JP2001290121A - Driving method for liquid crystal display device - Google Patents

Driving method for liquid crystal display device

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Publication number
JP2001290121A
JP2001290121A JP2000107909A JP2000107909A JP2001290121A JP 2001290121 A JP2001290121 A JP 2001290121A JP 2000107909 A JP2000107909 A JP 2000107909A JP 2000107909 A JP2000107909 A JP 2000107909A JP 2001290121 A JP2001290121 A JP 2001290121A
Authority
JP
Japan
Prior art keywords
voltage
liquid crystal
vcr
crystal display
setting
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
Application number
JP2000107909A
Other languages
Japanese (ja)
Other versions
JP3565324B2 (en
Inventor
Nobukazu Nagae
伸和 長江
Tatsuo Uchida
龍男 内田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
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Filing date
Publication date
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Priority to JP2000107909A priority Critical patent/JP3565324B2/en
Publication of JP2001290121A publication Critical patent/JP2001290121A/en
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Abstract

PROBLEM TO BE SOLVED: To solve the problem that the speed of a response characteristic in bend orientation is several ten times as fast as that in a TN(twisted nematic) system, but, liquid crystal material having a response speed (≪3 msec) is needed in a field sequential system, and, liquid crystal material for practical use is not yet developed at a present point of time. SOLUTION: In the field sequential system, bend orientation at the time of a drive can be stabilized by setting the lowest setting voltage of a low voltage side to a voltage lower on the average than a bend transition voltage Vcr while setting the lowest setting voltage of the low voltage side to a voltage Vs lower than the Vcr when a back light is lighted and to a voltage V1 higher than the Vcr when the back light is not lighted. A cell gap can be made smaller as a result of this and the response speed is increased by setting the lowest side of a driving voltage to the voltage side lower than the Vcr. Thus, since field sequentiality is attained without restricting values of physical properties of the liquid crystal material, a high definition and highly luminescent liquid crystal display device can be provided at low cost.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、多人数で見る携帯
情報端末、パソコン、ワープロ、アミューズメント機
器、テレビなどの平面ディスプレイ、シャッタ効果を利
用した表示板、窓、扉、壁などに用いる液晶表示装置の
駆動方法に関する。
The present invention relates to a portable information terminal, a personal computer, a word processor, an amusement device, a flat panel display such as a television set, a display plate using a shutter effect, a liquid crystal display used for a window, a door, a wall, etc. The present invention relates to a method for driving the device.

【0002】[0002]

【従来の技術】従来、ネマティック液晶を用いたTN
(ツイスティッドネマティック)型、STN(スーパー
ツイスティッドネマティック)型など電気光学効果を利
用した液晶表示装置が実用化されている。これらは、カ
ラー表示に際し、カラーフィルターを要するため、光の
利用効率が1/3以下であり、その結果、暗い画面表示あ
るいは消費電力が大きくなっていた。また、RGB
(赤、緑、青)毎に画素を使用させなければならず、実
際の表示絵素数は表示画素数の3分の1となるため、画
面サイズの割に高精細化が困難であった。
2. Description of the Related Art Conventionally, a TN using a nematic liquid crystal is used.
Liquid crystal display devices utilizing an electro-optic effect, such as a (twisted nematic) type and an STN (super twisted nematic) type, have been put to practical use. Since a color filter is required for color display, the light use efficiency is 1/3 or less, and as a result, dark screen display or power consumption is increased. Also, RGB
Pixels must be used for each of the colors (red, green, and blue), and the actual number of display pixels is one third of the number of display pixels. Therefore, it has been difficult to achieve high definition for the screen size.

【0003】最近、図1に示すように、バックライトを
順次RGB毎に面発光させて、それにともない液晶パネ
ルにRGBそれぞれの画像を同期させて表示させること
によりカラー表示を行うフィールド・シーケンシャル方
式が提案されている。
Recently, as shown in FIG. 1, there is a field sequential system in which a backlight is sequentially illuminated for each of RGB, and a color display is performed by synchronizing and displaying each image of RGB on a liquid crystal panel. Proposed.

【0004】これは人間の目にちらつきを感じさせない
ようにするため、1/60秒以下でR、G、B一組の画
像を順次高速に切り換えてカラー表示を行う方式であ
る。すなわち、1/180秒以内に液晶の各画素信号に
対応した電圧設定と印加、液晶応答、バックライト発光
の一連の処理を行っている。
In this system, a set of R, G, and B images is sequentially switched at a high speed in 1/60 seconds or less to perform color display so that human eyes do not feel flickering. That is, a series of processes of voltage setting and application, liquid crystal response, and backlight emission corresponding to each pixel signal of the liquid crystal are performed within 1/180 second.

【0005】特に、1/180秒(約5.5ミリ秒)以
内に液晶の各画素信号電圧印加時間を約1ミリ秒に、バ
ックライト発光時間を約1.5ミリ秒に設定すると、液
晶の応答時間は3ミリ秒以下という高速応答性が要求さ
れる。そのため、TN(ツイストネマティック)の数十
倍の応答速度を有するベンド配向が注目されてきてい
る。
In particular, if the application time of each pixel signal voltage of the liquid crystal is set to about 1 millisecond and the backlight emission time is set to about 1.5 milliseconds within 1/180 second (about 5.5 milliseconds), Requires a high-speed response time of 3 milliseconds or less. Therefore, attention has been paid to bend alignment having a response speed several tens of times that of TN (twisted nematic).

【0006】[0006]

【発明が解決しようとする課題】ベンド配向における応
答特性はTN(ツイストネマチック)方式より数十倍高
速であるが、フィールド・シーケンシャル方式で要求さ
れる応答速度(3ミリ秒以下)とするには、液晶材料の
物性値の設計が非常に重要となる。しかし、応答速度の
みに重点をおいた液晶材料では他の特性である保持率や
焼き付き等に悪影響を及ぼすため実際に使用するには液
晶材料の各物性値を最適化する必要がある。しかし、こ
れには時間と費用が多く必要とされ、現時点でまだ実用
に耐える材料が開発されていない。
The response characteristic in the bend orientation is several tens of times faster than that of the TN (twisted nematic) system. However, to achieve the response speed (3 ms or less) required by the field sequential system. The design of the physical properties of the liquid crystal material is very important. However, a liquid crystal material that focuses only on the response speed adversely affects other characteristics such as a retention rate and image sticking, so that it is necessary to optimize each physical property value of the liquid crystal material for actual use. However, this requires a lot of time and money, and a material that can be used practically has not yet been developed.

【0007】SID’98(p143〜p146)にお
いて、IBMが「ベンド配向維持電圧より下の電圧に液
晶印加電圧を下げた後、維持電圧より高い電圧を液晶に
印加するという電圧の設定値を交互に変化させる」方法
を発表している。これは通常のTFTパネルにおいて、
いったん黒表示を出してから白表示にすることであり、
目の感じる感覚をCRTと同じようにする手法である。
この方法では黒表示した後、白表示するためバックライ
トのエネルギー効率が悪い。
In SID '98 (pp. 143 to p. 146), IBM states that “After setting the liquid crystal application voltage to a voltage lower than the bend alignment maintenance voltage, the voltage set value for applying a voltage higher than the maintenance voltage to the liquid crystal is changed. To change it. " This is a normal TFT panel.
It is to display black once and then display white,
This is a technique to make the sensation felt by the eyes the same as a CRT.
In this method, after black display is performed, white display is performed, so that the energy efficiency of the backlight is low.

【0008】本発明は、上記問題点を解決して高精細、
高輝度で表示品位の高い液晶表示装置の駆動方法を提供
することができる。
[0008] The present invention solves the above-mentioned problems and achieves high definition,
A method for driving a liquid crystal display device with high luminance and high display quality can be provided.

【0009】[0009]

【課題を解決するための手段】本発明の液晶表示装置の
駆動方法は、液晶の電圧に対する光学応答とRGB3色
切替のバックライト発光とを同期させて駆動する液晶表
示素子であり、液晶分子の配向がベンド配向である液晶
表示装置の駆動方法において、駆動電圧の最も低い設定
値が、ベンド配向を維持するための電圧より低い電圧で
あることを特徴とする。
A method of driving a liquid crystal display device according to the present invention is a liquid crystal display device that drives the optical response to the voltage of the liquid crystal in synchronization with the backlight emission of RGB three-color switching. In a method for driving a liquid crystal display device in which the alignment is a bend alignment, the lowest set value of the drive voltage is a voltage lower than a voltage for maintaining the bend alignment.

