KR20010067948A - A back light apparatus for liquid crystal display of mobile communication terminal - Google Patents
A back light apparatus for liquid crystal display of mobile communication terminal Download PDFInfo
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- KR20010067948A KR20010067948A KR1020010018835A KR20010018835A KR20010067948A KR 20010067948 A KR20010067948 A KR 20010067948A KR 1020010018835 A KR1020010018835 A KR 1020010018835A KR 20010018835 A KR20010018835 A KR 20010018835A KR 20010067948 A KR20010067948 A KR 20010067948A
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction
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- Optics & Photonics (AREA)
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- Crystallography & Structural Chemistry (AREA)
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- Microelectronics & Electronic Packaging (AREA)
- Planar Illumination Modules (AREA)
Abstract
Description
본 발명은 이동통신 단말기의 액정표시소자(Liquid Crystal Display)용 백라이트(back light) 장치에 관한 것이다.The present invention relates to a backlight device for a liquid crystal display of a mobile communication terminal.
일반적으로, 노트북, 테스크탑 컴퓨터, 액정 티브이(TV), 이동통신 단말기 등과 같은 표시장치에 이용되고 있는 엘.씨.디(LCD)와 같은 액정표시소자는 다른 화상표시기구인 씨알티(CRT)에 비해 경박단소형화 및 저소비전력을 실현할 수 있는 장점이 있으므로 그 수요가 증가되고 있다. 그런데, 상기 액정표시소자는 씨알티 등과 달리 스스로 빛을 내는 소자가 아니라 수광소자이므로 액정화면 외에 광유니트를 필요로 한다.In general, liquid crystal display devices such as LCD, which are used in display devices such as laptops, desktop computers, liquid crystal televisions (TVs), mobile communication terminals, and the like, are compared with other image display apparatuses, such as CRT. The demand is increasing because there is an advantage that can realize a light and small size and low power consumption. However, the liquid crystal display device is a light-receiving device, not a device that emits light by itself, unlike CALTI and the like, and requires an optical unit in addition to the liquid crystal display.
이러한 액정표시소자의 광유니트는 형광램프(CCFL 또는 HCFL)의 설치 위치에 따라 직하식 백라이트 및 에지-라이트식 백라이트로 구분된다. 직하식 백라이트 유니트는 형광램프로부터 발생된 광을 확산판을 이용하여 균일화시킨 후, 이 광을 액정패널에 입사시키는 구조이고, 에지-라이트식 백라이트 유니트는 형광램프의 빛을 도광판을 통해 액정패널에 입사시키는 구조를 가진다.The light unit of the liquid crystal display is classified into a direct backlight and an edge-light backlight according to the installation position of the fluorescent lamp (CCFL or HCFL). The direct backlight unit has a structure in which the light generated from the fluorescent lamp is homogenized by using a diffusion plate, and then the light is incident on the liquid crystal panel. The edge-light backlight unit uses the light from the fluorescent lamp to the liquid crystal panel. It has a structure to make it incident.
한편, 이동통신 단말기의 액정표시장치에 이용되는 광유니트는 크기가 작은 액정을 사용하기 때문에, 전계발광소자(EL) 또는 발광 다이오드(LED)가 이용된다. 여기서, 전계발광소자는 직하식 백라이트로 액정표시장치 밑면에 설치되어 자체적으로 발광되는 면광원이고, 점광원 형태의 발광다이오드는 에지-라이트식 백라이트로 액정표시장치의 측면에 다수 배치되며, 액정표시장치의 밑면에 설치되는 도광판을 통하여 비교적 균일한 면광원을 발생시킨다.On the other hand, since the optical unit used in the liquid crystal display device of the mobile communication terminal uses a small liquid crystal, an electroluminescent element (EL) or a light emitting diode (LED) is used. Here, the electroluminescent element is a surface light source which is installed directly on the bottom of the liquid crystal display as a direct backlight and emits light by itself, and a plurality of light emitting diodes in the form of point light sources are arranged on the side of the liquid crystal display as an edge-lit backlight, A relatively uniform surface light source is generated through the light guide plate provided at the bottom of the device.
그런데, 발광다이오드를 이용한 이동통신 단말기의 백라이트 장치는 전계발광소자의 그것보다 휘도는 낮지만 전력소모가 적고 발광회로도 간단하므로 현재 가장 범용적으로 사용되고 있다.By the way, the backlight device of the mobile communication terminal using the light emitting diode is lower than that of the electroluminescent device, but the power consumption is low and the light emitting circuit is simple, and is currently used most widely.
도 1은 전형적인 이동통신 단말기용 백라이트 장치의 구조를 개략적으로 도시한 구성도이다.1 is a configuration diagram schematically showing the structure of a typical backlight device for a mobile communication terminal.
도 1을 참조하면, 이동통신 단말기의 백라이트 장치(10)는 점광원 형태의 엘.이.디(LED)(12)와, LED(12)로부터 출사되는 빛을 산란시켜 균일화시키는 도광판 (14)과, 도광판(14) 하부에 배치되어 LED(12)로부터 발생된 빛이 외부로 노출되는 것을 방지하기 위한 반사판(16)을 구비한다.Referring to FIG. 1, a backlight device 10 of a mobile communication terminal includes an L.D. (LED) 12 having a point light source and a light guide plate 14 for scattering and homogenizing light emitted from the LED 12. And a reflector 16 disposed under the light guide plate 14 to prevent the light generated from the LED 12 from being exposed to the outside.
다수의 LED(12)를 조합한 LED 어레이(18)에서 나온 빛은 도광판(14)의 하면에 형성된 산란패턴(도 2b의 11)에 의해 산란되어 도광판(14)의 상부쪽으로 전진하고, 도광판(14)의 하면을 통과한 일부 빛은 반사판(16)에 의해 다시 반사되어 도광판(14)의 상부쪽으로 전진하게 된다. 따라서, 도광판(14) 전체에 걸쳐 상부쪽으로 전진하는 빛이 골고루 분포하게 된다.Light emitted from the LED array 18 combining the plurality of LEDs 12 is scattered by a scattering pattern (11 in FIG. 2B) formed on the bottom surface of the light guide plate 14, and is advanced toward the upper part of the light guide plate 14. Some of the light passing through the lower surface of the 14 is reflected back by the reflecting plate 16 to advance toward the upper portion of the light guide plate 14. Therefore, the light advancing upward over the light guide plate 14 is evenly distributed.
그런데, 도 2a 및 도 3에 도시된 바와 같이, 도광판(14)의 상면에는 일 방향 프리즘패턴(13)이 형성되는데, 이 프리즘 패턴(13)에 의해 빛이 도광판(14)에 수직 방향으로 집광되고, 도광판(14)의 상부에 배치된 액정패널(미도시) 쪽으로 입사된다. 그러나, 상기 프리즘패턴(13)은 일 방향성이므로 도광판(14)의 가로방향 또는 세로방향 중 어느 한 방향으로만 집광효과가 있으며 따라서, 백라이트 장치(10)의 휘도 및 휘도의 균일성이 저하됨은 물론, 시야각이 좁을 뿐만 아니라 도광판(14)의상면에 빛샘 또는 빛의 얼룩 현상이 발생되는 문제점이 있다.2A and 3, the one-way prism pattern 13 is formed on the upper surface of the light guide plate 14, and the light is focused in a direction perpendicular to the light guide plate 14 by the prism pattern 13. And incident toward a liquid crystal panel (not shown) disposed above the light guide plate 14. However, since the prism pattern 13 is unidirectional, the light collecting plate 14 has a light converging effect in only one of the horizontal and vertical directions of the light guide plate 14. Therefore, the brightness and the uniformity of the brightness of the backlight device 10 are deteriorated. In addition, the viewing angle is narrow and there is a problem that light leakage or light staining occurs on the upper surface of the light guide plate 14.
본 발명은 상기 문제점을 감안하여 착상된 것으로서, 출사면에 다수의 사각뿔을 음각시킨 프리즘패턴을 갖는 도광판을 구비함으로써 높은 휘도와 균일한 집광 효과를 발휘할 수 있는 이동통신 단말기의 액정표시소자용 백라이트 장치를 제공하는데 그 목적이 있다.The present invention was conceived in view of the above-mentioned problems, and has a light guide plate having a prism pattern in which a plurality of square pyramids are engraved on an emission surface, thereby providing a high brightness and a uniform condensing effect. The purpose is to provide.
도 1은 전형적인 이동통신 단말기의 액정표시소자용 백라이트 장치의 구조를 개략적으로 도시한 구성도.1 is a configuration diagram schematically showing the structure of a backlight device for a liquid crystal display device of a typical mobile communication terminal.
도 2a는 도 1에 도시된 도광판의 상면을 종래기술로 도시한 평면도.FIG. 2A is a plan view illustrating a top surface of the light guide plate shown in FIG.
도 2b는 도 1에 도시된 도광판의 하면을 도시한 평면도.FIG. 2B is a plan view illustrating a bottom surface of the light guide plate illustrated in FIG. 1. FIG.
