JP6053306B2 - Image display device - Google Patents

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JP6053306B2
JP6053306B2 JP2012081182A JP2012081182A JP6053306B2 JP 6053306 B2 JP6053306 B2 JP 6053306B2 JP 2012081182 A JP2012081182 A JP 2012081182A JP 2012081182 A JP2012081182 A JP 2012081182A JP 6053306 B2 JP6053306 B2 JP 6053306B2
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image display
display device
liquid crystal
panel
display panel
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JP2013210509A (en
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安田 真吾
真吾 安田
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Canon Inc
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Description

本発明は、画像表示装置に関するものである。   The present invention relates to an image display device.

近年の表示装置の薄型軽量化と共に、表示装置用の液晶パネルに用いられるガラス厚も薄型化している。このように薄型化が進む液晶パネルを垂直姿勢で支持する際に、液晶パネルが保持部材などから受ける外的ストレスは、液晶の配向性に影響を与え表示ムラを引き起こし画像の表示品質に影響を与える場合がある。液晶表示装置では、液晶パネル表示面(以下、表面)の反対側(以下、背面)にバックライトが配置される。表示ムラは、液晶パネルに全画面黒表示の画像信号を入力した状態(ノーマリー・ブラックの液晶パネルの場合、対向する一対のガラス基板間に電圧を印加しない状態)において、バックライトからの光の漏れとして現れる。この漏れ光によって全画面黒表示の一部領域の輝度が高くなる黒浮きが生じ、結果として表示ムラとして観察される。   With the recent thinning and lightening of display devices, the glass thickness used for liquid crystal panels for display devices has also been reduced. When supporting thin LCD panels in a vertical position, the external stress that the LCD panel receives from the holding member affects the orientation of the liquid crystals, causing display unevenness and affecting the display quality of images. May give. In the liquid crystal display device, a backlight is disposed on the opposite side (hereinafter, back surface) of the liquid crystal panel display surface (hereinafter, surface). The display unevenness is caused by the light from the backlight in a state where an image signal for full screen black display is input to the liquid crystal panel (in the case of a normally black liquid crystal panel, a voltage is not applied between a pair of opposing glass substrates). Appears as a leak. Due to this leakage light, black floating occurs in which the luminance of a partial area of the full-screen black display is increased, and as a result, it is observed as display unevenness.

図5(A)は従来の液晶表示装置の分解斜視図、図5(B)は従来の液晶表示装置の、液晶パネルに垂直かつ水平方向に垂直の断面による断面図の一部を示す。図5(A)または図5(B)に示すように、従来の液晶表示装置500は、液晶パネル503背面のパネルホルダー502と、それに対向する液晶パネル503表面の前面フレーム504で支持され、装置の設置状態で垂直姿勢を保つ。パネルホルダー502、前面フレーム504ともに、液晶パネル503を損傷しないよう画像表示エリア外の周縁部で当接する面には各々弾性部材505、クッション部材506が貼付され、液晶パネル503をわずかな間隙をもって可動可能に挟持している。そのためパネルホルダー502と前面フレーム504は、厚さ方向にわずかな間隙を持って液晶パネル503を挟持し、液晶パネル503への外的ストレスを低減することで表示ムラの発生を抑える構成としている。   FIG. 5A is an exploded perspective view of a conventional liquid crystal display device, and FIG. 5B is a partial cross-sectional view of the conventional liquid crystal display device with a cross section perpendicular to the liquid crystal panel and perpendicular to the horizontal direction. As shown in FIG. 5A or FIG. 5B, a conventional liquid crystal display device 500 is supported by a panel holder 502 on the back surface of the liquid crystal panel 503 and a front frame 504 on the surface of the liquid crystal panel 503 facing the device. Keep the vertical posture in the installed state. Both the panel holder 502 and the front frame 504 are attached with elastic members 505 and cushion members 506 on the surfaces that contact the peripheral edge outside the image display area so as not to damage the liquid crystal panel 503, and the liquid crystal panel 503 can be moved with a slight gap. It is pinched as possible. For this reason, the panel holder 502 and the front frame 504 sandwich the liquid crystal panel 503 with a slight gap in the thickness direction and reduce external stress on the liquid crystal panel 503, thereby suppressing display unevenness.

さらにパネルホルダー502は液晶パネル503の端面と当接しその自重を支える構成となっている。その当接面である液晶パネル503の端面は大型のマザーガラス基板を何分割かに切断して得られるため、平坦になっておらずバリが発生していたり、一対のガラス基板の貼合わせ境界面でのずれが生じエッジが露出したりすることがあった。そのため液晶パネル503を厚み方向に可動可能に挟持しているにもかかわらず、液晶パネル503の端面とパネルホルダー502との当接面で引っ掛かりが生じ、液晶パネル503に加わる応力が解放されず表示ムラが発生してしまうことがあった。そのため先行技術文献1では、液晶パネルの自重とパネルホルダーの傾斜面を利用して液晶パネル端面とパネルホルダーとの引っ掛かりによる応力を解放し、液晶パネルを表面側に押し戻す構成が開示されている。   Further, the panel holder 502 is in contact with the end face of the liquid crystal panel 503 and supports its own weight. Since the end surface of the liquid crystal panel 503, which is the contact surface, is obtained by cutting a large mother glass substrate into several parts, it is not flat and burrs are generated, or the bonding boundary between a pair of glass substrates In some cases, the edge is exposed due to a shift in the surface. Therefore, although the liquid crystal panel 503 is movably held in the thickness direction, the contact surface between the end surface of the liquid crystal panel 503 and the panel holder 502 is caught, and the stress applied to the liquid crystal panel 503 is not released. Unevenness may occur. For this reason, the prior art document 1 discloses a configuration in which the liquid crystal panel is pushed back to the surface side by releasing the stress caused by the engagement between the end face of the liquid crystal panel and the panel holder using the weight of the liquid crystal panel and the inclined surface of the panel holder.

特開2010−204357号公報JP 2010-204357 A

しかしながら、先行技術による解決手段では液晶パネル表示面の反対面側の弾性部材よりも下方にパネルホルダーの傾斜面を設ける構造であるため、液晶表示装置の狭額縁化が困難であった。また中型もしくは大型液晶パネルにおいては、液晶パネル自体が平坦面ではなく反りを有しているため、液晶パネルを確実に組込位置に押し戻すことは困難であり、液晶パネルに加わる応力が十分に解放されない場合があった。   However, since the prior art solution has a structure in which the inclined surface of the panel holder is provided below the elastic member on the opposite side of the liquid crystal panel display surface, it is difficult to narrow the frame of the liquid crystal display device. In addition, in a medium-sized or large-sized liquid crystal panel, the liquid crystal panel itself has a warp rather than a flat surface, so it is difficult to reliably push the liquid crystal panel back to the installation position, and the stress applied to the liquid crystal panel is released sufficiently. There was no case.

そこで本発明の目的は、液晶パネルに加わる応力に起因する表示ムラを低減することができる液晶表示装置を提供することである。   Accordingly, an object of the present invention is to provide a liquid crystal display device capable of reducing display unevenness due to stress applied to the liquid crystal panel.

本発明は、表示面を有する表示パネルと、
前記表示パネルを保持するパネルホルダーと、
を有する画像表示装置であって
前記パネルホルダーは、
前記画像表示装置の使用状態において、前記表示パネルの下端を支持する第1の部材と、
前記表示パネルの前記表示面の反対側にある背面支持する第2の部材と、
を有し、
前記第1の部材は、前記表示パネルの下端の複数の領域を支持する複数の支持部を有し、
前記第2の部材は、前記複数の支持部が支持する前記表示パネルの複数の領域に対応する位置に、前記表示パネルの表示面に垂直な方向の厚みを他の部分より大きくした複数の***部を有することを特徴とする画像表示装置である。
The present invention includes a display panel having a display surface ;
A panel holder for holding the display panel;
An image display apparatus which have a,
The panel holder is
In the use state of the image display device, a first member for supporting lifting the lower end of the display panel,
A second member for supporting a back surface on the opposite side of the display surface of the display panel;
Have
The first member has a plurality of support portions that support a plurality of regions at the lower end of the display panel;
The second member has a plurality of bulges whose thickness in the direction perpendicular to the display surface of the display panel is larger than that of other portions at positions corresponding to the plurality of regions of the display panel supported by the plurality of support portions. An image display device characterized by having a section.

本発明によれば、液晶パネルに加わる応力に起因する表示ムラを低減することができる液晶表示装置が提供される。   ADVANTAGE OF THE INVENTION According to this invention, the liquid crystal display device which can reduce the display nonuniformity resulting from the stress added to a liquid crystal panel is provided.

本発明の第一実施例の分解斜視図および断面斜視図を示す。An exploded perspective view and a section perspective view of the first example of the present invention are shown. 液晶パネルの反り測定結果およびパネル反り形状の概形を示す。The warpage measurement result of the liquid crystal panel and the outline of the panel warp shape are shown. 図2の破断線K−Kにおける断面図および第一実施例の変形例を示す。Sectional drawing in broken line KK of FIG. 2 and the modification of a 1st Example are shown. 本発明の第一実施例の分解斜視図、断面斜視図および断面図を示す。The exploded perspective view of a 1st example of the present invention, a section perspective view, and a sectional view are shown. 従来例の液晶表示装置の断面斜視図および断面図を示す。The cross-sectional perspective view and sectional drawing of the liquid crystal display device of a prior art example are shown.

以下、添付図面を参照して本発明の実施例を説明する。なお、本発明の技術的範囲は、特許請求の範囲によって確定されるのであって、以下の個別の実施例によって限定されるわけではない。また、実施例の中で説明されている特徴の組み合わせすべてが、本発明に必須とは限らない。   Embodiments of the present invention will be described below with reference to the accompanying drawings. The technical scope of the present invention is determined by the scope of the claims, and is not limited by the following individual embodiments. In addition, all combinations of features described in the embodiments are not necessarily essential to the present invention.

(実施例1)
図1及び図3を用いて第一の実施例の一例を示す。図1(A)は本発明の画像表示装置の第一実施例の分解斜視図、図1(B)は図1(A)のB部における断面拡大斜視図を示す。
Example 1
An example of the first embodiment will be described with reference to FIGS. 1 and 3. FIG. 1A is an exploded perspective view of the first embodiment of the image display device of the present invention, and FIG. 1B is an enlarged perspective view of a cross section at a portion B in FIG.

図1(A)において表示パネルである液晶パネル103の表面側には、その画像表示領域よりも広い開口を有した枠状の前面フレーム104が配置されている。本実施例では前面フレーム104が、長辺の前面フレーム104b、104dと短辺の前面フレーム104a、104cの4個の部品から構成されているものとするが、前面フレーム104は一体形成により構成されていてもよい。前面フレーム104は、板厚0.8〜1.0(mm)程度の鉄またはアルミニウムの薄板をプレス成型して得られる。液晶パネル103の表面と対向する内側面に厚さ約0.1〜1.0(mm)程度で薄く、アスカーC硬度10〜30程度の軟らかいクッション部材105a、105bが貼付されている。クッション部材105aは短辺の前面フレーム104a、104cに貼付され、クッション部材105bは長辺の前面フレーム104b、104dに貼付されている。クッション部材105と液晶パネル103の表面との間には、液晶パネル103の表示面に表示ムラの要因となるストレスが加わらないよう厚さ方向(表示面に垂直の方向)に0.1〜1.0(mm)程度のクリアランスが設けられる。   In FIG. 1A, a frame-shaped front frame 104 having an opening wider than the image display area is disposed on the surface side of the liquid crystal panel 103 which is a display panel. In the present embodiment, the front frame 104 is composed of four parts, that is, the long side front frames 104b and 104d and the short side front frames 104a and 104c. It may be. The front frame 104 is obtained by press-molding a thin plate of iron or aluminum having a thickness of about 0.8 to 1.0 (mm). Soft cushion members 105a and 105b having a thickness of about 0.1 to 1.0 (mm) and a thin Asker C hardness of about 10 to 30 are affixed to the inner surface facing the surface of the liquid crystal panel 103. The cushion member 105a is affixed to the short side front frames 104a and 104c, and the cushion member 105b is affixed to the long side front frames 104b and 104d. Between the cushion member 105 and the surface of the liquid crystal panel 103, 0.1 to 1 in the thickness direction (perpendicular to the display surface) is applied so that stress that causes display unevenness is not applied to the display surface of the liquid crystal panel 103. A clearance of about 0.0 (mm) is provided.

液晶パネル103は、パネルホルダー102a、102b、102c、及び102dにより保持される。パネルホルダーには、液晶パネル103を背面から支持する背面支持部
材102gが設けられ、背面支持部材102gの一部には***部102fが設けられる。背面支持部材102gには、***部102f及びその他の部分にわたって、弾性部材101が設けられる。弾性部材101は、後述するように、液晶表示装置が使用される状態において液晶パネル103の背面に少なくとも一部が当接することによって液晶パネル103を背面から支持する。パネルホルダーには、液晶表示装置が使用される状態において下端となる辺を支持する位置に下端支持部材である支持部102eが設けられる。本実施例では、液晶パネル103の表示領域の周囲の枠状領域の背面に対向するように、液晶パネル103の各辺に沿って背面支持部材102gが設けられる。また、***部102fは、その各辺に沿って設けられる背面支持部材102gのうち特に、液晶表示装置が使用される状態において下端支持部材である支持部102eと接触する液晶パネル103の辺に沿って設けられる背面支持部材102gに設けられる。前面フレーム104dを重力方向の下側に配置つまり液晶パネル103を鉛直方向に設置した場合、液晶パネル103の下端はパネルホルダー102dの支持部102eで支えられる。支持部102eは、液晶パネル103の下端と接し且つ安定支持できるよう充分な間隔を隔ててパネルホルダー102dに少なくとも2ヶ所設けられている。支持部102eが設けられる間隔は、液晶パネル103の反り形状や液晶封入口(図示せず)の設置箇所を考慮して決められる。
The liquid crystal panel 103 is held by panel holders 102a, 102b, 102c, and 102d. The panel holder is provided with a back support member 102g for supporting the liquid crystal panel 103 from the back, and a raised portion 102f is provided at a part of the back support member 102g. The back support member 102g is provided with an elastic member 101 over the raised portion 102f and other portions. As will be described later, the elastic member 101 supports the liquid crystal panel 103 from the back surface by at least partly contacting the back surface of the liquid crystal panel 103 when the liquid crystal display device is used. The panel holder is provided with a support portion 102e that is a lower end support member at a position that supports a side that is a lower end when the liquid crystal display device is used. In the present embodiment, a back support member 102g is provided along each side of the liquid crystal panel 103 so as to face the back of the frame-shaped region around the display region of the liquid crystal panel 103. Further, the raised portion 102f is located along the side of the liquid crystal panel 103 that comes into contact with the support portion 102e that is the lower end support member in the state where the liquid crystal display device is used, among the back surface support members 102g provided along the respective sides. The back support member 102g is provided. When the front frame 104d is arranged below the gravity direction, that is, when the liquid crystal panel 103 is installed in the vertical direction, the lower end of the liquid crystal panel 103 is supported by the support portion 102e of the panel holder 102d. At least two support portions 102e are provided on the panel holder 102d at a sufficient interval so as to contact and stably support the lower end of the liquid crystal panel 103. The interval at which the support portion 102e is provided is determined in consideration of the warped shape of the liquid crystal panel 103 and the installation location of a liquid crystal sealing port (not shown).

さらに四辺のパネルホルダー102の液晶パネル103背面と対向する面には、パネルホルダー102の延伸方向に沿うように弾性部材101が貼付けられている。パネルホルダー102dの貼付面のうち、支持部102e近傍には***部102fが設けられ、この***部102fに沿って貼付けられた弾性部材101の弾性力によって、液晶パネル103の引っ掛かりを解放する押圧力が作用する。この弾性力により、支持部102eで液晶パネル103の下端が引っ掛かることが抑制され、液晶パネル103が元の形状になるように(引っ掛かりにより生じた変形が解消されるように)前方へ押し戻される。   Further, an elastic member 101 is attached to a surface of the four-side panel holder 102 facing the back surface of the liquid crystal panel 103 so as to extend along the extending direction of the panel holder 102. Of the affixing surface of the panel holder 102d, a raised portion 102f is provided in the vicinity of the support portion 102e. Works. This elastic force suppresses the lower end of the liquid crystal panel 103 from being hooked by the support portion 102e, and the liquid crystal panel 103 is pushed back to the original shape (so that the deformation caused by the hook is eliminated).

弾性部材101の厚さと長さに関して以下に述べる。液晶パネルの重量を約1.3(kgf)、液晶パネル103とパネルホルダー102dの静止摩擦係数を0.25とした場合、パネルを水平方向に押し戻すために必要な力は、次のように求められる。

1.3×0.25=0.325(kgf)・・・(1)
The thickness and length of the elastic member 101 will be described below. When the weight of the liquid crystal panel is about 1.3 (kgf) and the coefficient of static friction between the liquid crystal panel 103 and the panel holder 102d is 0.25, the force required to push the panel back in the horizontal direction is obtained as follows. It is done.

1.3 × 0.25 = 0.325 (kgf) (1)

次に弾性部材101の幅3(mm)、厚さ2(mm)の15%となる約0.3(mm)圧縮して得られる単位面積あたりの押圧力は、その物性値から約1.4×10−3(kg/mm2)となる。パネルホルダー102dの延伸方向に少なくとも2箇所に設けられた***部102fの長さをW(mm)とすると、(1)式で得られた値を用いて

0.325=(1.4×10−3×3×W)×2
W=38.6(mm)・・・(2)

が得られる。つまり***部102fは、その長さWを約40(mm)、少なくとも2箇所パネルホルダー102dに設ければ良い。ここで図示はしないが仮に***部102fに対応する箇所のみ部分的に厚さが厚い弾性部材を用いたり、厚さの厚い弾性部材を***部102fに別途設けたりすることでも液晶パネル103を押し戻す力を得ることは可能である。
Next, the pressing force per unit area obtained by compressing about 0.3 (mm) which is 15% of the width 3 (mm) and the thickness 2 (mm) of the elastic member 101 is about 1. 4 × 10 −3 (kg / mm 2). When the length of the raised portions 102f provided in at least two places in the extending direction of the panel holder 102d is W (mm), the value obtained by the expression (1) is used.

0.325 = (1.4 × 10 −3 × 3 × W) × 2
W = 38.6 (mm) (2)

Is obtained. That is, the raised portion 102f has a length W of about 40 (mm) and may be provided in at least two panel holders 102d. Although not shown here, the liquid crystal panel 103 is pushed back by using a thick elastic member only in a part corresponding to the raised portion 102f or by separately providing a thick elastic member on the raised portion 102f. It is possible to gain power.

しかし、前者の場合では部分的に厚さの異なる弾性部材の作製や位置合わせ困難であったり、後者の場合では部品点数が増えたりするのに対し、本実施例では弾性部材101の厚さは一様で作製も容易であり、部品点数が増加することもないという点でも有利である。   However, in the case of the former, it is difficult to produce and position an elastic member having a partially different thickness, and in the latter case, the number of parts increases, whereas in this embodiment, the thickness of the elastic member 101 is It is advantageous in that it is uniform and easy to manufacture, and the number of parts does not increase.

図2は、図1の液晶パネル103の反り測定結果の一例を表している。その測定方法としては、液晶パネル103の表示面上の各点a〜nを3次元測定器によりスキャンする方法を例示できる。もしくは簡易的には、前面フレーム104の平坦性が保たれていると仮定し、前面フレーム104と液晶パネル103の表面の間に、隙間ゲージを差し込んで測定する方法でもよい。   FIG. 2 shows an example of a warpage measurement result of the liquid crystal panel 103 of FIG. As the measuring method, a method of scanning each point a to n on the display surface of the liquid crystal panel 103 with a three-dimensional measuring device can be exemplified. Alternatively, a method of measuring by inserting a gap gauge between the front frame 104 and the surface of the liquid crystal panel 103 on the assumption that the flatness of the front frame 104 is maintained may be used.

図2(B)、(D)は、図2(A)の表示面上の各点a〜e、h〜lの位置を横軸、各点に対応する液晶パネル103の厚さ方向の測定値を縦軸として示している。図2(C),(D)は、図2(A)の表示面上の各点e〜h、l〜aの位置を縦軸、各点に対応する液晶パネル103の厚さ方向の測定値を横軸として示している。   2B and 2D, the positions of the points a to e and h to l on the display surface of FIG. 2A are measured on the horizontal axis and the thickness direction of the liquid crystal panel 103 corresponding to the points is measured. Values are shown as the vertical axis. 2C and 2D, the positions of the points e to h and l to a on the display surface of FIG. 2A are measured on the vertical axis, and the thickness direction of the liquid crystal panel 103 corresponding to the points is measured. Values are shown on the horizontal axis.

図2(F)は図2(B)、(C)、(D)、(E)の測定結果を反映したパネル反り形状の概念図である。なお、図2(F)は液晶パネルの反りを分かりやすく概念的に表した図であり、実際の変形量を正確に縮尺した図ではない。図2(F)から分かるように液晶パネル103の長辺側では表示面側から見ると奥側に凹んだ円弧状を成し、短辺側では表示面から見ると手前側に凸の円弧状を成していることが分かる。ここで点aと点eを繋いだ線分aeと長辺の円弧部頂点との距離をh1、点eと点hを繋いだ線分ehと短辺の円弧部頂点との距離をh2とする。   FIG. 2F is a conceptual diagram of a panel warp shape reflecting the measurement results of FIGS. 2B, 2C, 2D, and 2E. FIG. 2F is a diagram conceptually showing the warp of the liquid crystal panel in an easy-to-understand manner, and is not a diagram in which the actual amount of deformation is accurately scaled. As can be seen from FIG. 2F, the long side of the liquid crystal panel 103 has an arc shape that is recessed toward the back side when viewed from the display surface side, and the arc shape that is convex toward the near side when viewed from the display surface on the short side side. It can be seen that Here, the distance between the line segment ae connecting the point a and the point e and the long side arc portion vertex is h1, and the distance between the line segment eh connecting the point e and the point h and the short side arc portion vertex is h2. To do.

図2(F)に示すように、液晶パネル103は、平面を変形させた三次元曲面を成している。本実施例では、液晶パネル103を平行平面で挟み込んだ場合の平面間の空間距離をmm単位で表現した数値を「平面度」と定義する。図2(F)の場合、液晶パネル103の平面度=(h1+h2)である。   As shown in FIG. 2F, the liquid crystal panel 103 has a three-dimensional curved surface whose plane is deformed. In this embodiment, a numerical value expressing the spatial distance between planes when the liquid crystal panel 103 is sandwiched between parallel planes in mm units is defined as “flatness”. In the case of FIG. 2F, the flatness of the liquid crystal panel 103 = (h1 + h2).

図3(A)は、図2(A)の破断線K−Kにおけるパネルホルダー102、弾性部材101の断面図と、図2(B)に示した液晶パネル103の点a〜eの各点の厚さ方向の位置の測定値を示すグラフと、を重ね合わせたものを示す。図3(A)から液晶パネル103の反りを妨げないような***部102fは位置X=±X1において、***部102fの長さW、***部の高さHが得られる。それらの数値の一例として液晶パネル103の長辺側の反り量をh1≒0.5(mm)とすると、***部102fの高さH=0.3(mm)が測定値から得られた。まとめると以上のように***部102fの一例として、長さW=40(mm)、高さH=0.3(mm)が得られた。   3A is a cross-sectional view of the panel holder 102 and the elastic member 101 taken along the broken line KK in FIG. 2A, and points a to e of the liquid crystal panel 103 shown in FIG. 2B. The graph which shows the measured value of the position of the thickness direction of this, and what overlapped are shown. As shown in FIG. 3A, the protruding portion 102f that does not hinder the warping of the liquid crystal panel 103 has the length W of the protruding portion 102f and the height H of the protruding portion at the position X = ± X1. As an example of those values, when the amount of warpage on the long side of the liquid crystal panel 103 is h1≈0.5 (mm), the height H = 0.3 (mm) of the raised portion 102f is obtained from the measured value. In summary, a length W = 40 (mm) and a height H = 0.3 (mm) were obtained as an example of the raised portion 102f as described above.

図3(B)、(C)、(D)は、図3(A)の***部102fのその他の形状の例を示す。図3(B)では***部300fは全体が円弧状の凸形状、図3(C)では***部302fは全体は台形状だが肩部にRを設けた凸形状、図3(D)では***部304fは連続する複数の三角形状の凸部からなる波形状となっている。   3B, 3C, and 3D show examples of other shapes of the raised portion 102f shown in FIG. In FIG. 3 (B), the raised portion 300f has a generally arcuate convex shape, in FIG. 3 (C), the raised portion 302f has a trapezoidal shape, but has a convex shape with an R on the shoulder, and in FIG. The portion 304f has a wave shape including a plurality of continuous triangular convex portions.

(実施例2)
図4を用いて第二の実施例の一例を示す。図4(A)は、液晶パネル103を透過して見たときの、液晶パネル103の背面周縁部に「ロの字」状に配置される弾性部材401と、それよりも液晶パネル103の外周側に近い位置に弾性部材401を囲むように配置される防塵用のクッション部材402を示す。図4(B)は、図4(A)の破断線L−Lにおける断面斜視図を示す。図4(C)は、弾性部材401で液晶パネル103を支持し、さらに防塵用のクッション部材402を配した本実施例の液晶表示装置の画面に垂直な面による断面図である。
(Example 2)
An example of the second embodiment will be described with reference to FIG. FIG. 4A shows an elastic member 401 arranged in a “b” shape at the peripheral edge of the back surface of the liquid crystal panel 103 when viewed through the liquid crystal panel 103, and the outer periphery of the liquid crystal panel 103 more than that. A dustproof cushion member 402 disposed so as to surround the elastic member 401 at a position close to the side is shown. FIG. 4B is a cross-sectional perspective view taken along the broken line LL in FIG. FIG. 4C is a cross-sectional view taken along a plane perpendicular to the screen of the liquid crystal display device of this embodiment in which the liquid crystal panel 103 is supported by the elastic member 401 and the cushion member 402 for dust prevention is further provided.

図4(A)において、液晶パネル103を背面側から支える短辺弾性部材401aおよび長辺弾性部材401bは、パネルホルダー400の延伸方向と***部400fに沿って
両面テープ等で貼付けられる。本実施例において***部400fは、重力方向下側のパネルホルダー400の2ヶ所に設けられている。さらに短辺弾性部材401aおよび長辺弾性部材401bの外側を囲うように短辺クッション部材402aおよび長辺クッション部材402bが配置される。それぞれの厚さ関係は、***部400fと長辺弾性部材401bの厚さの合計値をh3、短辺クッション部材402aおよび長辺クッション部材402bの非圧縮時の厚さをh4とすると、

h3<h4・・・(3)

となるような関係で各々の寸法を決めれば良い。厚さ寸法の一例として、h3=2.3〜2.5(mm)、h4=3.0〜4.0(mm)程度が防塵性向上や液晶パネル103の表示ムラ低減の観点から好適である。次にそれぞれの圧縮荷重の関係は、

(弾性部材401bの圧縮荷重)≫(クッション部材402bの圧縮荷重)・・・(4)

となるような材質を選定すると良い。圧縮荷重の一例として、

(弾性部材401bの25%圧縮荷重)=10(kg/cm2)
(クッション部材402bの25%圧縮荷重)=0.02(kg/cm2)

程度が好適である。
4A, a short-side elastic member 401a and a long-side elastic member 401b that support the liquid crystal panel 103 from the back side are attached with a double-sided tape or the like along the extending direction of the panel holder 400 and the raised portion 400f. In this embodiment, the raised portions 400f are provided at two locations on the panel holder 400 on the lower side in the direction of gravity. Further, the short side cushion member 402a and the long side cushion member 402b are disposed so as to surround the outside of the short side elastic member 401a and the long side elastic member 401b. The respective thickness relationships are as follows: the total thickness of the raised portion 400f and the long side elastic member 401b is h3, and the uncompressed thickness of the short side cushion member 402a and the long side cushion member 402b is h4.

h3 <h4 (3)

Each dimension may be determined in such a relationship as follows. As an example of the thickness dimension, h3 = 2.3 to 2.5 (mm) and h4 = 3.0 to 4.0 (mm) are preferable from the viewpoint of improving dust resistance and reducing display unevenness of the liquid crystal panel 103. is there. Next, the relationship between each compression load is

(Compression load of elastic member 401b) >> (Compression load of cushion member 402b) (4)

It is good to select the material which becomes. As an example of compressive load,

(25% compression load of elastic member 401b) = 10 (kg / cm 2)
(25% compression load of the cushion member 402b) = 0.02 (kg / cm 2)

The degree is preferred.

(3)式および(4)式の値を選定することで、短辺クッション部材402aおよび長辺クッション部材402bの厚さをh3程度まで圧縮しつつ、液晶パネルに外的ストレスを与えずに防塵性能を高めることができる。   By selecting the values of the formulas (3) and (4), the thickness of the short side cushion member 402a and the long side cushion member 402b is compressed to about h3, and the liquid crystal panel is protected from dust without applying external stress. Performance can be increased.

以上のような弾性部材401とクッション部材402の平行配列の構造により、図4(C)に示すとおり、塵埃403が堰き止められ、液晶パネル103の表示不良を防ぐ効果が得られる。すなわち、液晶パネル103と前面フレーム104bとの隙間や駆動回路基板103b周囲の部品間の隙間から塵埃403が侵入してもクッション部材402bによって塵埃403が堰き止められる。   Due to the parallel arrangement structure of the elastic member 401 and the cushion member 402 as described above, as shown in FIG. 4C, the dust 403 is dammed and the effect of preventing the display defect of the liquid crystal panel 103 is obtained. That is, even if the dust 403 enters from the gap between the liquid crystal panel 103 and the front frame 104b or between the components around the drive circuit board 103b, the cushion member 402b blocks the dust 403.

なお、実施例2では、パネルホルダー400において、クッション部材402が設けられる部位のうち、***部400fの位置に対応する部位に***部が形成されない構成を例示した。しかし、***部400fの位置に対応する部位に***部400fと同様の***部が形成されていても良い。その場合、***部400fに対応する位置においてクッション部材402も***することになる。   In the second embodiment, the configuration in which the raised portion is not formed in the portion corresponding to the position of the raised portion 400f in the portion where the cushion member 402 is provided in the panel holder 400 is illustrated. However, a raised portion similar to the raised portion 400f may be formed at a portion corresponding to the position of the raised portion 400f. In that case, the cushion member 402 is also raised at a position corresponding to the raised portion 400f.

また、上記の実施例では、液晶表示装置の使用状態において下端支持部材に接触する液晶パネルの辺の歪みが、液晶パネルの外側ほど背面支持部材から離れるような歪みである場合を例に説明した。そのため、***部は、液晶パネルの外周部に近い位置に2個所設けられる例を説明した。しかし、液晶パネルの平面からの歪みの形状に応じて背面支持部材の一部に、液晶パネルの表示面に垂直の方向の厚みを他の部分より大きくした***部を設ける構造の液晶表示装置であれば、本発明に含まれる。例えば、図2(B)に示す液晶パネルの歪みの形状が上に凸で、点a、点eにおける歪みの量が0,点cにおける歪みの量がh1であったとすると、背面支持部材102gにおける点cに対応する部位に***部102fが設けられることになる。   In the above embodiment, the case where the distortion of the side of the liquid crystal panel that contacts the lower end support member in the use state of the liquid crystal display device is such that the outer side of the liquid crystal panel is separated from the back support member is described as an example. . Therefore, an example in which two raised portions are provided at positions close to the outer peripheral portion of the liquid crystal panel has been described. However, the liquid crystal display device has a structure in which a raised portion whose thickness in the direction perpendicular to the display surface of the liquid crystal panel is larger than that of the other portion is provided on a part of the back support member in accordance with the shape of the distortion from the plane of the liquid crystal panel. If there is, it is included in the present invention. For example, if the distortion shape of the liquid crystal panel shown in FIG. 2B is convex upward, the distortion amount at points a and e is 0, and the distortion amount at point c is h1, the back support member 102g. The raised portion 102f is provided at the site corresponding to the point c.

また、上記の実施例では、下端支持部材102eと接触する液晶パネルの辺に沿って設
けられる背面支持部材102gに***部102fを設ける例を説明したが、これは下端支持部材102eにおいて生じる引っ掛かりをより効果的に解消するためである。背面支持部材102gを設ける位置は、上記実施例のように液晶パネル103の表示領域の周囲の枠状領域の背面に対向する位置に限らない。また、***部を設ける背面支持部材gも、下端支持部材102eと接触する液晶パネルの辺に沿って設けられる背面支持部材102gに限定する必要は無い。
Further, in the above-described embodiment, the example in which the raised portion 102f is provided on the back support member 102g provided along the side of the liquid crystal panel in contact with the lower end support member 102e has been described. This is to eliminate it more effectively. The position where the back support member 102g is provided is not limited to the position facing the back of the frame-shaped area around the display area of the liquid crystal panel 103 as in the above-described embodiment. Further, the back support member g provided with the raised portions is not necessarily limited to the back support member 102g provided along the side of the liquid crystal panel in contact with the lower end support member 102e.

101 弾性部材
102a、102b、102c、102d パネルホルダー
102e 支持部
102f ***部
103 液晶パネル
101 Elastic member 102a, 102b, 102c, 102d Panel holder 102e Support part 102f Raised part 103 Liquid crystal panel

Claims (14)

表示面を有する表示パネルと、
前記表示パネルを保持するパネルホルダーと、
を有する画像表示装置であって
前記パネルホルダーは、
前記画像表示装置の使用状態において、前記表示パネルの下端を支持する第1の部材と、
前記表示パネルの前記表示面の反対側にある背面支持する第2の部材と、
を有し、
前記第1の部材は、前記表示パネルの下端の複数の領域を支持する複数の支持部を有し、
前記第2の部材は、前記複数の支持部が支持する前記表示パネルの複数の領域に対応する位置に、前記表示パネルの表示面に垂直な方向の厚みを他の部分より大きくした複数の***部を有することを特徴とする画像表示装置。
A display panel having a display surface ;
A panel holder for holding the display panel;
An image display apparatus which have a,
The panel holder is
In the use state of the image display device, a first member for supporting lifting the lower end of the display panel,
A second member for supporting a back surface on the opposite side of the display surface of the display panel;
Have
The first member has a plurality of support portions that support a plurality of regions at the lower end of the display panel;
The second member has a plurality of bulges whose thickness in the direction perpendicular to the display surface of the display panel is larger than that of other portions at positions corresponding to the plurality of regions of the display panel supported by the plurality of support portions. An image display device comprising a portion.
前記***部の厚みは、前記表示パネルの表示面に垂直な方向の歪みの量に基づいて定められることを特徴とする請求項1に記載の画像表示装置。   The image display apparatus according to claim 1, wherein the thickness of the raised portion is determined based on an amount of distortion in a direction perpendicular to the display surface of the display panel. 前記第2の部材は、前記表示パネルの辺のうち前記支持部が支持する辺に沿って設けられることを特徴とする請求項1または2に記載の画像表示装置。 3. The image display device according to claim 1, wherein the second member is provided along a side supported by the support portion among the sides of the display panel. 前記第2の部材は、前記表示パネルの背面のうち表示領域の周囲の枠状領域の背面に対向するように設けられることを特徴とする請求項1または2に記載の画像表示装置。 3. The image display device according to claim 1, wherein the second member is provided so as to face a back surface of a frame-shaped region around a display region in a back surface of the display panel. 前記第2の部材の少なくとも前記***部に、前記表示パネルの背面に少なくとも一部が当接することにより前記表示パネル背面支持する弾性部材が設けられることを特徴とする請求項1乃至請求項4のいずれか1項に記載の画像表示装置。 The elastic member which supports the back surface of the said display panel by at least one part contact | abutting to the back surface of the said display panel is provided in the said protruding part of the said 2nd member at least. 5. The image display device according to any one of 4. 前記弾性部材は、前記第2の部材の前記***部と、前記第2の部材の前記***部が設けられない部分とにわたって、設けられることを特徴とする請求項5に記載の画像表示装置
The resilient member, said raised portion of said second member, the image display apparatus according across and the said raised portions are not provided portion of the second member, to claim 5, characterized in that it is provided.
前記弾性部材は、前記表示パネルの表示面に垂直な方向の厚さが一様であることを特徴とする請求項5または請求項6に記載の画像表示装置。   The image display device according to claim 5, wherein the elastic member has a uniform thickness in a direction perpendicular to a display surface of the display panel. 前記第2の部材には、前記弾性部材よりも前記表示パネルの外周側に近い位置に、前記弾性部材と平行して、クッション部材が設けられることを特徴とする請求項5乃至請求項7のいずれか1項に記載の画像表示装置。 8. The cushion member is provided on the second member in a position closer to the outer peripheral side of the display panel than the elastic member, in parallel with the elastic member. The image display device according to any one of the above. 前記弾性部材の圧縮荷重は、前記クッション部材の圧縮荷重より大きいことを特徴とする請求項8に記載の画像表示装置。   The image display device according to claim 8, wherein a compression load of the elastic member is larger than a compression load of the cushion member. 前記表示パネルの表示面に垂直な方向の前記弾性部材の厚さは、前記クッション部材の厚さより小さいことを特徴とする請求項8または請求項9に記載の画像表示装置。   The image display device according to claim 8, wherein a thickness of the elastic member in a direction perpendicular to a display surface of the display panel is smaller than a thickness of the cushion member. 前記第2の部材における前記クッション部材が設けられる部位には、前記***部は形成されないことを特徴とする請求項8乃至請求項10のいずれか1項に記載の画像表示装置。 11. The image display device according to claim 8, wherein the raised portion is not formed in a portion of the second member where the cushion member is provided. 前記***部は、台形形状であることを特徴とする請求項1乃至請求項11のいずれか1項に記載の画像表示装置。   The image display device according to claim 1, wherein the raised portion has a trapezoidal shape. 前記複数の支持部は、所定の間隔を隔てて、前記第1の部材に設けられていることを特徴とする請求項1乃至請求項12のいずれか1項に記載の画像表示装置。 The image display device according to claim 1 , wherein the plurality of support portions are provided on the first member with a predetermined interval therebetween. 前記表示パネルのうち前記支持部が支持しない領域に対応する位置の前記第2の部材の部分の前記表示パネルの表示面に垂直な方向の厚みは、前記***部の前記表示パネルの表示面に垂直な方向の厚みよりも小さいことを特徴とする請求項1乃至請求項13のいずれか1項に記載の画像表示装置。 The display vertical direction thickness on the display surface of the panel of the portion of the second member at a position corresponding to the region where the supporting portion is not supported out of the display panel, the display surface of the display panel of the raised portion The image display device according to claim 1, wherein the image display device is smaller than a thickness in a vertical direction.
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JP2011033909A (en) * 2009-08-04 2011-02-17 Hitachi Displays Ltd Liquid crystal display device

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