Drive for a display device
US6069610A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1995 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Nov 14, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2803
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an error diffusion processing unit to get a false half tone diffusing in the surroundings the luminance error between the original picture element signal quantizedly input and the preceding data, one dot of said signal is converted into plural picture elements. The respective picture elements (pixels) thus converted are compared with the prior data to detect the luminance error, which will then be weighted by multiplying it with certain coefficient to give, for instance, the reproduced error in one line past, that in one dot past and further the reproduced error a in one-line and one-dot past, which will respectively be added to the original pixels. Producing a false tone by error variance in unit of pixel enables to display the half tone without expanding the half tone display area beyond required dot number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.