JPH03203773A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPH03203773A JPH03203773A JP1343132A JP34313289A JPH03203773A JP H03203773 A JPH03203773 A JP H03203773A JP 1343132 A JP1343132 A JP 1343132A JP 34313289 A JP34313289 A JP 34313289A JP H03203773 A JPH03203773 A JP H03203773A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal panel
- panel
- display device
- crystal display
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 144
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 239000000853 adhesive Substances 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 claims description 23
- 239000004990 Smectic liquid crystal Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 abstract description 7
- 238000005192 partition Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 26
- 230000000694 effects Effects 0.000 description 9
- 230000006866 deterioration Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000009792 diffusion process Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 239000004988 Nematic liquid crystal Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000013464 silicone adhesive Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は画像を表示する液晶装置、特に強誘電性液晶表
示装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal device for displaying images, and particularly to a ferroelectric liquid crystal display device.
従来、液晶表示装置に於ける液晶パネルは第７図に示す
ような方法で固定されていた。同図に於て、７０４は液
晶が封入された液晶パネル、７０３は上偏光板、７０５
は下偏光板、７０２は液晶パネル７０４を電気的に駆動
する回路基板、７０６は液晶パネル７０４と回路基板７
０２を電気的に導通するゴムコネクタ、７０７は液晶パ
ネル７０４を照明するためのバックライト、７００は液
晶パネルを固定するフレーム、７０１は液晶パネル７０
４と回路基板７０２とバックライト７０７を結合するた
めのフレーム７００の折り曲げ部である。Conventionally, a liquid crystal panel in a liquid crystal display device has been fixed by a method as shown in FIG. In the figure, 704 is a liquid crystal panel filled with liquid crystal, 703 is an upper polarizing plate, and 705
702 is a circuit board that electrically drives the liquid crystal panel 704; 706 is the liquid crystal panel 704 and the circuit board 7;
707 is a backlight for illuminating the liquid crystal panel 704, 700 is a frame for fixing the liquid crystal panel, and 701 is a liquid crystal panel 70.
4, a circuit board 702, and a backlight 707 are bent.
しかし、」１記従来例の液晶パネル固定法はネマチック
液晶パネルに関するものであり、強誘電性液晶パネルを
同様の方法で固定した場合には以下に述べる種々の問題
点がある。すなわち、第７図に示すような方法で強誘電
性液晶パネルを固定した場合、
（１）液晶パネルを固定する際、少なからず液晶パネル
に歪が与えられるため強誘電性液晶の配向が変化して画
質の劣化を起こす。However, the conventional liquid crystal panel fixing method described in Section 1 relates to a nematic liquid crystal panel, and when a ferroelectric liquid crystal panel is fixed by the same method, there are various problems described below. In other words, when a ferroelectric liquid crystal panel is fixed using the method shown in Figure 7, (1) When the liquid crystal panel is fixed, the orientation of the ferroelectric liquid crystal changes due to the fact that considerable strain is applied to the liquid crystal panel. This may cause deterioration in image quality.
（２）ネマチック液晶に比較して、はるかに小さな衝撃
や振動でもそれが液晶パネルへ伝達されると配向性が変
化して画質の劣化を起こす。(2) Compared to nematic liquid crystals, even a much smaller shock or vibration is transmitted to the liquid crystal panel, causing a change in orientation and deterioration of image quality.
そこで本発明者らは第８図に示すような方法を先に提案
した（特願昭６３−２４２５７７号）。Therefore, the present inventors previously proposed a method as shown in FIG. 8 (Japanese Patent Application No. 63-242577).
同図に於て８０５は画像表示用の液晶パネル、８０２は
液晶パネル８０５を電気的に駆動するための回路基板、
８０３は液晶パネル８０５と回路基板８０２を電気的に
接続するためのフレキソプルなプリント配線フィルム、
８０１は液晶パネル８０５と回路基板８０２を支持する
ための充分な剛性を備えた筐体で、例えば金属ブロック
あるいは金属ダイキャストが使用される。８０６は液晶
パネル８０５を固定するための接着剤、８０４は回路基
板８０２と筺体８０１との間を電気的絶縁するための絶
縁板、８０７は液晶パネル８０５を照明するためのバッ
クライトで、前面に散乱拡散光を得るための拡散板８０
８が設けられている。In the figure, 805 is a liquid crystal panel for displaying images, 802 is a circuit board for electrically driving the liquid crystal panel 805,
803 is a flexible printed wiring film for electrically connecting the liquid crystal panel 805 and the circuit board 802;
A housing 801 has sufficient rigidity to support the liquid crystal panel 805 and the circuit board 802, and is made of, for example, a metal block or metal die-casting. 806 is an adhesive for fixing the liquid crystal panel 805; 804 is an insulating plate for electrically insulating between the circuit board 802 and the housing 801; 807 is a backlight for illuminating the liquid crystal panel 805; Diffusion plate 80 for obtaining scattered diffused light
8 is provided.
本方法によれば、機械的な外部負荷に対して液晶パネル
８０５に歪を与えに（い金属筺体８０１を用いたため、
液晶パネル８０５を安定した状態で確実に保持すること
ができ、固定後は外力による配向の変化及び画質の劣化
を防止することが可能となった。According to this method, since the metal casing 801 is used to apply distortion to the liquid crystal panel 805 against mechanical external loads,
It is possible to reliably hold the liquid crystal panel 805 in a stable state, and after fixation, it is possible to prevent changes in orientation and deterioration of image quality due to external forces.
