JP2008090094A - Backlight device - Google Patents

Backlight device Download PDF

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JP2008090094A
JP2008090094A JP2006272446A JP2006272446A JP2008090094A JP 2008090094 A JP2008090094 A JP 2008090094A JP 2006272446 A JP2006272446 A JP 2006272446A JP 2006272446 A JP2006272446 A JP 2006272446A JP 2008090094 A JP2008090094 A JP 2008090094A
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diffusion plate
backlight
lateral width
protrusion
locking holes
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JP2006272446A
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Japanese (ja)
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Masaki Shimizu
将樹 清水
Mitsuhiro Moriyasu
光弘 森保
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Sharp Corp
シャープ株式会社
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Priority to JP2006272446A priority Critical patent/JP2008090094A/en
Publication of JP2008090094A publication Critical patent/JP2008090094A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To cause neither generation of a vibration sound from a lock hole of a diffusion plate of a backlight device nor rubbing even in a vibration environment, to eliminate damage to an optical sheet, and to adapt the backlight device to thermal expansion of the diffusion plate. <P>SOLUTION: The backlight device wherein while a fluorescent tube 3 as a light source is disposed in a shallow-bottom box-shaped housing 1 supported in a vertical direction, projections 6 to 8 are formed above the front of the housing 1 on the same horizontal straight line and the diffusion plate 4 is locked to the projections 6 to 8 is characterized in that a center lock hole 17 among lock holes 16 to 18 formed in the diffusion plate 4 is made nearly equal in lateral width to the projection 7 inserted into the lock hole 17, and the left and right lock holes 16 and 18 are made larger in lateral width than the projections 6 and 8 inserted into the lock holes 16 and 18. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、液晶テレビ等の光源として用いられるバックライト装置に関し、詳しくはバックライト装置を構成する拡散板をリヤシャーシに突設した突起に係止する支持構造において、拡散板に形成された係止孔のガタを少なくすることにより、振動環境下で係止孔のガタのために発生していた振動音やコスレによる微粉末を解消するようにしたバックライト装置に関する。   The present invention relates to a backlight device used as a light source for a liquid crystal television or the like, and more particularly, to a support structure in which a diffusion plate constituting the backlight device is locked to a protrusion protruding from a rear chassis, and the engagement formed on the diffusion plate. The present invention relates to a backlight device that eliminates vibration noise and fine powder due to rusting that are generated due to backlash of a locking hole in a vibration environment by reducing backlash of a stophole.
従来、液晶テレビ等の液晶表示装置に用いられるバックライト装置は、光源である蛍光ランプの前方にアクリル板等からなる拡散板を配置しその前面にITOシート、拡散フィルム、プリズムシート、反射偏光フィルム等の光学シートが配置されている。特に、バックライト装置の照射面が垂直に支持される場合は、拡散板の上端部が当接するリヤシャーシの当接面の2箇所または3箇所に突起を突設して、同様に上端部に孔を形成した拡散板、各光学シートをその突起に係止し、拡散板、光学シートをその自重で吊り下げた状態で保持していた。   Conventionally, a backlight device used for a liquid crystal display device such as a liquid crystal television has a diffusion plate made of an acrylic plate or the like disposed in front of a fluorescent lamp as a light source, and an ITO sheet, a diffusion film, a prism sheet, a reflective polarizing film in front of the diffusion plate. An optical sheet such as is arranged. In particular, when the irradiation surface of the backlight device is supported vertically, protrusions are projected at two or three positions on the abutting surface of the rear chassis where the upper end of the diffuser plate abuts, and the upper end is similarly formed. The diffuser plate and the optical sheet in which the holes were formed were locked to the projections, and the diffuser plate and the optical sheet were held suspended by their own weight.
