JP2007033962A - Liquid crystal display - Google Patents

Liquid crystal display Download PDF

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JP2007033962A
JP2007033962A JP2005218336A JP2005218336A JP2007033962A JP 2007033962 A JP2007033962 A JP 2007033962A JP 2005218336 A JP2005218336 A JP 2005218336A JP 2005218336 A JP2005218336 A JP 2005218336A JP 2007033962 A JP2007033962 A JP 2007033962A
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liquid crystal
crystal display
display panel
spherical
diffusion plate
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JP4659550B2 (en
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Mitsuo Nakayama
三男 中山
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Sharp Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a means for preventing the problem that a center part of an optical diffusion plate is bent in a spherical shape to the side of a liquid crystal display panel by thermal expansion, an optical sheet set of a soft member disposed between the optical diffusion plate and the liquid crystal display panel is pushed to the liquid crystal display panel side and abuts on the liquid crystal display panel and thereby [a Newton ring] is generated in a display image and display quality is reduced. <P>SOLUTION: In a liquid crystal display provided with the liquid crystal display panel 2, the optical diffusion plate disposed on the rear surface of the liquid crystal display panel 2 and a backlight unit for performing irradiation with light from the rear surface of the liquid crystal display panel 2, the optical diffusion plate is formed in a spherical shape which is curved to the backlight unit side in a projecting shape and a gap is provided between tip parts of supporting columns whose heights are changed along the spherical shape of the spherical optical diffusion plate 12 and the rear surface of the spherical optical diffusion plate 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、液晶表示パネルを表示素子とするテレビやデータディスプレイなどの液晶表示装置の構成要素である光拡散板の温度変化による膨張伸縮に伴う変形を制御する手段に関する。 The present invention relates to a means for controlling deformation accompanying expansion and contraction due to a temperature change of a light diffusing plate which is a component of a liquid crystal display device such as a television or a data display using a liquid crystal display panel as a display element.

従来のブラウン管を表示素子とする表示装置に比し、大型表示画面、高画質および薄型による省スペースなどの多くの優位性を有する液晶表示パネルを表示素子とするテレビやデータディスプレイなどの液晶表示装置の需要が急速に増大しつつある。表示画面の大型化に伴い該液晶表示パネルの背面側に配設される光拡散板のサイズも大型化し、該光拡散板の温度変化による膨張伸縮に伴い発生する変形を適切に制御する手段が必要となっている。 Compared to conventional display devices using cathode ray tubes as display elements, liquid crystal display devices such as televisions and data displays using a liquid crystal display panel having many advantages such as a large display screen, high image quality, and space saving due to thinness. Demand is growing rapidly. With the increase in the size of the display screen, the size of the light diffusing plate disposed on the back side of the liquid crystal display panel is also increased, and means for appropriately controlling the deformation caused by the expansion and contraction due to the temperature change of the light diffusing plate It is necessary.

上記課題への従来の対応手段としての特許文献１では図５に示すごとくバックライトシャーシ２０の底部に配設した同一高さの複数の支柱３８ｂの先端を平板型光拡散板３２の背面に当接させ温度変化や経時変化による該光拡散板３２の変形に伴い発生する表示画面の面輝度不均一の問題が少ないバックライト装置を実現する発明がなされている。 In Patent Document 1 as a conventional means for dealing with the above problem, as shown in FIG. 5, the tips of a plurality of columns 38 b of the same height arranged at the bottom of the backlight chassis 20 are brought into contact with the back surface of the flat plate light diffusion plate 32. An invention has been made to realize a backlight device in which there is little problem of non-uniform surface brightness of the display screen caused by deformation of the light diffusing plate 32 due to temperature change or temporal change.

他の例としての特許文献２による発明では、バックライトのランプハウス底部の反射面に設けた複数本の支柱の内、光拡散板背面の中央部に当接する支柱の高さを該光拡散板の周辺部に当接する支柱の高さ寸法よりも高く形成し、該光拡散板の中央部を液晶表示パネル側に凸状に湾曲させ球面状とすることにより、該光拡散板が該光拡散板の前方に配設された光学シートセットの中央部を押圧させ、熱膨張収縮による光学シートセットの皺の発生を防止している。 In the invention according to Patent Document 2 as another example, among the plurality of columns provided on the reflecting surface at the bottom of the lamp house of the backlight, the height of the column contacting the center of the back surface of the light diffusing plate is set as the light diffusing plate. The light diffusing plate is formed to be higher than the height of the support that abuts on the peripheral portion of the substrate, and the central portion of the light diffusing plate is convexly curved toward the liquid crystal display panel so as to have a spherical shape. The central portion of the optical sheet set disposed in front of the plate is pressed to prevent wrinkling of the optical sheet set due to thermal expansion and contraction.

しかしながら前記特許文献１および特許文献２による発明はいずれも光拡散板の熱膨張による変形を液晶表示パネル側への湾曲により緩和する手段を適用しているため光拡散板の中央部に過度な変形が発生し突出した場合には、該光拡散板は前方に配設された柔軟なフィルム状部材で構成されている光学シートセットの中央部を前方に押し出し、該光学シートセットの中央部が液晶表示パネル背面の中央部に当接する。該光学シートセットが該液晶表示パネル背面に当接することにより年輪状の縞模様の「ニュートンリング」と呼ばれる陰影が液晶表示パネル前方に位置する観視者により視認され表示画像品位の低下を招く。
特開平１０−３２６５１７号公報 特開２００４−２３３８２８号公報 However, since the inventions according to Patent Document 1 and Patent Document 2 both apply means for mitigating deformation due to thermal expansion of the light diffusing plate by bending toward the liquid crystal display panel, excessive deformation is caused at the center of the light diffusing plate. When this occurs, the light diffusing plate pushes forward the central portion of the optical sheet set composed of a flexible film-like member disposed in front, and the central portion of the optical sheet set is liquid crystal Contact the center of the back of the display panel. When the optical sheet set comes into contact with the back surface of the liquid crystal display panel, a shadow called “Newton ring” having an annual ring-like stripe pattern is visually recognized by a viewer located in front of the liquid crystal display panel, resulting in deterioration of display image quality.
JP-A-10-326517 JP 2004-233828 A

光拡散板の熱膨張による変形を液晶表示パネル側への湾曲により緩和する手段を適用した液晶表示装置においては、該光拡散板の中央部に過度な変形が発生し液晶パネル側に突出した場合に該光拡散板の前方に配設された柔軟なフィルム状部材で構成されている光学シートセットを前方に押し出し、該光学シートセットが、さらに前方に配設された液晶表示パネルの背面中央部に当接することにより年輪状の縞模様の「ニュートンリング」と呼ばれる陰影が液晶表示パネル前方に位置する観視者により視認され表示画像品位の低下を招く。液晶表示装置の薄型化を追求するため液晶表示パネルと光学シートセットの間隔を狭く設定した場合には特に顕著に現れる課題である。 In a liquid crystal display device to which means for mitigating deformation due to thermal expansion of the light diffusing plate by bending toward the liquid crystal display panel is applied, when excessive deformation occurs at the center of the light diffusing plate and the liquid diffusing plate protrudes toward the liquid crystal panel An optical sheet set composed of a flexible film-like member disposed in front of the light diffusing plate is extruded forward, and the optical sheet set is further provided in the center of the back of the liquid crystal display panel disposed further forward. A shadow called “Newton's ring” having an annual ring-like striped pattern is visually recognized by a viewer located in front of the liquid crystal display panel, resulting in a deterioration in display image quality. This is a particularly prominent problem when the distance between the liquid crystal display panel and the optical sheet set is set narrow in order to reduce the thickness of the liquid crystal display device.

また、光拡散板に対し、バックライトシャーシの底部に配設した複数の支柱の先端を該光拡散板の背面に当接させた場合、該光拡散板が膨張時に隣接する該支柱間で該光拡散板が撓み変形することにより表示画像中に縞状の面輝度不均一な陰影が視認され、表示画像品位の低下を招く場合がある。 In addition, when the tips of the plurality of support columns arranged at the bottom of the backlight chassis are brought into contact with the back surface of the light diffusion plate with respect to the light diffusion plate, the light diffusion plate is positioned between the adjacent support columns when expanded. When the light diffusing plate is bent and deformed, a striped shadow with nonuniform surface luminance may be visually recognized in the display image, which may cause deterioration in display image quality.

液晶表示パネルと、該液晶表示パネルの背面に配設した光拡散板および該光拡散板の背面から光照射するためのバックライトユニットを具備する液晶表示装置において、該光拡散板を予め該バックライト側に凸状に湾曲させた球面状に形成する。 In a liquid crystal display device comprising a liquid crystal display panel, a light diffusing plate disposed on the back surface of the liquid crystal display panel, and a backlight unit for irradiating light from the back surface of the light diffusing plate, the light diffusing plate is previously mounted on the back surface. It is formed in a spherical shape that is convexly curved on the light side.

液晶表示パネルと、該液晶表示パネルの背面側に配設した光拡散板および該光拡散板の背面側から光照射するためのバックライトユニットを具備する液晶表示装置において、バックライトユニットシャーシ底部には前記光拡散板が膨張時にバックライト光源側への変形を規制する支柱が設けられ、該支柱の高さは、前記光拡散板の中央部に対向する位置では低く、周辺に向かって序々に高くなるように設定する。 In a liquid crystal display device comprising a liquid crystal display panel, a light diffusing plate disposed on the back side of the liquid crystal display panel, and a backlight unit for irradiating light from the back side of the light diffusing plate, the bottom of the backlight unit chassis Is provided with a support column that restricts deformation to the backlight source side when the light diffusion plate expands, and the height of the support column is low at a position facing the central portion of the light diffusion plate, and gradually toward the periphery. Set to be higher.

液晶表示装置において、バックライトユニット側に凸状に湾曲させ球面状に形成された球面状光拡散板の背面に当接させ支持するため、バックライトユニットの底面に配設された複数の支柱の高さを該球面状光拡散板の球面形状に沿って変える。 In a liquid crystal display device, a plurality of support columns disposed on the bottom surface of the backlight unit are supported by contacting the back surface of a spherical light diffusion plate that is curved in a convex shape toward the backlight unit and is formed into a spherical shape. The height is changed along the spherical shape of the spherical light diffusing plate.

液晶表示装置において、バックライトユニット側に凸状に湾曲させ球面状に形成された光拡散板の背面側に配設された支柱先端部および該光拡散板背面間に間隙を設ける。 In the liquid crystal display device, a gap is provided between the column tip portion disposed on the back side of the light diffusing plate that is convexly curved on the backlight unit side and is formed in a spherical shape, and the back surface of the light diffusing plate.

液晶表示装置の液晶表示パネル背面側に配設された光拡散板を、予めバックライトユニット側に凸状に湾曲させた球面状に形成することにより該液晶表示装置を使用中の内部温度上昇により該光拡散板が熱膨張した場合においても、該光拡散板はバックライトユニット側の特定方向にのみ撓み、該光拡散板の前方に配設された光学シートセットを介して該液晶表示パネル背面に接触することを回避することが出来、表示画像品位の低下を招く「ニュートンリング」の発生を防止することが可能となる。 By forming the light diffusion plate disposed on the back side of the liquid crystal display panel of the liquid crystal display device into a spherical shape that is curved in a convex shape on the backlight unit side in advance, the internal temperature rise during use of the liquid crystal display device Even when the light diffusing plate is thermally expanded, the light diffusing plate is bent only in a specific direction on the backlight unit side, and the back surface of the liquid crystal display panel is interposed through an optical sheet set disposed in front of the light diffusing plate. It is possible to avoid contact with the “newton ring” and to prevent the occurrence of “Newton's ring”, which causes deterioration in display image quality.

バックライトユニットの底部に配設された複数の支柱の高さを、予めバックライトユニット側に凸状に湾曲した球面状に形成した球面状光拡散板の中央部では低く、該球面状光拡散板の周辺部では高く形成し、且つ該球面状光拡散板および該支柱の先端間に間隙を設けることにより、該球面状光拡散板が熱膨張を発生した場合においても、該球面状光拡散板に波状の変形を発生せず表示画像品位を損なうことがない。 The height of the plurality of support columns arranged at the bottom of the backlight unit is low at the central portion of the spherical light diffusion plate formed in a spherical shape convexly curved in advance to the backlight unit side. Even if the spherical light diffusing plate is thermally expanded, the spherical light diffusing plate is formed high at the periphery of the plate and a gap is provided between the spherical light diffusing plate and the tip of the support column. No wavy deformation occurs on the plate, and the display image quality is not impaired.

以下、図に基づき本発明の実施形態を液晶テレビに適用した場合に関し説明する。図１は液晶テレビを示し、図１（ａ）は正面図、図１（ｂ）は上面図、図１（ｃ）は該液晶テレビ１内部の光学系の概要構成図である。図１において、２は画像を表示するための液晶表示パネル、３は前キャビネット、４はスタンド、５は後ろキャビネットである。 Hereinafter, a case where an embodiment of the present invention is applied to a liquid crystal television will be described with reference to the drawings. 1A and 1B show a liquid crystal television, FIG. 1A is a front view, FIG. 1B is a top view, and FIG. 1C is a schematic configuration diagram of an optical system inside the liquid crystal television 1. In FIG. 1, 2 is a liquid crystal display panel for displaying an image, 3 is a front cabinet, 4 is a stand, and 5 is a rear cabinet.

次に、図１（ｃ）に基づき液晶テレビ１内部の光学系の概要構成を説明する。液晶表示パネル２の背面側には表示画像の高輝度化や面輝度均一性を向上させるための光学シートセット１１および球面状光拡散板１２が、さらに後方には該光拡散板１２の背面から光照射するためのバックライトユニット１９が配設されている。該バックライトユニット１９を構成するバックライトシャーシ２０の底面には光反射シート１３がランプクリップ１８により固定され、該光反射シート１３の前面には複数の管状のランプ１４の両端が第１のランプホルダ１５および第２のランプホルダ１６により挟持され、さらに螺子１７によりバックライトシャーシ２０に係止されている。 Next, a schematic configuration of the optical system inside the liquid crystal television 1 will be described with reference to FIG. On the back side of the liquid crystal display panel 2, an optical sheet set 11 and a spherical light diffusing plate 12 for increasing the brightness of the display image and improving the surface luminance uniformity are provided, and further on the rear side from the back side of the light diffusing plate 12. A backlight unit 19 for irradiating light is provided. A light reflecting sheet 13 is fixed to a bottom surface of a backlight chassis 20 constituting the backlight unit 19 by a lamp clip 18, and both ends of a plurality of tubular lamps 14 are first lamps on the front surface of the light reflecting sheet 13. It is sandwiched between the holder 15 and the second lamp holder 16 and is further locked to the backlight chassis 20 by screws 17.

図２は管状のランプ１４の中央部を支持するためのランプクリップ１８の斜視図である。ランプクリップ１８のベース部１８ｃには複数のランプ１４を固定するための複数のクリップ部１８ａと、ベース部１８ｃから突出した支柱（長寸）１８ｂおよび支柱（短寸）１８ｅなどの支柱、さらには該ランプクリップ１８を光反射シート１３の挿通孔に挿通しバックライトシャーシ２０の取り付け孔に嵌合係止するための係止部１８ｄが一体に成型されている。複数の該支柱は図３にも示すごとく球面状光拡散板１２の中央部近傍の支柱（短寸）１８ｅの高さは低く、球面状光拡散板１２の周辺部の支柱（長寸）１８ｂの高さは高く形成されている。 FIG. 2 is a perspective view of a lamp clip 18 for supporting the central portion of the tubular lamp 14. The base portion 18c of the lamp clip 18 includes a plurality of clip portions 18a for fixing the plurality of lamps 14, a support column such as a support column (long dimension) 18b and a support column (short dimension) 18e protruding from the base unit 18c, and A locking portion 18d for inserting the lamp clip 18 into the insertion hole of the light reflecting sheet 13 and fitting and locking it to the mounting hole of the backlight chassis 20 is integrally formed. As shown in FIG. 3, the plurality of pillars have a low pillar (short dimension) 18 e near the center of the spherical light diffusion plate 12, and the pillars (long dimension) 18 b in the peripheral part of the spherical light diffusion plate 12 are low. The height of is formed high.

図３は本発明の第１の実施形態を示し、図１（ａ）中に鎖線で示す切断線Ｃ−Ｃに沿って切断した縦断面図である。液晶表示パネル２の背面側には柔軟な部材で構成された光学シートセット１１が、該光学シートセット１１の後方には本発明の第１の実施形態としての凸状にバックライトユニット側に湾曲し球面状に形成した球面状光拡散板１２が配設されている。一方、バックライトユニットを構成するバックライトシャーシ２０の底面にはランプクリップ１８に一体に成型された係止部１８ｄが光反射シート１３を挿通し係止されている。該ランプクリップ１８のベース部１８ｃにはクリップ部１８ａおよび支柱（長寸）１８ｂや支柱（短寸）１８ｅなどの支柱が該ランプクリップ１８に一体に成型されている。 FIG. 3 shows a first embodiment of the present invention, and is a longitudinal sectional view cut along a cutting line CC shown by a chain line in FIG. An optical sheet set 11 made of a flexible member is provided on the back side of the liquid crystal display panel 2, and the optical sheet set 11 is curved toward the backlight unit side in a convex shape as the first embodiment of the present invention behind the optical sheet set 11. A spherical light diffusing plate 12 formed in a spherical shape is disposed. On the other hand, a locking portion 18d molded integrally with the lamp clip 18 is inserted and locked on the bottom surface of the backlight chassis 20 constituting the backlight unit. The base portion 18c of the lamp clip 18 has a clip portion 18a and struts such as a strut (long dimension) 18b and a strut (short dimension) 18e formed integrally with the lamp clip 18.

図３は本発明の第２の実施形態をも示している。図３中に示すランプクリップ１８には高さの異なる複数の支柱が該ランプクリップ１８に一体に成型され、球面状光拡散板１２の中央部に近いほど該支柱の高さ寸法を低く、球面状光拡散板１２の中心部から遠ざかり周辺部に近いほど該支柱の高さ寸法を高く形成し、各支柱の先端部を結んだ仮想線が描く曲線を該球面状光拡散板１２の背面形状に近似させ形成している。したがって図３に示すごとく各支柱の先端は該球面状光拡散板１２に当接し、温度変化により該球面状光拡散板１２が熱膨張収縮した場合においても常にバックライトユニット側に凸状に湾曲した状態が維持され、液晶パネル２の背面に光学シートセット１１が当接し表示画像に「ニュートンリング」の陰影を発生する不都合を発生させることはない。 FIG. 3 also shows a second embodiment of the present invention. In the lamp clip 18 shown in FIG. 3, a plurality of pillars having different heights are formed integrally with the lamp clip 18, and the height of the pillar is reduced as it is closer to the center of the spherical light diffusion plate 12. The distance from the center of the light diffusion plate 12 and the closer to the periphery, the higher the height of the column, and the curved line drawn by the imaginary line connecting the tips of the columns is the shape of the back surface of the spherical light diffusion plate 12 It is approximated to form. Therefore, as shown in FIG. 3, the tip of each column abuts against the spherical light diffusing plate 12, and even when the spherical light diffusing plate 12 is thermally expanded and contracted due to temperature change, it always curves convexly toward the backlight unit. Thus, the optical sheet set 11 is brought into contact with the back surface of the liquid crystal panel 2 so that there is no inconvenience of causing a “Newton ring” shadow on the display image.

前記第２の実施形態では図３に示すごとく、高さの異なる複数の支柱先端は該球面状光拡散板１２の背面に当接している。この状態で該球面状光拡散板１２が過度の熱膨張を発生した場合には図３（ｂ）に拡大図に示すごとく各支柱間において波状の撓みを発生し、表示画面には縞状の面輝度不均一模様が視認され表示品位の低下を招くことがある。 In the second embodiment, as shown in FIG. 3, the tips of the plurality of columns having different heights are in contact with the back surface of the spherical light diffusion plate 12. In this state, when the spherical light diffusing plate 12 generates excessive thermal expansion, as shown in the enlarged view of FIG. 3B, wavy deflection occurs between the columns, and the display screen is striped. A nonuniform surface luminance pattern may be visually recognized, leading to a reduction in display quality.

前記問題に対する対応手段を図４に本発明の第３の実施形態として示している。図４は図１（ａ）中に鎖線で示す切断線Ｃ−Ｃに沿って切断した縦断面図である。前記第２の実施形態では、高さの異なる複数の支柱の先端は該球面状光拡散板１２の背面に当接しているが、図４に示す本発明の第３の実施形態では球面状光拡散板１２の背面およびランプクリップ２８に一体に成型された支柱の先端間に間隙を設けている。該球面状光拡散板１２が熱膨張した場合には該球面状拡散板１２は該球面状拡散板１２の後方に向かって自由に膨張変形し、さらに過度な熱膨張が発生した場合のみ該球面状光拡散板１２の背面が支柱（長寸）２８ｂや支柱（短寸）２８ｅなどの先端に当接し始め、球面状光拡散板１２のより大きな熱膨張変形量を受容し制御することを可能としている。 A means for dealing with the above problem is shown in FIG. 4 as a third embodiment of the present invention. FIG. 4 is a longitudinal sectional view cut along a cutting line CC indicated by a chain line in FIG. In the second embodiment, the tips of a plurality of columns having different heights are in contact with the back surface of the spherical light diffusing plate 12, but in the third embodiment of the present invention shown in FIG. A gap is provided between the back surface of the diffuser plate 12 and the ends of the pillars molded integrally with the lamp clip 28. When the spherical light diffusing plate 12 is thermally expanded, the spherical diffusing plate 12 freely expands and deforms toward the rear of the spherical diffusing plate 12, and only when the excessive thermal expansion occurs. It is possible to accept and control the larger amount of thermal expansion deformation of the spherical light diffusing plate 12 when the back surface of the light diffusing plate 12 starts to come into contact with the tips of the supporting column (long size) 28b and the supporting column (short size) 28e. It is said.

尚、本発明の実施の形態においては、短寸支柱と長寸支柱が一体化されたランプクリップと球面状光拡散板の対として説明したが、平板状の光拡散板との組合わせにて使用した場合でも、光拡散板の中央部付近に短寸支柱が対向し、周辺方向に向かって長寸化する支柱を対向配置することで光拡散板の熱膨張変形形状に相似した支柱配置となり、該光拡散板が膨張時に隣接する該支柱間で該光拡散板が撓み変形することにより表示画像中に縞状の面輝度不均一な陰影が視認され、表示画像品位の低下を防止することが可能となる。 In the embodiment of the present invention, the lamp clip in which the short column and the long column are integrated is described as a pair of the spherical light diffusion plate, but the combination of the flat light diffusion plate is used. Even if it is used, the short struts oppose the central part of the light diffuser plate, and the struts that become longer in the peripheral direction are opposed to each other, so that the strut arrangement resembles the thermal expansion deformation shape of the light diffuser plate. In addition, when the light diffusing plate expands, the light diffusing plate bends and deforms between adjacent struts so that a striped surface brightness non-uniform shadow is visually recognized in the display image, thereby preventing deterioration in display image quality. Is possible.

本発明に係わる液晶テレビの図１（ａ）は正面図、図１（ｂ）は天面図、図１（ｃ）は内部の光学系の概要構成図である。1A is a front view, FIG. 1B is a top view, and FIG. 1C is a schematic configuration diagram of an internal optical system of the liquid crystal television according to the present invention. 本発明の実施形態を説明するためのランプクリップの斜視図である。It is a perspective view of the lamp clip for demonstrating embodiment of this invention. 本発明の第１および第２の実施形態を示し、図３（ａ）は図１（ａ）中に鎖線で示す切断線Ｃ−Ｃに沿って切断した縦断面図、図３（ｂ）は図中の鎖線による囲み部分の拡大図である。FIGS. 3A and 3B show the first and second embodiments of the present invention. FIG. 3A is a longitudinal sectional view taken along a cutting line CC shown by a chain line in FIG. It is an enlarged view of the enclosure part by the chain line in a figure. 本発明の第３の実施形態を示し、図１（ａ）中に鎖線で示す切断線Ｃ−Ｃに沿って切断した縦断面図である。It is the longitudinal cross-sectional view which showed the 3rd Embodiment of this invention and was cut | disconnected along the cutting | disconnection line CC shown with a dashed line in Fig.1 (a). 従来例としての液晶テレビの縦断面図である。It is a longitudinal cross-sectional view of the liquid crystal television as a prior art example.

符号の説明Explanation of symbols

１： 液晶テレビ
２： 液晶表示パネル
３： 前キャビネット
４： スタンド
５： 後ろキャビネット
１１： 光学シートセット
１２： 球面状光拡散板
１３： 光反射シート
１４： ランプ
１５： 第１のランプホルダ
１６： 第２のランプホルダ
１７： 螺子
１８： ランプクリップ
１８ａ： クリップ部
１８ｂ： 支柱（長寸）
１８ｃ： ベース部
１８ｄ： 係止部
１８ｅ： 支柱（短寸）
１９： バックライトユニット
２０： バックライトシャーシ
２８： ランプクリップ
２８ａ： クリップ部
２８ｂ： 支柱（長寸）
２８ｃ： ベース部
２８ｄ： 係止部
２８ｅ： 支柱（短寸）
３２： 平板状光拡散板
３８： ランプクリップ
３８ａ： クリップ部
３８ｂ： 支柱
３８ｃ： ベース部
３８ｄ： 係止部 1: liquid crystal television 2: liquid crystal display panel 3: front cabinet 4: stand 5: rear cabinet 11: optical sheet set 12: spherical light diffusion plate 13: light reflecting sheet 14: lamp 15: first lamp holder 16: first Second lamp holder 17: Screw 18: Lamp clip 18a: Clip part 18b: Post (long size)
18c: Base portion 18d: Locking portion 18e: Post (short size)
19: Backlight unit 20: Backlight chassis 28: Lamp clip 28a: Clip part 28b: Post (long size)
28c: Base portion 28d: Locking portion 28e: Post (short size)
32: Flat light diffusing plate 38: Lamp clip 38a: Clip portion 38b: Support column 38c: Base portion 38d: Locking portion

Claims (4)

液晶表示パネルと、該液晶表示パネルの背面側に配設した光拡散板および該光拡散板の背面側から光照射するためのバックライトユニットを具備する液晶表示装置において、該光拡散板を該バックライトユニット側に凸状に湾曲させた球面状に形成したことを特徴とした液晶表示装置。 In a liquid crystal display device comprising a liquid crystal display panel, a light diffusing plate disposed on the back side of the liquid crystal display panel, and a backlight unit for irradiating light from the back side of the light diffusing plate, the light diffusing plate is A liquid crystal display device characterized in that it is formed in a spherical shape convexly curved toward the backlight unit. 液晶表示パネルと、該液晶表示パネルの背面側に配設した光拡散板および該光拡散板の背面側から光照射するためのバックライトユニットを具備する液晶表示装置において、バックライトユニットシャーシ底部には前記光拡散板が膨張時にバックライト光源側への変形を規制する支柱が設けられ、該支柱の高さは、前記光拡散板の中央部に対向する位置では低く、周辺に向かって序々に高くなるように設定されたことを特徴とする液晶表示装置。 In a liquid crystal display device comprising a liquid crystal display panel, a light diffusing plate disposed on the back side of the liquid crystal display panel, and a backlight unit for irradiating light from the back side of the light diffusing plate, the bottom of the backlight unit chassis Is provided with a support column that restricts deformation to the backlight source side when the light diffusion plate expands, and the height of the support column is low at a position facing the central portion of the light diffusion plate, and gradually toward the periphery. A liquid crystal display device characterized by being set to be high. 請求項１に記載の液晶表示装置において、バックライトユニット側に凸状に湾曲させた球面状に形成した球面状光拡散板が膨張時に該球面状光拡散板の背面に当接し該球面状光拡散板を支持するため、バックライトユニットシャーシ底部に配設された複数の支柱の高さを該球面状光拡散板の球面形状に沿って変えたことを特徴とする液晶表示装置。 2. The liquid crystal display device according to claim 1, wherein a spherical light diffusing plate formed into a spherical shape convexly curved toward the backlight unit abuts against the back surface of the spherical light diffusing plate when expanded, and the spherical light A liquid crystal display device characterized in that, in order to support the diffusion plate, the height of a plurality of support columns disposed on the bottom of the backlight unit chassis is changed along the spherical shape of the spherical light diffusion plate. 請求項３に記載の液晶表示装置において、バックライトユニット側に凸状に湾曲させた球面状に形成した球面状光拡散板の背面側に配設された複数の支柱の先端部分および該球面状光拡散板の背面間に間隙を設けたことを特徴とする液晶表示装置。 4. The liquid crystal display device according to claim 3, wherein tip portions of a plurality of support columns disposed on the back side of a spherical light diffusion plate formed in a spherical shape convexly curved toward the backlight unit and the spherical shape. A liquid crystal display device characterized in that a gap is provided between the back surfaces of the light diffusion plate.
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