しかしながら、上記従来例では金属筐体を用いたため静
的な外力による機械的変形に対しては効果が大きいが、
液晶表示装置が衝撃、振動などの動的外部負荷を受けた
時には次の様な問題があった。すなわち、第８図に於て
液晶パネル８０５はその下面周辺部を筐体８０１上に接
着剤８０６を用いて固定されているために、＋Ｚ力方向
衝撃を受けると液晶パネル８０５は周辺部を支点とじて
中央部が＋Ｚ力方向変位し液晶パネル８０５に曲げ変形
が生じる。従って液晶パネルのサイズが大型化すると曲
げ変形が大きくなり変形量が所定の値を越えると配向が
変化して画質が劣化するという問題があった。そこで液
晶パネル８０５の曲げ変位を小さ（するために、液晶パ
ネル８０５をハックライＩ−８０７−ｈの拡散板８０８
の上面に直かに面接触させて曲げ変位を抑えることが考
えられるが、この場合は液晶パネルの固定後に行なう歪
除去のための配向制御の熱処理で問題が生ずる。すなわ
ち、強誘電性液晶にはネマチック液晶に比較して、はる
かに小さな機械的ストレスで配向性が変化するため、液
晶パネル取付後に液晶パネルを強誘電性を示すカイラル
スメクチックＣ相よりも高い１ｌ１１！度まで加熱して
、その後カイラルスメクチックＣ相の所定の温度まで徐
冷することによる配向制御処理（以下、再配向処理と称
す）を行なう必要がある。この時、第８図に於てバック
ライト８０７及び拡散板８０８は通常、プラスデック製
であり、それらの熱膨張係数は液晶パネル８０５と比べ
てかなり大きいため、それらが液晶パネル８０５と接触
していると加熱ピーク時に液晶パネル８０５はバックラ
イト８０７及び拡散板８０８から大きな曲げ変形力を受
ける。加熱ピーク時と徐冷後とで液晶パネルの状態が異
なると、再配向処理を行なっても強誘電性液晶は均一な
層構造とならず、従って液晶パネルの配向制御ができな
（なるという問題があった。However, since the conventional example above uses a metal casing, it is highly effective against mechanical deformation caused by static external forces;
When liquid crystal display devices are subjected to dynamic external loads such as shocks and vibrations, the following problems occur. In other words, in FIG. 8, since the liquid crystal panel 805 has its lower peripheral portion fixed on the housing 801 using adhesive 806, when it receives an impact in the +Z force direction, the liquid crystal panel 805 uses its peripheral portion as a fulcrum. As a result, the central portion is displaced in the +Z force direction and bending deformation occurs in the liquid crystal panel 805. Therefore, as the size of the liquid crystal panel increases, the bending deformation increases, and when the amount of deformation exceeds a predetermined value, the orientation changes and the image quality deteriorates. Therefore, in order to reduce the bending displacement of the liquid crystal panel 805,
It is conceivable to suppress the bending displacement by bringing the liquid crystal panel into direct surface contact with the upper surface of the liquid crystal panel, but in this case, a problem arises in the heat treatment for alignment control to remove distortion, which is performed after fixing the liquid crystal panel. In other words, since the orientation of ferroelectric liquid crystals changes with a much smaller mechanical stress than that of nematic liquid crystals, the 1l11! It is necessary to perform an orientation control treatment (hereinafter referred to as a reorientation treatment) by heating the substrate to a temperature of 50°C and then slowly cooling it to a predetermined temperature of the chiral smectic C phase. At this time, in FIG. 8, the backlight 807 and the diffuser plate 808 are usually made of Plus Deck, and their coefficient of thermal expansion is considerably larger than that of the liquid crystal panel 805, so they may come into contact with the liquid crystal panel 805. In this case, the liquid crystal panel 805 receives a large bending deformation force from the backlight 807 and the diffusion plate 808 at the peak of heating. If the state of the liquid crystal panel differs between the heating peak and after slow cooling, the ferroelectric liquid crystal will not have a uniform layer structure even after reorientation treatment, and therefore the orientation of the liquid crystal panel cannot be controlled. was there.
さらに、金属筐体を使用しているため、プラスチックと
比べてコストが高く、重量も大きいという欠点があった
。Furthermore, since it uses a metal casing, it has the drawbacks of being higher in cost and heavier than a plastic casing.
本発明によれば上述の問題を解決するため、液晶パネル
の固定構造として、弾性部材により液晶パネルを筐体の
開口部内に宙吊りに支持し、その下方の空間が略密閉構
造であることを特徴としている。According to the present invention, in order to solve the above-mentioned problem, the liquid crystal panel is fixed in a structure in which the liquid crystal panel is suspended in the opening of the casing by an elastic member, and the space below is a substantially sealed structure. It is said that
従って本発明によれば、液晶表示装置が落下衝撃等の動
的外部負荷を受けた時、液晶パネルはエアーダンパの作
用により曲げ変形を軽減でき、配向の変化及び画質の劣
化を防止することができる。Therefore, according to the present invention, when a liquid crystal display device is subjected to a dynamic external load such as a drop impact, the liquid crystal panel can reduce bending deformation by the action of the air damper, thereby preventing changes in orientation and deterioration of image quality. can.
以−ド、図面により本発明の詳細な説明する。 The present invention will now be described in detail with reference to the drawings.
第１図は本発明の第１の実施例に係る液晶表示装置の断
面図である。図に於て、１００は２枚の対向するカラス
基板１０１，１０２の間に液晶（図示せず）を挟持した
液晶パネル、１０３は上偏光板、１０４は下偏光板、１
０６は液晶パネル１００を駆動するための回路基板、１
０５は回路１１（板１０６と液晶パネル１００を電気的
に接続するためのフレキシブルなプリント配線フィルム
である。１０７は液晶パネル１００を支持するためのカ
ラスからなるパネル支持基板で、液晶パネル１００の下
面周辺部全周にわたってゴム系の接着剤１１４が塗布さ
れ液晶パネル１００を支持固定している。１０８は液晶
パネル１００ 、パネル支持基板１０７及び回路基板１
０６を固定支持するための例えばプラスチックからなる
筐体であり、パネル支持基板１０７の端部と筐体の開口
窓部１０８−１の間に例えばゴム系のシリコン接着剤か
らなる弾性部材１１５が充填されている。FIG. 1 is a sectional view of a liquid crystal display device according to a first embodiment of the present invention. In the figure, 100 is a liquid crystal panel in which a liquid crystal (not shown) is sandwiched between two opposing glass substrates 101 and 102, 103 is an upper polarizing plate, 104 is a lower polarizing plate, 1
06 is a circuit board for driving the liquid crystal panel 100, 1
05 is a flexible printed wiring film for electrically connecting the circuit 11 (board 106 and the liquid crystal panel 100); 107 is a panel support substrate made of a glass for supporting the liquid crystal panel 100; A rubber adhesive 114 is applied all around the periphery to support and fix the liquid crystal panel 100. Reference numeral 108 indicates the liquid crystal panel 100, the panel support substrate 107, and the circuit board 1.
