KR0161452B1 - Backlight of liquid crystal display - Google Patents
Backlight of liquid crystal display Download PDFInfo
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- KR0161452B1 KR0161452B1 KR1019950040855A KR19950040855A KR0161452B1 KR 0161452 B1 KR0161452 B1 KR 0161452B1 KR 1019950040855 A KR1019950040855 A KR 1019950040855A KR 19950040855 A KR19950040855 A KR 19950040855A KR 0161452 B1 KR0161452 B1 KR 0161452B1
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- crystal display
- lcd
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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
- G02B6/0031—Reflecting 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
- G02B6/0033—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
- G02B6/0033—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
- G02B6/0055—Reflecting 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
- G02B6/007—Incandescent lamp or gas discharge lamp
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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
- 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
Abstract
액정 디스플레이(LCD;Liquid Crystal Display)에 관한 것으로서, 특히 박막트랜지스터(TFT;Thin Film Transistor) 액정 디스플레이(LCD;Liquid Crystal Display)의 백라이트에 관한 것이다.The present invention relates to a liquid crystal display (LCD), and more particularly to a backlight of a thin film transistor (TFT) liquid crystal display (LCD).
종래의 측면 반사판을 따로 사용하지 않고 백라이트 시트와 반사판을 이용해 봉합형(주머니 모양) 구조로 액정 디스플레이(LCD)의 백라이트를 형성함으로써 백라이트 시트의 각 시트 사이에 공간이 발생하지 않아 백라이트의 균일성(UNIFORMITY)이 향상되고 특히 백라이트의 각 측면에서 빛의 손실을 없앰으로써 백라이트의 광 효율을 향상시킬 수 있다.By using a backlight sheet and a reflecting plate to form a backlight of a liquid crystal display (LCD) using a backlight sheet and a reflecting plate without using a conventional side reflector, a space is not generated between the sheets of the backlight sheet so that the uniformity of the backlight ( UNIFORMITY can be improved and the light efficiency of the backlight can be improved by eliminating the loss of light, especially on each side of the backlight.
Description
제1도는 종래 기술에 의한 백라이트(BACKLIGHT)의 구조를 설명하기 위해 도시한 단면도이다.1 is a cross-sectional view illustrating the structure of a backlight according to the prior art.
제2도는 본 발명의 일 실시예를 설명하기 위해 도시한 단면도이다.2 is a cross-sectional view for explaining an embodiment of the present invention.
제3도는 본 발명의 다른 실시예를 설명하기 위해 도시한 단면도이다.3 is a cross-sectional view for explaining another embodiment of the present invention.
제4도는 본 발명의 또 다른 실시예를 설명하기 위해 도시한 단면도이다.4 is a cross-sectional view illustrating another embodiment of the present invention.
본 발명은 액정디스플레이(LCD:Liquid Crystal Display)에 관한 것으로서, 특히 박막트랜지스터(TFT:Thin Film Transistor) 액정디스플레이(LCD:Liquid Crystal Display)의 백라이트(BACKLIGHT)에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display (LCD), and more particularly to a backlight of a thin film transistor (TFT) liquid crystal display (LCD).
일반적인 액정 디스플레이(LCD)는 액정층의 전후에 액정층을 전기적으로 제어하는 전극과 입사광과 출사광을 제어하는 편광 소자로 이루어져 액정의 전기 광학적 효과에 의해 화상을 표시하는 비능동형 화상표시 장치이다.A general liquid crystal display (LCD) is a non-active type image display device which displays an image by the electro-optical effect of a liquid crystal, which consists of an electrode for electrically controlling the liquid crystal layer before and after the liquid crystal layer and a polarizing element for controlling incident light and output light.
이러한 액정 표시 소자는 화상 표시 상태에 따라 모노 크롬형과 칼라형으로 구별될 수 있으며, 광원과 관찰자의 위치에 따라 반사형과, 투과형으로 구별되는가 하면, 그 구동 구조에 따라 단순 매트릭스 형과 액티브 매트릭스(Active Matrix) 형으로 구별된다.Such liquid crystal display devices can be classified into monochrome type and color type according to the image display state, and are classified into reflective type and transmissive type according to the position of the light source and the observer, or simple matrix type and active matrix according to the driving structure thereof. It is classified as (Active Matrix) type.
액티브 매트릭스형이 단순 매트릭스형에 비하여 화질 및 응답속도 면에서 우수한데 박막트랜지스터 액정디스플레이(TFT LCD)가 여기에 속한다.The active matrix type is superior to the simple matrix type in terms of image quality and response speed, and a thin film transistor liquid crystal display (TFT LCD) is one of them.
박막트랜지스터 액정디스플레이는 정보를 표현하는 판낼부되 판낼부의 정보를 볼 수 있게 해주는 백라이트(BACKLIGHT) 광원부로 나뉜다.The thin film transistor liquid crystal display is divided into a panel for expressing information and a backlight source for allowing information of the panel to be viewed.
박막트랜지스터 액정디스플레이 판낼은 각 픽셀(Pixel)에 R, G, B의 칼라 필터(Color Filter)를 부착한 구조로 되어 있으며, 스위칭 트랜지스터는 박막트랜지스터(TFT)로 구성된다.The thin film transistor liquid crystal display panel has a structure in which color filters of R, G, and B are attached to each pixel, and the switching transistor is composed of a thin film transistor (TFT).
박막트랜지스터(TFT)는 MOSFET(Metal Oxide Semiconductor Field Effect Transistor)구조를 가지는 게이트(Gate), 드레인(Drain), 소스(Source)로 구성되고, 소스에는 캐패시터(Capacitor)회로에 등가되는 구조체가 연결되어 있고, 드레인에는 영상신호가 들어가는 입력구조로 되어 있다.The TFT is composed of a gate, a drain, and a source having a metal oxide semiconductor field effect transistor (MOSFET) structure, and a structure equivalent to a capacitor circuit is connected to the source. The drain has an input structure into which a video signal enters.
백라이트는 아크릴 계통의 도광판을 중심으로 그 하부에는 빛을 상측방향으로만 진행케하는 반사판이 있고, 그 상부에는 확산판, 프리즘 등의 다수개의 시트(Sheet)로 이루어진 백라이트 시트(BACKLIGHT SHEET)로 구성되어 있다.The backlight is composed of a backlight sheet consisting of a plurality of sheets, such as a diffuser plate and a prism, on the upper part of the acrylic light guide plate, and a reflecting plate for advancing light only upward. It is.
또한 백라이트는 도광판 측면의 램프(LAMP)가 광원으로 사용되고, 도광판과 각각의 시트를 밀착하거나 접착제로 부착하여 층층이 조립된다.In the backlight, a lamp (LAMP) on the side of the light guide plate is used as a light source, and a layer layer is assembled by bringing the light guide plate and each sheet into close contact or with adhesive.
제1도는 종래 기술에 의한 백라이트의 구조를 설명하기 위해 도시한 단면도이다.1 is a cross-sectional view illustrating the structure of a backlight according to the prior art.
참조 번호 1은 백라이트 시트를, 2는 도광판을, 3은 반사판을, 4는 램프를, 5는 램프 반사 시트를, 6은 측면 반사판을 나타낸다.Reference numeral 1 denotes a backlight sheet, 2 denotes a light guide plate, 3 denotes a reflecting plate, 4 denotes a lamp, 5 denotes a lamp reflective sheet, and 6 denotes a side reflecting plate.
a는 백라이트를 앞면에서 본 단면을, b는 위쪽에서 본 단면을, c는 b 단면에서 모서리 부분의 단면을 나타낸다.a is a cross section seen from the front of the backlight, b is a cross section viewed from above, and c is a cross section of an edge portion of the b cross section.
백라이트는, 상기 도광판(2)을 중심으로 하측에는 상기 반사판(3)과, 그 상측에는 다수개의 시트로 된 백라이트 시트(1)로 구성되어 있다.The backlight is composed of the reflecting plate 3 on the lower side of the light guide plate 2 and the backlight sheet 1 of a plurality of sheets on the upper side thereof.
상기 램프(4)로부터 생성된 빛은 상기 도광판(2)으로 전달되고 상기 백라이트 시트(1)를 통해 액정 디스플레이(LCD) 판낼로 발산된다.Light generated from the lamp 4 is transmitted to the light guide plate 2 and emitted through the backlight sheet 1 into the liquid crystal display (LCD) panel.
상기 도광판(2)은 상기 백라이트 시트(1)가 있는 상부를 제외한 모든 면에 반사물질로 차폐가 되어 있다.The light guide plate 2 is shielded with a reflective material on all surfaces except the upper portion where the backlight sheet 1 is located.
즉, 상기 도광판(2)의 하부에는 반사판(3)이 있고 상기 램프(4)가 부착된 상기 도광판(2)의 좌측면에는 램프 반사 시트(5), 그 이외의 세 측면에는 상기 측면반사판(6)이 존재한다.That is, the lower surface of the light guide plate 2 has a reflecting plate 3 and the lamp reflecting sheet 5 on the left side of the light guide plate 2 to which the lamp 4 is attached. 6) There is.
상기 도광판(2)은 3∼5㎜ 두께를 가지는 평평한 구조를 가지며, 한쪽면이 얇은 테이퍼형 구조를 가지는 것도 있다.The light guide plate 2 has a flat structure having a thickness of 3 to 5 mm, and may have a thin tapered structure on one side.
상기 백라이트 시트(1)는 확산판, 프리즘, 보호 시트등으로 이루어지고 각 특성에 따라 여러장을 겹쳐서 조립하는데, 이러한 백라이트 시트(1)는 조립할 때 편리하지만 시트와 시트 사이가 떠서 공간이 발생할 수 있고, 틈새가 형성되어 백라이트의 균일성(UNIFORMITY)에 영향을 준다.The backlight sheet 1 is composed of a diffusion plate, a prism, a protective sheet, and the like, and a plurality of sheets are stacked and assembled according to their characteristics. Gaps are formed, which affect the uniformity of the backlight.
특히 모서리면에서 여러개의 백라이트 시트(1)를 일치시키기 어렵기 때문에 틈새나 모서리 면에서의 빛의 손실로 백라이트의 효율면에서도 나쁜 영향을 미친다.In particular, since it is difficult to match a plurality of backlight sheets (1) in the corner surface, the loss of light in the gap or the corner surface adversely affects the efficiency of the backlight.
또한 상기 백라이트 시트(1)와 상기 도광판(2)을 일치시키는 데도 어려움이 있다.In addition, there is a difficulty in matching the backlight sheet 1 and the light guide plate 2.
따라서 본 발명의 목적은 빛 손실을 방지하기 위한 박막트랜지스터 액정디스플레이(TFT LCD)의 백라이트를 제공하기 위한 것이다.Accordingly, an object of the present invention is to provide a backlight of a thin film transistor liquid crystal display (TFT LCD) to prevent light loss.
상기 본 발명을 달성하기 위하여 다수개의 시트(Sheet)로 이루어진 백라이트 시트(BACKLIGHT SHEET), 도광판, 반사판이 차례로 존재하고 반사판 좌측에 램프를 구비한 액정 디스플레이(LCD;Liquid Crystal Display)의 백라이트(BACKLIGHT)에 있어서,In order to achieve the present invention, a backlight sheet composed of a plurality of sheets, a light guide plate, and a reflecting plate are sequentially present, and a backlight of a liquid crystal display (LCD) having a lamp on the left side of the reflecting plate. To
상기 도광판 상부의 백라이트 시트와 상기 도광판 하부의 반사판으로 상기 도광판의 우측면을 감싸 봉합형(주머니 모양) 구조의 백라이트를 형성하는 것을 특징으로 하는 액정 디스플레이(LCD)를 제공한다.A liquid crystal display (LCD) is provided by enclosing a right side surface of the light guide plate with a backlight sheet on the light guide plate and a reflective plate under the light guide plate to form a sealed (bag-shaped) backlight.
본 발명과 같이 종래의 측면 반사판을 따로 사용하지 않고 백라이트 시트와 반사판을 이용해 봉합형(주머니 모양) 구조로 액정 디스플레이(LCD)의 백라이트를 형성함으로써 백라이트 시트의 각 시트 사이에 공간이 발생하지 않아 백라이트의 균일성(UNIFORMITY)이 향상되고 특히 백라이트의 각 측면에서 빛의 손실을 없앰으로써 백라이트의 광효율을 향상시킬 수 있다.As in the present invention, the backlight of the liquid crystal display (LCD) is formed in a sealed (pocket) structure by using the backlight sheet and the reflector without using a conventional side reflector, so that no space is generated between the sheets of the backlight sheet. UNIIITY is improved and the light efficiency of the backlight can be improved by eliminating light loss on each side of the backlight.
이하 첨부한 도면을 참조하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제2도는 본 발명의 일 실시예를 설명하기 위해 도시한 단면도이다.2 is a cross-sectional view for explaining an embodiment of the present invention.
백라이트 시트(11)중 최상에 존재하는 시트와 최하에 존재하는 시트를 조금 더 길게하여 디귿(ㄷ)자의 대칭형으로 구부려서 도광판(12)과 그 하부의 반사판(13) 우측면을 감싸는 구조의 백라이트를 형성하였다.The backmost sheet and the bottommost sheet of the backlight sheet 11 are slightly longer to bend in a symmetrical form of a dichro to form a backlight having a structure surrounding the light guide plate 12 and the right side surface of the reflecting plate 13 below. It was.
제3도는 본 발명의 다른 실시예를 설명하기 위해 도시한 단면도이다.3 is a cross-sectional view for explaining another embodiment of the present invention.
백라이트 시트(11)중 최상의 존재하는 시트를 조금 더 길게하여 거억(ㄱ)자 모양으로 구부리고, 도광판(12) 아래에 존재하는 반사판(13)도 조금 더 길게하여 기억(ㄱ)자의 역상으로 구부려서 상기 반사판(13) 우측면을 감싸는 구조의 백라이트를 형성하였다.The best existing sheet of the backlight sheet 11 is slightly longer to bend in a shape of a memory (a), and the reflector plate 13 beneath the light guide plate 12 is also slightly longer to bend in the inverse of the memory (a). A backlight having a structure surrounding the right side of the reflecting plate 13 was formed.
제4도는 본 발명의 또 다른 실시예를 설명하기 위해 도시한 단면도이다.4 is a cross-sectional view illustrating another embodiment of the present invention.
도광판(12)을 끼워 넣을 수 있도록 상기 다수개의 시트로 이루어진 백라이트 시트(11)와 반사판(13)을 일체형으로 제작하여 백라이트를 형성한다.The backlight sheet 11 and the reflector plate 13 formed of the plurality of sheets may be integrally formed so as to sandwich the light guide plate 12 to form a backlight.
상기 실시예들에서와 같이 종래의 측면 반사판을 따로 사용하지 않고 백라이트 시트와 반사판을 이용해 봉합형(주머니 모양) 구조로 액정 디스플레이(LCD)의 백라이트를 형성함으로써 백라이트 시트의 각 시트 사이에 공간이 발생하지 않아 백라이트의 균일성(UNIFORMITY)이 향상되고 특히 백라이트의 각 측면에서 빛의 손실을 없앰으로써 백라이트의 광 효율을 향상시킬 수 있다.As in the above embodiments, a space is generated between the sheets of the backlight sheet by forming a backlight of the liquid crystal display (LCD) in a sealed (pocket) structure using the backlight sheet and the reflector without using a conventional side reflector separately. As a result, the uniformity of the backlight is improved, and in particular, the light efficiency of the backlight can be improved by eliminating light loss on each side of the backlight.
이상, 본 발명은 이에 한정되지 않으며, 많은 변형이 본 발명의 기술적 사상내에서 당 분야에서 통상의 지식을 가진 자에 의하여 가능함은 명백하다.As described above, the present invention is not limited thereto, and it is apparent that many modifications are possible by those skilled in the art within the technical spirit of the present invention.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950040855A KR0161452B1 (en) | 1995-11-11 | 1995-11-11 | Backlight of liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950040855A KR0161452B1 (en) | 1995-11-11 | 1995-11-11 | Backlight of liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970028702A KR970028702A (en) | 1997-06-24 |
| KR0161452B1 true KR0161452B1 (en) | 1999-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950040855A KR0161452B1 (en) | 1995-11-11 | 1995-11-11 | Backlight of liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0161452B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190046578A (en) | 2017-10-25 | 2019-05-07 | 알티전자 주식회사 | Link Type folderble hinge Structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990008720A (en) * | 1997-07-03 | 1999-02-05 | 윤종용 | Backlight Assembly of Liquid Crystal Display |
-
1995
- 1995-11-11 KR KR1019950040855A patent/KR0161452B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190046578A (en) | 2017-10-25 | 2019-05-07 | 알티전자 주식회사 | Link Type folderble hinge Structure |
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| Publication number | Publication date |
|---|---|
| KR970028702A (en) | 1997-06-24 |
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