Method and system for displaying images on a display device using an offscreen video memory
US5381347A · kind A · utility
34Cited by
4References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1992 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | Dec 21, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A user invokes an application program and initiates a request to display an image on a display device. In response, a display device driver creates a bitmap in an offscreen video memory of an adapter card. The display device driver then writes data corresponding to the requested image to the bitmap. At an appropriate time, the display device driver copies the bitmap from the offscreen video memory to an onscreen video memory of the adapter card over an adapter bus. The requested image is then displayed on the display device using the bitmap stored in the onscreen video memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.