CA1010136A - Liquid crystal cell having controllable optical activity - Google Patents

Liquid crystal cell having controllable optical activity

Info

Publication number: CA1010136A
Authority: CA; Canada
Prior art keywords: liquid crystal; crystal cell; optical activity; controllable optical; controllable
Prior art date: 1970-12-04
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

Application number

CA127,762A

Other versions

CA127762S (en

Inventor

Wolfgang Helfrich

Martin Schadt

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.)

BBC Brown Boveri AG Switzerland

F Hoffmann La Roche AG

Original Assignee

BBC Brown Boveri AG Switzerland

F Hoffmann La Roche AG

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.)

1970-12-04

Filing date

1971-11-16

Publication date

1977-05-10

1970-12-04 Priority claimed from CH1793770A external-priority patent/CH532261A/en

1971-04-13 Priority claimed from CH526071A external-priority patent/CH564207A5/de

1971-11-16 Application filed by BBC Brown Boveri AG Switzerland, F Hoffmann La Roche AG filed Critical BBC Brown Boveri AG Switzerland

1977-05-10 Application granted granted Critical

1977-05-10 Publication of CA1010136A publication Critical patent/CA1010136A/en

Status Expired legal-status Critical Current

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

Landscapes

Physics & Mathematics (AREA)
Nonlinear Science (AREA)
Chemical & Material Sciences (AREA)
Crystallography & Structural Chemistry (AREA)
General Physics & Mathematics (AREA)
Optics & Photonics (AREA)
Liquid Crystal (AREA)
Holo Graphy (AREA)
Liquid Crystal Substances (AREA)

CA127,762A 1970-12-04 1971-11-16 Liquid crystal cell having controllable optical activity Expired CA1010136A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
CH1793770A CH532261A (en)	1970-12-04	1970-12-04	Light control cell
CH526071A CH564207A5 (en)	1971-04-13	1971-04-13

Publications (1)

Publication Number	Publication Date
CA1010136A true CA1010136A (en)	1977-05-10

Family

ID=25697330

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA127,762A Expired CA1010136A (en)	1970-12-04	1971-11-16	Liquid crystal cell having controllable optical activity

Country Status (11)

Country	Link
BE (1)	BE776192A (en)
CA (1)	CA1010136A (en)
DD (1)	DD97070A5 (en)
DE (1)	DE2158563B2 (en)
DK (1)	DK133714B (en)
ES (1)	ES397630A1 (en)
FR (1)	FR2117358A5 (en)
GB (1)	GB1372868A (en)
IT (1)	IT946051B (en)
NL (1)	NL150579B (en)
SE (1)	SE374965B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5488499A (en) *	1992-07-16	1996-01-30	Seiko Epson Corporation	Liquid crystal display device utilizing a chiral nematic liquid crystal medium operative relative to two metastable states
US5594464A (en) *	1992-05-07	1997-01-14	Seiko Epson Corporation	Liquid crystal display device having two metastable states and driving method therefor
US6252571B1 (en)	1995-05-17	2001-06-26	Seiko Epson Corporation	Liquid crystal display device and its drive method and the drive circuit and power supply circuit device used therein

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS536857B2 (en) *	1972-08-16	1978-03-11
FR2198167B1 (en) *	1972-08-29	1976-05-21	Commissariat Energie Atomique
US3897996A (en)	1972-09-30	1975-08-05	Dainippon Printing Co Ltd	Electro-optic display device
DE2366514C3 (en) *	1972-09-30	1985-10-10	Dai Nippon Printing Co., Ltd., Tokio/Tokyo	Electro-optical display device
DE2410527C3 (en) *	1973-03-08	1983-11-03	Casio Computer Co., Ltd., Tokyo	Electronic time display device
FR2220804B1 (en) *	1973-03-08	1976-10-08	Western Electric Co
US3837729A (en) *	1973-05-14	1974-09-24	Hoffmann La Roche	Liquid crystal display
CH564206A5 (en) *	1973-09-27	1975-07-15	Bbc Brown Boveri & Cie
GB1472247A (en) *	1974-02-21	1977-05-04	Secr Defence	Liquid crystal devices
GB1478592A (en) *	1974-03-01	1977-07-06	Secr Defence	Liquid crystal devices
CH573126A5 (en) *	1974-06-07	1976-02-27	Bbc Brown Boveri & Cie
DE2554226C3 (en) *	1975-12-03	1985-07-11	Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen	Radiation collector and compressor in the form of a fluorescent plastic plate
DE2658568C2 (en) *	1975-12-25	1983-12-22	Sharp K.K., Osaka	A liquid crystal display device comprising a pleochroic dye guest material and a nematic liquid crystal host material
FR2356173A1 (en) *	1976-06-21	1978-01-20	Gen Electric	PROCESS FOR IMPROVING THE DESCENT TIME OF A DISPLAY DEVICE COMPOSED OF NEMATIC PROPELLERED LIQUID CRYSTALS
DE2706375C3 (en) *	1977-02-15	1982-08-26	Siemens AG, 1000 Berlin und 8000 München	Display arrangement with a light valve device, in particular a liquid crystal cell
US4231068A (en) *	1977-06-15	1980-10-28	The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland	Optical screens
DE2735195C2 (en) *	1977-08-04	1982-05-06	Siemens AG, 1000 Berlin und 8000 München	Anti-glare rearview mirror
DE2849381C3 (en) *	1978-11-14	1981-04-30	Siemens AG, 1000 Berlin und 8000 München	Passive electro-optical display device for seven-segment display with false display detection
DE2910779C3 (en) *	1979-03-19	1981-11-19	Siemens AG, 1000 Berlin und 8000 München	Display module with an electro-optical display device
FR2452122A1 (en) *	1979-03-23	1980-10-17	Thomson Csf	ADJUSTABLE OPTICAL ATTENUATOR DEVICE WITH ELECTRICAL CONTROL AND TAKING APPARATUS COMPRISING THIS DEVICE
DE3107520A1 (en) *	1981-02-27	1982-09-16	Siemens AG, 1000 Berlin und 8000 München	"METHOD FOR PRODUCING ORIENTING LAYERS FOR LIQUID CRYSTAL DISPLAYS AND LIQUID CRYSTAL DISPLAYS HAVING ORIENTING LAYERS"
US4435047A (en) *	1981-09-16	1984-03-06	Manchester R & D Partnership	Encapsulated liquid crystal and method
DE3138518C1 (en) *	1981-09-28	1983-02-24	Siemens AG, 1000 Berlin und 8000 München	Field effect liquid crystal cell
US4523848A (en) *	1981-10-01	1985-06-18	National Research Development Corporation	Polariscope
US4596446B2 (en) *	1982-06-29	1997-03-18	Secr Defence Brit	Liquid crystal devices with particular cholestric pitch-cell thickness ratio
FR2558025B1 (en) *	1984-01-10	1987-05-22	Thomson Csf	LINKING SYSTEM FOR SIMULTANEOUS TWO-WAY FIBER OPTIC TRANSMISSIONS
JPS61210324A (en) *	1985-03-15	1986-09-18	Hitachi Ltd	Liquid crystal display element
JPS6421416A (en) *	1987-07-17	1989-01-24	Hitachi Ltd	Liquid crystal display element
DE3918828C2 (en) *	1989-06-09	1997-12-18	Aeg Ges Moderne Inf Sys Mbh	Liquid crystal display device
DE4011116A1 (en) *	1990-04-06	1991-10-10	Nokia Unterhaltungselektronik	METHOD FOR DETERMINING THE INCLINE ANGLE OF LIQUID CRYSTAL MOLECULES OF A LIQUID CRYSTAL CELL
DE4212744C2 (en) *	1992-04-16	1994-10-13	Merck Patent Gmbh	TN cell with d. DELTAn between 0.15 and 0.70 mum
DE4416298A1 (en) *	1994-05-09	1995-11-16	Abb Research Ltd	Method and device for optically determining a physical quantity
US8820937B2 (en)	2010-08-17	2014-09-02	Lc-Tec Displays Ab	Optical polarization state modulator assembly for use in stereoscopic three-dimensional image projection system
US8184215B2 (en)	2010-08-17	2012-05-22	Lc-Tec Displays Ab	High-speed liquid crystal polarization modulator
US8023052B1 (en)	2010-08-17	2011-09-20	Lc-Tec Displays Ab	High-speed liquid crystal polarization modulator
DE102012221527A1 (en)	2012-11-26	2014-06-12	Heine Optotechnik Gmbh & Co Kg	Optical diagnostic tool, particularly dermatoscope for investigating examination area of patient, has first polarizing filter unit downstream in illumination beam path of illumination unit in illuminating direction

1971
- 1971-11-11 IT IT3098171A patent/IT946051B/en active
- 1971-11-16 CA CA127,762A patent/CA1010136A/en not_active Expired
- 1971-11-17 NL NL7115838A patent/NL150579B/en not_active Application Discontinuation
- 1971-11-18 GB GB5367871A patent/GB1372868A/en not_active Expired
- 1971-11-25 DE DE19712158563 patent/DE2158563B2/en not_active Ceased
- 1971-12-02 SE SE1548771A patent/SE374965B/en unknown
- 1971-12-03 FR FR7143474A patent/FR2117358A5/fr not_active Expired
- 1971-12-03 BE BE776192A patent/BE776192A/en not_active IP Right Cessation
- 1971-12-03 DD DD15936471A patent/DD97070A5/xx unknown
- 1971-12-03 DK DK595171A patent/DK133714B/en not_active IP Right Cessation
- 1971-12-03 ES ES397630A patent/ES397630A1/en not_active Expired

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5594464A (en) *	1992-05-07	1997-01-14	Seiko Epson Corporation	Liquid crystal display device having two metastable states and driving method therefor
US5900852A (en) *	1992-05-07	1999-05-04	Seiko Epson Corporation	Liquid crystal display device having two metastable states and driving method therefor
US5488499A (en) *	1992-07-16	1996-01-30	Seiko Epson Corporation	Liquid crystal display device utilizing a chiral nematic liquid crystal medium operative relative to two metastable states
US6072558A (en) *	1992-07-16	2000-06-06	Seiko Epson Corporation	Electrooptical element switchable between a plurality of metabstable states
US6252571B1 (en)	1995-05-17	2001-06-26	Seiko Epson Corporation	Liquid crystal display device and its drive method and the drive circuit and power supply circuit device used therein

Also Published As

Publication number	Publication date
DK133714B (en)	1976-07-05
BE776192A (en)	1972-06-05
GB1372868A (en)	1974-11-06
DD97070A5 (en)	1973-04-12
ES397630A1 (en)	1975-03-16
DE2158563A1 (en)	1972-06-29
DK133714C (en)	1988-05-02
IT946051B (en)	1973-05-21
NL150579B (en)	1976-08-16
NL7115838A (en)	1972-06-06
SE374965B (en)	1975-03-24
FR2117358A5 (en)	1972-07-21
DE2158563B2 (en)	1975-10-23

Publication	Publication Date	Title
CA1010136A (en)	1977-05-10	Liquid crystal cell having controllable optical activity
CA930069A (en)	1973-07-10	Liquid crystal mirror
CA975152A (en)	1975-09-30	Liquid crystals
CA981778A (en)	1976-01-13	Liquid crystal display
CA1023543A (en)	1978-01-03	Electro-optical display
CA1014254A (en)	1977-07-19	Enclosures for liquid crystal cells
CA1004316A (en)	1977-01-25	Liquid crystal display
CA944051A (en)	1974-03-19	Compounded liquid crystal cells
CA931768A (en)	1973-08-14	Solid state timepiece with liquid crystal display
CA931651A (en)	1973-08-07	Optical display
CA937313A (en)	1973-11-20	Electro-optic devices
CA1003204A (en)	1977-01-11	Liquid crystal cell
CA957756A (en)	1974-11-12	Liquid crystal cells
CA929612A (en)	1973-07-03	Liquid crystal electro-optical modulators
AT305392B (en)	1973-02-26	Liquid crystal cell
CA925967A (en)	1973-05-08	Crystal filter
CA963781A (en)	1975-03-04	Crystal sketching
CA971259A (en)	1975-07-15	Electro-optical light modulation cell
CA966923A (en)	1975-04-29	Electrochromic devices
CA906067A (en)	1972-07-25	Crystal controlled electric clock
CA1013768A (en)	1977-07-12	Liquid crystal compounds
CA944040A (en)	1974-03-19	Optical display
AU456747B2 (en)	1972-11-16	Liquid crystal cell
AU2888271A (en)	1972-11-16	Liquid crystal cell
CA985676A (en)	1976-03-16	Liquid crystal compounds