도 3은 도 2a의 프리즘패턴을 도시한 부분 사시도.3 is a partial perspective view illustrating the prism pattern of FIG. 2A;
도 4는 본 발명의 바람직한 실시예에 따른 도 1에 도시된 도광판의 상면을 도시한 평면도.4 is a plan view showing a top surface of the light guide plate shown in FIG. 1 according to a preferred embodiment of the present invention.
도 5는 도 4의 Ⅴ-Ⅴ선 단면도로서 프리즘 패턴 부위를 나타낸 도면.FIG. 5 is a cross-sectional view taken along line V-V of FIG. 4 showing a prism pattern portion. FIG.
도 6은 도 4의 "A" 부위의 확대 사시도.6 is an enlarged perspective view of the portion “A” of FIG. 4.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
30...LED 어레이 32...LED 40...도광판30 ... LED array 32 ... LED 40 ... light guide plate
42...입사면 44...프리즘패턴 46...출사면42 entrance face 44 prism pattern 46 exit face
50...반사판50 ... reflective plate
상기 목적을 달성하기 위한 본 발명은, 광원으로서의 LED 어레이; 상기 광원으로부터 출사된 광이 입사되는 입사면과, 상기 입사면으로 입사된 광이 출사되는 출사면에 형성되며, 다수의 사각뿔이 상기 출사면에 음각된 프리즘패턴을 가진 도광판; 및 상기 출사면의 대향면에 배치된 반사판을 구비한다.The present invention for achieving the above object, the LED array as a light source; A light guide plate formed on an incident surface on which light emitted from the light source is incident and on an exit surface on which light incident on the incident surface is emitted, the light guide plate having a plurality of square pyramids engraved on the exit surface; And a reflector disposed on an opposite surface of the exit surface.
상기 프리즘패턴은 상기 도광판의 가로 및 세로 양 방향으로 음각된 다수의 사각뿔 형태인 것이 바람직하다.The prism pattern may be in the form of a plurality of square pyramids engraved in both horizontal and vertical directions of the light guide plate.
이하, 본 발명의 바람직한 실시예에 따른 이동통신 단말기의 액정표시소자용 백라이트 장치를 첨부된 도면을 참조하여 설명한다.Hereinafter, a backlight device for a liquid crystal display device of a mobile communication terminal according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.
도 4는 본 발명의 바람직한 실시예에 따른 이동통신 단말기의 액정표시소자용 백라이트 장치 특히, 도광판의 상면을 개략적으로 도시한 평면도이고, 도 5는 도 4의 Ⅴ-Ⅴ선 단면도이다.4 is a plan view schematically illustrating a top surface of a backlight device for a liquid crystal display device, in particular, a light guide plate, of a mobile communication terminal according to a preferred embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along line V-V of FIG. 4.
도 4 및 도 5를 참조하면, 상기 백라이트 장치(100)는 광원으로서 엘.이.디 (LED) 어레이(30)와, 입사면(42) 및 소정의 프리즘패턴(44)이 형성된 출사면(46)을가진 도광판(40), 및 출사면(46)에 대향되는 면에 배치되는 반사판(50)을 구비한다.Referring to FIGS. 4 and 5, the backlight device 100 includes an emission surface having an LED array 30, an incident surface 42, and a predetermined prism pattern 44 as a light source. A light guide plate 40 having a 46, and a reflecting plate 50 disposed on a surface opposite to the exit surface 46.
상기 LED 어레이(30)는 도광판(40)의 양측 입사면(42)에 평행하도록 배치된 다수의 LED(32)로서 단말기의 회로 부분인 PCB 위에 직접 구성되거나 혹은 PCB와 떨어져 연결소자로써 작동되도록 구성된다. 또한, LED 어레이(30)는 도광판(40)의 두 면 이상에 설치된다. 도면에는 양방향의 입사면(42)에 LED 어레이(30)가 설치된 것을 도시하고 있다.The LED array 30 is a plurality of LEDs 32 arranged to be parallel to both side incident surface 42 of the light guide plate 40 to be configured directly on the PCB which is a circuit part of the terminal or to be separated from the PCB to operate as a connection element. do. In addition, the LED array 30 is installed on two or more surfaces of the light guide plate 40. The figure shows that the LED array 30 is provided in the bidirectional incidence surface 42.
상기 도광판(40)은 투광성 재료 즉, 폴리메틸메타아크닐레이트(PMMA)와 같은 아크릴계 수지 재료 등이 이용된다.The light guide plate 40 is made of a light-transmissive material, that is, an acrylic resin material such as polymethyl methacrylate (PMMA).
