ES2165818A1 - Antiferroelectrical cells or LCD screens with analogue grey scale, without maintenance tension, and method of manufacture - Google Patents
Antiferroelectrical cells or LCD screens with analogue grey scale, without maintenance tension, and method of manufactureInfo
- Publication number
- ES2165818A1 ES2165818A1 ES200002172A ES200002172A ES2165818A1 ES 2165818 A1 ES2165818 A1 ES 2165818A1 ES 200002172 A ES200002172 A ES 200002172A ES 200002172 A ES200002172 A ES 200002172A ES 2165818 A1 ES2165818 A1 ES 2165818A1
- Authority
- ES
- Spain
- Prior art keywords
- cells
- antiferroelectrical
- manufacture
- grey scale
- tension
- 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.)
- Granted
Links
Landscapes
- Liquid Crystal (AREA)
Abstract
Antiferroelectrical cells or LCD screens with analogue grey scale, without maintenance tension, and method of manufacture.These antiferroelectrical LCD cells usually present, with respect to the tension, a symmetrical optical response between crossed polarizers. In this invention are described:- The behaviour of these cells when they exhibit an asymmetric response, which implies that the curve of optical hysteresis is displaced in its totality according to the axis of applied tensions, producing different optical responses in the positive and negative semi-cycle.- The fundamental advantages of the asymmetric behaviour, which are obtained from static grey scale images, correction of blinking, and elimination of the maintenance tension in the waveform.- A method of manufacture of these cells using asymmetrical equipment on the faces of the cell with diverging orientation.- The necessary waveforms for their control, reducing the semi-cycle of DC compensation but maintaining the product voltage x time or eliminating it completely so that the control pulses become bipolar.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200002172A ES2165818B2 (en) | 2000-09-04 | 2000-09-04 | ANTIPHERROELECTRIC LIQUID CRYSTAL CELLS OR SCREENS WITH ANALOG GRAY SCALE WITHOUT MAINTENANCE VOLTAGE, AND ITS MANUFACTURING METHOD. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES200002172A ES2165818B2 (en) | 2000-09-04 | 2000-09-04 | ANTIPHERROELECTRIC LIQUID CRYSTAL CELLS OR SCREENS WITH ANALOG GRAY SCALE WITHOUT MAINTENANCE VOLTAGE, AND ITS MANUFACTURING METHOD. |
Publications (2)
Publication Number | Publication Date |
---|---|
ES2165818A1 true ES2165818A1 (en) | 2002-03-16 |
ES2165818B2 ES2165818B2 (en) | 2003-04-01 |
Family
ID=8494842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES200002172A Expired - Lifetime ES2165818B2 (en) | 2000-09-04 | 2000-09-04 | ANTIPHERROELECTRIC LIQUID CRYSTAL CELLS OR SCREENS WITH ANALOG GRAY SCALE WITHOUT MAINTENANCE VOLTAGE, AND ITS MANUFACTURING METHOD. |
Country Status (1)
Country | Link |
---|---|
ES (1) | ES2165818B2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0582519A1 (en) * | 1992-08-06 | 1994-02-09 | Showa Shell Sekiyu Kabushiki Kaisha | Liquid crystal composition, and element and device using the same |
US5316694A (en) * | 1992-03-27 | 1994-05-31 | Chisso Corporation | Antiferroelectric liquid crystal composition |
JPH08253441A (en) * | 1995-01-20 | 1996-10-01 | Showa Shell Sekiyu Kk | Liquid crystal compound having asymmetric carbon in 5-membered ring and liquid crystal composition containing the same |
-
2000
- 2000-09-04 ES ES200002172A patent/ES2165818B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5316694A (en) * | 1992-03-27 | 1994-05-31 | Chisso Corporation | Antiferroelectric liquid crystal composition |
EP0582519A1 (en) * | 1992-08-06 | 1994-02-09 | Showa Shell Sekiyu Kabushiki Kaisha | Liquid crystal composition, and element and device using the same |
JPH08253441A (en) * | 1995-01-20 | 1996-10-01 | Showa Shell Sekiyu Kk | Liquid crystal compound having asymmetric carbon in 5-membered ring and liquid crystal composition containing the same |
Also Published As
Publication number | Publication date |
---|---|
ES2165818B2 (en) | 2003-04-01 |
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