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KR100766959B1 - Mold frame combining structure of liquid crystal display device for improving light efficiency - Google Patents

Mold frame combining structure of liquid crystal display device for improving light efficiency Download PDF

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Publication number
KR100766959B1
KR100766959B1 KR1020010063807A KR20010063807A KR100766959B1 KR 100766959 B1 KR100766959 B1 KR 100766959B1 KR 1020010063807 A KR1020010063807 A KR 1020010063807A KR 20010063807 A KR20010063807 A KR 20010063807A KR 100766959 B1 KR100766959 B1 KR 100766959B1
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South Korea
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liquid crystal
mold frame
guide plate
light guide
lamp
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KR1020010063807A
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Korean (ko)
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KR20030032204A (en
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정윤환
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삼성에스디아이 주식회사
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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
    • 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]
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/46—Fixing elements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Liquid Crystal (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)

Abstract

본 발명의 목적은 LED 램프에서 발광된 빛의 손실을 최대한 줄여 빛효율을 향상시키기 위한 액정표시장치 모듈의 결합구조를 제공하는 것으로, 액정표시장치의 몰드 프레임 결합구조는, 액정패널과, 상기 액정패널의 하부에 위치하여 빛을 분산시키는 도광판과, 상기 도광판으로 빛을 발광하는 램프가 설치된 FPC와, 상기 도광판, 램프 및 액정패널의 일부가 내측에 설치되는 몰드 프레임을 포함하고, 상기 도광판의 측면에 램프가 밀착된 상태에서 도광판과 램프의 측면이 몰드 프레임의 내측에 밀착되도록 끼워맞춤 삽입된다.An object of the present invention is to provide a coupling structure of a liquid crystal display module for improving the light efficiency by reducing the loss of light emitted from the LED lamp to the maximum, the mold frame coupling structure of the liquid crystal display device, the liquid crystal panel and the liquid crystal A light guide plate disposed below the panel to disperse light, an FPC having a lamp for emitting light to the light guide plate, and a mold frame in which a part of the light guide plate, the lamp and the liquid crystal panel are installed, and a side surface of the light guide plate In the state in which the lamp is in close contact with the lamp, the light guide plate and the side surfaces of the lamp are fitted into the mold frame to be in close contact with each other.

액정, 도광판, 램프, TAB, 몰드 프레임LCD, LGP, Lamp, TAB, Mold Frame

Description

빛효율을 향상시키기 위한 액정표시장치의 몰드 프레임 결합구조{Uniting Structure Of LCD Mold Frame For Improving Light Of Efficiency}Uniting Structure Of LCD Mold Frame For Improving Light Of Efficiency

도 1은 종래 몰드 프레임이 결합된 액정표시장치를 도시한 사시도.1 is a perspective view illustrating a liquid crystal display device in which a conventional mold frame is coupled.

도 2는 도 1의 A-A에서 도시한 단면도.FIG. 2 is a sectional view taken along the line A-A of FIG. 1; FIG.

도 3은 본 발명에 따른 액정표시장치를 도시한 사시도.3 is a perspective view showing a liquid crystal display device according to the present invention;

도 4는 도 3의 D-D에서 도시한 단면도.4 is a cross-sectional view shown in D-D of FIG.

본 발명은 액정표시장치에 관한 것으로, 보다 상세하게는 몰드 구조를 개선하여 빛효율을 향상시킨 액정표시장치의 몰드 프레임 결합구조에 관한 것이다.The present invention relates to a liquid crystal display device, and more particularly, to a mold frame coupling structure of a liquid crystal display device having improved light structure and improved light efficiency.

일반적으로 액정표시장치(Liquid Crystal Display)는 외부로부터 인가되는 전압에 의해 액정의 배열 방향이 변화되는 유전이방성을 이용하여, 백라이트로부터 조사된 광(光)을 선택적으로 투과시켜 문자나 숫자 혹은 기타 임의의 아이콘을 표시하는 장치이다.In general, a liquid crystal display uses dielectric anisotropy in which the arrangement direction of liquid crystals is changed by a voltage applied from the outside, and selectively transmits light irradiated from the backlight to generate letters, numbers, or other arbitrary matters. The device displays the icon.

이러한 액정표시장치는 평행하게 배치된 투명한 2매의 글라스기판의 대향면에 ITO 투명전극을 형성하고, 그 내부에 액정물질을 주입하여 밀봉한 구조이다. Such a liquid crystal display has a structure in which an ITO transparent electrode is formed on opposite surfaces of two transparent glass substrates arranged in parallel, and a liquid crystal material is injected into the liquid crystal material.                         

