Display
US7633586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2005 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Jan 12, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/07
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display is provided for switching between a narrow or private viewing mode and a wide or public viewing mode. The display comprises a display device which is controlled to provide display of a desired image or sequence of images. This is associated with a liquid crystal device having at least one liquid crystal layer whose molecules are switchable between a first state providing a first angular viewing range and a second state providing a second angular viewing range which is within and smaller than the first angular viewing range. With the molecules in the second state, the device at least partially blocks light propagating towards part of the first angular viewing range outside the second angular viewing range. The or each liquid crystal layer is in contact with at least one alignment surface, the or each of which comprises a uniform non-patterned alignment surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.