WO2014042212A1 - Structure d'ancrage de protection et dispositif d'affichage mince - Google Patents

Structure d'ancrage de protection et dispositif d'affichage mince Download PDF

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Publication number
WO2014042212A1
WO2014042212A1 PCT/JP2013/074686 JP2013074686W WO2014042212A1 WO 2014042212 A1 WO2014042212 A1 WO 2014042212A1 JP 2013074686 W JP2013074686 W JP 2013074686W WO 2014042212 A1 WO2014042212 A1 WO 2014042212A1
Authority
WO
WIPO (PCT)
Prior art keywords
shield
conductive cloth
shield plate
opening
gasket
Prior art date
Application number
PCT/JP2013/074686
Other languages
English (en)
Japanese (ja)
Inventor
則行 渋谷
好久 野口
良治 横井
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2014042212A1 publication Critical patent/WO2014042212A1/fr

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Classifications

    • 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
    • G02F1/133314—Back frames
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133334—Electromagnetic shields

Definitions

  • the present invention relates to a shield fixing structure and a thin display device having such a shield fixing structure.
  • the end of the shield plate varies from member to member, and is not necessarily in a stable and reliable state. Therefore, as shown in the fixing structure between the backlight shield 920 and the shield plate 930 in FIG. 1 and the cross-sectional shape of the fixing portion in FIG. 2, the operator uses the non-woven fabric 970 having conductivity and flexibility as the shield end 936. Hand-pasted in freehand. By using such a structure, it is possible to absorb the contact variation of the backlight shield 920 of the rigid member as well as the shield end portion 936 of the rigid member. That is, the electrical connection between the backlight shield 920 (backlight chassis) and the shield plate 930 is reliably maintained.
  • Patent Document 1 there is a disclosure regarding a direct fixing structure for fixing the shield plate and the backlight chassis, but there is no disclosure about the technique for interposing the nonwoven fabric, and another technique is required. It was.
  • the present invention has been made in view of the above situation, and an object thereof is to provide a technique for solving the above problems.
  • the shield fixing structure of the present invention is provided on a metal plate having a shielding function, and is a fixing part fixed to a fixed member, and a cloth-like or sheet-like shape arranged between the fixing part and the fixing member.
  • a conductive member, the conductive member has a locking opening
  • the fixing member has a locking portion that locks with the locking opening of the conductive member.
  • a concave shape is formed on the back surface side of the fixed portion, and when the conductive member is disposed, a space surrounded by the concave shape and the conductive member is a shield plate. The inside and outside may be communicated.
  • a plurality of openings may be formed in a region where the conductive member is disposed.
  • the thin display device of the present invention has the above-described shield fixing structure. Further, the size of the display panel may be 80 inches or more.
  • the present invention it is possible to easily position the conductive nonwoven fabric to be attached to the shield plate and provide a technique for improving the pasting accuracy.
  • FIG. 18 is a front view of the liquid crystal television 10 according to the present embodiment.
  • FIG. 19 is an exploded perspective view seen from the back side of the liquid crystal television 10.
  • the liquid crystal television 10 has a front outer peripheral portion of a display panel 11 covered with a frame-shaped front cabinet 12.
  • the rear side of the display panel 11 is covered with a rear cabinet 13.
  • the back surface of the display panel 11 is a backlight chassis (backlight shield 20).
  • FIG. 3 is a view showing a fixing structure between the backlight shield 20 and the shield plate 30. This fixing structure is provided in a thin display device such as the liquid crystal television 10.
  • FIG. 4 is a perspective view of the shield plate 30.
  • the shield plate 30 is a part obtained by processing a metal or other conductive member into a sheet metal.
  • the shield end portion 36 of the shield plate 30 is formed on a plane, and is in contact with and fixed to the backlight shield 20. That is, the shield end portion 36 functions as a fixing portion for the backlight shield 20 that is a fixed member.
  • a conductive cloth 70 is provided between the backlight shield 20 and the shield end 36.
  • the shield end portion 36 of the shield plate 30 is formed with a protruding portion 40 extending outward from the approximate center in the width direction (vertical direction in FIG. 3).
  • the protrusion 40 has a key-shaped restricting portion 42 whose tip is bent in the vertical direction.
  • FIG. 5 is a view showing the conductive cloth 70.
  • a conductive cloth 970 having a simple rectangular shape has been used as shown in FIG.
  • the conductive cloth 70 of the present embodiment is not a mere rectangular shape, but has a frame-like locking portion 74 extending laterally from one side surface at a substantially central portion in the longitudinal direction (vertical direction in the drawing). Is formed.
  • the inside of the frame portion of the locking portion 74 is a locking opening 76 that locks to the protrusion 40 provided on the shield plate 30.
  • double-sided tape 78 is attached to both end portions and the center portion of the cloth main body 72.
  • a conductive member such as a conductive sheet or a conductive gasket may be used.
  • FIG. 6A is a plan view (top view) showing the shield plate 30 and the conductive cloth 70 before fixing
  • FIG. 6B shows a side view
  • FIG. 7A is a plan view (top view) showing the shield plate 30 and the conductive cloth 70 after being fixed
  • FIG. 7B is a side view
  • 8 shows the shield end portion 36 and the conductive cloth 70 after being fixed
  • FIG. 8A is a view showing the front surface (end surface 36a) side
  • FIG. It is the figure which showed the edge part back surface 36b) side.
  • the worker holds the conductive cloth 70 and inserts the protruding portion 40 of the shield plate 30 so as to be hooked on the locking opening 76 of the conductive cloth 70. Then, the operator attaches the central portion of the cloth main body 72 to the root portion of the protruding portion 40 of the end back surface 36b with the central double-sided tape 78. At this time, proper positioning is facilitated by the presence of the restricting portion 42.
  • the surface of the conductive cloth 70 is aligned with the end back surface 36b of the shield end 36, and the double-sided tape 78 at both ends is attached to the end back surface 36b.
  • the double-sided tape 78 at both ends is attached to the end back surface 36b.
  • three marks 38 for positioning are formed in a slightly convex shape at each end.
  • a circular confirmation opening 39 is formed at the center thereof. Both ends of the conductive cloth 70 are attached with a double-sided tape 78 so as to cover the confirmation opening 39 with the mark 38 as a positioning mark. Then, it can be determined whether the conductive cloth 70 is properly fixed by the confirmation opening 39.
  • the presence of the mark 38 and the confirmation opening 39 prevents the end portion from being displaced. Furthermore, the confirmation opening 39 can surely confirm the attachment of the conductive cloth 70. In addition, since the protrusions 40 can be locked, it is not necessary to provide the double-sided tape 78 on the entire surface of the conductive cloth 70. Or even if it is provided on the entire surface, it is not necessary to increase the adhesive strength of the double-sided tape 78.
  • the conductive cloth 70 is dropped from between the shield plate 30 and the backlight shield 20 because the locking opening 76 is locked to the protrusion 40. Can be prevented.
  • the size of the liquid crystal television 10 has been increased, and products having a screen size of 80 inches have been put on the market.
  • Such a large-sized liquid crystal television 10 is easily bent due to the large size of various components. Since such a deflection is small in the conventional size, it is not necessary to consider the dropping of the conductive cloth 70.
  • the bending force of the conductive cloth 70 between the backlight shield 20 and the shield plate 30 decreases when the adhesive force decreases due to such bending. Accordingly, by adopting a locking structure such as appropriate fixing of the conductive cloth 70, in particular, fixing of the protrusion 40 and the locking opening 76, it is possible to effectively prevent the dropout.
  • FIG. 9 is a view showing the shield plate 130 and the conductive cloth 70 before fixing according to the present embodiment.
  • FIG. 10 is a view showing the shield plate 130 and the conductive cloth 70 after being fixed. The point that the conductive cloth 70 is attached to the end back surface 136b is the same. Here, the points different from the first embodiment are shown and described.
  • a plurality of openings 150 are formed in a portion where the conductive cloth 70 of the shield end 136 is attached.
  • eight openings 150 are formed in a row in each of an upper portion and a lower portion as shown in the figure from the region where the protrusion 140 (the restricting portion 142) is formed.
  • the position where the opening 150 is formed is a position unrelated to the adhesion of the double-sided tape 78 of the conductive cloth 70.
  • the confirmation opening 39 of the first embodiment is omitted.
  • the present embodiment it is possible to realize the weight reduction by providing the opening 150 together with the same effect as the first embodiment.
  • the shape, number, size, and the like of the opening 150 can be selected as appropriate.
  • FIG. 11 is a view showing the shield plate 230 and the conductive cloth 270 before fixing according to the present embodiment.
  • 12 is a view showing the shield plate 230 and the conductive cloth 270 after being fixed,
  • FIG. 12 (a) is a plan view, and
  • FIG. 12 (b) is a cross-sectional view taken along line A1-A1 of FIG. 12 (a).
  • FIG. This embodiment is a further modification of the second embodiment, and here, mainly different points will be illustrated and described.
  • an insertion opening 255 is formed in the vicinity of the positioning mark 238 of the shield end 236, more specifically at a position closer to the center in the width direction.
  • the end 279 of the conductive cloth 270 is inserted from the end back surface 236b side to the end surface 236a side. That is, both end portions 279 of the conductive cloth 270 are disposed on the end surface 236a.
  • the conductive cloth 270 includes a locking portion 274, a locking opening 276, and a double-sided tape 278 at the center in the width direction.
  • the double-sided tape 278 in the vicinity of the end portion 279 of the cloth main body 272 does not need a portion that protrudes to the end surface 236a. It is provided on the (regulator 242) side.
  • the conductive cloth 270 can be fixed more reliably.
  • a double-sided tape 278 may be provided on the back side of the end portion 279 and fixed to the end surface 236a.
  • FIG. 13 is a perspective view of the shield plate 330 of the present embodiment.
  • FIG. 14 is a view showing the shield plate 330 and the conductive cloth 70 before fixing
  • FIG. 14 (a) is a plan view
  • FIG. 14 (b) is a side view
  • 15 is a view showing the shield plate 330 and the conductive cloth 70 after being fixed
  • FIG. 15 (a) is a plan view
  • FIG. 15 (b) is a side view.
  • a drawn portion 350 in which a portion of the shield end portion 336 where the double-sided tape 78 is not attached is convex toward the end surface 336a by drawing. That is, it is formed in a concave shape when viewed from the end rear surface 336b side.
  • a ventilation opening 360 is formed at a boundary portion between the shield end 336 and the shield wall surface 338 bent perpendicularly thereto.
  • the ventilation opening 360 is formed at a position corresponding to at least a portion where the throttle part 350 is formed.
  • the inside and outside of the shield plate 330 can effectively dissipate heat from the board (components) disposed inside the shield plate 330 by the ventilation openings 360 and the vents 358. Moreover, since the temperature rise of the area
  • the thickness of the liquid crystal television 10 is at a level where there is substantially no difference due to the progress of thinning technology. That is, as the panel size increases, distortion tends to occur due to the structure. Moreover, it is not realistic to add a reinforcing frame from the viewpoint of weight reduction and thickness reduction. In this state, the backlight shield 20 and the shield plate 30 may be unstable. According to the first to fourth embodiments, a certain effect with respect to fixing stability was obtained. However, in both the backlight shield 20 and the shield plate 30, when the error upper limit is reached, instability may become significant. This can be avoided if the tolerance is set strictly, but it may be difficult from a cost standpoint. For this reason, in the manufacturing process, work efficiency may be reduced in order to ensure reliable fixation. Such a problem has been raised from the manufacturing site from the 60-inch class, and in the 80-inch class, there has been a strong demand for countermeasure technology. Therefore, in the embodiment described below, the gasket 470 is used as the conductive member.
  • FIG. 16 is a perspective view of the shield plate 430 of the present embodiment.
  • 16A shows the shield plate 430 before the gasket 470 is fixed
  • FIG. 16B shows the shield plate 430 after the gasket 470 is fixed.
  • a configuration using a gasket 470 as a conductive member is illustrated. Since the basic configuration of the shield plate 430 is the same, differences will be mainly described.
  • a gasket 470 is disposed at a shield end 436 that bends and extends perpendicularly from the shield wall 438 instead of the conductive cloth 70 and the like.
  • the shield end 436 is configured by a three-part configuration, that is, a central shield end center 436A and two shield end sides 436B on both sides.
  • the shield end center 436A is formed at a position offset by a predetermined amount from the shield end side 436B to the lower side in the figure. Therefore, the predetermined amount of gap is formed at the boundary portion between the shield end portion center 436A and the shield end portion side 436B.
  • each shield end side 436B At the center of each shield end side 436B, a locking piece 460 that is punched out by sheet metal processing or the like and bent downward is formed.
  • a protrusion 440 having a predetermined width that is bent upward is formed at the center extending outer edge of the shield end center 436A.
  • the protrusion 440 functions as a restriction wall that abuts against the side wall of the gasket 470 and restricts movement.
  • the gasket 470 has a plate shape (a rectangular parallelepiped) as illustrated.
  • the length is substantially the same as the length of the shield end 436.
  • the width of the gasket 470 is set to be narrower than the width of the shield end portion 436 (the amount of extension from the shield wall portion 438).
  • the thickness of the gasket 470 is substantially the same as the gap (predetermined amount) between the shield end portion center 436A and the shield end portion side 436B.
  • a locking opening 476 penetrating vertically is formed at a position corresponding to the locking piece 460 described above.
  • the central portion of the gasket 470 is placed on the shield end center 436A, and both end portions are submerged under the shield end side 436B. At this time, the locking piece 460 is fitted into the locking opening 476 and positioning is performed.
  • the gasket 470 has higher rigidity than the conductive cloth, and when placed on the shield plate 430, the shape of the shield plate 430 is easily stabilized. That is, distortion can be reduced, and design errors can be set easily. As a result, it becomes easy to ensure the stability of fixing between the shield plate 430 and the gasket 470, and the workability at the time of manufacture is improved. In particular, from the viewpoint of improving workability, it becomes remarkable when the panel size is 80 inches or more.
  • FIG. 17 is a perspective view of the shield plate 530 of the present embodiment.
  • FIG. 17A shows the shield plate 530 before the gasket 570 is fixed
  • FIG. 17B shows the shield plate 530 after the gasket 570 is fixed.
  • the gasket 570 has a certain rigidity. Unlike the conductive cloth 70, the shape is not deformed unless an external force is applied. Therefore, the extension amount of the shield end portion center 536A extending from the shield wall portion 538 is approximately halved. The protrusion 540 is engaged with an engagement opening 576 formed at the center of the gasket 570.
  • two regulating pieces 560 for locking the movement of the gasket 570 are formed at both ends of the shield end side 536B.
  • the gasket 570 is in contact with both sides of the gasket 570.

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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)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

L'invention concerne une technologie, grâce à laquelle un tissu non tissu électroconducteur, fixé sur une plaque de protection, peut être positionné facilement et qui permet d'améliorer la précision de fixation. Un ouvrier tient un tissu électroconducteur (70) et insère une partie en saillie (40) d'une plaque de protection (30), de sorte que la partie en saillie soit piégée par un trou d'engagement (76) du tissu électroconducteur (70). Ensuite, l'ouvrier fixe la partie centrale du corps principal (72) du tissu à la partie de base de la partie en saillie (40) d'une surface arrière (36b) de partie d'extrémité, par le biais d'un ruban double face au centre du corps principal du tissu. A ce moment, le positionnement peut être réalisé correctement, grâce à l'existence d'une partie de régulation (42). Ensuite, la surface du tissu électroconducteur (70) est alignée avec la surface arrière (36b) de partie d'extrémité de la partie d'extrémité de protection (36) et le ruban double face sur les deux extrémités de celle-ci est fixé sur la surface arrière (36b) de partie d'extrémité.
PCT/JP2013/074686 2012-09-14 2013-09-12 Structure d'ancrage de protection et dispositif d'affichage mince WO2014042212A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2012202546 2012-09-14
JP2012-202546 2012-09-14
JP2013164973 2013-08-08
JP2013-164973 2013-08-08
JP2013-188074 2013-09-11
JP2013188074A JP2015053460A (ja) 2012-09-14 2013-09-11 シールド固定構造及び薄型表示装置

Publications (1)

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WO2014042212A1 true WO2014042212A1 (fr) 2014-03-20

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PCT/JP2013/074686 WO2014042212A1 (fr) 2012-09-14 2013-09-12 Structure d'ancrage de protection et dispositif d'affichage mince

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WO (1) WO2014042212A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06291485A (ja) * 1993-04-06 1994-10-18 Fuji Xerox Co Ltd 電波ノイズの放射防止装置
JP2003258479A (ja) * 2002-03-06 2003-09-12 Mashiko:Kk フィンガーレール及びシールドフィンガーの係止方法
JP2005150499A (ja) * 2003-11-18 2005-06-09 Funai Electric Co Ltd 箱形機器のシールド装置
JP2008182490A (ja) * 2007-01-24 2008-08-07 Nec Saitama Ltd 電子機器における機能ユニットの接地構造、電子機器の組立方法及び電子機器
JP2011210825A (ja) * 2010-03-29 2011-10-20 Gunze Ltd 電磁波シールド材およびそれを装着してなるプラズマディスプレイパネル

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06291485A (ja) * 1993-04-06 1994-10-18 Fuji Xerox Co Ltd 電波ノイズの放射防止装置
JP2003258479A (ja) * 2002-03-06 2003-09-12 Mashiko:Kk フィンガーレール及びシールドフィンガーの係止方法
JP2005150499A (ja) * 2003-11-18 2005-06-09 Funai Electric Co Ltd 箱形機器のシールド装置
JP2008182490A (ja) * 2007-01-24 2008-08-07 Nec Saitama Ltd 電子機器における機能ユニットの接地構造、電子機器の組立方法及び電子機器
JP2011210825A (ja) * 2010-03-29 2011-10-20 Gunze Ltd 電磁波シールド材およびそれを装着してなるプラズマディスプレイパネル

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