JPH02264223A - Ferroelectric liquid crystal display device - Google Patents
Ferroelectric liquid crystal display deviceInfo
- Publication number
- JPH02264223A JPH02264223A JP8628189A JP8628189A JPH02264223A JP H02264223 A JPH02264223 A JP H02264223A JP 8628189 A JP8628189 A JP 8628189A JP 8628189 A JP8628189 A JP 8628189A JP H02264223 A JPH02264223 A JP H02264223A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- conductive material
- crystal 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.)
- Pending
Links
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 title claims description 10
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 41
- 239000004020 conductor Substances 0.000 claims abstract description 24
- 239000013013 elastic material Substances 0.000 claims 1
- 244000043261 Hevea brasiliensis Species 0.000 abstract description 4
- 229920003052 natural elastomer Polymers 0.000 abstract description 4
- 229920001194 natural rubber Polymers 0.000 abstract description 4
- 229920001721 polyimide Polymers 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 239000011888 foil Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000283070 Equus zebra Species 0.000 description 1
- 239000004990 Smectic liquid crystal Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005621 ferroelectricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13452—Conductors connecting driver circuitry and terminals of panels
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/50—Protective arrangements
- G02F2201/503—Arrangements improving the resistance to shock
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/325—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/361—Assembling flexible printed circuits with other printed circuits
Landscapes
- Physics & Mathematics (AREA)
- Liquid Crystal (AREA)
- Nonlinear Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Structure Of Printed Boards (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は強誘電性液晶を用いた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 display device using ferroelectric liquid crystal.
従来の技術
一般に、液晶パネルは薄くて軽量で、消費電力が小さい
等の点から、電卓からＯム機器等に広く表示装置として
用いられるようになってきた。近年、強誘電性液晶を用
いた液晶表示装置は、その優れた特性から商品化への期
待が大きく、活発な研究、開発が行われている。これは
液晶力ｊカイラルスメクチックＣ相において層構造を成
し強誘電性を示すことを利用したもので、応答速度が早
く、視野角が広い等の特徴がある。第６図は強誘電性液
晶パネルの構成を示す断面図で、液晶分子５は２枚の基
板６の間に層構造を形成して配向している。７は透明電
甑、８は配向摸、９はシール材である。2. Description of the Related Art In general, liquid crystal panels have come to be widely used as display devices in everything from calculators to computer equipment because they are thin, lightweight, and consume little power. In recent years, liquid crystal display devices using ferroelectric liquid crystals have high expectations for commercialization due to their excellent characteristics, and active research and development are being carried out. This utilizes the fact that the liquid crystal force j chiral smectic C phase forms a layered structure and exhibits ferroelectricity, and has features such as fast response speed and wide viewing angle. FIG. 6 is a cross-sectional view showing the structure of a ferroelectric liquid crystal panel, in which liquid crystal molecules 5 are oriented to form a layered structure between two substrates 6. 7 is a transparent electric box, 8 is an orientation plate, and 9 is a sealing material.
発明が解決しようとする課題
強誘電性液晶を表示装置として使用する場合、第６図の
ように液晶分子は層構造を成して配向している必要があ
るが、この強誘電性液晶パネルに外部より例えば手で叩
くなどの外力が加わると、液晶分子は第７図のようにそ
の配向が簡単に乱れる。この乱れは外力が取り去られた
後でもそのままでは自己復帰せず、表示装置としての機
能を失ってしまう。このような外力に対しては、例えば
特開昭６２−５９９２２号にあるように液晶パネルの前
面に透明カバーを設ける等の手段により保護することが
できる。Problems to be Solved by the Invention When a ferroelectric liquid crystal is used as a display device, the liquid crystal molecules must be oriented in a layered structure as shown in Figure 6. When an external force is applied from the outside, for example by hitting the liquid crystal molecules with a hand, the orientation of the liquid crystal molecules is easily disturbed as shown in FIG. Even after the external force is removed, this disturbance will not self-recover, and the display will lose its function as a display device. Such external forces can be protected by means such as providing a transparent cover on the front surface of the liquid crystal panel as disclosed in, for example, Japanese Patent Laid-Open No. 62-59922.
しかし従来の液晶表示装置は液晶パネル１３をプリント
基板１Ｑもしくは外装ケースに固着しているため、落下
等の衝撃に対しては、第８図破線に示すようにパネルの
支持部１２（例えばゼブラゴム等）を支点としてたわみ
が生じ、そのため上下基板間のずれ応力により液晶分子
の配向が乱れ、表示機能を失ってしまう。１１はフレー
ムである。However, in the conventional liquid crystal display device, the liquid crystal panel 13 is fixed to the printed circuit board 1Q or the outer case, so that the panel support part 12 (for example, zebra rubber, ) as a fulcrum, and as a result, the misalignment stress between the upper and lower substrates disturbs the alignment of liquid crystal molecules, resulting in a loss of display function. 11 is a frame.
このように強誘電性液晶表示装置を商品化するだめには
、この外力によるストレスから配向部れを生じないよう
にすることが重要な課題である。In order to commercialize a ferroelectric liquid crystal display device as described above, it is important to prevent alignment from occurring due to stress caused by this external force.
本発明はこのような衝撃に対して配向部れを生じない強
誘電性液晶表示装置を提供するものである。The present invention provides a ferroelectric liquid crystal display device that does not cause misalignment due to such impact.
課題を解決するだめの手段
上記課題を解決する本発明の手段は、弾性を有する導電
材により液晶パネルと駆動回路基板を電気的に接続する
とともに、液晶パネルを支持固定するものである。Means for Solving the Problems The means of the present invention for solving the above problems is to electrically connect the liquid crystal panel and the drive circuit board using an elastic conductive material, and to support and fix the liquid crystal panel.
作用
上記手段によシ導電材自体の弾性てより衝撃力が吸収さ
れ、配向不良が起きにくくなる。Effect: By the above-mentioned means, the impact force is absorbed by the elasticity of the conductive material itself, making it difficult for alignment defects to occur.
実施例
第１図は本発明による一実施例を示す断面図で、液晶パ
ネル１およびプリント基板３と導電材２とをそれぞれヒ
ートンールにより固着しておき、このプリント基板を機
器本体４ヘビス止めしである。Embodiment FIG. 1 is a cross-sectional view showing an embodiment of the present invention, in which a liquid crystal panel 1, a printed circuit board 3, and a conductive material 2 are each fixed by heat rails, and this printed circuit board is fastened to the device main body 4 by screws. be.
ここで導電材２は、配線パターンを形成したポリイミド
フィルム３ａを０１６羽厚０天然ゴム３ｂに、第２図に
示すようにたわませて貼り付けである。Here, the conductive material 2 is a polyimide film 3a on which a wiring pattern has been formed, and is pasted onto a natural rubber 3b with a thickness of 0.016 cm by bending it as shown in FIG.
このたわみは、液晶表示装置に衝撃が加わり導電材が伸
びだときに、配線パターン３Ｃが断線しないようにする
だめのものである。This deflection is to prevent the wiring pattern 3C from breaking when an impact is applied to the liquid crystal display device and the conductive material stretches.
このような構成の液晶表示装置（パネルサイズｅ １ｎ
ｃｈ ） と、従来の液晶表示装置の落下試験を行っ
たところ、従来の液晶表示装置では５Ｑ１１Ｍの高さか
ら落下すると配向部れが生じるのに対し、本実施例によ
る液晶表示装置では２０ｏｍｍの高さから落下しても配
向部れの発生がなく、耐衝撃性が飛躍的に向上している
。A liquid crystal display device with such a configuration (panel size e 1n
When a conventional liquid crystal display device was subjected to a drop test, it was found that in the conventional liquid crystal display device, alignment portions were misaligned when dropped from a height of 5Q11M, whereas in the liquid crystal display device of this example, alignment was caused when the liquid crystal display device was dropped from a height of 20 ohm. Even if it is dropped from the ceiling, the alignment part will not be distorted, and its impact resistance has been dramatically improved.
このように本発明によれば、液晶パネルに落下等の衝撃
が加わっても液晶パネルを支持している導電材が弾性を
有しているため、摘３図に示すように液晶パネルが略平
行に移動し、パネルがたわむことがない。従って配向部
れの発生を防ぐことができる。As described above, according to the present invention, even if the liquid crystal panel is subjected to an impact such as a fall, the conductive material supporting the liquid crystal panel has elasticity, so that the liquid crystal panel remains approximately parallel to each other as shown in Figure 3. The panel will not sag. Therefore, it is possible to prevent the occurrence of misalignment of the alignment portion.
また本発明では導電材自体が緩衝性を有しているため、
緩衝材を別個に設ける必要がない。したがって表示装置
の外形サイズが従来の液晶表示装置に比べて著しく大き
くなるといったことがない。In addition, in the present invention, since the conductive material itself has a buffering property,
There is no need to provide a separate cushioning material. Therefore, the external size of the display device does not become significantly larger than that of conventional liquid crystal display devices.
本実施例では液晶パネルと導電材をヒートシールのみで
固着したが、第４図に示すように固着部を金属フレーム
４ａ等でかしめ、補強すればなおよい。In this embodiment, the liquid crystal panel and the conductive material are fixed by heat sealing only, but it is better to reinforce the fixed part by caulking with a metal frame 4a or the like as shown in FIG.
第５図は他の実施例による導電材の立面図で、天然ゴム
３ｂ上に金属箔により配線パターン３Ｃを形成し、更に
天然ゴム３ｂ′により金属箔を挾んである。本実施例で
は配線パターン３ｃを一部波状にすることにより、導電
材が伸縮しても配線パターン３Ｃが断線しないようにし
である。このような導電材を用いた液晶表示装置におい
ても、上記実施例と同様な効果を得ることができる。FIG. 5 is an elevational view of a conductive material according to another embodiment, in which a wiring pattern 3C is formed using metal foil on natural rubber 3b, and the metal foil is further sandwiched between natural rubber 3b'. In this embodiment, the wiring pattern 3c is partially wavy to prevent the wiring pattern 3c from being disconnected even if the conductive material expands and contracts. Even in a liquid crystal display device using such a conductive material, effects similar to those of the above embodiment can be obtained.
発明の効果
以上のように、弾性を有する導電材を用いて液晶パネル
を支持固定するととてより、落下等の衝撃に対し配向部
れが発生しにくくなる。また導電材自体が緩衝材と導電
体を兼ねているため、表示装置全体が著しく大きくなる
ことがないという効果が得られる。Effects of the Invention As described above, when a liquid crystal panel is supported and fixed using an elastic conductive material, it becomes more difficult for alignment to occur due to impact such as dropping. Furthermore, since the conductive material itself serves as both a buffer material and a conductor, an effect is obtained in that the entire display device does not become significantly large.
第１図は本発明による一実施例の強誘電性液晶表示装置
の断面図、第２図ａは本実施例で用いた導電材の断面図
、第２図すはその平面図、第３図は本発明による液晶表
示装置に衝撃が加わったときの様子を説明する説明図、
第４図は導電材と液晶パネルとの固着部の補強方法を説
明する説明図、第６図ａは本発明の他の実施例で用いた
導電材の平面図、第５図すばその断面図、第６図は従来
の強誘電性液晶パネルの基本的な構成図、第７図はパネ
ルに外力が加わった場合の液晶の配向部れを模式的に示
した説明図、第８図は表示装置に衝撃が加わった場合の
パネルのたわみを説明する模式液晶パネル、
・・・導電材、
・・プリ
ント基板、
４・・・・・・機器本体。
第
図FIG. 1 is a sectional view of a ferroelectric liquid crystal display device according to an embodiment of the present invention, FIG. 2a is a sectional view of a conductive material used in this embodiment, FIG. 2 is a plan view thereof, and FIG. is an explanatory diagram illustrating what happens when a shock is applied to the liquid crystal display device according to the present invention,
Fig. 4 is an explanatory diagram illustrating a method of reinforcing the fixed portion between the conductive material and the liquid crystal panel, Fig. 6a is a plan view of the conductive material used in another embodiment of the present invention, and Fig. 5 is a cross section of the strip. Figure 6 is a basic configuration diagram of a conventional ferroelectric liquid crystal panel, Figure 7 is an explanatory diagram schematically showing the orientation of liquid crystal when an external force is applied to the panel, and Figure 8 is A schematic liquid crystal panel to explain the deflection of the panel when a shock is applied to the display device, ... conductive material, ... printed circuit board, 4 ... device body. Diagram
Claims (1)
路を設けた導電材により液晶パネルと駆動回路基板を電
気的に接続するとともに、前記液晶パネルを支持固定し
た強誘電性液晶表示装置。A ferroelectric liquid crystal display device in which a liquid crystal panel and a driving circuit board are electrically connected to each other by a conductive material having at least one conductive path provided on or inside the elastic material, and the liquid crystal panel is supported and fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8628189A JPH02264223A (en) | 1989-04-05 | 1989-04-05 | Ferroelectric liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8628189A JPH02264223A (en) | 1989-04-05 | 1989-04-05 | Ferroelectric liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02264223A true JPH02264223A (en) | 1990-10-29 |
Family
ID=13882446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8628189A Pending JPH02264223A (en) | 1989-04-05 | 1989-04-05 | Ferroelectric liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02264223A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02136286U (en) * | 1989-04-18 | 1990-11-14 | ||
| EP0435343A2 (en) * | 1989-12-29 | 1991-07-03 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0604893A2 (en) * | 1992-12-26 | 1994-07-06 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0731372A2 (en) * | 1995-03-08 | 1996-09-11 | Canon Kabushiki Kaisha | Display apparatus characterized by board-supporting structure |
| JP2002350891A (en) * | 2001-05-30 | 2002-12-04 | Optrex Corp | Wiring board for liquid crystal panel and mounting structure therefor |
-
1989
- 1989-04-05 JP JP8628189A patent/JPH02264223A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02136286U (en) * | 1989-04-18 | 1990-11-14 | ||
| JPH0725778Y2 (en) * | 1989-04-18 | 1995-06-07 | シチズン時計株式会社 | Small LCD display |
| EP0595372A3 (en) * | 1989-12-29 | 1994-07-13 | Canon Kk | Liquid crystal apparatus |
| US5150231A (en) * | 1989-12-29 | 1992-09-22 | Canon Kabushiki Kaisha | Impact resistant ferroelectric liquid crystal apparatus |
| EP0595372A2 (en) * | 1989-12-29 | 1994-05-04 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0435343A3 (en) * | 1989-12-29 | 1991-09-18 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0435343A2 (en) * | 1989-12-29 | 1991-07-03 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| US5710607A (en) * | 1989-12-29 | 1998-01-20 | Canon Kabushiki Kaisha | Impact resistant liquid crystal apparatus |
| EP0604893A2 (en) * | 1992-12-26 | 1994-07-06 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0604893A3 (en) * | 1992-12-26 | 1995-01-18 | Canon Kk | Liquid crystal apparatus. |
| US5517208A (en) * | 1992-12-26 | 1996-05-14 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
| EP0731372A2 (en) * | 1995-03-08 | 1996-09-11 | Canon Kabushiki Kaisha | Display apparatus characterized by board-supporting structure |
| EP0731372A3 (en) * | 1995-03-08 | 1997-07-16 | Canon Kk | Display apparatus characterized by board-supporting structure |
| US5933206A (en) * | 1995-03-08 | 1999-08-03 | Canon Kabushiki Kaisha | Display apparatus characterized by circuit board-supporting structure |
| JP2002350891A (en) * | 2001-05-30 | 2002-12-04 | Optrex Corp | Wiring board for liquid crystal panel and mounting structure therefor |
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