Apparatus for shade gradation enhancement and flicker reduction in multishade displays
US5313224A · kind A · utility
26Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1992 |
| Grant date | May 17, 1994 |
| Priority date | — |
| Expiry date | Apr 8, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for increasing the perceived gradation of the shades in visual displays is disclosed. A plurality of signals control the intensity of a sub-pixel of a display so that display can exhibit a native number of shades. Frame rate modulation techniques are used to increase the perceived gradation. Finally, flicker is reduced by spreading the phases of the modulating pixels across time, and the horizontal and vertical axes of the display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.