KR100474153B1 - Condensing Film Consisting LCD Backlight Module - Google Patents

Condensing Film Consisting LCD Backlight Module Download PDF

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Publication number
KR100474153B1
KR100474153B1 KR10-2001-0066277A KR20010066277A KR100474153B1 KR 100474153 B1 KR100474153 B1 KR 100474153B1 KR 20010066277 A KR20010066277 A KR 20010066277A KR 100474153 B1 KR100474153 B1 KR 100474153B1
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South Korea
Prior art keywords
light
present
film
light collecting
lcd backlight
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KR10-2001-0066277A
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Korean (ko)
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KR20030034620A (en
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변석용
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(주)에프아이티씨
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Publication of KR20030034620A publication Critical patent/KR20030034620A/en
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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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
    • 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
    • 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
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G02F1/133507—Films for enhancing the luminance

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

Abstract

본 발명은 LCD 백라이트 모듈에 있어서, 광원으로부터 발생되는 빛이 도광판과 확산 필름을 지나 액정모듈에 입사하기 전에 위치하는 집광필름에 관한 것으로, 수십 ㎛에서 수백 ㎛ 폭을 갖는 꼭지점이 빛의 출사방향을 향하는 피라미드구조에 입사쪽을 향하고 폭이 절반인 피라미드 구조를 제거한 형상을 갖는다. 본 발명의 집광필름은 집광 성능을 크게 향상시키고, 전체적인 휘도가 증가하여 광원에서의 전력 소모를 줄일 수 있으며, 도광판의 크기 와 형태에 상관없이 적용 가능하여 그 효용성이 매우 크다. 따라서 본 발명은 전력 소모량이 적고 전체적인 휘도가 향상된 LCD 백라이트의 제조를 가능하게 한다.The present invention relates to a light collecting film in which the light emitted from the light source passes through the light guide plate and the diffusing film and then enters the liquid crystal module. It has a shape in which the pyramid structure having a half width and facing toward the entrance side is removed. The light collecting film of the present invention can greatly improve the light collecting performance, increase the overall luminance, and reduce power consumption in the light source, and can be applied regardless of the size and shape of the light guide plate. Accordingly, the present invention enables the manufacture of LCD backlights with low power consumption and improved overall brightness.

Description

엘씨디(LCD) 백라이트 모듈을 구성하는 집광필름{Condensing Film Consisting LCD Backlight Module}Condensing Film Consisting LCD Backlight Module for LCD Backlight Module

본 발명은 LCD 백라이트 모듈에 있어서, 광원으로부터 나온 빛이 도광판과 확산필름을 거쳐 나올 때 발생하는 중심각 휘도 저하를 보상하기위해 불필요한 시야각 영역의 빛을 모아주는 집광필름에 관한 것이다.현재 LCD 백라이트 모듈은 노트북, 모니터, PDA등 거의 대부분의 화상표시장치에 적용되고 있으며 IMT2000 과 같은 모바일 장치가 보편화 되면 그 수요는 지금보다 더 많아 질 것으로 예상된다.이런 모바일 장치에 있어서의 문제점은 전력소모량이 디스플레이에 집중되어 주어진 배터리로 장시간 작업할 수 없다는데 있다.이런 문제점을 해결하기 위해서는 보다 적은 전력에 높은 휘도값을 갖는 백라이트 모듈이 요구되어진다.The present invention relates to an LCD backlight module, which collects light in an unnecessary viewing angle region in order to compensate for a decrease in center-angle luminance generated when light from a light source passes through a light guide plate and a diffusion film. It is applied to almost all image display devices such as laptops, monitors, PDAs, etc., and when mobile devices such as IMT2000 become more common, the demand is expected to be higher than that of the present. In order to solve such a problem, a backlight module having a high luminance value with less power is required.

삭제delete

본 발명은 도광판과 확산필름을 거쳐 나온 빛이 액정 모듈에 들어가기 전에 집광을 목적으로 사용되어온 종래의 기술보다 집광효율을 높여 유효 시야각 내의 휘도를 높여 최종적으로 디스플레이 장치의 전력소모를 줄이는데 있다.The present invention is to reduce the power consumption of the display device by increasing the luminous efficiency in the effective viewing angle by increasing the light condensing efficiency than the conventional technology that has been used for the purpose of condensing the light emitted through the light guide plate and the diffusion film before entering the liquid crystal module.

본 발명은 LCD 백라이트 모듈에 있어서, 꼭지점이 빛의 진행 방향을 향하는 큰 피라미드 구조에서 꼭지점이 빛의 진행 방향과 반대 방향을 향하는 작은 피라미드 구조를 제거한 형태의 셀을 배열시킨 형상을 가지고 램프에서 나와 도광판과 확산필름을 거쳐 나온 빛을 모아주는 집광 역할을 하는 집광필름에 관한 것이다.In the LCD backlight module, the light guide plate is formed by arranging cells in a shape in which a large pyramid structure in which a vertex points toward a light propagation direction is arranged in a cell in which a small pyramid structure in which a vertex point is opposite to a light travel direction is arranged. And it relates to a light collecting film that serves to collect the light emitted through the diffusion film.

큰 피라미드 구조의 밑변의 길이는 수십 ㎛ 에서 수백 ㎛ 의 범위를 가지며 작은 피라미드 구조의 밑변의 길이는 그 절반 길이 범위를 가진다.큰 피라미드 구조의 밑변 길이는 사람 눈의 해상도를 고려한 크기이며 작은 피라미드 구조의 밑변 길이는 집광필름에 요구되는 전반사 조건을 만족하기 위함이다.The base length of the large pyramid structure ranges from several tens of micrometers to hundreds of micrometers, and the base length of the small pyramid structure ranges from half its length. The base length of is to satisfy the total reflection condition required for the light collecting film.

본 발명의 집광필름은 종전 기술의 집광필름이 한 방향의 집광 능력을 가지고 있는 반면에 양 방향의 집광 능력을 동시에 가지는 것을 특징으로 한다.The light collecting film of the present invention is characterized in that the light collecting film of the prior art has the light collecting ability in one direction while simultaneously having the light collecting ability in both directions.

종래 기술의 구성은 도 1의 6이 광원인 램프 길이에 수직한 방향의 프리즘 배열을 가지는 집광 필름에 도 1의 7이 램프 길이에 평행한 방향의 프리즘 배열을 가지는 집광 필름으로 구성되는데 비해 본 발명에 의한 LCD 백라이트는 도 1의 6이나 7이 도 3-1의 집광 필름으로 구성된다.도 5는 종래 기술의 집광필름을 이용한 적층 구조의 실시 예로 ASAP 프로그램으로 집광효율을 수치 계산한 결과를 나타낸 그래프 이고, 도 6은 본 발명에 의한 집광필름을 이용한 실시 예로 도 1의 6의 위치에 90° 프리즘 배열을 가지는 집광필름이 위치하고 구성으로 도 1의 7의 위치에 본 발명에 의한 집광필름이 적층 되어있는 구성의 조합을 수치 계산한 결과를 나타낸 그래프로 종래기술을 이용한 조합보다 상당한 휘도 개선 효과가 있음을 알 수 있다. The prior art configuration is composed of a light collecting film having a prism array in a direction perpendicular to the lamp length 6 of FIG. 1 and a light collecting film having a prism array in a direction parallel to the lamp length 7 of FIG. 1. In the LCD backlight according to the present invention, 6 or 7 of FIG. 1 is composed of the light collecting film of FIG. 3-1. FIG. 5 is an example of a laminated structure using a light collecting film of the prior art. 6 is a graph showing an embodiment using a light collecting film according to the present invention, in which the light collecting film having a 90 ° prism array is positioned at the position of 6 in FIG. It is a graph showing the result of numerical calculation of the combination of the configuration, it can be seen that there is a significant brightness improvement effect than the combination using the prior art.

본 발명에 의하면 새로운 집광 필름을 제공하여, 집광성능을 크게 향상시켜 유효 시야각 내의 휘도가 증가하여 LCD 백라이트 모듈의 전력 소모를 줄일 수 있다. 본 발명의 집광필름은 도광판의 종류에 상관 없이 적용 가능하며 모바일 용으로 제작되어지는 LED광원을 사용하는 LCD 백라이트에도 적용 가능하여 그 효용성이 매우 크다. 따라서 본 발명은 전력소모량이 적고 배터리의 동작시간 및 유효 시야각내의 휘도가 향상된 LCD 백라이트 제작을 가능하게 한다.한편, 본 발명은 하나의 특정한 실시예를 도시하며 설명하였지만, 본 발명이 당 업자에 의해 다양하게 변형되어 실시될 가능성이 있는 것은 자명한 일이다. 이러한 변형된 실시 예들은 본 발명의 기술적 사상이나 관점으로부터 개별적으로 이해되어서는 안되며 이러한 변형된 실시 예들은 본 발명의 첨부된 특허청구의 범위 안에 속한다 해야 할 것이다.According to the present invention, by providing a new light condensing film, the light condensing performance can be greatly improved, and the luminance within the effective viewing angle is increased, thereby reducing power consumption of the LCD backlight module. The light collecting film of the present invention is applicable regardless of the type of light guide plate and is also applicable to an LCD backlight using an LED light source manufactured for mobile, and its utility is very high. Thus, the present invention enables the fabrication of LCD backlights with low power consumption and improved brightness within the operating time and effective viewing angle of the battery. Meanwhile, while the present invention has been illustrated and described in one specific embodiment, the present invention has been described by those skilled in the art. It is obvious that various modifications can be made. Such modified embodiments should not be understood individually from the technical idea or point of view of the present invention and these modified embodiments should fall within the scope of the appended claims of the present invention.

도 1은 LCD 백라이트의 기본 구조를 나타낸 단면도 이다.1 is a cross-sectional view showing the basic structure of the LCD backlight.

도 2-1의 (a)는 도 1에 표시한 6이나 7을 구성하는 종래기술의 집광필름을 상단에서 바라본 그림이다.Figure 2-1 (a) is a view from the top of the prior art light collecting film constituting 6 or 7 shown in FIG.

도 2-1의 (b)는 도 1에 표시한 6이나 7을 동시에 구성하는 종래기술의 집광필름을 측면에서 바라본 그림이다.도 2-2의 (a)는 종래기술의 실시 예로 종래기술의 집광필름을 이용한 적층 구조를 가지는 조합으로 도1에 정의한 Y-Z 평면으로 바라본 그림이다.도 2-2의 (a)는 종래기술의 실시 예로 종래기술의 집광필름을 이용한 적층 구조를 가지는 조합으로 도1에 정의한 Y-X 평면으로 바라본 그림이다.도 3-1의 (a)는 도 1에 표시한 6이나 7을 구성하는 본 발명에 의한 집광필름을 상단에서 바라본 그림이다.도 3-1의 (b)는 도 1에 표시한 6이나 7을 구성하는 본 발명에 의한 집광필름을 측면에서 바라본 그림이다.도 3-2의 (a)는 본 발명에 의한 실시 예로 본 발명의 집광필름을 이용한 적층 구조를 가지는 조합으로 도1에 정의한 Y-Z 평면으로 바라본 그림이다.도 3-2의 (b)는 본 발명에 의한 실시 예로 본 발명의 집광필름을 이용한 적층 구조를 가지는 조합으로 도1에 정의한 Y-X 평면으로 바라본 그림이다.Figure 2-1 (b) is a side view of the prior art light collecting film constituting simultaneously 6 or 7 shown in Figure 1. Figure 2-2 (a) is a prior art embodiment of the prior art Fig. 2-2 is a combination having a laminated structure using a light collecting film of the prior art as an example of the prior art. Fig. 3-1 (a) is a view of the light collecting film according to the present invention constituting 6 or 7 shown in Fig. 1 as viewed from the top. Fig. 3-1 (b). Figure 1 is a view from the side of the light collecting film according to the present invention constituting 6 or 7 shown in Figure 1. Figure 3-2 (a) shows a laminated structure using the light collecting film of the present invention according to an embodiment of the present invention. Fig. 3-2 (b) shows a view taken along the YZ plane defined in Fig. 1 as a combination. In combination with the example embodiment a laminated structure using a light collecting film of the present invention according to the invention is an illustration as viewed in Y-X plane defined in FIG.

도 3-3의 (a)는 본 발명에 의한 실시 예로 도1의 6에 90°프리즘 배열로 이루어진 집광필름과 도 3-1과 같은 본 발명의 집광필름을 이용한 적층 구조를 가지는 조합으로 도1에 정의한 Y-Z 평면으로 바라본 그림이다.Figure 3-3 (a) is a combination according to an embodiment of the present invention having a laminated structure using a light condensing film made of a 90 ° prism array in Figure 6 and the light condensing film of the present invention as shown in Figure 3-1 This is a view from the YZ plane defined in.

도 3-3의 (b)는 본 발명에 의한 실시 예로 도1의 6에 90°프리즘 배열로 이루어진 집광필름과 도 3-1과 같은 본 발명의 집광필름을 이용한 적층 구조를 가지는 조합으로 도1에 정의한 Y-X 평면으로 바라본 그림이다.Figure 3-3 (b) is a combination according to the embodiment of the present invention having a laminated structure using a light condensing film made of a 90 ° prism array in Fig. 1 of 6 and the light condensing film of the present invention as shown in Fig. 3-1. This is the view from the YX plane defined in.