06, and an elastic member 115 made of, for example, rubber-based silicone adhesive is filled between the end of the panel support substrate 107 and the opening window 108-1 of the housing. has been done.
１０９は液晶パネル１００を照明するためのバックライ
ト、１１０はバックライト１０９からの照射光を散乱拡
散光にするための拡散板で、バックライト１０９の内部
のランプや反射板等は図示しない。１１８は下面を拡散
板１１０に支持され、上面周辺部が筐体開口窓部１０８
−１に当接された、例えばカラスからなる仕切板である
。仕切板１１８はバックライト１０９及び拡散板１１０
に支持されているため＋Ｚ力方向は変位を生じない。１
１７はパネル支持基板１０７、筐体開口窓部１０８−３
仕切板１１８及び弾性部材１１５で周囲を囲まれた略密
閉空間て、筺体１０８に設けられた小孔１１６を介して
外気に通じている。Reference numeral 109 is a backlight for illuminating the liquid crystal panel 100, and reference numeral 110 is a diffusion plate for converting the irradiated light from the backlight 109 into scattered and diffused light.The lamps, reflectors, etc. inside the backlight 109 are not shown. 118 is supported by the diffusion plate 110 on the lower surface, and the upper surface periphery is the housing opening window 108
-1 is a partition plate made of crow, for example. The partition plate 118 includes a backlight 109 and a diffusion plate 110.
Since it is supported by , no displacement occurs in the +Z force direction. 1
17 is a panel support board 107 and a housing opening window 108-3
A substantially sealed space surrounded by a partition plate 118 and an elastic member 115 communicates with the outside air through a small hole 116 provided in the housing 108 .
１１１は液晶パネル１００を保護するための保護ガラス
で、上カバー１１２の開口窓部に固定されており、１１
３はバックライト１０９及び筐体１０８の底面を被う下
カバーである。上カバー１１２と下カバー１１３はネジ
（図示せず）で結合され、ノイズ低減のためともに回路
基板１０６のアース電位に接続されている。111 is a protective glass for protecting the liquid crystal panel 100, which is fixed to the opening window of the upper cover 112;
3 is a lower cover that covers the backlight 109 and the bottom surface of the housing 108. The upper cover 112 and the lower cover 113 are coupled with screws (not shown), and both are connected to the ground potential of the circuit board 106 for noise reduction.
次に、この第１の実施例の特徴について述べるが、まず
、画質劣化の原因となる液晶の配向劣化について説明す
る。第２図−（１）は液晶パネル２００の断面を模式的
に拡大したものである。同図に於て２０１は強誘電性液
晶、２０２及び２０３は強誘電性液晶２０１を両面から
間隙約１．４μｍで保持するだめの厚さ１．１ｍｍのガ
ラス基板、２０４及び２０５は強誘電性液晶２０１を駆
動するための膜厚約１５００人のＩＴＯ（Ｉｒｚ ０３
−３ｎＯｚ ）電極膜、２０６及び２（）７は強誘電性
液晶２０１の配向性を保つための膜厚約１００へのポリ
イミド配向膜で、強誘電性液晶２０１は中央部が折れ曲
がった規則的な層構造を形成している。Next, the features of this first embodiment will be described, but first, the alignment deterioration of the liquid crystal, which is a cause of image quality deterioration, will be explained. FIG. 2-(1) is a schematic enlarged view of the cross section of the liquid crystal panel 200. In the figure, 201 is a ferroelectric liquid crystal, 202 and 203 are glass substrates with a thickness of 1.1 mm that hold the ferroelectric liquid crystal 201 from both sides with a gap of about 1.4 μm, and 204 and 205 are ferroelectric liquid crystals. ITO (Irz 03) with a film thickness of about 1500 to drive the liquid crystal 201
-3nOz) The electrode films 206 and 2()7 are polyimide alignment films with a thickness of approximately 100 mm to maintain the alignment of the ferroelectric liquid crystal 201. Forms a layered structure.
次に液晶パネル２００が＋Ｚ力方向機械的外力を受ける
と液晶パネル２００は変形し、所定の値以−トの変形を
受けると第２図−（２）に示すように強誘電性液晶２０
１の層構造が崩れ、サンデッドテクスチャーのような配
向欠陥を生じる。この以態て画像を表示すると、強誘電
性液晶２０１の規則的なスイッチングが損なわれ、良好
な画質が得られなくなる。実際の液晶パネル支持形態に
於ては、液晶層構造の崩れを伴うような液晶パネルの変
形は局所的な曲げ変形として現われ易い。つまり一様な
曲げ変形を受けている領域では局所的曲げ変形の領域よ
りも液晶の層構造は崩れに（い。第３図は第８図に示す
従来の液晶表示装置が＋Ｚ力方向落下衝撃を受けた時の
液晶パネル８０５の曲げ変形状態を表わしたものである
。図中、第８図と同一の符合は同一の部材を表わしてい
る。液晶パネル８０５は初期状態と比べて中央部ＣがＺ
方向に最も太き（変位し、接着剤８０６の直上部Ａは支
点となって変位を生じない。液晶パネル８０５の全領域
に於て、最も急激に単位面積あたりの曲げ変形量が太き
（なる（曲率半径が小さい）のはＢ部近傍であり、この
部分にサンデッドテクスチャーの如き配向欠陥が現われ
る。Next, when the liquid crystal panel 200 receives a mechanical external force in the +Z force direction, the liquid crystal panel 200 deforms, and when the liquid crystal panel 200 is deformed beyond a predetermined value, the ferroelectric liquid crystal 200 changes as shown in FIG. 2-(2).
