GB2003289A - Liquid crystal display devices - Google Patents
Liquid crystal display devicesInfo
- Publication number
- GB2003289A GB2003289A GB7831668A GB7831668A GB2003289A GB 2003289 A GB2003289 A GB 2003289A GB 7831668 A GB7831668 A GB 7831668A GB 7831668 A GB7831668 A GB 7831668A GB 2003289 A GB2003289 A GB 2003289A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cell
- liquid crystal
- background
- mbba
- scattering
- 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- Withdrawn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
- 239000004973 liquid crystal related substance Substances 0.000 title abstract 3
- 210000004027 cell Anatomy 0.000 abstract 6
- WCLNGBQPTVENHV-MKQVXYPISA-N cholesteryl nonanoate Chemical compound C([C@@H]12)C[C@]3(C)[C@@H]([C@H](C)CCCC(C)C)CC[C@H]3[C@@H]1CC=C1[C@]2(C)CC[C@H](OC(=O)CCCCCCCC)C1 WCLNGBQPTVENHV-MKQVXYPISA-N 0.000 abstract 3
- 230000003098 cholesteric effect Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 abstract 2
- FEIWNULTQYHCDN-UHFFFAOYSA-N mbba Chemical compound C1=CC(CCCC)=CC=C1N=CC1=CC=C(OC)C=C1 FEIWNULTQYHCDN-UHFFFAOYSA-N 0.000 abstract 2
- HHPCNRKYVYWYAU-UHFFFAOYSA-N 4-cyano-4'-pentylbiphenyl Chemical group C1=CC(CCCCC)=CC=C1C1=CC=C(C#N)C=C1 HHPCNRKYVYWYAU-UHFFFAOYSA-N 0.000 abstract 1
- 210000002858 crystal cell Anatomy 0.000 abstract 1
- 239000000975 dye Substances 0.000 abstract 1
- 239000007850 fluorescent dye Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
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
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Abstract
The invention relates to providing good contrast in displays in which one or more display characters of a liquid crystal cell are depicted in colour against a background by electrical addressing of character or background. In this invention the cell 1 in use selectively exhibits optical scattering over either character or background areas, light incident on a dye is partly converted to fluorescent light, and the latter is scattered from the scattering areas of the cell. A colour selective reflector 19 is spaced 21 from the rear 7 of the cell. The fluorescent dye may be dissolved in the liquid crystal layer 3 of the cell, or incorporated in a plate 33 of plastics material bonded to the front 5 of the cell. The cell may exhibit a phase change or cholesteric bistability effect using a mixture of 10% cholesteryl nonanoate (CN) +90% 4,4'-n-pentyl cyanobiphenyl, dynamic scattering (p- methoxybenzylidene-p'-butylaniline MBBA), or a cholesteric texture change effect (MBBA + CN). <IMAGE>
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7831668A GB2003289A (en) | 1977-08-08 | 1978-07-31 | Liquid crystal display devices |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3308777 | 1977-08-08 | ||
| GB7831668A GB2003289A (en) | 1977-08-08 | 1978-07-31 | Liquid crystal display devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2003289A true GB2003289A (en) | 1979-03-07 |
Family
ID=26261713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7831668A Withdrawn GB2003289A (en) | 1977-08-08 | 1978-07-31 | Liquid crystal display devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2003289A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4208106A (en) * | 1976-09-27 | 1980-06-17 | Beckman Instruments, Inc. | Fluorescent displays |
| US4211473A (en) * | 1978-04-12 | 1980-07-08 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Liquid crystal display devices |
| EP0016428A2 (en) * | 1979-03-20 | 1980-10-01 | Siemens Aktiengesellschaft | Device for improving the legibility of passive displays |
| EP0045831A1 (en) * | 1980-08-08 | 1982-02-17 | VDO Adolf Schindling AG | Passive display device |
| EP0060895B1 (en) * | 1980-10-03 | 1985-05-02 | MITSUI TOATSU CHEMICALS, Inc. | Composition for liquid crystal color display |
| GB2196461A (en) * | 1986-10-20 | 1988-04-27 | Gen Electric Plc | Display devices |
| US5227773A (en) * | 1989-05-25 | 1993-07-13 | Hughes Aircraft Company | High-intensity light display device |
-
1978
- 1978-07-31 GB GB7831668A patent/GB2003289A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4208106A (en) * | 1976-09-27 | 1980-06-17 | Beckman Instruments, Inc. | Fluorescent displays |
| US4211473A (en) * | 1978-04-12 | 1980-07-08 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Liquid crystal display devices |
| EP0016428A2 (en) * | 1979-03-20 | 1980-10-01 | Siemens Aktiengesellschaft | Device for improving the legibility of passive displays |
| EP0016428A3 (en) * | 1979-03-20 | 1982-02-17 | Siemens Aktiengesellschaft | Device for improving the legibility of passive displays |
| EP0045831A1 (en) * | 1980-08-08 | 1982-02-17 | VDO Adolf Schindling AG | Passive display device |
| EP0060895B1 (en) * | 1980-10-03 | 1985-05-02 | MITSUI TOATSU CHEMICALS, Inc. | Composition for liquid crystal color display |
| GB2196461A (en) * | 1986-10-20 | 1988-04-27 | Gen Electric Plc | Display devices |
| US5227773A (en) * | 1989-05-25 | 1993-07-13 | Hughes Aircraft Company | High-intensity light display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |