FR2379127A1 - Donor-acceptor-type liquid crystal display device and application of this device - Google Patents
Donor-acceptor-type liquid crystal display device and application of this deviceInfo
- Publication number
- FR2379127A1 FR2379127A1 FR7720177A FR7720177A FR2379127A1 FR 2379127 A1 FR2379127 A1 FR 2379127A1 FR 7720177 A FR7720177 A FR 7720177A FR 7720177 A FR7720177 A FR 7720177A FR 2379127 A1 FR2379127 A1 FR 2379127A1
- Authority
- FR
- France
- Prior art keywords
- crystal display
- guest
- host liquid
- acceptor
- donor
- 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- Withdrawn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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G9/00—Visual time or date indication means
- G04G9/0023—Visual time or date indication means by light valves in general
- G04G9/0029—Details
- G04G9/0047—Details electrical, e.g. selection or application of the operating voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Electric Clocks (AREA)
- Liquid Crystal Substances (AREA)
- Liquid Crystal Display Device Control (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
An electronic clock with a guest-host liquid-crystal display is described. The specified drive electronics subject the guest-host liquid-crystal display to frequencies in excess of 32 Hz, preferably about 1 Hz. As a result, the power consumption of the guest-host liquid-crystal display is reduced to such an extent that there is no need for the previously used complex twisted nematic cell. Apart from the price advantage, the elimination of the previously necessary polarisers allows the proposed guest-host liquid-crystal cell to have a greater viewing angle for the display.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH112477A CH619590GA3 (en) | 1977-01-31 | 1977-01-31 | Liquid-crystal display device of the guest-host effect type and use of this liquid-crystal display device |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2379127A1 true FR2379127A1 (en) | 1978-08-25 |
Family
ID=4203046
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7720177A Withdrawn FR2379127A1 (en) | 1977-01-31 | 1977-06-30 | Donor-acceptor-type liquid crystal display device and application of this device |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5396863A (en) |
CH (1) | CH619590GA3 (en) |
DE (1) | DE2707671A1 (en) |
FR (1) | FR2379127A1 (en) |
GB (1) | GB1595842A (en) |
NL (1) | NL7801018A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0550384A1 (en) * | 1991-12-31 | 1993-07-07 | Xelux Holding Ag | Ante-glare device |
US5444232A (en) * | 1993-05-14 | 1995-08-22 | Xelux Ag | Antiglare device to protect eyes during welding and immediately thereafter for a time based on the intensity and duration of the welding light |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4386350A (en) * | 1979-06-26 | 1983-05-31 | Nippon Electric Co., Ltd. | Display apparatus |
-
1977
- 1977-01-31 CH CH112477A patent/CH619590GA3/en unknown
- 1977-02-23 DE DE19772707671 patent/DE2707671A1/en not_active Withdrawn
- 1977-06-30 FR FR7720177A patent/FR2379127A1/en not_active Withdrawn
- 1977-12-09 JP JP14870277A patent/JPS5396863A/en active Pending
-
1978
- 1978-01-27 GB GB3393/78A patent/GB1595842A/en not_active Expired
- 1978-01-27 NL NL7801018A patent/NL7801018A/en not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0550384A1 (en) * | 1991-12-31 | 1993-07-07 | Xelux Holding Ag | Ante-glare device |
US5444232A (en) * | 1993-05-14 | 1995-08-22 | Xelux Ag | Antiglare device to protect eyes during welding and immediately thereafter for a time based on the intensity and duration of the welding light |
Also Published As
Publication number | Publication date |
---|---|
GB1595842A (en) | 1981-08-19 |
JPS5396863A (en) | 1978-08-24 |
CH619590B (en) | |
DE2707671A1 (en) | 1978-08-03 |
CH619590GA3 (en) | 1980-10-15 |
NL7801018A (en) | 1978-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |