Biphenyl derivatives for photostabilization in pulsed optical darkening apparatus and method
US5080467A · kind A · utility
32Cited by
12References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 27, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Nov 27, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/60
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An apparatus for a liquid crystal image projection system having a liquid crystal cell, including optical apparatus for inducing a uniform texture of scattering centers in a liquid crystal cell by impinging a pulse of optical energy on the liquid crystal cell, thereby the optical energy is absorbed and converted to thermal energy heating the liquid cyrstal to a second temperture, the end of the pulse bringing about a cooling which causes the liquid crystal centers within the liquid crystal cells to scatter in a uniform texture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.