KR100934494B1 - LED package for backlight sources - Google Patents

LED package for backlight sources Download PDF

Info

Publication number
KR100934494B1
KR100934494B1 KR1020070137419A KR20070137419A KR100934494B1 KR 100934494 B1 KR100934494 B1 KR 100934494B1 KR 1020070137419 A KR1020070137419 A KR 1020070137419A KR 20070137419 A KR20070137419 A KR 20070137419A KR 100934494 B1 KR100934494 B1 KR 100934494B1
Authority
KR
South Korea
Prior art keywords
light
led package
led
lens
backlight
Prior art date
Application number
KR1020070137419A
Other languages
Korean (ko)
Other versions
KR20090069679A (en
Inventor
이정기
Original Assignee
희성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 희성전자 주식회사 filed Critical 희성전자 주식회사
Priority to KR1020070137419A priority Critical patent/KR100934494B1/en
Priority to PCT/KR2008/004780 priority patent/WO2009082079A1/en
Publication of KR20090069679A publication Critical patent/KR20090069679A/en
Application granted granted Critical
Publication of KR100934494B1 publication Critical patent/KR100934494B1/en

Links

Images

Classifications

    • 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
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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

Landscapes

  • 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)
  • Led Device Packages (AREA)

Abstract

본 발명은 렌즈가 포함된 계단형 구조로 되어 광효율이 개선되고 지향각이 넓어진 백라이트 광원용 엘이디(LED) 패키지에 관한 것이다.The present invention relates to an LED package for a backlight light source having a stepped structure including a lens to improve light efficiency and to widen a direct angle.

본 발명의 백라이트 광원용 엘이디 패키지는, 측벽에 의해 형성된 공간의 판 위에 LED칩을 실장하여 백라이트의 광원으로 사용되는 LED 패키지에 있어서, 상기 측벽의 내측면이 상기 LED칩으로부터 조사(照射)된 광(光)중 내부에서 손실되는 광을 반사할 수 있는 계단형 구조로 되어 있고, 상기 LED칩에서 조사된 광과 반사된 광을 상방향으로 넓게 출사하는 렌즈가 상기 측벽 위쪽에 부착되어 상기 LED칩이 실장된 공간을 밀폐시키는 구조로 되어 있다.In the LED package for a backlight light source of the present invention, the LED package is used as a light source of the backlight by mounting the LED chip on the plate of the space formed by the side wall, the light that the inner surface of the side wall is irradiated from the LED chip It has a stepped structure that can reflect the light lost from the inside of the light, and a lens that emits the light irradiated from the LED chip and the reflected light in a wide upward direction is attached to the upper side of the LED chip This mounted space is sealed.

본 발명에 따른 백라이트 광원용 엘이디 패키지는 측벽의 빗변이 계단형 구조로 되어 있고 광을 넓게 출사시키는 렌즈를 구비하여 LED 패키지 내부의 전반사로 손실되는 광을 줄여 광 효율을 향상시키고, 측벽의 빗변에 의한 지향각은 수직방향에서의 광의 균일도를 향상시키며 렌즈에 의해 전 방향에서 균일하고 넓은 지향각을 얻을 수 있다.LED package for the backlight light source according to the present invention has a stepped structure of the hypotenuse of the side wall and has a lens that emits light widely to reduce the light lost by total reflection inside the LED package to improve the light efficiency, This directivity improves the uniformity of light in the vertical direction, and the lens can obtain a uniform and wide directivity in all directions.

Description

백라이트 광원용 엘이디 패키지{LED PACKAGE FOR BACKLIGHT}LED package for backlight light source {LED PACKAGE FOR BACKLIGHT}

본 발명은 백라이트유니트(BLU)의 광원으로 사용되는 발광다이오드(LED) 패키지에 관한 것으로, 더욱 상세하게는 렌즈가 포함된 계단형 구조로 되어 광효율이 개선되고 지향각이 넓어진 백라이트 광원용 엘이디(LED) 패키지에 관한 것이다.The present invention relates to a light emitting diode (LED) package used as a light source of a backlight unit (BLU), and more particularly to a stepped structure including a lens to improve the light efficiency and wider angle of view LED (LED) ) Package.

일반적으로, 액정표시장치의 백라이트(Back light)는 광원으로 CCFL(Cold Cathode Fluorescent Lamp), HCFL(Hot Cathode Fluorescent Lamp), EEFL(External Electrode Fluorescent Lamp) 등의 원통형 형광램프나 LED(Light Emitting Diode)소자, EL(Electro Luminescence)소자 등을 주로 사용하고, 광원이 배치되는 방식에 따라 측면 조광형(Edge-lighting)과 정면 조광형(Direct-lighting) 백라이트로 구분된다.In general, a backlight of a liquid crystal display device is a light source such as a cylindrical fluorescent lamp such as a Cold Cathode Fluorescent Lamp (CCFL), a Hot Cathode Fluorescent Lamp (HCFL), an External Electrode Fluorescent Lamp (EEFL), or a Light Emitting Diode (LED). Devices, EL (Electro Luminescence) devices, etc. are mainly used, and are classified into side-lighting and direct-lighting backlights according to the manner in which the light sources are arranged.

최근에는 소형화가 가능하고 구동이 용이하며 저소비전력으로 동작하는 LED 패키지를 백라이트 광원으로 사용하는 추세인데, 종래의 백라이트 광원용 LED 패키지는 도 1의 (가)에 도시된 바와 같이 사각판(12)에 원형 테두리(14)가 돌출된 형 태의 기판에 R,G,B LED칩(16)을 실장한 구조로 되어 있다. 이러한 종래의 백라이트 광원용 LED 패키지(10)는 도 1의 (나)에 도시된 바와 같이, 전반사 되지 않고 방출되는 각 θ가 -42°~ 42°정도이고, 그 외의 각도인 -43°~ -90°와 42°~ 90°는 외부로 방출되지 못하고 LED 패키지(10)에서 열로 소비된다.Recently, LED packages that can be miniaturized, easily driven, and operated at low power consumption are used as backlight sources. The LED package for a conventional backlight source has a square plate 12 as shown in FIG. The R, G, B LED chips 16 are mounted on a substrate having a circular edge 14 protruding from the substrate. In the conventional LED package 10 for a backlight light source, as shown in (b) of FIG. 1, the angle θ emitted without total reflection is about -42 ° to about 42 °, and other angles are about -43 ° to- 90 ° and 42 ° to 90 ° are not emitted to the outside but are consumed as heat in the LED package 10.

종래의 백라이트 광원용 LED 패키지는 방출되는 빛의 양이 적어 광효율이 낮고 외부로 방출되지 못한 빛이 열로 변환되므로 패키지의 방열량은 증가하는 문제점이 있다.The conventional LED package for a backlight light source has a problem that the amount of light emitted is low, so the light efficiency is low and light that is not emitted to the outside is converted into heat, thereby increasing the heat dissipation of the package.

본 발명은 상기와 같은 문제점을 해소하기 위해 제안된 것으로, 본 발명의 목적은 렌즈가 포함된 빗변 계단형 구조로 되어 광효율이 개선되고 지향각이 넓어진 백라이트 광원용 엘이디 패키지를 제공하는 것이다.The present invention has been proposed to solve the above problems, an object of the present invention is to provide an LED package for a backlight light source is improved light efficiency and wider angle of view as a hypotenuse stepped structure including a lens.

상기와 같은 목적을 달성하기 위하여 본 발명의 백라이트 광원용 엘이디 패키지는, 측벽에 의해 형성된 공간의 판 위에 LED칩을 실장하여 백라이트의 광원으로 사용되는 LED 패키지에 있어서, 상기 측벽의 내측면이 상기 LED칩으로부터 조사(照射)된 광(光)중 내부에서 손실되는 광을 반사할 수 있는 계단형 구조로 되어 있고,In order to achieve the above object, the LED package for a backlight light source of the present invention includes an LED chip mounted on a plate in a space formed by sidewalls and used as a light source of a backlight, wherein the inner surface of the sidewall is the LED. It has a stepped structure that can reflect light lost from the inside of light emitted from the chip,

상기 LED칩에서 조사된 광과 반사된 광을 상방향으로 넓게 출사하는 렌즈가 상기 측벽 위쪽에 부착되어 상기 LED칩이 실장된 공간을 밀폐시키는 구조로 된 것을 특징으로 한다.A lens that emits light emitted from the LED chip and the reflected light in an upward direction is attached to an upper side of the sidewall to seal a space in which the LED chip is mounted.

상기 두 계단 빗변의 각은 대략 38 ° <θ1 = θ2 < 42°사이의 값을 갖고, 계단의 1층 높이(b)와 2층 높이(b)의 비율(a/b)은 1.25 < a / b < 2.5 사이의 값을 갖는 것이 바람직하고, 상기 렌즈의 구조는 높이(High)와 직경(Diameter)이 0.04 ≤ High/Diameter ≤ 0.1의 비율을 가지는 것이 바람직하다.The angle of the two step hypotenuses has a value between approximately 38 ° <θ1 = θ2 <42 °, and the ratio (a / b) of the first floor height b and the second floor height b of the stairs is 1.25 <a / It is preferable to have a value of b <2.5, and the structure of the lens preferably has a ratio of High and Diameter of 0.04 ≦ High / Diameter ≦ 0.1.

본 발명에 따른 백라이트 광원용 엘이디 패키지는 측벽의 빗변이 계단형 구조로 되어 있고 광을 넓게 출사시키는 렌즈를 구비하여 LED 패키지 내부의 전반사로 손실되는 광을 줄여 광 효율을 향상시키고, 측벽의 빗변에 의한 지향각은 수직방향에서의 광의 균일도를 향상시키며 렌즈에 의해 전 방향에서 균일하고 넓은 지향각을 얻을 수 있다.LED package for a backlight light source according to the present invention has a stepped structure of the hypotenuse of the side wall and has a lens that emits light widely to reduce the light lost by total reflection inside the LED package to improve the light efficiency, and to the hypotenuse of the sidewall This directivity improves the uniformity of light in the vertical direction, and the lens can obtain a uniform and wide directivity in all directions.

본 발명과 본 발명의 실시에 의해 달성되는 기술적 과제는 다음에서 설명하는 본 발명의 바람직한 실시예들에 의하여 보다 명확해질 것이다. 다음의 실시예들은 단지 본 발명을 설명하기 위하여 예시된 것에 불과하며, 본 발명의 범위를 제한하기 위한 것은 아니다. The technical problems achieved by the present invention and the practice of the present invention will be more clearly understood by the preferred embodiments of the present invention 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.

도 2는 본 발명에 따른 백라이트 광원용 LED 패키지를 도시한 도면이고, 도 3은 본 발명에 따른 백라이트 광원용 LED 패키지의 특성을 설명하기 위한 측단면도이다.2 is a view showing an LED package for a backlight light source according to the present invention, Figure 3 is a side cross-sectional view for explaining the characteristics of the LED package for a backlight light source according to the present invention.

본 발명에 따른 백라이트 광원용 LED 패키지(100)는 도 2의 (가)에 도시된 바와 같이, 사각 판(110)에 원형 측벽(114)이 돌출된 구조에서 상기 측벽(114)의 내측 단면이 도 2의 (나)에 도시된 바와 같이 계단형 구조로 되어 있어 측벽(114) 내에 실장되는 R, G, B LED칩(120)에서 발생되는 빛이 보다 많이 외부로 방출되도록 되어 있다. 그리고 측벽(114) 위에는 외측으로 볼록한 렌즈(130)가 부착되어 LED 칩(120)에서 발광되는 빛이 도 2의 (나)에 도시된 바와 같이 지향각이 넓어진 것을 알 수 있다.As shown in (a) of FIG. 2, the LED package 100 for the backlight light source according to the present invention has an inner cross section of the side wall 114 in a structure in which the circular side wall 114 protrudes from the square plate 110. As shown in (b) of FIG. 2, the stepped structure is configured to emit more light generated from the R, G, and B LED chips 120 mounted in the sidewalls 114 to the outside. In addition, the convex lens 130 is attached to the outer side of the sidewall 114, so that the light emitted from the LED chip 120 has a wider angle of view as shown in (b) of FIG.