【0010】また、バックライト非点灯時には、液晶に
印加される電圧が、供給可能な電圧の最も高い電圧であ
れば良い。
When the backlight is not lit, the voltage applied to the liquid crystal only needs to be the highest voltage that can be supplied.

【0011】また、最低設定電圧Vsと最高設定電圧V
lおよびベンド転移電圧Vcr、バックライト発光時間
t1、バックライト非発光時間t2とすると、(t1+
t2)*Vcr2≦t2*Vl2+t1*Vs2、の関係
を満たせれば良い。
Further, a minimum set voltage Vs and a maximum set voltage V
l, bend transition voltage Vcr, backlight emission time t1, and backlight non-emission time t2, (t1 +
t2) * Vcr 2 ≦ t2 * Vl 2 + t1 * Vs 2 .

【0012】上記構成による作用を説明する。The operation of the above configuration will be described.

【0013】本発明は、図2に示すように、フィールド
・シーケンシャル方式において、R、G、B一組の画像
を順次高速に切り換えてカラー表示を行う。R、G、B
各々の画像を表示する期間において、バックライト発光
時間(t1)には低電圧側の最低設定電圧を、ベンド配
向を維持するための電圧(以後Vcr)より低い電圧V
sに、バックライト非発光時間(t2)にはVcrより
高い電圧Vlに設定することで、平均的にVcrより高
い電圧に設定することができ、駆動時のベンド配向を安
定化させることが可能となる。特に、駆動電圧範囲を通
常より広く設定することができるため屈折率異方性(Δ
n:電圧によって変化する)を大きくすることができ
る。OCBモードのような複屈折効果を用いた表示方式
におけるリタデーション(δ=Δn・d:dはセルギャ
ップ)を一定とした場合、Δnを大きくすることでセル
ギャップdを小さくすることが可能となる。その結果、
液晶の応答速度はdの2乗に比例すると考えられている
のでdを小さくすることで応答速度を速くすることがで
きる。特に応答速度が速くなることで、R、G、B一組
の画像を人間の目のちらつきを感じさせないスピードで
順次高速に切り替えることが可能である。以上のことに
より高精細、高輝度の表示品位の高い液晶表示装置の駆
動方法を提供することができる。
According to the present invention, as shown in FIG. 2, in a field sequential system, a set of R, G, and B images is sequentially switched at high speed to perform color display. R, G, B
In a period during which each image is displayed, the minimum set voltage on the low voltage side is set to a voltage V lower than the voltage for maintaining the bend alignment (hereinafter, Vcr) during the backlight emission time (t1).
In addition, by setting the voltage Vl higher than Vcr during the backlight non-emission time (t2), the voltage can be set higher than Vcr on average, and the bend alignment during driving can be stabilized. Becomes In particular, since the drive voltage range can be set wider than usual, the refractive index anisotropy (Δ
n: varies with voltage). When the retardation (δ = Δnd · d: d is a cell gap) in a display method using a birefringence effect such as the OCB mode is constant, the cell gap d can be reduced by increasing Δn. . as a result,
Since the response speed of the liquid crystal is considered to be proportional to the square of d, the response speed can be increased by reducing d. In particular, by increasing the response speed, it is possible to sequentially switch a set of R, G, and B images at a high speed at a speed that does not cause human eyes to flicker. As described above, a driving method of a liquid crystal display device with high definition and high luminance and high display quality can be provided.

【0014】すなわち、液晶材料の物性値をせまく限定
する必要なく、駆動方法により応答速度を速くすること
ができる。それによって高精細、高輝度で表示品位の高
い液晶表示装置の駆動方法を提供することができる。
That is, the response speed can be increased by the driving method without having to limit the physical properties of the liquid crystal material. Thus, a driving method of a liquid crystal display device with high definition, high luminance, and high display quality can be provided.

【0015】また、上記の関係式を満足しない場合は、
液晶に印加する電圧の平均電圧の二乗がベンド配向転移
電圧Vcrの二乗以下となってしまい、ベンド配向状態
を維持することができなくなる。従って、最低設定電圧
Vs、最高設定電圧Vl、ベンド転移電圧Vcr、バッ
クライト発光時間t1、バックライト非発光時間t2
は、上記の関係を満たすことにより、高精細、高輝度の
表示品位の高い液晶表示装置の駆動方法を提供すること
ができる。
If the above relational expression is not satisfied,
The square of the average voltage of the voltage applied to the liquid crystal is equal to or less than the square of the bend alignment transition voltage Vcr, and the bend alignment state cannot be maintained. Therefore, the minimum set voltage Vs, the maximum set voltage Vl, the bend transition voltage Vcr, the backlight emission time t1, the backlight non-emission time t2
By satisfying the above relationship, it is possible to provide a driving method of a liquid crystal display device with high definition and high luminance and high display quality.

【0016】[0016]

【発明の実施の形態】(液晶)一般的なネマチック液晶
を用いることができる。しかし、応答速度を数ミリ秒に
するため、 屈折率異方性Δnの高いものや粘性率ηの
低いものを用いるのが好ましい。
DESCRIPTION OF THE PREFERRED EMBODIMENTS (Liquid Crystal) A general nematic liquid crystal can be used. However, in order to make the response speed several milliseconds, it is preferable to use a material having a high refractive index anisotropy Δn or a material having a low viscosity η.

【0017】(配向膜)配向膜は、水平配向性配向膜を
使用することが望ましい。比較的高プレチルト(>3
°)以上のものを使うことが望ましい。プレチルトが低
すぎるとバイアス電圧を印加したときに配向状態がスプ
レイ配向からベンド配向に転移しない可能性がある。
(Alignment Film) It is desirable to use a horizontal alignment film as the alignment film. Relatively high pretilt (> 3
°) It is desirable to use more. If the pretilt is too low, the orientation state may not transition from the splay orientation to the bend orientation when a bias voltage is applied.

【0018】(基板)全画面の画素電圧設定を1ミリ秒
以下で完了する基板であることが望ましい。例えばポリ
シリコン等を用いることが望ましい。
(Substrate) It is desirable that the substrate completes pixel voltage setting for the entire screen in 1 millisecond or less. For example, it is desirable to use polysilicon or the like.

【0019】(駆動方法)最低設定電圧をVs、最高設
定電圧をVl、ベンド転移電圧Vcr、バックライト発
光時間t1とバックライト非発光時間t2とすると、 (t1+t2)*Vcr2≦t2*Vl2+t1*V
2、 の関係を満たすことが望ましい。上式を満足しない場合
は、液晶に印加する電圧の平均電圧の二乗がベンド配向
転移電圧Vcrの二乗以下となってしまい、ベンド配向
状態を維持することができなくなる。
(Driving method) Assuming that the minimum set voltage is Vs, the maximum set voltage is V1, the bend transition voltage Vcr, the backlight emission time t1 and the backlight non-emission time t2 are (t1 + t2) * Vcr 2 ≦ t2 * Vl 2 + T1 * V
It is desirable to satisfy the relationship of s 2 , If the above expression is not satisfied, the square of the average voltage of the voltage applied to the liquid crystal is not more than the square of the bend alignment transition voltage Vcr, and the bend alignment state cannot be maintained.

【0020】(実施例)次に実施例によってこの発明を
さらに具体的に説明する。マトリクス状に画素電極が配
置されたポリシリコンTFTセルにネマティック液晶
(メルク社製(ZLI4801−100))を注入し、
セル厚5.2μmの液晶セルを作製した。バイアス電圧
6Vを印加し、液晶の配向をスプレイ配向からベンド配
向へ変化させた。つづいて図3(A)に示すように、バ
ックライト発光時間(t1)303の1.5ミリ秒にお
いては、ベンド配向転移電圧(Vcr)2.2Vより低
い最低設定電圧(Vs)301の1.0Vを、バックラ
イト非発光時間(t2)304の4.0ミリ秒において
は、ベンド配向転移電圧Vcrより高い電圧(Vl)3
02の6.0Vをネマチック液晶に印加した。
(Embodiments) The present invention will be described more specifically with reference to embodiments. A nematic liquid crystal (Merck (ZLI4801-100)) is injected into a polysilicon TFT cell having pixel electrodes arranged in a matrix,
A liquid crystal cell having a cell thickness of 5.2 μm was produced. A bias voltage of 6 V was applied to change the alignment of the liquid crystal from the splay alignment to the bend alignment. Subsequently, as shown in FIG. 3A, at the backlight emission time (t1) 303 of 1.5 milliseconds, the minimum set voltage (Vs) 301 lower than the bend alignment transition voltage (Vcr) 2.2 V In the backlight non-light emission time (t2) 304 of 4.0 milliseconds, a voltage (Vl) 3 higher than the bend alignment transition voltage Vcr was applied.
02 was applied to the nematic liquid crystal.

【0021】クロスニコル下において画面は白表示で安
定していた。なお、応答速度は黒表示から白表示への状
態変化で2ミリ秒であった。
Under crossed Nicols, the screen was stable in white display. The response speed was 2 milliseconds in the state change from black display to white display.

【0022】つづいて、RGB切替バックライトと同期
させてセルを駆動させて表示させたところ動画像がちら
つきなく表示できた。
Subsequently, when the cell was driven and displayed in synchronization with the RGB switching backlight, a moving image could be displayed without flicker.

【0023】(比較例1)実施例と同様なセル厚5.2
μmのセルに液晶を注入し、実施例と同様にベンド配向
に変化させ図3(B)に示すようなベンド配向転移電圧
(Vcr)の反転駆動信号を供給した。セル厚が小さ
く、位相差が1/2波長分より足らないため、黒表示の
電圧印加時に光漏れが発生し、コントラストが低くなっ
てしまった。
(Comparative Example 1) Cell thickness 5.2 similar to Example
Liquid crystal was injected into a μm cell and changed to bend alignment in the same manner as in the example, and an inversion drive signal of a bend alignment transition voltage (Vcr) as shown in FIG. 3B was supplied. Since the cell thickness was small and the phase difference was less than half the wavelength, light leakage occurred when a black display voltage was applied, resulting in low contrast.

【0024】(比較例2)比較例1において光漏れのな
いようにセル厚を8.7μmと大きくしたセルに液晶を
注入し、白黒になるよう図3(B)に示す駆動信号を印
加した。しかしセル厚が大きいためその応答速度は5ミ
リ秒とフィールド・シーケンシャル駆動用としては遅く
なった。該セルとRGB切替発光バックライトと同期さ
せたところ画面の応答がバックライト切替に追いつくこ
とができなくて正常に画面表示することができなかっ
た。
(Comparative Example 2) In Comparative Example 1, liquid crystal was injected into a cell whose cell thickness was increased to 8.7 μm to prevent light leakage, and a driving signal shown in FIG. . However, due to the large cell thickness, the response speed was 5 ms, which was slow for field sequential driving. When the cell was synchronized with the RGB switching light emitting backlight, the screen response could not catch up with the backlight switching and the screen could not be displayed normally.

【0025】[0025]

【発明の効果】以上のように本発明によれば、駆動電圧
の低電圧側をVcr低電圧側に設定することで結果的に
はセルギャップdを小さくすることができ応答速度を速
くすることができる。
As described above, according to the present invention, by setting the low voltage side of the driving voltage to the Vcr low voltage side, the cell gap d can be reduced as a result and the response speed can be increased. Can be.

【0026】それによって液晶材料の物性値を強く限定
する必要なしにフィールド・シーケンシャルが可能とな
るので低コストで高精細、高輝度の液晶表示装置を提供
することができる。
As a result, field sequential can be performed without the need to strongly limit the physical properties of the liquid crystal material, so that a low-cost, high-definition, high-brightness liquid crystal display device can be provided.

【図面の簡単な説明】[Brief description of the drawings]

【図1】フィールド・シーケンシャルの駆動概念図であ
る。
FIG. 1 is a conceptual diagram of driving of field sequential.

【図2】本発明の駆動方法の概念図である。FIG. 2 is a conceptual diagram of a driving method according to the present invention.

【図3】(A)は実施例の駆動用波形、(B)は比較例
2における駆動用波形である。
3A is a driving waveform of an example, and FIG. 3B is a driving waveform of a comparative example 2. FIG.

【符号の説明】[Explanation of symbols]

Vl 最高設定電圧 Vcr ベンド転移電圧 Vs 最低設定電圧 t1 バックライト発光時間 t2 バックライト非発光時間 301 最低設定電圧 302 最高設定電圧 303 バックライト発光時間 304 バックライト非発光時間 Vl Maximum setting voltage Vcr Bend transition voltage Vs Minimum setting voltage t1 Backlight emission time t2 Backlight non-lighting time 301 Minimum setting voltage 302 Maximum setting voltage 303 Backlight emission time 304 Backlight non-lighting time

───────────────────────────────────────────────────── フロントページの続き Fターム(参考) 2H093 NA65 NC34 NC44 ND10 ND17 ND20 ND33 ND52 NE04 NE06 NH18 5C006 AA11 AA22 AC24 AF44 AF51 BA19 BB11 FA14 5C080 AA10 BB05 CC03 DD08 EE29 EE30 FF07 FF09 JJ04  ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H093 NA65 NC34 NC44 ND10 ND17 ND20 ND33 ND52 NE04 NE06 NH18 5C006 AA11 AA22 AC24 AF44 AF51 BA19 BB11 FA14 5C080 AA10 BB05 CC03 DD08 EE29 EE30 FF07 FF09 JJ04

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 液晶の駆動電圧に対する光学応答とRG
B3色切替のバックライト発光とを同期させて駆動する
液晶表示素子の分子配向が、ベンド配向である液晶表示
装置の駆動方法において、 前記駆動電圧の最も低い設定値が、ベンド配向を維持す
るための電圧より低い電圧であることを特徴とする液晶
表示装置の駆動方法。
1. Optical response and RG of a liquid crystal to a driving voltage
In a method of driving a liquid crystal display device in which the liquid crystal display element driven in synchronization with the backlight emission of B3 color switching is a bend alignment, the lowest set value of the drive voltage is to maintain the bend alignment. A method for driving a liquid crystal display device, wherein the voltage is lower than the voltage of the liquid crystal display device.
【請求項2】 バックライト非点灯時には、液晶に印加
される駆動電圧が、供給可能な最も高い電圧であること
を特徴とする請求項1記載の液晶表示装置の駆動方法。
2. The method according to claim 1, wherein the driving voltage applied to the liquid crystal when the backlight is off is the highest voltage that can be supplied.
【請求項3】 最低設定電圧Vsと最高設定電圧Vlお
よびベンド転移電圧Vcr、バックライト発光時間t
1、バックライト非発光時間t2とすると、 (t1+t2)*Vcr2≦t2*Vl2+t1*V
2、 の関係を満たすことを特徴とする請求項1、2記載の液
晶表示装置の駆動方法。
3. A minimum set voltage Vs, a maximum set voltage Vl, a bend transition voltage Vcr, and a backlight emission time t.
1. Assuming that the backlight non-emission time is t2, (t1 + t2) * Vcr 2 ≦ t2 * Vl 2 + t1 * V
3. The driving method for a liquid crystal display device according to claim 1, wherein the following relationship is satisfied.
JP2000107909A 2000-04-10 2000-04-10 Driving method of liquid crystal display device Expired - Lifetime JP3565324B2 (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002031790A (en) * 2000-07-14 2002-01-31 Matsushita Electric Ind Co Ltd Driving method of liquid crystal display device and liquid crystal display device
JP2006162959A (en) * 2004-12-07 2006-06-22 Tohoku Univ Color liquid crystal display device
US7202864B2 (en) 2001-12-27 2007-04-10 Lg.Philips Lcd Co., Ltd. Apparatus and method for driving a liquid crystal display

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002031790A (en) * 2000-07-14 2002-01-31 Matsushita Electric Ind Co Ltd Driving method of liquid crystal display device and liquid crystal display device
US7202864B2 (en) 2001-12-27 2007-04-10 Lg.Philips Lcd Co., Ltd. Apparatus and method for driving a liquid crystal display
JP2006162959A (en) * 2004-12-07 2006-06-22 Tohoku Univ Color liquid crystal display device
JP4622494B2 (en) * 2004-12-07 2011-02-02 財団法人21あおもり産業総合支援センター Color liquid crystal display device

Also Published As

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