KR20000018704A - Liquid crystal display - Google Patents
Liquid crystal display Download PDFInfo
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- KR20000018704A KR20000018704A KR1019980036431A KR19980036431A KR20000018704A KR 20000018704 A KR20000018704 A KR 20000018704A KR 1019980036431 A KR1019980036431 A KR 1019980036431A KR 19980036431 A KR19980036431 A KR 19980036431A KR 20000018704 A KR20000018704 A KR 20000018704A
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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
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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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
- 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
- G02F1/13332—Front frames
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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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133334—Electromagnetic shields
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
본 발명은 액정표시장치에 관한 것으로, 더욱 상세하게는 인쇄회로기판과 접촉되는 몰드프레임의 후면에서부터 각 몰드프레임 마운팅부의 상부면까지 연장되도록 접지용 도전성막을 몰드프레임과 일체로 형성하여 불요 주파수(noise) 성분을 제거한 액정표시장치에 관한 것이다.The present invention relates to a liquid crystal display device, and more particularly, a grounding conductive film is integrally formed with a mold frame so as to extend from a rear surface of a mold frame in contact with a printed circuit board to an upper surface of each mold frame mounting portion. The liquid crystal display device which removed the component).
일반적으로 널리 사용되고 있는 표시장치들 중의 하나인 CRT(Cathode Ray Tube)는 TV를 비롯해서 계측기기, 정보 단말기기 등의 모니터에 주로 이용되고 있으나, CRT 자체의 무게나 크기로 인해 전자 제품의 소형화, 경량화의 요구에 적극 대응할 수 없었다.CRT (Cathode Ray Tube), one of the widely used display devices, is mainly used for monitors such as TVs, measuring devices, information terminal devices, etc., but the size and weight of electronic products are reduced due to the weight and size of the CRT itself. Could not respond actively to the demands of.
이러한, CRT를 대체하기 위해 소형, 경량화의 장점을 갖고 있는 액정표시장치가 활발하게 개발되어 왔고, 최근에는 평판 표시장치로서의 역할을 충분히 수행할 수 있을 정도로 개발되어 액정표시장치의 수요는 계속 증가되고 있다. 또한, 액정표시장치의 화면유효면적은 가능한 확대시키면서 액정표시장치를 박형화하기 위해 액정표시장치의 구동용 반도체 칩의 실장에 새로운 기술이 적극적으로 도입되고 있다.In order to replace the CRT, the liquid crystal display device having the advantages of small size and light weight has been actively developed, and recently, the liquid crystal display device has been developed enough to perform a role as a flat panel display device. have. In addition, new technologies have been actively introduced in mounting semiconductor chips for driving the liquid crystal display device in order to reduce the screen effective area of the liquid crystal display device and to make the liquid crystal display device thinner.
그러나, 인쇄회로기판(Printed Circuit Board; 이하 PCB라 한다.)에 실장된 구동용 반도체 칩들은 대부분 고주파 신호에 의해 구동되기 때문에 구동용 반도체 칩들로부터 불요 주파수가 발생된다. 이러한, 불요 주파수는 LCD 패널로 전송되는 전기적 신호와 간접을 일으켜 액정표시장치의 화질을 저하시키고 기기의 오동작을 유발시키는 한편 전자파(EMI;Electro Magnetic interference)를 발생시키는 소스 역할을 한다.However, since driving semiconductor chips mounted on a printed circuit board (hereinafter, referred to as a PCB) are mostly driven by a high frequency signal, an unnecessary frequency is generated from the driving semiconductor chips. The unnecessary frequency causes indirect electrical signals transmitted to the LCD panel, thereby degrading the image quality of the liquid crystal display, causing malfunction of the device, and acting as a source for generating electromagnetic waves (EMI).
여기서, 전자파는 불필요한 전자기신호 또는 전자기 잡음을 의미하는 것으로, 디지털 기술과 반도체 기술등의 발달로 정밀전자기기에 반도체 칩이 광범위하게 이용되면서 반도체 칩들로부터 발생되는 전자파는 전파 잡음간섭을 비롯해 정밀전자기기의 오동작을 유발시키고 인체등 생체에 큰 영향을 미치고 있다.Here, electromagnetic waves mean unnecessary electromagnetic signals or electromagnetic noises. As semiconductor chips are widely used in precision electronic devices due to the development of digital technology and semiconductor technology, electromagnetic waves generated from semiconductor chips are used for precision electronic devices including interference of radio noise. It causes the malfunction of the human body and has a great impact.
이와 같은 불요 주파수를 제거하기 위해 액정표시장치(1)에서는 도 1에 도시된 바와 같이 몰드프레임(10)의 후면에 설치된 PCB(20)와 금속재질의 탑샤시(30) 사이에 접지용 클립(50)을 설치하여 불요 주파수의 접지경로를 제공한다.In order to remove such an unnecessary frequency, the liquid crystal display device 1 includes a grounding clip between the PCB 20 installed on the rear surface of the mold frame 10 and the metal top chassis 30 as shown in FIG. 1. 50) are provided to provide grounding paths for unwanted frequencies.
여기서, 몰드프레임(10)은 램프 어셈블리, 반사판, 도광판, 광학시트류, LCD 패널등을 수납하여 고정하는 것으로, 길이방향의 양측면에 액정표시장치(1)를 다른 설비, 예컨대 랩탑형 컴퓨터의 모니터 케이스에 고정시키기 위한 몰드프레임 마운팅부(12)가 형성된다.Here, the mold frame 10 accommodates and fixes a lamp assembly, a reflector, a light guide plate, optical sheets, and an LCD panel. The liquid crystal display device 1 is mounted on both sides of the longitudinal direction, for example, a monitor of a laptop computer. The mold frame mounting part 12 is fixed to the case.
PCB(20)는 몰드프레임(10)에 수납된 LCD 패널(도시 안됨)과 테이프 캐리어 패키지(Tape Carrier Package;이하 TCP라 한다.)(25)를 매개로 연결되어 LCD 패널을 구동시키는 것으로, TCP(25)의 절곡에 의해 몰드프레임(10)의 후면에 위치한다. 또한, 몰드프레임(10)과 접촉되는 PCB(20)의 하부면 중 접지용 클립(50)과 접촉되는 PCB(20)의 길이방향 양단부에는 솔더 레지스트(solder resist; 도시 안됨)가 제거되어 금속막(도시 안됨)이 노출되고, 금속막이 노출된 PCB(20)의 양단과 중앙부분에는 나사홀(24)이 형성되어 고정용 스크류(40, 42)가 체결된다.The PCB 20 is connected to the LCD panel (not shown) accommodated in the mold frame 10 and the tape carrier package (hereinafter referred to as TCP) 25 to drive the LCD panel. It is located in the rear of the mold frame 10 by the bending of (25). In addition, solder resists (not shown) are removed on both ends of the PCB 20 in contact with the grounding clip 50 of the lower surface of the PCB 20 in contact with the mold frame 10 to remove the metal film. (Not shown) is exposed, and screw holes 24 are formed at both ends and the central portion of the PCB 20 where the metal film is exposed, and the fixing screws 40 and 42 are fastened.
여기서, PCB의 중앙에 체결된 고정용 스크류(42)는 단순히 PCB(20)를 몰드프레임(10)에 고정시키는 역할만을 하는 반면, PCB(20)의 양단에 체결된 고정용 스크류들(40)은 PCB(20)와 접지용 클립(50)을 관통하여 몰드프레임(10)에 체결되기 때문에 불요 주파수의 접지경로를 제공한다. 미설명 부호 22는 구동소자이다.Here, the fixing screw 42 fastened to the center of the PCB merely serves to fix the PCB 20 to the mold frame 10, while the fixing screws 40 fastened to both ends of the PCB 20. Is fastened to the mold frame 10 by penetrating through the PCB 20 and the grounding clip 50 to provide a grounding path of an undesired frequency. Reference numeral 22 is a driving element.
탑샤시(30)는 몰드프레임(10)에 삽입된 각 부재들이 이탈되는 것을 방지하기 위해 몰드프레임(10)의 상부면에서 덮여지고 몰드프레임(10)과 체결되는 것으로, 몰드프레임 마운팅부(12)와 대응되는 탑샤시(30)의 측면에는 탑샤시 마운팅부(32)가 형성된다.The top chassis 30 is covered at the upper surface of the mold frame 10 and fastened to the mold frame 10 to prevent each member inserted into the mold frame 10 from being separated, and the mold frame mounting part 12 The top chassis mounting portion 32 is formed on the side of the top chassis 30 corresponding to the top chassis 30.
탑샤시(30)와 PCB(20)을 연결시켜 전자파의 접지경로를 제공하는 접지용 클립(50)의 일단은 일자로 형성되고 타단은 "ㄷ"자 형상으로 형성되어 몰드프레임(10)과 PCB(20)의 사이에 접지용 클립(50)의 일단이 삽입되고, 타단은 서로 결합된 몰드프레임 및 탑샤시 마운팅부(12, 32)에 끼워진다.One end of the grounding clip 50, which connects the top chassis 30 and the PCB 20 to provide a grounding path for electromagnetic waves, is formed in a straight line and the other end is formed in a “c” shape to form the mold frame 10 and the PCB. One end of the grounding clip 50 is inserted between the 20 and the other end is fitted to the mold frame and the top chassis mounting portions 12 and 32 coupled to each other.
한편, 앞에서 설명한 바와 같이 몰드프레임(10)에 탑샤시(30)가 체결되고 PCB(20)와 탑샤시(30) 사이에 전자파 이동경로를 제공하는 접지용 클립(50)이 설치되면 마운팅 스크류(mounting screw; 45)를 이용하여 몰드프레임 및 탑샤시 마운팅부(12, 32)를 모니터 케이스에 체결하여 랩탑형 컴퓨터에 액정표시장치(1)를 고정시킨다.Meanwhile, as described above, when the top chassis 30 is fastened to the mold frame 10 and a grounding clip 50 is provided between the PCB 20 and the top chassis 30 to provide the electromagnetic wave moving path, a mounting screw ( Fixing the liquid crystal display device (1) to the laptop computer by fastening the mold frame and the top chassis mounting parts (12, 32) to the monitor case using a mounting screw (45).
이와 같이 PCB(20)와 탑샤시(30) 사이에 접지용 클립(50)이 연결된 액정표시장치(1)를 랩탑형 컴퓨터에 연결하면, PCB(20)에서 발생된 불요 주파수가 접지용 클립(50)을 따라 탑샤시 마운팅부(32)로 전달되고 탑샤시 마운팅부(32)로 전달된 불요 주파수는 랩탑형 컴퓨터에 형성된 접지단자를 통해 접지된다.As such, when the liquid crystal display device 1 having the grounding clip 50 connected between the PCB 20 and the top chassis 30 is connected to the laptop computer, the unnecessary frequency generated from the PCB 20 is connected to the grounding clip ( The unwanted frequency delivered to the top chassis mounting portion 32 and to the top chassis mounting portion 32 along 50 is grounded through a ground terminal formed in a laptop computer.
그러나, 앞에서 설명한 바와 같이 PCB에서 발생된 불요 주파수를 접지시키기 위해서 PCB과 탑샤시 사이에 접지용 클립을 끼울 경우 접지용 클립의 체결로 인한 조립공정의 수가 증가되어 제품의 수율 및 생산성이 저하된다.However, as described above, when the grounding clip is inserted between the PCB and the top chassis in order to ground the unwanted frequency generated from the PCB, the number of assembly processes due to the fastening of the grounding clip is increased, thereby lowering the yield and productivity of the product.
또한, 접지용 클립이 PCB과 탑샤시 마운팅부에 정확히 체결되지 않을 경우 불요 주파수와 LCD 패널에 인가되는 전기적 신호가 간접을 일으켜 오동작을 발생시키고 또한, 접지되지 않은 불요 주파수로 인해 전자파가 발생되어 제품의 신뢰성이 저하된다.In addition, when the grounding clip is not correctly connected to the PCB and the top chassis mounting part, an unnecessary frequency and an electrical signal applied to the LCD panel cause an indirect malfunction, and an electromagnetic wave is generated due to the ungrounded unnecessary frequency. The reliability of is lowered.
또한 PCB과 접지용 클립의 접촉면적이 적기 때문에 PCB에서 발생된 불요 주파수가 완전히 접지되지 않아 불요 주파수가 LCD 패널에 인가되는 전기적 신호가 간접을 일으켜 오동작을 발생시키고 접지되지 않은 불요 주파수로 인해 전자파가 발생되어 제품의 신뢰성이 저하된다.Also, due to the small contact area between the PCB and the grounding clip, the unwanted frequency generated from the PCB is not completely grounded, causing the electrical signal to be applied to the LCD panel to indirectly cause malfunctions. To reduce the reliability of the product.
따라서, 본 발명의 목적은 상기와 같은 문제점을 감안하여 안출된 것으로써, 불요 주파수의 접지경로를 제공하는 접지용 도전성막을 몰드프레임과 일체로 형성하여 제품의 수율 및 생산성을 향상시키는데 있다.Accordingly, an object of the present invention is to conceive in view of the above problems, and to improve the yield and productivity of the product by forming a grounding conductive film integrally with the mold frame to provide a grounding path of the unwanted frequency.
본 발명의 다른 목적은 PCB와 접지용 도전성막의 접촉면적을 증대시켜 제품의 신뢰성을 향상시키는데 있다.Another object of the present invention is to increase the contact area of the PCB and the conductive film for grounding to improve the reliability of the product.