도 2를 참조하면, 백라이트 광원에 사용되는 LED칩(120)은 적색(R) LED칩, 녹색(G) LED칩, 녹색(G) LED칩, 청색(B) LED칩 등이 배열되어 이들 3가지 색의 조합에 의해 백색광을 발현하도록 되어 있다.2, the LED chip 120 used for the backlight light source is a red (R) LED chip, a green (G) LED chip, a green (G) LED chip, a blue (B) LED chip and the like are arranged these 3 White light is expressed by a combination of branches.

LED 칩(120)이 실장되는 패키지 판(110)은 사각형의 판에 측벽(114)이 원형 테두리처럼 돌출되어 있고, 측벽의 내면은 도 2의 (나)에 도시된 바와 같이 바깥측의 최선단부터 수평면(114d)을 이룬 후 경사면(114c)을 형성하고 중간 부분에서 다시 수평면(114b)을 형성한 후 다시 내측으로 경사면(114a)을 형성하여 2개 층의 계단을 갖는 구조로 되어 있다.The package plate 110 on which the LED chip 120 is mounted has a rectangular plate with sidewalls 114 protruding like a circular rim, and the inner surface of the sidewall is the outermost end as shown in (b) of FIG. 2. After forming the horizontal plane 114d, the inclined plane 114c is formed and the horizontal plane 114b is formed again in the middle portion, and then the inclined plane 114a is formed inward to form a step having two layers.

그리고 측벽(114) 위에는 위로 볼록한 반구형 렌즈(130)가 부착되어 내측 공간에 실장된 LED칩들(120)을 보호함과 아울러 빛의 방향을 넓게 하여 지향각이 넓어지도록 되어 있다.The convex hemispherical lens 130 is attached to the side wall 114 to protect the LED chips 120 mounted in the inner space and to widen the direction of light to widen the orientation angle.

이와 같은 본 발명의 렌즈(130)가 부착되고 계단을 갖는 구조의 LED 패키지(100)는 도 3에 도시된 바와 같이, LED칩(120)으로부터 조사(照射)된 광(光)중 내부 손실되는 광을 반사하는 빗변 계단형 구조와, LED 패키지 상부에 위치되며 LED칩(120)에서 조사된 광과 반사된 광을 상방향으로 광광(廣光)하는 렌즈(130)로 구성되고, 두 계단 빗변의 각은 대략 38 ° <θ1 = θ2 < 42°사이의 값을 갖는 것이 바람직하며, 계단의 1층 높이(b)와 2층 높이(a) 사이의 비율은 1.25 < a / b < 2.5 사이의 값을 갖는 것이 바람직하다. 또한 렌즈(130)의 구조는 렌즈의 높이(High)와 직경(Diameter)이 0.04 ≤ High/Diameter ≤ 0.1의 비율을 가지는 것이 바람직하다.As shown in FIG. 3, the LED package 100 having a structure having the lens 130 of the present invention attached thereto and having a step is internally lost in light emitted from the LED chip 120. It consists of a hypotenuse staircase structure that reflects light, and a lens 130 that is located on the LED package and that the light emitted from the LED chip 120 and the reflected light in the upward direction, the two steps of the hypotenuse The angle preferably has a value between approximately 38 ° <θ1 = θ2 <42 °, and the ratio between the first floor height (b) and the second floor height (a) of the stairs is between 1.25 <a / b <2.5. It is preferable to have. In addition, the structure of the lens 130 preferably has a ratio of the height and the diameter of the lens to 0.04 ≦ High / Diameter ≦ 0.1.

따라서 본 발명에 따른 LED 패키지는 일반 구조의 LED 패키지처럼 전반사 되는 빛이 없이 모든 방향으로 출사되고, 단지 몰딩 물질 및 기구물의 흡수율이 작용하여 일부 광을 손실시킬 수 있을 뿐이다.Therefore, the LED package according to the present invention is emitted in all directions without the total reflection of the light as the LED package of the general structure, only the absorption of the molding material and the fixture acts can only lose some light.

도 4는 LED 패키지 구조에 따른 배광분포 및 출사광량 특성을 비교 도시한 도면으로서, 일반적인 구조(종래 구조)와 계단형 패키지 구조, 및 렌즈가 부가된 계단형 구조의 특성이 도시되어 있고, 도 5는 본 발명에 따른 LED 패키지를 사용하는 백라이트 광원에서 휘도 측정 위치를 도시한 도면이다.4 is a view illustrating a comparison of light distribution and emission light characteristics according to an LED package structure, in which a general structure (conventional structure), a stepped package structure, and a stepped structure to which a lens is added are illustrated, and FIG. 5. Is a view illustrating a luminance measurement position in a backlight light source using the LED package according to the present invention.

도 4를 참조하면, 일반적인 구조의 LED 패키지는 (가)에 도시된 바와 같이 배광분포는 Lambertian 형태를 따르고, 계단형 구조의 LED 패키지는 (나)에 도시된 바와 같이 수직방향에서 균일한 배광분포를 따르며, 렌즈를 갖는 계단형 구조의 LED 패키지는 (다)에 도시된 바와 같이 전방향에서 균일한 광 분포를 이룬다. 또한 R,G,G,B 칩 각각에서 광량 100 lumen, 전체 400 lumen이 출광시 (가)의 일반적인 구조에서는 광량 129 lumen만 외부로 출광되며, (나)의 빗변 계단형에서는 광량 188 lumen이 출광되고, (다)의 렌즈에 의해서 그 효과는 배가되어 340 lumen이 출광되어 높은 효율을 보이고 있다. 이때 측벽과 몰드에 의한 흡수를 제외한 것이다.Referring to FIG. 4, the LED package having a general structure has a Lambertian shape as shown in (A), and the LED package having a stepped structure has a uniform light distribution in the vertical direction as shown in (B). The LED package of the stepped structure with the lens has a uniform light distribution in all directions as shown in (C). In addition, 100 lumens and 400 lumens of light are emitted from each of the R, G, G, and B chips, and only 129 lumens of light is emitted from the general structure of (A). The effect is multiplied by the lens of (c), and 340 lumens are emitted to show high efficiency. At this time, the absorption by the side wall and the mold is excluded.

따라서 이와 같은 본 발명의 LED 패키지(100)로 정면 조광형 백라이트 유니트(200)를 구성할 경우, 도 5에 도시된 바와 같이 금속 코어 PCB(Metal Core PCB:MCPCB)상에 LED 패키지들(100)이 배열되어 면광원을 형성한다. 금속 코어 PCB는 금속재질(예컨대. 알루미늄)의 코어의 상하면에 절연체 플레이트를 형성한 PCB로서 발열이 큰 LED를 다수 실장하는 경우 열방출이 용이한 특성을 갖는다.Therefore, when the front dimming backlight unit 200 is configured with the LED package 100 of the present invention, as shown in FIG. 5, the LED packages 100 are mounted on a metal core PCB (MCPCB). Arranged to form a surface light source. The metal core PCB is an insulator plate formed on the upper and lower surfaces of a core of a metal material (eg, aluminum), and has a characteristic of easily dissipating heat when a large number of LEDs with high heat generation are mounted.

그리고 일반적인 구조의 LED 패키지(10)를 사용한 경우와 계단형 구조의 패키지(100)를 사용한 경우 A,B,C 위치에서 각각 휘도를 측정한 결과 다음 표1과 같은 측정치를 구할 수 있었다.In the case of using the LED package 10 of the general structure and the package 100 of the stepped structure, the luminance was measured at positions A, B, and C, respectively.

A A B B C C 균일도Uniformity 일반구조 LED 패키지General structure LED package 4181 nit 4181 nit 4262 nit 4262 nit 4683 nit 4683 nit 1.121.12 계단구조 LED 패키지Stepped LED Package 18842 nit 18842 nit 18927 nit 18927 nit 19507 nit 19507 nit 1.041.04

상기 표1에 따르면, 본 발명에 따른 계단 구조의 LED 패키지(100)가 일반 구조의 LED 패키지(10)에 비해 휘도가 크고, 균일도도 우수한 것을 알 수 있다.According to Table 1, it can be seen that the LED package 100 of the staircase structure according to the present invention has greater luminance and excellent uniformity than the LED package 10 of the general structure.

이상에서 본 발명은 도면에 도시된 일 실시예를 참고로 설명되었으나, 본 기술분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다. The present invention has been described above with reference to one embodiment shown in the drawings, but those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

도 1은 종래의 백라이트 광원용 LED 패키지를 도시한 도면,1 is a view showing a LED package for a conventional backlight light source,

도 2는 본 발명에 따른 백라이트 광원용 LED 패키지를 도시한 도면,2 is a view showing an LED package for a backlight light source according to the present invention;

도 3은 본 발명에 따른 백라이트 광원용 LED 패키지의 특성을 설명하기 위한 측단면도,Figure 3 is a side cross-sectional view for explaining the characteristics of the LED package for a backlight light source according to the present invention,

도 4는 LED 패키지 구조에 따른 배광 분포 및 출사 광량 특성을 비교 도시한 도면,4 is a view showing a comparison of light distribution and light emission characteristics according to the LED package structure;

도 5는 본 발명에 따른 LED 패키지를 사용하는 백라이트유니트에서 휘도측정 위치를 도시한 도면.5 is a view illustrating a luminance measurement position in a backlight unit using the LED package according to the present invention.

*도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

100: LED 패키지 110: 패키지 플레이트100: LED package 110: package plate

114: 측벽 120: LED칩114: side wall 120: LED chip

130: 렌즈130: lens

Claims (3)

측벽에 의해 형성된 공간의 판 위에 LED칩을 실장하여 백라이트의 광원으로 사용되는 LED 패키지에 있어서,In the LED package used as a light source of the backlight by mounting the LED chip on the space plate formed by the side wall, 상기 측벽의 내측면이The inner side of the side wall 상기 LED칩으로부터 조사(照射)된 광(光)중 내부에서 손실되는 광을 반사할 수 있는 빗변 계단형 구조로 되어 있고,It has a hypotenuse staircase structure that can reflect the light lost from the inside of the light irradiated from the LED chip, 상기 LED칩에서 조사된 광과 반사된 광을 상방향으로 넓게 출사하는 렌즈가 상기 측벽 위쪽에 부착되어 상기 LED칩이 실장된 공간을 밀폐시키는 구조로 되어 있으며,The lens which emits the light irradiated from the LED chip and the reflected light in the upward direction is attached to the upper sidewall to seal the space in which the LED chip is mounted. 상기 측벽의 계단을 형성하는 빗변의 각은 38 ° <θ1 = θ2 < 42°사이의 값을 갖고, 상기 계단의 1층 높이(b)와 2층 높이(a) 사이의 비율은 1.25 < a / b < 2.5 사이의 값을 갖는 것을 특징으로 하는 백라이트 광원용 엘이디 패키지.The angle of the hypotenuse that forms the step of the side wall has a value between 38 ° <θ1 = θ2 <42 °, and the ratio between the first floor height b and the second floor height a of the step is 1.25 <a / LED package for a backlight light source, characterized in that having a value of b <2.5. 삭제delete 제1항에 있어서, 상기 렌즈의 구조는According to claim 1, wherein the structure of the lens 렌즈의 높이(High)와 직경(Diameter)이 0.04 ≤ High/Diameter ≤ 0.1의 비율을 가지는 것을 특징으로 하는 백라이트 광원용 엘이디 패키지.An LED package for a backlight light source, characterized in that the height (High) and diameter (Diameter) of the lens has a ratio of 0.04 ≤ High / Diameter ≤ 0.1.
KR1020070137419A 2007-12-26 2007-12-26 LED package for backlight sources KR100934494B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020070137419A KR100934494B1 (en) 2007-12-26 2007-12-26 LED package for backlight sources
PCT/KR2008/004780 WO2009082079A1 (en) 2007-12-26 2008-08-18 Led package for backlight

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070137419A KR100934494B1 (en) 2007-12-26 2007-12-26 LED package for backlight sources

Publications (2)

Publication Number Publication Date
KR20090069679A KR20090069679A (en) 2009-07-01
KR100934494B1 true KR100934494B1 (en) 2009-12-30

Family

ID=40801348

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070137419A KR100934494B1 (en) 2007-12-26 2007-12-26 LED package for backlight sources

Country Status (2)

Country Link
KR (1) KR100934494B1 (en)
WO (1) WO2009082079A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108037612A (en) * 2017-11-30 2018-05-15 青岛海信电器股份有限公司 Liquid crystal display device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113078253B (en) * 2021-04-01 2022-11-11 淄博职业学院 Art exhibition lighting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050029384A (en) * 2003-09-22 2005-03-28 엘지이노텍 주식회사 Light emitting diode package and method for manufacturing light emitting diode package
KR20060040502A (en) * 2004-11-06 2006-05-10 럭스피아 주식회사 Light emitting unit and back light apparatus using the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101201307B1 (en) * 2005-06-30 2012-11-14 엘지디스플레이 주식회사 Back Light Unit
JP2004327504A (en) * 2003-04-21 2004-11-18 Kyocera Corp Package for light emitting element and light emitting device
JP4513759B2 (en) * 2005-04-27 2010-07-28 三菱電機株式会社 Surface light source device
KR100649765B1 (en) * 2005-12-21 2006-11-27 삼성전기주식회사 Led package and back light unit using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050029384A (en) * 2003-09-22 2005-03-28 엘지이노텍 주식회사 Light emitting diode package and method for manufacturing light emitting diode package
KR20060040502A (en) * 2004-11-06 2006-05-10 럭스피아 주식회사 Light emitting unit and back light apparatus using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108037612A (en) * 2017-11-30 2018-05-15 青岛海信电器股份有限公司 Liquid crystal display device

Also Published As

Publication number Publication date
KR20090069679A (en) 2009-07-01
WO2009082079A1 (en) 2009-07-02

Similar Documents

Publication Publication Date Title
JP6629382B2 (en) Light emitting device package
US8546834B2 (en) LED package
TWI439640B (en) Thin luminaire for general lighting applications
US8545082B2 (en) Light emitting apparatus and lighting system
TWI518948B (en) To enhance the luminous angle of the small size of the LED package to improve the structure
US8746907B2 (en) Fluorescent tube type LED lamp
TWI443423B (en) Light emitting apparatus and display apparatus having the same
US9127827B2 (en) Lighting device
US20090161340A1 (en) White light illuminator and reading lamp using the same
US8748905B2 (en) High efficacy semiconductor light emitting devices employing remote phosphor configurations
JP2009538532A5 (en)
KR101144635B1 (en) Aspherical led lens and light emitting device for backlight having the same
US9732935B2 (en) Light source device and illumination device
US7897985B2 (en) LED light engine kernel and method of making the kernel
KR20150141220A (en) Light source module, lighting device and lighting system
KR20140018979A (en) Light emitting diode (led) packages, systems, devices and related methods
TW201306325A (en) White light emitting device, and display apparatus and illumination apparatus using the same
KR20160015447A (en) Lens, light source module, lighting device and lighting system
US20140320781A1 (en) Light source unit and display device including the same
WO2016155219A1 (en) Display, backlight module and led light source device
KR100934494B1 (en) LED package for backlight sources
KR101243826B1 (en) Light Emitting Diode Pakage, Method for Manufacturing the Same and Light Source Unit Having the LED Pakage
KR101993346B1 (en) Illuminating device and design method of the same
JP2013149690A (en) Light-emitting device and illuminating device
KR101724699B1 (en) Light emitting apparatus and lighting system

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee