Method, materials and apparatus for driving gray-scale bistable cholesteric displays
US7696971B2 · kind B2 · utility
0Cited by
6References
10Claims
0Family size
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Key dates
| Filing date | May 10, 2002 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Sep 3, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/065
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention provides a method for controlling the grey-scale modulation of a reflective bistable cholesteric display by applying selected sequences of high and low pulses to modulate the cholesteric domain size and helical axis orientation. Non-mesogenic dopants may also be added to reduce the drive voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.