본 발명의 다른 목적은 다음의 상세한 설명과 첨부된 도면으로부터 보다 명확해 질 것이다.Other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.
도 1은 종래의 액정표시장치의 배면을 도시한 분해 사시도이다.1 is an exploded perspective view illustrating a rear surface of a conventional liquid crystal display device.
도 2는 본 발명에 의한 액정표시장치의 배면을 도시한 분해 사시도이고,2 is an exploded perspective view showing the back of the liquid crystal display according to the present invention;
도 3은 본 발명에 의한 인쇄회로기판의 배면 구조를 나타낸 사시도이며,3 is a perspective view showing a back structure of a printed circuit board according to the present invention;
도 4는 도 2를 I-I선을 따라 절단한 종단면도이다.4 is a longitudinal cross-sectional view taken along the line II of FIG. 2.
이와 같은 목적을 달성하기 위해서 본 발명은 PCB이 접촉되는 몰드프레임의 후면 소정영역에서부터 몰드프레임의 측면에 형성된 각 몰드프레임 마운팅부의 상부면까지 접지용 도전성막을 형성하는데, 접지용 도전성막은 몰드프레임과 일체로 형성된다.In order to achieve the above object, the present invention forms a conductive film for grounding from a predetermined region of the rear surface of the mold frame to which the PCB is in contact with the upper surface of each mold frame mounting portion formed on the side of the mold frame. It is formed integrally.
일예로, 접지용 도전성막은 몰드프레임을 사출하는 프레스에 금속시트를 부착하여 몰드프레임과 함께 접지용 도전성막을 사출하는 메탈 인터커넥트 몰딩(metal interconnect molding)방식으로 형성된다.For example, the grounding conductive film is formed by a metal interconnect molding method in which a metal sheet is attached to a press for ejecting a mold frame to eject a grounding conductive film together with the mold frame.
이하, 본 발명에 의한 액정표시장치의 구조를 첨부된 도면 도 2 내지 도 4를 참조하여 설명하면 다음과 같다.Hereinafter, the structure of the liquid crystal display according to the present invention will be described with reference to FIGS. 2 to 4.
액정표시장치(100)는 도 4에 도시된 바와 같이 상부면에 수납공간이 형성된 절연성 재질의 몰드프레임(110)과, 몰드프레임(110)의 기저면에서부터 차례대로 수납되어 램프 어셈블리(도시 안됨)에서 발산된 빛을 안내하고 집광하는 반사판(210), 도광판(220), 광학 시트류(230)와, 광학 시트류(230)의 상부에 설치되어 정보를 디스플레이하는 LCD 패널(240)과, LCD 패널(240)과 전기적으로 연결되어 LCD 패널(240)을 구동시키는 PCB(120)와, PCB(120)가 접촉되는 몰드프레임(110)의 후면에 몰드프레임(110)과 일체로 형성되어 PCB(120)에서 발생된 불요 주파수의 접지경로를 제공하는 접지용 도전성막(160)과, 몰드프레임(110)과 체결되어 LCD 패널(240)이 몰드프레임(110)에서 이탈되는 것을 방지하는 탑샤시(130)로 구성된다.As shown in FIG. 4, the liquid crystal display 100 may be sequentially received from an insulating mold frame 110 having an insulating space formed on an upper surface thereof, and a base surface of the mold frame 110, and then may be stored in a lamp assembly (not shown). Reflecting plate 210 for guiding and condensing the emitted light, light guide plate 220, optical sheet 230, LCD panel 240 installed on the optical sheet 230 to display information, and LCD panel The PCB 120 is electrically connected to the 240 to drive the LCD panel 240, and the PCB 120 is integrally formed with the mold frame 110 on the rear surface of the mold frame 110 to which the PCB 120 is in contact. Ground conductive film 160 to provide the ground path of the unwanted frequency generated in the) and the top chassis 130 is fastened to the mold frame 110 to prevent the LCD panel 240 from being separated from the mold frame 110 It is composed of
도 2에 도시된 바와 같이 몰드프레임(110)의 외측면에는 액정표시장치(100)를 다른 설비의 케이스, 예를 들어 랩탑형 컴퓨터(도시 안됨)의 모니터 케이스(도시 안됨)에 고정시키기 위한 복수개의 몰드프레임 마운팅부(112, 112a)가 형성된다. 몰드프레임 마운팅부(112, 112a)는 서로 대향하는 몰드프레임(110)의 단변방향 양단에 각각 하나씩 형성되고, 각 몰드프레임 마운팅부(112, 112a)의 중앙에는 나사홀(114)이 형성되어 액정표시장치(100)를 모니터 케이스에 고정시키는 마운팅 스크류(145)가 체결된다.As shown in FIG. 2, the outer surface of the mold frame 110 includes a plurality of liquid crystal display devices 100 for fixing to a case of another device, for example, a monitor case (not shown) of a laptop computer (not shown). Mold frame mounting portions 112 and 112a are formed. The mold frame mounting parts 112 and 112a are formed at both ends of the short side direction of the mold frame 110 facing each other, and screw holes 114 are formed in the center of each mold frame mounting part 112 and 112a to form a liquid crystal. The mounting screw 145 fixing the display device 100 to the monitor case is fastened.
