JPH0784254A - Liquid crystal display element for wide visual field angle and high-speed display - Google Patents

Liquid crystal display element for wide visual field angle and high-speed display

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Publication number
JPH0784254A
JPH0784254A JP5254701A JP25470193A JPH0784254A JP H0784254 A JPH0784254 A JP H0784254A JP 5254701 A JP5254701 A JP 5254701A JP 25470193 A JP25470193 A JP 25470193A JP H0784254 A JPH0784254 A JP H0784254A
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JP
Japan
Prior art keywords
liquid crystal
cell
orientation
crystal display
voltage
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
Application number
JP5254701A
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Japanese (ja)
Inventor
Tatsuo Uchida
龍男 内田
Original Assignee
Tatsuo Uchida
龍男 内田
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tatsuo Uchida, 龍男 内田 filed Critical Tatsuo Uchida
Priority to JP5254701A priority Critical patent/JPH0784254A/en
Publication of JPH0784254A publication Critical patent/JPH0784254A/en
Application status is Pending legal-status Critical

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/137Devices 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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139Devices 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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1393Devices 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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells
    • G02F1/1395Optically compensated birefringence [OCB]- cells or PI- cells
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363Birefringent elements, e.g. for optical compensation

Abstract

PURPOSE:To provide the liquid crystal display element for wide visual field angle and high speed display by subjecting liquid crystal molecules to bend orientation and combining a phase compensation plate. CONSTITUTION:A liquid crystal oriented cell 5 formed by reverse inclining the liquid crystal molecules 3 on the surfaces of upper and lower substrates is used. The liquid crystal makes bend orientation or attains the orientation that twist orientation exists in the central part of the cell when a certain voltage is applied to this cell 5. Further, the liquid crystal cell having such orientation is fast in a change of the liquid crystal with a change in the voltage. The driving voltage, however, increases extremely in this state and, therefore, the used phase compensation plate 4 is so designed as to optically compensate the orientation of the liquid crystal of the certain low voltage in such a case. Sufficient black is displayed with the driving voltage as low as about the voltage of the conventional TV type liquid crystal display element and the visual field angle is widened by adopting such constitution.

Description

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

【0001】 [0001]

【産業上の利用分野】本素子は、テレビジョン、コンピューターのモニター等、電子表示装置一般に用いる。 BACKGROUND OF THE INVENTION This element includes a television, monitor or the like of the computer, used in electronic display devices in general.

【0002】 [0002]

【従来の技術】現在液晶表示素子として、図1に示すT As Presently liquid crystal display device, T shown in FIG. 1
N型(ねじれネマティック型)の液晶表示素子が広く用いられている。 The liquid crystal display device of the N-type (twisted nematic type) are widely used.

【0003】 [0003]

【発明が解決しようとする課題】従来の方式では見る方向により画像の明るさが大きく変化する。 [Problems that the Invention is to Solve brightness of the image varies greatly depending on the viewing direction in the conventional manner. この測定例を図2に示した。 This measurement example shown in FIG. このように場合によっては画像の明るさの反転等が生じるという重大な問題がある。 Thus in some cases there is a serious problem inversion or the like of the brightness of the image occurs. このため、 For this reason,
斜めからの観察はできず、視野角が限られていた。 Can not observe from an oblique viewing angle has been limited.

【0004】また、応答速度が十分でなく、特に図3のように中間調を0から7レベルとした場合、最終状態が1から3レベルである場合に応答が遅くなる。 Further, the response speed is not sufficient, especially when the halftone from 0 and 7 level as shown in FIG. 3, the response becomes slow when the final state is three levels from 1. このため、中間調表示をする場合には十分な動画が得られないという欠点がある。 Therefore, there is a disadvantage that sufficient video obtained when the halftone display.

【0005】本発明は、表示装置において重要な視野角依存性の問題と応答速度の問題を共に解決し、広視野角高速表示の液晶表示素子を実現することを目的としている。 [0005] The present invention is intended to both resolve critical viewing angle dependence problem response speed problems in the display device, to realize a liquid crystal display device of wide viewing angle high-speed display.

【0006】 [0006]

【課題を解決するための手段】従来の液晶表示素子の視野角の問題は、光の入射方向の違いにより光学特性の変化が生じることが原因であった。 SUMMARY OF THE INVENTION The viewing angle of the conventional liquid crystal display device problem, the incidence direction of light except that a change in the optical properties arises was caused. この問題を解決するためには、位相補償板を付加することにより、方向による液晶の光学特性の変化を打ち消せば良い。 To solve this problem, by adding the phase compensator may be Uchikese a change in the optical properties of the liquid crystal due to the direction. ところが、T However, T
N型液晶表示素子では、図1のように液晶分子をねじられた配向を取らせているため偏光特性が非常に複雑になり、位相補償板によって補償を行うことはほとんど不可能である。 The N-type liquid crystal display device, polarization properties because they take the orientation twisted liquid crystal molecules as shown in FIG. 1 is very complex, it is almost impossible to compensate the phase compensator.

【0007】これに対し、本発明では図4のように液晶分子をベンド配向させることにより、液晶部分の光学特性を簡単化し、必要な位相補償板の設計を行いやすいようにした。 [0007] In contrast, in the present invention by the bend alignment of the liquid crystal molecules as shown in FIG. 4, to simplify the optical characteristics of the liquid crystal part was so easy to design the necessary phase compensator. そして位相補償板を組み合わせることにより広視野角化を実現させた。 And it allowed to achieve a wide viewing angle by combining the phase compensator.

【0008】このようなベンド配向を実現するため上下の基板表面における液晶分子を逆向きに傾斜させた液晶配向セルを用いる。 [0008] The liquid crystal alignment cell is tilted liquid crystal molecules in the opposite direction in the upper and lower substrate surface to realize such bend alignment is used. そして、ある電圧をこのセルに印加すると、液晶はベンド配向をするかまたは、セル中央部にねじれ配向が存在する配向をとる。 When applying a certain voltage to the cell, the liquid crystal or the bend alignment, assume the orientation there are twisted in the center of the cell. このいずれの配向でも電気光学的にはほとんど等しいためベンドセルで代表できることになる。 This would be represented by nearly equal for bend cell is also electro-optical in either orientation.

【0009】さらに、このような配向を持つ液晶セルは電圧の変化に対する液晶の変化が速い。 [0009] In addition, a liquid crystal cell having such orientation is fast liquid crystal changes in respect to a change in voltage. このため、このセルを用いることにより高速な応答速度を実現できる。 Therefore, it is possible to realize a faster response speed by using this cell.
しかし、このままでは駆動電圧が非常に高くなる。 However, the driving voltage becomes very high in this state. そこで、ここで用いている位相補償板をある低い電圧の液晶の配向を光学的に補償するように設計を行う。 Therefore, the design and orientation of the liquid crystal of a low voltage with a phase compensator as used herein to optically compensate. このようにすることによって従来のTN型液晶表示素子と同程度の低い駆動電圧で十分な黒を表示することができる。 In such a conventional TN-type liquid crystal display device the same degree of low driving voltage by can display a sufficient black.

【0010】そしてまた、ベンド配向の対称性から液晶分子の長軸が存在する面方向の視野角は広くでき、更に位相補償板を用いることにより、その直交する方向の視野角も著しく広くすることができる。 [0010] And also, the viewing angle in the surface direction is present the long axis of the liquid crystal molecules from the symmetry of the bend alignment can widely be further by using a phase compensator, significantly wider viewing angle in a direction that orthogonal can. この構成の概略図を図5に示す。 It shows a schematic view of the configuration in FIG.

【0011】 [0011]

【作用】高品位の画像を得るためには、十分な黒を表示することが重要である。 [Action] To obtain high-quality images, it is important to display a sufficient black. ベンドセルに位相補償板を取り付けることにより、ある電圧の液晶の光学特性を補償し、角度依存性のない黒状態を作り出すことができる。 By attaching the phase compensator to bend cell to compensate for the liquid crystal of the optical properties of a certain voltage, it is possible to produce a black state with no angular dependence.
このために本発明の表示素子を用いることにより高品位の画像が広い方向から得られる液晶ディスプレイが実現できる。 Liquid crystal display high-quality image by using the display device of the present invention can be obtained from a wide direction for this purpose can be realized.

【0012】また、良好な動画表示を行うためには応答速度が30ミリ秒である必要がある。 Further, in order to perform good movie display, it is necessary response speed is 30 ms. 従来の液晶表示素子は応答速度が不十分であるためにできなかった。 The conventional liquid crystal display device could not be due to the response speed is insufficient. しかし、本発明の素子は十分な応答時間が得られるために良好が動画表示が実現できる。 However, elements of the present invention is good for sufficient response time is obtained moving image display can be realized.

【0013】 [0013]

【実施例】実際に試作した表示素子の角度依存性の特性を測定した結果を図6に示す。 EXAMPLES result of measuring the angular dependence of the characteristics of the display device of actual prototype shown in Figure 6. これより従来の特性を示す図2に比べて著しく改善されていることが確認できる。 From this it has been significantly improved can be confirmed as compared with FIG. 2 showing a conventional characteristics. また、応答速度の特性を測定した結果を図7に示す。 Further, the results of measurement of the characteristics of the response speed in FIG. これより、従来の特性の図3に比べ、著しく改善されていることが確認できる。 From this, compared to Figure 3 of the conventional characteristics, it can be confirmed that it is significantly improved.

【0014】 [0014]

【発明の効果】本発明は、以上説明したような構成されているため、つぎのような効果を持つ。 According to the present invention, since it is configured as described above has the effect as follows.

【0015】液晶ディスプレイにおいて、広い視野角のディスプレイが従来の製造プロセスで実現できる。 [0015] In liquid crystal displays, display of a wide viewing angle can be realized by conventional manufacturing processes. また、中間調の表示が必要なテレビジョンやグラフィック画像端末において動画表示が十分に実現できる。 The moving display can be fully realized in the television and graphic video terminal requiring halftone display.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】従来のTN型液晶表示素子の液晶の配向の概略である。 1 is a schematic of the orientation of the liquid crystal of the conventional TN-type liquid crystal display device.

【図2】従来のTN型液晶表示素子の表示の視角依存性の測定結果である。 It is a [2] viewing angle dependence of the measurement result of the indication of conventional TN-type liquid crystal display device.

【図3】従来のTN型液晶表示素子の表示速度の測定結果である。 3 is a measurement result display speed of a conventional TN type liquid crystal display device.

【図4】広視野角高速表示の液晶表示素子に用いる液晶の配向の概略図である。 [4] used in the liquid crystal display device of wide viewing angle high-speed display is a schematic view of the orientation of the liquid crystal.

【図5】広視野角・高速表示の液晶表示素子の概略図である。 FIG. 5 is a schematic view of a liquid crystal display element of the wide viewing angle and high-speed display.

【図6】広視野角間・高速表示の液晶表示素子の視角依存性の測定結果である。 FIG. 6 is a viewing angle dependence of the measurement results of the liquid crystal display element between the high-speed display wide viewing angle.

【図7】広視野角間・高速表示の液晶表示素子の表示速度の測定結果である。 FIG. 7 is a display speed of the measurement results of the liquid crystal display element between the wide viewing angle and high-speed display.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 偏光子 2 ガラス 3 液晶分子 4 位相補償板 5 ベンド配向セル 1 polariser 2 glass 3 the liquid crystal molecules 4 phase compensator 5 bend orientation cell

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 セル中央部にねじれ配向が存在する液晶セルを含むベンド配向液晶セルと、駆動電圧を下げるとともに視角依存性を低減させる位相補償板を用いる液晶表示素子。 1. A liquid crystal display device using a bend alignment liquid crystal cell comprising a liquid crystal cell twisted in the cell center portion is present, the phase compensator for reducing the viewing angle dependence along with lowering the driving voltage.
  2. 【請求項2】 請求項1に記載したセルと位相補償板を、直交偏光子で挟み、その後方に光源を取り付けた透過型液晶表示素子 2. A cell and phase compensation plate according to claim 1, sandwiched between crossed polarisers, the transmission type liquid crystal display device fitted with a light source behind it
  3. 【請求項3】 請求項1に記載したセルと位相補償板を用い、手前にだけ偏光子を置き、後方には反射板を置く反射型液晶表示素子 3. Using the cell and phase compensation plate according to claim 1, placing only the polarizer in front, the rear placing a reflective plate reflective liquid crystal display device
JP5254701A 1993-09-18 1993-09-18 Liquid crystal display element for wide visual field angle and high-speed display Pending JPH0784254A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Publications (1)

