JPS5487499A - Liquid-crystal display unit - Google Patents
Liquid-crystal display unitInfo
- Publication number
- JPS5487499A JPS5487499A JP15600777A JP15600777A JPS5487499A JP S5487499 A JPS5487499 A JP S5487499A JP 15600777 A JP15600777 A JP 15600777A JP 15600777 A JP15600777 A JP 15600777A JP S5487499 A JPS5487499 A JP S5487499A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- liquid
- crystal display
- driving
- display element
- 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.)
- Pending
Links
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
PURPOSE: To prevent a contrast between selected and unselected effective voltage value rates from lowering in case of many digits, by selecting driving frequencies with positive and negative dielectric anisotropies given for two-frequency dynamic driving.
CONSTITUTION: A torsionally-nematic liquid-crystal display element is used which is made of a liquid-cystal composite body. This liquid-crystal composite body, whose anisotropy of the dielectric constant varies with a frequency, has the positive dielectric anisotropy below frequency (fc) and negative dielectric anisotropy above frequency (fc). Then, this liquid-crystal display element is dynamically driven by a two-frequency method; frequency (fL) of a low frequency component as two- frequency driving is lower than (fc), and frequency (fH) of a high-frequency component is higher than (fc). In addition, a low frequency is applied during an addressing operation to turn on it.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15600777A JPS5487499A (en) | 1977-12-23 | 1977-12-23 | Liquid-crystal display unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15600777A JPS5487499A (en) | 1977-12-23 | 1977-12-23 | Liquid-crystal display unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5487499A true JPS5487499A (en) | 1979-07-11 |
Family
ID=15618281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15600777A Pending JPS5487499A (en) | 1977-12-23 | 1977-12-23 | Liquid-crystal display unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5487499A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6173928A (en) * | 1984-09-20 | 1986-04-16 | Matsushita Electric Ind Co Ltd | Liquid-crystal driving system |
JPS61254932A (en) * | 1985-05-07 | 1986-11-12 | Seiko Epson Corp | Liquid crystal electrooptic device |
-
1977
- 1977-12-23 JP JP15600777A patent/JPS5487499A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6173928A (en) * | 1984-09-20 | 1986-04-16 | Matsushita Electric Ind Co Ltd | Liquid-crystal driving system |
JPH0548886B2 (en) * | 1984-09-20 | 1993-07-22 | Matsushita Electric Ind Co Ltd | |
JPS61254932A (en) * | 1985-05-07 | 1986-11-12 | Seiko Epson Corp | Liquid crystal electrooptic device |
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