JP2507784B2 - Liquid crystal device and driving method thereof - Google Patents
Liquid crystal device and driving method thereofInfo
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- JP2507784B2 JP2507784B2 JP63159925A JP15992588A JP2507784B2 JP 2507784 B2 JP2507784 B2 JP 2507784B2 JP 63159925 A JP63159925 A JP 63159925A JP 15992588 A JP15992588 A JP 15992588A JP 2507784 B2 JP2507784 B2 JP 2507784B2
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Description
【発明の詳細な説明】 〔発明の分野〕 本発明は、液晶装置に関し、詳しくは強誘電性液晶を
用いた液晶装置に関するものである。Description: FIELD OF THE INVENTION The present invention relates to a liquid crystal device, and more particularly to a liquid crystal device using a ferroelectric liquid crystal.
クラークとラガーウオルは、Applied Physics Lett
ers 第36巻，第11号（1980年６月１日発行）、P.899−
901、又は米国特許第4,367,924号、米国特許第4,563,05
9で、表面安定化強誘電性液晶（Surface−Stabilized
ferroelectric liquid crystal）による双安定性強誘
電性液晶を明らかにした。この双安定性強誘電性液晶
は、バルク状態のカイラルスメクチツク相における液晶
分子のらせん配列構造の形成を抑制するのに十分に小さ
い間隔に設定した一対の基板間に配置させ、且つ複数の
液晶分子で組織された垂直分子層を一方向に配列させる
ことによって実現された。Clark and Lager Walk, Applied Physics Lett
ers Vol. 36, No. 11 (Published June 1, 1980), P.899-
901, or U.S. Pat.No. 4,367,924, U.S. Pat.No. 4,563,05
9 、 Surface-stabilized liquid crystal
Bistable ferroelectric liquid crystal has been clarified. The bistable ferroelectric liquid crystal is disposed between a pair of substrates set at a distance small enough to suppress the formation of a helical arrangement of liquid crystal molecules in a chiral smectic phase in a bulk state, and This was realized by arranging the vertical molecular layers organized by liquid crystal molecules in one direction.
かかる強誘電性液晶で形成した表示画面を備えた液晶
装置は、例えば神辺らの米国特許第4,655,561号公報な
どに記載されたマルチプレクシング駆動方式を用いるこ
とによって大容量画素の表示画面に画像を形成すること
ができる。上述の液晶装置は、ワード・プロセツサ、パ
ーソナ・パソコン、マイクロ・プリンタ、テレビジヨン
などの表示画面に利用することができるが、このために
は液晶セルを筺体中に組込み、液晶セルの周辺を枠状の
固定部材によって固定し、該枠内を表示画面とする必要
がある。A liquid crystal device having a display screen formed of such a ferroelectric liquid crystal forms an image on the display screen of large-capacity pixels by using the multiplexing driving method described in, for example, U.S. Pat.No. 4,655,561 of Kannabe et al. can do. The above-mentioned liquid crystal device can be used for display screens of word processors, personal computers, micro printers, televisions, etc. For this purpose, the liquid crystal cell is built into the housing and the periphery of the liquid crystal cell is framed. It is necessary to fix the inside of the frame as a display screen by fixing with a fixing member having a rectangular shape.
一般に、液晶セルには一対の相対向する薄ガラスが用
いられ、液晶セル自体をCRT表示画面の様に湾曲させる
ことが困難で、平板状の表示画面となっている。このた
め液晶セルを筺体中に組込むと、平板状の液晶表示画面
の端部領域が前述した枠状固定部材の凸部によって隠れ
てしまい、特に、通常の観察方向に対して表示画面の右
側及び左側の端部領域の表示画像を観ることができなく
問題点があった。Generally, a pair of opposed thin glasses is used for a liquid crystal cell, and it is difficult to bend the liquid crystal cell itself like a CRT display screen, and a flat display screen is formed. For this reason, when the liquid crystal cell is incorporated in the housing, the end portion area of the flat plate-shaped liquid crystal display screen is hidden by the convex portion of the frame-shaped fixing member described above. There is a problem that the display image in the left end area cannot be seen.
