KR20090063930A - Electromagnetic wave blocking member for display apparatus - Google Patents

Electromagnetic wave blocking member for display apparatus Download PDF

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KR20090063930A
KR20090063930A KR1020070131464A KR20070131464A KR20090063930A KR 20090063930 A KR20090063930 A KR 20090063930A KR 1020070131464 A KR1020070131464 A KR 1020070131464A KR 20070131464 A KR20070131464 A KR 20070131464A KR 20090063930 A KR20090063930 A KR 20090063930A
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South Korea
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film
high refractive
electromagnetic shielding
layer
shielding member
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KR1020070131464A
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Korean (ko)
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KR100921327B1 (en
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안진수
류제춘
오정홍
이재홍
김홍익
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삼성코닝정밀유리 주식회사
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/313—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being gas discharge devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20—Constructional details
    • H01J11/34—Vessels, containers or parts thereof, e.g. substrates
    • H01J11/44—Optical arrangements or shielding arrangements, e.g. filters, black matrices, light reflecting means or electromagnetic shielding means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0094—Shielding materials being light-transmitting, e.g. transparent, translucent
    • H05K9/0096—Shielding materials being light-transmitting, e.g. transparent, translucent for television displays, e.g. plasma display panel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2211/00—Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
    • H01J2211/20—Constructional details
    • H01J2211/34—Vessels, containers or parts thereof, e.g. substrates
    • H01J2211/44—Optical arrangements or shielding arrangements, e.g. filters or lenses
    • H01J2211/446—Electromagnetic shielding means; Antistatic means

Abstract

An electromagnetic interference shielding member for a display device is provided to improve electromagnetic interference shielding by forming a conductive layer in both sides of a substrate. A first conductive layer(20) and a second conductive layer(25) are formed by stacking a metal layer and a high refractive layer in both sides of a transparent substrate(10). The metal layer is positioned in the upper part of the transparent substrate. The high refractive layer is arranged in the rear of the transparent substrate. The first and second conductive layers are comprised by stacking two to five metal layers and high refractive layers. The metal layer is made of silver or alloy including the silver. A functional layer(30,35) is positioned on the first and second conductive layers.

Description

디스플레이 장치용 전자파 차폐부재{ELECTROMAGNETIC WAVE BLOCKING MEMBER FOR DISPLAY APPARATUS}Electromagnetic shielding member for display device {ELECTROMAGNETIC WAVE BLOCKING MEMBER FOR DISPLAY APPARATUS}

본 발명은 디스플레이 장치용 전자파 차폐부재에 관한 것으로서, 더욱 상세하게는 전자파 차폐력을 향상시킨 디스플레이 장치용 전자파 차폐부재에 관한 것이다. The present invention relates to an electromagnetic shielding member for a display device, and more particularly, to an electromagnetic shielding member for a display device with improved electromagnetic shielding force.

현대 사회가 고도로 정보화 되어감에 따라서 이미지 디스플레이(image display) 관련부품 및 기기가 현저하게 진보하고 보급되고 있다. 그 중에서, 화상을 표시하는 디스플레이 장치는 텔레비전 장치용, 퍼스널 컴퓨터의 모니터 장치용 등으로서 현저하게 보급되고 있으며, 또한 이러한 디스플레이의 대형화와 동시에 박형화가 진행되고 있다. As the modern society is highly informationized, image display-related parts and devices have been remarkably advanced and disseminated. Among them, display devices for displaying images are remarkably popular for television apparatuses, monitor apparatuses of personal computers, and the like, and thinning is progressing at the same time as such displays are enlarged.

일반적으로 플라즈마 디스플레이 패널(Plasma Display Panel, 이하 PDP) 장치는 기존의 디스플레이 장치를 대표하는 CRT(cathode ray tube) 에 비해 대형화 및 박형화를 동시에 만족할 수 있어 차세대 디스플레이 장치로서 각광받고 있다. 이러한 PDP 장치는 가스방전현상을 이용하여 화상을 표시하는 것으로서, 표시용량, 휘도, 명암 대비, 잔상, 시야각 등의 각종 표시능력이 우수하다. 그리고, PDP 장 치는 다른 표시장치보다 대형화가 용이하고, 박형의 발광형 표시장치로써 향후 고품질 디지털 텔레비전으로서 가장 적합한 특성을 갖추고 있는 것으로 평가되고 있어 CRT를 대체할 수 있는 디스플레이 장치로 각광받고 있다.In general, a plasma display panel (PDP) device is in the spotlight as a next-generation display device because it can satisfy both an enlargement and a thinning at the same time as a cathode ray tube (CRT) representing a conventional display device. The PDP apparatus displays an image using a gas discharge phenomenon, and is excellent in various display capabilities such as display capacity, brightness, contrast, afterimage, viewing angle, and the like. In addition, PDP devices are easier to be enlarged than other display devices, and are considered to be thin display devices having the most suitable characteristics as high quality digital televisions in the future.

PDP 장치는 전극에 인가되는 직류 또는 교류 전압에 의하여 전극 사이의 가스에서 방전이 발생하고, 여기에서 수반되는 자외선의 방사에 의하여 형광체를 여기시켜 발광하게 된다.The PDP device generates a discharge in the gas between the electrodes by a direct current or an alternating current voltage applied to the electrode, and excites the phosphor by the radiation of ultraviolet rays, which emits light.

PDP 장치는 그 구동 특성상 전자파 및 근적외선의 방출량이 많고 형광체의 표면반사가 높을 뿐 아니라 봉입가스인 헬륨(He)이나 제논(Xe)에서 방출되는 오렌지 광으로 인해 색순도가 음극선관에 미치지 못하는 단점이 있다. PDP 장치에서 발생되는 전자파 및 근적외선은 인체에 유해한 영향을 미치고 무선 전화기나 리모콘 등의 정밀기기의 오동작을 유발할 수도 있다. 이러한 PDP 장치를 사용하기 위해서는, PDP 장치로부터 방출되는 전자파와 근적외선의 방출을 소정치 이하로 억제하는 것이 요구되고 있다. Due to its driving characteristics, the PDP device has a high emission amount of electromagnetic waves and near infrared rays, high surface reflection of the phosphor, and color purity does not reach the cathode ray tube due to the orange light emitted from the encapsulated helium (He) or xenon (Xe). . Electromagnetic waves and near-infrared rays generated by PDP devices may have a harmful effect on the human body and may cause malfunctions of precision devices such as cordless phones or remote controls. In order to use such a PDP apparatus, it is required to suppress the emission of electromagnetic waves and near-infrared rays emitted from the PDP apparatus below a predetermined value.

전자파 차폐를 위해 도입되는 PDP 광학 필터는 기술적으로 크게 구리 에칭 메쉬 필터 타입과 다층 코팅 타입이 있다. 메쉬 필터는 MHz 대의 전자파 차단에 효과적이긴 하지만 근적외선을 차단하는 기능이 없으므로 별도로 근적외선 흡수재를 구비한다. PDP optical filters introduced for electromagnetic shielding are technically largely a copper etch mesh filter type and a multilayer coating type. Although the mesh filter is effective in blocking electromagnetic waves in the MHz band, it does not have a function of blocking near infrared rays and thus has a near infrared absorber.

다층 코팅 타입은 우수한 전기전도성을 가진 은(Ag)과 고굴절 산화층을 다층으로 코팅하여 전자파 차폐와 광투과율을 확보하고자 하지만, 기존 메쉬 타입에 비해 전자파 차폐력이 떨어지는 것으로 알려져 있다. 다층 코팅 타입에서 투과율을 높이기 위해 금속층의 막두께를 얇게 하면 면저항이 떨어지고 면저항을 높이기 위해 금속층을 두껍게 할 경우 투과율이 떨어지게 된다.The multilayer coating type is intended to secure electromagnetic shielding and light transmittance by coating silver (Ag) having a high electrical conductivity and a high refractive oxide layer in a multilayer, but it is known that electromagnetic shielding power is lower than that of the conventional mesh type. In the multilayer coating type, when the thickness of the metal layer is thinned to increase the transmittance, the sheet resistance decreases, and when the metal layer is thickened to increase the sheet resistance, the transmittance falls.

본 발명은 상기와 같은 문제점을 감안한 것으로서, PDP 전자파 차폐부재에 채용되는 다층 코팅형 타입 전자파 차폐부재에서 기판의 양면에 각각 도전층을 구비하는 디스플레이 장치용 전자파 차폐부재를 제공함을 목적으로 한다.The present invention has been made in view of the above problems, and an object of the present invention is to provide an electromagnetic shielding member for a display device having a conductive layer on both sides of a substrate in a multilayer coating type electromagnetic shielding member employed in a PDP electromagnetic shielding member.

본 발명이 이루고자 하는 기술적 과제들은 이상에서 언급한 기술적 과제들로 제한되지 않으며, 언급되지 않은 또 다른 기술적 과제들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다. Technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

본 발명의 일 특징에 따른 디스플레이 장치용 차폐부재는 Shielding member for a display device according to an aspect of the present invention

투명 기판;과 상기 투명 기판의 양면에 금속막과 고굴절막이 적층되어 형성되는 제1 및 제2도전층; 및 상기 제1 및 제2도전층 상에 위치하는 복수의 기능층;을 포함한다.First and second conductive layers formed by stacking a metal film and a high refractive film on both surfaces of the transparent substrate; And a plurality of functional layers positioned on the first and second conductive layers.

본 발명의 일실시예에 의한 디스플레이 장치용 전자파 차폐부재는 기판의 양면에 도전층을 형성하여 전자파 차폐력을 향상시킬 수 있다.Electromagnetic shielding member for a display device according to an embodiment of the present invention can improve the electromagnetic shielding power by forming a conductive layer on both sides of the substrate.

이하 첨부된 도면들을 참조하여 본 발명의 실시예들을 상세하게 설명하도록 한다. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일 실시예에 따른 전자파 차폐부재를 보이는 도면이다.1 is a view showing an electromagnetic shielding member according to an embodiment of the present invention.

도 1을 참조하면, 본 발명의 일 실시예에 따른 전자파 차폐부재(100)는 투명기판(10)과 투명기판(10)의 양면에 적층된 제1도전층(20)과 제2도전층(25) 및, 제1도전층(20)과 제2도전층(25)의 상면에 적층된 제1기능층(30)과 제2기능층(35)을 포함한다. 여기서, 참조부호 11은 접지부를 나타낸다.Referring to FIG. 1, the electromagnetic shielding member 100 according to an exemplary embodiment of the present invention may include a first conductive layer 20 and a second conductive layer stacked on both surfaces of the transparent substrate 10 and the transparent substrate 10. 25) and a first functional layer 30 and a second functional layer 35 stacked on the upper surfaces of the first conductive layer 20 and the second conductive layer 25. Here, reference numeral 11 denotes a ground portion.

투명기판(10)은 반 강화 유리(semi-tempered glass) 또는 폴리카보네이트(PC), 폴리에틸렌테레프탈레이트(PET) 등의 투명 고분자 수지가 사용될 수 있다. The transparent substrate 10 may be a semi-tempered glass or a transparent polymer resin such as polycarbonate (PC) or polyethylene terephthalate (PET).

제1 및 제2도전층(20, 25)은 금속막과 고굴절막이 중첩하여 형성될 수 있다. 상기 금속막, 고굴적막과 금속 산화막은 둘 내지 다섯 개가 중첩하여 형성될 수 있다.The first and second conductive layers 20 and 25 may be formed by overlapping a metal film and a high refractive film. The metal film, the high refractive film and the metal oxide film may be formed by overlapping two to five.

도 2는 도 1의 제1도전층(20)의 구조를, 도 3은 도 1의 제2도전층(30)의 구조를 개략적으로 나타낸 단면도이다.2 is a cross-sectional view schematically illustrating the structure of the first conductive layer 20 of FIG. 1 and FIG. 3 is a schematic view of the structure of the second conductive layer 30 of FIG. 1.

도 2를 참조하면 제1도전층(20)은 기판(10) 상면에 제1금속막(21), 제1고굴절막(22) 및, 제2금속막(23)이 차례로 적층되어 있다. 제1금속막(21) 상면에 제1고굴절막(22) 및 제2금속막(23)이 이층으로 코팅되어 있으나 기판 상면에 코팅될 수 있는 다중막은 최대 오층까지 코팅될 수 있다. Referring to FIG. 2, in the first conductive layer 20, a first metal film 21, a first high refractive film 22, and a second metal film 23 are sequentially stacked on an upper surface of the substrate 10. Although the first high refractive index layer 22 and the second metal layer 23 are coated with two layers on the upper surface of the first metal layer 21, the multilayer which may be coated on the upper surface of the substrate may be coated up to five layers.

도 3을 참조하면, 제2도전층(25)은 투명 기판(10) 배면에 제2고굴절막(26), 제3금속막(27), 제3고굴절막(26)이 차례로 코팅되어 있다. 전자파 차폐 부재의 제1 및 제2도전층(20, 25)이 이러한 구조를 가지는 경우 제1 및 제2도전층(20, 25)은 총 여섯층의 구조를 가지게 된다. Referring to FIG. 3, a second high refractive index film 26, a third metal film 27, and a third high refractive film 26 are sequentially coated on the rear surface of the second conductive layer 25. When the first and second conductive layers 20 and 25 of the electromagnetic shielding member have such a structure, the first and second conductive layers 20 and 25 have a structure of six layers in total.

제1도전층(20)은 투명 기판(10) 상에 금속막 또는 고굴절막이 두 층 내지 네 층 적층되고 최상면은 고굴절막이 적층되도록 한다. 제2도전층(25)은 투명 기판(10) 배면에 고굴절막이 코팅되고 상기 고굴절막의 상면에 금속막 또는 고굴절막이 두 층 내지 네 층 적층되도록 한다. 이 경우 전체로는 총 네층 내지 열층이 적층되게 된다.The first conductive layer 20 allows two to four layers of metal or high refractive films to be stacked on the transparent substrate 10, and a high refractive film to be stacked on the top surface thereof. The second conductive layer 25 is coated with a high refractive index film on the rear surface of the transparent substrate 10 and a metal film or a high refractive film is laminated on the upper surface of the high refractive film 10 to four layers. In this case, a total of four to ten layers are laminated as a whole.

여기서, 상기 금속막 및 상기 고굴절막은 각각 수 nm 내지 수십 nm의 두께를 가지도록 형성한다.Here, the metal film and the high refractive film is formed to have a thickness of several nm to several tens nm, respectively.

제1 내지 제3금속막(21, 23, 27)은 은 또는 은 산화물로 형성되며, 접지부(11)와의 통전을 도와 자유 전자의 흐름을 원활히 함으로써 광학 필터(100)의 전자파 차폐력을 향상시킬 수 있다. The first to third metal films 21, 23, and 27 are formed of silver or silver oxide, and help to conduct electricity with the ground portion 11 to smooth the flow of free electrons, thereby improving the electromagnetic shielding force of the optical filter 100. You can.

제1 내지 제3고굴절막(22, 26, 28)은 오산화니오븀(Nb2O5)으로 형성할 수 있다.The first to third high refractive films 22, 26, and 28 may be formed of niobium pentoxide (Nb 2 O 5 ).

접지부(11)는 은 페이스트를 사용하여 형성한다. 접지부(11)는 전기적으로 접지되어 광학 필터(100)에서 발생하는 전기를 외부로 방출한다. 접지부(11)와 투명 기판(10) 사이에는 블랙 세라믹(미도시)가 마련되어 디스플레이 장치의 화면에 표시되는 영상의 테두리 영역이 표시될 수 있다.The ground portion 11 is formed using silver paste. The ground portion 11 is electrically grounded to discharge electricity generated from the optical filter 100 to the outside. A black ceramic (not shown) may be provided between the ground portion 11 and the transparent substrate 10 to display an edge area of an image displayed on the screen of the display device.

제1기능성 필름(30)은 보호용 필름으로서 제1도전층(20)의 산화 및 불순물 부착 등을 방지하기 위하여 도전층(20)에 감압 접착제(PSA)에 의하여 접합된다.As the protective film, the first functional film 30 is bonded to the conductive layer 20 by a pressure-sensitive adhesive PSA to prevent oxidation of the first conductive layer 20 and adhesion of impurities.

제2기능성 필름(35)은 투명 기판(10)의 배면에 마련되며, 컬러 필름, 반사 방지 필름을 포함한다. 반사 방지 필름은 시청자 측에 가깝게 위치하여 외부광의 반사를 방지하여 디스플레이 장치의 표시 품질의 저하를 방지한다.The second functional film 35 is provided on the rear surface of the transparent substrate 10 and includes a color film and an antireflection film. The anti-reflection film is located close to the viewer side to prevent reflection of external light to prevent deterioration of display quality of the display device.

본 발명의 일 실시예에 따른 전자파 차폐부재는 기판의 양면에 도전층을 구비하여 전자파 차폐력을 바람직하게는 60dB이상 향상시킬 수 있다.Electromagnetic shielding member according to an embodiment of the present invention can be provided with a conductive layer on both sides of the substrate to improve the electromagnetic shielding force preferably 60dB or more.

이상과 같이 본 발명은 비록 한정된 실시예와 도면에 의해 설명되었으나, 본 발명은 상기의 실시예에 한정되는 것은 아니며, 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 이러한 기재로부터 다양한 수정 및 변형이 가능하다. 그러므로, 본 발명의 범위는 설명된 실시예에 국한되어 정해져서는 아니 되며, 후술하는 특허청구범위뿐 아니라 이 특허청구범위와 균등한 것들에 의해 정해져야 한다.As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

도 1은 본 발명의 일 실시예에 따른 전자파 차폐부재를 개략적으로 보이는 도면.1 is a view schematically showing an electromagnetic shielding member according to an embodiment of the present invention.

도 2는 본 발명의 일 실시예에 따른 전자파 차폐부재의 제1도전층의 구조를 개략적으로 보이는 단면도,2 is a cross-sectional view schematically showing the structure of the first conductive layer of the electromagnetic shielding member according to an embodiment of the present invention;

도 3은 본 발명의 일 실시예에 따른 전자파 차폐부재의 제2도전층의 구조를 개략적으로 보이는 단면도.3 is a cross-sectional view schematically showing the structure of the second conductive layer of the electromagnetic shielding member according to an embodiment of the present invention.

[도면의 주요 부호에 대한 설명][Description of Major Symbols in Drawing]

10: 투명 기판 11: 접지부10: transparent substrate 11: ground portion

20: 제1도전층 30: 제1기능층20: first conductive layer 30: first functional layer

25: 제2도전층 35: 제2기능층25: second conductive layer 35: second functional layer

Claims (5)

투명 기판;Transparent substrates; 상기 투명 기판의 양면에 금속막과 고굴절막이 적층되어 형성되는 제1 및 제2도전층; 및First and second conductive layers formed by stacking a metal film and a high refractive film on both surfaces of the transparent substrate; And 상기 제1 및 제2도전층 상에 위치하는 복수의 기능층; A plurality of functional layers positioned on the first and second conductive layers; 을 포함하는 것을 특징으로 하는 디스플레이 장치용 전자파 차폐부재.Electromagnetic shielding member for a display device comprising a. 제1항에 있어서, The method of claim 1, 상기 금속막은 은 또는 은을 함유한 합금으로 형성되는 것을 특징으로 하는 디스플레이 장치용 전자파 차폐부재.And said metal film is formed of silver or an alloy containing silver. 제1항에 있어서, The method of claim 1, 상기 제1도전층은 상기 투명 기판의 상면에 금속막이 위치하고, 상기 금속막과 상기 고굴절막이 두 개 내지 다섯 개 적층되는 것을 특징으로 하는 디스플레이 장치용 전자파 차폐부재.Wherein the first conductive layer is a metal film is located on the upper surface of the transparent substrate, the electromagnetic shielding member for a display device, characterized in that two to five of the metal film and the high refractive film is laminated. 제1항에 있어서, The method of claim 1, 상기 제2도전층은 상기 투명 기판의 배면에 고굴절막이 배치되고, 상기 금속막과 상기 고굴절막이 두 개 내지 다섯 개 적층되는 것을 특징으로 하는 디스플 레이 장치용 전자파 차폐부재.The second conductive layer is a high refractive index film is disposed on the back surface of the transparent substrate, the metal shielding film and the high refractive index film, the electromagnetic shielding member for the display device, characterized in that two to five. 제3항에 있어서, The method of claim 3, 상기 기능층은 컬러 필름, 반사방지 필름, 보호용 필름을 포함하는 것을 특징으로 하는 디스플레이 장치용 전자파 차폐부재.The functional layer is an electromagnetic shielding member for a display device comprising a color film, an antireflection film, a protective film.
KR1020070131464A 2007-12-14 2007-12-14 Electromagnetic wave blocking member for display apparatus KR100921327B1 (en)

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