도 1에서는 종래 휴대폰에 채용되는 액정표시장치를 사시도로 나타내고 있고, 도 2는 도 1의 A-A에서 도시한 단면도를 나타내고 있다.In FIG. 1, a liquid crystal display device employed in a conventional mobile phone is shown in a perspective view, and FIG. 2 is a cross-sectional view shown in FIG.

액정표시장치는 상부 및 하부 글라스기판(3a,3b)과 양기판(3a,3b) 사이에 주입된 액정으로 이루어지며 몰드 프레임(1)의 내측에 설치되는 액정패널(3)과, 액정패널(3)의 하부에 위치한 도광판(5)과, 빛을 발광하는 LED 램프(7)를 구비하며 도광판(5)의 측면에 결합되는 FPC(Flexible Printed Circuit)(9)를 포함하여 이루어진다.The liquid crystal display device is composed of liquid crystal injected between the upper and lower glass substrates 3a and 3b and the positive substrates 3a and 3b and is provided inside the mold frame 1, and the liquid crystal panel ( 3) and a flexible printed circuit (FPC) 9 having a light guide plate 5 positioned below the light guide plate and an LED lamp 7 emitting light, and coupled to a side surface of the light guide plate 5.

이러한 종래 구조에서 LED 램프(7)에서 발광된 빛은 도광판(5)을 통해 골고루 분산된 후 액정을 통과하여 화상을 표시하게 되며, 몰드 프레임(1)은 LED 램프(7)에서 발광되는 빛이 손실되지 않고 액정을 통과할 수 있도록 하고 있다.In the conventional structure, the light emitted from the LED lamp 7 is evenly distributed through the light guide plate 5 and then passes through the liquid crystal to display an image, and the mold frame 1 emits light emitted from the LED lamp 7. It allows the liquid crystal to pass through without being lost.

그러나, 도 1에 도시한 바와 같이, 도광판의 네 측면 중 두 측면이 몰드 프레임과 밀착되지 못하고, 상기 측면에서 몰드 프레임과의 사이에 "B" 와 "C" 만큼의 공간이 형성됨으로써 LED 램프에서 발생된 빛이 도광판을 향해 제대로 전달되지 못함과 아울러, 도광판에 전달된 빛 중 일부가 상기 두 측면에서 외부로 빠져나가게 된다.However, as shown in FIG. 1, two of four side surfaces of the light guide plate are not in close contact with the mold frame, and spaces such as “B” and “C” are formed between the mold frames in the LED lamps. The generated light is not properly transmitted toward the light guide plate, and some of the light transmitted to the light guide plate exits from the two sides.

이러한 현상으로 인하여 LED 램프의 빛효율이 10% 내지 30% 떨어지는 원인이 되고 있다.This phenomenon causes a 10% to 30% drop in light efficiency of the LED lamp.

본 발명은 상술한 문제점을 해결하기 위하여 안출된 것으로, LED 램프에서 발광된 빛의 손실을 최대한 줄여 빛효율을 향상시키기 위한 액정표시장치 모듈의 결합구조를 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, and an object thereof is to provide a coupling structure of a liquid crystal display module for improving the light efficiency by reducing the loss of light emitted from the LED lamp to the maximum.

상기와 같은 목적을 달성하기 위해서 본 발명의 액정표시장치의 몰드 프레임 결합구조는, 액정패널과, 상기 액정패널의 하부에 위치하여 빛을 분산시키는 도광판과, 상기 도광판으로 빛을 발광하는 램프가 설치된 FPC와, 상기 도광판, 램프 및 액정패널의 일부가 내측에 설치되는 몰드 프레임을 포함하고, 상기 도광판의 측면에 램프가 밀착된 상태에서 도광판과 램프의 측면이 몰드 프레임의 내측에 밀착되도록 끼워맞춤 삽입된다.In order to achieve the above object, the mold frame coupling structure of the liquid crystal display device of the present invention includes a liquid crystal panel, a light guide plate disposed below the liquid crystal panel to disperse light, and a lamp for emitting light to the light guide plate. And a mold frame in which a part of the light guide plate, the lamp, and the liquid crystal panel are installed inside, and the fitting of the light guide plate and the side of the lamp is in close contact with the inside of the mold frame while the lamp is in close contact with the side of the light guide plate. do.

여기서 액정패널의 두 글라스기판의 크기가 다르고, 두 글라스기판 중에서 작은 크기의 하부 글라스기판이 몰드 프레임의 내측에 끼워맞춤 삽입되는 것이 바람직하다.Here, it is preferable that the sizes of the two glass substrates of the liquid crystal panel are different, and the lower glass substrate having a smaller size among the two glass substrates is fitted into the mold frame.

그리고, 두 글라스기판에 접속된 TAB은 몰드 프레임의 외측으로 배치되는 것이 바람직하다.The TAB connected to the two glass substrates is preferably disposed outside the mold frame.

이하, 첨부된 도면에 의거하여 본 발명에 따른 바람직한 실시예를 상세히 설명한다. 도 3은 본 발명에 따른 액정표시장치를 도시한 사시도이고, 도 4는 도 3의 D-D에서 도시한 단면도이다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 3 is a perspective view illustrating a liquid crystal display according to the present invention, and FIG. 4 is a cross-sectional view taken along line D-D of FIG. 3.

본 발명의 액정표시장치는 액정패널(11)과, 액정패널(11)의 하부에 위치한 도광판(13)과, 빛을 발광하는 LED 램프(15)가 설치된 FPC(17)와, 도광판(13)과 액정패널(11)의 일부가 내측에 설치되는 몰드 프레임(19)으로 이루어진다.The liquid crystal display of the present invention includes a liquid crystal panel 11, a light guide plate 13 positioned below the liquid crystal panel 11, an FPC 17 provided with an LED lamp 15 for emitting light, and a light guide plate 13. And a part of the liquid crystal panel 11 includes a mold frame 19 provided inside.

액정패널(11)은 통상적으로 2매의 글라스기판 사이에 사이드 글라스를 배치 하여 액정이 주입될 수 있는 공간을 형성하고, 글라스기판에 전극을 배열 형성하여 전극으로 인가되는 전기에 의해 액정의 자세를 변화시켜서 빛을 통과하게 함으로써 화상을 표시하며, 각각의 글라스기판에는 커먼전극과 어드레스 전극과 접속된 TAB(Tape Automated Bonding)(21a)(21b)이 설치되는 구조이다.In the liquid crystal panel 11, a side glass is usually disposed between two glass substrates to form a space in which liquid crystal can be injected, and electrodes are arranged on the glass substrate to adjust the posture of the liquid crystal by electricity applied to the electrodes. The image is displayed by changing the light to pass through it, and each glass substrate is provided with a TAB (Tape Automated Bonding) 21a and 21b connected to the common electrode and the address electrode.

특히 본 발명에서 사용되는 액정패널(11)은 2매의 글라스기판의 크기가 다른 것이 특징이며, 도 4를 기준으로 하측에 위치한 하부 글라스기판(11a)이 몰드 프레임(19)의 내측에 삽입됨으로 상부 글라스기판(11b)보다 작은 크기이다.In particular, the liquid crystal panel 11 used in the present invention is characterized in that the size of the two glass substrates are different, the lower glass substrate (11a) located on the lower side based on Figure 4 is inserted into the mold frame 19 It is smaller than the upper glass substrate 11b.

하부 글라스기판(11a)의 삽입시 하부 글라스기판(11a)의 세측면 가장자리는 몰드 프레임(19)의 내측에 밀착되도록 삽입된다.When the lower glass substrate 11a is inserted, three side edges of the lower glass substrate 11a are inserted to be in close contact with the inside of the mold frame 19.

그리고 몰드 프레임(19)의 내측에서, 하부 글라스기판(11a)의 하측에 위치한 도광판(13)과 LED 램프(15)는 하부 글라스기판(11a)과 마찬가지로 몰드 프레임(19)의 내측에 끼워맞춤되도록 삽입되는 것이 바람직하다.Inside the mold frame 19, the light guide plate 13 and the LED lamp 15 positioned below the lower glass substrate 11a are fitted to the inside of the mold frame 19 like the lower glass substrate 11a. It is preferred to be inserted.

이상과 같이 구성되는 본 발명에 따른 액정표시장치의 몰드 프레임 결합구조는 다음과 같은 과정을 거쳐 결합되어진다.The mold frame coupling structure of the liquid crystal display device according to the present invention configured as described above is coupled through the following process.

몰드 프레임(19)의 하부에서 몰드 프레임(19)의 내측으로 도광판(13)과 LED 램프(15)를 끼워맞춤하여 삽입하고, 몰드 프레임(19)의 상부에서 액정패널(11)의 하부 글라스기판(11a)이 몰드 프레임(19)의 내측에 안착되도록 삽입한다.The light guide plate 13 and the LED lamp 15 are fitted into the mold frame 19 from the lower part of the mold frame 19, and the lower glass substrate of the liquid crystal panel 11 is mounted on the mold frame 19. Inserted so that 11a is seated inside the mold frame 19.

이에 따라, LED 램프(15)에서 발광된 빛은 손실없이 도광판(13)으로 전달되고, 도광판(13)에서 골고루 분사된 빛이 액정패널(11)을 통과함으로써 빛효율이 향상된다. Accordingly, the light emitted from the LED lamp 15 is transmitted to the light guide plate 13 without loss, and the light efficiency evenly injected from the light guide plate 13 passes through the liquid crystal panel 11, thereby improving light efficiency.                     

그리고 액정패널(11)의 두 TAB(21a)(21b)은 몰드 프레임(19)의 외측으로 배치된 후, 도시 생략된 PCB에 부착되어진다.The two TABs 21a and 21b of the liquid crystal panel 11 are disposed outside the mold frame 19 and then attached to the PCB (not shown).

이상에서 살펴본 바와 같이 본 발명에 따른 액정표시장치의 몰드 프레임 결합구조에 의하면, 몰드 프레임의 내측에 종래 액정표시장치에서와 같은 "B" 및 "C"와 같은 공간이 없기 때문에, LED 램프에서 발광된 빛은 손실없이 도광판으로 전파되고, 전파된 빛은 도광판에서 골고루 분사되어 액정패널을 향하게 된다.As described above, according to the mold frame coupling structure of the liquid crystal display device according to the present invention, since there is no space such as "B" and "C" in the mold frame as in the conventional liquid crystal display device, light is emitted from the LED lamp. The transmitted light is propagated to the light guide plate without loss, and the propagated light is evenly sprayed from the light guide plate to face the liquid crystal panel.

따라서, 종래에 비해 빛효율이 30% 정도 향상되고, 나아가 액정패널의 휘도가 종래 1200cd/m2에서 1700cd/m2 로 40% 이상 향상된다.Accordingly, the light efficiency is improved by 30% as compared with the conventional, and further the luminance of the liquid crystal panel is improved by more than 40% up to 1700cd / m 2 in the prior 1200cd / m 2.

그리고 몰드 프레임의 크기를 줄이게 되어 액정표시장치가 사용되는 전자제품의 사이즈도 줄일 수 있는 효과가 있다.In addition, since the size of the mold frame is reduced, the size of the electronic product using the liquid crystal display device can be reduced.

Claims (2)

액정패널과, 상기 액정패널의 하부에 위치하여 빛을 분산시키는 도광판과, 상기 도광판으로 빛을 발광하는 램프가 설치된 FPC와, 상기 도광판, 램프 및 액정패널의 일부가 내측에 설치되는 몰드 프레임을 포함하고,A liquid crystal panel, a light guide plate disposed below the liquid crystal panel to disperse light, an FPC having a lamp that emits light through the light guide plate, and a mold frame in which a part of the light guide plate, the lamp, and the liquid crystal panel is installed. and, 상기 액정패널은 두 글라스기판의 크기가 다르고, 상기 두 글라스기판 중에서 작은 크기의 하부 글라스기판이 상기 몰드 프레임의 내측에 끼워맞춤 삽입되며, 상기 도광판의 측면에 상기 램프가 밀착된 상태에서 상기 도광판과 램프의 측면이 상기 몰드 프레임의 내측에 밀착되도록 끼워맞춤 삽입되는 빛효율을 향상시키기 위한 액정표시장치의 몰드 프레임 결합구조.The liquid crystal panel has different sizes of the two glass substrates, and a lower glass substrate having a smaller size among the two glass substrates is fitted into the mold frame, and the lamp is in close contact with the light guide plate. Mold frame coupling structure of the liquid crystal display device for improving the light efficiency that is inserted into the side of the lamp to be in close contact with the inside of the mold frame. 제 1 항에 있어서,The method of claim 1, 상기 두 글라스기판에 접속된 TAB은 상기 몰드 프레임의 외측으로 배치되는 것을 특징으로 하는 빛효율을 향상시키기 위한 액정표시장치의 몰드 프레임 결합구조.And a TAB connected to the two glass substrates is disposed outside of the mold frame.
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