従って、液晶表示画面内のうち数mm〜数cm幅の端部領
域に亘って表示画像を形成しない非表示領域を設ける必
要があった。Therefore, it is necessary to provide a non-display area in which a display image is not formed over an edge area having a width of several mm to several cm in the liquid crystal display screen.
ところで、前述した初期配向時の強誘電性液晶素子
は、無電界状態において明状態を生じるドメインと暗状
態を生じるドメインとが混在しており、印加電圧の極性
に応じて明状態及び暗状態のうち何れか一方の状態を生
じるドメインにされる。前述した非表示領域での強誘電
性液晶の配向状態は、初期配向時の状態がそのまま維持
されているため、明状態と暗状態を生じさせるドメイン
が混在し、これが原因となって表示品位が低下する問題
点があった。By the way, in the ferroelectric liquid crystal element at the time of the above-described initial alignment, a domain that produces a bright state and a domain that produces a dark state in the absence of an electric field are mixed. It is a domain that causes one of these states. The alignment state of the ferroelectric liquid crystal in the non-display region described above is the same as the state at the time of the initial alignment, and therefore a domain that causes a bright state and a dark state is mixed. There was a problem of lowering.
即ち、非表示領域の液晶が劣化し、それが表示領域に
も影響を及ぼすおそれがあった。更には、非表示領域は
液晶セルの厚みがばらつき易く、液晶の応答性や光学特
性が表示領域ほど良好でなかった。That is, the liquid crystal in the non-display area is deteriorated, which may affect the display area. Furthermore, in the non-display area, the thickness of the liquid crystal cell is likely to vary, and the liquid crystal response and optical characteristics are not as good as those in the display area.
［発明の概要］ 本発明の目的は、上述した技術的課題に鑑み成された
ものであり非表示領域及びその付近の表示領域の光学状
態を良好に保持し、表示品位を改善した液晶装置及びそ
の駆動法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention was made in view of the above-mentioned technical problems, and a liquid crystal device in which an optical state of a non-display area and a display area in the vicinity thereof is favorably maintained and a display quality is improved, It is to provide the driving method.
本発明は、画像表示領域と該画像表示領域に隣接して
設けられた端部領域とに、それぞれ、対向電極と該対向
電極間に配されたカイラスルメクティック液晶とを有す
る交差部が複数配設された液晶セルと、該画像表示領域
の該交差部の該液晶を第１の状態に配向させる為の第１
の信号又は該液晶を第２の状態に配向させる為の第２の
信号を選択的に該画像表示領域の該交差部の該対向電極
に印加して、画像表示を行う為の駆動手段と、を具備す
る液晶装置であって、該端部領域の該交差部の該液晶を
該第１の状態に配向させる為の信号として、該第１の信
号の最大パルス幅及び／又は最大波高値よりも大きなパ
ルス幅及び／又は波高値を有する第３の信号を、該端部
領域の該交差部の該対向電極に印加する為の駆動手段を
備えており、該画像表示領域にて画像表示を行う一方、
該第３の信号の印加により該端部領域の該交差部の液晶
を該第１の状態に配向させ該端部領域の光学状態を実質
的に一定に保つことを特徴とする液晶装置及びその駆動
法である。According to the present invention, a plurality of intersections each having a counter electrode and a chiral lumectic liquid crystal disposed between the counter electrodes are provided in the image display region and the end region provided adjacent to the image display region. A liquid crystal cell arranged and a first for orienting the liquid crystal at the intersection of the image display region to a first state.
Drive means for selectively applying the signal of No. 2 or the second signal for orienting the liquid crystal to the second state to the counter electrode at the intersection of the image display region to display an image, A liquid crystal device comprising: a maximum pulse width and / or a maximum crest value of the first signal as a signal for orienting the liquid crystal at the intersection of the end region to the first state. Also has a driving means for applying a third signal having a large pulse width and / or peak value to the counter electrode at the intersection of the end region, and image display is performed in the image display region. While doing
A liquid crystal device, characterized in that the liquid crystal at the intersection of the end regions is oriented to the first state by applying the third signal to keep the optical state of the end regions substantially constant. It is a driving method.
