Graphic controller for active matrix addressed bistable reflective cholesteric displays
US6816138B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Apr 18, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A graphics controller for a color display system having a bistable liquid crystal display (LCD) for displaying a plurality of pixels arranged in a matrix includes a memory device for storing color data and status bits corresponding to each of the pixels, and a generating device for generating voltage data corresponding to the pixels based on the color data and the status bits for each of the pixels. In an exemplary case, the bistable LCD is a Cholesteric LCD. Preferably, the generating device has a first mode of operation in which the data corresponding to the pixels is generated for each corresponding pixel and a second mode of operation in which no data is generated; the generating device switches from the first operating mode to the second operating mode when all of the status bits for all of the pixels are zeros.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.