Asymmetric liquid crystal actuation system and method
US6693613B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2001 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Nov 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/36
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A liquid crystal display (LCD) system, comprising a matrix of pixels, actuates each pixel by applying positive and negative voltage differences across a liquid crystal layer. The liquid crystal layer is parallel to a transparent cover. The transparent cover is adjacent to a cover electrode. Each pixel includes a pixel electrode positioned on the opposite side of the liquid crystal layer from the cover electrode. The positive and negative voltage differences are asymmetric to compensate for polarity-dependent characteristics of the LCD materials. The positive and negative voltage differences are applied for durations that counterbalance the asymmetric rates of charge accumulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.