도 4는 도 1에 표시한 5를 통과하여 나오는 빛의 휘도 분포를 나타낸 그래프이다.4 is a graph illustrating a luminance distribution of light emitted through 5 shown in FIG. 1.

도 5는 도 1의 구성에 도 1에 표시한 6과 7에 도 2-2에 나타낸 종래기술의 집광필름을 이용한 적층 구조에서의 집광 성능을 ASAP 프로그램으로 수치 계산한 결과를 나타낸 그래프이다.FIG. 5 is a graph showing the results of numerical calculation of the light collecting performance in the laminated structure using the light collecting film of the prior art shown in FIGS. 2-2 and 6 and 7 shown in FIG.

도 6은 본 발명에 의한 실시 예로서 도 3-3의 적층 구조를 가지는 조합의 집광 성능을 ASAP 프로그램으로 수치 계산한 결과를 나타낸 그래프이다.＊＊＊ 도면의 주요부분에 대한 부호의 설명 ＊＊＊1: 광원2: 반사갓3: 도광판4: 반사판5: 확산필름6, 7: 집광필름Fig. 6 is a graph showing the results of numerical calculation of the light condensing performance of the combination having the laminated structure of Fig. 3-3 by the ASAP program as an embodiment of the present invention. * 1: light source 2: reflection shade 3: light guide plate 4: reflecting plate 5: diffuser film 6, 7: light collecting film

Claims (3)

LCD 백라이트 모듈에 있어서, 밑변의 길이가 수십 ㎛에서 수백 ㎛ 길이를 갖고 꼭지점이 빛의 진행 방향쪽에 위치하는 피라미드 형상에서 밑변의 길이가 절반이고 꼭지점이 빛의 진행 방향과 반대쪽에 위치하는 피라미드 형상을 제거한 구조를 가지는 셀 들의 배열로 구성된 LCD 백라이트용 집광필름.In the LCD backlight module, a pyramid shape having a base length of several tens of micrometers to hundreds of micrometers and having a vertex located in the direction of light travel is half a pyramidal shape having a half length and a vertex located opposite to a light travel direction. Condensing film for LCD backlight consisting of an array of cells with a removed structure. 청구항 1에 있어서, 상기 셀들의 배열에 있어서 각각의 셀의 높이가 일정한 범위 내에서 서로 다른 값을 갖는 집광필름.The condensing film of claim 1, wherein the height of each cell in the arrangement of the cells has a different value within a predetermined range. 청구항 1에 있어서, 형상이 올라가는 기재 필름이 확산기능을 하는 집광필름.The condensing film of claim 1, wherein the base film having a raised shape serves as a diffusion function.
KR10-2001-0066277A 2001-10-26 2001-10-26 Condensing Film Consisting LCD Backlight Module KR100474153B1 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06308485A (en) * 1993-04-21 1994-11-04 Hitachi Ltd Display device
JPH07114025A (en) * 1993-10-20 1995-05-02 Sharp Corp Liquid crystal display device
JPH07287127A (en) * 1994-04-19 1995-10-31 Dainippon Printing Co Ltd Film lens for surface light source and surface light source using the same
KR20010058166A (en) * 1999-12-24 2001-07-05 박종섭 Prism sheet for back light unit
KR20010067948A (en) * 2001-04-10 2001-07-13 김현주 A back light apparatus for liquid crystal display of mobile communication terminal
KR20010081523A (en) * 2000-02-15 2001-08-29 구본준, 론 위라하디락사 Sheet Type Optical Device and Method Of Fabricating The Same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06308485A (en) * 1993-04-21 1994-11-04 Hitachi Ltd Display device
JPH07114025A (en) * 1993-10-20 1995-05-02 Sharp Corp Liquid crystal display device
JPH07287127A (en) * 1994-04-19 1995-10-31 Dainippon Printing Co Ltd Film lens for surface light source and surface light source using the same
KR20010058166A (en) * 1999-12-24 2001-07-05 박종섭 Prism sheet for back light unit
KR20010081523A (en) * 2000-02-15 2001-08-29 구본준, 론 위라하디락사 Sheet Type Optical Device and Method Of Fabricating The Same
KR20010067948A (en) * 2001-04-10 2001-07-13 김현주 A back light apparatus for liquid crystal display of mobile communication terminal

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