Combination matrix array display and memory system
US4430648A · kind A · utility
113Cited by
8References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 1981 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | Jan 12, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/409
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device of solid-state matrix type, such as a liquid crystal display device, retains display data for an unlimited period after such data has been written into the display, with no need for periodic re-writing of the display data to compensate for deterioration due to leakage effects. In addition, the display data can be read out again, if required, so that the display device can also be used as a memory. such a display device can also be utilized to perform data input, by writing in of data through application of light to the display surface, such as by using a light pen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.