상기 입사면(42)은 LED 어레이(30)로부터 출사되는 광이 입사되고, 상기 배면(48)에는 도광판(40)이 균일한 휘도 분포를 얻을 수 있도록 소정의 패턴을 가지는 격자부(도 2b의 11 참조)가 형성된다.Light incident from the LED array 30 is incident on the incident surface 42, and a grating portion having a predetermined pattern is formed on the rear surface 48 of the light guide plate 40 to obtain a uniform luminance distribution (see FIG. 2B). 11) is formed.
상기 출사면(46)에 형성되는 프리즘패턴(44)은 액정패널(미도시) 측에 면하도록 형성되는 것으로서, 도광판(40)으로부터의 광의 출사를 촉진 및 출사면(46)에서의 광의 출사강도를 균일하게 하기 위한 광집광 패턴이다.The prism pattern 44 formed on the exit surface 46 is formed to face the side of the liquid crystal panel (not shown), and promotes the emission of light from the light guide plate 40 and the intensity of the emission of the light on the exit surface 46. It is a light condensing pattern for making it uniform.
도 6에 도시된 바와 같이, 상기 프리즘패턴(44)은 도광판(40)의 가로방향 및 세로방향으로 각각 서로 인접되어 있으며 출사면(46)으로부터 도광판(40) 몸체 속으로 연속적으로 음각된 다수의 사각뿔 형태의 단위 패턴(44a)을 가진다. 상기 프리즘패턴(44)은 집광 효과와 균일한 휘도 특성을 형성시키기 위한 것이다.As shown in FIG. 6, the prism patterns 44 are adjacent to each other in the horizontal and vertical directions of the light guide plate 40, and are sequentially engraved in the body of the light guide plate 40 from the exit surface 46. It has a unit pattern 44a in the form of a square pyramid. The prism pattern 44 is for forming a light collecting effect and a uniform luminance characteristic.
상기 사각뿔 형태의 단위 패턴(44a)은 각각 삼각형 모양을 하며 각각 x,y축에 평행한 2개의 X면(43)과 2개의 Y면(45)으로 이루어지며, 오목한 사각뿔 프리즘 형태를 가진다. 따라서, 출사면(46)을 평면형태로 보면, 상기 단위 패턴(44a)은 사각형 형상을 한다. 상기 단위 패턴(44a)은 사각형의 가운데 부분(47)은 도광판(40)의 가장 깊숙히 파여지는 부분이고, 사각형의 각변(49)은 출사면(46)과 동일한 평면을 가진다. 상기 X면(43)은 z축으로부터 y축 방향으로 기울어져 들어오는 빛을 굴절시켜 액정패널의 방향인 z축으로 집광하고, Y면(45)은 z축으로부터 x축 방향으로 기울어져 들어오는 빛을 굴절시켜 z축으로 집광 한다.The unit pattern 44a having a quadrangular pyramid shape has a triangular shape, respectively, and consists of two X planes 43 and two Y planes 45 parallel to the x and y axes, respectively, and has a concave quadrangular pyramid prism shape. Therefore, when the exit surface 46 is viewed in a planar shape, the unit pattern 44a has a rectangular shape. The unit pattern 44a is the center portion 47 of the quadrangle is the deepest portion of the light guide plate 40, and each side 49 of the quadrangle has the same plane as the emission surface 46. The X plane 43 refracts the light that is inclined in the y-axis direction from the z-axis and condenses it in the z-axis which is the direction of the liquid crystal panel, and the Y plane 45 receives the light that is inclined in the x-axis direction from the z-axis. It is refracted and condensed on the z axis.
상기 반사판(50)은 출사면(46)에 대향되는 배면(48)에 근접되도록 설치되며, 알루미늄, 티타늄, 메탈 등과 같이 경면 재료를 플레이트(미도시)에 스퍼터링 증착, 코팅, 페인팅, 도금 등의 방법에 의해 형성시킨 것이다. 상기 반사판(50)은 도광판(40)의 배면(48)을 통해 누출될 수 있는 광을 도광판(40)의 내부로 전량 반사시켜 광 에너지의 손실을 방지하기 위한 것이다.The reflective plate 50 is installed to be close to the rear surface 48 opposite to the exit surface 46, and sputter deposition, coating, painting, plating, etc. on a plate (not shown) such as aluminum, titanium, and metal. It was formed by the method. The reflecting plate 50 reflects the light that may leak through the rear surface 48 of the light guide plate 40 to the inside of the light guide plate 40 to prevent loss of light energy.
상기와 같이 구성된 본 발명의 바람직한 실시예에 따른 이동통신 단말기의 액정표시소자용 백라이트 장치의 동작을 설명하면 다음과 같다.The operation of the backlight device for the liquid crystal display device of the mobile communication terminal according to the preferred embodiment of the present invention configured as described above is as follows.