PCB(120)는 금속패턴이 형성된 경질의 판재를 다층으로 적층시킨 후 회로패턴 및 비아홀을 보호하기 위해 PCB(120)의 상부면과 하부면에 솔더 레지스트(126)를 도포한 것으로, 몰드프레임(110)과 접촉되지 않는 PCB(120)의 상부면에는 도 2에 도시된 바와 같이 구동소자들(122)이 실장된다.The PCB 120 is formed by stacking a hard plate having a metal pattern in a multi-layer, and then applying a solder resist 126 to the upper and lower surfaces of the PCB 120 to protect circuit patterns and via holes. The driving elements 122 are mounted on the upper surface of the PCB 120 which is not in contact with 110 as shown in FIG. 2.
본 발명에 따르면, 도 3에 도시된 바와 같이 몰드프레임(110)의 후면과 접촉되는 PCB(120)의 하부면 중 전기적 신호가 전달되는 신호배선 및 비아홀이 형성되지 않은 PCB(120)의 가장자리를 따라 금속막(128)이 솔더 레지시트(126)의 외부로 노출되어 접지용 도전성막(160)과 PCB(120)의 접지면적을 증대시킨다.According to the present invention, as shown in Figure 3 of the lower surface of the PCB 120 in contact with the back of the mold frame 110 to the edge of the PCB 120, the signal wiring and the via hole is not formed, the electrical signal is transmitted Accordingly, the metal film 128 is exposed to the outside of the solder resist sheet 126 to increase the ground area of the ground conductive film 160 and the PCB 120.
이와 같이 형성된 PCB는 LCD 패널(240)의 장변방향 일측과 단변방향 일측에 TCP(125)에 의해 연결되는데, 여기서는 LCD 패널(240)의 장변방향에 위치한 PCB(120)만을 도시하였으므로, 이하 LCD 패널(240)의 장변방향에 연결된 PCB(120)에 대해서만 설명하기로 한다.The PCB formed as described above is connected to one side of the LCD panel 240 by one side in a long side direction and one side of the LCD side by way of a TCP 125. Here, only the PCB 120 located in the long side direction of the LCD panel 240 is illustrated. Only the PCB 120 connected to the long side direction of 240 will be described.
LCD 패널(240)의 장변방향에 연결된 PCB(120)는 TCP (125)의 절곡에 의해 몰드프레임(110)의 후면에 위치하는데, PCB(120)의 길이방향 양단과 중앙부분에 나사홀(124)이 형성되어 PCB(120)는 고정용 스크류들(140)에 의해 몰드프레임(110)에 고정된다. 여기서, 고정용 스크류들(140)은 PCB(120)를 몰드프레임(110)에 고정시킬 뿐만 아니라 접지용 도전성막(160)과 접촉되기 때문에 PCB(120)에서 발생된 불요 주파수를 접지시킨다.The PCB 120 connected to the long side of the LCD panel 240 is located at the rear of the mold frame 110 by bending the TCP 125. The screw holes 124 are disposed at both ends and the center of the PCB 120 in the longitudinal direction. ) Is formed and the PCB 120 is fixed to the mold frame 110 by fixing screws 140. Here, the fixing screws 140 not only fix the PCB 120 to the mold frame 110 but also contact the grounding conductive film 160 to ground the unnecessary frequency generated from the PCB 120.
한편, PCB(120)에서 발생된 불요 주파수의 접지경로를 제공하는 접지용 도전성막(160)은 도 2 및 도 4에 도시된 바와 같이 몰드프레임(110)의 후면 중 PCB(120)와 접촉되는 부분에서부터 각 몰드프레임 마운팅부(112, 112a)의 상부면까지 연장되어 형성된다.On the other hand, the grounding conductive film 160 that provides the ground path of the unwanted frequency generated in the PCB 120 is in contact with the PCB 120 of the back of the mold frame 110, as shown in FIG. It is formed extending from the portion to the upper surface of each mold frame mounting portion (112, 112a).
바람직하게, 도전성막(120) 중 PCB(120)와 대응되는 영역에 형성되는 접지용 도전성막(162)은 PCB(120)와의 접지면적을 증대시키기 위해 PCB(120)가 접촉되는 부분 전체에 형성된다.Preferably, the grounding conductive film 162 formed in an area corresponding to the PCB 120 of the conductive film 120 is formed over the entire portion of the PCB 120 contacted to increase the ground area with the PCB 120. do.
또한, PCB(120)와 인접한 몰드프레임 마운팅부(112a)에 형성되는 접지용 도전성막(164)은 PCB(120)와 대응되는 접지용 도전성막(162)의 길이방향 양단부에서부터 몰드프레임 마운팅부(112a)와 대응되는 몰드프레임(110)의 측면과 몰드프레임 마운팅부(112a)의 하부면 및 측면을 따라 몰드프레임 마운팅부(112a)의 상부면까지 연장되어 형성된다.In addition, the ground conductive film 164 formed on the mold frame mounting portion 112a adjacent to the PCB 120 may be formed from both ends of the longitudinal length of the ground conductive film 162 corresponding to the PCB 120. The side surface of the mold frame 110 corresponding to 112a and the lower surface and the side surface of the mold frame mounting portion 112a extend to the upper surface of the mold frame mounting portion 112a.
또한, PCB(120)의 먼쪽에 위치한 몰드프레임 마운팅부(112)에 형성되는 접지용 도전성막(166)은 PCB(120)와 대응되는 접지용 도전성막(162)의 장변방향 양단부에서부터 몰드프레임(110)의 단변방향 가장자리, 몰드프레임 마운팅부(112)와 대응되는 몰드프레임(110)의 측면, 몰드프레임 마운팅부(112)의 하부면 및 측면을 따라 몰드프레임 마운팅부(112)의 상부면까지 연장되어 형성된다.In addition, the grounding conductive film 166 formed on the mold frame mounting part 112 located at the far side of the PCB 120 may be formed from both ends of the long side direction of the grounding conductive film 162 corresponding to the PCB 120. Short side edges of the 110, the side of the mold frame 110 corresponding to the mold frame mounting portion 112, the lower surface and the lower surface of the mold frame mounting portion 112 to the upper surface of the mold frame mounting portion 112 It is formed to extend.
바람직하게, 접지용 도전성막(160)은 몰드프레임(110)을 사출하는 프레임(도시 안됨) 중 PCB(120)가 위치할 부분과 몰드프레임 마운팅부들(112, 112a)이 형성될 부분에 금속시트를 부착한 후 몰드프레임(110)을 사출하는 메탈 인터커넥트 몰딩(metal interconnect molding)방식에 의해 몰드프레임(110)과 일체로 형성된다. 이때, 몰드프레임(110)의 재질인 플라스틱의 점성으로 인해 프레임에 부착되어 있던 금속시트가 몰드프레임(110)의 원하는 부분에 견고하게 융착되어 하나의 재질처럼 굳어진다.Preferably, the grounding conductive layer 160 may include a metal sheet in a portion of the frame (not shown) in which the mold frame 110 is injected, in which the PCB 120 is to be located and in which the mold frame mounting portions 112 and 112a are to be formed. After the attachment of the mold frame 110 is formed integrally with the mold frame 110 by a metal interconnect molding (metal interconnect molding) method. At this time, due to the viscosity of the plastic material of the mold frame 110, the metal sheet attached to the frame is firmly fused to the desired portion of the mold frame 110 is hardened as one material.
바람직하게, 접지용 도전성막(160)을 형성하는 금속시트는 도전성 및 성형성이 좋은 구리를 이용한다.Preferably, the metal sheet forming the conductive film 160 for grounding uses copper having good conductivity and moldability.
탑샤시(130)는 금속재질로 형성되어 LCD 패널(240)의 가장자리 소정영역과 몰드프레임(110)의 외측면을 감싸도록 몰드프레임(110)에 체결되는 것으로, 몰드프레임 마운팅부(112, 112a)와 대응되는 측면에 탑샤시 마운팅부(132)가 형성된다. 따라서, 몰드프레임(110)과 탑샤시(130)가 체결되면 몰드프레임 마운팅부(112, 112a)에 형성된 접지용 도전성막(164, 166)이 탑샤시 마운팅부(132)에 접촉되어 PCB(120)에서 방출된 불요 주파수의 접지경로를 제공한다.The top chassis 130 is formed of a metal material and is fastened to the mold frame 110 so as to surround a predetermined area of the edge of the LCD panel 240 and the outer surface of the mold frame 110, and the mold frame mounting parts 112 and 112a. Top chassis mounting portion 132 is formed on the side corresponding to. Therefore, when the mold frame 110 and the top chassis 130 are fastened, the conductive conductive layers 164 and 166 formed on the mold frame mounting parts 112 and 112a are in contact with the top chassis mounting part 132 and the PCB 120. Provide a ground path for the unwanted frequencies emitted by.
한편, 앞에서 설명한 구조를 갖는 액정표시장치(100)는 보통 랩탑형 컴퓨터에 설치되어 모니터로 사용되는데, 액정표시장치(100)의 몰드프레임 및 탑샤시 마운팅부(112, 112a, 132)에 마운팅 스크류(145)가 체결되어 모니터 케이스와 결합된다.Meanwhile, the liquid crystal display device 100 having the above-described structure is usually installed in a laptop computer and used as a monitor. The mounting screw is mounted on the mold frame and the top chassis mounting parts 112, 112a, and 132 of the liquid crystal display device 100. 145 is fastened and coupled to the monitor case.
이와 같이 구성된 액정표시장치에서 전자파가 접지되는 과정에 대해 설명하면 다음과 같다.A process of grounding electromagnetic waves in the liquid crystal display device configured as described above is as follows.
액정표시장치(100)를 구동시키기 위해 PCB(120)에 고주파 신호가 인가되면 구동소자가 밀집된 PCB(120)에서 많은 양의 불요 주파수가 발생되는데, PCB(120)에서 발생된 불요 주파수는 솔더 레지스트(126)의 외부로 노출된 금속막(128)과 고정용 스크류들(140)에 의해 PCB(120)과 대응되도록 형성된 접지용 도전성막(162) 쪽으로 이동된다.When a high frequency signal is applied to the PCB 120 to drive the liquid crystal display 100, a large amount of unnecessary frequency is generated in the PCB 120 where the driving elements are concentrated. The unnecessary frequency generated in the PCB 120 is a solder resist. The metal film 128 and the fixing screws 140 exposed to the outside of the 126 are moved toward the ground conductive film 162 formed to correspond to the PCB 120.
이와 같이 접지용 도전성막(162) 쪽으로 이동된 불요 주파수는 PCB(120)와 대응되는 접지용 도전성막(162)으로부터 각 몰드프레임 마운팅부(112a, 112)의 상부면까지 연장된 접지용 도전성막(164, 166)을 따라 몰드프레임(110)에 결합된 탑샤시 마운팅부(132) 쪽으로 이동된다.The undesired frequency shifted toward the ground conductive film 162 extends from the ground conductive film 162 corresponding to the PCB 120 to the upper surfaces of the mold frame mounting parts 112a and 112. It is moved toward the top chassis mounting portion 132 coupled to the mold frame 110 along the (164, 166).
몰드프레임 마운팅부(112, 112a)와 탑샤시 마운팅부(132)의 접촉으로 인해 탑샤시(130) 쪽으로 이동된 불요 주파수는 탑샤시(130)와 마운팅 스크류(145)를 통해 액정표시장치(100)가 설치된 랩탑형 컴퓨터의 접지단자로 이동되어 완전히 접지된다.The unwanted frequency shifted toward the top chassis 130 due to the contact between the mold frame mounting units 112 and 112a and the top chassis mounting unit 132 is provided through the top chassis 130 and the mounting screw 145. ) Is moved to the ground terminal of the installed laptop computer and is completely grounded.
여기서, PCB(120)의 하부면 전(全)영역이 접지용 도전성막(162)과 접촉되고, PCB(120)을 고정시키는 고정용 스크류들(140)이 접지용 도전성막(162)을 관통하여 몰드프레임(110)에 체결되기 때문에 PCB(120)와 접지용 도전성막(162)의 접지면적이 증대되었다. 또한 각각의 몰드프레임 마운팅부(112a, 112)에 접지용 도전성막(164, 166)이 형성되어 탑샤시(110)와 접지용 도전성막(164, 166)의 접지면적이 증대되었다. 따라서, PCB(120)에서 발생된 불요 주파수는 접지면적의 증가로 인해 거의 대부분 다른 설비, 즉 랩탑형 컴퓨터에 형성된 접지단자를 통해 접지된다.Here, the entire area of the lower surface of the PCB 120 is in contact with the grounding conductive film 162, and the fixing screws 140 for fixing the PCB 120 pass through the grounding conductive film 162. As a result, the ground area of the PCB 120 and the grounding conductive film 162 is increased because it is fastened to the mold frame 110. In addition, the conductive conductive layers 164 and 166 are formed on the mold frame mounting parts 112a and 112, respectively, to increase the ground area of the top chassis 110 and the conductive conductive layers 164 and 166. Thus, the unwanted frequency generated in the PCB 120 is grounded almost entirely through the ground terminal formed in other equipment, i.e., laptop computers, due to the increase in the ground area.
이상에서 설명한 바와 같이 본 발명은 PCB과 탑샤시를 연결하여 불요 주파수의 접지경로를 제공하는 접지용 도전성막을 몰드프레임과 일체로 형성함으로써, 액정표시장치의 조립공정을 단순화하여 제품의 수율 및 생산성을 향상시킬 수 있는 효과가 있다.As described above, the present invention connects the PCB and the top chassis to form a grounding conductive film integrally with the mold frame, which provides a grounding path of an undesired frequency, thereby simplifying the assembly process of the liquid crystal display device, thereby improving product yield and productivity. There is an effect that can be improved.
또한, PCB의 하부면 전체면적이 접지용 도전성막과 접촉되고 각 몰드프레임 마운팅부에도 접지용 도전성막을 형성하여 PCB과 탑샤시의 접지면적이 확대시킴으로써, 불요 주파수로 인한 액정표시장치의 오동작과 전자파의 발생을 방지하여 제품의 신뢰성을 향상시킬 수 있는 효과가 있다.In addition, the entire area of the lower surface of the PCB is in contact with the grounding conductive film, and the grounding conductive film is formed in each mold frame mounting part, thereby increasing the ground area of the PCB and the top chassis. It is possible to prevent the occurrence of the effect of improving the reliability of the product.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980036431A KR100607853B1 (en) | 1998-09-04 | 1998-09-04 | LCD Display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019980036431A KR100607853B1 (en) | 1998-09-04 | 1998-09-04 | LCD Display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000018704A true KR20000018704A (en) | 2000-04-06 |
| KR100607853B1 KR100607853B1 (en) | 2006-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019980036431A KR100607853B1 (en) | 1998-09-04 | 1998-09-04 | LCD Display |
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| KR (1) | KR100607853B1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020091414A (en) * | 2001-05-30 | 2002-12-06 | 삼성전자 주식회사 | Liquid crystal display device |
| KR100777491B1 (en) * | 2005-01-31 | 2007-11-20 | 도시바 마쯔시따 디스플레이 테크놀로지 컴퍼니, 리미티드 | Planar light source device and liquid crystal display apparatus |
| KR100909056B1 (en) * | 2003-01-27 | 2009-07-23 | 엘지디스플레이 주식회사 | Line on glass type liquid crystal display |
| KR100970264B1 (en) * | 2003-07-24 | 2010-07-16 | 삼성전자주식회사 | Receiving unit for display module, display module and display apparatus having the same |
| KR101232514B1 (en) * | 2005-10-05 | 2013-02-12 | 엘지디스플레이 주식회사 | Liquid crystal display device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60262127A (en) * | 1984-06-11 | 1985-12-25 | Hitachi Ltd | Liquid crystal display device |
| JPH0682803A (en) * | 1992-09-02 | 1994-03-25 | Hitachi Ltd | Liquid crystal display device |
| JPH09138389A (en) * | 1995-11-16 | 1997-05-27 | Hitachi Ltd | Liquid crystal display device |
| JPH09197425A (en) * | 1996-01-19 | 1997-07-31 | Hitachi Ltd | Liquid crystal display device |
| KR200149014Y1 (en) * | 1996-11-26 | 1999-06-15 | 전주범 | Pcb mounting structure on frame |
-
1998
- 1998-09-04 KR KR1019980036431A patent/KR100607853B1/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020091414A (en) * | 2001-05-30 | 2002-12-06 | 삼성전자 주식회사 | Liquid crystal display device |
| KR100909056B1 (en) * | 2003-01-27 | 2009-07-23 | 엘지디스플레이 주식회사 | Line on glass type liquid crystal display |
| KR100970264B1 (en) * | 2003-07-24 | 2010-07-16 | 삼성전자주식회사 | Receiving unit for display module, display module and display apparatus having the same |
| KR100777491B1 (en) * | 2005-01-31 | 2007-11-20 | 도시바 마쯔시따 디스플레이 테크놀로지 컴퍼니, 리미티드 | Planar light source device and liquid crystal display apparatus |
| KR101232514B1 (en) * | 2005-10-05 | 2013-02-12 | 엘지디스플레이 주식회사 | Liquid crystal display device |
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| Publication number | Publication date |
|---|---|
| KR100607853B1 (en) | 2006-10-19 |
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