本発明によれば、表示領域に印加される信号電圧より
大きな充分に閾値を越える信号電圧が印加されるので、
端部領域で閾値がばらついていても確実に所定の光学状
態に保持できる。According to the present invention, since a signal voltage that is sufficiently larger than the signal voltage applied to the display area and exceeds the threshold value is applied,
Even if the threshold value varies in the end region, it is possible to reliably maintain the predetermined optical state.
第１図は、本発明のブロツク図である。液晶表示画面
11は情報信号に応じて画像を形成する画像表示領域11A
と画像を表示しない非表示領域である端部領域11Bとを
有している。液晶表示画面11は強誘電性液晶によって形
成され、その駆動部は走査側駆動回路12と情報側／枠側
駆動回路13が設けられ、画像表示領域11Aの表示駆動は
走査側駆動回路12と情報側駆動回路とによって行われ、
端部領域の駆動は、走査側駆動回路と枠側駆動回路とに
よって行われる。走査側駆動回路12は、走査信号S1,S2,
S3…を出力し、情報側／枠側駆動回路13は情報信号I1,I
2,I3…と枠信号W1,W2,W3…を出力する。この走査側駆動
回路12と情報側／枠側駆動回路13は、それぞれアドレス
・デコーダ14によってそのアドレスが決定される。又、
コラム・データ16は画像表示領域11Aで画像表示がなさ
れ、端部領域11Bが一様に明又は暗の光学状態となる様
にCPU15によって制御されて、情報側／枠側駆動回路13
に出力する。FIG. 1 is a block diagram of the present invention. LCD display screen
11 is an image display area 11A for forming an image in accordance with an information signal
And an end area 11B which is a non-display area in which an image is not displayed. The liquid crystal display screen 11 is formed of a ferroelectric liquid crystal, the driving unit thereof is provided with the scanning side driving circuit 12 and the information side / frame side driving circuit 13, and the display driving of the image display region 11A is performed by the scanning side driving circuit 12 and the information. Side drive circuit and
The driving of the end region is performed by the scanning side driving circuit and the frame side driving circuit. The scanning side drive circuit 12 includes scanning signals S 1 , S 2 ,
S 3 ... Is output, and the information side / frame side drive circuit 13 outputs the information signals I 1 , I
2 and I 3 ... and frame signals W 1 , W 2 , W 3 ... are output. The addresses of the scanning side driving circuit 12 and the information side / frame side driving circuit 13 are determined by the address decoder 14, respectively. or,
The column data 16 is image-displayed in the image display area 11A, and is controlled by the CPU 15 so that the end area 11B is uniformly in the bright or dark optical state, and the information side / frame side drive circuit 13
Output to.
第２図は、液晶表示画面11に配線したマトリクス電極
を表わしている。液晶表示画面11内の画像表示領域11A
には、走査電極21と情報電極22との交差部で形成した画
素がＮ行×Ｍ列（N:走査線数、M:情報線数）で配列され
ており、端部領域11Bには走査電極21と枠形成電極23と
の交差部で形成した画素が配列されている。枠形成電極
23の本数は端部領域11Bの線幅によって決定すべきであ
る。この端部領域11Bの線幅は一般に数mm〜数cm程度で
よい。FIG. 2 shows the matrix electrodes wired on the liquid crystal display screen 11. Image display area 11A in liquid crystal display screen 11
The pixels formed at the intersections of the scanning electrodes 21 and the information electrodes 22 are arranged in N rows × M columns (N: the number of scanning lines, M: the number of information lines), and the end region 11B is scanned. Pixels formed at the intersections of the electrodes 21 and the frame forming electrodes 23 are arranged. Frame forming electrode
The number of 23 should be determined by the line width of the end region 11B. The line width of the end region 11B may be generally about several mm to several cm.
走査電極21と情報電極22及び枠形成電極23との間に
は、強誘電性液晶が配置され、第３図に示す駆動波形に
よって明状態と暗状態が形成される。A ferroelectric liquid crystal is arranged between the scanning electrode 21, the information electrode 22, and the frame forming electrode 23, and a bright state and a dark state are formed by driving waveforms shown in FIG.
第３図の駆動例によれば、走査選択期間（この期間の
信号を走査選択信号という）内の期間T1で選択された走
査電極上の画素は、一斉に暗（黒）の光学状態にクリヤ
ーされ、期間T2でそれらの画素のうち選択された画素が
選択的に明（白）の光学状態にスイツチングし、他の選
択されていない画素が暗の光学状態を保持することによ
って、一走査線の書込みが行われる。この操作を走査線
毎に順次行うことによって情報信号に応じた一画面が表
示される。上述の駆動による表示の際、期間T1時の光学
状態を明状態となる様にクロスニコルの偏光子を調節す
ることもできる。According to the driving example of FIG. 3, the pixels on the scan electrodes selected in the period T 1 within the scan selection period (the signal in this period is referred to as the scan selection signal) are brought into the dark (black) optical state all at once. By clearing and selectively switching those pixels out of those pixels to the bright (white) optical state during the period T 2 and keeping the other unselected pixels in the dark optical state. The scanning line is written. By sequentially performing this operation for each scanning line, one screen corresponding to the information signal is displayed. At the time of display by driving as described above, the crossed Nicols polarizer can be adjusted so that the optical state during the period T 1 becomes a bright state.
画像表示領域11Aでは、情報電極22に印加した情報信
号に応じて画像が表示され、端部領域11Bでは、この領
域内の画素が一様に明（白）の光学状態となる様に制御
されている。本発明の好ましい具体例では、端部領域11
Bの光学状態を一様に明状態とすることによって表示画
面11のコントラストを向上させることができる。In the image display area 11A, an image is displayed according to the information signal applied to the information electrode 22, and in the end area 11B, the pixels in this area are controlled so as to be uniformly in a bright (white) optical state. ing. In the preferred embodiment of the invention, the end region 11
By making the optical state of B uniformly bright, the contrast of the display screen 11 can be improved.
第４図は本発明の別の好ましい具体例を表している。
第４図に示す具体例では、端部領域11B内の枠形成電極2
3の線幅が情報電極22の線幅（100μｍ〜500μｍ）より
大きく設定され、好ましくは数mm〜数cm線幅の枠形成電
極23を１本用いることができる。この結果、端子数を第
２図に示す具体例と比較して大幅に減らすことができ、
情報側／枠側駆動回路13のIC設計を簡略化することがで
きる。FIG. 4 shows another preferred embodiment of the present invention.
In the specific example shown in FIG. 4, the frame forming electrode 2 in the end region 11B
The line width 3 is set larger than the line width of the information electrode 22 (100 μm to 500 μm), and preferably one frame forming electrode 23 having a line width of several mm to several cm can be used. As a result, the number of terminals can be significantly reduced compared to the concrete example shown in FIG.
The IC design of the information side / frame side drive circuit 13 can be simplified.
又、上述の如く枠形成電極23が幅広に配線されている
ため、枠形成電極23の１本当りの容量が高くなり、液晶
層には閾値電圧を越えるのに十分に大きい電圧を印加す
る必要があった。従って、本具体例における好ましい駆
動例では、情報信号の最大パルス幅T0より長いパルス幅
TXをもつ電圧信号を走査選択信号と同期して印加するこ
とができる。この代表例を第５図に示す。Further, since the frame forming electrodes 23 are wired widely as described above, the capacity per one of the frame forming electrodes 23 increases, and it is necessary to apply a voltage large enough to exceed the threshold voltage to the liquid crystal layer. was there. Therefore, in the preferred driving example in this example, a pulse width longer than the maximum pulse width T 0 of the information signal is used.
A voltage signal having T X can be applied in synchronization with the scan selection signal. A typical example of this is shown in FIG.
第５図の駆動例によれば、画像表示領域11Aの走査電
極21と情報電極22は第３図の駆動方式と同様に駆動され
るが、端部領域11Bの枠形成電極23への印加電圧信号が
情報信号の最大パルス幅T0に対して3/2倍のパルス幅TX
のパルスをもっている。かかる電圧信号を枠形成電極23
へ印加することによって端部領域11Bを確実に一様な明
の状態に制御することができる。According to the driving example in FIG. 5, the scanning electrodes 21 and the information electrodes 22 in the image display area 11A are driven in the same manner as in the driving method in FIG. 3, but the voltage applied to the frame forming electrode 23 in the end area 11B is applied. The signal has a pulse width T X that is 3/2 times the maximum pulse width T 0 of the information signal.
Have a pulse of. The voltage signal is applied to the frame forming electrode 23.
By applying the voltage to the edge region 11B, it is possible to reliably control the end region 11B to a uniform bright state.
第６図は、本発明の別の好ましい具体例である。画像
表示領域11Aは第３図の駆動方式と同様に駆動される
が、端部領域11Bの枠形成電極23への印加電圧信号が情
報信号の最大波高値V0に対して２倍の波高値のパルスを
もっている。FIG. 6 is another preferred embodiment of the present invention. The image display area 11A is driven in the same manner as the driving method shown in FIG. 3, but the voltage signal applied to the frame forming electrode 23 in the end area 11B has a peak value twice that of the maximum peak value V 0 of the information signal. Have a pulse of.
第７図は、強誘電性液晶セルの例を模式的に描いたも
のである。71aと71bはIn2O3,SnO2やITO（インジウム−
テイン−オキサイド）等の透明電極がコートされた基板
（ガラス板）であり、その間に液晶分子層72がガラス面
に垂直になるよう配向したSmC＊（カイラルスメクチツ
クＣ）相の液晶が封入されている。太線で示した線73が
液晶分子を表わしており、この液晶分子73は、その分子
に直交した方向に双極子モーメント（Ｐ⊥）74を有して
いる。基板71aと71b上の電極間に一定の閾値以上の電圧
を印加すると、液晶分子73のらせん構造がほどけ、双極
子モーメント（Ｐ⊥）74はすべて電界方向に向くよう、
液晶分子73の配向方向を変えることができる。液晶分子
73は細長い形状を有しており、その長軸方向と短軸方向
で屈折率異方性を示し、従って例えばガラス面の上下に
互いにクロスニコルの位置関係に配置した偏光子を置け
ば、電圧印加極性によって光学特性が変わる液晶光学変
調素子となることは容易に理解される。さらに液晶セル
の厚さを十分に薄くした場合（例えば１μ）には、第８
図に示すように電界を印加していない状態でも液晶分子
のらせん構造はほどけ、その双極子モーメントPa又はPb
は上向き（84a）又は下向き（84b）のどちらかの状態を
とる。このようなセルに、第８図に示す如く一定の閾値
以上の極性の異なる電界Ea又はEbを所定時間付与する
と、双極子モーメントは電界Ea又はEbの電界ベクトルに
対して上向き84a又は下向き84bと向きを変え、それに応
じて液晶分子は第１の安定状態83aかあるいは第２の安
定状態83bの何れか一方に配向する。FIG. 7 is a schematic drawing of an example of a ferroelectric liquid crystal cell. 71a and 71b are In 2 O 3 , SnO 2 and ITO (Indium-
A substrate (glass plate) coated with a transparent electrode such as thein-oxide), and liquid crystal of SmC * (chiral smectic C) phase in which the liquid crystal molecular layer 72 is oriented perpendicular to the glass surface is enclosed between them. Has been done. A thick line 73 represents a liquid crystal molecule, and the liquid crystal molecule 73 has a dipole moment (P⊥) 74 in a direction orthogonal to the molecule. When a voltage above a certain threshold is applied between the electrodes on the substrates 71a and 71b, the helical structure of the liquid crystal molecules 73 is unraveled, and all dipole moments (P⊥) 74 are oriented in the electric field direction.
The orientation direction of the liquid crystal molecules 73 can be changed. Liquid crystal molecule
73 has an elongated shape, and exhibits refractive index anisotropy in the major axis direction and the minor axis direction thereof, and therefore, for example, if polarizers arranged in a crossed Nicols position above and below a glass surface are placed, It is easy to understand that the liquid crystal optical modulator has optical characteristics that change depending on the applied polarity. If the liquid crystal cell is made sufficiently thin (for example, 1 μm), the eighth
As shown in the figure, the helical structure of the liquid crystal molecule is unwound even when no electric field is applied, and its dipole moment Pa or Pb
Takes either an upward (84a) or downward (84b) state. When an electric field Ea or Eb having a polarity equal to or greater than a certain threshold is applied for a predetermined time to such a cell as shown in FIG. The orientation is changed, and the liquid crystal molecules are aligned in either the first stable state 83a or the second stable state 83b accordingly.
このような強誘電性液晶を光学変調素子として用いる
ことの利点は２つある。第１に応答速度が極めて速いこ
と、第２に液晶分子の配向が双安定状態を有することで
ある。第２の点を例えば第８図によって説明すると、電
界Eaを印加すると液晶分子は第１の安定状態83aに配向
するが、この状態は電界を切っても安定である。又、逆
向きの電界Ebを印加すると液晶分子は第２の安定状態83
bに配向して、その分子の向きを変えるが、やはり電界
を切ってもこの状態に留っている。又、与える電界Eaが
一定の閾値を超えない限り、それぞれの配向状態にやは
り維持されている。このような応答速度の速さと双安定
性が有効に実現されるには、セルとしては出来るだけ薄
い方が好ましく、一般的には0.5μ〜20μ、特に１μ〜
５μが適している。There are two advantages of using such a ferroelectric liquid crystal as the optical modulation element. Firstly, the response speed is extremely fast, and secondly, the alignment of liquid crystal molecules has a bistable state. Explaining the second point with reference to FIG. 8, for example, when the electric field Ea is applied, the liquid crystal molecules are aligned in the first stable state 83a, but this state is stable even when the electric field is cut off. When a reverse electric field Eb is applied, the liquid crystal molecules are in the second stable state 83.
The molecule is oriented to b and the direction of the molecule is changed, but it remains in this state even after the electric field is cut off. Further, as long as the applied electric field Ea does not exceed a certain threshold value, the respective alignment states are still maintained. In order to effectively realize such a high response speed and bistability, it is preferable that the cell is as thin as possible, generally 0.5 μ to 20 μ, and particularly 1 μ to
5μ is suitable.
本発明の駆動法で用いることができる双安定性を有す
る液晶としては、強誘電性を有するカイラルスメクチツ
ク液晶が最も好ましく、そのうちカイラルスメクチツク
Ｃ相（SmC＊）又はＨ相（SmH＊）の液晶が適している。
この強誘電性液晶については、例えば米国特許第4,613,
209号公報、米国特許第4,614,609号公報、米国特許第4,
622,165号公報などに記載されたものを用いることがで
きる。As a liquid crystal having bistability that can be used in the driving method of the present invention, a chiral smectic liquid crystal having ferroelectricity is most preferable, and among them, a chiral smectic C phase (SmC * ) or H phase (SmH * ) . ) Liquid crystal is suitable.
For this ferroelectric liquid crystal, for example, U.S. Pat.
209 publication, U.S. Pat.No. 4,614,609 publication, U.S. Pat.
Those described in, for example, Japanese Patent No. 622,165 can be used.
又、本発明では前述した駆動例の他に、例えば米国特
許第4,705,345号公報、米国特許第4,707,078号公報など
に記載されたものも用いることができる。Further, in the present invention, in addition to the driving examples described above, those described in, for example, US Pat. No. 4,705,345 and US Pat. No. 4,707,078 can be used.
本発明によれば、平板状画面であっても、その周囲の
画像までもが見易い上に、画像表示領域を枠状に形成し
た端部領域の光学状態を一様の状態とすることができ、
表示品位を向上させることができる。According to the present invention, even in the case of a flat screen, it is possible to easily see even the image around the flat screen, and it is possible to make the optical state of the end region where the image display region is formed in a frame shape uniform. ,
The display quality can be improved.
第１図は本発明のブロツク図である。第２図は本発明で
用いたマトリクス電極の平面図である。第３図は本発明
で用いたマルチプレクシング駆動の波形図である。第４
図は本発明で用いた別のマトリクス電極の平面図であ
る。第５図及び第６図は本発明で用いた別のマルチプレ
クシング駆動の波形図である。第７図及び第８図は本発
明で用いた強誘電性液晶セルの斜視図である。FIG. 1 is a block diagram of the present invention. FIG. 2 is a plan view of the matrix electrode used in the present invention. FIG. 3 is a waveform diagram of the multiplexing drive used in the present invention. Fourth
The figure is a plan view of another matrix electrode used in the present invention. 5 and 6 are waveform diagrams of another multiplexing drive used in the present invention. 7 and 8 are perspective views of the ferroelectric liquid crystal cell used in the present invention.
Claims (7)
設けられた端部領域とに、それぞれ、対向電極と該対向
電極間に配されたカイラスルメクティック液晶とを有す
る交差部が複数配設された液晶セルと、 該画像表示領域の該交差部の該液晶を第１の状態に配向
させる為の第１の信号又は該液晶を第２の状態に配向さ
せる為の第２の信号を選択的に該画像表示領域の該交差
部の該対向電極に印加して画像表示を行う為の駆動手段
と、 を具備する液晶装置であって、 該端部領域の該交差部の該液晶を該第１の状態に配向さ
せる為の信号として、該第１の信号の最大パルス幅及び
／又は最大波高値よりも大きなパルス幅及び／又は波高
値を有する第３の信号を、該端部領域の該交差部の該対
向電極に印加する為の駆動手段を備えており、 該画像表示領域にて画像表示を行う一方、該第３の信号
の印加により該端部領域の該交差部の液晶を該第１の状
態に配向させ該端部領域の光学状態を実質的に一定に保
つことを特徴とする液晶装置。1. An image display region and an end region provided adjacent to the image display region are provided with intersections each having a counter electrode and a chiral lumectic liquid crystal disposed between the counter electrodes. A plurality of liquid crystal cells, and a first signal for orienting the liquid crystal at the intersection of the image display region to the first state or a second signal for orienting the liquid crystal to the second state. A liquid crystal device comprising: a driving unit for selectively applying a signal to the counter electrode at the intersection of the image display area to display an image, the liquid crystal device comprising: As a signal for orienting the liquid crystal to the first state, a third signal having a pulse width and / or peak value larger than the maximum pulse width and / or maximum peak value of the first signal is used as the signal. Drive means for applying to the counter electrode at the intersection of the partial region, While the image is displayed in the image display area, the liquid crystal at the intersection of the end regions is oriented to the first state by applying the third signal, and the optical state of the end regions is substantially constant. Liquid crystal device characterized by being kept at.
態が暗状態を呈するように偏光子が設けられていること
を特徴とする請求項１に記載の液晶装置。2. The liquid crystal device according to claim 1, wherein a polarizer is provided so that the first state exhibits a bright state and the second state exhibits a dark state.
表示領域の左右両端に位置していることを特徴とする請
求項１に記載の液晶装置。3. The liquid crystal device according to claim 1, wherein the end regions are located at both left and right ends of the image display region with respect to the viewing direction.
とを特徴とする請求項１に記載の液晶装置。4. The liquid crystal device according to claim 1, further comprising a CPU that controls the driving means.
電極群と、該走査電極群に交差する電極群と、により構
成されていることを特徴とする請求項１乃至４に記載の
液晶装置。5. The counter electrode according to claim 1, wherein the counter electrode is composed of a scanning electrode group to which a scanning signal is applied and an electrode group intersecting with the scanning electrode group. Liquid crystal device.
極一本の幅より大きな幅をもつことを特徴とする請求項
１乃至４に記載の液晶装置。6. The liquid crystal device according to claim 1, wherein the end region has a width larger than a width of the one counter electrode in the image display region.
設けられた端部領域とに、それぞれ、対向電極と該対向
電極間に配されたカイラルスメクティック液晶とを有す
る交差部が複数配設された液晶装置の駆動法であって、 該画像表示領域の該交差部の該液晶を第１の状態に配向
させる為の第１の信号又は該液晶を第２の状態に配向さ
せる為の第２の信号を選択的に該画像表示領域の該交差
部の該対向電極に印加することにより、画像表示を行う
とともに、 該端部領域の該交差部の該液晶を該第１の状態に配向さ
せる為の信号として、該第１の信号の最大パルス幅及び
／又は最大波高値よりも大きなパルス幅及び／又は波高
値を有する第３の信号を、該端部領域の該交差部の該対
向電極に印加することにより、該端部領域の該交差部の
液晶を該第１の安定状態に配向させ該端部領域の光学状
態を実質的に一定に保つことを特徴とする駆動法。7. An image display region and an end region provided adjacent to the image display region are provided with a plurality of intersections each having a counter electrode and a chiral smectic liquid crystal disposed between the counter electrodes. A method for driving an installed liquid crystal device, comprising: a first signal for orienting the liquid crystal at the intersection of the image display region to a first state or an orienting the liquid crystal for a second state. An image is displayed by selectively applying a second signal to the counter electrode at the intersection of the image display region, and the liquid crystal at the intersection of the end region is brought to the first state. As a signal for orienting, a third signal having a pulse width and / or crest value larger than the maximum pulse width and / or the maximum crest value of the first signal is used as the signal at the intersection of the end regions. By applying to the counter electrode, the liquid crystal at the intersection of the end region Driving method characterized by maintaining substantially constant the optical state of the end region oriented in a stable state of the first.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63159925A JP2507784B2 (en) | 1988-06-28 | 1988-06-28 | Liquid crystal device and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63159925A JP2507784B2 (en) | 1988-06-28 | 1988-06-28 | Liquid crystal device and driving method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH028814A JPH028814A (en) | 1990-01-12 |
| JP2507784B2 true JP2507784B2 (en) | 1996-06-19 |
Family
ID=15704149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63159925A Expired - Fee Related JP2507784B2 (en) | 1988-06-28 | 1988-06-28 | Liquid crystal device and driving method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507784B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7948464B2 (en) | 2004-09-29 | 2011-05-24 | Citizen Holdings Co., Ltd. | Memory-type liquid crystal display device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0527717A (en) * | 1991-07-24 | 1993-02-05 | Canon Inc | Ferroelectric liquid crystal device |
| JP2753928B2 (en) * | 1992-11-06 | 1998-05-20 | キヤノン株式会社 | Liquid crystal display |
| WO2001057838A1 (en) * | 2000-01-31 | 2001-08-09 | Seiko Epson Corporation | Electrooptic device and driving method thereof |
| JP2006227462A (en) * | 2005-02-21 | 2006-08-31 | Citizen Watch Co Ltd | Memory-type liquid crystal display device |
| DE102019211646B4 (en) * | 2019-08-02 | 2023-09-21 | Audi Ag | Process arrangement and soldered connection of two sheet metal parts |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58220176A (en) * | 1982-06-17 | 1983-12-21 | シャープ株式会社 | Liquid crystal display |
| JP2519420B2 (en) * | 1986-05-16 | 1996-07-31 | セイコー電子工業株式会社 | Ferroelectric liquid crystal electro-optical device |
-
1988
- 1988-06-28 JP JP63159925A patent/JP2507784B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7948464B2 (en) | 2004-09-29 | 2011-05-24 | Citizen Holdings Co., Ltd. | Memory-type liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH028814A (en) | 1990-01-12 |
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