JP2014081394A - Display device - Google Patents
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- JP2014081394A JP2014081394A JP2011031820A JP2011031820A JP2014081394A JP 2014081394 A JP2014081394 A JP 2014081394A JP 2011031820 A JP2011031820 A JP 2011031820A JP 2011031820 A JP2011031820 A JP 2011031820A JP 2014081394 A JP2014081394 A JP 2014081394A
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- circuit board
- display device
- drive circuit
- display panel
- ground pattern
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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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- 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
- G02F1/133322—Mechanical guidance or alignment of LCD panel support components
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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
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
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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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- 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
本発明は表示装置に関するものであり、特に、回路基板に搭載された駆動回路の放熱構造に関するものである。 The present invention relates to a display device, and more particularly to a heat dissipation structure for a drive circuit mounted on a circuit board.
従来の表示装置は、光源を支持するバックライトシャーシの正面に、映像を表示する表示パネルに向けて光を拡散する光学シートを配置して、該光学シートの正面側周縁部分に取付体を配置し、該取付体により光学シートをバックライトシャーシに取り付けていた。 In the conventional display device, an optical sheet that diffuses light toward a display panel that displays an image is disposed on the front surface of the backlight chassis that supports the light source, and a mounting body is disposed on the front side peripheral portion of the optical sheet. However, the optical sheet is attached to the backlight chassis by the attachment body.
図７（ａ）は、従来の表示装置の一例として、特許文献１の表示装置１００の構造を示した断面図である。表示装置１００は、光学シート１０７の正面縁部に、スペーサ１０８を介して、パネル支持枠１０９が設けられている。パネル支持枠１０９の正面にて、映像表示する表示パネル１１０が支持されている。表示パネル１１０の正面縁部には可撓体１１１を介してベゼル１１２が設けられている。また、パネル支持枠１０９には、表示パネル１１０を駆動するための回路基板１１５が設けられている。 FIG. 7A is a cross-sectional view showing the structure of the display device 100 of Patent Document 1 as an example of a conventional display device. In the display device 100, a panel support frame 109 is provided on the front edge portion of the optical sheet 107 via a spacer 108. A display panel 110 that displays an image is supported in front of the panel support frame 109. A bezel 112 is provided on the front edge of the display panel 110 via a flexible body 111. The panel support frame 109 is provided with a circuit board 115 for driving the display panel 110.
図７（ｂ）は、回路基板１１５が取り付けられているＡ部を拡大した図面である。図７（ｂ）に示すように、回路基板１１５は、表示パネル１１０を駆動する駆動回路１１６を搭載し、塵埃が入り込まないように密閉された表示装置１００の内部に配置されていた。このため、駆動回路１１６から発せられる熱は、外部に直接放熱されることがなく、例えば、パネル支持枠１０９ｂからバックライトシャーシ１０４ｃに少しずつ伝わり、バックライトシャーシ１０４の全体に拡散する等して放熱されていた。 FIG. 7B is an enlarged view of part A to which the circuit board 115 is attached. As shown in FIG. 7B, the circuit board 115 has a driving circuit 116 for driving the display panel 110 and is disposed inside the display device 100 which is sealed so that dust does not enter. For this reason, the heat generated from the drive circuit 116 is not directly radiated to the outside. For example, the heat is transmitted little by little from the panel support frame 109b to the backlight chassis 104c and diffused throughout the backlight chassis 104. It was radiating heat.
しかしながら、近年、表示パネル１１０の大型化に伴い、回路基板１１５に実装される駆動回路１１６の発熱量が増加しており、図７（ｂ）に示す従来の構造では放熱が追いつかず、駆動回路１１６の温度が上昇し、信頼性が低下する問題があった。 However, in recent years, with the increase in the size of the display panel 110, the amount of heat generated by the drive circuit 116 mounted on the circuit board 115 has increased, and the conventional structure shown in FIG. There was a problem that the temperature of 116 increased and the reliability decreased.
そこで本発明は、上記課題を解決するためになされたものであり、その目的は、密閉された表示装置においても、内部に配置された駆動回路の熱を十分に放熱することができる表示装置を提供することにある。 Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a display device that can sufficiently dissipate heat of a drive circuit disposed inside even in a sealed display device. It is to provide.
表示パネルと、表示パネルの周縁部を外側から保持する金属製ベゼルと、表示パネルを駆動する駆動回路と、駆動回路を搭載する回路基板とを備えた表示装置であって、回路基板は、表面にグランドパターンを有しており、金属製ベゼルは、内面に凸部が設けられ、凸部は、グランドパターンと接触されていることを特徴とする。 A display device comprising: a display panel; a metal bezel that holds the peripheral edge of the display panel from the outside; a drive circuit that drives the display panel; and a circuit board on which the drive circuit is mounted. The metal bezel has a convex portion on the inner surface, and the convex portion is in contact with the ground pattern.
本発明によれば、表示装置の密閉内部に配置された駆動回路の熱を効率よく放熱することができ、駆動回路の温度が上昇して、信頼性が低下することを防止できる。 ADVANTAGE OF THE INVENTION According to this invention, the heat of the drive circuit arrange | positioned inside the airtight inside of a display apparatus can be thermally radiated efficiently, and it can prevent that the temperature of a drive circuit rises and reliability falls.
以下、図面を参照して、本発明の実施の形態について説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図１は、本発明の実施例１に係る表示装置１の概略構成を示す断面図である。表示装置１は、表示パネル２を備え、表示パネル２の背面側にはバックライトユニット３が配置されている。表示パネル２は、ＴＦＴ（薄膜トランジスタ）基板２１とＣＦ（カラーフィルタ）基板２２とからなる一対の基板間に液晶が充填されている。この表示パネル２は、バックライトユニット３から照射される光を透過して、正面側に画像として表示する。 FIG. 1 is a cross-sectional view illustrating a schematic configuration of a display device 1 according to a first embodiment of the invention. The display device 1 includes a display panel 2, and a backlight unit 3 is disposed on the back side of the display panel 2. In the display panel 2, liquid crystal is filled between a pair of substrates including a TFT (thin film transistor) substrate 21 and a CF (color filter) substrate 22. The display panel 2 transmits light emitted from the backlight unit 3 and displays it as an image on the front side.
バックライトユニット３は、浅底の略箱形状の金属製シャーシ４を備えており、その内部には、光源となる複数本のＣＣＦＬ（冷陰極型蛍光ランプ）５と、ＣＣＦＬ５の光を表示パネル２側に反射させる反射シート６が備えられている。金属製シャーシ４の正面側には、表示パネル２に入射する光を調整する光学シート７が設置されている。光学シート７は、拡散板、拡散シート、レンズシート、偏光シートなどの光学部材が積層されている。 The backlight unit 3 includes a shallow, substantially box-shaped metal chassis 4, in which a plurality of CCFLs (cold cathode fluorescent lamps) 5 serving as light sources and CCFL 5 light are displayed on a display panel. A reflection sheet 6 is provided for reflection on the second side. An optical sheet 7 for adjusting light incident on the display panel 2 is installed on the front side of the metal chassis 4. The optical sheet 7 is laminated with optical members such as a diffusion plate, a diffusion sheet, a lens sheet, and a polarizing sheet.
光学シート７の正面縁部には、枠状の樹脂製フレーム８が被着され、金属製シャーシ４と樹脂製フレーム８とにより光学シート７が挟持されている。また、樹脂製フレーム８の正面縁部には表示パネル２が設置されている。表示パネル２の正面縁部には枠状の金属製ベゼル９が被着され、金属製ベゼル９と樹脂製フレーム８とにより表示パネル２が挟持されている。 A frame-shaped resin frame 8 is attached to the front edge of the optical sheet 7, and the optical sheet 7 is sandwiched between the metal chassis 4 and the resin frame 8. A display panel 2 is installed on the front edge of the resin frame 8. A frame-shaped metal bezel 9 is attached to the front edge of the display panel 2, and the display panel 2 is sandwiched between the metal bezel 9 and the resin frame 8.
金属製ベゼル９は、ステンレス等の金属製の板材からプレス加工等により開口した四辺形の枠形状に形成されている。金属製ベゼル９の各辺は、上壁９ａと側壁９ｂを有した断面が逆Ｌ字状の形状を有しており、側壁９ｂは背面側に向って起立している。この金属製ベゼル９は、表示パネル２を保持する機能や保護する機能を有する部材であり、表示パネル２の正面縁部および側面部を覆うように被着されている。 The metal bezel 9 is formed in a quadrilateral frame shape opened from a metal plate material such as stainless steel by pressing or the like. Each side of the metal bezel 9 has an inverted L-shaped cross section having an upper wall 9a and a side wall 9b, and the side wall 9b stands up toward the back side. The metal bezel 9 is a member having a function of holding the display panel 2 and a function of protecting the display panel 2, and is attached so as to cover the front edge portion and the side surface portion of the display panel 2.
また、金属製ベゼル９の内側には、表示パネル２を駆動する回路基板１０が備えられている。この回路基板１０は、ＳＯＦ(System On Film)１１でＴＦＴ基板２１に形成されたソース配線２３等と接続されている。図１に示すように、回路基板１０は、金属製ベゼル９の側壁部と平行に配置することにより、表示装置１の額縁幅を小さくして配置することができる。 A circuit board 10 for driving the display panel 2 is provided inside the metal bezel 9. The circuit board 10 is connected to a source wiring 23 and the like formed on the TFT substrate 21 by an SOF (System On Film) 11. As shown in FIG. 1, the circuit board 10 can be arranged with a small frame width of the display device 1 by arranging the circuit board 10 in parallel with the side wall portion of the metal bezel 9.
図２は、回路基板１０とＳＯＦ１１が接続された状態を示す平面図である。回路基板１０には、図示しない絶縁層や配線層が積層され、各層間がスルーホールで接続された多層基板１０ａが用いられている。回路基板１０の中央部には、駆動回路２０が搭載されており、回路基板１０に形成された配線１２により、電源やグランド、データ配線等と接続されている。また、配線１２は、回路基板１０の縁部に延設され、ＳＯＦ１１を接続するための信号端子１３や、信号端子１３と一緒に並設された予備のダミー端子１４が設けられている。信号端子１３にはＳＯＦ１１が接続されて、駆動回路２０とＴＦＴ基板２１との信号の入出力が行なわれる。 FIG. 2 is a plan view showing a state in which the circuit board 10 and the SOF 11 are connected. The circuit board 10 uses a multilayer board 10a in which insulating layers and wiring layers (not shown) are stacked and the respective layers are connected by through holes. A drive circuit 20 is mounted at the center of the circuit board 10, and is connected to a power source, a ground, a data wiring, and the like by a wiring 12 formed on the circuit board 10. In addition, the wiring 12 is provided at the edge of the circuit board 10 and is provided with a signal terminal 13 for connecting the SOF 11 and a spare dummy terminal 14 provided in parallel with the signal terminal 13. The SOF 11 is connected to the signal terminal 13, and signal input / output between the drive circuit 20 and the TFT substrate 21 is performed.
また、回路基板１０の表面には、外部からのノイズの混入を防ぐために、金属膜で形成されたグランドパターン１５が設けられ、グランドの電位に接続されている。さらに、回路基板１０の表面は、接続部を除いてソルダーレジストに覆われ、配線１２などの金属膜の腐食を防止し保護している。 Further, a ground pattern 15 formed of a metal film is provided on the surface of the circuit board 10 in order to prevent external noise from entering, and is connected to the ground potential. Further, the surface of the circuit board 10 is covered with a solder resist except for the connection portion, and prevents and protects the metal film such as the wiring 12 from being corroded.
本発明の実施例1は、金属製ベゼル９の内面に、回路基板１０のグランドパターン１５に対応して、凸部９ｃが設けられていることを特徴としている。凸部９ｃは、金属製の部材であり、金属製ベゼル９と一体に金属製の板材をプレス加工して形成したり、別体として金属製ベゼル９に取り付けられる。この凸部９ｃが回路基板１０のグランドパターン１５と接触することにより、回路基板１０に搭載された駆動回路２０の発熱を金属製ベゼル９に熱伝導させて放熱することができる。 The first embodiment of the present invention is characterized in that a convex portion 9 c is provided on the inner surface of the metal bezel 9 corresponding to the ground pattern 15 of the circuit board 10. The convex portion 9 c is a metal member, and is formed by pressing a metal plate integrally with the metal bezel 9 or attached to the metal bezel 9 as a separate body. When the convex portion 9 c comes into contact with the ground pattern 15 of the circuit board 10, the heat generated by the drive circuit 20 mounted on the circuit board 10 can be conducted to the metal bezel 9 to be radiated.
グランドパターン１５において、凸部９ｃが接触する部分は、図２の破線９ｃと９ｄで示す、駆動回路２０の周辺部分である。したがって、凸部９ｃの中央は、駆動回路２０が当たらないように、破線９ｄのように凹部になっている。 In the ground pattern 15, the portion where the convex portion 9 c comes into contact is the peripheral portion of the drive circuit 20 indicated by broken lines 9 c and 9 d in FIG. 2. Therefore, the center of the convex portion 9c is a concave portion as shown by a broken line 9d so that the drive circuit 20 does not hit.
金属製ベゼル９は、凹部９ｄを回路基板１０の駆動回路２０に対応させながら、表示装置１の側面側から嵌め込まれて、金属製ベゼル９の凸部９ｃがグランドパターン１５と接触して取り付けられる。 The metal bezel 9 is fitted from the side surface side of the display device 1 with the recess 9 d corresponding to the drive circuit 20 of the circuit board 10, and the protrusion 9 c of the metal bezel 9 is attached in contact with the ground pattern 15. .
このように、駆動回路２０の周辺部において、グランドパターン１５が金属製ベゼル９の凸部９ｃと接触することにより、駆動回路２０の発熱は、熱伝導性の優れた金属材料であるグランドパターン１５と凸部９ｃを伝熱して、金属製ベゼル９に熱伝導されるので、駆動回路２０の発熱を効率よく金属製ベゼル９の外側に放熱することができる。このため、駆動回路２０が温度上昇して信頼性が低下することを防止できる。 As described above, the ground pattern 15 comes into contact with the convex portion 9c of the metal bezel 9 in the peripheral portion of the drive circuit 20, so that the heat generated in the drive circuit 20 is the ground pattern 15 that is a metal material having excellent thermal conductivity. Since the heat is transferred to the metal bezel 9 by transferring heat to the convex portion 9c, the heat generated by the drive circuit 20 can be efficiently radiated to the outside of the metal bezel 9. For this reason, it is possible to prevent the reliability of the drive circuit 20 from increasing due to temperature rise.
また、グランドパターン１５が凸部９ｃと接触して、金属製ベゼル９と電気的に導通することにより、グランドの電位が強化され、回路基板１０に静電気が蓄積され難くなり、ＥＳＤ（Electro-Static Discharge）による駆動回路２０の破壊を防止することができる。 Further, the ground pattern 15 comes into contact with the convex portion 9c and is electrically connected to the metal bezel 9, so that the potential of the ground is strengthened and static electricity is hardly accumulated on the circuit board 10, and ESD (Electro-Static) It is possible to prevent the drive circuit 20 from being destroyed by discharge.
図３は、表示装置１において回路基板１０の最適な配置を示す断面模式図である。図１に示した表示装置１の上部の構造と、図３に示す、表示装置１の脚部３０に近い下部は、同様の構造となっている。そして、矢印で示すように、ＣＣＦＬ５等から発する熱は、表示装置１の内部を上昇して上部に蓄積されるため、金属製ベゼル９の温度は、表示装置１の上部よりも下部の方が低くなっている。 FIG. 3 is a schematic cross-sectional view showing an optimal arrangement of the circuit board 10 in the display device 1. The structure of the upper part of the display device 1 shown in FIG. 1 and the lower part close to the leg 30 of the display device 1 shown in FIG. As indicated by the arrows, the heat generated from the CCFL 5 etc. rises inside the display device 1 and accumulates in the upper portion. Therefore, the temperature of the metal bezel 9 is lower in the lower portion than in the upper portion of the display device 1. It is low.
このため、回路基板１０を表示装置１の下部に配置し、金属製ベゼル９の温度が比較的低い部分に接触させることより、駆動回路２０の放熱効率を高めることができる。 For this reason, the heat dissipation efficiency of the drive circuit 20 can be increased by disposing the circuit board 10 below the display device 1 and bringing it into contact with the portion of the metal bezel 9 where the temperature is relatively low.
図４は、本発明の実施例２に係る表示装置１の概略構成を示す断面図である。図4に示すように、実施例２の表示装置１は、回路基板１０の縁部でグランドパターン１５と凸部９ｃが接触するように構成されており、他の構成は実施例１と同じであるため、同じ符号を付記して詳細な説明は省略する。 FIG. 4 is a cross-sectional view illustrating a schematic configuration of the display device 1 according to the second embodiment of the invention. As shown in FIG. 4, the display device 1 according to the second embodiment is configured such that the ground pattern 15 and the convex portion 9c are in contact with each other at the edge portion of the circuit board 10, and the other configurations are the same as those of the first embodiment. Therefore, the same reference numerals are added and detailed description is omitted.
図５（ａ）は、図４に示した回路基板１０の平面図であり、図５（ｂ）は、Ａ−Ａ部の断面図である。図５に示すように、実施例２の表示装置１は、回路基板１０の縁部で信号端子１３と一緒に並設されていたダミー端子１４の個所に、グランドパターン１５を延設し、延設したグランドパターン１５に金属製ベゼル９の凸部９ｃを接触させている。 5A is a plan view of the circuit board 10 shown in FIG. 4, and FIG. 5B is a cross-sectional view taken along the line AA. As shown in FIG. 5, the display device 1 according to the second embodiment extends a ground pattern 15 to a portion of a dummy terminal 14 that is arranged in parallel with the signal terminal 13 at the edge of the circuit board 10. The protrusion 9c of the metal bezel 9 is brought into contact with the ground pattern 15 provided.
接続端子として通常使用されない予備のダミー端子１４の部分を、金属製ベゼル９の凸部９ｃの接触部として用いることにより、回路基板１０上の有効実装面積を減らすことなく、グランドパターン１５と凸部９ｃを接触させることができる。このため、駆動回路２０及びＳＯＦ１１の発熱を、熱伝導性の優れた金属材料で形成されたグランドパターン１５と凸部９ｃを伝熱させて、金属製ベゼル９の外側に放熱することができる。 By using a portion of the spare dummy terminal 14 that is not normally used as a connection terminal as a contact portion of the protrusion 9c of the metal bezel 9, the ground pattern 15 and the protrusion can be reduced without reducing the effective mounting area on the circuit board 10. 9c can be contacted. For this reason, the heat generated by the drive circuit 20 and the SOF 11 can be transferred to the outside of the metal bezel 9 by transferring the heat to the ground pattern 15 and the projections 9c formed of a metal material having excellent thermal conductivity.
また、グランドパターン１５が回路基板１０の縁部に延設され、その縁部に凸部９ｃを合わせるため、回路基板１０の中央部に配置される駆動回路２０は、凸部９ｃが当たって損壊する虞がなくなり、また、凸部９ｃの中央部には駆動回路２０を避ける凹部９ｄを設けなくて済み、凸部９ｃを容易に形成することができる。 In addition, since the ground pattern 15 is extended to the edge of the circuit board 10 and the protrusion 9c is aligned with the edge, the driving circuit 20 disposed at the center of the circuit board 10 is damaged by the protrusion 9c. In addition, there is no need to provide the concave portion 9d that avoids the drive circuit 20 at the center of the convex portion 9c, and the convex portion 9c can be easily formed.
図６（ａ）は、凸部９ｃの別の形状を示す平面図であり、図６（ｂ）は、Ａ−Ａ部における断面図である。図６に示す凸部９ｃは、グランドパターン１５と接触するとともに、信号端子１３上に接続されるＳＯＦ１１の上部にも当接するように形成されている。凸部９ｃが信号端子１３とＳＯＦ１１の上部に当接することにより、ＳＯＦ１１が信号端子１３から離れて接続不良が生じることがなくなり、接続部の信頼性を向上させることができる。また、凸部９ｃは１個の形成で済ませることができ、複数のグランドパターン１５と同時に接触させることができるので、凸部９ｃとグランドパターン１５との位置合わせと接触を容易に行なうことができる。 Fig.6 (a) is a top view which shows another shape of the convex part 9c, and FIG.6 (b) is sectional drawing in an AA part. The convex portion 9 c shown in FIG. 6 is formed so as to contact the ground pattern 15 and also contact the upper portion of the SOF 11 connected on the signal terminal 13. Since the convex portion 9c abuts on the signal terminal 13 and the upper portion of the SOF 11, the SOF 11 is not separated from the signal terminal 13 to cause connection failure, and the reliability of the connection portion can be improved. Further, the convex portion 9c can be formed by one, and can be brought into contact with the plurality of ground patterns 15 at the same time. Therefore, alignment and contact between the convex portions 9c and the ground pattern 15 can be easily performed. .
なお、図６（ｂ）に示すように、グランドパターン１５と信号端子１３及びＳＯＦ１１の位置では高さが異なり、段差が生じるため、凸部９ｃの高さを調整するか、凸部９ｃに段差を吸収する導電性の弾性部材１７を設けることが好ましい。 As shown in FIG. 6B, the height is different at the positions of the ground pattern 15, the signal terminal 13, and the SOF 11, and a step is generated. Therefore, the height of the convex portion 9c is adjusted or a step is formed on the convex portion 9c. It is preferable to provide a conductive elastic member 17 that absorbs water.
以上、本発明の実施形態について説明したが、本発明はこうした実施形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲において、種々なる態様で実施できることは勿論である。 As mentioned above, although embodiment of this invention was described, this invention is not limited to such embodiment at all, Of course, in the range which does not deviate from the summary of this invention, it can implement in a various aspect.
１ 表示装置
２ 表示パネル
３ バックライトユニット
４ バックライトシャーシ
５ ＣＣＦＬ
９ 金属製ベゼル
９ｃ 凸部
９ｄ 凹部
１０ 回路基板
１１ ＳＯＦ
１２ 配線
１３ 信号端子
１４ ダミー端子
１５ グランドパターン
１７ 導電性弾性部材
２０ 駆動回路
DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Display panel 3 Backlight unit 4 Backlight chassis 5 CCFL
9 Metal bezel 9c Convex part 9d Concave part 10 Circuit board 11 SOF
12 wiring 13 signal terminal 14 dummy terminal 15 ground pattern 17 conductive elastic member 20 drive circuit
Claims (5)
前記表示パネルの周縁部を外側から保持する金属製ベゼルと、
前記表示パネルを駆動する駆動回路と、
前記駆動回路を搭載する回路基板とを備えた表示装置であって、
前記回路基板は、表面にグランドパターンを有しており、
前記金属製ベゼルは、内面に凸部が設けられ、
前記凸部は、前記グランドパターンと接触されていることを特徴とする表示装置。 A display panel;
A metal bezel that holds the peripheral edge of the display panel from the outside;
A drive circuit for driving the display panel;
A display device comprising a circuit board on which the drive circuit is mounted,
The circuit board has a ground pattern on the surface,
The metal bezel is provided with a convex portion on the inner surface,
The display device, wherein the convex portion is in contact with the ground pattern.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011031820A JP2014081394A (en) | 2011-02-17 | 2011-02-17 | Display device |
| PCT/JP2012/053217 WO2012111584A1 (en) | 2011-02-17 | 2012-02-13 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011031820A JP2014081394A (en) | 2011-02-17 | 2011-02-17 | Display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2014081394A true JP2014081394A (en) | 2014-05-08 |
Family
ID=46672503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2011031820A Withdrawn JP2014081394A (en) | 2011-02-17 | 2011-02-17 | Display device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2014081394A (en) |
| WO (1) | WO2012111584A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016021061A (en) * | 2014-06-18 | 2016-02-04 | シャープ株式会社 | Frame, display device, and television receiver |
| JP2016224090A (en) * | 2015-05-27 | 2016-12-28 | 三菱電機株式会社 | Backlight and display |
| KR20170034040A (en) * | 2015-09-18 | 2017-03-28 | 엘지디스플레이 주식회사 | Display device |
| JP2019164225A (en) * | 2018-03-19 | 2019-09-26 | 株式会社リコー | Image projection device and mobile body |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6286838B2 (en) * | 2013-03-12 | 2018-03-07 | 三菱ケミカル株式会社 | Surface emitting module |
| CN103268029B (en) * | 2013-05-24 | 2015-11-25 | 深圳市华星光电技术有限公司 | A kind of display module and display |
| JP6872863B2 (en) * | 2016-07-13 | 2021-05-19 | パナソニック液晶ディスプレイ株式会社 | Display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06265922A (en) * | 1993-03-12 | 1994-09-22 | Hitachi Ltd | Liquid crystal display device |
| JPH06347761A (en) * | 1993-06-03 | 1994-12-22 | Hitachi Ltd | Liquid crystal display device |
| JPH09138389A (en) * | 1995-11-16 | 1997-05-27 | Hitachi Ltd | Liquid crystal display device |
-
2011
- 2011-02-17 JP JP2011031820A patent/JP2014081394A/en not_active Withdrawn
-
2012
- 2012-02-13 WO PCT/JP2012/053217 patent/WO2012111584A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016021061A (en) * | 2014-06-18 | 2016-02-04 | シャープ株式会社 | Frame, display device, and television receiver |
| JP2016224090A (en) * | 2015-05-27 | 2016-12-28 | 三菱電機株式会社 | Backlight and display |
| KR20170034040A (en) * | 2015-09-18 | 2017-03-28 | 엘지디스플레이 주식회사 | Display device |
| KR102351509B1 (en) * | 2015-09-18 | 2022-01-13 | 엘지디스플레이 주식회사 | Display device |
| JP2019164225A (en) * | 2018-03-19 | 2019-09-26 | 株式会社リコー | Image projection device and mobile body |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012111584A1 (en) | 2012-08-23 |
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