Electrophoretic display employing gray scale capability utilizing area modulation
US5254981A · kind A · utility
163Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1992 |
| Grant date | Oct 19, 1993 |
| Priority date | — |
| Expiry date | Nov 12, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A apparatus provides grey scale capability for an electrophoretic information display. The electrophoretic information display is an XY addressable display with each XY coordinate indicative of a given column and row and defining a pixel. There are described various circuit configurations coupled to the display for impressing upon the display a predetermined digital pattern to cause certain pixels in the display to be energized with respect to other pixels in the display where the combination due to the digital pattern causes a desired grey scale level to appear on a character or on the background of the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.