Viewing angle compensation of LCD display
US5818925A · kind A · utility
7Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1996 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Dec 31, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/028
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The characters of liquid crystal display devices (LCDs) normally exhibit asymmetrical visibility or identifiability dependent upon the direction from which the display is viewed. The asymmetrical identifiability is controllable by the bias applied to the LCD. The contrast of a liquid crystal display device used in a telephone apparatus is automatically controlled by a position sensing switch in accordance with the spatial orientation of the telephone apparatus in order to select the bias that will effectuate the greatest identifiability for the characters of display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.