The layer structure of No. 1 collapses, resulting in orientation defects such as sanded texture. If an image is displayed in this manner, the regular switching of the ferroelectric liquid crystal 201 will be impaired, making it impossible to obtain good image quality. In actual liquid crystal panel support configurations, deformation of the liquid crystal panel accompanied by collapse of the liquid crystal layer structure tends to appear as local bending deformation. In other words, the layer structure of the liquid crystal is more likely to collapse in a region undergoing uniform bending deformation than in a region undergoing local bending deformation. This figure shows the bending deformation state of the liquid crystal panel 805 when the liquid crystal panel 805 is subjected to the bending deformation. In the figure, the same reference numerals as in FIG. is Z
The area A directly above the adhesive 806 serves as a fulcrum and does not cause any displacement. In the entire area of the liquid crystal panel 805, the amount of bending deformation per unit area becomes thickest ( (the radius of curvature is small) is near part B, and orientation defects such as sanded texture appear in this part.
また、このような液晶パネル支持形態では、液晶パネル
のサイズが大型化するにつれて局所的曲げ変形も大きく
なり耐衝撃性能がさらに低下する。In addition, in such a liquid crystal panel support mode, as the size of the liquid crystal panel increases, local bending deformation also increases, further reducing impact resistance.
しかしながら、本発明の実施例に於ては弾性部材を用い
て液晶パネルを筐体の開口窓部内に宙吊りに支持し、そ
の下方の空間が略密閉構造であるため、液晶パネルは衝
撃を受けてもエアーダンパの作用により、曲げ変形量が
極めて小さく抑えられ、サンデッドテクスチャーの如き
配向欠陥の発生を防止することが可能となる。第４図は
本実施例の液晶表示装置６が＋Ｚ力方向落下衝撃を受け
た時の液晶パネル１００の曲げ変形状態の特徴を表わす
ため、弾性部材１１５に支持されたパネル支持基板１０
７の状態を模式的に表わしたものである。液晶パネル１
００は接着剤１１４でパネル支持基板１０７に固定され
ているため、パネル支持基板１０７の変形にほぼ追従す
る。However, in the embodiments of the present invention, the liquid crystal panel is suspended in the opening window of the housing using an elastic member, and the space below the elastic member has a substantially sealed structure, so that the liquid crystal panel is not subjected to impact. Also, due to the action of the air damper, the amount of bending deformation is suppressed to an extremely small amount, making it possible to prevent orientation defects such as sanded texture from occurring. FIG. 4 shows the characteristics of the bending deformation state of the liquid crystal panel 100 when the liquid crystal display device 6 of this embodiment is subjected to a drop impact in the +Z force direction.
This is a schematic representation of state No. 7. LCD panel 1
Since 00 is fixed to the panel support substrate 107 with the adhesive 114, it almost follows the deformation of the panel support substrate 107.
まず、第４図−（１）は第１図の実施例の液晶表示装置
からバックライトｌＯ９，拡散板１１０及び仕切板１１
８を取除き、略密閉空間１１７が存在しない状態で」〜
Ｚ力方向落下衝撃を与えた時のパネル支持ノ、（板１０
７の曲げ変形状態を表わしている。尚、」ニカハー１１
２．下カバー１１３及び保護ガラス１１１も取除いであ
る。この時、弾性部材１１５が＋Ｚ力方向太き（変位し
、パネル支持基板１０７は一様に大きな曲げ変形を生ず
る。First, FIG. 4-(1) shows the backlight lO9, the diffuser plate 110, and the partition plate 11 from the liquid crystal display device of the embodiment of FIG.
8 is removed and the substantially closed space 117 does not exist.''
Panel support when subjected to a fall impact in the Z force direction (Plate 10
7 represents the bending deformation state. Furthermore,” Nikahah 11
2. The lower cover 113 and protective glass 111 are also removed. At this time, the elastic member 115 becomes thicker (displaced) in the +Z force direction, and the panel support substrate 107 uniformly undergoes large bending deformation.
次に第４図−（２）は本実施例の液晶表示装置が＋Ｚ力
方向落下衝撃を受けた時のパネル支持基板１０７の状態
を表わしている。この場合は略密閉空間１１７がエアー
ダンパとしてパネル支持基板１０７に均等に作用するた
め、パネル支持基板の曲げ変形量は小さく、従って液晶
パネル１０（）の曲げ変形量も小さく耐衝撃性能が向」
ニする。Next, FIG. 4-(2) shows the state of the panel support substrate 107 when the liquid crystal display device of this embodiment is subjected to a drop impact in the +Z force direction. In this case, since the substantially sealed space 117 acts uniformly on the panel support substrate 107 as an air damper, the amount of bending deformation of the panel support substrate is small, and therefore the amount of bending deformation of the liquid crystal panel 10() is also small and the impact resistance is improved.
d.
第５図はエアーダンパの効果を示すため、第４図−（１
）、（２）各々の状態について液晶パネルの曲げ変形量
と落丁衝撃値の関係を表わした特性図である。この時用
いた液晶パネルのサイズは縦３００ｍｍ１横２５０ｍｍ
、厚さ１．１ｍｍＸ２、パネル支持基板の大きさは液晶
パネルサイズとほぼ等しい。ここでは便宜上、曲げ変形
量を表わすパラメーターとして、パネル支持基板端部の
ａ点及び中央部す点の初期状態からの＋Ｚ力方向の変位
■をそれぞれＡ、Ｂとし、Ｘ＝Ｂ−Ａを用いる。図中・
印はサンデッドテクスチャーの出現を表わし、○印は欠
陥が発生せず良好な画像が得られたことを表わしている
。第５図よりＸ２．５ｍｍ以上て配向欠陥が発生してい
るが、本実施例ではエアーダンパの作用によって液晶パ
ネルの曲げ変形量が小さ（抑えられるため、耐衝撃性が
大きく向」−できたことが判る。Figure 5 shows the effect of the air damper in Figure 4-(1
), (2) are characteristic diagrams showing the relationship between the amount of bending deformation of the liquid crystal panel and the falling impact value for each state. The size of the liquid crystal panel used at this time was 300 mm in length and 250 mm in width.
, thickness 1.1 mm x 2, the size of the panel support substrate is almost equal to the liquid crystal panel size. For convenience, here, as a parameter representing the amount of bending deformation, the displacement ■ in the +Z force direction from the initial state at point a and point at the center of the panel support substrate are respectively A and B, and X=B-A is used. . In the diagram・
The mark indicates the appearance of a sanded texture, and the mark ○ indicates that a good image was obtained without any defects. As shown in Fig. 5, alignment defects occur at X2.5 mm or more, but in this example, the amount of bending deformation of the liquid crystal panel is small (suppressed) due to the action of the air damper, so the impact resistance is greatly improved. I understand that.
以上述べた様に本実施例に於ける略密閉空間１１７はエ
アーダンパ作用を得るために必須のものであるが、必ず
しも完全な密閉状態である必要はなく、小さな空気逃げ
穴か隙間が存在しても上述のエアーダンパ作用が得られ
ている。これは落下ｉφｉ撃時の作用時間が通常６ ＝
］ ｌ ｍ ｓ ｅ ｃと非常に短時間であることに
よる。むしろ好ましい形態では以下に述べる理由から、
完全密閉空間よりも小孔等の空気逃げ穴があった方が良
い。すなわち、液晶表示装置が飛行機等で空輸される場
合、かなりの減圧状態にさらされるため、完全密閉空間
では内部の空気が著しく膨張して液晶パネルに大きな曲
げ変形を与えることが考えられる。また、本実施例の液
晶表示装置に於ける小孔は、曲げ変形パラメーターＸが
、Ｘ＜２．５ｍｍを満足できる範囲内で、小孔の大きさ
９位置、形状１個数等を任意に設定することができ、必
ずしも筐体に設ける必要はなく、例えばバックライト側
へ設けても長い。液晶パネルのサイズが異なる場合でも
、エアーダンパ作用を有する範囲で小孔を自由に設定し
て良い。As described above, the substantially sealed space 117 in this embodiment is essential to obtain an air damper effect, but it does not necessarily have to be in a completely sealed state, and there may be a small air escape hole or gap. However, the above-mentioned air damper effect can be obtained. This is because the action time when falling iφi is normally 6 =
] lmsec, which is a very short time. Rather, in a preferred form, for the reasons described below,
It is better to have air escape holes such as small holes than to have a completely sealed space. That is, when a liquid crystal display device is transported by airplane or the like, it is exposed to a considerably reduced pressure, so that in a completely sealed space, the air inside expands significantly, which may cause large bending deformation to the liquid crystal panel. In addition, the small holes in the liquid crystal display device of this example can be arbitrarily set in size, shape, number of holes, etc. within the range where the bending deformation parameter X satisfies X<2.5 mm. It is not necessarily necessary to provide it on the housing, and for example, it can be provided on the backlight side for a long time. Even if the liquid crystal panels have different sizes, the small holes may be freely set within the range that has an air damper effect.
以−には略密閉空間１１７のエアーダンパとしての作用
を」Ｚ方向の落下衝撃について説明したが、略密閉空間
１１７はその性質上−Ｚ方向の落下ｉΦｉ撃についても
有効である。すなわち−Ｚ力方向液晶パネル１００が衝
撃を受けて変位する際も、略密閉空間１１７は膨張を抑
えるため液晶パネル全面に亙って均等に液晶パネルの曲
げ変位を抑える働きをする。従って、本発明の液晶表示
装置は、強誘電性液晶パネルの耐衝撃性が最も弱い±Ｚ
力方向落下衝撃に対して有効であるばがりでなく、振動
に対しても同様の効果を有している。Hereinafter, the function of the substantially sealed space 117 as an air damper has been described with respect to a fall impact in the Z direction, but due to its nature, the substantially sealed space 117 is also effective against a fall impact in the -Z direction. That is, even when the -Z force direction liquid crystal panel 100 is displaced due to impact, the substantially sealed space 117 functions to suppress the bending displacement of the liquid crystal panel uniformly over the entire surface of the liquid crystal panel in order to suppress expansion. Therefore, the liquid crystal display device of the present invention has the weakest impact resistance of the ferroelectric liquid crystal panel ±Z.
It is not only effective against force direction drop impact, but also has a similar effect against vibration.
さらに本発明は、その構成上液晶パネル１００を筺体１
０８の上面に支持固定する必要がないため、液晶パネル
の配向劣化に対する筺体１０８の機械的強度依存は従来
例はど大きくない。また、既に説明した再配向処理時に
液晶パネルが曲げ変形力を受けることもない。従って金
属筐体よりも剛性の小さいプラスチック製筐体を使用す
ることが可能となる。また、従来例第８図の絶縁板８０
４も本実施例では不要である。また、本実施例では弾性
部材１１５としてゴム系のシリコン接着剤を用いたが、
これに限定されず、弾性を有する他のゴム部材を用いて
も良い。Further, in the present invention, the liquid crystal panel 100 is arranged in the housing 1 due to its structure.
