Display device
US5124695A · kind A · utility
48Cited by
14References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1990 |
| Grant date | Jun 23, 1992 |
| Priority date | — |
| Expiry date | Jun 1, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2074
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a liquid crystal display, each pixel is formed of four separately energizable areas which have relative light outputs in the ratio 1:2:4:8 respectively, thereby allowing a range of 16 grey levels to be achieved by appropriate selection of areas. Each of the areas has a number of segments, which are spaced-apart but concentrically arranged, in order to have the same average position, so that different bit patterns cause the pixel to change brightness only, without any apparent positional change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.