その一例として、特許文献1に記載のバックライト装置がある。このバックライト装置では、拡散板に形成された係止孔が、係止される突起よりも遊びのある大きさに形成されていた。この遊びを設けたことで、バックライト装置が点灯されて拡散板の周囲の雰囲気温度が上昇して、拡散板がリヤシャーシに対して相対的に膨張しても係止されている突起に当接して過大な荷重が発生することが回避されて、拡散板は自由に膨張収縮することが可能となる。
特開2003−215585号公報
As an example, there is a backlight device described in Patent Document 1. In this backlight device, the locking hole formed in the diffusion plate is formed to have a size that is more playful than the projection to be locked. By providing this play, the backlight device is turned on, the ambient temperature around the diffusion plate rises, and even if the diffusion plate expands relative to the rear chassis, it contacts the projections that are locked. It is possible to avoid excessive load from coming into contact, and the diffusion plate can freely expand and contract.
JP 2003-215585 A
しかしながら、上述したように、突起が係止される拡散板の係止孔に充分な遊びを設けておくと、輸送中等の振動環境下では、突起が拡散板の係止孔の内壁に繰り返し接触して振動音を発生したり、コスレにより拡散板から白色の微粉末が発生して周囲に飛散たり、拡散板の前面に配置されている光学シートに傷をつけたりする等の問題が発生することがあった。そこで、本発明は、振動環境下であっても、拡散板の係止孔から振動音やコスレが発生することなく、また、光学シートを傷つけることなく、さらには、拡散板の熱膨張にも対応可能にした拡散板の係止孔を備えたバックライト装置を提案することを目的とした。   However, as described above, if sufficient play is provided in the locking hole of the diffusion plate to which the protrusion is locked, the protrusion repeatedly contacts the inner wall of the locking hole of the diffusion plate in a vibration environment such as during transportation. This causes problems such as vibration noise, white powder generated from the diffuser plate due to cosmetics, and scattering around it, or scratching the optical sheet placed in front of the diffuser plate. was there. Therefore, the present invention does not generate vibration noise or blur from the locking holes of the diffusion plate even in a vibration environment, does not damage the optical sheet, and further does not cause thermal expansion of the diffusion plate. An object of the present invention is to propose a backlight device having a diffusion plate locking hole which can be used.
上記課題を解決するために、本発明は、垂直方向に支持された浅底の箱状筐体の内部に光源を配置するとともに、前記筐体の前面上部に2個以上の突起を突設して該突起に拡散板を係止したバックライト装置において、前記拡散板に形成された2個以上の係止孔のうち1個の横幅を前記突起の横幅と略同一にするとともに、他の係止孔の横幅を前記突起の横幅よりも大きくする。   In order to solve the above-mentioned problems, the present invention has a light source disposed inside a shallow box-shaped housing supported in a vertical direction, and two or more protrusions projecting from the front upper portion of the housing. In the backlight device in which the diffusing plate is locked to the protrusion, one of the two or more locking holes formed in the diffusing plate has a lateral width substantially the same as the lateral width of the protrusion, and The lateral width of the stop hole is made larger than the lateral width of the protrusion.
詳しくは、垂直方向に支持された浅底の箱状筐体の内部に光源を配置するとともに、前記筐体の前面上部に水平方向同一直線上に2個以上の突起を突設して該突起に拡散板を係止したバックライト装置において、前記拡散板に形成された2個以上の係止孔のうち1個の横幅を該係止孔に挿通される突起の横幅と略同一にするとともに、他の係止孔の横幅を該係止孔に挿入される前記突起の横幅よりも大きくする。ここで、前記係止孔のそれぞれの高さを該係止孔に挿入される前記突起のそれぞれの高さと略同一にすることが好ましい。   Specifically, a light source is arranged inside a shallow box-shaped housing supported in a vertical direction, and two or more protrusions are provided on the front upper portion of the housing on the same horizontal line so as to project the protrusions. In the backlight device in which the diffusion plate is locked, the horizontal width of one of the two or more locking holes formed in the diffusion plate is made substantially the same as the horizontal width of the protrusion inserted through the locking hole. The lateral widths of the other locking holes are made larger than the lateral widths of the protrusions inserted into the locking holes. Here, it is preferable that the height of each of the locking holes is substantially the same as the height of each of the protrusions inserted into the locking holes.
以上述べたように本発明によれば、拡散板に形成された2個以上の係止孔のうち1個の横幅を突起の横幅と略同一にするとともに、他の係止孔の横幅を突起の横幅よりも大きくしたことで、拡散板が突起に係止されている状態では、遊びがないため振動が加えられてもキズやコスレを発生したり光学シートを傷つけることが解消され、また、バックライト装置の点灯中に加熱されて拡散板が膨張しても、突起の横幅よりも幅の広い係止孔の部分で膨張分が吸収されて支障がない。   As described above, according to the present invention, the lateral width of one of the two or more locking holes formed in the diffusion plate is made substantially the same as the lateral width of the projection, and the lateral width of the other locking holes is projected. Because it is larger than the width of the, the diffuser plate is locked to the protrusion, so there is no play, so it is possible to eliminate scratches and scrapes and damage the optical sheet even if vibration is applied, Even if the diffusion plate is heated and heated while the backlight device is turned on, the expansion is absorbed by the portion of the locking hole wider than the lateral width of the protrusion, and there is no problem.
以下、図に基づいて本発明の実施形態を説明する。
図1は本発明に係るバックライト装置の実施形態を示し、図(a)は縦断側面図であり、図(b)は図(a)における拡散板の係合状態を示す正面図である。図2は図1に示したバックライト装置における拡散板の係合を示す分解斜視図である。図1において、1は浅底の箱形状をした筐体であり、その内側に反射板2が取り付けられ、反射板2の前方に光源である複数の蛍光管3が等間隔で配置されている。筐体1の外周前面には、拡散板4が当接される当接凹部5が形成されている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of a backlight device according to the present invention, FIG. 1 (a) is a longitudinal side view, and FIG. 1 (b) is a front view showing an engaged state of a diffusion plate in FIG. 1 (a). FIG. 2 is an exploded perspective view showing engagement of the diffusion plate in the backlight device shown in FIG. In FIG. 1, reference numeral 1 denotes a shallow box-shaped housing, a reflecting plate 2 is attached to the inside thereof, and a plurality of fluorescent tubes 3 as light sources are arranged at equal intervals in front of the reflecting plate 2. . On the front surface of the outer periphery of the housing 1, an abutting recess 5 with which the diffusion plate 4 abuts is formed.
当接凹部5の上部には、左端、中央、右端に断面長方形で同一寸法の突起6〜8が突設されている。これら突起6〜8に対応する拡散板4の上端部には、係止孔16〜18が形成されている。中央の突起7が係合される係止孔17は、突起7が係合されている状態で左右側と下側に僅かな隙間を有する長方形に形成されている。左端の突起6が係合される係止孔16は、突起6が係合されている状態で左側と下側に僅かな隙間を有し右側にはやや大きめの隙間を有する長方形に形成されている。同様に、右端の突起8が係合される係止孔18は、突起8が係合されている状態で右側と下側に僅かな隙間を有し左側にはやや大きめの隙間を有する長方形に形成されている。   On the upper part of the contact recess 5, protrusions 6 to 8 having a rectangular cross section and having the same dimensions are provided at the left end, the center, and the right end. Locking holes 16 to 18 are formed in the upper end portion of the diffusion plate 4 corresponding to the protrusions 6 to 8. The locking hole 17 with which the central protrusion 7 is engaged is formed in a rectangular shape having a slight gap between the left and right sides and the lower side when the protrusion 7 is engaged. The locking hole 16 with which the left end protrusion 6 is engaged is formed in a rectangular shape having a slight gap on the left and lower sides and a slightly larger gap on the right side when the protrusion 6 is engaged. Yes. Similarly, the locking hole 18 with which the right end protrusion 8 is engaged has a rectangular shape with a slight gap on the right and lower sides and a slightly larger gap on the left side with the protrusion 8 engaged. Is formed.
また、拡散板4の次に突起6〜8に係止される3枚からなる光学シート9についても、図示しないが、拡散板4と同様に上端に係止孔が形成されている。拡散板4は、組立の際には、中央の係止孔17を突起7に最初に係合させるようにしながら、突起6〜8に係止孔16〜18を挿入するようにして組み立てられる。次に光学シート9についても同様の手順で組み込まれる。このようにして組み立てられた拡散板4は、中央の突起7に対して係止孔17が上下方向、左右方向とも略遊びのない状態であるからガタが発生することなくなり、従来、振動環境下で発生していたガタによるコスレ、キズ等が解消される。   Further, although not shown, the three optical sheets 9 that are locked to the protrusions 6 to 8 next to the diffusion plate 4 are also formed with locking holes at the upper ends, as in the case of the diffusion plate 4. The diffusing plate 4 is assembled by inserting the locking holes 16 to 18 into the protrusions 6 to 8 while first engaging the central locking hole 17 with the protrusion 7 at the time of assembly. Next, the optical sheet 9 is incorporated in the same procedure. In the diffuser plate 4 assembled in this way, the locking hole 17 is substantially free from play in both the vertical and horizontal directions with respect to the central protrusion 7, so that no play is generated. The looseness, scratches, etc. caused by looseness that occurred in
また、このように構成されたバックライト装置では、点灯されて蛍光管3が発熱して 拡散板4の周囲の空気温度が上昇すると、拡散板4も熱膨張を開始する。このとき、拡散板4は、中央の係止孔17により位置決めされているため、左右の係止孔16,18がそれぞれ左方向、右方向に移動するように膨張する。ここで、左方向へ移動する係止孔16には、突起6の右側に余裕があり、右方向へ移動する係止孔18には、突起8の左側に余裕があるため、左右の係止孔16,18が突起6,8に当接して過大な荷重が発生することは回避される。   Further, in the backlight device configured as described above, when the fluorescent tube 3 is turned on to generate heat and the air temperature around the diffusion plate 4 rises, the diffusion plate 4 also starts thermal expansion. At this time, since the diffusion plate 4 is positioned by the central locking hole 17, the left and right locking holes 16, 18 expand so as to move in the left direction and the right direction, respectively. Here, the locking hole 16 that moves to the left has a margin on the right side of the projection 6, and the locking hole 18 that moves to the right has a margin on the left side of the projection 8. It is avoided that the holes 16 and 18 come into contact with the protrusions 6 and 8 and an excessive load is generated.
なお、上述の実施形態では、突起6〜8に対する係止孔16〜18の上下方向の遊びを説明のため大きめに図示しているが、実際は僅かなものである。また、上述の実施形態では、中央の突起7と係止孔17を基準にしたが、左右の突起6,8および係止孔16,18を基準にすることも可能である。また、上述の実施形態では、互いに同一寸法の突起を基準にして、係止孔を大きくしたが、突起と係止孔の関係は相対的なものであるから、係止孔を互いに同一寸法にして突起の横幅を変えるようにしても良い。   In the above-described embodiment, the vertical play of the locking holes 16 to 18 with respect to the protrusions 6 to 8 is illustrated to be large for the sake of explanation, but it is actually a slight amount. In the above-described embodiment, the center projection 7 and the locking hole 17 are used as a reference. However, the left and right projections 6 and 8 and the locking holes 16 and 18 can be used as a reference. Further, in the above-described embodiment, the locking holes are enlarged with reference to the protrusions having the same dimensions as each other. However, since the relationship between the protrusions and the locking holes is relative, the locking holes are made to have the same dimensions. The width of the protrusion may be changed.
また、上述の実施形態では、突起と係止孔がそれぞれ3個の場合について説明したが、2個の場合または4個以上の2次元平面に配置される場合も、同様に適用可能であり、1個の突起と係止孔を基準にして他の突起と係止孔に余裕を持たせる構成とするものである。また、上述の実施形態では、突起と係止孔のそれぞれの形状を長方形としたが円形や正方形の場合も同様に適用可能である。   Moreover, in the above-described embodiment, the case where there are three protrusions and three locking holes has been described, but the case where there are two or four or more two-dimensional planes can be similarly applied. One projection and the locking hole are used as a reference, and another projection and the locking hole are provided with a margin. Moreover, in the above-mentioned embodiment, although each shape of the protrusion and the locking hole is a rectangle, it can be similarly applied to a case of a circle or a square.
本発明は、バックライト装置以外には、温度が変動する雰囲気中に拡散板等の板状部品を支持する構造を有する他の光学機器、装置に利用可能である。   The present invention can be used for other optical devices and apparatuses having a structure for supporting a plate-like component such as a diffusion plate in an atmosphere where the temperature varies, in addition to the backlight device.
本発明に係るバックライト装置の実施形態を示す縦断側面図および正面図である。It is the vertical side view and front view which show embodiment of the backlight apparatus which concerns on this invention. 図1のバックライト装置における拡散板の係合を示す分解斜視図である。It is a disassembled perspective view which shows engagement of the diffusion plate in the backlight apparatus of FIG.
符号の説明Explanation of symbols
1 筐体
2 反射板
3 蛍光管
4 拡散板
5 当接凹部
6〜8 突起
9 光学シート
16〜18 係止孔
DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Reflecting plate 3 Fluorescent tube 4 Diffusion plate 5 Contact recessed part 6-8 Protrusion 9 Optical sheet 16-18 Locking hole

Claims (3)

  1. 垂直方向に支持された浅底の箱状筐体の内部に光源を配置するとともに、前記筐体の前面上部に2個以上の突起を突設して該突起に拡散板を係止したバックライト装置において、
    前記拡散板に形成された2個以上の係止孔のうち1個の横幅を前記突起の横幅と略同一にするとともに、他の係止孔の横幅を前記突起の横幅よりも大きくしたことを特徴とするバックライト装置。
    A backlight in which a light source is arranged inside a shallow box-shaped housing supported in a vertical direction, and two or more protrusions are provided on the front upper portion of the casing, and a diffusion plate is locked to the protrusions. In the device
    The lateral width of one of the two or more locking holes formed in the diffusion plate is made substantially the same as the lateral width of the projection, and the lateral width of the other locking holes is made larger than the lateral width of the projection. Backlight device characterized.
  2. 垂直方向に支持された浅底の箱状筐体の内部に光源を配置するとともに、前記筐体の前面上部に水平方向同一直線上に2個以上の突起を突設して該突起に拡散板を係止したバックライト装置において、
    前記拡散板に形成された2個以上の係止孔のうち1個の横幅を該係止孔に挿通される突起の横幅と略同一にするとともに、他の係止孔の横幅を該係止孔に挿入される突起の横幅よりも大きくしたことを特徴とするバックライト装置。
    A light source is arranged inside a shallow box-shaped housing supported in the vertical direction, and two or more protrusions are provided on the front surface of the housing on the same straight line in the horizontal direction, and a diffusion plate is provided on the protrusion. In the backlight device that locked
    The lateral width of one of the two or more locking holes formed in the diffusion plate is made substantially the same as the lateral width of the protrusion inserted into the locking hole, and the lateral width of the other locking holes is A backlight device characterized in that it is larger than the lateral width of the protrusion inserted into the hole.
  3. 請求項1または2に記載のバックライト装置において、
    前記係止孔のそれぞれの高さを該係止孔に挿入される前記突起のそれぞれの高さと略同一にしたことを特徴とするバックライト装置。
    The backlight device according to claim 1 or 2,
    The backlight device characterized in that the height of each of the locking holes is substantially the same as the height of each of the projections inserted into the locking holes.
JP2006272446A 2006-10-04 2006-10-04 Backlight device Pending JP2008090094A (en)

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US8215784B2 (en) 2009-08-20 2012-07-10 Nlt Technologies, Ltd. Backlight device
WO2015075834A1 (en) * 2013-11-25 2015-05-28 堺ディスプレイプロダクト株式会社 Optical sheet holding structure and display device

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