Since there is no need to support and fix the housing 108 on the upper surface of the housing 108, the dependence of the mechanical strength of the housing 108 on the alignment deterioration of the liquid crystal panel is not very large in the conventional example. Furthermore, the liquid crystal panel is not subjected to bending deformation force during the reorientation process described above. Therefore, it is possible to use a plastic casing that is less rigid than a metal casing. Furthermore, the insulating plate 80 of the conventional example shown in FIG.
4 is also unnecessary in this embodiment. Furthermore, in this embodiment, a rubber-based silicone adhesive was used as the elastic member 115; however,
The present invention is not limited to this, and other elastic rubber members may be used.
第６図は本発明の第２の実施例を示す。図中、第１図と
同一の符号を付した部材は第１図と共通の部材である。FIG. 6 shows a second embodiment of the invention. In the figure, members with the same reference numerals as in FIG. 1 are the same members as in FIG. 1.
本実施例に於ては、弾性部材６０１が液晶パネル１００
の下面周辺部に直かに接して液晶パネル１００を支持し
ている。また拡散板１１０が第１図の支切板１１８の機
能を果している。この時、拡散板１１０はＺ方向に変位
しないようにバックライト６０２に支持されている。さ
らにバックライト６０２は第１の実施例の筐体１０８と
一体的にプラスチックで形成されている。６０３は、液
晶パネル１００．バックライトの開口窓部６０２−１．
拡散板１１０及び弾性部材６０１によって囲まれた略密
閉空間である。In this embodiment, the elastic member 601 is attached to the liquid crystal panel 100.
The liquid crystal panel 100 is supported in direct contact with the periphery of the lower surface. Further, the diffuser plate 110 functions as the dividing plate 118 in FIG. At this time, the diffuser plate 110 is supported by the backlight 602 so as not to be displaced in the Z direction. Furthermore, the backlight 602 is integrally formed of plastic with the housing 108 of the first embodiment. 603 is a liquid crystal panel 100. Backlight opening window 602-1.
It is a substantially sealed space surrounded by the diffusion plate 110 and the elastic member 601.
以上の構成に於ても第１の実施例と同様な効果を得るこ
とができる。このように第１図のパネル支持基板１０７
、仕切板１１８及び筺体１０８を除去あるいは他部材と
一体化させることによって部品点数の削減が可能となっ
てコストダウンになるばかりでなく、液晶表示装置の薄
型化および重量を軽減することが可能である。Even with the above configuration, the same effects as in the first embodiment can be obtained. In this way, the panel support substrate 107 in FIG.
By removing the partition plate 118 and the housing 108 or integrating them with other members, it is possible to reduce the number of parts, which not only reduces costs, but also makes it possible to make the liquid crystal display device thinner and lighter. be.
以上は強誘電性液晶について主に耐衝撃性能の向上を説
明したが、本実施例の液晶パネル支持構造はネマチック
液晶についても有用であることはいうまでもない。また
、本実施例は透過型の液晶表示装置に限定されるもので
はなく、反射型の液晶表示装置についても有用である。Although the above description has mainly focused on improving the impact resistance of ferroelectric liquid crystals, it goes without saying that the liquid crystal panel support structure of this embodiment is also useful for nematic liquid crystals. Further, this embodiment is not limited to a transmissive type liquid crystal display device, but is also useful for a reflective type liquid crystal display device.
この場合は、第６図のバックライト６０２が照明機能を
有さない支持部材となる。In this case, the backlight 602 in FIG. 6 becomes a support member that does not have a lighting function.
以上説明したように、本発明によれば、（１）液晶パネ
ルを宙吊りに固定し、エアーダンパ作用を利用できるた
め、液晶表示装置の輸送時や使用時に発生する機械的外
力、落下衝撃及び振動に対して液晶パネルの配向劣化を
防止することができ、強誘電性液晶を用いた液晶表示装
置の信頼性を飛躍的に向上することができる。As explained above, according to the present invention, (1) the liquid crystal panel can be fixed in the air and the air damper effect can be used, so that the mechanical external force, drop impact, and vibration that occur during transportation or use of the liquid crystal display device can be avoided. On the other hand, alignment deterioration of the liquid crystal panel can be prevented, and the reliability of a liquid crystal display device using ferroelectric liquid crystal can be dramatically improved.
（２）特に、大版サイズの強誘電性液晶パネルの実用化
に有効である。(2) It is particularly effective for the practical application of large-sized ferroelectric liquid crystal panels.
（３）液晶パネルを宙吊りに固定した構造のため、液晶
パネル組立時に於ける機械的な外部負荷による液晶パネ
ルの変形を最小限にとどめることができ、確実に強誘電
性液晶パネルを固定できる。(3) Due to the structure in which the liquid crystal panel is suspended and fixed in the air, deformation of the liquid crystal panel due to mechanical external loads during assembly of the liquid crystal panel can be minimized, and the ferroelectric liquid crystal panel can be securely fixed.
（４）プラスチック筐体あるいは非金属筐体が使用でき
るため、コストダウン及び軽量化の効果が大きい。(4) Since a plastic casing or a non-metallic casing can be used, cost reduction and weight reduction are significant.
（５）液晶表示装置を使用中に、何らかの異常で液晶パ
ネルの画質が劣化した場合、液晶パネルが筐体に組み付
けられたままの状態で再配向処理をすることが可能とな
り、装置の保守性向−にが５１れる等の効果が得られる
。(5) If the image quality of the LCD panel deteriorates due to some abnormality while using the LCD device, it is possible to perform reorientation processing while the LCD panel is still assembled in the housing, making it easier to maintain the device. -Effects such as 51 nits being removed can be obtained.
第１図は本発明の液晶表示装置の断面図、第２図は強誘
電性液晶パネルの層構造の変化を示す拡大断面図、
第３図は従来の液晶表示装置が落下衝撃を受けた時の液
晶パネルの変形状態を示す断面図、第４図は本発明の液
晶表示装置が落下ｉΦｉ繋を受けた時の液晶パネルの変
形状態の特徴を示す断面図、
第５図はエアーダンパ作用の効果を示す特性図、
第６図は本発明の第２の実施例を示す液晶表示装置の断
面図、
第７図及び第８図は従来の液晶表示装置の断面図である
。
００
０３
０４
０６
０７
０８
０９
１０
１１
１２
１３
１５
１１６；小孔
１１７；略密閉空間
１１８、仕切板
２０１；強誘電性液晶
６０１；弾性部材
６０２；バックライト
６０３；略密閉空間
７００フレーム
７０２；回路基板
７０６ ； 導電ゴムコネクタ
８０１；筐体
８０６ 、接着剤
；液晶パネル
；上偏光板
；下偏光板
；回路基板
、パネル支持基板
；筐体
；バックライト
；拡散板
；保護ガラス
；上カバー
；下カバー
；弾性部材
十ｚ方向の衡撃力０遂ノ（（ｑ）
賞４図
（２）Figure 1 is a cross-sectional view of the liquid crystal display device of the present invention, Figure 2 is an enlarged cross-sectional view showing changes in the layer structure of a ferroelectric liquid crystal panel, and Figure 3 is when a conventional liquid crystal display device is subjected to a drop impact. FIG. 4 is a cross-sectional view showing the deformed state of the liquid crystal panel when the liquid crystal display device of the present invention is subjected to a fall, and FIG. A characteristic diagram showing the effect. FIG. 6 is a sectional view of a liquid crystal display device showing a second embodiment of the present invention. FIGS. 7 and 8 are sectional views of a conventional liquid crystal display device. 00 03 04 06 07 08 09 10 11 12 13 15 116; small hole 117; substantially sealed space 118, partition plate 201; ferroelectric liquid crystal 601; elastic member 602; backlight 603; substantially sealed space 700 frame 702; circuit board 706; conductive rubber connector 801; housing 806, adhesive; liquid crystal panel; upper polarizing plate; lower polarizing plate; circuit board, panel support board; housing; backlight; diffuser plate; protective glass; upper cover; lower cover; The elastic member has an equal impact force of 0 in the z direction ((q) Figure 4 (2)
Claims (14)
した液晶とを有する液晶パネル、ｂ、該液晶パネルを支
持する支持部材及び、 ｃ、該液晶パネルを該支持部材の開口部に宙吊りに固定
する弾性部材 を有し、該液晶パネル、該支持部材および該弾性部材と
で囲まれた空間が略密閉空間であることを特徴とする液
晶表示装置。(1) a. A liquid crystal panel having a pair of substrates provided with electrodes and a liquid crystal disposed between the substrates; b. A support member for supporting the liquid crystal panel; and c. An opening in the support member for supporting the liquid crystal panel. 1. A liquid crystal display device comprising an elastic member fixed in a suspended manner to a portion thereof, and a space surrounded by the liquid crystal panel, the support member, and the elastic member is a substantially sealed space.
バックライトを備え、前記液晶パネル、前記支持部材、
前記弾性部材及び該バックライトで囲まれた空間が略密
閉空間であることを特徴とする請求項第１項記載の液晶
表示装置。(2) A backlight that illuminates the liquid crystal panel is provided at a lower part of the support member, and the liquid crystal panel, the support member,
2. The liquid crystal display device according to claim 1, wherein a space surrounded by the elastic member and the backlight is a substantially closed space.
徴とする請求項第１項記載の液晶表示装置。(3) The liquid crystal display device according to claim 1, wherein the support member has an air escape portion.
する請求項第１項記載の液晶表示装置。(4) The liquid crystal display device according to claim 1, wherein the supporting member is made of plastic.
とする請求項第１項記載の液晶表示装置。(5) The liquid crystal display device according to claim 1, wherein the elastic member is a rubber adhesive.
請求項第１項記載の液晶表示装置。(6) The liquid crystal display device according to claim 1, wherein the liquid crystal is a ferroelectric liquid crystal.
あることを特徴とする請求項第１項記載の液晶表示装置
。(7) The liquid crystal display device according to claim 1, wherein the ferroelectric liquid crystal is a chiral smectic liquid crystal.
した液晶とを有する液晶パネル、ｂ、該液晶パネルを支
持するパネル支持基板、 ｃ、該パネル支持基板を支持する支持部材及び ｄ、該パネル支持基板を該支持部材の開口部に宙吊りに
固定する弾性部材 を有し、該パネル支持基板、該支持部材及び該弾性部材
とで囲まれた空間が略密閉空間であることを特徴とする
液晶表示装置。(8) a. A liquid crystal panel having a pair of substrates provided with electrodes and a liquid crystal disposed between the substrates; b. A panel support substrate for supporting the liquid crystal panel; c. A support member for supporting the panel support substrate. and d, having an elastic member that suspends and fixes the panel support substrate in the opening of the support member, and the space surrounded by the panel support substrate, the support member, and the elastic member is a substantially sealed space. A liquid crystal display device featuring:
バックライトを備え、前記液晶パネル、前記支持部材、
前記弾性部材及び該バックライトで囲まれた空間が略密
閉空間であることを特徴とする請求項第８項記載の液晶
表示装置。(9) A backlight that illuminates the liquid crystal panel is provided at a lower part of the support member, the liquid crystal panel, the support member,
9. The liquid crystal display device according to claim 8, wherein a space surrounded by the elastic member and the backlight is a substantially closed space.
特徴とする請求項第８項記載の液晶表示装置。(10) The liquid crystal display device according to claim 8, wherein the support member has an air escape portion.
とする請求項第８項記載の液晶表示装置。(11) The liquid crystal display device according to claim 8, wherein the supporting member is made of plastic.
徴とする請求項第８項記載の液晶表示装置。(12) The liquid crystal display device according to claim 8, wherein the elastic member is a rubber adhesive.
