KR20080037983A - Thermal spread shield sheet and liquid crystal display device having thereof - Google Patents

Thermal spread shield sheet and liquid crystal display device having thereof Download PDF

Info

Publication number
KR20080037983A
KR20080037983A KR1020060105342A KR20060105342A KR20080037983A KR 20080037983 A KR20080037983 A KR 20080037983A KR 1020060105342 A KR1020060105342 A KR 1020060105342A KR 20060105342 A KR20060105342 A KR 20060105342A KR 20080037983 A KR20080037983 A KR 20080037983A
Authority
KR
South Korea
Prior art keywords
adhesive layer
heat dissipation
base film
liquid crystal
dissipation sheet
Prior art date
Application number
KR1020060105342A
Other languages
Korean (ko)
Inventor
곽영재
Original Assignee
엘지디스플레이 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지디스플레이 주식회사 filed Critical 엘지디스플레이 주식회사
Priority to KR1020060105342A priority Critical patent/KR20080037983A/en
Publication of KR20080037983A publication Critical patent/KR20080037983A/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
    • B32B9/007—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile comprising carbon, e.g. graphite, composite carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/045—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • 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
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133604—Direct backlight with lamps
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/133628—Illuminating devices with cooling means
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/22—Antistatic materials or arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Ceramic Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)

Abstract

A heat radiating sheet and an LCD(Liquid Crystal Display) device having the same are provided to reduce faults by reducing generation of bubbles of the heat radiating sheet according as a protection film layer is formed by using a thermosetting adhesive, thereby increasing stability of the heat radiating sheet. A heat radiating sheet comprises a base film(110), a thermosetting adhesive layer(112) and a protection film layer(114). The thermosetting adhesive layer is formed in at least one side of the base film. The protection film layer is attached to the thermosetting adhesive layer. The base film is made from graphite or rubber-based material or acrylic-based material. To attach the protection film layer to the base film, the thermosetting adhesive layer is formed in at least one side of the base film.

Description

방열시트 및 이를 구비한 액정표시장치{THERMAL SPREAD SHIELD SHEET AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THEREOF}Heat dissipation sheet and liquid crystal display device having same {THERMAL SPREAD SHIELD SHEET AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THEREOF}

도 1은 본 발명의 제1실시예에 의한 방열시트를 나타낸 단면도.1 is a cross-sectional view showing a heat radiation sheet according to a first embodiment of the present invention.

도 2는 본 발명의 제2실시예에 의한 이형필름층을 더 포함하는 방열시트를 나타낸 단면도.Figure 2 is a cross-sectional view showing a heat radiation sheet further comprising a release film layer according to a second embodiment of the present invention.

도 3은 본 발명에 의한 방열시트가 부착된 액정표시장치를 나타낸 분해사시도.Figure 3 is an exploded perspective view showing a liquid crystal display device with a heat radiation sheet according to the present invention.

본 발명은 각종 전자제품에 사용하는 방열시트에 관한 것으로서, 흑연을 포함하는 열전도 매개체로 이루어진 베이스필름와 상기 베이스필름를 보호하는 보호필름층을 효과적으로 접착시켜 기포(bubble) 현상을 줄일 수 있는 열경화성 점착제층을 포함하는 방열시트에 관한 것이다.The present invention relates to a heat dissipation sheet for use in various electronic products, the thermosetting pressure-sensitive adhesive layer that can effectively reduce the bubble (bubble) by effectively bonding a base film made of a heat conductive medium containing graphite and a protective film layer for protecting the base film. It relates to a heat radiation sheet comprising.

일반적으로 전자제품은 시스템 특성상 열을 발산하는 구조로 되어 있어 여러 가지 열을 발산하기 위한 부품을 포함하고 있다. 전자제품의 경우 내부에서 발생하는 열을 해소하지 못하면 시스템 안정성에 심각한 불량을 야기할 수 있어 최근 방 열기구가 점차 중요해지고 있다. 전자제품에서 발생하는 열은 전자회로의 열화를 진행시키거나 불량을 야기하고 제품의 수명을 단축시키며, 심하면 폭발하거나 화재의 원인이 되는 등 많은 문제를 일으킬 수 있기 때문이다.In general, electronic products have a structure for dissipating heat due to system characteristics, and include components for dissipating various heat. In the case of electronic products, failure to dissipate heat generated internally can cause serious failure in system stability, and thus, a hot air balloon has become increasingly important in recent years. This is because heat generated in electronic products can cause many problems such as deterioration of electronic circuits, causing defects, shortening the lifespan of products, and even causing explosion or fire.

