JP2635967B2 - Driving method of ferroelectric liquid crystal device - Google Patents
Driving method of ferroelectric liquid crystal deviceInfo
- Publication number
- JP2635967B2 JP2635967B2 JP62133816A JP13381687A JP2635967B2 JP 2635967 B2 JP2635967 B2 JP 2635967B2 JP 62133816 A JP62133816 A JP 62133816A JP 13381687 A JP13381687 A JP 13381687A JP 2635967 B2 JP2635967 B2 JP 2635967B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- frame
- ferroelectric liquid
- crystal device
- signal
- 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.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3622—Control of matrices with row and column drivers using a passive matrix
- G09G3/3644—Control of matrices with row and column drivers using a passive matrix with the matrix divided into sections
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0224—Details of interlacing
- G09G2310/0227—Details of interlacing related to multiple interlacing, i.e. involving more fields than just one odd field and one even field
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
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等の如き不完全な記憶特性をも
つと共に、その書き換えに一定の時間がかかる表示デバ
イスのための駆動方法に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving method for a display device, such as a ferroelectric liquid crystal, which has imperfect storage characteristics and requires a certain time for rewriting.
従来の技術 強誘電性液晶は不完全な記憶作用をもつ素子として知
られているが、斯る強誘電性液晶を使ったマトリックス
型表示パネルへ例えばパーソナルコンピュータから画像
信号を送って表示させる場合、パーソナルコンピュータ
の画像信号がテレビ信号等とは相違してノンインターレ
ース信号であり、その全フレームを使って表示すること
は強誘電性液晶の書き換えに要する時間の制約によって
実行できず、従って従来は例えば１フレームおきの画像
信号で書き換え表示していた。2. Description of the Related Art Ferroelectric liquid crystal is known as an element having an imperfect memory function, but when an image signal is sent from a personal computer to a matrix type display panel using such ferroelectric liquid crystal and displayed, for example, An image signal of a personal computer is a non-interlace signal unlike a television signal and the like, and display using all the frames cannot be performed due to a time limit required for rewriting the ferroelectric liquid crystal. The display was rewritten with the image signal of every other frame.
発明が解決しようとする問題点 パーソナルコンピュータからの画像信号の水平走査線
数Ｎ＝262、有効走査線数Ｍ＝200、フレーム周波数Ｓ＝
60Hzとした場合、１水平走査期間の画素の書き換え時間
ｒ＝400μｓの液晶材料を使うと、画面上のフレーム周
波数fFは、 となる。しかも、液晶の記憶特性が不完全なため、例え
ば数字「１」を表示し続けた場合でも、書き換え後、輝
度は第３図の如く少しずつ変化する。2. Problems to be Solved by the Invention The number of horizontal scanning lines N = 262, the number of effective scanning lines M = 200, the frame frequency S =
In the case of 60 Hz, when a liquid crystal material having a pixel rewriting time r = 400 μs in one horizontal scanning period is used, the frame frequency f F on the screen is Becomes Moreover, since the storage characteristics of the liquid crystal are incomplete, even if, for example, the number "1" is continuously displayed, the luminance changes little by little as shown in FIG. 3 after rewriting.
今、第３図においてラインL1、L2、L3、L4の画素に注
目すると、それらの輝度はそれぞれ（イ）（ロ）（ハ）
（ニ）の如くなり、縦４×横１の画素の合成輝度は
（ホ）のようになり、12.5Hzで変化する。人間の目は60
Hz以下の周波数変化に感応するので、前記の輝度変化は
フリッカとして画質を劣化させることになる。Now, focusing on the pixels of the lines L 1 , L 2 , L 3 , and L 4 in FIG. 3 , their luminances are (a), (b), and (c), respectively.
As shown in (d), the combined luminance of 4 × 1 pixels is as shown in (e) and changes at 12.5 Hz. The human eye is 60
Since it is sensitive to a frequency change of less than Hz, the above-mentioned change in luminance degrades image quality as flicker.
それ故に、本発明の目的は以上の問題を払拭した表示
デバイスの駆動方法を提供することにある。Therefore, an object of the present invention is to provide a driving method of a display device which has solved the above problems.
問題点を解決するための手段 本発明では、１水平走査期間の画素の書き換えにｒ秒
かかる強誘電性液晶デバイスへ有効走査線数Ｍ、フレー
ム周波数Ｓ［Hz］の順次走査信号を表示させる強誘電性
液晶デバイスの駆動方法において、ｒ＞1/（Ｍ×Ｓ）の
関係にあるとき、ｒ≦K/（Ｍ×Ｓ）の条件を満たす整数
Ｋ（Ｋは３以上の整数）を使って、第１フレームでは第
１番目、第（Ｋ＋１）番目、第（2K＋１）番目、・・・
の水平走査ラインを書き換え、第ｎフレームでは第ｎ番
目、第（2K＋ｎ）番目、第（3K＋ｎ）番目、・・・の水
平走査ラインを書き換え、第Ｋフレームでは第Ｋ番目、
第（2K）番目、第（3K）番目、・・・の水平走査ライン
を書き換えてＫフレームかけて全走査ラインを書き換え
る飛び越し走査をするようにしている。Means for Solving the Problems According to the present invention, a ferroelectric liquid crystal device that takes r seconds to rewrite a pixel during one horizontal scanning period displays a sequential scanning signal having an effective scanning line number M and a frame frequency S [Hz]. In the driving method of the dielectric liquid crystal device, when r> 1 / (M × S), an integer K (K is an integer of 3 or more) satisfying a condition of r ≦ K / (M × S) is used. , In the first frame, the first, (K + 1) th, (2K + 1) th,...
, In the n-th frame, the n-th, (2K + n) -th, (3K + n) -th,... Horizontal scanning lines are rewritten, and in the K-th frame, the K-th,
The (2K) -th, (3K) -th,... Horizontal scanning lines are rewritten, and interlaced scanning for rewriting all the scanning lines over K frames is performed.
作用 Ｎ＝262、Ｍ＝200、Ｓ＝60Hz、ｒ＝400μｓの場合に
ついて説明する。これらの数値をｒ≦K/（Ｍ×Ｓ）の式
に当てはめてＫの値を求めると、Ｋは５になる。Operation The case where N = 262, M = 200, S = 60 Hz, and r = 400 μs will be described. When these values are applied to the equation of r ≦ K / (M × S) to obtain the value of K, K becomes 5.
従って、第１フレームではライン１、６、11、…、19
6を書き換え、第２フレームではライン２、７、12、
…、197を書き換え、・・・、第５フレームでは５、1
0、15、…、200を書き換え５フレームで１画像を完成す
る。Therefore, in the first frame, lines 1, 6, 11,.
Rewrite 6, and in the second frame, lines 2, 7, 12,
..., rewrite 197, ..., 5 and 1 in the fifth frame
Rewrite 0, 15, ..., 200 to complete one image with 5 frames.
即ち、入力されてくる画像信号は1/60秒の間（画像信
号の１フレーム期間）に200本の有効走査線を有してい
るが、各フレームでそれらの有効走査線数200本を全て
は使わずに連続する５本の走査線のうち４本を捨てるの
である。That is, the input image signal has 200 effective scanning lines in 1/60 seconds (one frame period of the image signal), and all the 200 effective scanning lines are used in each frame. Is used, and four of the five consecutive scanning lines are discarded.
このようにすると、表示パネルの画面全体で見ると、
見かけ上62.5Hzで変化するように見え、従来の12.5Hzに
比べ、フリッカが目立たなくなる。This way, when you look at the entire display panel screen,
It appears to change at 62.5Hz, and flicker is less noticeable than at 12.5Hz.
実施例 第１図は本発明の実施例であり、同図のXYマトリック
ス型液晶表示パネル（１）において、（Y1）（Y2）…
（Y640）は第１の絶縁基板（図示せず）上に形成された
信号電極であり、（L1）（L2）…（LM）は第２の絶縁基
板（図示せず）上に形成された走査電極であって、これ
らの電極が形成された第１、第２の絶縁基板間には、上
述した強誘電性の液晶層が介入されている。Embodiment FIG. 1 shows an embodiment of the present invention. In the XY matrix type liquid crystal display panel (1) shown in FIG. 1, (Y 1 ) (Y 2 ).
(Y 640 ) is a signal electrode formed on a first insulating substrate (not shown), and (L 1 ) (L 2 )... (L M ) are on a second insulating substrate (not shown). The ferroelectric liquid crystal layer described above is interposed between the first and second insulating substrates on which these electrodes are formed.
前記信号電極（Y1）（Y2）…（Y640）に与えられる画
像データは入力信号（Ei）として端子（３）を通してシ
フトレジスタ（６）へ供給される。シフトレジスタ
（６）は前記信号電極に対応したＤフリップフロップ
（R1）（R2）…（R640）からなっており、そのデータ端
子に前記入力信号（Ei）が印加され、クロック端子に変
換回路（２）からの基本クロック（ｃ）があたえられ
て、データ信号を順次（R1）（R2）…（R640）の順序で
出力していく。The image data given to the signal electrodes (Y 1 ) (Y 2 )... (Y 640 ) is supplied to the shift register (6) through the terminal (3) as an input signal (Ei). The shift register (6) comprises D flip-flops (R 1 ) (R 2 )... (R 640 ) corresponding to the signal electrodes, the input signal (Ei) is applied to its data terminal, and the clock terminal is connected to the clock terminal. The basic clock (c) from the conversion circuit (2) is given, and the data signals are sequentially output in the order of (R 1 ) (R 2 )... (R 640 ).
これらの転送は水平クロック（c1）をクロックとする
Ｄフリップフロップ（r1）（r2）…（r640）に保持さ
れ、その保持データに対応した電圧波形がドライバ
（d1）（d2）…（d640）を通して信号電極（Y1）（Y2）
…（Y640）へ入力される。These transfers are held in D flip-flops (r 1 ) (r 2 )... (R 640 ) using the horizontal clock (c 1) as a clock, and voltage waveforms corresponding to the held data are output to the drivers (d 1 ) (d 2 ) ... (signal electrodes through d 640) (Y 1) ( Y 2)
... ( Y640 ) is input.
変換回路（２）は水平同期パルス（HP）と垂直同期パ
ルス（VP）を入力して前記基本クロック（ｃ）及び水平
クロック（c1）を形成する他に、選択信号（U1）（U2）
…（UK）を発生する。選択信号（U1）（U2）…（UK）は
１フレームでいずれか１つがハイレベルとなり、しかも
そのハイレベルはフレーム毎に順次歩進する。The conversion circuit (2) receives the horizontal synchronizing pulse (HP) and the vertical synchronizing pulse (VP) to form the basic clock (c) and the horizontal clock (c1), as well as selecting signals (U 1 ) and (U 2 ). )
... (U K ) is generated. One of the selection signals (U 1 ) (U 2 )... (U K ) is at a high level in one frame, and the high level is sequentially advanced for each frame.
即ち、第２図に示すように第１フレームでは選択信号
（U1）が、第２フレームでは選択信号（U2）がそれぞれ
ハイレベルとなる。又、図示はしていないが、第Ｋフレ
ームでは（UK）がハイレベルとなる。That is, as shown in FIG. 2, the selection signal (U 1 ) is at a high level in the first frame, and the selection signal (U 2 ) is at the high level in the second frame. Although not shown, (U K ) is at a high level in the K-th frame.
選択信号（U1）を受けるＤフリップフロップ（b1）
（bK+1）…（a1）（aK+1）…を介して走査電極（L1）
（LK+1）…に印加される。同様に選択信号（U2）を受け
るＤフリップフロップ（b2）（bK+2）…は水平クロック
（c1）をクロックとし順次選択信号（U1）を転送し、そ
のデータに対応した電圧波形がドライバ（a2）（aK+2）
…を介して走査電極（L2）（LK+2）…に書き換え信号を
与え、又選択信号（UK）に関しても同様に所定の走査電
極に書き換え信号が与えられる。D flip-flop for receiving a selection signal (U 1) (b 1)
Scan electrode (L 1 ) via (b K + 1 ) ... (a 1 ) (a K + 1 ) ...
(L K + 1 ). Similarly, the D flip-flops (b 2 ) (b K + 2 )... Receiving the selection signal (U 2 ) sequentially transfer the selection signal (U 1 ) using the horizontal clock (c 1) as a clock and apply a voltage corresponding to the data. waveform driver (a 2) (a K + 2)
, A rewrite signal is applied to the scan electrodes (L 2 ) (L K + 2 )..., And a select signal (U K ) is similarly applied to a predetermined scan electrode.
その結果、本実施例では第２図の信号ドライバ出力
（Ｄ）に一部を示すように第１フレームでは、ライン
（L1）、（LK+1）、…が書き換えられ、第２フレームで
はライン（L2）、（LK+2）、…が書き換えられ、第Ｋフ
レームではライン（Ｌα）、（ＬＫ＋α）…が書き換え
られてＫフレームで全部の水平走査ラインが書き換えら
れることになる。As a result, in the present embodiment, the lines (L 1 ), (L K + 1 ),... Are rewritten in the first frame as partially shown in the signal driver output (D) in FIG. , The lines (L 2 ), (L K + 2 ),... Are rewritten, and in the Kth frame, the lines (L α ), (L K + α ) are rewritten, and all the horizontal scanning lines are rewritten in the K frame. become.
