Display system having a font cache for the temporary storage of font data
US5208908A · kind A · utility
42Cited by
1References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1990 |
| Grant date | May 4, 1993 |
| Priority date | — |
| Expiry date | Feb 26, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/222
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display system has, in addition to a display memory for the main storage of display information for a character mode, a separate cache for the temporary storage of the definitions of one or more fonts currently required for display and control logic for updating the font cache from the display memory. This enables the efficient support of a character mode on a display system, particularly where the display memory of that system is implemented with dual-ported memory technology. Compatibility with existing display standards is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.