Liquid crystal controller and liquid crystal display unit
US6084561A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 14, 1997 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Nov 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2055
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A liquid crystal controller for controlling display of a liquid crystal display device of passive matrix type includes gray scale processing being performed on input data before being written in a frame memory for frame frequency conversion and gray scale processing being performed after the frequency conversion and reading of the data from the frame memory so that an amount of information of display data written in the frame memory can be reduced. Further, since the gray scale display pattern is switched by the same switching frequency as the converted frame frequency, pattern movement and flicker of the gray scale display portions can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.