Method of improving viewing angle and contrast of liquid crystal displays
US5969700A · kind A · utility
5Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1997 |
| Grant date | Oct 19, 1999 |
| Priority date | — |
| Expiry date | Jul 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/028
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A novel method of driving an LCD simultaneously provides improved viewing angle and improved contrast. Multiple driving voltages are applied to the LC cell to optimize both the viewing angle and the contrast. A first voltage that is optimized for wide viewing angle is applied to the LCD. A second voltage that is greater than the first voltage is selected to provide maximum contrast in the LCD. The first and second voltages are alternately applied to In the LCD, resulting in a display that has high contrast and a wide viewing angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.