Display device and method for driving the same
US5818419A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | May 28, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/0428
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device, for displaying a multiple-level gray scale picture through a frame having a plurality of sub-frames which are time-divided in accordance with weight value of gray scale for each sub-frame, comprises sub-frame selection circuit, being supplied with an vertical synchronization signal, for selecting the number of the sub-frames which can be displayed within the period for the single frame in accordance with the frequency of the vertical synchronization signal, and for providing a sub-frame selection signal corresponding to the number of the sub-frames; and display control circuit, operatively connected to the sub-frame selection circuit, for receiving the sub-frame selection signal and an input display data signal and for controlling said display of the multi-level gray scale picture in accordance with the selected number of the sub-frames. When the frequency of Vsync. is varied, the optimal number of the subframes are selected so that a number of sustain pulse, conversion table for pseudo-multiple-level gray scale conversion and for duplicated subframe conversion are properly selected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.