Method and devices for optimizing the contrast and the angle of view of a liquid crystal display
US5162785A · kind A · utility
92Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1990 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Sep 24, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/028
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is provided for optimizing the contrast and the angle of view of a liquid crystal display, this method consisting in periodically energizing a given zone of the display, permanently measuring the luminance of this zone so as to obtain at all times a pair of values corresponding respectively to the luminance of the zone in the energized state and to the luminance of the zone in the de-energized state, determining the contrast from the values of each of said pairs each of the measured luminance values and adjusting the control voltage of the cell display as a function of the contrast thus defined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.