FR2356173A1 - Procede pour ameliorer le temps de descente d'un dispositif d'affichage a composition de cristaux liquides nematique en helice - Google Patents
Procede pour ameliorer le temps de descente d'un dispositif d'affichage a composition de cristaux liquides nematique en heliceInfo
- Publication number
- FR2356173A1 FR2356173A1 FR7718465A FR7718465A FR2356173A1 FR 2356173 A1 FR2356173 A1 FR 2356173A1 FR 7718465 A FR7718465 A FR 7718465A FR 7718465 A FR7718465 A FR 7718465A FR 2356173 A1 FR2356173 A1 FR 2356173A1
- Authority
- FR
- France
- Prior art keywords
- nematic
- propellered
- improving
- display device
- descent time
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells 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
- G02F1/1396—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells 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 liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/58—Dopants or charge transfer agents
- C09K19/586—Optically active dopants; chiral dopants
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Substances (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Procédé diminuant le temps de descente Il consiste à espacer les surfaces intérieures en regard de la paire de substrats 17, 18 d'une distance de séparation donnée D, à remplir le volume délimité entre ces surfaces intérieures séparées avec une quantité d'une composition de cristaux liquides nématique ayant une anisotropie diélectrique positive 20, et à ajouter une quantité prédéterminée d'un additif optiquement actif à la composition de cristaux liquides pour rendre le pas naturel de cette dernière supérieur à la distance de séparation mais inférieur à quatre fois cette distance. Application aux affichages de montre.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US69798276A | 1976-06-21 | 1976-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2356173A1 true FR2356173A1 (fr) | 1978-01-20 |
Family
ID=24803413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7718465A Withdrawn FR2356173A1 (fr) | 1976-06-21 | 1977-06-16 | Procede pour ameliorer le temps de descente d'un dispositif d'affichage a composition de cristaux liquides nematique en helice |
Country Status (4)
Country | Link |
---|---|
US (1) | US4143947A (fr) |
JP (1) | JPS537350A (fr) |
DE (1) | DE2727562A1 (fr) |
FR (1) | FR2356173A1 (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2416519A1 (fr) * | 1978-02-06 | 1979-08-31 | Ebauches Sa | Cellule d'affichage electro-optique passif |
EP0098070A2 (fr) * | 1982-06-29 | 1984-01-11 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and | Dispositifs à cristal liquide |
EP0112286A1 (fr) * | 1982-11-23 | 1984-06-27 | Asulab S.A. | Cellule d'affichage à cristaux liquides |
FR2551558A1 (fr) * | 1983-08-31 | 1985-03-08 | Hitachi Ltd | Dispositif de reproduction a cristal liquide |
US4596446A (en) * | 1982-06-29 | 1986-06-24 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Liquid crystal devices with particular cholesteric pitch-cell thickness ratio |
WO1993021281A1 (fr) * | 1992-04-16 | 1993-10-28 | Merck Patent Gmbh | Cellule a cristal liquide nematique avec representation amelioree de l'echelle des gris |
Families Citing this family (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2658568C2 (de) * | 1975-12-25 | 1983-12-22 | Sharp K.K., Osaka | Flüssigkristall-Darstellungseinrichtung mit einem pleochroitischen Farbstoff-Gastmaterial und einem nematischen Flüssigkristall-Wirtmaterial |
US4208106A (en) * | 1976-09-27 | 1980-06-17 | Beckman Instruments, Inc. | Fluorescent displays |
US4702561A (en) * | 1977-04-11 | 1987-10-27 | Minnesota Mining And Manufacturing Company | Pleochroic dyes and electro-optical displays therewith |
JPS54134452A (en) * | 1978-04-10 | 1979-10-18 | Hitachi Ltd | Quest-host type liquid crystal display device |
DE2827471C2 (de) * | 1978-06-22 | 1982-09-02 | Siemens AG, 1000 Berlin und 8000 München | Flüssigkristallzelle mit einer induzierten cholesterischen Phase |
US4203862A (en) * | 1978-12-22 | 1980-05-20 | Timex Corporation | Liquid crystal composition |
US4232949A (en) * | 1979-02-23 | 1980-11-11 | Minnesota Mining And Manufacturing Company | Liquid crystal compositions containing pleochroic dye |
US4232950A (en) * | 1979-02-23 | 1980-11-11 | Minnesota Mining And Manufacturing Company | Liquid crystal compositions including pleochroic dye |
US4228030A (en) * | 1979-02-28 | 1980-10-14 | General Electric Company | Liquid crystal compositions |
JPS56156817A (en) * | 1980-05-09 | 1981-12-03 | Hitachi Ltd | Liquid-crystal display element |
US4394070A (en) * | 1980-07-16 | 1983-07-19 | Minnesota Mining And Manufacturing Company | Helichromic compounds and displays |
US4514045A (en) * | 1981-06-22 | 1985-04-30 | Minnesota Mining And Manufacturing Company | Helichromic-smectic liquid crystal compositions and display cells |
JPS5923328A (ja) * | 1982-07-29 | 1984-02-06 | Sharp Corp | 液晶表示装置 |
IT1172826B (it) * | 1983-04-20 | 1987-06-18 | Consiglio Nazionale Ricerche | Dispositivo a cristalli liquidi per la rotazione continua della polarizzazione selettiva di luce monocromatica |
IN161652B (fr) * | 1983-07-12 | 1988-01-09 | Bbc Brown Boveri & Cie | |
JPS60102086A (ja) * | 1983-10-03 | 1985-06-06 | ポラロイド コ−ポレ−シヨン | 3次元テレビジヨン作像装置 |
DE3526973A1 (de) * | 1984-08-01 | 1986-02-06 | Sharp Kk | Blendfreier spiegel vom fluessigkristall-typ |
US4780240A (en) * | 1985-08-02 | 1988-10-25 | Chisso Corporation | Liquid crystal composition |
JPS62148924A (ja) * | 1985-12-23 | 1987-07-02 | Sharp Corp | 液晶光量変調素子 |
US5327269A (en) * | 1992-05-13 | 1994-07-05 | Standish Industries, Inc. | Fast switching 270° twisted nematic liquid crystal device and eyewear incorporating the device |
US6258443B1 (en) | 1994-09-28 | 2001-07-10 | Reflexite Corporation | Textured retroreflective prism structures and molds for forming same |
JPH08166605A (ja) * | 1994-10-14 | 1996-06-25 | Sharp Corp | 液晶表示装置 |
US5699133A (en) * | 1995-05-30 | 1997-12-16 | Sanyo Electric Co., Ltd. | Liquid crystal shutter having a specified zero voltage time viscosity product or a specified driving frequency |
JPH112793A (ja) * | 1997-06-13 | 1999-01-06 | Matsushita Electric Ind Co Ltd | 液晶表示パネル |
DE10112954A1 (de) * | 2000-04-18 | 2001-12-13 | Merck Patent Gmbh | Elektrooptische Flüssigkristallanzeige und Flüssigkristallmedium |
US8643595B2 (en) * | 2004-10-25 | 2014-02-04 | Sipix Imaging, Inc. | Electrophoretic display driving approaches |
US8243013B1 (en) | 2007-05-03 | 2012-08-14 | Sipix Imaging, Inc. | Driving bistable displays |
US20080303780A1 (en) | 2007-06-07 | 2008-12-11 | Sipix Imaging, Inc. | Driving methods and circuit for bi-stable displays |
US8279395B2 (en) * | 2007-09-07 | 2012-10-02 | Reald Inc. | System and eyewear for viewing stereoscopic imagery |
US9224342B2 (en) * | 2007-10-12 | 2015-12-29 | E Ink California, Llc | Approach to adjust driving waveforms for a display device |
US8462102B2 (en) * | 2008-04-25 | 2013-06-11 | Sipix Imaging, Inc. | Driving methods for bistable displays |
US8558855B2 (en) * | 2008-10-24 | 2013-10-15 | Sipix Imaging, Inc. | Driving methods for electrophoretic displays |
US9019318B2 (en) * | 2008-10-24 | 2015-04-28 | E Ink California, Llc | Driving methods for electrophoretic displays employing grey level waveforms |
US20100194789A1 (en) * | 2009-01-30 | 2010-08-05 | Craig Lin | Partial image update for electrophoretic displays |
US20100194733A1 (en) * | 2009-01-30 | 2010-08-05 | Craig Lin | Multiple voltage level driving for electrophoretic displays |
US9251736B2 (en) | 2009-01-30 | 2016-02-02 | E Ink California, Llc | Multiple voltage level driving for electrophoretic displays |
US8294850B2 (en) * | 2009-03-31 | 2012-10-23 | Apple Inc. | LCD panel having improved response |
US9460666B2 (en) | 2009-05-11 | 2016-10-04 | E Ink California, Llc | Driving methods and waveforms for electrophoretic displays |
US8576164B2 (en) | 2009-10-26 | 2013-11-05 | Sipix Imaging, Inc. | Spatially combined waveforms for electrophoretic displays |
US11049463B2 (en) * | 2010-01-15 | 2021-06-29 | E Ink California, Llc | Driving methods with variable frame time |
US8558786B2 (en) * | 2010-01-20 | 2013-10-15 | Sipix Imaging, Inc. | Driving methods for electrophoretic displays |
US9224338B2 (en) * | 2010-03-08 | 2015-12-29 | E Ink California, Llc | Driving methods for electrophoretic displays |
US9013394B2 (en) | 2010-06-04 | 2015-04-21 | E Ink California, Llc | Driving method for electrophoretic displays |
TWI598672B (zh) | 2010-11-11 | 2017-09-11 | 希畢克斯幻像有限公司 | 電泳顯示器的驅動方法 |
US10726760B2 (en) | 2013-10-07 | 2020-07-28 | E Ink California, Llc | Driving methods to produce a mixed color state for an electrophoretic display |
US10380931B2 (en) | 2013-10-07 | 2019-08-13 | E Ink California, Llc | Driving methods for color display device |
TWI550332B (zh) | 2013-10-07 | 2016-09-21 | 電子墨水加利福尼亞有限責任公司 | 用於彩色顯示裝置的驅動方法 |
WO2019241670A1 (fr) * | 2018-06-15 | 2019-12-19 | Compound Photonics U.S. Corporation | Mélanges de cristaux liquides, leurs procédés de fabrication et dispositifs les comprenant |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2117358A5 (fr) * | 1970-12-04 | 1972-07-21 | Hoffmann La Roche | |
FR2220804A1 (fr) * | 1973-03-08 | 1974-10-04 | Western Electric Co | |
FR2283941A1 (fr) * | 1974-09-03 | 1976-04-02 | Beckman Instruments Inc | Compositions de cristaux liquides nematiques |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3650603A (en) * | 1967-12-05 | 1972-03-21 | Rca Corp | Liquid crystal light valve containing a mixture of nematic and cholesteric materials in which the light scattering effect is reduced when an electric field is applied |
US3806230A (en) * | 1971-12-14 | 1974-04-23 | Xerox Corp | Liquid crystal imaging system having optical storage capabilities |
US3891307A (en) * | 1973-03-20 | 1975-06-24 | Matsushita Electric Ind Co Ltd | Phase control of the voltages applied to opposite electrodes for a cholesteric to nematic phase transition display |
US3975286A (en) * | 1974-09-03 | 1976-08-17 | Beckman Instruments, Inc. | Low voltage actuated field effect liquid crystals compositions and method of synthesis |
-
1977
- 1977-06-16 FR FR7718465A patent/FR2356173A1/fr not_active Withdrawn
- 1977-06-18 DE DE19772727562 patent/DE2727562A1/de not_active Withdrawn
- 1977-06-21 JP JP7290377A patent/JPS537350A/ja active Pending
-
1978
- 1978-02-21 US US05/879,367 patent/US4143947A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2117358A5 (fr) * | 1970-12-04 | 1972-07-21 | Hoffmann La Roche | |
FR2220804A1 (fr) * | 1973-03-08 | 1974-10-04 | Western Electric Co | |
FR2283941A1 (fr) * | 1974-09-03 | 1976-04-02 | Beckman Instruments Inc | Compositions de cristaux liquides nematiques |
Non-Patent Citations (1)
Title |
---|
EXBK/77 * |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2416519A1 (fr) * | 1978-02-06 | 1979-08-31 | Ebauches Sa | Cellule d'affichage electro-optique passif |
EP0098070A2 (fr) * | 1982-06-29 | 1984-01-11 | The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and | Dispositifs à cristal liquide |
EP0098070A3 (en) * | 1982-06-29 | 1984-12-27 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And | Liquid crystal devices |
US4596446A (en) * | 1982-06-29 | 1986-06-24 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Liquid crystal devices with particular cholesteric pitch-cell thickness ratio |
EP0112286A1 (fr) * | 1982-11-23 | 1984-06-27 | Asulab S.A. | Cellule d'affichage à cristaux liquides |
FR2551558A1 (fr) * | 1983-08-31 | 1985-03-08 | Hitachi Ltd | Dispositif de reproduction a cristal liquide |
WO1993021281A1 (fr) * | 1992-04-16 | 1993-10-28 | Merck Patent Gmbh | Cellule a cristal liquide nematique avec representation amelioree de l'echelle des gris |
Also Published As
Publication number | Publication date |
---|---|
US4143947A (en) | 1979-03-13 |
JPS537350A (en) | 1978-01-23 |
DE2727562A1 (de) | 1977-12-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |