(12)를 통하여 흡수되는 것을 방지할 수 있고, 이에 의하여 외부로 방출되는 광량을 증대시킬 수 있는 효과가 제공된다. In this configuration, it is possible to prevent the light emitted from the LED package 20 from being absorbed through the connecting portion 12 between the lens 11 and the lens 11 at the same time reducing the material cost for the lens block 10, As a result, an effect of increasing the amount of light emitted to the outside is provided.

도 8은 본 발명의 실시예에 따른 렌즈블록의 체결 구조를 나타낸 상세 단면도이다.8 is a detailed cross-sectional view showing a fastening structure of the lens block according to the embodiment of the present invention.

렌즈블록(10)을 구성하는 연결부(12)가 LED 패키지(20)에서 출사되는 빛에 간섭을 받는 경우 상측으로 출사되는 광 특성에 영향을 미칠 수 있는데, 이러한 현상을 방지하기 위하여 연결부(12)는 소정의 두께로 형성되어야 한다.When the connection part 12 constituting the lens block 10 interferes with the light emitted from the LED package 20, the connection part 12 may affect the optical characteristics emitted upward. In order to prevent such a phenomenon, the connection part 12 is prevented. Should be formed to a predetermined thickness.

즉, 연결부(12)의 두께가 너무 두꺼운 경우 광 지향각에 의하여 LED 패키지(20)에서 출사되는 빛은 연결부(12)에서 전반사되어 광 간섭이 발생하는데, 이러한 현상을 방지하기 위해서는 연결부(12)의 두께가 LED 패키지(20)의 광 지향각 보다 낮은 높이로 형성되어야 한다.That is, when the thickness of the connection part 12 is too thick, the light emitted from the LED package 20 by the light directing angle is totally reflected by the connection part 12 to generate optical interference. In order to prevent such a phenomenon, the connection part 12 Should be formed at a height lower than the light directing angle of the LED package 20.

결국 광 간섭 현상은 연결부의 두께(C), LED 패키지의 높이(A) 및 빛이 출사되는 LED 패키지와 연결부의 거리(B)에 영향을 받게 되는 것으로, 연결부(12)의 두께(C)는 도 7에 도시된 바와 같이 C < A + B*tanθ로 형성되어야 한다.Eventually, the optical interference phenomenon is affected by the thickness (C) of the connection portion, the height (A) of the LED package and the distance (B) of the LED package and the connection portion from which light is emitted, and the thickness (C) of the connection portion 12 is As shown in FIG. 7, C <A + B * tanθ should be formed.

여기서 θ는 LED 패키지의 광 지향각을 제외한 비 발광 영역에 대한 수평면 기준의 각을 나타내는 것으로, 일 예로 120°의 광 지향각을 나타내는 LED 패키지의 경우 비 발광 영역에 대한 수평면 기준으로 각 θ=30°가 되며, 이 경우 연결부(12)의 두께(C)는 C < A + 0.58*B 로 형성되어야 한다.Here, θ represents the angle of the horizontal plane reference to the non-light emitting area excluding the light directing angle of the LED package. For example, in the case of an LED package showing a light directing angle of 120 °, the angle θ = 30 as a reference to the horizontal plane of the non-light emitting area. In this case, the thickness C of the connection part 12 should be formed as C <A + 0.58 * B.

연결부(12)의 두께를 상기와 같이 조절함으로써, 복수개의 렌즈를 연결부로 일체로 연결하더라도 LED 패키지(20) 자체의 광 지향각에 의한 간섭을 방지할 수 있게 된다.
By adjusting the thickness of the connection part 12 as described above, even if a plurality of lenses are integrally connected to the connection part, interference by the light directing angle of the LED package 20 itself can be prevented.

이상에서 본 발명에 있어서 실시예를 참고로 설명되었으나, 본 기술분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다.
Although the embodiments of the present invention have been described with reference to the present invention, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

10 : 렌즈블록 11 : 렌즈
12 : 연결부 13 : 개구 공간
20 : LED 패키지 30 : 인쇄회로기판
100 : LED 모듈10: lens block 11: lens
12 connection portion 13 opening space
20: LED package 30: printed circuit board
100: LED module

Claims (4)

기판에 장착된 복수개의 LED에 각각 대응하는 렌즈를 구비하는 렌즈부; 및
상기 렌즈부의 각 렌즈들을 상호 일체로 연결하는 연결부;를 포함하여 구성된 렌즈블록.A lens unit having a lens corresponding to each of the plurality of LEDs mounted on the substrate; And
And a connection unit for integrally connecting each lens to the lens unit. 제1항에 있어서,
상기 연결부는 상기 렌즈부의 복수의 렌즈를 중심으로 주위 부분이 부분적으로 절취되어 구성되는 것을 특징으로 하는 렌즈블록. The method of claim 1,
The connecting portion is a lens block, characterized in that the peripheral portion is formed by partially cutting around the plurality of lenses of the lens unit. 제1항 또는 제2항에 있어서, 상기 연결부의 살 두께(C)는,
상기 LED 패키지의 높이(A) 및 빛이 출사되는 LED 패키지와 연결부의 거리(B)에 대하여 C < A + B*tanθ 로 형성되는 것을 특징으로 하는 렌즈블록.
(여기서, θ는 LED 패키지의 광 지향각을 제외한 비 발광 영역에 대한 수평면 기준의 각을 나타낸다.)The flesh thickness C according to claim 1 or 2, wherein
The lens block, characterized in that formed by C <A + B * tanθ with respect to the height (A) of the LED package and the distance (B) of the LED package and the connection portion from which light is emitted.
(Where θ represents the angle of the horizontal plane reference to the non-light emitting area excluding the light directing angle of the LED package.) 기판상에 장착된 복수개의 LED; 및
상기 복수개의 LED들에 대하여 일체로 탈착가능하게 설치되는 상기 청구항 1 또는 청구항 2의 렌즈블록;을 포함하여 구성된 백라이트 장치.
A plurality of LEDs mounted on the substrate; And
And a lens block of claim 1 or 2, which is integrally detachable with respect to the plurality of LEDs.
KR1020100044318A 2010-05-12 2010-05-12 Lens block and backlight unit having the same KR20110124882A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130074101A (en) * 2011-12-26 2013-07-04 엘지이노텍 주식회사 A wide-angle lens for lighting and lighting device using the same
KR20140096854A (en) * 2013-01-29 2014-08-06 엘지이노텍 주식회사 Backlight unit thereof
KR20170002905A (en) * 2015-06-30 2017-01-09 주식회사 씨앤지옵틱 Multi Lens for LED Lighting
WO2020060030A1 (en) * 2018-09-21 2020-03-26 삼성전자주식회사 Led lens array for backlight device and display device having same
KR20210041831A (en) * 2019-10-08 2021-04-16 이영성 Aquaponics system with grow promotion means
US20230004047A1 (en) * 2021-06-30 2023-01-05 Lg Electronics Inc. Display device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130074101A (en) * 2011-12-26 2013-07-04 엘지이노텍 주식회사 A wide-angle lens for lighting and lighting device using the same
KR20140096854A (en) * 2013-01-29 2014-08-06 엘지이노텍 주식회사 Backlight unit thereof
KR20170002905A (en) * 2015-06-30 2017-01-09 주식회사 씨앤지옵틱 Multi Lens for LED Lighting
WO2020060030A1 (en) * 2018-09-21 2020-03-26 삼성전자주식회사 Led lens array for backlight device and display device having same
US11428985B2 (en) 2018-09-21 2022-08-30 Samsung Electronics Co., Ltd. LED lens array for backlight device and display device having same
KR20210041831A (en) * 2019-10-08 2021-04-16 이영성 Aquaponics system with grow promotion means
US20230004047A1 (en) * 2021-06-30 2023-01-05 Lg Electronics Inc. Display device
US11796861B2 (en) * 2021-06-30 2023-10-24 Lg Electronics Inc. Display device

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