Bistable liquid crystal display utilizing priming voltages
US4717243A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1986 |
| Grant date | Jan 5, 1988 |
| Priority date | — |
| Expiry date | Mar 21, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0486
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Threshold electric fields required to achieve high speed matrix addressing of selected cells in a bistable nematic liquid crystal storage display are reduced by employing a short duration, priming pulse signal in accordance with the principles of the invention. The short priming pulse signal applied to a selected cell modifies the binding energy for disclinations attached to sites of orientational discontinuity, thereby changing the threshold field required for electrical switching between bistable states. Threshold reduction also depends on the AC frequency and duration of a writing pulse signal applied to the selected cell subsequent to the priming pulse signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.