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JPH0784254A true JPH0784254A (en) 1995-03-31

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0774683A2 (en) 1995-11-17 1997-05-21 Fuji Photo Film Co., Ltd. Liquid crystal display
EP0875880A2 (en) * 1997-04-30 1998-11-04 Tohoku Techno-Brains Corporation Field sequential liquid crystal colour display
WO2001031395A1 (en) * 1999-10-26 2001-05-03 Matsushita Electric Industrial Co., Ltd. Liquid crystal display and method for manufacturing the same, and method for driving liquid crystal display
US6256082B1 (en) * 1997-10-06 2001-07-03 Nec Corporation Liquid crystal display with a liquid crystal orientation controlling electrode and processes for manufacturing and driving thereof
US6437844B1 (en) 1996-09-04 2002-08-20 Matsushita Electric Industrial Co., Ltd. Liquid crystal display device and associated fabrication method
US6476792B2 (en) 1999-12-27 2002-11-05 Matsushita Electric Industrial Co., Ltd. Liquid crystal display apparatus and method for driving the same
US6500503B2 (en) 2000-04-26 2002-12-31 Chisso Corporation Cyclohexane derivatives, liquid crystal compositions comprising the same and liquid crystal display devices
US6515725B1 (en) 1999-07-29 2003-02-04 Matsushita Electric Industrial Co., Ltd. Liquid crystal display device and method for manufacturing the same
JP2003315798A (en) * 2002-04-17 2003-11-06 Eastman Kodak Co Optical compensator and liquid crystal display
US6693693B1 (en) 1998-03-23 2004-02-17 Matsushita Electric Industrial Co., Ltd. Liquid crystal display
US6759102B2 (en) 2001-04-27 2004-07-06 Chisso Corporation Liquid crystal compositions and liquid crystal display devices
US6873377B2 (en) 2001-09-11 2005-03-29 Nec Corporation Liquid crystal display device
US6927825B1 (en) 1999-05-14 2005-08-09 Sanyo Electric Co., Ltd. Liquid crystal display using liquid crystal with bend alignment and driving method thereof
US7057684B2 (en) 2000-10-17 2006-06-06 Matsushita Electric Industrial Co., Ltd. Liquid crystal display with varying thickness
US7106294B2 (en) 2002-03-28 2006-09-12 Matsushita Electric Industrial Co., Ltd Liquid crystal display device
US7161574B2 (en) 2001-05-31 2007-01-09 Matsushita Electric Industrial Co., Ltd. Liquid crystal display element driving method and liquid crystal display using the same
US7268777B2 (en) 1996-09-27 2007-09-11 Semiconductor Energy Laboratory Co., Ltd. Electrooptical device and method of fabricating the same
US7408534B2 (en) 1998-06-17 2008-08-05 Semiconductor Energy Laboratory Co., Ltd. Reflective type semiconductor display device
EP1986180A2 (en) 2007-04-26 2008-10-29 Semiconductor Energy Laboratory Co., Ltd. Method for driving liquid crystal display device, liquid crystal display device, and electronic device
CN101840104A (en) * 2010-05-07 2010-09-22 河北工业大学 Liquid crystal light valve having high contrast and quick response
US8836909B2 (en) 2010-11-30 2014-09-16 Semiconductor Energy Laboratory Co., Ltd. Method for manufacturing liquid crystal display device
US9239497B2 (en) 2009-05-29 2016-01-19 Semiconductor Energy Laboratory Co., Ltd. Method for manufacturing liquid crystal display device
US9360704B2 (en) 2007-05-18 2016-06-07 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display device, electronic device, and driving methods thereof

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0774683A2 (en) 1995-11-17 1997-05-21 Fuji Photo Film Co., Ltd. Liquid crystal display
US6437844B1 (en) 1996-09-04 2002-08-20 Matsushita Electric Industrial Co., Ltd. Liquid crystal display device and associated fabrication method
US7268777B2 (en) 1996-09-27 2007-09-11 Semiconductor Energy Laboratory Co., Ltd. Electrooptical device and method of fabricating the same
EP0875880A2 (en) * 1997-04-30 1998-11-04 Tohoku Techno-Brains Corporation Field sequential liquid crystal colour display
US6108058A (en) * 1997-04-30 2000-08-22 Tohoku Techno-Brains Corporation Field sequential Pi cell LCD with compensator
EP0875880B1 (en) * 1997-04-30 2003-12-17 Tohoku Techno-Brains Corporation Field sequential liquid crystal colour display
EP0875880A3 (en) * 1997-04-30 1998-11-11 Tohoku Techno-Brains Corporation Field sequential liquid crystal colour display
US6256082B1 (en) * 1997-10-06 2001-07-03 Nec Corporation Liquid crystal display with a liquid crystal orientation controlling electrode and processes for manufacturing and driving thereof
US6466293B1 (en) 1997-10-06 2002-10-15 Nec Corporation Liquid crystal display with a liquid crystal orientation controlling electrode and processes for manufacturing and driving thereof
US6693693B1 (en) 1998-03-23 2004-02-17 Matsushita Electric Industrial Co., Ltd. Liquid crystal display
US7408534B2 (en) 1998-06-17 2008-08-05 Semiconductor Energy Laboratory Co., Ltd. Reflective type semiconductor display device
US6927825B1 (en) 1999-05-14 2005-08-09 Sanyo Electric Co., Ltd. Liquid crystal display using liquid crystal with bend alignment and driving method thereof
US6515725B1 (en) 1999-07-29 2003-02-04 Matsushita Electric Industrial Co., Ltd. Liquid crystal display device and method for manufacturing the same
US6710832B2 (en) 1999-07-29 2004-03-23 Matsushita Electric Industrial Co., Ltd. Liquid crystal display and method of manufacture
US6801284B2 (en) 1999-07-29 2004-10-05 Matsushita Electric Industrial Co., Ltd. Liquid crystal display and method of manufacture
WO2001031395A1 (en) * 1999-10-26 2001-05-03 Matsushita Electric Industrial Co., Ltd. Liquid crystal display and method for manufacturing the same, and method for driving liquid crystal display
US7202849B2 (en) 1999-12-27 2007-04-10 Matsushita Electric Industrial Co., Ltd. Liquid crystal display apparatus and method for driving the same
US6476792B2 (en) 1999-12-27 2002-11-05 Matsushita Electric Industrial Co., Ltd. Liquid crystal display apparatus and method for driving the same
US6500503B2 (en) 2000-04-26 2002-12-31 Chisso Corporation Cyclohexane derivatives, liquid crystal compositions comprising the same and liquid crystal display devices
US7057684B2 (en) 2000-10-17 2006-06-06 Matsushita Electric Industrial Co., Ltd. Liquid crystal display with varying thickness
US6759102B2 (en) 2001-04-27 2004-07-06 Chisso Corporation Liquid crystal compositions and liquid crystal display devices
US7161574B2 (en) 2001-05-31 2007-01-09 Matsushita Electric Industrial Co., Ltd. Liquid crystal display element driving method and liquid crystal display using the same
US6873377B2 (en) 2001-09-11 2005-03-29 Nec Corporation Liquid crystal display device
US7106294B2 (en) 2002-03-28 2006-09-12 Matsushita Electric Industrial Co., Ltd Liquid crystal display device
JP2003315798A (en) * 2002-04-17 2003-11-06 Eastman Kodak Co Optical compensator and liquid crystal display
JP4526006B2 (en) * 2002-04-17 2010-08-18 日東電工株式会社 Liquid crystal display
EP1986180A2 (en) 2007-04-26 2008-10-29 Semiconductor Energy Laboratory Co., Ltd. Method for driving liquid crystal display device, liquid crystal display device, and electronic device
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