구동회로에 의해 LED(32)가 점등되면, 조명광은 입사면(42)을 통해 도광판 (40) 내부에서 반사 되면서 진행된다. 여기서, 격자부에 부딪히는 조명광은 반복 복사, 내부 산란능에 의해 산란되어 출사면(46) 쪽으로 진행하고, 산란된 조명광 중 일부는 도광판(40)의 배면(48)으로 진행되지만 반사판(50)에 의해 반사되어 출사면(46) 쪽으로 진행된다. 도광판(40)은 액정패널 측으로 면광원을 균일하게 분포시킨다. 이 과정에서, 도광판(40)의 가로방향 및 세로방향으로 기울어진 빛은 프리즘패턴(44)을 통과하면서 액정패널 측으로 집광 되면서 입사된다.When the LED 32 is turned on by the driving circuit, the illumination light proceeds while being reflected inside the light guide plate 40 through the incident surface 42. Here, the illumination light that strikes the lattice portion is scattered by repeated radiation and internal scattering ability and proceeds toward the exit surface 46, and some of the scattered illumination light proceeds to the rear surface 48 of the light guide plate 40, but is reflected by the reflecting plate 50. Reflected and advanced toward the exit surface 46. The light guide plate 40 uniformly distributes the surface light source to the liquid crystal panel side. In this process, the light inclined in the horizontal and vertical directions of the light guide plate 40 is incident on the liquid crystal panel side while passing through the prism pattern 44.
상술한 바와 같이, 본 발명에 따른 이동통신 단말기의 액정표시소자용 백라이트 장치는 다음과 같은 효과를 가진다.As described above, the backlight device for the liquid crystal display of the mobile communication terminal according to the present invention has the following effects.
첫째, 도광판의 출사면에 형성되는 프리즘패턴을 출사면에 음각된 다수의 사각뿔 형태로 구성함으로써 집광의 균일성 및 높은 휘도 특성을 구현할 수 있다.First, since the prism pattern formed on the emission surface of the light guide plate is formed in the form of a plurality of square pyramids engraved on the emission surface, uniformity and high luminance characteristics of light condensation can be realized.
둘째, 프리즘패턴을 사각뿔 형태로 음각화 시킴으로써 빛의 손실량을 줄일 수 있으므로 백라이트 장치의 구조를 단순화 할 수 있다.Second, since the light loss can be reduced by engraving the prism pattern in the form of a square pyramid, the structure of the backlight device can be simplified.
셋째, 이동통신 단말기의 경우 종래의 프리즘패턴에 의해 발생되던 시야각 문제, 도광판 상면의 빛샘이나 빛의 얼룩 현상을 해소할 수 있으므로 이동통신 단말기의 컬러화 구현이 더욱 용이해 진다.Third, in the case of the mobile communication terminal, the viewing angle problem caused by the conventional prism pattern, the light leakage on the upper surface of the light guide plate, or the unevenness of light can be solved, thereby making the colorization of the mobile communication terminal easier.
본 발명은 구체적인 실시예를 통하여 설명되고 있으나, 본 발명은 상기 실시예에 한정하지 않고, 본 발명의 기술적 사상의 범위 내에서 통상의 지식을 가진 자라면 여러 가지 다양한 변형이 가능하다.Although the present invention has been described through specific embodiments, the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention.
Claims (2)
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020010018835A KR20010067948A (en) | 2001-04-10 | 2001-04-10 | A back light apparatus for liquid crystal display of mobile communication terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020010018835A KR20010067948A (en) | 2001-04-10 | 2001-04-10 | A back light apparatus for liquid crystal display of mobile communication terminal |
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| KR20010067948A true KR20010067948A (en) | 2001-07-13 |
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| KR20010069938A (en) * | 2001-05-21 | 2001-07-25 | 김현주 | A front light apparatus for liquid crystal display of personal digital assistant |
| KR100474153B1 (en) * | 2001-10-26 | 2005-03-08 | (주)에프아이티씨 | Condensing Film Consisting LCD Backlight Module |
| KR100906139B1 (en) * | 2007-06-22 | 2009-07-07 | 순천향대학교 산학협력단 | Light guiding plate and the manufacturing method thereof |
| US9664944B2 (en) | 2014-10-28 | 2017-05-30 | Samsung Display Co., Ltd. | Liquid crystal display device and method of fabricating the same |
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| US9664944B2 (en) | 2014-10-28 | 2017-05-30 | Samsung Display Co., Ltd. | Liquid crystal display device and method of fabricating the same |
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