특히, 평판표시장치의 일종인 액정표시장치(LCD; Liquid Crystal Display Device)와 피디피(PDP; Plasma Display Panel)는 시스템 내부에서 많은 열을 발생하는 구조로 되어 있다. In particular, a liquid crystal display device (LCD) and a plasma display panel (PDP), which are types of flat panel displays, have a structure that generates a lot of heat inside the system.

액정표시장치의 경우에는 액정자체가 발광하는 성질이 없어 별도의 발광장치가 필요한데, 상기 발광장치에서는 많은 열이 발생한다. 열은 액정표시장치의 구동장치나 액정자체에 영향을 미칠 수가 있어 방열장치가 필요하다. In the case of the liquid crystal display device, since the liquid crystal itself emits no light, a separate light emitting device is required, which generates a lot of heat. Heat may affect the driving device of the liquid crystal display device or the liquid crystal itself, and thus a heat dissipation device is required.

피디피의 경우에는 기체 방전에 의해 생성된 플라즈마를 이용하여 영상을 표시하는 장치이다. 피디피는 내부에 고전압, 고전류가 발생하하므로 많은 열이 발생한다. 그러므로 피디피 또한 열을 해소할 수 있는 방열장치가 필요하다.In the case of PDP, an image is displayed by using a plasma generated by gas discharge. PD generates a lot of heat because it generates high voltage and high current inside. Therefore, PD also needs a heat sink to dissipate heat.

상기한 평판표시장치의 경우는 기존의 냉각장치나 방열장치를 사용할 경우, 최근의 추세인 박형화와 멀어지게 되며 동시에 소음이나, 부피가 증가하는 등의 문제가 있다. 따라서, 방열 효과도 있으면서 부피가 작은 방열시트가 많이 사용되었다. 방열시트는 넓은 판의 형태로 적은 부피를 가지며, 열을 발산하는 물체와의 사이에서 열을 효과적으로 차단할 수 있어 경량화, 슬림화가 요구되는 평판표시장치에 적합하다.In the case of the flat panel display device, when the existing cooling device or the heat dissipation device is used, the flat panel display device is far from the recent trend in thinning, and at the same time, there is a problem such as noise or volume increase. Therefore, the heat dissipation sheet having a small heat dissipation effect was used a lot. The heat dissipation sheet has a small volume in the form of a wide plate, and can effectively block heat between an object dissipating heat, and thus is suitable for a flat panel display device requiring weight and slimness.

방열시트는 베이스필름과, 상기 베이스필름의 양면에 부착되는 보호필름층과, 베이스필름과 보호필름층 사이에 형성된 열가소성 점착제로 이루어지며, 종래 의 방열시트는 베이스필름으로 고무 계열이나 아크릴 계열 등을 사용하는 것이 일반적이며 최근에는 열전도성이 우수한 흑연(graphite) 재질을 갖는 부재를 사용하여 방열시트를 만들고 있는 추세이다. The heat dissipation sheet is composed of a base film, a protective film layer attached to both sides of the base film, and a thermoplastic adhesive formed between the base film and the protective film layer. It is common to use, and in recent years, the trend is to make a heat radiation sheet using a member having a graphite (graphite) material having excellent thermal conductivity.

그러나 상기한 종래의 방열시트는 장시간 열에 노출시키게 되면 방열시트에 기포(bubble)가 발생하는 문제점이 있었다. 열가소성 점착제층은 열에 취약하여 지속적인 열이나 고온과 저온으로의 급격한 변화 등에 의해 수축과 이완을 반복하여 방열시트 표면에 기포를 형성한다. 특히 흑연재질의 방열시트는 흑연층을 겹겹이 적층하여 형성하는데, 열에 의해 최외각 흑연층이 인접 흑연층과 분리되어 기포가 발생하는 현상이 일어난다. 상기 기포는 방열시트의 양면 모두 발생할 수 있다.However, the conventional heat dissipation sheet has a problem that bubbles are generated in the heat dissipation sheet when exposed to heat for a long time. The thermoplastic pressure sensitive adhesive layer is vulnerable to heat and repeatedly forms a bubble on the surface of the heat dissipating sheet by repeating contraction and relaxation due to continuous heat or rapid change to high and low temperatures. In particular, the heat dissipation sheet of graphite material is formed by stacking graphite layers in layers, and the phenomenon occurs in which the outermost graphite layer is separated from the adjacent graphite layer by heat to generate bubbles. The bubble may occur on both sides of the heat dissipation sheet.

상기한 바와 같은 방열시트에서 생긴 기포는 상기 방열시트를 적용한 모든 제품, 특히 평판표시장치의 외관의 품질을 저하시킬 뿐만 아니라, 제품의 이송이나 기타 환경변화가 있을 때 타 부품과 간섭을 일으켜 이물을 발생시킨다. 무엇보다도 방열 기능이 저하되는 문제점이 생기게 된다.Bubbles generated from the heat dissipation sheet as described above not only deteriorate the appearance of all the products to which the heat dissipation sheet is applied, especially the flat panel display, but also cause foreign substances to interfere with other components when the product is transferred or other environmental changes occur. Generate. Above all, there is a problem that the heat dissipation function is reduced.

본 발명은 상기한 문제점을 해결하기 위해 발명한 것으로서, 방열시트에 발생하는 기포를 줄여 온도 안정성이 있는 방열시트를 제공하는 데 일차적인 목적이 있다. The present invention has been made to solve the above problems, the primary object is to provide a heat radiation sheet having a temperature stability by reducing the bubbles generated in the heat radiation sheet.

그외 상기 방열시트를 평판표시장치에 사용함으로써 방열효과를 향상시키고 방열시트 불량을 줄여 고품질의 평판표시장치를 제공하는 다른 목적이 있다. In addition, by using the heat dissipation sheet in the flat panel display device, there is another object to provide a high quality flat panel display device by improving the heat dissipation effect and reducing the heat dissipation sheet defect.

상기 목적을 달성하기 위한 본 발명에 의한 방열시트는 베이스필름과 상기 베이스필름의 적어도 일면에 형성된 열경화성 점착제층 및 상기 열경화성 점착제층에 부착된 보호필름층을 포함한다.The heat dissipation sheet according to the present invention for achieving the above object includes a base film and a thermosetting adhesive layer formed on at least one surface of the base film and a protective film layer attached to the thermosetting adhesive layer.

본 발명에 의한 방열시트는 상기 보호필름층의 한 면에 형성된 외부점착제층 및 상기 외부점착제층에 부착된 이형필름층을 더 포함할 수 있다.The heat dissipation sheet according to the present invention may further include an external adhesive layer formed on one surface of the protective film layer and a release film layer attached to the external adhesive layer.

상기 보호필름층은 PET(poly ethylene telephthalate)인 것이 바람직하다.The protective film layer is preferably PET (polyethylene telephthalate).

상기 열경화성 점착제층은 아크릴, 에폭시, 초산비닐 및 폴리우레탄 중 어느 하나를 포함하는 것을 특징으로 한다.The thermosetting pressure-sensitive adhesive layer is characterized in that it comprises any one of acrylic, epoxy, vinyl acetate and polyurethane.

상기 베이스필름은 흑연 재질로 형성된다.The base film is formed of a graphite material.

본 발명은 상기 방열시트를 구비한 같은 평판표시장치를 포함한다. 상기 평판표시장치는 플라즈마디스플레이패널(PDP, Plasma Display Panel)과 액정표시장치일 수 있다. The present invention includes the same flat panel display device having the heat dissipation sheet. The flat panel display device may be a plasma display panel (PDP) and a liquid crystal display device.

상기 액정표시소자는 액정패널과 상기 액정패널의 하부에 구비된 백라이트유닛 및 상기 백라이트유닛의 하부에 구비된 방열시트를 포함하며 구성되며, 상기 방열시트는, 베이스필름과 상기 베이스필름의 양면에 형성된 열경화성 점착제층 및 상기 열경화성 점착제층에 부착된 보호필름층을 포함한다. The liquid crystal display device includes a liquid crystal panel, a backlight unit provided under the liquid crystal panel, and a heat dissipation sheet provided under the backlight unit, wherein the heat dissipation sheet is formed on both sides of the base film and the base film. It includes a thermosetting pressure-sensitive adhesive layer and a protective film layer attached to the thermosetting pressure-sensitive adhesive layer.

이때 상기 백라이트유닛은 상기 액정패널의 하부에 구비된 광원과, 상기 광원의 하부에 구비된 반사판을 포함한다.In this case, the backlight unit includes a light source provided under the liquid crystal panel, and a reflecting plate provided under the light source.

상기 액정표시장치에 의한 방열시트는 상기 보호필름층에 형성된 외부점착제층 및 상기 외부점착제층에 부착된 이형필름층을 더 포함할 수 있다.The heat dissipation sheet by the liquid crystal display may further include an external adhesive layer formed on the protective film layer and a release film layer attached to the external adhesive layer.

이때, 상기 열경화성 점착제층은 아크릴, 에폭시, 초산비닐 및 폴리우레탄 중 어느 하나의 재질인 것을 특징으로 하며, 상기 베이스필름은 흑연 재질로 형성된 것을 특징으로 한다.At this time, the thermosetting pressure-sensitive adhesive layer is characterized in that the material of any one of acrylic, epoxy, vinyl acetate and polyurethane, the base film is characterized in that formed of graphite material.

이하 도면을 참조하여 본 발명에 의한 방열시트와 평판표시장치를 설명한다.Hereinafter, a heat dissipation sheet and a flat panel display device according to the present invention will be described with reference to the drawings.

도 1은 본 발명의 제1실시예에 의한 방열시트를 나타낸 단면도이다.1 is a cross-sectional view showing a heat radiation sheet according to a first embodiment of the present invention.

본 발명에 의한 방열시트는 베이스필름(110)과 베이스필름의 적어도 일면에 형성된 열경화성 점착제층(112) 및 상기 열경화성 점착제층(112)에 부착된 보호필름층(114)을 포함한다. The heat dissipation sheet according to the present invention includes a base film 110 and a thermosetting adhesive layer 112 formed on at least one surface of the base film and a protective film layer 114 attached to the thermosetting adhesive layer 112.

도면에서는 편의상 베이스필름(110)의 양면에 열경화성 점착제층(112)을 형성한 경우를 나타내었다.For convenience, the thermosetting adhesive layer 112 is formed on both surfaces of the base film 110 for convenience.

베이스필름(110)은 얇은 방열효과가 좋은 물질로 형성된다. 특히 열전도성이 높은 물질로 된 것이 바람직하다. 베이스필름(110)은 흑연이나 고무 계열이나 아크릴 계열 등의 재질로 형성된다. 특히 흑연 재질로 형성된 베이스필름은 겹겹이 적층된 흑연층을 포함한다. 상기 적층된 흑연층은 편상구조의 흑연을 발포하고 고압으로 압연하여 시트형태로 형성한다.The base film 110 is formed of a material having a good thin heat dissipation effect. In particular, it is preferable that the material is made of a material having high thermal conductivity. The base film 110 is formed of a material such as graphite, rubber or acrylic. In particular, the base film formed of a graphite material includes a graphite layer stacked in layers. The laminated graphite layer is formed in a sheet form by foaming graphite having a flaky structure and rolling at high pressure.

상기 베이스필름(110)의 적어도 일면에는 보호하기 위한 보호필름층(114)이 구비된다. 상기 보호필름층(114)은 베이스필름을 보호할 수 있는 것이면 특별히 제한되지 않으나 폴리에틸렌테레프탈레이트(PET, Poly Ethylene Telephthalate)로 형성된 것이 바람직하다.At least one surface of the base film 110 is provided with a protective film layer 114 for protection. The protective film layer 114 is not particularly limited as long as it can protect the base film, but preferably formed of polyethylene terephthalate (PET, Poly Ethylene Telephthalate).

보호필름층(114)을 베이스필름에 부착하기 위해서 열경화성 점착층(112)을 베이스필름(110)의 적어도 일면에 형성한다. 열경화성 점착제층(112)은 한번 열을 가하여 접착을 시킨 이후에는 딱딱하게 경화된다. 따라서 외부의 온도에 따라 수축이나 이완하는 성질이 없어 베이스필름(110)이나 보호필름층(114)에 수축이나 이완으로 인한 스트레스를 가하지 않게 되어 기포의 생성이 감소한다.In order to attach the protective film layer 114 to the base film, a thermosetting adhesive layer 112 is formed on at least one surface of the base film 110. The thermosetting pressure-sensitive adhesive layer 112 is hardened after applying heat once to bond. Therefore, there is no shrinkage or relaxation property according to the external temperature, so that the base film 110 or the protective film layer 114 does not apply stress due to shrinkage or relaxation, thereby reducing the generation of bubbles.

실제로, 상기 본 발명의 제1실시예에 의한 방열시트에 대해 열 신뢰도 테스트를 한 결과, 기포 발생이 현저히 줄어든다. 흑연 재질의 베이스필름을 포함하는 방열시트로 열 신뢰도 테스트를 하였으며, 온도를 -40℃에서 30분, 65℃까지 올린 후 30분씩 유지하며, 온도를 100회에 걸쳐서 반복하여 변화시켰다. 그 결과 열가소성 점착제를 사용한 방열시트에는 기포가 발생하였으나 열경화성 점착제를 사용한 방열시트에는 기포가 발생하지 않았다. In fact, as a result of the thermal reliability test on the heat dissipation sheet according to the first embodiment of the present invention, bubble generation is significantly reduced. The thermal reliability test was performed with a heat dissipation sheet including a base film made of graphite. The temperature was raised to 30 minutes at 65 ° C. and maintained at 65 ° C. for 30 minutes, and the temperature was repeatedly changed over 100 times. As a result, bubbles were generated in the heat dissipation sheet using the thermoplastic adhesive, but bubbles were not generated in the heat dissipation sheet using the thermosetting adhesive.

본 발명의 제2실시예에 의한 방열시트는 도 2에 도시한 바와 같이 베이스필름(210)과, 베이스필름(210)의 적어도 일면에 형성된 열경화성 점착제층(212)과, 상기 열경화성 점착제층에 부착된 보호필름층(214)과, 상기 보호필름층(214)에 형성된 외부점착제층(216) 및 상기 외부점착제층(216)에 부착된 이형필름층(218)을 포함한다. 외부점착체층(216)과 이형필름층(218)은 상기 베이스필름의 양면방향에 모두 형성될 수 있다.The heat dissipation sheet according to the second embodiment of the present invention is attached to the base film 210, the thermosetting pressure-sensitive adhesive layer 212 formed on at least one surface of the base film 210, and the thermosetting pressure-sensitive adhesive layer as shown in FIG. The protective film layer 214, the external adhesive layer 216 formed on the protective film layer 214, and the release film layer 218 attached to the external adhesive layer 216. The external adhesive layer 216 and the release film layer 218 may be formed on both sides of the base film.

상기 외부점착제층(216)과 이형필름층(218)은 방열시트를 타 기구(피착체)에 부착하기 위해 형성한다. 상기 방열시트를 피착체에 부착하려면 상기 이형필름층(216)을 제거하고 외부점착제층(216)을 타 기구에 접촉시킨다.The external adhesive layer 216 and the release film layer 218 are formed to attach the heat dissipation sheet to other devices (adhered body). To attach the heat dissipation sheet to the adherend, the release film layer 216 is removed and the external adhesive layer 216 is brought into contact with the other equipment.

외부점착제층(216)은 열경화성 점착제와, 열가소성 점착제를 모두 사용 가능 하다. 다만, 열에 의해 안정적인 열경화성 점착제를 사용하는 것이 바람직할 것이다.The external adhesive layer 216 may use both a thermosetting adhesive and a thermoplastic adhesive. However, it would be desirable to use a thermosetting adhesive that is stable by heat.

이형필름층(218)은 이후 제거될 필름이므로 외부점착제층에 부착과 탈착이 용이한 것이 좋으며 다양한 필름을 사용할 수 있다. 상기 이형필름층(218)은 보호필름층(218)의 바깥쪽 면 중 어느 한 면에 부착되며, 필요에 따라서는 양면에 부착될 수 있다. Since the release film layer 218 is a film to be removed later, it is preferable to easily attach and detach the external adhesive layer, and various films may be used. The release film layer 218 is attached to any one of the outer surface of the protective film layer 218, it may be attached to both sides as necessary.

이때 이형필름층(218)은 이후 방열시트의 기구에의 부착시 제거되는 부분으로, 상기 방열시트에서 이형필름층(218)을 제거한 후 방열시트를 피착체에 부착시킬 수 있다. 즉, 먼저 이형필름층(218)을 제거한 후 외부점착제층(216) 부분을 방열시트를 붙이고자 하는 기구에 접촉시켜 방열시트를 부착하게 된다.At this time, the release film layer 218 is removed after the attachment of the heat dissipation sheet to the mechanism, and after removing the release film layer 218 from the heat dissipation sheet may attach the heat dissipation sheet to the adherend. That is, the release film layer 218 is first removed, and then the heat-adhesive sheet is attached by bringing the external adhesive layer 216 into contact with the mechanism to which the heat-radiating sheet is to be attached.

상기 방열시트는 방열이 필요한 전자기구에 사용이 가능하며, 그 중 열이 많이 발생하는 평판표시장치, 예를 들어 액정표시장치나 피디피에도 사용이 가능하다. The heat dissipation sheet may be used in electronic devices that require heat dissipation, and may be used in flat panel displays that generate a lot of heat, for example, liquid crystal displays or PDs.

도 3은 본 발명에 의한 방열시트가 부착된 액정표시장치를 나타낸 분해사시도이다. 이하, 액정표시장치에서 화상이 표현되는 방향을 상부, 반대방향을 하부로 하여 설명한다.3 is an exploded perspective view showing a liquid crystal display device with a heat dissipation sheet according to the present invention. Hereinafter, the direction in which an image is expressed in the liquid crystal display device will be described with the upper direction and the opposite direction as the lower side.

액정패널(310)은 비발광소자이기 때문에 액정패널(310)의 후면에는 빛을 공급하기 위한 백라이트유닛(320)이 위치한다. Since the liquid crystal panel 310 is a non-light emitting device, a backlight unit 320 for supplying light is disposed on the rear surface of the liquid crystal panel 310.

백라이트유닛(320)은 액정패널(310)의 하부에 배치된 복수 개의 광학시 트(323)와, 광학시트(323)의 하부에 배치된 복수의 광원(321)과, 광원(321)의 하부에 배치된 반사판(322)을 포함한다. 상기 백라이트유닛(320)은 광원(321)의 상부에 광학시트(323)를 더 포함할 수 있다. 상기 광학시트는 보호시트, 프리즘시트 및 확산시트 등을 적층한 것이다.The backlight unit 320 includes a plurality of optical sheets 323 disposed under the liquid crystal panel 310, a plurality of light sources 321 disposed under the optical sheet 323, and a lower portion of the light source 321. It includes a reflector plate 322 disposed in. The backlight unit 320 may further include an optical sheet 323 on the light source 321. The optical sheet is a laminate of a protective sheet, a prism sheet, a diffusion sheet, and the like.

상기 백라이트유닛(320)의 하부, 즉 반사판(322)의 하부에는 백라이트유닛(320)에서 나온 열을 방열하기 위한 방열시트(330)가 배치된다. A heat dissipation sheet 330 for dissipating heat from the backlight unit 320 is disposed below the backlight unit 320, that is, under the reflection plate 322.

이러한 백라이트유닛(320)은 메인서포트(327)에 의해 가장자리가 고정되어 방열시트(330)와 함께 보텀커버(329)에 수납되며, 상기 보텀커버(329)는 액정패널(310)의 상부에 위치하며 유효면을 노출시키는 표시창을 갖는 탑케이스(325)와 결합하여 액정패널(310)과 백라이트유닛(320)을 수납한다. The backlight unit 320 is fixed to the edge by the main support 327 is accommodated in the bottom cover 329 together with the heat dissipation sheet 330, the bottom cover 329 is located above the liquid crystal panel 310 The liquid crystal panel 310 and the backlight unit 320 are housed in combination with the top case 325 having the display window exposing the effective surface.

이때 방열시트는 제1실시예나 제2실시예에 의한 것을 모두 적용할 수 있다. 특히 제2실시예에 의한 방열시트의 경우 이형필름을 제거하고 반사판이나 보텀커버의 적어도 한쪽에 외부점착제를 사이에 두고 부착될 수 있다.At this time, the heat dissipation sheet may be applied to all of the first embodiment or the second embodiment. In particular, in the case of the heat dissipation sheet according to the second embodiment, the release film may be removed and attached to at least one of the reflecting plate or the bottom cover with an external adhesive therebetween.

이상 설명한 내용을 통해 당업자라면 본 발명의 사상의 범위 내에서 다양한 변경 및 수정이 가능함은 당연하다. 예를 들어 본 발명은 액정표시장치의 백라이트유닛의 하부와 보텀커버 사이에 방열시트를 배치시키는 것을 예로 들었으나 보텀커버의 하부에 형성하는 것도 가능할 것이다. 뿐만아니라, 다른 평판표시장치인 피디피에도 적용이 가능하며 평판표시장치가 아니더라도 전자제품의 열을 제거하기 위해서라면 얼마든지 적용이 가능할 것이다.It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the spirit of the present invention. For example, in the present invention, the heat dissipation sheet is disposed between the bottom of the backlight unit of the liquid crystal display and the bottom cover, but it may be formed on the bottom of the bottom cover. In addition, it can be applied to other flat panel display devices such as PD, and even if the flat panel display device to remove the heat of the electronics as much as possible.

따라서, 본 발명의 실시예는 상기한 실시예에만 한정되는 것은 아니며, 본 발명의 권리 범위는 상세한 설명에 기재된 내용이 아니라 청구 범위에 기재된 범위에 의해 정해져야 할 것이다.Accordingly, embodiments of the present invention are not limited to the above-described embodiments, and the scope of the present invention should be defined by the scope of the claims rather than the contents of the detailed description.

전술한 바와 같이 흑연 재질의 베이스필름를 가진 방열시트에 열경화성 점착제를 사용하여 보호필름층을 형성하게 되면, 발열시트의 기포 발생을 줄여 불량을 감소시킬 수 있는 효과가 있다. 따라서 방열시트의 안정성이 증가하며, 상기 방열시트를 사용하여 각종 전자제품과 평판표시장치, 특히 액정표시장치에 사용함으로써 고품질의 열적 안정성이 있는 제품을 제공할 수 있다.As described above, when the protective film layer is formed by using the thermosetting adhesive on the heat dissipation sheet having the base film of graphite material, there is an effect of reducing defects by reducing bubbles in the heat generating sheet. Therefore, the stability of the heat dissipation sheet is increased, and by using the heat dissipation sheet in various electronic products and flat panel display devices, especially liquid crystal display devices, it is possible to provide a product having high thermal stability.

Claims (10)

베이스필름;Base film; 상기 베이스필름의 적어도 일면에 형성된 열경화성 점착제층; 및 A thermosetting adhesive layer formed on at least one surface of the base film; And 상기 열경화성 점착제층에 부착된 보호필름층을 포함하는 방열시트.A heat dissipation sheet comprising a protective film layer attached to the thermosetting adhesive layer. 제1항에 있어서, The method of claim 1, 상기 보호필름층의 한 면에 형성된 외부점착제층; 및An external adhesive layer formed on one surface of the protective film layer; And 상기 외부점착제층에 부착된 이형필름층을 더 포함하는 방열시트.A heat dissipation sheet further comprising a release film layer attached to the external adhesive layer. 제1항에 있어서,The method of claim 1, 상기 보호필름층은 PET(poly ethylene telephthalate)인 것을 특징으로 하는 방열시트.The protective film layer is a heat radiation sheet, characterized in that polyethylene (polyethylene telephthalate). 제1항에 있어서,The method of claim 1, 상기 열경화성 점착제층은 아크릴, 에폭시, 초산비닐 및 폴리우레탄 중 어느 하나를 포함하는 것을 특징으로 하는 방열시트.The thermosetting pressure-sensitive adhesive layer is a heat dissipation sheet, characterized in that it comprises any one of acrylic, epoxy, vinyl acetate and polyurethane. 제1항 내지 제4항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 4, 상기 베이스필름은 흑연 재질로 형성된 것을 특징으로 하는 방열시트.The base film is a heat radiation sheet, characterized in that formed of graphite material. 액정패널;A liquid crystal panel; 상기 액정패널의 하부에 구비된 백라이트유닛; 및A backlight unit provided below the liquid crystal panel; And 상기 백라이트유닛의 하부에 구비된 방열시트를 포함하며 구성되며,It is configured to include a heat dissipation sheet provided in the lower portion of the backlight unit, 상기 방열시트는,The heat dissipation sheet, 베이스필름;Base film; 상기 베이스필름의 양면에 형성된 열경화성 점착제층; 및Thermosetting adhesive layer formed on both sides of the base film; And 상기 열경화성 점착제층에 부착된 보호필름층을 포함하는 것을 특징으로 하는 액정표시장치.And a protective film layer attached to the thermosetting adhesive layer. 제6항에 있어서,The method of claim 6, 상기 백라이트유닛은,The backlight unit, 상기 액정패널의 하부에 구비된 광원;A light source provided under the liquid crystal panel; 상기 광원의 하부에 구비된 반사판을 포함하는 것을 특징으로 하는 액정표시소자.And a reflecting plate provided under the light source. 제6항에 있어서,The method of claim 6, 상기 방열시트는 상기 보호필름층에 형성된 외부점착제층; 및The heat dissipation sheet is an external adhesive layer formed on the protective film layer; And 상기 외부점착제층에 부착된 이형필름층을 더 포함하는 액정표시장치.And a release film layer attached to the external adhesive layer. 제6항에 있어서,The method of claim 6, 상기 열경화성 점착제층은 아크릴, 에폭시, 초산비닐 및 폴리우레탄 중 어느 하나의 재질인 것을 특징으로 하는 액정표시장치.The thermosetting adhesive layer is a liquid crystal display device, characterized in that the material of any one of acrylic, epoxy, vinyl acetate and polyurethane. 제6항 내지 제9항 중 어느 한 항에 있어서,The method according to any one of claims 6 to 9, 상기 베이스필름은 흑연 재질로 형성된 것을 특징으로 하는 액정표시장치.And the base film is formed of graphite material.
KR1020060105342A 2006-10-27 2006-10-27 Thermal spread shield sheet and liquid crystal display device having thereof KR20080037983A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020060105342A KR20080037983A (en) 2006-10-27 2006-10-27 Thermal spread shield sheet and liquid crystal display device having thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020060105342A KR20080037983A (en) 2006-10-27 2006-10-27 Thermal spread shield sheet and liquid crystal display device having thereof

Publications (1)

Publication Number Publication Date
KR20080037983A true KR20080037983A (en) 2008-05-02

Family

ID=39646839

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020060105342A KR20080037983A (en) 2006-10-27 2006-10-27 Thermal spread shield sheet and liquid crystal display device having thereof

Country Status (1)

Country Link
KR (1) KR20080037983A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100980841B1 (en) * 2008-07-16 2010-09-10 한솔엘씨디 주식회사 Both faces lighting display device
KR20150096049A (en) * 2014-02-14 2015-08-24 한국기술교육대학교 산학협력단 Foldable air tube helmet

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100980841B1 (en) * 2008-07-16 2010-09-10 한솔엘씨디 주식회사 Both faces lighting display device
KR20150096049A (en) * 2014-02-14 2015-08-24 한국기술교육대학교 산학협력단 Foldable air tube helmet

Similar Documents

Publication Publication Date Title
US9482885B2 (en) Display device and method of manufacturing the same
US10816713B2 (en) Surface light source device, display device, and electronic device
US9442316B2 (en) Display device comprising a light-transmitting cover having a lens portion
KR102119532B1 (en) Display apparatus
US9202398B2 (en) Display module of display device
JP2008026866A (en) Display device
US20100265430A1 (en) Display device with conductive masking film for discharging static electricity
KR20160012294A (en) Composite sheet and display device comprising the same
KR20160095568A (en) Display appartus
JP4231028B2 (en) Shield cover and liquid crystal display device using the same
KR20200000510A (en) Flexible substrate and display apparatus including the same
US9389445B2 (en) Electro-optic device and electronic apparatus
JP2009122398A (en) Display equipment
KR102543807B1 (en) Display device
US20170034928A1 (en) Display device
KR20120136270A (en) Display apparatus
CN114284449A (en) Display module and display device
WO2019178744A1 (en) Flexible cover plate, flexible component, and electronic device
KR20170069349A (en) Display device
KR20080037983A (en) Thermal spread shield sheet and liquid crystal display device having thereof
TW201426128A (en) Light source module, backlight module and liquid crystal display device
JP2017187711A (en) Display device
KR20080089415A (en) Display module which is to be mounted on a pcb
KR20170026715A (en) Display device
JP2020102306A (en) Backlight and display device

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination