Method for reducing stabilization time for an LCD using voltage and radiation
US6043860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1998 |
| Grant date | Mar 28, 2000 |
| Priority date | — |
| Expiry date | Mar 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13775
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method for manufacturing a liquid crystal display having both wide angle viewing and fast response is described. A key feature of the method is the addition to the liquid crystal of a small amount of a monomer, selected from among the diacrylates or the monoacrylates, as well as a chiral dopant. Once the display has been assembled, the usual turn-on voltage (about 5 volts) is applied. After allowing the orientations of the directors to stabilize, the liquid crystal is irradiated with ultraviolet light for a few seconds. This causes the dissolved monomer to polymerize in place. The UV irradiation and applied voltage are then terminated. Defects that slow down the director stabilization are now prevented from re-forming so that the next time voltage is applied, the system responds in a few milliseconds. Adding a photoinitiator, in addition to the monomer, is an option.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.