Ｋ＝３の場合には１フレームにつき２走査ラインおき
に書き換えがなされるが、Ｋの値は次のような方法で決
定するのが適当である。入力信号の１水平走査期間［即
ち、1/（有効走査線数Ｍ×フレーム周波数Ｓ）］が、強
誘電性液晶デバイスの１水平走査期間の画素を書き換え
に要する時間（ｒ）より短い場合、即ち液晶の書き換え
時間が遅く表示速度に間に合わない場合において、 有効走査線数Ｍ×フレーム周波数Ｓ ×１水平走査期間の画素を書き換えに要する時間ｒ の値よりも大きな整数をＫに設定することにより、使用
する強誘電性液晶デバイスの書き換えに要する時間を応
じた最適な整数Ｋの値を設定できる。When K = 3, rewriting is performed every two scanning lines per frame, but the value of K is suitably determined by the following method. When one horizontal scanning period [that is, 1 / (effective scanning line number M × frame frequency S)] of the input signal is shorter than the time (r) required for rewriting pixels in one horizontal scanning period of the ferroelectric liquid crystal device, That is, in the case where the rewriting time of the liquid crystal is too slow to meet the display speed, an integer larger than the value of the number r of effective scanning lines × the frame frequency S × the time r required for rewriting the pixels in the horizontal scanning period is set to K. It is possible to set an optimal value of the integer K according to the time required for rewriting the ferroelectric liquid crystal device to be used.
以上において、本発明を実施例に沿って説明したが、
本発明は上記実に限定されるべきものではなく、特許請
求の範囲に記載した発明の要旨を逸脱しない範囲内で種
々の変更、修正が可能であり、例えば上述の液晶表示デ
バイスだけでなく、他の表示デバイスにも適用できる。In the above, the present invention has been described along with the embodiments,
The present invention is not really limited to the above, and various changes and modifications can be made without departing from the scope of the invention described in the claims. For example, not only the liquid crystal display device described above, but also other It can also be applied to display devices.
発明の効果 以上の通り本発明によれば、不完全な記憶特性をも
ち、その１水平走査期間の画素の書き換えに長時間を要
する表示デバイスにおいて、１フレームの書き換え時間
をフリッカが目立たないように見掛け上、早くしたもの
で画質が向上するという効果があり、極めて有効であ
る。Advantageous Effects of the Invention As described above, according to the present invention, in a display device having incomplete storage characteristics and requiring a long time to rewrite pixels during one horizontal scanning period, the rewriting time of one frame is reduced so that flicker is not noticeable. Apparently, there is an effect that the image quality is improved by speeding up the operation, which is extremely effective.
第１図は本発明方法を実施した表示デバイスの回路構成
図であり、第２図はその各部の信号波形図である。第３
図は従来例に関する説明図である。 （１）……液晶表示パネル、（L1）〜（LM）……走査電
極、（Y1）〜（Y640）……信号電極。FIG. 1 is a circuit configuration diagram of a display device in which the method of the present invention is implemented, and FIG. 2 is a signal waveform diagram of each part thereof. Third
The figure is an explanatory diagram relating to a conventional example. (1) Liquid crystal display panel, (L 1 ) to (L M ): scanning electrode, (Y 1 ) to (Y 640 ): signal electrode.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−272777（ＪＰ，Ａ) 特開 昭62−221281（ＪＰ，Ａ) 特開 昭57−201294（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-272777 (JP, A) JP-A-62-221281 (JP, A) JP-A-57-201294 (JP, A)
Claims (1)
かる強誘電性液晶デバイスへ有効走査線数Ｍ、フレーム
周波数Ｓ［Hz］の順次走査信号を表示させる強誘電性液
晶デバイスの駆動方法において、 ｒ＞1/（Ｍ×Ｓ）の関係にあるとき、ｒ≦K/（Ｍ×Ｓ）
の条件を満たす整数Ｋ（Ｋは３以上の整数）を使って、 第１フレームでは第１番目、第（Ｋ＋１）番目、第（2K
＋１）番目、・・・の水平走査ラインを書き換え、 第ｎフレームでは第ｎ番目、第（2K＋ｎ）番目、第（3K
＋ｎ）番目、・・・の水平走査ラインを書き換え、 第Ｋフレームでは第Ｋ番目、第（2K）番目、第（3K）番
目、・・・の水平走査ラインを書き換えてＫフレームか
けて全走査ラインを書き換える飛び越し走査をしたこと
を特徴とする強誘電性液晶デバイスの駆動方法（但し、
Ｍは整数、ｎは１＜ｎ＜Ｋの条件を満たす自然数、Ｓ、
ｒは正の実数）。1. A method of driving a ferroelectric liquid crystal device which displays a sequential scanning signal having an effective scanning line number M and a frame frequency S [Hz] on a ferroelectric liquid crystal device which takes r seconds to rewrite a pixel in one horizontal scanning period. In a case where r> 1 / (M × S), r ≦ K / (M × S)
In the first frame, the first, (K + 1) th, and (2K
+1),... Horizontal scanning lines, and in the n-th frame, the n-th, (2K + n) -th, (3K) -th
+ N) -th horizontal scanning lines are rewritten. In the K-th frame, the K-th, (2K) -th, (3K) -th,. Driving method of ferroelectric liquid crystal device characterized by interlaced scanning for rewriting lines (however,
M is an integer, n is a natural number satisfying the condition of 1 <n <K, S,
r is a positive real number).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133816A JP2635967B2 (en) | 1987-05-29 | 1987-05-29 | Driving method of ferroelectric liquid crystal device |
| DE19883853697 DE3853697T2 (en) | 1987-05-29 | 1988-05-27 | Display device and control system therefor. |
| EP19880304846 EP0293235B1 (en) | 1987-05-29 | 1988-05-27 | Display device and driving system thereof |
| US07/879,459 US5298913A (en) | 1987-05-29 | 1992-05-04 | Ferroelectric liquid crystal display device and driving system thereof for driving the display by an integrated scanning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62133816A JP2635967B2 (en) | 1987-05-29 | 1987-05-29 | Driving method of ferroelectric liquid crystal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63298286A JPS63298286A (en) | 1988-12-06 |
| JP2635967B2 true JP2635967B2 (en) | 1997-07-30 |
Family
ID=15113712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62133816A Expired - Lifetime JP2635967B2 (en) | 1987-05-29 | 1987-05-29 | Driving method of ferroelectric liquid crystal device |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0293235B1 (en) |
| JP (1) | JP2635967B2 (en) |
| DE (1) | DE3853697T2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3930259A1 (en) * | 1989-09-11 | 1991-03-21 | Thomson Brandt Gmbh | CONTROL CIRCUIT FOR A LIQUID CRYSTAL DISPLAY |
| KR920006903A (en) * | 1990-09-27 | 1992-04-28 | 쯔지 하루오 | Control Method and Display Control Device of LCD |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57201294A (en) * | 1981-06-04 | 1982-12-09 | Suwa Seikosha Kk | Matrix type video display unit |
| JPS6180226A (en) * | 1984-09-28 | 1986-04-23 | Toshiba Corp | Active matrix driving device |
-
1987
- 1987-05-29 JP JP62133816A patent/JP2635967B2/en not_active Expired - Lifetime
-
1988
- 1988-05-27 DE DE19883853697 patent/DE3853697T2/en not_active Expired - Lifetime
- 1988-05-27 EP EP19880304846 patent/EP0293235B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE3853697D1 (en) | 1995-06-08 |
| DE3853697T2 (en) | 1996-01-11 |
| EP0293235A2 (en) | 1988-11-30 |
| EP0293235B1 (en) | 1995-05-03 |
| JPS63298286A (en) | 1988-12-06 |
| EP0293235A3 (en) | 1990-03-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0382567B1 (en) | Liquid crystal display device and driving method therefor | |
| US6628253B1 (en) | Picture display device and method of driving the same | |
| US4779085A (en) | Matrix display panel having alternating scan pulses generated within one frame scan period | |
| JP3230755B2 (en) | Matrix driving method for flat display device | |
| JPH07239463A (en) | Active matrix type display device and its display method | |
| JPS60257497A (en) | Driving of liquid crystal display | |
| JP2003255915A (en) | Display device and its driving method | |
| US5298913A (en) | Ferroelectric liquid crystal display device and driving system thereof for driving the display by an integrated scanning method | |
| JP3110618B2 (en) | Liquid crystal display | |
| JPS6371889A (en) | Drive circuit for display device | |
| JPH07140933A (en) | Method for driving liquid crystal display device | |
| JP2635967B2 (en) | Driving method of ferroelectric liquid crystal device | |
| JP2874190B2 (en) | Liquid crystal display device | |
| JPH05313608A (en) | Driving device of liquid crystal display panel | |
| JPH06101830B2 (en) | Image display method | |
| JPH0458036B2 (en) | ||
| JPS648831B2 (en) | ||
| JPH04140716A (en) | Liquid crystal display device | |
| JPH03172085A (en) | Liquid crystal display device | |
| JPS59111622A (en) | Liquid-crystal display type picture receiver | |
| JPS63304294A (en) | Liquid crystal display device | |
| JPH06105390B2 (en) | Liquid crystal device signal transfer method | |
| JP2000029437A (en) | Display driving circuit | |
| JP3919373B2 (en) | Liquid crystal display | |
| JPS61213897A (en) | Image display unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080425 Year of fee payment: 11 |