Graphic display system with secondary pixel image storage
US4862155A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1987 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Oct 26, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/39
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved graphics display system includes a picture processor for processing display lists defining graphic designs, the display lists comprising pixel data and/or instructions for generating pixel data. The system further includes a display controller which stores pixel data in a frame buffer memory and controls a display of graphic designs in accordance therewith. When a display list defining a graphic design is changed but the design is not to be displayed, the display list is processed by the picture processor, but the output pixel data generated by the picture processor is routed not to the display controller but to a control processor which stores the generated pixel data in a second memory. When the design is thereafter to be displayed, the control processor generates a secondary display list including the pixel data stored in the second memory to the picture processor. The picture processor then forwards the pixel data included in the secondary display list to the display controller for storage in the frame buffer memory so as to initiate display of the graphic design.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.