る請求項第８項記載の液晶表示装置。(13) The liquid crystal display device according to claim 8, wherein the liquid crystal is a ferroelectric liquid crystal.
であることを特徴とする請求項第８項記載の液晶表示装
置。(14) The liquid crystal display device according to claim 8, wherein the ferroelectric liquid crystal is a chiral smectic liquid crystal.
Priority Applications (13)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34313289A JPH0636132B2 (en) | 1989-12-29 | 1989-12-29 | Liquid crystal display |
| US07/634,740 US5150231A (en) | 1989-12-29 | 1990-12-27 | Impact resistant ferroelectric liquid crystal apparatus |
| DK90125758.4T DK0435343T3 (en) | 1989-12-29 | 1990-12-28 | Liquid crystal device |
| DE69032997T DE69032997T2 (en) | 1989-12-29 | 1990-12-28 | Liquid crystal apparatus |
| DE69022200T DE69022200T2 (en) | 1989-12-29 | 1990-12-28 | Liquid crystal apparatus. |
| EP90125758A EP0435343B1 (en) | 1989-12-29 | 1990-12-28 | Liquid crystal apparatus |
| AT93120672T ATE177542T1 (en) | 1989-12-29 | 1990-12-28 | LIQUID CRYSTAL APPARATUS |
| EP93120672A EP0595372B1 (en) | 1989-12-29 | 1990-12-28 | Liquid crystal apparatus |
| ES90125758T ES2076289T3 (en) | 1989-12-29 | 1990-12-28 | LIQUID GLASS DEVICE. |
| AT90125758T ATE127595T1 (en) | 1989-12-29 | 1990-12-28 | LIQUID CRYSTAL APPARATUS. |
| KR1019900022371A KR960002204B1 (en) | 1989-12-29 | 1990-12-29 | Liquid crystal devices |
| US08/264,232 US5710607A (en) | 1989-12-29 | 1994-06-22 | Impact resistant liquid crystal apparatus |
| GR950403425T GR3018306T3 (en) | 1989-12-29 | 1995-12-05 | Liquid crystal apparatus. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34313289A JPH0636132B2 (en) | 1989-12-29 | 1989-12-29 | Liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03203773A true JPH03203773A (en) | 1991-09-05 |
| JPH0636132B2 JPH0636132B2 (en) | 1994-05-11 |
Family
ID=18359164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34313289A Expired - Fee Related JPH0636132B2 (en) | 1989-12-29 | 1989-12-29 | Liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636132B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03241318A (en) * | 1990-02-20 | 1991-10-28 | Matsushita Electric Ind Co Ltd | Ferrodielectric liquid crystal device |
| US5307190A (en) * | 1991-08-19 | 1994-04-26 | Matsushita Electric Industrial Co., Ltd. | Ferroelectric liquid crystal panel and method of manufacturing same |
| EP0638832A3 (en) * | 1993-08-10 | 1995-07-26 | Canon Kk | Liquid crystal display apparatus. |
| US6216329B1 (en) | 1995-04-18 | 2001-04-17 | Canon Kabushiki Kaisha | Process for producing display apparatus |
| WO2009104414A1 (en) * | 2008-02-22 | 2009-08-27 | シャープ株式会社 | Display device |
| USRE43694E1 (en) | 2000-04-28 | 2012-10-02 | Sharp Kabushiki Kaisha | Stamping tool, casting mold and methods for structuring a surface of a work piece |
| JP2013104969A (en) * | 2011-11-11 | 2013-05-30 | Japan Display West Co Ltd | Display device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6619027B2 (en) | 2015-05-08 | 2019-12-11 | ダウ グローバル テクノロジーズ エルエルシー | Method for foaming polyolefin compositions using azodicarbonamide / citrate mixtures as nucleating agents |
-
1989
- 1989-12-29 JP JP34313289A patent/JPH0636132B2/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03241318A (en) * | 1990-02-20 | 1991-10-28 | Matsushita Electric Ind Co Ltd | Ferrodielectric liquid crystal device |
| US5307190A (en) * | 1991-08-19 | 1994-04-26 | Matsushita Electric Industrial Co., Ltd. | Ferroelectric liquid crystal panel and method of manufacturing same |
| EP0638832A3 (en) * | 1993-08-10 | 1995-07-26 | Canon Kk | Liquid crystal display apparatus. |
| US5659376A (en) * | 1993-08-10 | 1997-08-19 | Canon Kabushiki Kaisha | Liquid crystal display apparatus in which a non-transmissive elastic member surrounding a display area is disposed between a viewer side light transmissive plate and the LCD |
| US6216329B1 (en) | 1995-04-18 | 2001-04-17 | Canon Kabushiki Kaisha | Process for producing display apparatus |
| US6545733B2 (en) | 1995-04-18 | 2003-04-08 | Canon Kabushiki Kaisha | Display apparatus |
| USRE43694E1 (en) | 2000-04-28 | 2012-10-02 | Sharp Kabushiki Kaisha | Stamping tool, casting mold and methods for structuring a surface of a work piece |
| USRE44830E1 (en) | 2000-04-28 | 2014-04-08 | Sharp Kabushiki Kaisha | Stamping tool, casting mold and methods for structuring a surface of a work piece |
| USRE46606E1 (en) | 2000-04-28 | 2017-11-14 | Sharp Kabushiki Kaisha | Stamping tool, casting mold and methods for structuring a surface of a work piece |
| WO2009104414A1 (en) * | 2008-02-22 | 2009-08-27 | シャープ株式会社 | Display device |
| JPWO2009104414A1 (en) * | 2008-02-22 | 2011-06-23 | シャープ株式会社 | Display device |
| JP2013104969A (en) * | 2011-11-11 | 2013-05-30 | Japan Display West Co Ltd | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0636132B2 (en) | 1994-05-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |